US2451191A - Stop mechanism and means for mounting - Google Patents

Description

0a. 12, 1948. R. G. BIRR ,4

STOP MECHANISM AND MEANS FOR MOUNTING Filed June 20, 1945 a 3 Sheets-Sheet 1 Oct. 12, 1948. R. G. BIRR 2,451,191

STOP MECHANISM AND MEANS FOR MOUNTING Filed June 20, 1945 3 Sheets-Sheet 2 Oct- 12 1948. R. G. am 2,451,191

STOP MECHANISM AND MEANS FOR MOUNTING Filed June 20, 1945 :s Sheets-Sheet- 3 j/Z 706 /07 J05 5 K $5 L m /Ma duv Patented Oct. 12, 1948 STOP MECHANISM AND MEANS FOR MOUNTING Rudolph G. Birr, Lombard, 111,, assignor, by mesne assignments, to American Linen Supply (30., Carson City, Nev., a corporation of Nevada Application June 20, 1945, Serial No. 600,620

17 Claims.

This invention relates to improvements in stop mechanisms for dispensing apparatuses, and has as one of its objects to provide an improved form of apparatus which allows a user to obtain a plurality of consecutive short lengths of toweling, and then makes him wait a certain length of time before he can obtain th next consecutive period.

It is a further object of the invention to dispense short lengths of toweling which are only sufiicient for drying the fingers or hands, and to make it necessary for the user to operate the dispensing apparatus more than once if he desires a length of toweling sufiicient for drying hands and face.

Other objects of the invention are: To provide a new mounting means for a stop mechanism; to utilize the support for the stop mechanism as means for closing an opening through which the dispensing rolls can be drawn; to provide means for connecting a part of the stop mechanism to one of the dispensing rolls so that the same can be easily detached and thus permit removal of the support for the stop mechanism; to mount a plurality of groups of parts of a mechanism on separate plates so that either group may be removed independently of the other; to provide a new type of timer; to provide means by which a gravity-operable part of a timer controls a pawl; to provide a new form of stop-controlled ratcheting mechanism which can be operated by or from a dispensing roll; to timecontrol the timer of a stop-mechanism for said roll; to provide a timer-controlled and controlling mechanism in which a timer holds a part of the mechanism immovable while another part of the mechanism is moving to an initial position preparatory to feeding; to provide a new ratcheting mechanism which can be used for various purposes; and to provid compact and relatively simple mechanisms or structures.

Another object of this invention is to provide a new timer construction in which a movable part of the timer is so mounted as to reduce the friction surface area to a minimum. This is accomplished in a timer of the type in which one part moves toward another to cause engagement of timer parts, which parts, as well as the movable part, remain immovable during timing and in which one of the parts with said movable part automatically move to an initial position which corresponds to timer unset position.

Another object of the invention is to provide a cabinet Which has a cover adapted to entirely enclose an inner cabinet section (attached to the wall) and which has the dispensing mechanism thereon, which cover can be opened to such a position as to eXpose to full view and easy access, certain structures of the dispensing mechanism so that they can be removed while the cabinet is on the wall.

Another object is to provide a new type of mounting and assembly for the measuring and/or takeup r011, wherein on of the stops of a stop mechanism is connected to a trunnion of the roll, which trunnion is journaled in a removable plate and which plate carries the stop mechanism, or a time-stop mechanism. Another object is to provide and so arrange a stop mechanism in relation to a driving mechanism for a pair of rolls, that the drive means is easily accessible by simple removal of a bearing plate on which the stop mechanism is mounted, the removal of said plate leaving the rolls substantially in their original position and conditioning them to be disengaged by axial movement from bearings which support their opposite ends.

Another object is to provide what may be termed a step-by-step timer-setting mechanism, and in that mechanism to positively prevent retrograde motion of a timer-setting element by positively locking this element and only allowing it to move at the end of the time period.

Objects, features and advantages of the invention will be pointed out in the description of the drawings, and in said drawings:

Fig. 1 is a side elevation of the inner section of a wall cabinet of the continuous type, with the cover fully open and showing one application of my invention, the mechanism being in normal condition as before dispensing is started;

Fig. 2 is a view similar to Fig. l but with the parts positioned as during the setting of the timer to prevent release of the stop mechanism, and with the rotative stop element about half way between its stopping and release positions;

Fig. 3 is a detail horizontal section taken on line 33 of Fig. 1;

Fig. 4 is a horizontal section on line 44 of Fig. 1 illustrating my new structure for mounting the stop mechanism and dispensing rolls;

Fig. 5 is a detail vertical section on line 5-5 of Fig. 1 illustrating the new timer construction; and

Fig. 6 is a face view showing the back-off structure for the stop mechanism.

The present device is applied to a type of cabinet known as continuous, in which strips of woven fabric toweling in roll form are dispensed, and in which a loop of toweling is formed below I roll -11.

the cabinet and in which the soiled toweling is taken up on a soiled towel roll at the same rate that toweling is dispensed or pulled out. It will be understood, however, that the present invention may be applied to cabinets for dispensing paper and to cabinets of various forms.

Referring first to Figs. 1 and 4. The numeral I represents an upright back wall or member, from the forward face of which extends two upright plates respectively designated 2 and 3 on which the dispensing mechanism of the cabinet is carried. These plates are preferably welded to the back plate I. The cabinet has a bottom 4 suitably removably secured in this case by angle-irons. Hinged as at 5 to this bottom 3 is a cover 6 which is adapted to be swung, from a position shown in Fig. 1, upwardly to entirely close the cabinet. When this cover is in the position shown in Fig. 1, all parts on the outer sides of the plates 2 and 3 are visible and are accessible for easy removal while the cabinet is on the wall. The back wall I is generall provided with keyhole slots (not shown) by which the cabinet can be hung on fastening devices on the wall.

Now referring to Fig. 4. Each of the plates .2 and 3 has an assembly opening 9 and each opening is covered by a bearing plate, the plates 7 being respectively designated ID, i I.

These plates lie'against the outside faces of the plates 2 and 3 and each is secured as at E2 by devices which can be quickly and easily detached. Each plate has two bearings designated i4 formed in any suitable manner but herein shown as having bearing liners held in inwardly punched portions of the plate. J ournaled in these bearings are a measuring roll 16 and a soiled towel takeup drive The drive roll has trunnions 58 arranged in the bearings as shown and the soiled towel takeup roll has trunnions l9 and 211. All trunnions' are held in the manner'of trunnion each having its end entering an opening in the end of the roll and being secured non-rotatably in that opening by means of a cross-pin 2!.

To the outer end of the trunnion 29 are attached two disks which form parts of a stop mechanism later to be described in detail. The means for attaching these disks and allowing their quick removal is a feature of this invention. The disks are respectively indicated 23,24 and each is mounted on a squared portion 25 of the trunr nion 20. A shoulder 26 is provided against which the inner disk 23 engages and the disks are held by a washer 21 through which passes a screw 28 as shown, the screw being threaded in to the trunnion. It will thus be seen that when the fastening-devices l2 and 23 are'removed, the plate ID and the disks 23 and 24 can be removed by a movement of the plate in an outward and axial direction with reference to the rolls. The bear ing-plate and stop-carrying structure can be applied as well to a single roll as in a paper dispensing cabinet.

There is also mounted on the'bearing plates '19 and II a bar 30 about which swings a plate also shown in dotted lines in Fig. 1. 3i separates the clean toweling on the pinch roll 32 from the soiled toweling on the soiled towel rollinot shown) which rides in slots'35 of plates 2 and 3. This plate normally rests, :during operation of the cabinet, upon the top of a pinch roll '32 which engages against 'towelin'g on the measuring roll 16. This pinch roll has trunnions The plate 7 4 39 when the plate I!) is to be removed. When this plate 10 is removed the rolls may remain held in their horizontal positions by means of their trunnions l8 and 19 of the plate II, or may be removed through the opening 9.

Another feature of this inventionis the arrangement of'drive means for the rolls adjacent and between the plate I0 and the ends of the rolls I6 and 11. The chain of this sprocketdrive means is indicated at 31 and one of the sprocket wheels is indicated at 38 and is immovably but detachably secured to the trunnion 20 by means of a pin 39. The other sprocket gear 49 is attached to the trunnion l8 in the same way.

The stop mechanism per se is not claimed herein, but represents one type of mechanism which may be used with this invention. Other types of stop mechanisms and time stop mechanisms may be completely carried on plate [0. The arrangement by which the stop mechanism is made detachable is a feature of this invention. The stop mechanism shown. at the outer sideof the journalplate i0 is of the type illustrated in Grunwald Patent 2,175,192. It represents, functionally, a form of stop which automatically releases when a pull on the toweling ceases. The disk 23 has a pin and also has a peripheral projection or segment 46 which provides at one end a stop shoulder 41. and also provides ashoulder 48. The segment 46 acts to swing a pivotal stop 49 about its pivot 50 so that a shoulder 5! lies in the path of the shoulder 4'! of the :segment 46.

In Fig. 1 the pivoted stop 49jis shown in open position. This kicking action by segment 46. is obtained as a result of rapid motion, in this instance of the 'takeup drive roll as operated through the sprocket chain connection by means of the measuring roll. The stop assumes stopping position .and when pulling action on the 'a disk .55 (see Fig. 4), is attached to asQua-red end of the trunnion I9.

This disk is attached in the same manner as the disks 23 and '24, so that it can be easily removed. The disk lies ,at

the outside of the removable bearing plate H.

and is removably held by the screw 56. Attached to the disk is a pin :51 pivoting alink '58 and to this link is attached a spring 59 also shown in dotted lines in Fig. 1. The opposite end .of the spring is secured by a pin to plate 3. The action of the spring and the disk is to positively separate the shoulders 4.7., 5| as soon as the user ceases to pull on the toweling. On this release the spring 59 reverses the movement .of the disks 23,124 and brings the pin 45 against a shoulder '60 of "a gravity-operable pawl 61 pivoted as shown at E2 to an upward extension 63 of the plate Ill; The pawlis. weighted .at its' lower end by an enlargement 6i": and, :its swinging movement to the right to release the pin 45 is limited by'a stop tit-punched from the upward extension 63. Thisextension '63 is spaced outwardly from the front face of the plate 10.

Mounted on the plate 40 is a new timer the construction fof'which per se isafeature ofthis invention. This timer is adapted in one phase of'the "invention to control t'he'rockable stop a plateifl which is in turn detachably secured by a fastening device TI to the :plate 113 so that his removed when the plate isremoved. The

plate is bent, as best shown in Fig. 5, to snugly engage over the upper edge of plate II] to prevent its rotation about the single fastening device H. The plate i0 has three forward shelflike extensions respectively designated 12, '53, M. The plate is cut away between the extensions 13, M to clear nut 3% of rod 39. On the extension I2 is mounted a vacuum cup '15, and means is provided by which air can be admitted to the cup through an opening 16 controlled by a needle valve (not shown) but adjustable by the thumb piece 11.

Now referring to Fig. 5. A cup i9 is mounted at the top of a square rod 80 and this rod is vertically arranged and slides in openings 8!, 82 respectively of plates 13 and 14. A proper amount of clearance is provided between these openings and the rod 89, as shown in a somewhat exaggerated manner in the drawing. These openings are preferably formed by punching the metal of the plates as shown to provide short dependent tubular extensions 84. Although not shown in the drawing, the corners of the square openings 81 are slightly rounded.

By having proper clearance and by arranging the openings vertically and the rod vertically, free gravity movement of the rod 89 is assured so that it will unfailingly move to its lowermost position without the use of a spring. At the bottom of the rod 89 is secured a spring arm 85 which normally lies as shown in Fig. 1 but which is moved to the position of Fig. 2 under conditions to be explained, to hold the stop 49 in stopping position, that is, to prevent its automatic movement to nonstopping position. This part 85 is suitably held by a small bracket 86, detachably held by a screw as show in Fig. 5.

To help to an understanding of the structural problems of timers used in relation to stop mechanisms for towel cabinets, and particularly problems relating to timers having either a single vacuum cup attachable to a plate or a pair of vacuum cups attachable to one another, some discussion of the prior types is given herebelow. The first timer of this type is disclosed in Birr Patent 2,215,953.

In practically all of the prior art timers of the vacuum cup type, one of the cup elements has been mounted on a plate and this plate has either been arranged to slide in a slot in another plate or has had a face of relatively large area flatly engaged against the face of another plate. These plates were guided by means engaging opposite edges, and the plates could rock and bind against the edge-guides. In most of these timers one of the cups is stationary and the other cup attached to its plate is automatically movable away from the stationary cup at the end of the timing period when the vacuum between the cups is broken or annulled. This movement should be free and unfailing and an unfailing movement has been heretofore obtained by the use of a spring. The use of such a spring involves provision of means for attaching the spring and, of course, the assembly of the spring. Therefore, although the plate arrangements are operable, there are involved frictional difiiculties which require the spring to overcome.

An object, therefore, of this invention is to so reduce frictional contact areas as to obtain a dependable gravity-operable device. This is accomplished herein by a new type of mounting for the lower movable cup in which friction is reduced to a minimum. Insofar as I am aware, no one has before conceived that a straight rod carrying a vacuum cup and slidable in two and only two vertically superposed slide bearings could be used successfully. Heretofore, it was necessary to use a spring to assure retraction and to overcome binding frictional efiects due to nonaligned bearings and/or to an excessive multiplicity of bearing points. When a plate was passed transversely through a slot of a slide therein, a certain amount of binding due to tipping occurred and the spring was required.

By providing a single vertically disposed straight rod of polygonal cross-section (to prevent rotation) and by freely slidably mounting that rod in only two vertically superposed openings of two plates, the area of frictional contact is so reduced that free sliding motion by gravity action only and without binding and without rocking is obtained. The bearings on the plate preferably have the form of very short and interiorly smooth tubes made by punching thin plates.

A feature per se and also in combination with the timer and stop mechanism above described is a mechanism now to be described. The mechanism is a unit separately mounted and timercontrolled. This mechanism is adapted to move the bar 80 of the timer to the position shown in Fig. 2 of the drawings to set the timer so that it will operate for a predetermined time period to prevent automatic opening of the stop arm 49. This mechanism is mounted on a separate plate 8? and it is a feature of this invention that the two parts of this mechanism are mounted on separate plates and that they are connected by a very simple connection which when detached allows independent removal of either plate. The plate 87 (see Fig. 1) is removably secured by fastening devices 83 in the form of screws. On this plate is mounted a rectangular frame 89 providing two elongated vertical sides and two horizontal shorter sides. These shorter sides are provided with pairs of openings respectively designated 9i! and 9|. In the openings 93 is slidably arranged a toothed bar 92 and slidable in the openings 9| is what will be referred to as a pawl bar 93.

It will be noted that bars 92, 93 are in parallel relation and that these bars, as well as the movable elements of the timers, all move in parallel relation and in this instance vertically. On the bar 92 are two sets of teeth an upper set 94 and a lower set 95. The upper set of teeth provides three shoulders, upper, intermediate and lower. To engage with these shoulders there is a pawl 96 suitably pivoted on the bar 93 and inoperably held as shown in Fig. 1 when the bar 93 is in its lowermost position. This bar 93 is pivotally connected by a link 9'! with the disk 26 by means of a pin 98 and as soon as the pin 98 is removed the plate Bl with its mechanism can be removed independently of the plate 59 with its mechanism, or plate Iii with its mechanism can be removed independently of plate 37.

The pawl 96 is held out by engagement with its lower end with a stationary member 99. Mounted on the plate 81 is a second timer which per se has the same structure as the timer of Fig. 5. The upper cup is indicated at Hill, the lower cup at I!!! and the setting bar is indicated Hi2. At the bottom of the bar I92 is a plate 593 (Figs. 1 and 3) which is adapted to be engaged by an arm I94 of the pawl bar 93, as shown in Fig. 2, during operation of the stop mechanism. The

en agement of 104 with lot brin s the. cup. 90

and I9! into vacuum-attached relation as shown teeth 95, which shoulders are enga ed by a pawl 96 pivoted as at I91 (see also Fig.3) to the plate 81.. The pawl lot is a. bent-out part of; a lever and this lever has an arm I98 at one side of its pivot which is engaged by the bottom of the plate element H33 of the timer bar Hi2 when that bar falls by gravity to the position of Fig. 1.. On such engagement the pawl E96 is held out; as shown. This is a feature of the invention, This. pawl also has a weighted arm at the opopsite side of its'pivot designated Hi3 which engages a stop shoulder HI to limit its upward movement and a stop shoulder IE2 to limit its downward movement. The stops HI and H2 are provided by a recess in an angle-iron H5 secured by a screw to the plate 8'! as best shown in Fig. 3;. The downward movement of the slide 92 is limited by a projection MB of plate 8.1. In thisinstance the lower guide i H for the rod [92 is part of a bracket 1 l8 secured to the plate 8'? as best shown in-Fig. 3.

It will be noted that the direction of motions of elements 89, 92, 93, and H92 are along lines which are parallel with one another. The. slide ,31 and the timer element 89 are aligned vertically and the top of slide 92 directly engages the bottom 89 of the movable timer lement to move it to timer-setting position. 93 engages the bottom of plate I93 so as to apply a vertical thrust to the timer-setting element H92 to move it to timer-setting position.

In this invention the timer control element 92 is positively and immovably heldin its advanced positions by means which is releasable by forceful action of a timer-setting element. Th set-- ting element isimmovab-ly held during the timing period but drops at the end of that period and positively trips the releasable means and holds said means in tripped position.

Operation timer moved to timer-set position, thus releasing the pawl E95 so that it is conditioned to engage the upper notch of the lower set of teeth 95 as I soon as the pawl has raised the bar 9-2 sufficiently,

as a result of rotation ofthe disk 26. The bar 92 is held immovably and positively by thepawl 699 while te bar 93; is lowered toits initialaposition preparatory to another upward feeding movement. The thumb'piece ll of the lower or second timer is so set that the timer bar I02 will not fall to release pawl 495 before the pawl 96: has engaged the next notch. It is a feature of the invention that this time interval. maybe varied.

During the next dispensing operation the pawl 96 engages the second or. intermediate notchofithe upper set, and againadvances the bar 92;. On the-third operation of the stop mechanism. the pawl 99 engages the third. or. lowest notchof the The arm I94: of slide" upper set and. causes the upper end-of the bar 92'. to engage the lower end of they bar 89 and set the timer. Th parts are now positioned as in Fig. 2. in

which the disks Z3. and 24 have onlymade about one-half of their total revolution, After this movement is completed, and as dispensing con tinues, bar 93 is lowered and its pawl 96 releases the bar 9-2, At, the end of the timing action of timer E90, IEH bar Ill-Z. falls to the position of Fig-1 to trip pawl tilt. Release of timer Hill, I0 I occurs beiore release of timer l5, 19 so that the upper end of bar 92 will permit free falling of barBfl when stop. 15;, 19' opens. The stop 49 is now held closed by the spring and the cups [5 and 19 are vac.- uum-attached and the timer isoperating. The stop 4-9 will 'be so held until. the cups of the upper timer separate.

This timing interval for the lower timer is based. on the expected interval betweendispensing operations by the user. This particular phase of the invention relates to the question of economizing the toweling. A short length is delivered on the first operation and if the. user wants more toweling he can immediately get another section of the same length and thecombined. lengths will; provide enough toweling for the face. If he wishes more toweling for the; face he canget another length. immediately, but thereafterhewill have to wait a time period before any more toweling can be obtained. Sudden stopping of the dispensing roll by engagement of the shoulder 4-1 with the shoulder 5!: of the lever All-gives the user the impression, that he cannot get more-toweling, but if he ceases to pull on the toweling the stop will. automatically open and hecan get another length. The timing interval of the second timer is set in relation to the'expected time intervals between, pulling by the user, and the object-of the second timer isto hold the element 92 in; its advanced; position until the user pulls a second length, that is; until the element 93. is: moved by dispensing to its initial position. and then moves slightly forwardly so that the pawl. 96 engages anotch of the member 92. r

I believe myself the first to control in any way a and for any purpose, by means of towel. dis'-.

pensing action, two or more timerseach of which has a partadaptedtomove. from an initial position. to set the: timer and. thereafter remain immovably held by timer action during the-timing period, and which is automatically released at the end of the-time periodto automatically move to initial position.

By means of the new type of timer herein, where it is desired to set onetimer after a certain. element has moved to a given position: as. a result of a series of small. movements; that element can be immovably held against retrograde motion for. any time-period desired. Because both ofy'the timing periodsof. these timers can be var.-

ied; the. use of two of; them permits of alarge 7 number of different timing. relations between them, that; is, diiferentialf timing relations. This allows many uses of'thesetwotimers inrelation to. astop-mechanism of any suitable type.

The arrangement of somev partsrononezplate V and other parts on a second. plateis new in this art. and. allows either part to; be separately as,- sembled, and allows. either to lee-removed ind'e pendently of the other for-repair or adjustment.

It is; also new to mount thetimer. 15., .19, as

it is only necessary to enlarge or change the shape of the bearing plate to admit of mounting such a stop mechanism thereon, and in such a case as in the present case, one stop of the stop mechanism is suitably detachably secured to the other end of the trunnion of the corresponding roll. Insofar as the use of the plate with the stop mechanism thereon is concerned, this device may be used on paper as well as cabinets of the continuous type.

What I claim is:

1. A stop mechanism and a timer therefor, means movable by a step-by-step motion by said stop mechanism to set the timer, including a pawl which holds a timer-setting part against retrograde motion, and a second timer adapted to be set by said stop mechanism and having a part which trips said pawl as soon as timing action of said second timer is completed.

2. A stop mechanism and a timer therefor, means movable by a step-by-step motion by said stop mechanism to set the timer, including a ratchet bar and a pawl which holds a timer-setting bar against retrograde motion, and a second timer adapted to be set by said stop mechanism and having a part which trips said pawl as soon as timing'action of said second timer is completed.

3. A stop mechanism adapted to be brought to stop position on forcible rotation of a roll and to be automatically released on cessation of application of force to the roll, a first timer adapted to prevent automatic release of the stop-mechanism, means operable by the stop mechanism by step-by-step motion to set the timer, including a pawl, a, second timer having a timer-setting part which is moved to setting position and remains immovable thereat during timer action and which is adapted to trip the pawl at the end of the timing period, and means operable by the stop mechanism for moving the part to timer-set position for every step-motion.

4. A device of the class described, comprising first, second, third and fourth elements, each adapted to be moved from an initial to a final position, a stop mechanism and means by which it operates the first element to move the same from initial to final position and back again to initial position each time that the stop mechanism is operated, means for separately holding the third and fourth elements immovable at their final positions for a predetermined time period, said second element being adapted to move the third element to final position during its movement to its final position, means movable by the third element to prevent release of the stop when the said third element is in its final position, means on the first element for moving the fourth element to final position as the first element moves to final position, means by which the first element moves the third element to final position only after a plurality of operations of the stop mechanism, releasable means for holding the second element immovable while the first element moves from its final to its initial position, and means operable by the fourth element for rendering the holding means inoperable when said fourth element is in initial position.

5. A device of the class described, comprising first, second, third and fourth parallel and slidable elements, each adapted to be moved in the same direction from an initial to a final position, a stop mechanism and means by which it operates the first element to move the same from initial to final position and back again to initial position each time that the stop mechanism is operated, means for separately holding the third and fourth elements immovable at their final positions for a predetermined time period, said. second element being adapted to move the third element to final position during its movement to its final position, means movable by the third element to prevent release of the stop when the said third element is in its final position, means on the first element for moving the fourth element to final position as the first element moves to final position, means by which the first element moves the third element to final position only after a plurality of operations of the stop mechanism, releasable means for holding the second element immovable while the first element moves from its final to its initial position, and means operable by the fourth element for rendering the holding means inoperable when said fourth element is in initial position.

6. A device of the class described, comprising first, second, third and fourth elements, each adapted to be moved from an initial to a final position, the second, third and fourth elements being movable by gravity to their initial positions, a stop mechanism and means by which it operates the first element to move the same from initial to final position and back again to initial position each time that the stop mechanism is operated, means for separately holding the third and fourth elements immovable at their final positions for a predetermined time period, said second element being adapted to move the third element to final position during its movement to its final position, means movable by the third element to prevent release of the stop when the said third element is in its final position, means on the first element for moving the fourth element to final position as the first element moves to final position, means by which the first element moves the third element to final position only after a plurality of operations of the stop mechanism, releasable means for holding the second element immovable while the first element moves from its final to its initial position, and means operable by the fourth element for rendering the holding means inoperable when said fourth element is in initial position.

'7. A device of the class described comprising, first and second slides adapted to be moved from an initial position, the second slide having first and second sets of ratchet teeth, a first pawl on the first slide adapted to engage the first set of teeth to advance the second slide, a second pawl adapted to engage the second set of teeth to prevent retrograde motion of said second slide, a stop mechanism adapted to open automatically on cessation of application of force, a first timer having a part movable from an initial position to set it and adapted to remain immovable during timer action, said part having means for preventing automatic opening of said stop mechanism during timer action, and said second slide being adapted to set said timer only after a predetermined degree of motion, a second timer having a part movable from an initial position to set it and adapted to remain immovable during timer action, means by which the first slide moves said part of said second timer to set said timer every time that the stop mechanism is operated, said part of said second timer having means to hold the second pawl in inoperative position when said part of the second timer is in its initial position, and means for holding the first pawl in 1 l inoperative position when the first slide is in initial position.

8. A device of the class described comprising, a rectangular frame, first and second slides arranged inside of the frame in parallel coplanar relation and guided in upper and lower openings of the frame, each slide adapted to be moved by gravity to an initial position, the second slide having upper and lower sets. of ratchet teeth, a first pawl on the first slide adapted to engage the upper set of teeth to advance the second slide against the action of gravity, a second pawl adapted to engage the lower set of teeth to prevent retrograde gravity motion of said second slide, a timer adapted to be set and having a part movable against gravity from an initial position for that purpose, means by which the first slide moves said part to set the timer when the first slide moves upwardly, said part having means to hold the second pawl in inoperative position when said part is in its initial position, and means for holding the first pawl in inoperative position when the first slide is in initial position.

9. A device of the class described comprising, two upright plates, a dispensing mechanism arranged between the upright plates, including a roll which is moved'when dispensing occurs, a first mount plate releasably secured to the outer side of one of the upright plates, a stop mechanism on said mount plate including a stop which is releasably secured to the'outer end of a trunnion of the roll which projects through said mount plate, a second mount plate detachably secured to the outer face of the same upright plate, a mechanism on said second plate adapted to be controlled by the stop mechanism of the first mount plate, including an operating link which can be easily detached to separat the two mechanisms and thereby allow separate removal of either mount plate with its mechanism.

10. A device of the class described comprising, two upright plates,'a dispensing mechanism arranged between the upright plates, including a roll which is moved when dispensing occurs, a first mount plate releasably secured to the outer side of one of the upright plates, a stop mechanism on said mount plate including a stop which is releasably secured to the outer side of 'a trunnion of the roll which projects'through said mount plate, a timer for the stop mechanism also carried by said first mount plate, a second mount plate releasably secured to the outer face of the same upright plate, a'timer-controlled mechanism on said second mount plate adapted to control the timer of the first mount plate, and an operating connection between the stop mechanism and the timer-controlled mechanism, comprising a link which can be easily detached to separate the two mechanisms and thereb allow separate removal of either mount plate with its mechanism.

11. A device of the class described comprising, an inner wall section composed of two upright plates and an outer section as a complete cover for and hinged to the inner section and adapted to be moved to an open position which will expose the entire outer surfaces of the upright plates, a dispensing mechanism arranged between the upright plates, including a roll which is moved when dispensing occurs, a first mount plate releasably secured to the outer side of one of the upright plates, a stop mechanism on said mount plate including a stop which is detachably secured to the outer end of a trunnion of the roll, which trunnion projects through said mount plate, a timer for the stop mechanism also carried by said first mount plate, a second mount plate releasably secured to the outer face ofthe same upright plate, a timer-controlled mechanism on said second mount plate adapted to-control the timer of the first mount' plate, and an operating connection between the stop mechanism and said timer-controlled mechanism, comprising a link which can be easily detached to separate the two mechanisms and thereby allow separate removal of either mount plate with its mechanism.

12. A device of the class described comprising first, second and third elements each adapt'edto be moved from an initial to a final position, means for separately holding the third element immovable at its final position for a predetermined time period, means for releasably holding the second element at a pluralityof diiierent positions btween its initial and final positions, means by which th first element moves the third elementto final position as the first element moves to final position, means by which the first element moves the second element to final position only after a plurality of operations of: the first sic merit from initial to final position and return to I initial position, and means operable the third element for releasing the'holding means ior'the second element when said thirdelement is in initial position;

13. A device of the class described comprising, two upright plates, a dispensing mechanism airranged between the upright plates, including a, roll which is moved when dispensing occurs, an opening in one of the upright plates through which the roll can be removed, a mount plate releasably secured to the outer side of said upright plate and closing the opening, and astop' mechanism carried by said mount plate including a stop which is releasably secured to .the outer end of a trunnion of the roll which projects through said opening and is journalled in saidmount plate. V

14. A device of the class described comprising, a pair of spaced upright plates, e-ach'having an opening, the said openings being in the same horizontal plane, a pair of rolls extending between the plates and connected by drive gearing, the said openings being of such size as to allow withdrawal through the openings of the rolls with the I drive gearing intact, each-roll having J'ourna'lling; trunnions, a bearing plate for and capping each opening and detachably secured at the outer side of the corresponding upright plate, each bearing plate having bearingreceiving'the trunnions of the rolls so that the plates can by outward motion be detached from the trunnions at one end leaving the rolls with the trunnions at their opposite ends in j-ournalling relation with the corresponding journals of the other journal 'plate, the said drive gearing being arranged between the ends of the rolls and one of the plates'and :being in part detachably secured to the trunnion of the rolls, whereby the drive gearing is accessible when the bearing plate is removed, and a stop mechanism carried at the outside of that plate which is near the drive gearing, the said stop mechanismhavinga stop element which is detachably connected to one of the trunnions' by means of a screw so that on rem-oval of the screw that part of the stop mechanism can be withdrawn with the other part of the stop mechanism when the plate is moved outwardly.

15. A device of the class described comprising, a stop mechanism, a set-table first timer adapted when set to prevent .openingof the stop mechanism until the end of its timing period, first and second movable elements, the second adapted to set the first timer, means by which the first element advances the second element toward timersetting position for each movement of the stop from open position to closed position, means by which the stop operates the first element to obtain a step-by-step advance of the second element toward timer-setting position, latch means adapted to positively hold the second element against retrograde motion after advance by the first element, a second timer adapted to release said latch means at the end of its timing period, and means on the first element for setting the timer during operation of the stop mechanism.

16. A device .of the class described comprising, a stop mechanism, a settable first timer adapted When set to prevent opening of the stop mechanism until the end of its timing period, first and second movable elements, the second adapted to set the first timer, means by which the first element advances the second element toward timersetting position for each movement of the stop from open position to closed position, means by which the stop operates the first element to obtain a step-by-step advance of the second element toward timer-setting position, latch means adapted to positively hold the second element against retrograde motion after advance by the first element, and a second timer adapted to release said latch means at the end of its timin period, and means on the first element for setting the second timer during operation of the stop mechanism, both timers including an element which is moved from an initial position to set the timer and which remains immovable during the timing action and then drops by gravity at the end of a timing period to the initial position.

17. A device of the class described comprising, a stop mechanism, a settable first timer adapted when set to prevent opening of the stop mechanism until the end of its timing period, first and second movable elements, the second adapted to set the first timer, means, bywhich the first element advances the second element toward timer-setting position for each movement of the stop from open position to closed position, means by which the stop operates the first element to obtain a step-by-step advance of the second element toward timer-setting position, latch means adapted to positively hold the second element again-st retrograde motion after advance by the first element, and a second timer adapted to release said latch means at the end of its timing period, and means on the firs-t element for setting the timer during the operation of the stop mechanism, both timers including an element which is moved in the same direction from an initial position to set the timer and which remains immovable during the timing period and then can drop by gravity at the end of a timing period to the initial position.

RUDOLPH G. BIRR.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Country Date 2,175,192 Grunw-ald Oct. 10, 1939 2,299,729 'Birr Oct. 27, 1942

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