US792815A - Automatic shoe-polishing machine. - Google Patents

Description

PATENTED JUHE 20, 1905.

SLM; OOHN.

AUTOMATIC SHOE POLISHING MACHINE.

A PPLIGATI ON FILED OUT. 7,1904.

8 SHEETS-SHEET 1.

6b QZWZZZ/ZJ/Z m Inventor.

b I I Httomegs No. 792,815. PATENTED JUNE 20, 1905. S. M. (JOHN.

AUTOMATIC SHOE POLISHING MACHINE.

APPLICATION FILED 0017,1904.

8 SHEETS-SHEET 2.

Witnesses 6% Httomegs N0. 792,815. PATENTED JUNE 20, 1905.

S. M. GOHN.

AUTOMATIC SHOE POLISHING MACHINE.-

APPLIOATION FILED 00T.7,1904.

s SHEETS-SHEET 3.

Httomegs 8. M. OOHN.

AUTOMATIC SHOE POLISHING MACHINE.

APPLIOATION FILED 0017,1904.

M" WHWHIIW Witnesses PATENTED JUNE 20, 1905.

a SHEETS-SHEET 4.

Hctomegs No. 792,815. PATENTED JUNE 20, 1905. S. M. GOHN.

AUTOMATIC SHOE POLISHING MACHINE.

APPLICATION FILED OCT. 7,1904.

I s SHBETSSHEET 5.' mo /63 wltnesses Inventor.

Httomegs No. 792,815. PATENTED JUNE 20, 1905.

S. M. GOHN.

AUTOMATIC SHOE POLISHING MACHINE. APPLIOATION FILED 0017,1904,

s SHEETS-SHEET 6.

I s 12% v I 1 A? A X/ WA @M jZ a I Inve tor,

Attorneys No. 792,815. PATENTED JUNE 20, 1905. S. M. GOHN.

AUTOMATIC SHOE POLISHING MACHINE.

APPLICATION FILED OUT. 7,1904.

8 SHEETS-SHEET 7.

I may /44 //;99 /4 Witnesses l e or.

Httomegs PATENTED JUNE 20. 1905.

S. M. GOHN.

AUTOMATIC SHOE POLISHING MACHINE.

APPLICATION FILED OCT. 7,1904.

8 SHEETS-SHEET 8.

Witnesses ing broken away in order Patented June 20, 1905.

' UNITED STATES PATENT OEEicE.

SIGMUND MORTON COHN, OF PORTLAND, OREGON.

AUTOMATIC SHOE-POLISHING MACHINE.

SPECIFICATION forming part of Letters Patent No. 792,815, dated June 20, 1905.

Application filed October 7, 1904. Serial No. 227,566.

Oregon, have invented a new anduseful Automatic Shoe-Polishing Machine, of which the following is a specification.

This invention relates to shoe-polishing machines, and has for its principal object to provide an improved mechanism for automatic ally-blackening and polishing shoes and boots.

With this and other objects in View, as will more fully hereinafter appear, the invention consists in certain novel features of construction and arrangement of parts hereinafter "fully described, illustrated in the accompanying drawings, and particularly pointed out in the appended claims, it being understood that various changes in the form, proportions, size,

and minor details of the structure may be made Without departing from the spirit or sacrificing any of the advantages of the invention.

In the accpmpanying drawings, Figure 1 is a perspective view of a shoe-polishing machine constructed in accordance with the invention,

a portion of the front of the casing being re- 'moved. Fig. 1 is a similar view of a portion of the casing. Fig. 2 is a detail perspective View of the operating parts of the machine,

all of the casing with the exception of the Fig. 3 is a side left of Fig. 2. Fig. L is a rear elevation of the mechanism, the back of the casing being removed. Fig. 5 is a sectional plan view of the machine on the line 5 5 of Fig. 4. Fig. 6 is a transverse sectional elevation of the lower portion of the machine on the line 6 6 of Fig.

4. Fig. 7 is a side elevation, on an enlarged scale, of the mechanism by which the opera- 'Fig. 10 is a sectional elevation illustrating the constructionand mounting of the revoluble brushes for engaging the toes of the shoes. Fig. 11 is a detail perspective view of the coin controlled circuit closing mechanism shown on a smaller scale in Fig. 1. Fig. 12 is a detail perspective view illustrating the pivotal mounting of the brushes.

Similar numerals of reference are employed to indicate corresponding parts throughout the several figures of the drawings.

The machine forming the subject of the present invention is of such character that it may be of the coin-controlled class or may be set into operation by simply pressing a button or other starting device, and after once started into operation the blacking is automatically applied and the shoes polished Without further effort on the part of the operator, the various movable parts being stopped after a complete cycle of operations in predetermined position in readiness for another operation.

The various working parts of the apparatus are arranged in a suitable casing 10, as shown in Fig. 1, and in the base portion of the casing are openings 11, through which the shoes may be inserted, asuitable stoolor chair being placed in front of the machine for the convenience of the customer. If the machine is of the coin-controlled type, a coin is inserted through slot 13 (shown in the removable panel 14 of Fig. 1) and passed to the trol of a suitable push-button or other suitable mechanism. The base 16, forming the bottom of the casing, also serves as asupport for a plurality of vertical standards 17, which may be formed of metal tubing, and at the top of these standards is placed a shelf or platform 18, on which is mounted a motor 15. The platform is provided with a pair of standards 19, forming supports for a counter shaft 20, that extends transversely of the machine, and at a point above the counter-shaft is a second shaft 21, that preferably is supported by hangers 22, depending from the top of the casing. The armature-shaft 23 of the motor is provided with a grooved pulley 2a which and a belt-wheel 25, the former being connected by a belt 26 to a pulley 27 to the shaft 20. The shafts 20 and 21 are connected by a belt 28 passing over suitable pulleys on the shafts.

The base-plate is provided with a pair of sills 30, on which are placed rails 31 for the support of a wheeled carriage 32. The carriage is provided with a platform 33, on which is arranged a pair of standards 34, that are connected at their upper ends by a recessed cross-bar 35, and the carriage as a whole is moved toward and from the front of the machine by means of a crank 37, mounted on an operating-shaft 38 and connected bya link 39 to the platform. The platform is provided with a pair of parallel slots 40, through which extend posts 41, forming supports for footblocks 42, on which the shoes are placed during the blackening operation, the shoes remaining stationary, while the platform reciprocates and carries the polishing-brushes over the shoe.

The blacking to be applied to the shoes is preferably made up in liquid form and poured into suitable reservoirs 43, 44, and 45, the reservoirs 43 and 44 applying the blacking to the heels and rear portions of the sides of the shoes, while the reservoir 45 supplies blacking to the toes of said shoes. Secured to the base-plate are a number of standards 47, 48, and 49, and each of these standards forms a support for a blacking-supply nozzle 50, that is connected to one of the blacking-reservoirs.

.Some of these nozzles are supplied directly from reservoirs through small flexible tubes 51, as shown in Fig. 2, while others are supplied through fiexible tubes 52, leading from a transversely-disposed pipe 53, that is connected to both of the reservoirs 43 and 44. The nozzles carried by the supports 47 are placed in direct alinement with the longitudinal centers of the foot-blocks and are designed to supply blacking directly against the heel of the shoe, while the nozzles carried by the standards 48 and 49 supply blacking to the sides of the shoes. In order to discharge the blackingthrough the nozzles, an air-pump 52 is employed, this being in the form of an ordinary bellows, and from the bellows leads an air-supply pipe 53, that is connected by a plurality of tubes 54 to air-nozzles 55, disposed immediately over the blacking-nozzles 50, and so long as the air is forced through the pipe 53 the blacking will be sprayed on the rear portions of the shoes. The arrangement of the atomizers will be rendered more clear on reference to Fig. 9, which is partly in the nature of a diagram. This figure shows the rear supply pipe 53 provided with a valve 54, that is under the control of the operating mechanism and is closed at a certain time. The valve 54 is operatively connected to valve 55, that is placed in a pipe 56, connected to the pipe 53 or directly to the bellows; but said valve 55 is normally closed,

so that no air passes through the pipe 56, all of the air during the spraying operation taking the course indicated by the full-line arrows in Fig. 9; but after the atomizing operation is completed the valve 54 is closed and the valve 55 is .open, so that the air will then take the course indicated by the dotted arrows for a purpose hereinafter described.

Leading from the reservoir 45 are tubes 57, that support spraying-nozzles 58, that are arranged directly in front of the toes of the shoes, as will be seen on reference to Fig. 6, and extending over these nozzles are air-jet nozzles 59, that are connected to the pipe 53, the air-pipe being designated by the same reference character throughout its entire length in order to avoid confusion. A portion of the air passing through the pipe 53 will be discharged through the nozzles 59 and cause blacking to flow through the nozzles 58 and be discharged in the form of a spray on the toes of the shoes.

At a point in front of the foot-blocks 42 are arranged air-nozzles 60, that are connected, through the medium of the pipe 61, to the normally closed air-pipe 56, and when the atomizing operation ceases through the closing of the valve 54 the valve 55 will be immediately opened and the air will be diverted from pipe 53 through the pipe 56 and will thence pass through the pipe 61 to the nozzle 60, so that a current of air will be directed against each of the shoes and tend to evaporate the blacking and to dry the brushes, this being found to materially assist in the polishing operation.

At one side of the frame is arranged a support for a crankshaft 63, having at one end a belt-wheel 64, connected by a belt 65 to a pulley 66 on the counter-shaft 20. The crankshaft carries a crank 67, connected by a pitman 68 to the movable upper portion of the bellows 52 and serves as a pulling means for said bellows, the latter operating continuously from the starting to the stoppage of the motor 15.

The platform 33 of the carriage is provided with bearings for the reception of a plurality of shafts 70, the shafts extending directly through the brackets 71 on the platform and carrying brushes 7 2 at their upper ends,while the lower ends of the shafts are provided with sheaves 73. In the present instance four of these vertical brush-shafts are used, each carrying a brush, so that there will be two brushes for contact, respectively, with the opposite sides of each shoe. The frame of the carriage is further provided with bearings for I the reception of horizontally-disposed shafts 74, on which are mounted brushes 75 for contact with the sides of the shoes, and all of the brushes have rounded end portions to facilitate engagement with said shoes. At the rear end of each shaft 74 is secured a pair of pulleys 76 77, the pulley 76 being of practically the The frame of the carriage is further provided .With a standard 86, from which projects a pair of stationery spindles 87, carrying toe-brushes 88, the hub portions of the brushes being pro- :vided with pulleys 89, that are connected by belts to driving-pulleys 91 on the shaft 83,

and as these toe-brushes are subjected to more or less severe friction which would tend to stop their rotative movement the belts 90 are held taut by spring-pressed tightening-pulleys 93, hung on. links 94 and pressed into 25,

engagement with the belts by fixed springs 95, as will be' seen more clearly on reference to Fig. 6.

The shaft 38, previously referred to, is mounted in suitable bearings carried by the base of the apparatus, and running loosely on said shaft 38 is a pair of belt-wheels 96 97 and a friction-disk 98, these three members being connected rigidly together, but traveling independently of the shaft. The pulley 97 is connected by a belt 99 to a main pulley 25 on the armature-shaft, so that pulley 97 will be driven continuously from the starting to the stopping of the motor. The pulley 96 is connected by a belt 100 to a pulley 101 on the shaft 83 and serves as a means for transmitting movement to all of the brushes. In order to permit free reciprocation of the carriage without slackening the belt 100, a takeup or tightener pulley 102 bears against the belt 100. This take-up pulley is carried by a yieldable arm 103, that is connected by a spring 104 to the fixed frame of the machine, the spring yielding as the carriage moves to and fro and serving at all times to keep the belts sufiiciently taut to insure the necessary rotative movement of the shaft 83. It will thus be observed that all of the brushes rotate continuously from the starting to the stopping of the motor.

To the shaft 38 is rigidly secured a sprocketwheel 106,thatis connected by a link belt 107 to a small sprocket-wheel 108, carried by ashaft 109, the latter being supported by suitable supports 110, carried by the base-plate. (See Fig. 3.) To the shaft 109 is further secured a belt-wheel 111, that is connected by a belt 112 to a pulley 113 on a shaft or stud 114.

The shaft or stud 114 is carried at the outer end by one end of an arm 115, the opposite end of said arm being pivoted to a stud 116,

carried by the base-plate. Secured rigidly to the pulley 113 is a friction-wheel 117, that may be moved into contact with the frictiondisk 98, and when this occurs movement of the disk 98 is transmitted through the: friction-wheel 117 to the pulley 113 and from thence to belt 112, to'belt-wheel 111, sprocketwheel 108, link belt 107, to sprocket-wheel 106. This turns the shaft 38, and the crank 37 thereupon starts to reciprocate the brushsupporting carriage. This movement, how ever, must not occur until after the atomizers have ceased to operate, and until that time the brushes do not make contact with the shoes. The two friction members are therefore held out of contact by a spring 120, Fig. 3, that is connected to a link 121, the lower end of the link having a pivotal connection with the arm 115. In Figs. 3 and 7 the parts are shown with the two friction-disks in contact.

To one side of the main supportingframe is secured a plate 125, in which are formed bearings for a plurality of parallel shafts 126, 127, and 128. These are connected by a train of gearing 130, 131, 132, and 133. (Best shown in Fig. 7.) On the shaft 126 is secured a belt-wheel 134, that is connected by a crossbelt 136 to a pulley 137. The pulley 137 is secured to a shaft 138, adapted to suitable bearings carried by the frame, and to said 95 shaft is further secured a belt-wheel 139, that is connected by a belt 140 to a pulley 141 on the shaft 21. (See Fig. 4.) It will be observed that the relative diameters of the pulleys and gearing are such that the shaft 128 will be driven at comparatively slow speed, and it is intended that this shaft shall make one complete revolution for each operation of the machine, and while such operation may last for any desired period it is found in practice that one minute is ample. This shaft 128 is the controlling member and governs the period of operation of the atomizers, the starting of the reciprocation of the brushcarriage, and the stopping of the motor.

On the shaft 128 are secured two cam- disks 143 and 144. ()n the periphery of the disk 143 is a depressed portion 145, and a similar depression 146 is formed in the disk 144, the two depressions being at points diametrically opposite each other. From the plate projects a stud 147, on which is pivoted a lever 148, having a toe 149, that rides on the periphery of the cam 143. The opposite end of the lever is connected toa valve-operating rod 150, that is suitably connected to both of the valves 54 and 55. The connection to the valve 54' is through the intermediary of a small lever 151, centrally pivoted to a bracket 152 (see Fig. 9) and connected at one end to the rod 150, the opposite end of said lever having an enlarged head that bears against the controlling-stem of the valve 54. The connection with the valve 55 may be directly with the stem of the latter; but care must be taken to insure closing movement of one valve and simultaneous opening of the other. The initial position of the parts is shown in Fig. 7, and the shaft 128 turns clockwise, as indicated by the arrow, and during all the time the toe 149 is in the depression valve 54 will be opened and valve 55 will be closed, so that the air will pass from the air-compressor to the atomizers and spray the liquid blacking on the shoes. When the end of the depression is reached, the toe is forced upward and thence continues to ride on the periphery of the cam-disk until the latter again stops in the position shown. As soon as the toe is moved out of the depression valve 54 is closed and the action of the atoniizers ceases, while the valve 55 is opened and the airblasts are directed against the toes of the shoes in order to assist in the polishing operation.

To the plate 125 is secured a stud 154, to which is pivoted a lever 155, having a toe 156, that rides on the cam-disk 144 and normally is seated in the depression 146. The lever 155 is connected. by the link 121 to the arm 115, so that during the time the toe is in the depression the spring 120 will elevate the friction-wheel 117, holding the latter from engagement with the friction-disk 98, and the two toes 149 and 150 will simultaneously move from said depressions 145 and 146. When, therefore, the valve 54 is closed by the raising of the lever 133, the toe 156 will be moved out of its depression on the main periphery of the cam-disk144 and lever will be depressed. This movement will be transmitted, through the link 121, to the arm 115, and friction-Wheel 117 will engage the friction-disk 98, and thereby start the reciprocatory movement of the brush-supporting carriage, the carriage continuously reciprocating until the parts have again assumed the position shown in Fig. 3. As soon as the lever 155 is depressed it is locked in depressed position by a small rocker-arm 158, carried by a rockshaft 159, that extends through an opening in the plate 125. To the inner end of the rockshaft 159 is secured an arm 160, to which is secured one end of a spring 161, the opposite end of the latter being held by a pin or stud 162. This spring acts, through the arm 160 and rock-shaft 159, to hold the small rockerarm 158 against the end of the lever 155; but as soon as the latter is depressed the spring will cause the rocker-arm to move over the top of the lever 155, and thus lock the same in the depressed position and hold the friction-wheel in engagement with the frictiondisk 98.

To the upper end of the arm 160 is connected a slidable rod 163, the outer end of which is slotted for the reception of a guiding-pin 164, carried by one of the standards 17. Projecting from the arm 163 is a lug 165, adapted to be engaged by a small bracket 166, projecting from one of the vertical bars 34 of the movable carriage. The brush-supporting carriage reciprocates a predetermined number of times at each operation of the machine. As the limit of rearward movement is approached the bracket 166 engages the lug and moves the bar 163 endwise. This moves the small rocker-arm 158 out of engagement with the lever 155, and springs 120 will first act to force the toe 156 into the depression 146, the disk 144 having by this time arrived at a point where the toe may enter said depression. It will be noted that the depression 146 is somewhat longer than the depression 145, so that the toe 156 enters this depression in advance of the entrance of the toe 149 into the depression 143. This movement results in disconnection of the Friction-wheel 117 and frictiondisk 98 somewhat in advance of the stoppage of the movement of the train of gears.

The machine shown in the present case is designed to be operated by the insertion of a coin, the terminals of the operating-circuit being so arranged that when a coin is properly inserted the circuit will be closed through said coin.

In alinement with the coin-slot 13 at the front of the machine is a chute 170, leading to a vertically-disposed trough 171,said trough forming one of the terminals of the circuit and being electrically connected to the leading-in wire 172. Immediately over the trough is an arm 173, having at its upper end an integral cross-bar 175, that is pivoted at 176 to a base-plate 177, that preferably is formed of insulating material. The arm is further guided by a cross-bar 178, supported by a pair of blocks 179, and from these blocks extend springs 180 to the cross-bar 175, tending normally to hold the parts in the position shown in Fig. 11. The arm 173 is electrically connected to a wire 181, leading to the starting-rheostat, the electrical connections forming no part of the present invention and being merely illustrated in diagram in Fig. 4. Thus, for instance, the connections operated by the insertion of the coin may simply close the local circuit through the solenoid to the starting-rheostat, or it may close the main motor-circuit, the solenoid of the rheostat being arranged in series or shunt in the main line.

From the free end of the arm leads a flexible cable or chain 185, the upper end of which after passing over the guiding-sheave 187 is connected to an arm 188, projecting from a vertically-disposed rock-shaft 189. This rock-shaft is provided at its lower end with an arm 190, disposed in the path of movement of the pin 191, projecting from the gear-wheel 133, and the parts are so positioned that as the gear-wheel133 approaches its position of rest the pin 191 will engage the arm 190 and rock the shaft 189. This movement will be transmitted, through the arm 188 and flexible cable 187, to the coinholding arm 173, and the latter will move to the insertion of a suitable coin, and on the armature-shaft revolving movement is transmitted, through the belting connections and shafts, to the bellows 52. At this time the valve 54 is opened and valve 55 is closed, so that the current of air passes through the pipe 53 and all of the atomizers are actuated, forcing sprays of blacking over the surface of the shoes. At the same time movement is transmitted, through the belt 99 and belt- Wheels 97 and 96,to belt 100 and thence through belt-wheel 101 and shaft 83 to the several belts which operate the brushes. So long as the toe 149 continues in the depression valve 54 will be held open and the spraying of blacking will continue, and during this interval the toe 156 will remain in the depression 146 and the friction-wheel 117 will be held from engagement with the friction-disk 98. As soon as the cam-disks have returned to an extent sufficient to force the toes 14:9 and 156 out of their respective depressions the valve 54: will be closed and valve 55 will be opened. The atomizers will then cease work and air will be diverted through the pipe 56 to the pipe 61 and thence through the nozzles 60, the current of air being directed against the front portions of the shoes and serving to evaporate the liquid blacking of both the shoes and the brushes, so that the latter will be maintained in the comparatively dry condition essential for polishing. The depression of the lever causes the friction-Wheel 117 to engagethe friction-disk 98, and as thelatter is constantly revolved the friction-wheel 117 is turned and its movement is transmitted, through the pulley 113 and belt 112, to belt-wheel 111. This turns the small sprocket-gear 108, and the movement is transmitted through the link-belt 107, sprocket- Wheel 106, and shaft 38. The crank 37 then starts the slow reciprocatory movement on the carriage. The brushes are thus forced into contact with all portions of the surface of the shoes to be polished, and the polishing operation is both thorough and rapid. The operation continues until as the carriage nears the limit of its downward movement bracket 166 rides against the lug and acts, through bar 163 and arm 160, to unlock the lever 155.. This insures stoppage of the car-' riage in its rearmost position. At the same time pin 191 engages rockerarm 190, and through the vertical rock-shaft 189 and flexible cable breaks the circuit and stops the parts in proper position in readiness for a subsequent operation.

Having thus described the invention, what is claimed is 1. In a shoe-polishing machine, a foot-rest, atomizers for spraying liquid blacking, polishing-brushes, and means for directing jets of air against the shoes and brushes to evaporate the blacking and maintain the brushes in a dry condition.

2. The combination in a shoe-polishing machine, of blacking-atomizers, a plurality of polishing-brushes, and means for directing jets of dry air against the shoes and brushes continuously during the polishing operation, thereby to evaporate the moisture in the blacking and maintain the brushes in a dry condition.

3.- In a shoe-polishing machine, means for supplying a blacking to a shoe, means for polishing the shoe, and a timing-cam for stopping theoperation of the blacking-supply means and starting the operation of the polishing means.

4:. In a shoe-polishing machine, a foot-rest, a carriage, means for moving the carriage toward and from the foot-rest, a plurality of shafts supported by the carriage, a brush and a belt-pulley on each of the shafts, a pulleycarrying shaft supported by the carriage, belts connecting the several pulleys, a driven pulley mounted on said pulley-carrying shaft, a driving-pulley having stationary bearings, a belt connecting the driving and driven pulleys, and a belt-tightener bearing thereon and serving to permit reciprocatory movement of the driven pulley with the carriage without slackening the belt.

5. In a shoe-polishing machine, the combination with a foot-rest, of a brush-supporting carriage, revoluble brushes thereon, a crankshaft, a link connecting the crank to the carriage, and means for effecting slow rotative movement of the crank-shaft and rapid rota tive movement of the brushes.

6. In a shoe-polishing machine, the combination with a foot-rest, of an air-compressor, blacking-atomizing nozzles, supplemental airnozzles for directing currents of air against the shoes to be polished, a carriage, means for reciprocating the same, brushes supported by the carriage, and timing-cams for controlling the flow of air from the compressor to the atomizing-uozzles and the supplemental nozzles, and for governing the reciprocating movement of the carriage.

7. In a shoe-polishing machine, a brushsupporting carriage and a carriage-reciprocating means including a crank-shaft, a crank connected to the carriage, a revoluble frictiondisk, a friction-Wheel and pulley connected thereto, a rocker-arm carrying the frictionwheel, an operating means for transmitting the movement of the pulley to the crank-shaft, means normally holding the frictionwheel from contact with the friction-disk, and a timing-cam for forcing the friction-wheel into stopping the carriage at a predetermined point at the end of each operation.

9. Inadevice of the class specified, a brush, a brush-supporting carriage, a crank-shaft, a crank carried thereby, a friction-disk on the crank-shaft, a friction-wheel and pulley, a rocker-arm carrying the friction-Wheel and pulley, means for normally holding the friction-wheel from contact with the disk, means for transmitting movement from the pulley to the crank-shaft, a pivoted lever connected to the arm, a cam for actuating said lever and forcing the friction-wheel into engagement with the disk, a lock for holding said lever in operative position, and means supported by the carriage for releasing said lock as the carriage nears the limit of its rearward movement.

10. In a shoe-polishing machine, brushes, a reciprocatory carriage supporting the same, a crank-shaft, a crank carried by the shaft and connected to the carriage, a revoluble pivoted arm carrying said wheel and pulley,

means tending to hold the friction-wheel from engagement with the disk, a pivoted lever having a link connection with said arm, a cam operating on said lever and tending to depress the arm and cause engagement between the wheel and disk, a rock-shaft, a rocker-arm carried thereby and forming a lock for the lever, a second rocker-arm carried by the shaft, a bar extending from said second arm and provided with a projecting lug, and a bracket member supported by the carriage and adapted to engage said lug as the carriage nears the limit of its rearward movement.

11. In a shoe-polishing machine, polishingbrushes, a carriage supporting the same,means for reciprocating the carriage, a motor for operating the brushes and carriage, a revoluble timing member also operated by the motor, a pin or lug projecting therefrom, a rock shaft, an arm projecting from the rock-shaft and engaged by said pin or lug as the timing member nears the limit of its movement, and means controlled by said rock-shaft for cutting off the actuating medium of the motor.

In testimony that I claim the foregoing as my own I have hereto afiixed my signature in the presence of two Witnesses.

SIGMUND MORTON GOHN.

Witnesses:

D. SALrs COHEN, ALEX. BERNSTEIN.

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