US1219379A - Automatic brake for talking-machines. - Google Patents

Description

w'. N. DENMSON. AUTOMATIC BRAKE FOR TALKING MACHINES.

APPLICATION HLED SEPT- 8. I910.

. .b 7 w m. r5 n 4 I E E J. u an I mew i. 4 MET.- M //V E W w n m u 6 w m m P w r L V B 9 9 a 1 E m 1 ATTORNEY all/W w. nzwmsom. v AUTOMATIC BRAKE FOR TALKING MACHINES.

-APPLICATIQN FILED SEPT. 8. I919. 1,21 9,379. Patented Mar. 13, 1917 4 SHEETS-SHEET 2- WITNI'I'IS INVENTOR w. M. DENNISON.

AUTOMATIC BRAKE FOR TALKING MACHINES. APPLICATION mm S'EPTB, 1910.

Patented Mar. 13, 1917.

56 VINVENTOR VWZum/Vflemulsnn. Y

. wrrrvsssss w i BY W W arrokusv I w. mfnsmmsow. AUTOMATIC BRAKE FOR TALKINGMACHINES. APPLICATION FILED SEPT. a. mo. 1,219,379. Patented Man13,1917.

4 SHEETS-SHEET 4.

60 m l l I L 91 II 6 1 f/ 6 I 6/ 2 3 g K K INVENTOR I 9 165 T" F2 06 5 5g Wham/N 5612;120:011,

. WITNESSES I av n {6 L? ATTORNEY.

UNITED STATES" PATENT OFFICE.

WILBUBN N. DENNISON, OF MERCHANTVILLE BOROUGH, NEW JERSEY, ASSIGNOR TO VICTOR TALKING MACHINE COMPANY, A CORPORATION OF NEW JERSEY.

AUTOMATIC BRAKE FOR TALKING-MACHINES.

Specification of Letters Patent.

Patented Mar. 13, 1917.

To all whom it may concern:

Be it known that I, lVlLBURN N. DENNI- son, a citizen of the United States, and a resident of the borough of Merchantville, county of Camden, and State of New Jersey, have invented certain new and useful Improvements in Automatic Brakes for Talk ing-hlachines of which the following is a full, clear, and exact disclosure, reference being had to the accompanying drawings, forming a part of this specification.

The main objects of this invention are, to provide an improved brake adapted to be used in combination with a talking machine; to provide animproved autou'iatic brake for a talking machine which may be actuated either automatically by the operation of the talking machine or which may be actuated manually; to provide a stop mechanism with means permitting the set ting thereof to effect the stopping of the turn-table at substantially any predetermined point in the sound reproduction and permitting the adjustment thereof to operate with sound records of different lengths; v

to provide a stop mechanism with frictional means permitting the actuating member of said mechanism to be adjusted to different positions in the path of the tone arm; to provide a. stop mechanism with a pair of coaxially pivoted members one of which operates to effect the stopping of the turntable and the other of which is operated by the tone arm, together with a frictional conucction between said members; to provide an improved brake in which the lnraking action will take place gradually and with gradually increasing force 3 to provide in combination with a talking machine having a turntable for supporting disk records and provided with a downwardly projecting annular flange, an improved automatic bra ke, the main portion of which is a rrangcd beneath the turntable and which is adapted to engage against the inner surface of the annular flange of the turntable; and to provide other improvements as will appear hereinafter.

In the (.lrawings, l igure 1 is a. fragmentary top plan view of a talking machine provided with an automatic brake constructed in accordance with this invention; Fig. 2 a fragmentary perspective of the same; Fig. 3 a fragmentary perspective of the same showing the brake in operative position;

Fig. i a fragmentary perspective of the same showing the brake in inoperative position; Figs. 5 and 6 are perspectives of details of the same; Fig. 7 is a fragmentary side elevation partly in vertical section, of a portion of the same; and Figs. 8 and 9 are fragmentary views of a modified detail of construction.

Referring to the drawing, one embodiment of this invention comprises a talking machine provided with the usual or any suitable casing or cabinet 1, containing the usual actuating mechanism for rotating the usual spindle 2, which projects upwardly through the upper side 23, of the casing l, and which carries mounted upon its upper cnd a flat circular turntable it, arranged above the upper side of the casing i. and provided with a downwardly extending marginal annular flange or rim 5, having a cylindrical inner surface 6, coaxial ol' the axis of rotation of the turntable.

The talking machine is provided with the usual or any suitable hollow tone arm ll), carrying at its inner end a sound reproduce:

or sound box 11, adapted to cooperate usual with a record mounted. upon the turntable. The outer and oi the toncarm 10 is pivotally supported as usual. and may conimunicate with any suitable ai'nplilier l3.

Arrangwl beneath the turntable 4, and 'ithin the marginal flange 5 thereof is a plate 1?, which forms a base or support for some of the movable portions of this in) proved bralie. This plate elotacl'iably scoured to the upper sl'iriare of the upper side 3 of the motor casing, by ows 16 or by other suitable means, and has an u'i'wari. y projecting car 1? at one end, provided w th a circular aymrture 1S harming a hearing i'ma reduced end 1 at a fool; nail shoulder between this r :luced end and the main portion of the sin t being in engage ment with the inner sorta we of the our 13. to prevent movement of the sl'mtt longltlnli 'nally toward the car. The shall '20 preter- 7 ol the base 15.

ably secured to the shaft by means of a set screwiio, the collar being arranged to bear against the front end of the bearing 22, a recess 26 being provided in the upper side 3 of the casing beneath the collar, in which the collar is freely rotatable. ()n the rear end of the shaft 20 and in the rear of the bearing 22, is rigidly secured a collar 27, having pro-. jccting rearwardly downwardly therefrom and rigid therewith, a stud 28 forming a crank whereby the shaft 20 n'iay be rotated auton'nitieally by means to be hereinafter describcd, the. upper side of the casing being provided with a suitable recess.

A brake shoe or pad 30 is located beneath the turntable and adjacent the internal surface of the rim 5 of the turntable 4.. This brake shoe 30 is counted upon the free end of one branch of an angular arm or bell crank lever 31, the other branch of which is pivoted adjacent its outer end to the base 15 of the brake, upon a vertical stud 32, this latter branch of the lever being mounted to slide horizontally about its pivot in-a horizontal slot 33, formed in the forward edge of an upturned portion 3% of the base 15, the walls of the slot 33, forming a guide for the arm as it oscillates.

To oscillate the brake pad 30 in a'horizontal plane about its pivot 32, to throw it into and out of engagement with the internal cylindrical surface 6 of the rim 5 of the turntable, a flat link 35 is pivoted at one end to the arm 31, adjacent its vertex in the rear of the pad 30 by avertical headed pintle 36, and'.at its other end to a laterally movable vertical pintle 37, to which is also pivoted one end of a Hat link 38, the other end of which extends rearwardly and is loosely ahd slidably mounted in a horizontal slot Elf), of an upturned portion or bearing 40, The rear end of the latter link 58 is provided with a pin 41 in the rear of its hearing if), and between the bearing t0 and the pintle 37, this link is surrounded by a compressed spiral spring 42, which normally forces this link forwardly and keeps the pin 41 at the rear end ol the link always -in engagement with the rear surface of the bearing 40.

The two links and 38 and their conv u I 0 I nectmg pintle 2-37 are combined in the to'rm of a toggle joint which is actuated by an intermediate link L5, one end of which is pivoted upon the pintle 36, and the other end of which extends inwardly and is providerl with a stud 4L6 rigid therewith, which projects above and below this link. The upper end of the stud 46 engages loosely in an oblong slot 47, ot a hand lever 48, which is pivoted intermediate ol its ends on tl/e vertical stud 32 which is rigid with the base 1;") ol' the brake, and to which the brake pad 31') is also pivoted, as hereinbcfore described. 'llhe lower end of the stud 46 engages snugly at 51. freely below the under 'edge of the rimv 5 of the turntable to permit the tree movement of the lever and then projects outwardly in the form of a handle 52.

For guiding the inner end of the hand lever and the inner end 56 of the secondary lever to more in parallel horizontal planes, the inner portion of the base plate 15.is bent upwardly into a plane at right angles to the rock shaft 20, forn'iing a guide standard 60 which is provided with two oblong parallel horizontal slots'(31-:i1id 'il2,'the upper one ill of which has a width equal to the thickness of the inner end of the hand lever, and the lower one 62 of which has a width equal to the thickness of the inner end 56 of'the secondary lever. The outer ends of these slots terminate in substantially the same vertical planes, and the slots arc of sullicient length to permit of the necessary movements of the lovers.

For automatically swinging the brake shoe 30 into an operative position from an inoperative position, a spiral spring or other yielding member (35 is connected at one end to the secomlary lever 50 intermediate of its ends, and at its other end to the upturned portion i7 01'' the base plate 15. "lhis yielding member 65 is preferably maintained at all times under a tension tending to elongate the same, and tends to draw the free 'endof the secondary "lever rcar\\-'ardly to actuate through the link l5 and pintle 37, the two links 35 and 37 ot the toggle joint controlling the movement of the brake. pad 30.

For holding the brake shoe ill) in in'opcrative position, a catch is provided which rpmpriscs an oblong llat crank arm 70, arranged npon the inside of and in slidingcontact with the. upturned portion 60 of the base 15. The inner end of this catch 70 is provided with a hub or collar 71 rigid therewith, surrounding the rock shaft 20 nd detachably lixcd thereon by a pin 72 extending through the collar. This catch plate 70 is provided upon its upper edge adjacent ils outeror free. end, with an upwardly projecting lug 75' the outer and inner edges T-l of which converge upwardly and normally project into the, path of the inner end of the hand level" 48. This catch plate is also provided in its outer' portion i i ll the secondary lever 50 aga nst movement when the'brake is set in its inoperative powith an oblong slot .75, extending longitudinally ofthe plate. The inner portion of this slot 75 is substantially the same width as the thickness of the free end of the secondary lever 50,, and the lower wall of this shit is recessed adjacent the outer end of the slot, to receive the free end of the secondary lever 50, and to provide an abrupt outwardly facing substantially vertical shoulder 76, adapted to hold the free end of sition. The free end of the catch plate 70 is normally forced upwardly by means of a spiral spring 77, surrounding the rock shaft 20 between the catch plate 70 and the front bea'ring 18 of the rock shaft, one end .of the spring 77 being secured in an aperture. 78 provided therefor in the catch plate 70, and the other end of the spring being secured in an aperture 79 provided therefor in, the upturned portion 17, of the base 15. I

The outer inclined edge wall 74 of the lug 73 intersects the upper edge wall of the catch plate 70 in a line substantially 1n vertical alinement with the shoulder 76 formed by" the recessed portion of the slot 7 51in the plate, andthe proportions and arrangements of the slot 75 and its recess, and

the proportions of the secondary lever 50, hand; lever 48 and oblong slot 47 of the .hand lever are such that the inner free end 55 of the hand. lever may be brought into a position upon the upper edge of the catch plate 70, between the lug 73 and the forward end of the plate and when in this position, the inner end 56 of thesecondary .lever will be brought into position in the recess in front of and against the shoulder 76 of the slot 75 of the plate. The oblong slot -17 of the hand lever permits the inner end of the hand lever to be oscillatedinwardly against the adjacent inclined wall 74 of the lug 73 of the catch plate, and to be brought into position-upon the top Wall of the lug, forcing the catcluplate downwardly with respect to the secondary lever 50, and releasing the inner free end of the secondary lever from engagement with the shoulder 76, whereupon the free end of the secondary lever will be drawn inwardly toward the rock shaft 20 in the slot 75 of the catch plate and into engagement with the inner end wall of the slot, which limits the inward movement of the secondary lever.

chine, or in other words, when it is desired to set the brake in an inoperative position, the handle 52 of the hand lever 48, is

forced manually inwardly or toward the the slot 75 of the catch plate, and the ups per edge of the lug 73 of the catch plate is maintained below the lower wall of the slot -61 of the guide standard 60, until the free -end of the secondary lever passes in front of and clears the shoulder 76 of the catch plate, whereupon the free end of the catch plate is automatically lifted by-means of the spring 77, and the brake is thus auto maticallylocated in the inoperative position as shown in Figs. 2 and 3.

When the brake is thus set in its inoperative position, it may be released either manually by moving the hand lever 48, or automatically, as will be described hereinafter. For manually releasing the brake, the handle 52 of the hand lever 48 is moved out w-ardly or away from the rock shaft 20, whereupon the inner end 55 of the'hand lever will act upon the inclined shoulder 74 of thecatch plate and force it downwardly, thus releasing the inner end 56 of the secondary lever from engagement with the abrupt shoulder 76 of the catch plate, whereupon the inner end of the seconda lever will be drawn toward the rock sha i t 20 by the spring 65, taking up the lost mo tion between the secondary lever and the hand lever, and moving the hand lever withthe secondary lever.

This movement of the secondary lever is transmitted through the link 45 to the pintle 37 of the toggle joint and through the toggle joint to the brake pad 30, whichis thus moved outwardly away from the axis of the turntable and into engagement with the innor surface of its rim. The brake pad is thus brought into engagement with the rim of the turntable, before the secondary lever has completed its movement and before the pintle 37 of the toggle joint has been brought to its dead center or into alinement with the,outer ends of the links 35 and 38 of the joint.

The brake pad having thus been brought into engagement with the rim of the turntable, the secondary lever continues its movement under the action of the spring until the free end of the secondary lever is biht to a stop against the end wall 0F through its bearing 3!) in the plate it), as

shown in Fig. l. thus gradually increasing the pressure of the friction pad upon the rim of the turntable.

For automatically applying the brake a ft-er it has been manually set in an inoperalive position as heretofore desrribed, im-

proved means are employed adapted to bev actuated by a movable part ol" the talking maehin'e, to rotate the ['(N'h shatt 20, when desired, to swing the. tree end of the catch downwardly a sullieient distant-e to release. the inner end 54) ol the secondary lever. One embodiment of such means comprises. as shown in the drawings, a vertical stud St) rigidly secured at its upper end, to the under side of the tone. arm 10, and terminating at its lower end in the rear of the turntable and in )1'o.\'imit y to the upper surface of the top 3 of the motor easing of the talking machine.

Arranged between this stud Ht) and the collar 27 at the rear end o't',the roek shaft 20, is a vertical pivot Ht which projerts upwardly from the top It ol the motor casing and is rigidly secured thereto in any suitable manner; for instance, by having its lower portion extend through. the top It, and having a nut 82 threaded upon the lower end of the pivot and engaging against a washer 3 interposed between the nut amt a eounterbored seat R-t in the under side of the top 3, the pivot being also provided with a Hat circular washer o rigidly seeured thereto concentric therewith. aml bearing against the upper surt'aee ol'the top 3 of the. casing.

snugly but rotatably mounted upon the upper portion ot'the pivot 81 is a sleeve 86, the lower lace of which bears against the upper 'laee of the washer The upper portion ol this sleeve is redueed in diameter to Form a c \'lindrical bearing Hi coaxial with the pivot. Upon this bearing 87 is rotat'ively mounted one end of a substantial llat horizontal arm 88, whieh extends rearwardly lr m the pivot RI, and the outer end ol". whieh is bil'ureated to l'orm two lingers S9 and 9 'lorming a horizontal yoke \vliirh may be arranged in the path ot and to enrbraee the lower end ol' the stud S0 of the tone arm. This llat arm is l'rietionally and a'ljustably retained in any desired position of rotation with respeet. to the pivot 31 by means of two l'rielion washers 9t and 92, made ol' liber or leather or other suitable material. One. ol' these washers surrounds the sleeve 86, between the arm and the lat annular shoulder 5) formed between the lower portion and the upper reduced portion of the sleeve, alul the other surrounds the reduced portion ot the sleeve and is in engagement with the upper side of the arm.

The arm is yieldingly pressed between these two washers 91', 92, by means of a yielding spider 9t made of tempered steel or other suitable material, the arms 95 of whieh engage against the upper friction washer H2. The spider is ai ljustably held in engagement with the upper friction washer. by means of a nut tlt'i. which is threaded upon the upper end of the sleeve so, the upper end being preferably rei'lueed for this purpose to provide an annular shoulder 5.)? between the tl\t".:l(lt-(l portion and the main portion ot' the sleeve, against which the nut may be tightly clamped. The sleevi- Ht) is detaehahly held against upward movement by a rap serew 9H. threaded into the upper end of the pivot, the head of the srrew being rlamped tightly against the end ol"the pivot and overlapping, loosely the upper end of the sleeve, the sleeve preferably having a slight amount of end movement between the head of the screw 98 and the washer 85.

For transmitting'the rotary movement of the sleeve St; to the roek shaft 20, an Offset arm J!) is rigidly seem-ed at one end to the lower end of the. sleeve. St in an annular recess ttlt) provided therefor. The free end of this oll'set arm is freely. movable in a recess [05 provided therefor in the upper side of the top 3 of the motor casing, and this tree end is provided with an oblong slot the, in whieh loosely engages the stud rigid with the. eollar 27. oi the rock shaft ill.

liy this construction the arm 88. Parrying the lingers St and SN). is eonnected to the sleeve tsti with sullieient pressure to release the .brake, through the aetion ot' the arm 5.)!) and stud 28, without moving the yoke or tingers Sit and J0 with respect to the sleeve. S6. The arm Sh, however, may be easily amt i uieklv moved into any desired osition ol" adjustment. with respeet to the sleeve St'. by applying a. pressure to its tree end slightly in exeess'ol' the amount. ot pressure needed to release the. brake. The arm mav thus be adjusted so that the stud U will be brought into engagement with the inner linger 5'.) ol' the arm at any desired point in the movement ol the tone arm l to apply the brake automatically, and the adjustment may obviously be made so that when the tone arm has rea hed the end of its path in playing any reeord. the marhiue will be automatically stopped.

lnthe operation of this automatic brake, the lower end ot the stud Stlot the tone arm.

' he swung freely outwardly to bring it into a starting position, and by a further outward movement the stud 80 may be brought into engagement with the outer finger 90 of the arm 88 to eilect an outward adjustment of the arm with respect to its sleeve 86'. The

arm may thus be adjusted either inwardly or outwardly by the movement of the tone arm. in two ways. The first is by swinging the tone arm 10 outwardly beyond the record until the stud 80 engages thefinger 90 and consequently moves the inner finger 89 to a position in which it must be engaged by the stud 80, when the tone arm 10 is swung inwardly, before the stylus is in alinement with the innermost convolution. The tone arm 10 is then swung inwardly until the stylus is in alinenient with the innermost convolution of the record, whereupon the stud 80 will engage the finger 89 and turn the lever 88 upon its pivot, such motion being permitted by reason of the friction between the two arms 88 and 99. When the stylus is in alinement with the inner convolution of the record, the finger 89 will have been automatically adjusted to stopping position. .The tone arm is then swung outwardly until the stylus is in alinement with the outermost convolution of the record and in coming to such position the stud 80 will not have engaged the finger 90. The lever 52 is then operated to move the brake 30 in to the position shown in Fig. 1 and the stylus placed in the outer end of the groove. After the tone arm 10 has swung again over the record by reason of the engagement of the needle with the groove of the record tablet, the stud 80 will again come into engagement with the finger 89 and moving it slightly will trip the braking mechanism and stop further rotation of the turntable. The engagement of the stud 80 with the finger 90 wheneyer the swinging arm 10 is moved outwardly to a position in which the stylus is outside of the outermost convolution of the record tablet, is for the pur pose of moving the inner finger 89 to a position in which it must be engaged by the stud 80, as the arm 10 is swung inwardly, before the stylus is in registration with the inner end of the record groove, thus enabling the operator to always set the device by the arm 10 to operate at the end of the reproduction of sound of any selected record if he so desires, irrespective of the diameter of the inner convolution of the record groove.

T he other way of setting of the mechanism The stopping mechanism may-be set may be employed when the lever 88 is in such a position that the finger 89 would not be engaged by the stud 80 when the stylus is in the innermost convolution of the sound record groove. The mechanism may then be set so that it will operate automatically at the end of the reproduction of sound from a particular record tablet by swinging the arm 10 to bring the stylus into a inement with the innermost convolution and then swinging the outer finger 90 outwardly to move the lever 88 outwardly until the finger 89 is brought in engagement with the stud 80. After that the stylus is placed in the outer convolution and the brake pad 30 moved out of engagement with the turntable. In Figs. 10 and 11 is shown a modified construction for imparting the motion from the swinging tone arm 10 to the mechanism for releasing the brake automatically. This mechanism is similar to that illustrated in Figs. 2 and 7 of the drawing, but in this form of the device, the fingers 89 and 90 of the arm 88' are arranged substantially vertical instead of horizontal, and are mounted firmly upon the rock shaft 20. In this form of the device, adisk 107 ssecurely fastened or attached to the rock shaft 20, as by a pin. 108, extending through a flange or hub 109 on said disk 107, and through said.

rock shaft 20. Adjacent this disk 107, which is provided with a plane face, is arranged the friction washer 91 loose on the shaft 20, and adjacent the washer 91 is the arm 88,

' also loose on the shaft 20. Adjacent and beyond said arm 88' is the other washer 92, which is clamped or pressed against the arm 88, by the arms 95 of the yielding spider 94, which, in turn, may be held in a predetermined position by a nut 96 threaded over the e d of the rock shaft 20, and prevented from' accidental turning or displacement in any suitable manner, as by a check nut 110.

In applying this invention, it is obvious that various modifications might be made to meet various conditions, and that manychanges might be made in the constructions hereinbefore described without departing from the spirit of this invention or the scope of the appended claims.

Having thus fully described this invention, I claim and desire to protect by Letters Patent of the United States:

1. An automatic brake, comprising a brake member, a rockshaft mounted to oscillate in a fixed axis, a catch carried by said rock-shaft to holdsaid brake member in inoperative position, and means pivoted upon an axis transverse to the axis of said rock-shaft for automatically rotating said rock-shaft to release said catch.

2. An' automatic brake, comprising a brake member, a rock-shaft, a catch carried i by said rock-slut it to hold said brake. member in inoperative position, and means for rotating said rock-shaft; to release said catch, said latter means comprising two coaxially rotatable members friction-ally rctaincd in prcdetermined relationship with respect to each other with sutlicient force to release said brake. member, but freely adjustable rotatably with respect to each other by a pressure slightly in excess of the pressure required to release said brake member.

3. The combination in an automatic brake, of a brake member, meansfor relez tsing said brake member, comprising two coaxially rotatable members frictionally rctained in predetermined relationship with respect to each other with sutlicient force to release said braltc member, but freely adjustable lotatabl with respect to each other by a pressure slightly in excess of the pressure required to release said bralte. member.

4. The combination .in an automatic brake, ot' a brake member catch for holding said bralv'e member in inoperative position, and means for releasing said catch, said means comprising two members frictionallv. retained to predetermined relationship with respect to each other, with stillicient .t'orcc to release said catch. but mov able with respect to each otherin response to a force slightly in excess of the force required to release said catch.

An automatic brake comprising a -bralcc member, a rock-shaft. an oscillatory catch rigid with said rocleshat't to hold said brake member in inoperative. position, amt oscillatol' means pivoted upon a tixed axis for automatically rotating said rocksha'lit to release said catch.

(1. ,-\n automaticbrake, comprising a movable brake member, means [or moving said hralcc member into operative position. aml means for holding said bralte mem er in inoperative. position, said last ment oned means comprising a roclt-slral't, yielding means tending to rotate said rock-shaft. through a limited arc, a catch-plate rigid with said rtxjk-shal't and provided with a slot having a recess forming an internal shoulder, and a lever operativelv c nnected to said brake member having a tree end arranged to reciprocate in said slot and adapt ed to be engaged by said shoulder.

T. An automatic bralt-e, comprising a movable. brake member. means tor moving said bralt'c member into operative position, and means for holding said brake member in inoperative position, said last mentioned means comprising a rock-shalt, yielding means tending to rotate said roclt-shat'i through a limited are, a catch-plate rigid with said rock-shaft and prodided with a slot having a recess forming an internal shoulder, a lever operatively connected to said brake member ha ring a fret-end arranged to reciprocate in said slot; and adapt:-

ed to be engaged by said shoulder, and

vwith a braking 1nember,of a pivoted catch member arranged to hold said braking member 111 an inoperative position, a pivoted arm for releasing said catch, and a frictionalconnect-ion intermediate said arm and said catch member, whereby movement is communicated to said catch member to release said braking member when said arm is moved in one direction.

9. In a stop mechanism, the'combination of a brake member, a catch for moving said brake member to an operative position, means for holding said brake member in an inoperative position, means for actuating said catch and means including a frictional connection intermediatesaid actuating means and said catch for ca'nsing said'catch to move with the actuating means to release the brakeand also permitting the actuating means to be moved independentlyof the catch for adjustment.

10. in a stop mechanism, the combination of a pair of coaxially pivoted members, one of which is free, brak ng means releasable b the other of said meml'iers, and frictional means between said n'icn'ibcrs causing said members to move together about their pivot to release the braking means and also permitting said free member to be moved relativel wto the other member for adjustment.

11. in a stop mechanism, the combination ot a pair of coaxially pivoted arms, a movable bralt'e member releasableby one of said arms, and frictional means connecting said arms and permitting the other oi said arms to move. both with and relatively to said last. mentioned arm and to actuate the same when moving therewith in one direction about the pivotal axis of said arms.

, 12. in a stop mechanism, the combination of a movable brake member, releasing mechanism therefor, and actuating means for and connected to said releasing mechanisn'i, and movable both with and relatively to said releasing mechanism, and arranged to move therewith when actuating said releasing nn-chanisiii.

3. In a device of the class described, a swinging member, a rotarv member, a brake and means for propelling the same against. a portion of the rotar v member, and means for releasiimsaid brake when the swinging member reaches a predetermined position,

said brahe releasing means including in its bcr'ovcr the rotary member to the point wbyhere it is desired to stop the rotary memer. a

l4. In a device of the class described, a swinging member with a projection secured thereto, an arm adapted to engage said projection, a pivot on which said arm is mounted, a second arm mounted on said pivot, frictional means connecting said arms so that onei may be moved relatively to the other when suflicient force has been applied to overcome the friction between them, a spring actuated brake engaged-by said second arm, and a rotary member against which said brake impinges.

. 15. In a device of the class described, a swinging member with a projection secured thereto, an arm adapted to engage said proection, a pivot on which said armis mounted, a second arm mounted on said pivot, frictional means connecting said arms so that,

one may be moved relatively to the other when sufiicient force has been applied to overcome the friction between them, a spring actuated brake controlled by said second arm, and a notary member against which said brake impinges. v

16. In a device of the character described,

the combination with a rotatable member and a traveling member movable relatively to said rotatable member, of braking mechanism and means adapted to release said braking mechanism for stopping the rotatable member, said releasing means comrisin a frictionally mounted device adustabe to a position for releasing the braking mechanism .when said members reach a predetermined position by moving the traveling member over the rotatable member to said predetermined position.

17. In a stop mechanism, the combination with a rotatable element and a traveling element movable relatively to said rotatable element, of a movable member for elfecting the stopping of said rotatable element, a catch for holding said member in a position inwhich it does not effect the stopping of said rotatable element, means for moving said member to a position in which it is effective for stopping said rotatable element, means for actuating said catch to release said member, and means including a frictional connection intermediate said actu- 'ating means and said catch for causing said catch to move with said actuating means to effect the stopping of said rotatable element, and also permitting said actuating means to be moved independently of said catch into predetermined adfusted positions in the path of said traveling element.

18. In a stop mechanism, the combination with a rotatable element, of a pair of coaxially pivoted arms one of which is free, a movable member releasable by said other armto effect the stopping of said rotatable element, and frictional means connecting- Said 'arms, said free arm moving with said other arm under a force sufiiclent to actuate said other arm and also moving relatlvely to said other arm under force sufiicient to overcome said frictlon.

19. In a sto mechanism, the combination with a rotata le element and a traveling element movable relatively to said rotatable element, of mechanism for effecting the stopping of said rotatable element, and means adapted to release said mechanism to effect a stopping of said rotatable element, said releasing means comprising a frictionally mounted device adjustable to a position for releasing said mechanism when said elements reach a predetermined position, by moving said traveling element over said rotatable element to said predetermined position.

20. In a stop mechanismythe combination with a rotatable element and a traveling element movable relatively to said rotatable element, of mechanism for stopping the said rotatable element and means adapted to release said mechanism for effecting the stopping of said rotatable element, said means comprising a pair of arms pivoted together, one of WlllCll isrelatively free and the other of which coacts with said stopping mechanism, said free arm being provided with separated branches, one branch being arranged to be engagedby said traveling element to move said free arm with respect to the other arm and adjust it to a position to actuate said stop mechanism a predetermined point in the travel of said traveling element across said rotary element, and the other of said branches being arranged to be engaged by said traveling element and moved with respect to the other of said arms in swinging said traveling element to the "limit of its motion in the opposite direction.

21. In an automatic brake, the combination with a rotatable element and a travel- .ing element movable relatively thereto, of

mechanism for effecting the sto ping of the rotatable element, and means or releasing said mechanism, said means-including a pair of coaxially pivoted members, one of which (to-acts with said mechanism and the other of which is relatively free and is located in the path of said traveling element and adapted to be operated thereby, and means for causing said first mentioned member to move with said free. member about their axis to release said stopping mechanism and for permitting said free member to also have independent movement relative to theother member.

22. In a stop mechanism, the combination of a rotatable element and a traveling element movable relative thereto, of a brake IL is hereby certified that in Lottnrs Patent l,' !ll,.';7.i, granted arch 115, 1917, upon Hm npplilz-ltirm nf Wilbur" lh-unmmu "f Sh-n-hmlvillv Burnugh,

Nvw Jorsuy, for an imprhvnnmnt in Auhmmliv Hnduv. fur l'.|lking-Mm'llilms," vrmm uppvnr in tluprinlwl \pm-ifivnliun nequiriug rurrm-tilm :h fnll m'st Pug? 6,

IN! 81 r'lzlim U, [or a um-h n-ml mlmn': smmmgv :|l||| vlaim. line S13. Fm tlw wunl lll'lllllfi l'mul u (Mir/1: :myl Hull- (.he said Letters lnhmt should be read will: thew corrections therein that the same may conform (.u the rornnl of the cause in the Patent Office.

Signed imd sealed this 3=l day of April, A. 1)., 1917.

I". \V. II. CLAY,

Acting Uonnnissioner of I 'atenta

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