US1071332A

US1071332A - Broom-sewing machine.

Info

Publication number: US1071332A
Application number: US41117608A
Authority: US
Inventors: Charles E Oyler; John Henry Parker
Original assignee: HAMILTON CASSARD
Current assignee: HAMILTON CASSARD
Priority date: 1908-01-16
Filing date: 1908-01-16
Publication date: 1913-08-26
Anticipated expiration: 1930-08-26

Description

C. E. UY`LER & J. H. PARKER.V BROOM SEWING MACHINE.

APPLICATION FILED IAN. 16, 1908.l

1,0719332, Patented Aug. 26, 1913.

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G. E. OYLBR & J. H. PARKER. BRooM SEWING MACHINE.

APPLICATION FILED JAN. 16, 1908.

1,071,332. Patented Aug. 26, 1913. gli@ 2n 5 SHEETSSHEBT 2.

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C. E. OYLER & J. H. PARKER. BooM SEWING MACHINE.

APPLICATION FILED JAN. 16, 1908.

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G. E. OYLER & J. H. PARKER. BROOM SEWING MAGHINB. APPLIoATIoN FILED @11.16, 190s.

1,071,382. Patented Aug. 26, 1913.

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G. E. OYLER & J. H. PARKER.

BROOM SEWING MACHINE.

APPLICATION FILED JAN. 16, 1908.

llldlTED STATES PATENT OFFICE.

CHARLES E. OYLER AND JOI-IN HENRYPARKERVOF BALTIMORE, MARYLAND, ASSIGNORS TO HAMILTON GASSARD, OFBALIIMORE, MARYLAND.

BROOM-SEWING MACHINE.

Broom-Sewing Machines, ofl which the following is a specification.

This invention relates to improvements in broom sewing machines and will be described in connection with the accompany- .ing drawings, in which:

Figure 1 is a perspective view of a broom sewing machine having the present inven-` tion applied thereto; Fig. 2 is an end elevation of a p rtion of the machine, on an enlarged scale; Fig. 3 is a side elevation of the upper part of the vise and the devices for controlling the step-by-step movements of the vise; Fig. t is a side elevation of the vise and the means for controlling the vertical adjustment of a broom therein; Fig. 5 is a detail view of the rack controlling the vertical movements of the broom holder and its connection with the broom holder; Figs. 6 and 7 are detail views of parts of the means for automatically varying the length of the step-by-step movements of the vise; Figs. .S and 9 are detail views of the looper, or needle threading device, employed; Fig. 10 is a view illustrating the action of the looper in threading a needle.

The present machine is generally similar te that illustrated and described in the U. S. letters-Patent No. 825,402, dated July 10, 1900, and therefore it is not considered nee essary to describe in detail all the parts of the machine but merely those to which the present invention rel ates.

Like the machine of the patent the present one includes a frame l having a suitable top plate 2, and a broom supporting vise comprising two pivotally mounted jaws 3. W'ithin the vise jaws is arranged a vertically adjustable broom support or carrier and the vise is moved step by step by suitable means. The thread. 4l. is drawn through the broom by needls 5 reoiprocated by levers 0 connected with the needles Vand actuated as described in said patent. The thread is properly positioned to be engaged by the needle hooks by means of the loopers or thread carri-ers each of which comprises a body 7 pivotally supported upon the frame of the machine and having an aperture 8 therein, through which the needle is adapt- Speceaton of Letters Patent.

Application filed January 16, 1908.

Patented Aug'. 26,1913.

Seria1No.411,1/6.

ed to pass. The looper body 7 is slotted and in said slot is mounted a swinging arm 0. A spring 9a connecting said arm with the body of the looper acts to hold the arm across the eye .8 in position to grip the thread as shown in Figs. 1 and 8. As the looper is rocked downward from the position represented in dott-ed lines in Fig. 3,

by means hereinafter described, a tail piece 10 on the arm 9 contacts wit-h a stationary pin or stud l1 and the arm 9 is thereby prevented from moving farther with the looper and is held in the position sho-wn in full lines in F ig. 3 in which it offers no obstruction to the free passage of the needle 5 through the eye 8. To positively limit the extent of movement which the looper can have in either direction, a pin 7 is connected with the spindle thereof and a stationary stop 7 is mounted on the frame.

`Normally the rocking movements of the looper will not bring the pin 7a into contact with the stop 71 but should the looper acquire such momentum as to be carried beyond it-s ordinary stopping point then said pin will engage the stop and prevent the looper being carried into a position where it might be broken or damaged. The pin 7 is of such height that it can pass beneath the stud 11. The needle passes through the eye 8 in the looper when the latter is in its lowest or rearmo-st position represented in full lines in Fig. 3, and as the needle is withdrawn from the broom the looper is rocked upwardly and forwardly so that the arm 9 is caused to extend across the eye 8 and grip the thread between itself and the rear wall of the looper eye as the needle leaves the looper. The two looper-s are reversely arrai'lged so that when one is descending or moving toward its lowest position the other isrising, and as shown in Fig. 10, carrying thethread acres the body of the opposite needle in rear of the hook or barb thereon so that the thread is positively positioned in rear of the hoolt and will be drawn through the loroomV as the needle moves in the opposite direction.

It will be noted that the operation of the looper above described is to lift or carry the thread over and draw itl directly into the eye of the needle instead of throwing the thread forward in the direction of the length of the needle, in the manner commonly folle-wed heretofore. That is, with the loopers heretofore employed the thread has been engaged with the needle eye while being carried in the direction of the sewing already done, or in the general direction of movement of the needle to be threaded. By the present invention, however, the looper is moving backward, or in the direction of the sewing to be done and opposite or against the general direction or' the needle movement when the thread is introduced into the needle eye. By the improved looper the needle is positively threaded and there is no chance of the thread slipping from the point or being so positioned as not to be engaged as the needle is drawn backward through the broom.

The looper is rocked in the manner above described by a train of gears 12, one of which is engaged by a rack 13 connected with an arm 1-1 that extends upwardly from a rock shaft 14, a downwardly extending arm 14h on said shaft having at it-s lower end a roller 14@ engaging a cam on a suitable disk or cam wheel 15. The vise aws are .moved toward each other to clamp a broom by means corresponding to those described in said patent, including a lever 16, and links 16a, 16b connecting such lever and the vise jaws. Means are provided by which the vise jaws may be held in any of several different positions, such means including a toothed bar 17 mounted on t-he vise trame and a coperating dog 18 carried by a treadle 19 which is connected with the lever 16 by means including an adjustable link rod 2O and a connecting bar 21. A spring 22 connecting the treadle or foot lever 19 with a stud on the vise acts to constantly exert a lifting :torce on said lever. At its lower end the bar 17 is provided with a pivotally mounted dog 17an adapted to engage with a stationary stop 23 on the base of the machine at the completion of the outward movement of the vise to release the toot lever or treadle and permit the spring 22, through the connections between the treadle and vise lever 16, to rock the latter to separate the vise jaws and permit the broom support within the vise to iall and bring the broom into position for the next succeeding row of stitches. A spring 17b holds the dog 17a in such position that it can yield when passing the stop 23 as the vise is swung inward preliminary to beginning a row of stitches. It will be seen that the lower end of the bar 17 moves in the opposite direction to that in which the upper end of the vise travels. lVhen the vise is in position for the formation of the first of a row of stitches the dog 17 and stationary stop 23 occupy substantially the relative positions shown in Fig. 4. As the upper end of the vise moves outwardly step by step during the sewing operation the dog is moved toward the stop and at the completion of the row of stitches the engagement between the stop and dog will cause the upper end of the barv17 to be moved away from the dog 1S, thus releasing he treadle 19 and permitting the vise jaws to separate. The completion of the outward movement of the vise will carry the dog 17El rearwardly beyond the stop 23, but as the dog is pivotally mounted on the bar 17 it is adapted to yield and oiiers no obstruction to the return ot the parts to the relative positions shown in Fig. a.

The broom support or carrier within the vise is raised to the desired height by the engagement therewith of an arm carried by a foot lever or treadle 2st. A rack 25, connected with the broom carrier, and a swinging or pivotally mounted dog 26 cooperate to hold the broom carrier in its elevated position and to control the downward movement thereof which is necessary to enable the machine to stitch the broom along different lines.

As shown in Figs. l and 5, the rack 25 is adjustably connected with the broom support being carried by a hanger 27 having at its upper end a fork the members of which are both provided with laterally extending, vertically separated, lugs 28 which entend respectively above and below a rib 29 on the broom support. The space separating the lugs 28 on the rack hanger is greater han the thickness of the web 29, thus permitting relative vertical movement of the rack and broom support. A stud 30 on the pawl 2G extends into a slot at the upper end of a lever 31 pivotally mounted at an interniediate point in its length and having at its lower end an aperture through which eX- tends a rod 82 pivotally connected with the base of the machine. The outer end of said rod 32 is threaded and on it is iitted an adjustable stop 33.

l'lvvhen a broom to be sewed is first placed in the vise the latter is entirely at one side of the path of the needles and the broom support and parts cooperating therewith are in the positions represented in Fig. Ll. At this time the broom support is held elevated by the pawl or dog 26 engaging the rack 25, the rib 29 resting on the lower lug 28 of the rack hanger. The vise being closed, by operation of the treadle 19, the broom support will be irmly clamped in its elevated position, although the rack 25 is tree to move relative thereto it the dog 26 is disengaged therefrom as hereinafter described. l/Vhen the vise is swung about its pivotal support- 311 to posit-ion the broom for beginning a line of stitches, the engagement of the pawl 26 with the lever 31 will rock the latter until the lower end thereof is in contact with the stop 33. This stop is so positioned that it will engage the lever' 31 shortly before the vise reaches the position for making the lirst stitch and as the vise continues to move the rack 25 will be carried away from the vise so that the vise jaws are closed to a greater' extent than before, the action of the link 57 due to the swingingV of the lever 5S by the spring 59, and parts connected therewith will turn the stop section 42 and by the action of t-he cam surfaces on the meeting faces of the

sections

42, 43 said sect-ion will be moved longitudinally thus increasing the length of the stop, thereby shortening` the distance through which the bar 35 can move when it is released from its clamping means and consequently the length of the stitch will be shortened.

lt will be seen that there is thus provided a very simple, automatically acting, mechanism for accurately varying the length of stitch in accordance with the thickness of the broom in the vise.

Having thus described the invention, what is claimed is:

l. In a broom sewing machine, the co1nbination with a broom holder, a needle adapted to be reciprocated through a broom in said holder, and means for effecting a relative transverse movement between the broom holder and needle, of an oscillatory thread carrier adapted to carry a thread over the needle and into the eye thereofl while moving rearwardly toward the unsewed portion of the broom.

2. In a broom sewing machine, the combination of a pivotally mounted broom holder, a needle adapted to be reciprocated through a broom in said holder and having adjacent its free end an eye that opens upwardly, means for intermittently moving the broom holder about its pivot, past the needle, and a movable thread carrier adapted to engage a thread at a point in rear of the needle to be threaded and carry such thread over the needle and into the eye thereof while moving rearwardly toward the unsewed portion of the broom.

3. ln a broom sewing machine, the combination with a broom holder, and needles adapted to be reciprocated through a broom in said holder from opposite sides thereof, said parts being arranged to permit a relative transverse movement between the broom and needles, of a pair o-f oscillatory thread carriers mounted on opposite sides of the broom holder and each adapted to withdraw the thread from the needle mounted on the same side of the broom holder and to carry the thread engaged thereby into the eye of the other needle as the latter is projected across the broom holder and while said carrier is moving toward the unsewed portion of the broom.

4L. In a broom sewing machine, the combination of a pivotally mounted broom holder, a needle adapted to be reciprocated through a broom in said holder, means for intermittingly moving the broom holder about its pivot, past the needle, an oscillatory thread carrier having an eye, through which the needle passes, a clamping finger' or arm, pivoted to turn about the same axis as the body of the carrier and movable across said eye, and a spring acting to hold said linger across the eye in position to clamp the thread, and a stop arranged in the path of said linger and adapted to cause the sameto be held away fro-1n said eye during a portion of each turning movement of the carrier, while the needle is passing through the eye of the carrler.

5. In a broom sewing machine, the combination of a pivotally mounted broom holder, a needle adapted to be reciprocated through a broom in said holder, means for intermittingly moving the broom holder about its pivot, past'the needle, an oscillatory thread carrier having an eye, through which the needle passes, a finger or arm pivotally mounted at an intermediate point in its length in a slot or socket in the carrier and adapted to swing to and from a position across said eye, a spring acting to hold said finger across the eye of the carrier, and a stop mounted on the frame of the machine, in the path of said linger as the carrier is turned about its axis, substantially as and for the purpose described.

6. In a broom sewing machine, thecombination with a pivotally mounted vise, suitable needles and thread carriers, and a vertically movable broom support arranged within the vise and having a rack connected therewith, of a single pawl adapted to engage said raclr to control the vertical position of the broom support, and means for disengaging said pawl from the rack prior to the formation of the lirst stitch in a row of stitches and causing it to rengage a higher tooth of the rack at the completion of the row of stitches.

7. In a broom sewing machine, the combination with suitable sewing mechanism, a pivotally mounted broom holding vise, means for rocking the vise about its pivot, and a vertically movable broom support arranged within the vise and having a rack connected therewith, of a pawl normally engaging said rack, means connected with the pawl and adapted to disengage it from the rack prior to the formation of the first stitch in a row of stitches, and means for causing the pawl to rengage the next highest toot-h of the rack after the completion of said row of stitches.

S. In a broom sewing machine, the combination with suitable sewing mechanism, a pivotally mounted broom holding vise, means for rocking the vise about its pivot, and a vertically movable broom support arranged within the vise and having a rack connected therewith, of a single pawl mounted on the vise and adapted to engage the rack to control the vertical position of the broom support, a spring acting to hold the' pawl in engagement with the rack and means for positively disengaging the pawl from the rack as the vise is adjusted to position to begin a row of stitches, said spring causing recngageinent of the pawl and rack as the step-by-step movements of the vise for cach row of stitches is completed.

9. In a broom sewing machine, the combination with suitable sewing mechanism, a pivotally mounted broom holding vise, means for rocking the vise about its pivot, and a vertically movable broom support arranged within the vise and having a rack connected therewith, of a pawl mounted onI the vise and adapted to engage the rack, a spring acting to hold the pawl in engagement with the rack, and a stop on the machine :trame adapted to disengage the pawl and rack as the vise moves to position for commencing a row of stitches.

l0. In a broom sewing machine, the combination with suitable sewing mechanism. a pivotally mounted broom holding vise, means for rocking the vise about its pivoty and a vertically movable broom support arranged within the vise and having a rack connected therewith, of a pawl mounted on the vise and adapted to engage Ithe rack, a lever fulcrumed on the vise and having one member engaging said pawl, a spring acting to hold the pawl in engagement with the rack, and a. stop on the. machine frame in the path of said lever, as the vise moves to posi tion for commencing` a row of stitches, whereby the pawl will. be disengaged from the rack prior to the formation of the first stitch.

1l. In a broom sewing machine, the combination withsuitable sewing mechanism, a pivotally mounted broom holdingl vise, means for rocking the vise about its pivot, and a vertically movable broom support arranged within the vise and having a rack connected therewith, of a pawl mounted on the vise and adapted to engage the rack, a spring acting to hold the pawl in engagement with the rack, a lever fulcrmned on the vise and having a loose connection at one end with said pawl, and a sto-p on the machine frame adapted to rock said lever to disengage the pawl from the raclr as the vise is rocked to position to commence a row of stitches,

l2. ln a broom sewing machine, the com bination with a suitable vise, needles, the vise being adapted to move transversely of the path of the needles, and a vertically movable. broom support arranged within the vise and having raclr connected therewith, of a pawl movable toward and from said rack and adapted to engage the several teeth thereof to support the broom support at different elevations, and means for disengaging the pawl from the racl prior to the formation of the first stitch in a row of stitches without opening` the vise, said pawl being caused to reugage a higher tooth of racl at the completion of a row of stitches.

1B. ln a broom sewing' machine, the conr bination with suitable sewing mechanism, a pivotally mounted broom holding vise, adapted to be rocked about its pivot during` the formation oit each row of stitches, a vertically movable broom support having a racl connected therewith, and a pawl normally engaging said rack, of means controlled by the movement of the vise about its pivot for disengaging said pawl and rack prior to the completion of a row of stitches and causing the rengagement thereof at a higher point on the rack at the completion of a row of stitches.

la. In a broom sewing machine, the combination with suitable sewing mechanism, a pivotally mounted broom holding vise, adapted to be rocked about its pivot during the formation of each row of stitches, a vertically movable broom support having a rack connected therewith, and a pawl normally engaging said rack, of means controlled by the movement of the vise about its pivot for disengaging said pawl and rack prior to the formation of the first stitch in i row of stitches and causing the rengagement thereof at a higher point on the rack at the completion of a row of stitches.

l5. ln a broom sewing machine, the combination with suitable sewing mechanism, a pivotally mounted broom holding vise, adapted to be rocked about its pivot during the formation of each row of stitches, a vertically 'iovable broom support having a rack connected therewith, and a pawl normally engaging said rack, of means adapted to be automatically actuated by each complete oscillatory movement of the vise about its pivot to effect a disengagement of said rack and pawl and rengagement thereof at a higher point on the rack.

16. In a broom sewing machine, the combination with suitable sewing mechanism, a pivotally mounted broom holding vise, adapted to rock about its pivot during the formation of each row of stitches, a vertially movable broom support carried by the vise, and devices mounted on the vise and broom support and normally in engagement to hold the broom support at any of several elevations, of means whereby each complete oscillatory movement of the vise about its pivot causes the disengagement of said devices and a rengagement thereof in a differcnt relation, for the purpose described.

1 7. ln a broom sewing machine, the combination with suitable sewing devices, a vise movable relative to the sewing devices dur ing the formation of a row of stitches, and a broom support carried by the vise and adapted to be adjusted vertically between successive rows of stitches, of means controlling such vertical adjustment of the broom support and adapted to eiect each of said adjustments by a plurality of vertical movements, one of which occurs while the vise is closed and the broom support held stationary thereby.

1S. In a broom sewing machine, the combination with avise, and a broom support carried by and adapted to be adjusted vertically relative to the vise, of a rack connected with the broom support, means on the vise cooperating with the rack to hold the broom support at the desired elevation, and means for causing a relative movement between said rack and holding means to vary the position of the broom support, a portion of such movement being eii'ected while the broom support is held stationary by the vise.

19. In a broom sewing machine, the combination with a vise, and a broom support carried by and adapted to be adjusted vertically relative to the vise, of a rack connected with the broom support and capable ot a limited movement longitudinally thereof, means on the vise adapted to engage the ack to hold the broom support at the desired elevation, and means adapted to cause the rack to move relatively to the broom support and said holding means while the vise maintains the broom support stationary and to cause a relative movement between the holding means and the rack and broom support when the latter is released by the opening of the vise.

20. In a broom sewing machine, the combination with suitable sewing mechanism, and a vise mounted to rock about a horizontal axis past the sewing mechanism, of means for imparting a step-by-step movement to the vise including a relatively stationary abutment, and an intermittingly movable sliding bar, an adjustable spacing device arranged between said abutment and bar, and means for automatically varying the lenOth of said spacing device in accordance with the thickness of the broom in the vise.

2l. In a broom sewing machine, the combination with suitable sewing mechanism, and a vise mounted to rock about a horizontal axis past the sewing mechanism, of means for impart-ing a step-by-step movement t-o the vise including an intermittingly movable sliding bar, an adjustable stop for limiting the movement of said bar, and means for automatically adjusting said stop to vary the extent of movement allowed said bar-in accordance with the thickness of the broom in the vise.

22. In a broom sewing machine, the combination with suitable sewing mechanism, and a vise mounted to rock about a horizontal axis past the sewing mechanism, of means for imparting a step-by-step movement to the vise including an intermittingly movable sliding bar, a lever bearing against a jaw of the vise and adapted to move therewith toward and from the other 7ise jaw,

and a stop for determining the extent of 28. In a broom sewing machine, the combination with suitable sewing mechanism, and a vise mounted to rock about a hori- Zontal axis past the sewing mechanism, of means for imparting a step-by-step movement to the vise including an intermittingly movable sliding bar, a lever bearing against a jaw of the vise and adapted to move therewith toward and from the other vise jaw, and a stop for determining the extent ot movement of the sliding bar, said stop including an adjustable member adapted to vary the length of the stop, and connect-ions between said adjustable member of the stop and said lever, whereby the length of the stop will be changed and the extent of movement permitted the sliding bar varied in accordance with the thickness of the broom in the vise.

24. In a broom sewing machine, the combination with suit-able sewing mechanism, and a vise mounted to rock about a horizontal axis past the sewing mechanism, of means for impart-ing a step-by-step movement to the vise including an intermittingly f movable sliding bar, a lever bearing against a jaw of the vise and adapted to move therewith toward and from the other vise jaw, and a stop for determining the extent of movement of the sliding bar, and having at its free end a rotatable section bearing against a cam surface on the body ot' the stop, and connections between said rotatable section of the stop and said lever whereby said section will be turned and the length of the stop varied in accordance with the eX- tent to which the vise is closed.

25. In a broom sewing machine, the combination with suitable sewing mechanism, a pivotally mounted broom holding vise, adapted to be rocked about its pivot during the formation of each row of stitches, a vertically movable broom support having a rack connected therewith, and a pawl normally engaging said rack, of means controlled by the movement of the vise about its pivot for automatically disengaging the pawl and rack and e'ecting a rengagement thereof at a higher point on the rack, whereby the broom support is caused to move vertically relative to the vise between the formation of successive rows of stitches.

26. In a broom sewing machine, the combination with suitable sewing mechanism, a vise movable transversely of the sewing iuechanism, a vertically movable broom support mounted in the vise, a rack, and a pawl cooperating with the rack, one of said cooperating elements being connected with the vise and the other with the broom support in such manner that when disengaged there will be a relative movement between them in the direction et the length of the rack, of means tor disengaging the pawl and rack while the vise is closed.

i7. .ln a broom sewin machine, the combination with suitable sewing mechanism, a vise movable transversely of the Sewing mechanism, a vertically movable broom support mounted in the vise, a rack, and a pawl cooperating with the rack, one of said cooperating elements being connected with tlre vise and the other with the broom support in such manner that when disengaged there will be a relative movement between them in the direction ot the length ot the rack, oit means actuated by the movements of the vise transversely oit the sewing mechanism tor disengaging the pawl and rack while the vise is closed.

2S. ln a broom sewing machine, the combination with suitable sewing mechanism, a vise movable transversely of the sewing mechanism, a vertically movable broom support mounted in the vise, a rack, and a pawl cooperating with the rack, one of said cooperating elements being connected with the vise and the other with the broom support in such manner that when disengaged there will be a relative movement between them in the direction of the length of the raclr, of means actuated by the movement-s of the vise transversely of the sewing mechanism for disengaging the pawl and rack while the vise is closed, said pawl and rack being restored to normal relation with each other and the broom support when the vise is opened.

29. In a broom sewing machine, the combination with suitable sewing mechanism, a pivotally mounted broom holding vise, adapted to be rocked about its pivot during the formation of each row of stitches, and a vertically movable broom support having a rack connected therewith, of a pawl having its upper end connected with the vise and its lower end provided with a tooth adapted to engage the rack, and means controlled by the movement of the vise about its pivot for causing said pawl to successively engage and disengage the rack, for the purpose described.

30. ln a broom sewing machine, the combination with suitable sewing mechanism, a pivotally mounted broom holding' vise adapted to be rocked about its pivot during the l'ormation of each row of stitches, and a vertically movable broom support, of a rack connected with the broom support and movable longitudinally relative thereto, a pawl normally engaging the rack, and means for disengaging the pawl and rack and permitting the latter to move longitudinally relative to the pawl and broom support while the vise is closed, the pawl and rack being retngaged at a dilierent point when the vise is opened.

3l. In a broom sewing machine, the combination with suitable sewing mechanism, a pivotally mounted broom holding vise adapted to be rocked about its pivot during the formation ot each row or stitches, and a vertically movable broom support, of a rack connected with the broom support and movable longitudinally relative thereto, a pawl normally engaging the rack, and means controlled by the movement ot the vise about its pivot for disengaging the pawland rack and permitting the latter to move longitudinally relative to the pawl and broom support while the vise is closed, the pawl and ack being reengaged at a dierent point when the vise is opened.

32. In a broom sewing machine, the combination with suitable sewing mechanism, a broom holding vise movable transversely of the sewing mechanism, and a vertically movable broom support arranged within the vise, of a rack, a hanger supporting said rack and having at its upper end separated lugs extending above and below a rib on the broom support, the space between the lugs being greater than the thickness of the rib, a pawl mounted on the vise and normally engaging the rack and holding the latter in such position that its hanger engages the lower side of said rib, and means Yfor disengaging the pawl and raclr while the vise is closed, to permit the rack to move downwardly until its hanger engages the upper tace of said rib, the pawl being reengaged with the rack and the hanger thereof restored to its normal position relative to the vise when the latter is opened.

ln testimony whereof we ailix our signatures in presence et two witnesses.

CHARLES E. OYLER. JOHN HENRY PARKER. vWitnesses l-lowann l). ADAMS, EDMUND llfiloCArrnaY.

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