US1417540A

US1417540A - Work support

Info

Publication number: US1417540A
Application number: US247732A
Authority: US
Inventors: Fred L Mackenzie
Original assignee: United Shoe Machinery Corp
Current assignee: United Shoe Machinery Corp
Priority date: 1918-08-01
Filing date: 1918-08-01
Publication date: 1922-05-30
Anticipated expiration: 1939-05-30

Description

F. L. MACKENZIE.

WORK SUPPORT.. APPLICATION mm Auc.1. ma. RENEWED JULYIG. 1921.

1,417,540. Patented M y 30, 1922.

3 SHEETS-SHEET I.

44, Fig.1.

4 y lnllli; l

//vv/vT0/z F. L. MACKEN ZIE WORK SUPPORT. APPLICATION FILED AUGJ, 191-8 RENEWED JULY i6..l9gl. 1,417,540. Patented May 30, 1922.

3 SHEET8SHEET'2- ..Fig;2.

F. L. MACKENZIE.

WORK SUPPORT.

v I APPLICATION FILED AUG.1|1918- RE NEWED jULYI6.192l- 1,417,540.

2 m W W @m 3H N Z 5 4M f w fi m. v m WW lllllllllllll I l D the heel seat eno of the outsole into UNETED STTEfi ?ATENT OFFICE.

run-n L. MACKENZIE, or BEVERLY, MASSACHUSETTS, assIeNoR 'ro UNrrEn SHOE MACHINERY CORPORATION, or PATE'RSON, NEW JERSEY, A CORPORATION on NEW JERSEY.

WORK sorron 'r.

Specification of Letters Patent. Patgntd 30, 1922,

Application filed August 1, 191a. sen- 1 No. 247,732. Renewed July 16,1921. Serial N... 485,349@

Beverly, in the county of Essex and Com-' monw ealth of Massachusetts. have invented certain Improvements in ,Vork Supports,

of which the following description, in connection with the accompanying drawings, is a specification, like reference characters on the drawings indicating like parts in the several figures I This invention relates to work supports and'to mechanism for controlling work supports, such for example, as those used in the manufacture of boots and shoes, and has especial utility in machines for inserting fastenings. It will he understood, however, that the invention is applicable to other ypes of m-.;-hines and is capable of utilization in connection with other types of work supports.

In the manufacture of boots and shoes it is common practice to secure the heel seat of the sole of a shoe to the lasted shoe with metallic or other suitable fastenings before Fre-' the last is withdrawn from the upper. quently. also, spring and other kinds of heels are secured to the soles of shoes while the last is still within theshoe. and these heels when so secured" are often thereafter slugged or otherwise provided with protectors or ornaments while the shoe is still on the last. of these operations, before the last is removed from the shoe, it has been found advantageous to mount the last on a jack spindle provided with suitable means to engage and retain the last thereon. The machine in which a work support of this kind is to be used commonlyhas a stationary work abutment against which the work is pressed during; the fastening inserting operation. It is desirable that the work all cases be clamped firmly during the insertion of fastenings, for example, in the operation of heel seat nailing, in order to press close contact with the insole and folded-in margin of the shoe upper and to insure that the in successfully performin any erations owing in some instances toxlack of uniformity in the positions, depths and conditions of the last pin holes in'the lasts on which the work is mounted but more especially to differences in thickness ,of the work, as for instance, in the heights of heels, to diiferences in the heights of lasts, and to other causes tendingto a lack of uniformity in the work. In one class of machines commonly used for inserting fas tenings in heel seats and in heels, adjustment of the work support to secure proper presentation of the work and proper release for feeding of the work has been effected byvhand. Because of the conditions attend ant upon the presentation of work to the operating instrumentalities as outlined above, the application of'proper clamping pressure on thework requires, theoretically at least, frequent. adjustment of the work support. As amatter of actual practice, however, the work support was adjusted only for shoes distinctly'different' in style or size from those last operated upon, or

ore run lasts of a different size or type. This practice followed naturally, since the time and elfort necessarily expended in the manual adjustment of the work support rendered it a matter of such inconvenience that the operative avoided it wherever possible. 'Moreover, there being no measuring means for the work, the degree of adjustment and therefore of the clamping pressure effected depended altogether upon the skilland judgment of the operative. For this reason also, no attempt was made to adjust for anything but marked variations in'the characteristics of the work,

It is an object of the present invention to provide. an improved work support mechanism thatwill automatically measure the work and ensure the. applicationv of properpressure on work of varying thi kness during the operation of fastening insorting or other mechanism thereon.

In one aspect of the invention, considered with especial reference to embodiment in a. machine such as that shown in Letters Patent to George Goddu, No. 1,030,775, granted June 25, 1912, in which work-clamping pressure is applied yieldingly at the time the shoe operating instrumentalities become operative, important features of the invention consist in the organization by which lOO work supplied.

, vention is. shown embodied in a fastening pressure applied upon the work'is uniform over the widest range of thlcknesses 1n the An important feature of the invention is the provision of means for automatically adjusting the work support to variations in the thickness of the work practically simul taneously, with the application of final clamping. pressure: thereon. This. feature adds greatly to the ease and rapidity of'operation of the machine.

My invention contemplates also a novel form of work support which is locked in work receiving position to enable the work to be readily positioned thereon. Before the machine is started the work support is mstantaneously unlocked in order that the work measuring operation may take place, the construction and arrangement being preferably such that the locking means is controlled by the mechanism for starting the machine in operation. 7

Other important features and objects of the invention will appear from the following description and claims when considered in connection with the accompanying drawings.

In the drawings,

Fig. 1 is a side view partly in section showing the application of my inventionito a fastening inserting machine. 7

Fig. 2 is a frontview partly in section of the automatic adjusting mechanism of the work support, and

Fig. 3 is a side view of the mechanism shown in Fig. 2. v

For the purposes of illustration, the ininserting machine of the type disclosed in said Letters Patent, the said machine comprising fastening inserting mechanism indicated by reference character 4 having the usual work abutment 6 and work gage 8 Mounted in the frame 10 of the machine is the usual horn or jack shaft 12 which rests at its lower end on a two-part lever 14, the

I connection between the jack shaft 12 and lever 14 comprising a slidably pivoted block 16, the construction of the lever and connection being exactly as shown in the patent to Goddu No. 1,011,941, granted December 19, 1911, to which reference should be had for a detailed account of this part of the structure. Briefly, the mechanism for lifting the jack shaft 12 consists of the lever 14 already mentioned to which there is pivoted at 18 the lower link 20 of a toggle comprising an upper link 22 pivoted to the lower end of a slide 24 which is reciproca-ble in a casing 26 fixedly secured to the machine frame. Slide 24 is lockedv to its casing or surrounding bracket by means disclosed in the last-mentioned patent whenever the toggle is broken to cause thework-releasing movement of the work support while the work is being fed.

Adjustably attached to the upper end of the slide 24 is a rod 28 surrounded by a heavy spring 30 extending from the collar 32 on the rod 28 to a partition plate located at 34 in the machine frame. "lo make and break the toggle ther is pivoted: at on the machine r'rame bell crank lever 38 connected by a link 40 with the pivot 42 of the toggle links 20 and 22, said bell crank 38 being operated in properly timedrelation with respect to the inserting mechanism by means of a cam on the main shaft 44 through a link 46 attached to the upper arm of the bell crank.

elevated to press the work against the abutment 6 by depressing a controller illustrated as a treadle 50, the latter being connected by a link. 52 to a bell crank 54 pivoted at 56 and having a cam portion 58 which co-operates with a cam projection 60 on one part of the two-part lever 14 to raise the jack shaft 12 as said part of the lever 14 moves with respect to the other part about the pivot 62 as a fulcrum, it being understood that the machine comes to rest with the toggle 20, 522 in the position shown in Fig. 1.

The construction and arrangement of the jack spindle is such that the 'work mounted thereon ordinarily just clears the abutment 6, that is, moves thereunder with space to spare when the jack spindle is moved from front to rear in positioning the work under the abutment, so that a slight upward movement of the jack spindle brings the work in contact with the abutment after which said part of the lever 14 ceases to turn about (32 as a fulcrum and turns instead about pivot 64 in the block 16, thus raising the free end of the other part of the lever and through the toggle mechanism and rod 28 compressing the spring 30 and in this manner effecting final clamping pressure on the work. Following this, further or continued downward movement of the treadle 50 causes the actuation of the shaft 44, and h nce of the power means for operating the work support and the inserting mechanism, through the upward movement given to the rod 66 which controls the clutch starting HlQChStlIlSIII OH shaft 44, there being a yoke connection 68 between the. rear end of the treadle 50 and the said rod 66. All of the mechanism thus far described will be found set forth in detail in the patent to Goddu No. 1,011,94l, referred to above. A. separate treadle 9 may be provided for starting the machine, this arrangement being such that the work support remains in lowered or work-receiving position while the fastening inserting mechanism only is operated.

Mounted upon the horn or jack shaft 12 is the work support mechanism shown in the present embodiment of the invention to comprise a jack spindle 48 pivoted on a transverse axis 70 to a plate 72 mounted to rock After the work has been placed upon the jack spindle 48 the same may be 7 on an axis at right angles to the first-mentioned axis, in a manner similar to that shown in the patent to Cuff, No. 919,424, granted April 27, 1909, and carried by a slide 7 4 having convenient shoulders or projections 76 to which are attached the corresponding ends of two springs 78 preferably of the form shown in Fig. 1 of the drawings, the other ends of said springs-be ing attached by screws 80 to a housing 82 fixedly secured to the lower end of a bracket 84 in which housing the plate 74 is slidably received. constitute a supporting member for the plate 74 and the parts carried thereby. The plate or slide 74 is retained in its housing'by means of a pin-and-slot connection indicated at 85, Fig. 2. Upon reference to Fig. 2 of the drawings it will be'observed that the plate 74 is provided with rack teeth. 86 at its opposite edges, the rack teeth on one edge facing upwardly and those on the other edge downwardly. Mounted in the housing 82 are

pawls

88 and 90 normally pressed into engagement with the rack teeth on the slidable plate by means of

plungers

92 and 94,

respectively urged into contact with the pawls by springs one of which is disclosed at 96. y means of the co-operating rack and pawls the spindle 48 is locked in the housing 82 against movement in either direction relatively thereto. Mounted fixedly upon'a short shaft 98 in thehousing 82 is a cam plate 100 having cam portions 102 arranged to engage the pawls 88'and 90 to cause the same to be disengaged from the teeth 86 on plate 74, thus freeing the plate so that the springs 78 may carry said plate and the jack 48 upwardly to press the work into yielding contact with the abutment 6. In order to rotate the cam plate 100 in the illustrative machine there is mounted fixedly on shaft 98 a ratchet wheel 104 with which there is engaged a pawl 106 pivoted at 108 on an arm 110 mounted loosely on shaft 98, the said arm having pivoted thereto at 112 the rod 114 which extends downwardly and is connected to the outer end of treadle 50. An adjustable connection 115 is provided between the rod 114 and treadle 50 by means of which the time of locking of the spindle to its supporting member may be varied slightly with respect to the move ment of the lever 14 and thus determine adjustably the pressure on the work originating in spring 30. Obviously,-upon depressing the treadle the arm 110 will be rotated about the shaft 98 moving the ratchet wheel 104 along with it until the pawl 106 engages the cam surface 116 on the plate 118, the said cam surface acting to disengage pawl 106 from the ratchet wheel after having moved the latter through a distance equal to the length of a cam surface 102 on the cam plate 100, the operation resulting in The housing 82 and bracket 84 disengaging. the

pawls

88 and 90 from the teeth 86 and then permitting them to re-engage the said teeth. As the pawl 106 is disengaged from the ratchet wheel 104 when the cam plate 100 has been moved the requisite distance, further movement of the treadle does not disturb the rearranged pawls in their connection with the teeth on springs 78 to carry plate 74 and the at tached jack spindle 48 upwardlyto press the work against the abutment 6. This operation of pressing the work against theabut-' ment thus measuring the same takes place practically instantaneously and the pawls then re-engage the rack teeth, thus locking the. plate '74 and its connected jack spindle 48 firmly and fixedly to the bracket 84 carried by the jack shaft 12. This operation of moving the jack spindle 48 upwardly and looking it with relation to the jack shaft takes place in the first part of the depression of the treadle. so that there is only a slight upward movement of the lever 14 about fulcrum 62 before the described unpress spring 30 and thus place the work lOO under final clamping"pressure backed by r said spring 30. At theend of the downward movement of the treadle 50, the starting mechanism is actuated throughthe connecting rod 66 and the machine operates toilisert fastenings in the work. During the operation of the" machine a fastening is inserted in the work while it is held firmly pressed against theabutment, the jack spindle is then depressed through breaking of the toggle 20, 22 while the work is being fed, and the work again pressed against the abutment 6 through straightening of the same toggle 20, 22, thus clamping the work while the next fastening is being inserted.

It will be observed from the construction Y that after the workis measured the jack spindle is again locked fixedly to its supporting member 84 while pressure is placed upon the work'during the further deprcssion of the treadle. VVhen one piece of work has been operated upon, the treadle 50 is permitted to rise underthe action of the spring 67 surrounding the rod 66, thus rei moving the: cam 58 from supporting position beneath the lever 14' and permitting-the work support to drop into work receiving position. Since the spindle as is normally locked to its supporting member 82, 8 1, when the work support drops a considerable space is left between it and the work abutment.

, sarin 's 78 in order that the work ma be shoved in under abutment 6. This is accomplished by a slight downward movement of the treadle just suflicient to cause the cam plate 100 to move the pawls outwardly from engagement with the teeth on plate T l. Under these conditions, the jack spindle may then be depressed directly by the operative against the action of springs 78 to get the work positioned properly under abutment 6 and when this is accomplished the treadle is further depressed to cause the regular operation of the machine.

I-Iaving fully described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. In a machine of the class described, a work support movable between work-receiving and work-clamping positions and normally locked in work-receiving position, manually operable means for moving the support toward work-clamping position, and means for automatically adjusting the support to variations in the thickness of work and'for locking said support in adjusted position preliminarily to the operation of the machine. I

2. In a machine of the class described, a work abutment, a work support movable be tween work-receiving and work-clamping positions, manually operated means for mov ing the support toward work-clamping position, power means for moving the work support toward and from said abutment, and means operatively connected to the power means for automatically adjusting the support to variations in the thickness of the work.

3. In a machine of the class described, a work support movable between work-receiving and work-clamping positions and normally locked in work-receiving position, means for moving the support toward work clampingposition, and means controlled by said first-mentioned means for moving the work support into work clamping position and for looking it there.

l. In a machine of the class described, a work support movable between work-receiving and work-clamping positions and nor mally locked in work-receiving position, means for moving the support'toward workclamping position, and means, controlled by said first-mentioned means and operating simultaneously therewith, .tor moving the work support into work-clamping position and for locking it there. r

'5. In a machine of the class work support movable between work-receiving and work-clamping positions and norm ally locked in work receiving position, said work support being so mounted that it may be readily depressed directly by the workman in placing work thereon thicker than that previously operated upon, means for moving the support toward work clamping position, and means for automatically adjusting the 'su )OOl't areliminaril to throwin the mal a y z:

chine into operation, to ensure the application of uniform pressure to the work.

6. In a machine of the class described. a

work support movable between work-receiving and work-clamping positions, said work support being so mounted that it may be readily depressed directly by the workman in placing work thereon thicker than that previously operated upon, manually operated means for moving the support toward work-clamping position, and means for automatically adjusting the support, preliminarily to throwing the machine into operation, to ensure the application of uniform.

pressure on the work.

' Y 7. In a machine of the class described, a

work support movable between work-receiving and work-clamping positions and normally locked in work-receiving position, means for yieldingly applying final clamping pressure to the work on the support, and means for adjusting the support automatically so that said final pressure isluniform, independent of the thickness oi the work.

8. In a machine of the class described, a

work support movable between work-receiving and work-clamping positions, manually operated means for moving the support toward work-clamping position, spring means for then completing the upward movement of the work support to measure the work, and means for locking the work support after the measuring operation.

9. In a machine of the class described, a work support movable between workreceiving and work-clamping positions, manually operated means for moving the support to-' ward work-clamping position, and means, controlled by the first-mentioned means. for automatically measuring the work prelimlnary to further operation thereon.

10. In a machine of the class described, a

work support movable between work-receiving and wor -clamping positions, manually described, a

operated means for moving the support toward work-clamping position, spring means, operable simultaneouslywith the first-mentioned means, for completing the upward movement of the work support to measure the work, and means for locking the work support after the measuring operation.

11. In a machine of the class described, a work abutment agai -Ji) which the work may be clamped, a work support movable between work-receiving and work-damping positions, means for moving the work support toward said abutment, and means construrted and arranged to operate simultaneously with the firstmentioned means for pressing the work on the support yieldingly against the abutment.

12. In a machine of the class described, a work support normally locked in position on the machine, manually operated means for moving the support, a spring for moving the support relatively to the manually operated means, and locking means operative to releas said support to the action of the spring and to lock said support at the termination of its movement by the the spring.

In a machine or" the class described. a work abutment against which the work may be clamped, a work support movable be tween work-receiving and work-clamping positions, means for moving the work support toward said abutment, power means for moving the work support toward and from said abutment, and means separate from and operating simultaneously with the first-men tioned means for pressing the work on th support yieldingly against the abutment 14. In a-machine of the class described, a work abutment against which the work be clamped, a work support movable between work-receiving and work-clamping 'positions, manually operated means for moving the work support toward the abutment comprising a horn or jack shaft on whi h the work support is mounted, and means for moving the work support automatically with re z-ect and in the direction of the length oi" said shaft during the operation of the first-mentioned means.

15. In a machine of the class described. a work abutment against which the work may be clamped. a work support movable between.

vl'or -recciving and work-clamping positions. manually operated means for moving the work support toward the abutment comprising a horn or jack shaft on which the work support is mounted, and means for moving the worksupport automatically with respect to said shaft during the operation of the first-mentioned means. and for locking the support to said shaft at the end of its move ment. said locking means being under the control of the operator.

16. In a machine of the class described, a

work support normally locked in position on the machine, a spring for moving said sup-- port, and manually controlled locking means operative to release said support to the action of the spring and to lock said'support at the termination of its movement by the sprin 17. In a machine of the class described, a work abutment'against which the work may be clamped, a work support movable between work receiving and work clamping positions, manually operated means for moving the work support toward saidabutment con structed and arranged to apply final work clamping pressure, and means operating simultaneously with the first-mentioned means to measure the work.

18. In a machine of the classdescribed, a work abutment against which the work may be clamped, a work support movable between work receiving and work clamping positions, manually operated means for moving the work support towardsaid abutment constructed and arranged to apply final workclamping pressure, and means operating automatically to measure the work preliminarily to the application of said pressure.

19. In a machine of the class described, a work abutment against which the work may be clamped, a work support movable between work-receiving and work-clamping positions, manually operated means for moving the work support toward said abutment constructed and arranged to apply final work-clamping pressure, and automatically operated means for measuring the work and for locking the work support to said manually operated means.

20. In a machine of the class described, a work abutment against which the work may be clamped, a work support movable between work-receiving and work-clamping positions, manually operatedmeans for moving the work support toward said abutment constructed and arranged to apply final work-clampingpressure, power. means for moving the work support toward andfrom the abutment, and means operating automatically to measure the work preliminary to the operation of said power means.

2].. In a machine of the class described,

a work support movable between work-re- I relation to each other, means for starting the machine, and means controlled by said starting means for locking the spindle to its supporting member. 7

23. Ina machine of the class described, a work abutment, a work support normally spaced from said abutment and movable between work-receiving and work-clamping positions, said support comprising a jack spindle and a supporting member therefor, means for starting the machine, means for automatically 1 moving the spindle toward work-clamping position, and means for locking the spindle to its supporting member.

24:. Ina machine of the class described, a work abutment, a -work support normally spaced from said abutment and movable between work-receiving and work-clamping positions, said support comprising a jack spindle and a supporting member therefor, manually operable means for positively mov ing the spindle toward work-clamping position, and means controlled by said firstmentioned means for yieldingly moving the spindle in the same direction.

25. In machine of the class described, a work support movable between work-receiv ing and work-clamping positions and normally in work-receiving position, said support comprising a jack spindle and a supporting membertherefor, manually operable means for moving the spindle andcits supporting member toward work-clamping position, and means for moving the spindle automatically relatively to its supporting member and into final work-clamping position.

26. In a machine of the class described, a work support movable between work-re ceiving and work-clamping positions and normally in work-receiving position, said support comprising a jack spindle and a supporting member therefor, means for starting the machine, and means controlled by said starting means for moving the spindle automatically relatively toits supporting member and for locking it in proper rela tion thereto.

27. In a machine of the class described, a work support movable between workreceiving and work-clamping positions, said support comprising a jack spindle and a supporting 'member therefor'normall-y in locked relation to each other,,and means for moving the spindle automatically rel atively to its supporting member and for looking it against movement in either direction-relatively -to the supporting member.

, 28. 'In a machine of the class described, a work abutment,,a work support normally spaced from said abutment and movable between work-receiving and work-clamping p0s1tions,:said' support comprising a jack spindleand ar supporting member therefor, means operative for'pressing the spindle to receiving manually operated means for moving the ward \vorlcclamping position, a treadle andmeans intermediate between the jack spindle and its supporting member and controlled by said treadle for locking the jack spindle to its supporting member.

29. In a machine of the class described, a

work support movable between work-receiving and work-clamping positions, said support comprising a jack spindle and a supporting member therefor normally in locked relation to each other, a treadle, means controlled by said treadle for locking the spindle to its supporting member, and means for causing relative movement between the spindle and its supporting member.

30. In a machine of the class described,

a work support movable between workspindle on its support, and a rotary camoperable by said treadle for controlling said locking means.

31. In a machine of the class described, a

a work support movable between workmecciving and work-clamping positions, said support comprising a jack spindle and a supporting member therefor normally in locked relation to each other, means operative auto;

-1natically for moving the spindle toward work-clamping position and automatic means controlled by said first-mentioned means for yieldingly moving the spindle in the same direction.

32. In a machine of the class described, a work support movable between work and work-clamping positions,

work support constructed and arranged to apply final work-clamping pressure, and

means operating simultaneously with the first-mentioned means to adjust the work support to work of varying thickness.

In a machine of the class described, a work support movable between workreceiving and work-clamping positions, manually operated means for moving the work support constructed and arranged to apply final work-clamping pressure, and automatic means operating simultaneously with the first-mentioned means to ensure the application of uniform pressure to pieces of work of various thicknesses.

34 In a machine of the class described, a work support movable between work-receiving and work-clamping positions, manually operable means for moving the work support to work-clamping position, and cam controlled means for locking the support in work-receiving position.

In a machine of the class described, a work support movable between work; receiving and Work-clamping positions,

means for moving the work support to workclamping position, means carried in part by the work support for locking the support in work-receiving position, and starting mechanism arranged to control said locking means.

36. In machine of the class described, a Work support movable between workreceiving and work-clamping positions, means for periodically depressing the work support from work clamping position, means separate from the depressing means for moving the work support constructed and arranged to apply final work-clamping pressure, and automatic means operating simultaneously with said moving means to ensure the application of uniform pressure to pieces of work of various thicknesses.

3?. ln a machine of the class described, a jack shaft, a work support" movable from work receiving to work clamping position, means for locking the work'supportto the jack shaft, and manually controlled'means for unlocking the work support from the jack shaft upon movement of the support from work receiving toward work clamping position.

in a machlne of the class described, a

work support movable from work receiving to work clamping position, a member to which said work support is normally locked in work receiving position, manually operable means for moving the support toward work clamping position, and means for unlocki the support from said member upon movement of the support toward work clamping position and for locking the sup port to said member upon the arrival of the support at work clamping position 39. In machine or" the class described, a work support movable from work receiving to work clamping position, manually opera ble means for moving the work support toward work clamping position and means for n'ioviug the support relatively to the manually operable means upon movement of the support toward work clamping position;

at). In a machine of the class described, a work support movable form work receiving to wo k clamping position, a supporting membe to which the work support is normal y locked, manually operated means for moving the supporting member, and means for mo ing: the work support rel atively to its supporting member to measure the work upon movement of the supporting; member by the manually operable means.

41v In machine of the class described, a work supportmovable from work receiving to work clamping position, a supporting member to which the work support is nor mally locked. manually operated means for moving the supporting member to elevate the work support to work clamping position, means for moving the work support relameans, and means for moving tively to its supporting member to measure the work, and means tor securing the work support to its supporting member for movement therewith. I

as. In a machine of the class described, a work support movable from work receiving to work clamping position, means for periodically depressing the work support from work clamping position constructed and ar ranged to compensate for variations in thick ness of the'work, and means distinct from the depressingmeans for locking the work support in work receiving position.

In a machine or" the class described, a work support movable from workreceiving to work clamping position, means for periodically depressing the work support from work clamping position, and means for looking the work support in work receiving position, constructed. and arranged to be operative during a. complete cycle of operation of the depressing means. v

44. In a machine of the class described, a work support movable from work receiving to work clamping position, means for movinp; the work support toward work receiving position, means for periodically depressing the work support from work clamping position, and means separate from the first men tioned movingmeans for automatically moving the work support relatively to the depressing means. i V

45 ,In a machine of the class described, a

work support movable from work receiving to work clamping position, a supporti member therefor, means for depressing the supporting member to move the work sup port from work clamping position, means for locking the work support to the support ing member during a complete cycle of operations of said depressing means, and means for moving the work support relatively to its supporting member upon movement of the support from work receiving to work clamping position.

In a machine of the class described, a work support movable from work receiving and work clamping positions, a supporting member therefoiz means for depressing the supporting member to lower the work support from work clamping position, connections between the work support and its suppor member for locking the work sup port to its supporting member during a complete cycle Oi operations of the depressing he work support relatively to the supporting member upon movement of the support trom work receiving to work clamping position.

47 in a machine of the class described, a work support movable from work receiving to work Clamping position, a supporting member towhich the work support is normally locked, means for depressing the supporting member to lower the work support from work clamping position, and means in terposed between the work support and the supporting member for effecting relative movement of the support and the supporting member upon movement or" the support from work receiving to work clamping position.

48. In a machine of the class described, a work support movable from work receiving to work clamping position, a supporting member therefor, said work support and supporting member being constructed and arranged for relative movement in accordance with the thickness of the work upon movement of the work support to Work clamping position, means for locking the work support to the supporting member in work receiving position, and manually operable means for moving the work support from work receiving to work clamping position.

4L9. In a machine of the class described, a Work support, a supporting member therefor, a yielding connection between the work support and the supporting member, operator controlled means operable on the sup porting member to apply final work clamping pressure to the work support, means for locking the work support to the supporting member, and means operated by said operator controlled means for controlling said locking means.

50. In a machine of the class described, a work support movable from Work receiving to work clamping position, a supporting member therefor, means for moving the supporting member to raise the work support, and means for locking the work support to its supporting member, constructed and arranged to permit relative movement of the work support and the supporting member when the work support is raised and to secure the support in fixed relation to the sup porting member during the reverse move ment of the supporting member.

51. In a machine of the class described, a work support movable between work receiving and work clamping positions, a member operable in one direction to move the work support from work clamping to work receiving position and in another di rection to cause reverse movement of the support to work clamping position, means for normally locking the support to said member when in work receiving position, con structed and arranged to be operative during the entire movement of said member in the first-mentioned direction and during the latter part of its reverse movement, and means for moving the support relatively to said member intermediate between the movements of said member in said first-mentioned direction.

52. In a machine of the class described, a work support movable between work receiving and work clamping positions and normally locked in work receiving position, 5

manually controlled means for moving the support toward work clamping position, and mechanism operating in timed relation to the means for moving the support toward work clamping position for adjusting the support to compensate for variations in the thickness of the work and for locking said support in adjusted condition preliminarily to the operation or" the machine.

53. In a machine of the class described, a work abutment, a work support movable between work receiving and work clamping positions, means for moving the support toward work clamping position, power-operated means for moving the work support toward and from said abutment during the operation of the machine to facilitate the feeding of the work, and mechanism operatively connected to the power-operated means and arranged to operate in timed relation to the moving of the support toward work clamping position for adjusting the support to compensate for variations in-the thickness of the work.

54. In a machine of the class described, a work support movable between work receiving and work clamping positions, and normally locked in work receiving position, said work support being so mounted that it may readily be depressed directly by the operative when necessary in placing work thereon, means for moving the support toward work clamping position, and mechanism for adjusting the support preliminarily to throwing the machine into operation to insure the application of uniform pressure to the work.

55. In a machine of the class described, a work support movable between work receiv ing and work clamping positions and normally locked in work receiving position, means for yieldingly applying final pressure to the work on the support, and mechanism for adjusting the support arranged to operate prior to the application of final pressure to the work to insure uniform final. pressure independent oiithe thickness of the work.

56. In a machine of the class described, a work support movable from work receiving to work clamping position, a member to which said work support may be alternae tively locked in work receivingand in work clamping position, a controller movable'in a limited path to initiate and terminate operation of the machine, and means operated in accordance with the position of said controller for-locking the work support to said member when the controller is at either end ofits path of movement and releasing the work support from said member when the controller is at an intermediate portion of its path of movement.

57. In a machine of the class described, a jack shaft, a work support carried thereby .initiate and terminate operation of the machine, and mechanism constructed and arranged tolock the work-support to the jack shaft in work receiving or work clamping position according as said controller is at one} end or the other of its path of movement and to release the work support from the jack shaft to permit relative movement of said work support and jack shaft when the controller is at an intermediate portion of its path of movement.

58. In a machine of the class described, a work support movable from work receiving to work clamping position, means operable to lock the work support alternatively in work receiving and work clamping position, a controller for the machine movable through a limited path, and means controlled by the movement of said controller for operating the locking means to lock the work support in work receiving or in work clamping position according as the controller is at one end or the other of its path of movement and for releasing the work support from the locking means when the controller is at an intermediate portion of its path of movement.

59. In a machine of the class described, a work support movable between work receiving and work clamping positions, means comprising a spring for moving the work support toward work clamping position, means carried in part by the work support for locking the support against movement by said spring, starting mechanism,

and a treadle having connections for con-' trolling the starting mechanism and the looking means.

60. In a machine of the class described, a work support movable between work receiving and work clamping positions, a spring for moving the work support toward work clamping position, a latch comprising a pawl and a toothed member, one of which is carried by the work support, cooperating to hold the worksupport against movement by said spring, and a treadle having connections for controlling said pawl.

61. In a machine of the class described, a work support movable between work receiving and work clamping positions, a spring for moving the work support toward work clamping position, a latch comprising a pawl and a toothed member, one of which is carried by the worksupport, co-operating to lock the Work support, against movement by said spring, and a treadlehav- 1ng connections for releasing the pawl from engagement with the toothed member thus permitting the spring to move the work sup port. j 62. In a machine of the class described, a work support-movable between work receiving and work clamping positions, va spring for .movin the work support to work clamping PGSltlOIl, a latch comprising a pawland a toothed member, one of which is carried by the work support, co-operating to lock the work'support against movement by the spring, and a manually controlled cam member for moving the pawl from looking position thus permitting the spring-to move the worksupport.

63. In a fastening inserting machine, a

work support movable between work-receiv-' ing and work clamping positions, a'spring for applying work clamping pressure and serving as an abutment during the insertion of fastenings, power-operated means for latching the work support in work receiving position, and a manually operable controller for unlatching the work support so that it may move to work clamping position.

64. In a machine of the class described, a work support movable between work receiving and work clamping position, a latch member carried by the work support, a spring tending to move the work support to work clamping position, a manually operable controller'movable to start and stop the machine, and means connectedto and operable by the controller to cause the latch member to latch the work support in work receiving position when the controller is in its stopping posltion.

65. In a fastening inserting machine, a

[FRED L. MACKENZIE Certificate of Correction.

It is hereby certified that in Letters Patent No. 1,417,540, granted May 30, 1922, upon the application of Fred L. Mackenzie, of Beverly, Massachusetts, for an improvement in Work Supports, errors appear in the printed specification requiring correction as follows: Page 3, line 5, for the Word convenient read con'vem'entlz page 7, line 112, claim 46, for the word from read between; and that the said Letters Patent should he read With these corrections therein that the same may conform to the record of the case in the Patent Otfice.

Signed and sealed this 29th day of August, A. D., 1922.

[SEAL] KARL FENNING,

.7 i 1 4 Acting Commissioner of Patents.