US1292378A - Fastening-inserting machine. - Google Patents

Description

J. SAYER.

FASTENING INSERTING MACHINE.

APPLICATION FILED MAY23. I916.

Patented Jan. 21, 1919.

4 SHEETS-*SHEET 2 VENUE? J. SAYER.

FASTENING INSERTING MACHINE.

APPLICATION FILED MAY 2a. 1916.

Patented Jan. 21, 1919.

4 SHEETS-SHEET 3.

J. SAYER.

FASTENING INSERTING MACHINE.

APPLICATION FILED MAY 23. 1916.

1,292,378 Patented Jan.21,1919.

4 SHEETS-SHEET 4.

JOHN SAYER, OF LEICESTER, ENGLAND, ASSIGNOR, BY MESNE ASSIGNMENTS, TO

UNITED SHOE MACHINERY CORPORATION, OF YATERSON, NEW JERSEY, A COR- PORATION OF NEW JERSEY.

FASTENING-INSERTING MACHINE.

' Application filed May 23, 1916,

To all whom it may concern:

Be it known that I, JOHN SAYER, a subject of the King of England, residing at Leicester, Leicestershire, England, have invented certain Improvements in Fastening- Inserting Machines, 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.

This invention relates to machines for inserting fastenings. By way of illustration the invention is herein shown as embodied in a machine of the type disclosed in United States Letters Patent No. 490,621, granted January 24, 1893, on an application of Louis Goddu, ,for inserting screw threaded fastenings in the soles of boots and shoes.

In the useof machines of the type of said Letters Patent on some classes of work, the maximum spacing desired exceeds considerably the maximum spacing obtainable with machines of this type as heretofore constructed. Also, it is frequently desired to make considerable changes in the spacing of the fastenings at different part-s of the shoe operated upon. Consequently when operating upon such work it has been necessary for the operator to advance the work manually between successive fastening locations, depending necessarily upon his own skill and accuracy to effect the proper spacings and to locate the fastenings correctly, with the result that not only has especial skill been required on the part of the operator and the operators work been rendered considerably more laborious, but the output of the machine has been reduced considerably and the results obtained have generally been unsatisfactory.

One of the objects of the present invention is to eliminate these disadvantages producing an improved fastening inserting machine especially adapted for inserting screw threaded fastenings in the soles of boots and shoes, which machine, at the will of the operator, may readily be rendered capable of dealing either with any ordinary and normal spacings or with spacings considerably outside of the normal range of spacings.

In accordance with this object of the invention, the illustrated machine is provided with means under control of the operator at all times, which means are so constructed Specification of Letters Patent.

Patented Jan. 21, 1919.

Serial No. 99,328.

and arranged that whenever extra Wide spacings are desired, the operation of the fasteninginserting mechanism may be suspended periodically without suspending or interfering with the operation of the work feeding mechanism to the end that the amount of work feeding movement between any two successive fastening inserting operations may be increased.

Preferably and as shown, in accordance with an important feature of the invention, the illustrated means for periodically suspending the operation of the fastening inserting mechanism is organized to act automatically at regular intervals during the operation of the machine, .the construction and arrangement being such that the initial suspension of operation of the fastening inserting mechanism will invariably occur at a predetermined point in the cycle of operations of the machine regardless of when the operator actuates the means for suspending the operation of this mechanism.

In the illustrated machine, in accordance with another feature of the invention, this result is accomplished by automatically suspending the operation of the fastening inserting mechanism once between each two fastening insertions so that, as long as the extra wide spacing is desired, the work feeding mechanism will impart to the work two work feeding steps between every two successive fastening inserting operations, thereby doubling the spacing range of the machine.

Other objects and features of the present invention will be apparent from the following detailed description of a'machine of the type described having the present invention incorporated therein. It is to be understood, however, that the invention is not intended to be limited to use in connection with machines of this type, since the appli cability of the invention to fastening inserting machines of other types is recognized.

Referring to the drawings,

Figure 1 is a side elevation of the upper portion of a machine for inserting screw threaded wire fastenings having one embodiment of the present invention incorporated therein:

Fig. 2 is a detail view, in front elevation and partly in section. of the embodiment shown in Fig. 1;

tion is herein shown as incorporated is substantially the same as that disclosed in said above mentioned Letters Patent except as hereinafter set forth and reference may be had to said Letters Patent for a more detailed description of the construction and operation of parts not fully described herein.

The machine has a base carrying a column 2 which supports a head 4 havingmounted therein a vertically disposed spindle 6 which carries the wire from which the fastenings are formed. The spindle 6 is continuously rotated by a belt passing over a pulley 8 on the upper end of the spindle and over idlers 10 to a driving pulley 12 (Fig. 1) arranged to be clutched to a driven pulley (not shown) in the base of the machine by suitable clutch mechanism. The spindle 6 is provided with a worm which engages worm gears 20- (Fig. 1) upon the forward ends of parallel shafts indicated at 22 and 23, of which the shaft 22 carries the various cams for effecting the wire feeding, wire severing, work feeding, and automatic horn depressing operations. These cams are each formed to cause two operations of the mechanism operated thereby during each complete revolution of the cam shaft 22.

The wire is fed downwardly throughthe spindle 6 by a wire feeding and inserting sleeve 24; (Fig. 1) surrounding the spindle 6 and slidably mounted in guideways in the machine frame, the lower end of said sleeve being provided with wire gripping members 26 which operate intermittently to seize the wire as. said sleeve is moved downwardly. The sleeve 24: is reciprocated in the machine frame to feed successive lengths of wire andinsert them into the work by a wire feed lever 28 (Fig. 1) pivoted at 30 to the ma chine frame and having two forwardly projecting arms 31 each carrying a segmental gear 32, the gears 32 engaging respectively racks 34: formed on a yoke attached to the upper end of the sleeve 24. An upwardly extending arm 36 of the lever 28 carries a cam roll 38 operatively engaged by a wire feeding edge cam 40 on the cam shaft 22. The wire feed lever 28 is normally held in position to be operatedby the cam 40V to move the feeding sleeve 24: downwardly by a comparatively strong spring the lower,

end of which bears against a part of the lever 28.

After a proper length of wire is inserted in the work, the wire is severed by wire severing knives mounted in the lower ends of two knife carrying arms 41 and 43 both fulcrumed on a shaft 47 mounted in the machine frame. The knife carrying arms or holders 41 and 43 carry gears (not shown) which mesh with cooperating gears on the forward end of a shaft 51 (Fig. 1). Upon rocking movement of the shaft 51 the holders 41 and 43 are reciprocated toward and from each other to cause the cutting edges of the knives to sever successive lengths of wire in timed relation to the operation of the wire feeding mechanism. The shaft 51 is oscillated through connections with a wire severing cam 45 provided with two outstand ing toes, one of which is shown at 53, adapted to operate intermittently a lever 49 operatively connected to the shaft 51.

After each fastening has been inserted and out off, the work is automatically fed by a feed wheel 127 (Fig. 1). The feed wheel 127 carries on its under side a bevel gear (not shown) meshing with a bevel gear on the outer end of a shaft 129. The opposite end of the shaft 129 carries a pinion 131 adapted to be operatively engaged to oscillate the shaft 129 by a rack on the lower end of one arm of a two-armed lever 133, the other arm of which lever has a stud and slot adjustable connection with a lever carrying a cam roll traveling in a cam track in the wire feed cam 40.

The above described mechanisms and parts conveniently may be and as shown are constructed and operate substantially as shown and described in the above mentioned Letters Patent No. 490,621.

To permit the work to be fed between successive fastening inserting operations, the horn is periodically depressed through automatic horn depressing mechanism (not shown) which may be of .any suitable and well-known construction, such, for example, as that fully set forth in United States Letters Patent No. 383A55, granted May 28, 1888 on an application of Louis Goddu.

In the machines of said Letters Patent, the operating cam -10 for the wire feed mechanism, like the wire cutting mechanism cam 45, is a double throw cam so constructed that during every revolution of the cam shaft 22 two operative movements of the wire feeding mechanism are effected. In the embodiment of the present invention shown in Fig. l, to provide for automatically and periodically suspending the operation of the wire feeding mechanism once in every revolution of the cam shaft so that, when desired, every alternate wire feeding movement will be omitted and, instead of feeding and inserting two fastenings, for every revolution of the cam shaft, the machine will insert one fastening only for each revolution of the cam shaft, the wire feeding mechanism operating cam 40 is formed with two adjacent concentric cam paths 90 and 92, one of which 90 is the usual double throw cam and the other of which 92 is a single throw cam. In this embodiment of the invention the roll 38 of the arm 36 of the wire feed lever 28, which roll 'co-acts with the cam 40, is arranged to be adjustable at will from one to the other of the cam faces 90 and 92 according to whether narrow or wide spacing is desired, provision being made for effecting this adjustment of the roll 38 without stopping the operation of the machine.

In the construction shown in Figs. 1 and 2, the-cam roll 38 is free to rotate upon a spindle 94 between collars 96 and 98 pinned to said spindle. The spindle 94 is free toslide longitudinally in bearings 100, 102 provided for the ends of the spindle upon theupper end of the arm 36 of the wire feed lever 28 between the cam shaft 22 and the parallel shaft 23. In one of these bearings are formed oppositely disposed slots one of which is shown at 104, Fig. 2, through which slots project the ends of a pin 106 fixed to the spindle 94, these ends of the-pin 106 being engaged by the forked upper ends of the two arms 108, 110 (Fig. 1) of a lever 112 pivoted at 114 on the lever 28. The lower arm of the lever 112 is spring pressed outwardly away from the wire feed lever 28 by a spring plunger 116 disposed coaxially within the fulcrum or pivot stud 30 of the lever 28 and is operatively connected by means of a ball ended link 120 with a bell-- crank lever 122 pivoted at 124 to the machine frame and connectedby a rod 126 to a treadle, knee lever, or the like not shown.

In the operation of this embodiment of the: invention, if the rod 126 be pulled downwardly through movement of the knee lever or treadle, the bell-crank lever 122 acting through the link 120 against the influenceof the spring plunger 116 will swing the lever 112 to draw the spindle 94 longitudinally to move the cam roll 38 from its normal position in the cam path 90 into the cam path 92, thereby causing the wire feed lever 28 to receive one oscillation only for every rotation of the cam shaft 22, while upon release of the pull on the rod 126 the plunger 116 will be free to return the lever 112, spindle 94, and cam roll 38 to their normal positions with the cam roll 38 in the double throw cam track 90.

Inasmuch as the described means for periodically suspending the operation of thewire feeding mechanism is independent of, and does not interfere with, the operation of the work feeding mechanism, it will be seen that whenever the said means is operative the work will have imparted to it two feeding steps or movements between each two successive fastening inserting operations, thereby, in the described embodiment, ex actly doubling the spacing capacity of the machine.

A simple device for changing the wire feed lever cam from a double throw to a single throw cam is illustrated in Figs. 3 and 4, in which is shown a filler block 130 arranged to bridge over one of the two recesses or low places in the cam track, the filler block' 130 being secured in position in the cam 40 when the machine is at rest as by screws 132 received in holes 133 in the cam block. This device permits the desired change of spacing to be secured readily by a simple and quick adjustment without involving any mechanism except the single filler block and its attaching means. WVhen the filler block 130 is secured to the cam block the machine operates just as it does when adjusted for wide spacing in the use of the con.- struction above described, between each two successive screw insertions a double work feeding movement being imparted to the work.

The results obtained as above described may also be secured by providing mechanism which modifies the movements of the wire feed lever 28, as, for instance, by a latch or like device which, when rendered operative by the operator, acts in each cycle of the machine automatically to prevent the roll 38 on the wire feed lever 28 from entering one of the two cam recesses in the cam 40.

Such a construction is shown in Figs. 5 and 6 in which a bracket 140 is shown as attached to one of the bearings for the shaft 23, which bracket provides a bearing for a shaft 142 to one end of which is pinned an arm 144 having a hooked end or latch 146 adapted to pass below the wire feed lever 28 when the cam roll 38 of the lever 28 is on one of the high parts of the cam 40' and to hold the lever 28 in position to prevent the cam roll 38 from entering one of the recesses in the cam 40. The other end of the shaft 142 has pinned to it a bell-crank lever one arm of which 148 carries a cam roll 150 adapted to travel upon a cam surface 152 formed in the front face of the usual gear at the rear of the shaft 23, this gear being indicated at 154, Fig. 6. The other arm 156 of the bellcrank lever is coupled to one end of a hollow cylinder 158 movable in a guide in a depending portion 160 of the bracket 140 to swing said bell-crank lever. The cylinder 158is closed at its lower end by a plug 162 through which passes loosely a rod 163having a head 164 between which head and the plug a compression spring 166 is confined. Between the plug 162 and an adjustable plug 168 upon the bottom of the guide in the depending portion 160 of the bracket 140 a second compression spring 170 is confined.

The rod 163 which passes loosely through- 172 connected to a knee lever, treadle or other like mechanism for pulling the rod downwardly when desired.

The operation of the embodiment of the invention shown in Figs. 5 and 6 is as follows: Assuming the'parts to be in their normal positions in which the wire feed lever 28 will have two operative movements imparted to it for every revolution of the cam shaft 22, if extra wide spacing "is desired, the operator, by means of the knee lever, treadle or the like, pulls the rod 172 downwardly. This movement draws down the head 16% of the rod 163 and, by reason of the fact that the sprin 166 is stronger than the spring 170, forces t e cylinder 158 down wardly, compressing the spring 170 which acts normally to keep the cam roll 150 out of the path of movement of the cam 152, thus permitting the cam 152 through the cam roll 150 to swing the bell-crank lever'to position the latch 146 in operative relation to the wire feed lever 28 to engage and hold the wire feed lever 28 in inoperative relation to the cam 4:0. If the cam roll 150 is notrfreeito move to the right (Fig. 5) to drop into the cutaway part of the cam 152 at thetime when the rod 172 is pulled downwardly, the spring 166 yields so that as soon as the'said cam roll is free to move it snaps sharply across to its new position, and, as long as the rod 172 is held in its lowermost position, the roll 150 runs on the cam 152. With the parts in this relation, in each rotation of the shaft 23, the roll 150 drops quickly under the influence of the springx166 down the steep part 174: (Fig. 7) of the cam 152 to throwthe latch 1&6 under the lever 28 which has just been raised, at the end of a screw insertion, by the cam 40 against the spring pressed rod 17 6 and thus to hold the lever 28 in this position during, half a revolution of the shafts 22 and 23. After this half revo lution the cam part '17 8 throws the roll 150 toward the center of the cam disk,1compressing the sprin 166, to withdraw the said' latch from under t 1e arm of the lever 28 and allow the lever 28 duringthe remainder of that revolutionof the shafts 22 El-11'Clv23 to be operated in the normal manner.

It will be noted that the operation of the embodiments: of the invention above; described 1s 1n each instance-positive, therebe tinuouslyl rotating' wire carrying spindle,

wire feeding means driven from said spindle, work feeding means driven from said spindle and operating to efiect successive work feeding movements in timed relation to the normal operation of the wire feeding means, and means for renderingsaid'spindle' alternately ineffective and then effective to' impart wire feeding movements to the wire feeding means without interfering with the continuity of operation of the work feeding means, constructedand arranged to Vary the time relation between the feeding movements of the work and of the wire.

2. In a machine of theclass described, means for simultaneously feeding wire and inserting it into the Work, operatingmechanism for said means, work feeding means operating in timed relation to the normal operation of the wire feeding means, and means for rendering said mechanism alternately ineffective and then effective to impart wire feeding movement to the wire feeding means without interfering with the operatlon of the work feeding means, constructed and arranged to vary the time relation between the feeding movements of the work and of the wire.

3. In a fastening inserting machine, fastening inserting means including wire feeding means, operating mechanism for said means, work feeding means operating to effect successive work feeding movements in, timed relation to the normal operation of the fastening inserting means, and means for rendering said mechanism alternately ineffective and then effective to impart wire feeding movements to the wire feeding means without interfering with the operation of the work feeding'means, constructed and arranged to vary the time relation between the feeding movements of the work and of the wirez.

4. I11 a machine of the class described, reciprocatory wire feeding mechanism, work feeding mechanism, and means for automatically and periodically suspending the operation of said wire feeding mechanism withoutginterfering with the normal operation of the work feeding mechanism, constructed and arranged to increase the number of work feeding movements imparted to the work relatively to the number of oper ations of the wire feeding mechanism.

5 In a fastening inserting machine, fastening inserting means, work feeding means, and means for suspending the operation of the fasteninginsertin means periodically during the operation of the machine without interfering with the'operation of the work feeding means constructed and arranged to increase the amount of work feeding-movement relatively-zto the number of fastening inserting 1 Operations.

6. Ina fastening inserting machine, a,

Wire feedingmeans driven from said spindle, work feeding means driven from said spindle, and means under the control of the operator operating to suspend the operation of the wire feeding means periodically durin the operation of the machine.

In a machine of the class described, fastening inserting means, work feeding mechanism, and means for suspending periodically the operation of the fastening inserting mechanism during the operation of the machine constructed and arranged to increase the amount of work feeding movement of the work feeding mechanism between successive fastening inserting opera tions.

8. In a machine of the class described, fastening inserting means, work feeding mechanism, and manually controlled means for suspending the operation of the fastening inserting mechanism periodically without interfering with the operation of the work feeding mechanism constructed and arranged to increase the amount of work feeding movement between successive fastening inserting operations.

9. In a. machine of the class described, wire feeding mechanism, work feeding mechanism operating normally to impart a feeding movement to the work for every operative movement of the wire feeding mechanism, operating means for one of said mechanisms comprising an operating member, a member connected to said mechanism and operating to transmit power from the operating member to said mechanism, said members being constructed and arranged for varying operative relationship with each other of a character to vary the frequency of operation of said mechanism, and manually actuated means constructed and arranged for engagement with said power transmitting member to vary the operative relationship of said members and thus vary the frequency of operation of said mechanism without interfering with the operation of the other of said mechanisms, whereby the amount of work feeding movement between two successive fastening inserting operations may be varied.

1 0. Ina fastening inserting machine, wire feeding mechanism, operating means for said wire feeding mechanism comprisin a lever connected to the wire feeding mec anism and a shaft operatively related-to said lever, work feeding mechanism, and manually controlled means for varying the operative relation of said lever and said shaft constructed and arranged to suspend the operation of the wire feeding mechanism periodically during the operation of the machine without interfering with the operation of the work feeding mechanism, and being further constructed and arranged to effect the initial suspension of the operation of the wire feeding mechanism at a predetermined time only in the cycle of operations of the machine.

11. In a fastening inserting machine, fastening inserting mechanism, work feeding means, and means for periodically suspending the operation of the fastening inserting mechanism without suspending the operation of the work feeding mechanism, said means being constructed and arranged for control by the operator and operating auto-- matically when appropriately controlled to effect the initial suspension of the operation of the fastening inserting mechanism at a predetermined time only in the cycle of operations of the machine regardless of when said means are actuated.

12. In a fastening inserting machine, fastening inserting mechanism, operating means for said fastening inserting mechanism comprising a lever connected to said mechanism and a continuously rotating shaft operatively connected to said lever, work feeding mechanism, normally inoperative means for controlling the movements .of said lever during constant rotation of said shaft constructed and arranged to suspend periodically the operation of the fastening inserting mechanism without interfering with the operation of the Work feeding mechanism, and means for controlling the initiation and suspension of operation of said fastening inserting mechanism suspension means, said means for suspending the operation of the fastening inserting mechanism being constructed and arranged when rendered operative to suspend the operation of the wire feeding mechanism at regular intervals during the operations of the machine.

13. In a machine of the class described, a continuously rotating wire carrying spindle, wire feeding mechanism driven from said spindle, work feeding mechanism driven from the spindle, means normally inoperative and operating automatically when operative to suspend the operation of said wire feeding mechanism once in every machine cycle without interrupting the rotation of the wire carrying spindle, and mechanism for rendering said means operative.

14. In a fastening inserting machine, wire feeding mechanism, a continuously runningpower driven shaft, connections from the wire feeding mechanism to said shaft constructed and arranged to impart wire feeding movements to the wire feeding mechanism twice in every revolution of said shaft, and means for suspending the operation of said connections, said means operating automatically once in every revolution of said shaft whereby said connections are alternately ineffective and then effective to operate said wire feeding mechanism.

15. In a fastening inserting machine, work feeding means, means for simultaneously iso feeding Wire and inserting it into the Work, and means for varying the normal timing of the operation of one of said means relatively to the other constructed and arranged to continue automatically the effective operation of said means.

16. In a fasteninginserting machine, Work feeding means, means for feeding Wire and inserting it into the Work, means for operating the Wire feeding and inserting means in a certain relation to the operation of the Work feeding means, and means for controlling the manner of co-action of the Wire feeding and inserting means and its operating means, constructed and arranged to vary the relation of the operation of the Wire feeding and inserting means to that of the Work feeding means and to continue automatically the effective operation of said Wire feeding and inserting means.

17. A fastening inserting machine comprising, in combination Wire feeding mechanism, a lever operatively connected to said mechanism, an operating member for said lever, said lever and said operating'member being arranged to have a definite operative relation during successive cycles in the op eration of the machine, means for varying the character of said operative relation, constructed to maintain the changed operative relation of said mechanism and said operating memberduring successive cycles in the operation of the machine, whereby the operation of said mechanism during successive cycle of operation of the machine may be made to differ from the operation of said mechanism during other successive cycles of operation of the machine, Work feeding mechanism, and means for operating said Work feeding mechanism constructed and arranged to maintain uniform operation of said Work feeding mechanism during varia t-ions in the operation of the Wire feeding mechanism.

18. In a fasteninginserting machine, work feeding means, means for simultaneously feeding Wire and inserting it into the Work, and means controllable at Will for causing the operation of the Wire feeding and inserting means upon each operation of the Work feeding means, or upon alternate operations of the Work feeding means.

19. Ina fastening inserting machine, Work feeding means, Wire feeding means 1 constructed and arranged to grip the Wire and movable bodily With the Wire, mechanism for operating said Wire feeding means in ,normal tlmed relation to the Work feeding means, and means operated in timed relation to the Work feeding means for automatically rendering said mechanism alternately ineffective and then effective to impart Wire feeding movement to the Wire feeding means Withoutinterfering With the operation of the Work feeding means, constructed and arranged to vary the time relation between the feeding movements of the Work and of the Wire.

20. In a fastening inserting machine, Work feeding means, Wire feeding means, mechanism for operating said Wire feeding means in normal timed relation to the Work feeding means comprising a shaft, a cam carried by said shaft, a member operatively connected to said Wire feeding means and having a part arranged for engagement with said cam, and manually controlled means operated in timed relation to the Work feed ing means for changing the operative relationship of said member and said cam in such Wise as automatically to render said mechanism alternately ineffective and then effective to impart Wire feeding movement to the Wire feeding means Without interfering With the operation of the Work feeding means, constructed and arranged to vary the time relation between the feeding movements of the Work and of the Wire.

21. In a fastening inserting machine, Work feeding means, rciprocatory Wire feeding means, means for reciprocating said Wire feeding means constructedand arranged to cause said Wire feeding means'to operate once for each operation of said Work feeding means or to operate once for each alternate operation of the Work feeding means, and means for controlling the operation of said Wire feeding means.

22. In a fastening inserting machine, fastening inserting means for said fastening inserting mechanism, ork feeding mechanism, means normally disconnected from'said fastening-inserting mechanism and operated in timed relation With the operating means for said mechanism operable to suspend periodically the operation of the fastening inserting mechanism Without interfering Withthe operation of the Work feeding mechanism, and

means for operatively connecting saidnormally disconnected means to said-fastening inserting mechanism.

23. In a fastening inserting machine,Work

feeding means, ire feeding means, controlling means for said Wire feedingmeans constructed and arranged for movement to a position to suspend the operation of the Wire feeding means, manually controlled means for. moving said controlling means to such position, and means operated in timedrelation Withthe Wire feeding means" to cause said means to become again effectivelyxoperative.

24. In a fastening inserting machine, wire feeding means, means for rendering said wire feeding means inoperative during-a portion of the cycle of operations of .the machine comprising a member adapted to retain a part of said Wire feeding means out of operative relation to a second part :norits mechanism, operating 100 mally co-acting with the first part, yielding means acting to move said member into retaining position, and means to move said member in opposition to said yielding means.

25. In a fastening inserting machine, a continuously rotating wire carrying spindle, lateral shafts driven from said spindle, wire feeding means and work feeding means operated from one of said shafts and means comprising a part operated from the other shaft for varying the normal timing of the operation of one of said means relatively to the other constructed and arranged to continue automatically the effective operation of the said means.

26. In a fastening inserting machine, a continuously rotating wire carrying spindle, lateral shafts driven from said spindle, wire feeding means operated from one of said shafts, means for locking said wire feeding means in inoperative position, and means connected with the other of said shafts for releasing said locking means.

27. In a fastening inserting machine, fastening inserting means, a power driven shaft, operative connections from said fastening inserting means to said power driven shaft, means for rendering said connections ineffective comprising a latch, and means for automatically operating said latch at regular intervals during the operation of the machine.

28. In a machine of the class described, wire feeding means, a power driven shaft, operative connections between said wire feeding means and said shaft comprising a wire feed lever, a latch adapted to be moved into engagement with said lever to render said lever ineffective, and means for operating said latch at regular intervals during the operation of the machine.

29. In a fastening inserting machine, work feeding mechanism, fastening inserting mechanism, a power driven shaft, a double throw cam on said shaft and connections therefrom to said work feeding mechanism for operating said work feeding mechanism twice in every revolution of said shaft, a double throw cam on said shaft and connections therefrom to said fastening inserting mechanism normally operating said fastening inserting mechanism twice in every revolution of the shaft, and means for changing said last named cam from a double throw to a single throw cam or vice versa.

In testimony whereof I have signed my name to this specification.

JOHN SAYER.

Copies of this patent may be obtained for five cents each, by addressing the "commissioner of Patents, Washington, D. G.

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