US2542686A - Twisting control mechanism for brushmaking machines - Google Patents

Description

1951 A. L. LE FEBVRE ETAL 2,542,636

TWISTING CONTROL MECHANISM FOR BRUSH MAKING MACHINES 5 Sheets-Sheet 1 Filed 0st. 3. 1947 Feb. 20, 1951 A. L. LE FEBVRE ETAL 2,542,686

TWISTING CONTROL MECHANISM FOR BRUSH MAKING MACHINES Filed Oct. 3, 1947 er [Him i '9) fauveulon EarZ :IG'aZia' y 5%.,

Feb. 20, 1951 LE FEBVRE ETAL 2,542,686

TWISTING CONTROL MECHANISM FOR BRUSH MAKING MACHINES Filed Oct. 5, 1947 5 Sheets-Sheet 4 I 3: vein 307's @WecZL-L eFeavre Miz i'owfifi 8370223 Ear-2 J Ga 22332 Feb. 20, 1951 A. L. LE FEBVRE ET AL 2,542,636

TWISTING CONTROL MECHANISM FOR BRUSH MAKING MACHINES Filed Oct. 3, 1947 5 Sheets-Sheet 5 /64 v mg /as Patented Feb. 20, 1951 TWISTIN G CONTROL MECHANISM FOR BRUSHMAKING MACHINES Alfred L. Le Febvre and Milton H. Strong, Windsor, and Earl J. Gatting, Manchester, Conn., asslgnors to The Fuller Brush Company, Hartford, Conan, a corporation oi Connecticut Application October 3, 1947. Serial No. 777,778

1 29 Claims.

A mechanism embodying the present invention is particularly adapted for use as a part of a brush making machine of the type disclosed in the application of Alfred L. Le Febvre for Brush Making Machine. Serial No. 666,735, filed May 2. 1946. Reference is made to the said application for various features of the machine not herein fully shown and described.

In a machine of the type referred to two aligned wire gripping devices are provided, these being adapted to engage two superposed wires with a transverse layer of fibers interposed between them. The wire gripping devices are relatively rotatable and preferably one of the said devices is a nonrotatable vise and the other of the said devices is a rotatable chuck. The wire gripping devices initially grip the wires near the ends of the layer of bristles and when the chuck is rotated the wires are twisted to engage and hold the fibers. During twisting one of the gripping devices is longitudinally movable toward the other gripping device in accordance with the shortening of the effective length of the wires due to the twisting. Preferably itis the chuck that is longitudlnally movable as stated. After the primary twisting of the wires as above described it is necessary for the gripping devices to release the wires and reengage them near the ends thereof. Thereafter the chuck is again rotated to twist the end portions of the wires and the visa is again longitudinally moved toward the chuck in accordance with the further shortening of the eilective length of the wires.

One of the objects of the present invention is to provide means for controlling the movement of the vise when the wires are released by the gripping devices so that the said devices may be reengaged with the wires near the ends thereof. In accordance with the invention one wire gripping device first releases the wires and a relatively movable abutment properly limits the longitudinal outward movement of the vise. Thereafter the other wire gripping device releases the wires, and further longitudinal outward movement of the vise is properly limited by stationary abutment.

A further object of the invention is to provide means whereby the relatively movable abutment is withdrawn from its operative position automatlcally upon the release of the wires by the second wire gripping device.

A still further object of the invention is to provide means whereby longitudinal outward movement of the bodily movable gripping device upon release of the wires after final winding is stopped at a position diflerent from either of the positions in which it is stopped to enable the wire gripping devices to reengagc the wires.

A still further object of the invention is to provide means for stopping the relative rotation between the gripping devices after the primary twisting and after the twisting of the end portions of the wires.

Other objects of the invention will be apparent from the drawings and from the following specification and claims.

In the drawings we have shown in detail a preferred embodiment of the invention, but it will be understood that various changes may be made from the construction shown, and that the drawings are not to be construed as defining or limiting the scope of the invention, the claims forming a part of this specification bein relied upon for that purpose.

Of the drawings.

Fig. 1 is a plan view of a brush twisting mechanism embodying the invention, this mechanism constituting a portion of a complete brush making machine.

- Fig. 2 is a front view of the mechanism shown in Fig. 1.

Fig. 3 is an enlarged transverse vertical sectional view taken along the line 3-3 of Fig. 2.

Fig. 4 is a fragmentary longitudinal vertical sectional view taken along the line 4-4 of Fig. 3.

Fig. 5 is a fragmentary detail view of certain parts appearing in Fig. 3, but with the parts in different relative positions.

Fig. 6 is an enlarged left end view of the mechanism shown in Figs. 1 and 2.

Fig. 7 is an enlarged fragmentary horizontal sectional view taken along the line 1-1 of Fig. 2.

Fig. 8 is a horizontal sectional view on a scale larger than that of Figs. 1 and 2 but smaller than that of Figs. 3 to 7. this view being taken partly along the center line of the wire gripping devices and partly alon the line 1-1 of Fig. 2.

Figs. 9, l0 and 11 are views similar to Fig. 8 but showing the wire gripping devices in plan and showing the several parts in different relative positions.

Fig. 12 is a fragmentary vertical sectional view taken along the line i2-I2 of Fig. 10.

Fig. 13 is a view similar to Fig. 12 but showing the parts in different relative positions.

Fig. 14 is a fragmentary plan view similar to a portion of Fig. 1, but showing the parts in relative positions corresponding to the relative positions shown in Fig. 9.

Fig. 15 is a fragmentary plan view similar to Fig. 14, but showing the parts in relative posi.

tions corresponding to the relative positions shown in Fig. 11.

Referring particularly to Figs. 1 and 2, the machine comprises a main bed or base It. While the invention is not necessarily so limited. most of the parts to be herein specifically described are shown as being mounted on a slide II which is horilontally movable forward and rearward on the base ill along a guideway ll.

Mounted on the slide it is a bracket l8 and a carrier is is supported by the bracket it. the carrier being vertically movable with respect to the bracket by manually operable means, not shown. Associated with the carrier 18 is a. twisting mechanism comprising two wire gripping devices Ill and 82 respectively positioned near the ends of the carrier, provision being made for relative rotation between the said gripping devices. Preferably and as shown, the gripping device 88 is a nonrotatable vise and the gripping device I! is a rotatable chuck. The nonrotatabie vise 88 is initially in a position toward the left from that shown in Figs. 1 and 2. As already stated, the carrier is is movable vertically, and it is shown in Fig. 2 in its lowermost position. When the carrier is in its uppermost position the top thereof is approximately at the axis of the wire gripping devices 20 and 28.

With the carrier in its uppermost position, and with the vise 28 in its said position toward the left. the slide it is moved rearward and again forward. the carrier and the twisting mechanism being movable with it. During the rearward and forward movements two superposed longitudinal wires and an interposed layer of transverse brush fibers are placed on the carrier II. the ends of the wires extending beyond the layer of fibers and into the gripping devices so as to be adapted to be engaged thereby. In order that the left ends of the wires may enter the nonrotatable vise 28, the said vise is provided at the top thereof with a wire receiving slot 24. In order that the right ends of the wires may enter the rotatable chuck 22, the said chuck is provided with a wire receiving slot 25. Prior to the placing of the wires, the chuck 2! is turned manually or otherwise so that the wire receiving slot 28 is at the top as shown in Fig. l. The wires and the fibers are in place and ready for twisting when the carrier and the twisting mechanism reach their forward positions after rearward movement. The wires and the fibers are not shown in their initial positions. but in Figs. 8 to 11 the twisted wires are marked W and the fibers are marked F.

The vise 28 is at the right end of a longitudinally movable slide 28 which is supported by and guided in a bracket 80 secured to the main slide l2. As shown more clearly in Fig. 8;the vise 28 comprises transversely movable wire engaging laws 82. 82 which are movable inward to their wire engaging positions by means of pivoted levers ll, 84. The levers 88. 84 carry rollers 88, 88 at their left ends and a longitudinally movable rod 38 is provided having a tapered head 8 at its right end which is adapted to be forced between the rollers 88, 88 as shown in Fig. 8. When the head 48 on the rod 88 is between the rollers, the jaws I2. 82 are forced into gripping engagement with the wires W. When the rod 88 and its head II are moved toward the left. the lovers ll. I4 can swing inward under the action of biasing springs l2, 42 so as to separate the laws 82, I2 and release the wires. For operating the rod 88 there is provided a forward extending hand lever ll which is pivoted at 48 on the slide 88. The lever preferably has a downward on'set as shown at 48 in Figs. 2 and 3. The operator, by movirm the lever M, can actuate the vise 20 to grip the wires or to release them, the Wire! in engaged when the lever is moved toward the left and disengaged when the lever is moved toward the right.

The slide 28 is biased for movement away from the chuck 22, that is. toward the left, and this movement will be referred to as "outward" movement. The biasing of the slide is preferably effected by means of a chain 48 to which is attached a suitable weight, not shown. The chain passes over pulleys 58 and ii on a bracket 52 secured to the main slide i2. As already stated, the vise 28 is initially at the left of the position shown in Figs. 1 and 2, being within the guideway in the bracket 88. In order that the left ends of the wires may enter the slot N in the vise, the bracket 88 is provided at the top with a slot 68 positioned to register with the said slot ll.

The rotatable chuck if is carried by a rotatable spindle 88 mounted in bearing brackets 62 and 84 on the main slide it. Mounted on the spindle 68 for relative rotation is a belt pulley 68, this pulley being driven by belts 88, 68 passing over a suitable drive pulley which is not shown, but which is mounted on the main slide i2 and bodily movable rearward and forward in unison therewith. A clutch 18 is provided for operatively connecting the pulley 66 with the spindle G8, this clutch having a grooved collar 12 into which project pins or rollers carried by a pivoted yoke ll. The yoke 14 is pivoted at it to a bracket [8 carried by the main slide i2. Connected with the yoke ll below the pivot 18 is a longitudinally movable rod which serves to turn the yoke about its pivotal axis and to move the collar 12 longitudinally so as to engage or disengage the clutch Ill. The construction of the clutch is such that movement of the rod 80 toward the left effects engagement and that movement of the rod toward the right eiiects disengagement.

As shown more clearly in Fig. 8, the rotatable chuck 28 comprises transversely movable wire engaging laws 82, 8! which are movable inward to their wire engag fl positions by means of pivoted levers BI, 84. The levers 84, 84 carry rollers 88. 86 at their right ends and a longitudinally movable rod 88 is provided having a tapered head 88 at its left end which is adapted to be forced between the rollers 88, 86, as shown in Fig. 8. When the head 98 on the rod 88 is between the rollers 88, 88, the jaws 82. 82 are forced into gripping engagement with the wires W. When the rod 88 and its head 90 are moved toward the right, the levers 84. 84 can swing inward under the action of biasing springs 92, 92 so as to separate the Jaws 82. 82 and release the wires. For operating the rod 88 there is provided a lever 94 which is pivoted at 98 between its ends on an extension on the bracket 64. The upper end of the lever ill is connected with the rod 88 in a manner permitting the rod to rotate with the spindle 58. Connected with the lower end of the lever 84 is a longitudinal link 88 which is pivoted at its left end to a forward extending hand lever m, the said hand lever being pivoted at M2 to a bracket on the main slide If. The operator, by moving the lever Hi0, can actuate the chuck 22 to grip the wires or to release them, the wires being engaged when the lever is moved toward the left and discussed when the lever is moved toward the right.

A hand wheel I84 is secured to the spindle I and serves as a means for manually rotating the spindle and chuck.

. For the initial twisting of a brush. the vise I0 is toward the left of the position shown in Figs. 1 and 2, the end face of the visa being substantially flush with the adjacent face of the bracket 88. The chuck 22 is manually turned by means of the hand wheel I84 so that the slot 28 therein is at the top. The carrier I8 is elevated from the position shown in Fig. 2 so that the top thereof is approximately at the center line of the vise and the chuck. With the parts in the relative positions described, the slide I2 and the several parts carried thereby are moved first rearward and then forward. As they move rearward a wire is placed in longitudinal position on the carrier I8. At or near the rearward positions a layer of transverse fibers is placed on the carrier II above the before-mentioned wire. As the parts move forward a second longitudinal wire is placed on the carrier, this wire being above the first-mentioned one and above the layer of 'fibers. It will be understood that the two wires are entered in the vise and in the chuck through the slots 24 and 26 that are provided for that purpose.

When the slide I2 and the parts thereon have returned to their forward positions with the superposed wires and with the interposed layer of transverse fibers in place on the carrier I8. the levers 44 and I80 are manually moved toward the left to the positions shown in Fig. l to cause the vise and the chuck to grip the ends of the wires. The carrier I8 is manually lowered to the position shown in Fig. 2 so as to provide room for the twisting operation. Then the clutch I8 is manually engaged to rotate the spindle 80 and the chuck 22. Rotation of the chuck 22 causes the wires to be twisted in the usual manner for brushes of this type. the fibers being gripped between the wires and relatively rotated. The twisting of the wires causes a shortening of the brush, the vise 20 being drawn toward the right against the resistance offered by the chain it and the weight, this movement of the vise continuing until it reaches the position shown in Figs. 1 and 2. Thereupon the clutch I0 is disengaged by automatic mechanism to be presently described. The initial twisting has now been completed and the brush and the various parts of the machine are in the positions shown in Figs. 1, 2 and 8.

For operating the clutch III there is provided a longitudinally movable rod I06 which extends through bearing apertures in the bracket 89, as shown most clearly in Fig. 4. The rod I06 is connected with the rod 80 by means of a threaded member I88 shown in Figs. 1 and 2. Secured to the rod I06 is an arm I III which extends downward through slots in the bracket 38 and in the main slide I2. As shown in Fig. 2, a transverse rockshaft I I2 is mounted in the base Ill. An arm H4 is splined to the rockshaft, being movable along the shaft in accordance with transverse movement of the slide I2 and of the parts carried thereby. The said arm H4 is operably connected with the arm IIII on the rod I06. Also connected with the rockshaft H2 is an arm Iii, a downward extending link 8 being connected with the arm. The link H8 is connected at its lower end with a foot treadle, not shown. It will be seen that when the link H8 is moved downward by the foot treadle, the rockshaft III and the arm H4 are moved in the counterclockwise direction, thus moving the arm Ill and the rod I 88 toward the left. Movement of the rod I08 toward the left moves the rod 88 toward the left to eflect engagement of the clutch ID. A spring I28 surrounds the rod I88 and serves to bias the arm II! and the rod I08 toward the right. Movement toward the left to cheat engagement oi the clutch is in opposition to the spring I 28.

Secured to a transverse rockshaft I22 in the bracket 20 is a bell crank latch I24 which is biased for movement in the counterclockwise direction by a spring I26. One arm of the latch I24 extends toward the left and is provided with a notch adapted to receive a block I28 carried by the arm IIO. As soon as the arm H0 and the rod I88 have been moved suiiiciently to'the left to engage the clutch, the latch I24 engages the block I28 to retain the parts in their clutch engaging positions.

Preferably, the rockshaft I22 carries an arm I38 at the front thereof which is adapted to be manually engaged for turning the rockshaft and releasing the latch to disengage the clutch. The arm I is not used during normal operation of the machine, and it is provided merely for emergency use or for use during preliminary set-up and adjustment of the machine.

Secured to a downward extension I32 on the slide 28 at the rear thereof is a longitudinal rod I84. This rod extends toward the right through a bearing aperture in the bracket 30, as shown in Fig. 4. As already stated, the vise 20 and the slide 28 are drawn toward the right by reason of the shortening of the brush resulting from the twisting of the wires. The rod I36 is movable with the slide 28 and the length of the rod is such that it engages the latch I24 to move it in the clockwise direction when the wires have been sufficiently twisted. As the latch I24 moves in the clockwise direction, it disengages the block I28, thus permitting the spring I28 to move the parts toward the right and disengage the clutch "I. Fig. 4 shows the parts in the position which they occupy immediately before the release of the latch I24 by reason of the enagement therewith of the rod I34.

Fig. 8 shows the brush and the various parts of the machine in the positions which they occupy upon the completion of the initial twisting operation, and it may be assumed that the clutch III has been automatically disengaged so that the chuck 22 is not rotating. It is necessary to supplementally twist the wires W at the end portions thereof and the present invention relates primarily to means for facilitating and controlling the supplemental twisting. In order to effect supplemental twisting of the end portions of the wires it is necessary to release the vise and the chuck from their engagement with the wires, as shown in Fig. 8, and to reengage them with the wires near the extreme ends thereof. Preferably and as shown, the chuck is first actuated to release and reengage the wires. and then the vise is actuated to release and reengage the wires. However, the invention is not necessarily limited to this sequence.

Secured to the said downward extension I32 on the slide 28 at the front thereof is a longitudinal rod I86. This rod extends toward the right through a bearing aperture in the bracket 80, as shown in Figs. 7, 8, 9, 10 and 11. A collar I38 is secured to the rod I36 at the right end thereof, this collar serving sis a stop in the manner to be explained.

Extending through suitable bearing apertures in the bracket is a longitudinal rockshaft I40. This rockshaft is preferably extended at the left and it extends through a bearing aperture in a bracket I42 secured to the main slide I2. Secured to the rockshaft I40 is an upstanding arm I44 carrying a rearward projecting block I45, the said block being slotted to receive and embrace the rod I35 when the arm is in its rearmost position, as shown in Fig. 3. An upstanding arm I40 is secured to the shaft I40 at the right end thereof and a tension coil spring I50 is connected with the arm I40, the said spring tending to bias the shaft I40 and all parts carried thereby in the clockwise direction as viewed in Fig. 3. The arm I44 preferably carries a knob I52 by means of which the arm can be manually swung forward in opposition to the spring I50. With the parts in the positions shown in Fig. 8 with the initial twisting completed, the arm I44 is in its rearward position with the block I45 interposed between a boss I54 on the bracket 30 and the said collar or stop I35 on the rod I35.

Assuming the parts to be in the position shown in Fig. 8, the operator first moves the hand lever I00 toward the right to disengage the chuck 22 from the wires. As soon as the chuck 22 disengages the wires, the slide 25 and the vise 20 and the brush are moved toward the left by the chain 40 and the weight until the stop I35 on the rod I35 engages the block I43 on the arm I44 as shown in Fig. 9. The right face of the interposed block I45 serves as an abutment in the path of movement of the stop I30 to prevent any further movement toward the left, the said block I45 constituting a spacer between the boss I54 and the stop I35. As soon as this movement has taken place the operator moves the lever I00 toward the left to reengage the chuck 22 with the wires, the wires being reengaged near the extreme right ends thereof.

With the parts in the positions shown in Fig. 9, the arm I44 is swung forward to withdraw the block or spacer I45 from its position between the boss I54 and the stop I30. The operator moves the lever 44 toward the right to disengage the vise 20 from the wires. the vise 20 then being moved toward the left by the chain and the weight until the stop I35 directly engages the boss I54, as shown in Fig. 10. The boss I54 serves as a second abutment for the movable stop I30. Then the lever 44 is moved toward the left to reengage the vise 20 with the wires, the wires being reengaged near the extreme left ends thereof. It will be apparent that as soon as the stop I30 has moved toward the left from the position shown in Fig. 9, the arm I44 may be released for rearward movement by the spring I55. The rear of the block I45 will engage the side of the stop I35 to limit rearward movement.

With the parts in the positions shown in Fig. 9, the arm I44 and the block I45 may be moved forward manually by engaging the knob I52. Preferably, however, means is provided for causing the arm I44 and the block I45 to be moved forward automatically upon movement of the lever 44 toward the right to disengage the vise. Secured to the rockshaft I40 near the left end thereof is an upstanding arm I55. Secured to the hand lever 44 is an arm I50 having a flange I50 which is positioned behind the arm I55 when the hand lever is in the position to eflect engagement of the vise 20. The relationship of the flange I50 with the arm I55 is clearly shown in Fig. 6, and also in Fig. 14. With the parts in the positions shown in Figs. 9 and 14 movement of the lever 44 toward the right causes the flange I50 on the arm I50 to move the arm I55 toward the front, thus rocking the shaft I and moving the arm I44 and block or spacer I40 forward. In this way the block or spacer I is automatically withdrawn from its interposed position between the abutment I54 and the stop I30 when the lever is moved to disengage the vise. When the lever 44 is again moved toward the left to effect reengagement of the vise, the arm I44 is permitted to move rearward until the rear ofthe block I40 engages the side of the stop I55.

When the parts have been moved to the positions shown in Fig. 10 with the chuck and the vise in engagement with the ends of the wires, the clutch 10 is again engaged by means of the foot treadle and the chuck 22 is rotated to twist the end portions of the wires. The latch I24 again engages the block I25 to hold the parts in clutch engaging positions.

The twisting of the end portions of the wires again shortens the brush and draws the vise 20 and the slide 25 toward the right to the positions shown in Fig. 11, the rod I34 again moving toward the right in unison with the movement of the vise and the slide. However, at the beginning of the said movement toward the right, the rod I34 is in the position shown in Fig. 10, which is toward the left from the position shown in Fig. 8, and the rod cannot directly engage the latch I24 to release it in the manner previously described. In order that the latch I24 may be again automatically moved by the rod I34 to again disengage the clutch 10, there is provided a mechanism which will be now described.

Mounted in suitable bearing apertures in the rear portion of the bracket 30 is a longitudinal rockshaft I52. Secured to the rockshaft I52 is an upstanding arm I54. A transverse link I55 is pivotally connected at its front end with the arm I40 on the rockshaft I40 and is pivotally connected at its rear end with the arm I54 on the rockshaft I52. By means of the connection described, the rockshait I52 is rocked in unison with the rockshait I40. Secured to the rockshaft I52 is an arm I50. Also mounted on the rockshaft I52 is an arm I10. The arm I10 is immediately adjacent the arm I50 and can freely turn relatively thereto within narrow limits. A spring I12 connected with a longitudinal pin I13 on the arm I55 serves to bias the arm I10 for movement in the counterclockwise direction with respect to the said arm I65.

Carried by the upper forward end of the arm I10 is a longitudinally movable pin or spacer I14, a spring I15 being provided for biasing the pin I14 toward the left. Preferably, the pin I14 comprises a main body with a screw I15 entered in a threaded opening therein, as shown in Fig. 10. By turning the screw, the eflective length of the pin may be changed. The screw I15 is functionally a part of the pin, and further references to the pin I14 will be understood as including the screw.

When the arm I44 is in its rearward position, as shown in Fig. 3, the arms I50 and I10 are also in their rearward positions and the pin I14 is out of register with the rod I34 as shown in the rearward position in the said figure. However, when the arm I44 is moved to a forward position, as shown in Figs. 3 and 10, the arms I55 and I10 are also moved to forward positions so that the 9 pin I14 is or may be in register with the rod I34 as shown in Fig. 10. When the pin I14 is in register with the rod I34, it is interposed between the end of the said rod and the latch I24. As the rod I34 moves toward the right in accordance with the movement of the slide 28 resulting from the shortening of the brush during final twisting, the rod I34 moves the pin I14 longitudinalli. to push it against the latch I24, thus moving the latch in the clockwise direction and causing the disengagement of the clutch 18 in the manner already described. As the pin I14 moves, the spring I18 is compressed, and when the arm I18 and the pin are restored to their positions at the rear, the spring I18 moves the pin toward the left to its original position with respect to the arm, as shown in Fig. 11. The several parts are so adjusted that the clutch is disengaged after the required amount of flnal twisting has been effected.

When the arm I44 is first moved forward. the rod I34 is still approximately in the position shown in Fig. 9, or somewhat to the left thereof, the rod thus preventing the arm I18 and the pin I14 from moving to their completely forward positions as shown in Fig. 10. The interference of the rod I34 with the forward movement of the arm I18 is shown in Fig. 5, and it is evident th t the spring I12 will yield so that the arm I18 does no move forward to the same extent as does the arm I68. However, as soon as the rod I34 has moved sufllciently toward the left, the spring I12 moves the arm I18 and the pin I14 to their fully forward positions, as shown in Fig. 10.

As has already been stated, the twisting of the end portions of the wires draws the vise 28 and the slide 28 toward the right from their extreme left positions as shown in Fig. 10 to an intermediate position as shown in Fig. 11. The movement of the slide toward the right eflects disengagement of the clutch 18 at the proper time as already described. and it also moves the stop I38 toward the right to the postion shown in Fig. 11.

Preferably, the block I48 carries a relatively narrow flange I18 which projects toward the rear and is immediately adjacent the abutment 154. The main body of the block constitutes a wide portion thereof and the flange I18 con titutes a narrow portion thereof. With the parts in the positions shown in Fig. 10, it is the flange or narrow portion I18 that engages the side of the stop I38 to prevent rearward movement of the block I46 and of the arm I44. This engagement is clearly shown in Fig. 12. However, asthe stop I38 moves toward the right to the position shown in Fig. 11, the flange or narrow portion I18 no longer engages the side of the stop, and the block I45 and the arm I44 are swung rearward by the spring I58 to the positon shown in Figs. 11 and 13. Further rearward movement is prevented by the engagement of the main rear face of the spacer with the side of the stop. It will be seen that with the parts in the intermediate positions shown in Figs. 11 and 13, the flange or narrow portion I18 is interposed between the stop I38 and the abutment I54. The flange I18 is in the path of movement of the stop I38 and constitutes a third abutment therefor.

The length of the pin I 14 is such that the clutch is disengaged at or about the instant that the flange or narrow portion I18 is moved rearward between the stop I38 and the abutment I84, that is, when it is moved from the position shown in Fig. 12 to the position shown in Fig. 13. The rearward movement of the flange and of the arm right to the positions I44 causes the arm I18 and the pin I14 to be moved rearward to the position shown in Fig. 11, the pin I14 then being out of register with the rod I34. When the clutch has been disengaged and the rotation of the chuck has been stopped, the stop I38 is slightly separated from the flange or third abutment I18, as shown in Fig. 11.

As soon as the flnal twisting has been completed and the parts have reached the position shown in Fig. 11, the operator moves the levers 44 and Ill toward the right to disengage the vise and the chuck from the wires. When the vise and the chuck are so disengaged the slide and the chuck are moved slightly toward the left by the chain and the weight from the position in Fig. 11. The movement toward the left is limited by the engagement of the stop I38 with the third abutment I18 on the block I46. This locates the vise 28 in the proper position for receiving the wires of the next following brush.

The completed brush is removed and the operations already described are repeated for the assembling and twisting of the next following brush. The twisting of the next following brush moves the vise 28 and the slide 26 toward the shown in Figs. 1, 2 and 8 and as soon as the stop I38 moves far enough to clear the block I46, the said block is restored by the spring I58 to its position wherein the wide main body thereof is interposed between the abutment I84 and the stop I38, as shown in Fig. 8. At the same time the arm I18 and the pin I14 are returned to their rear positions as shown in Fig. 8.

As has been explained, mechanism is provided enabling the lever 44 for operating the vise 28 to withdraw the block or spacer I48 substantially simultaneously with the release of the wires by the vise. Specifically and with the parts in the positions shown in Fig. 9, the arm I44 and the block I46 are moved forward by reason of the engagement of the flange I68 on the lever 44 with the arm I56 on the rockshaft I48. This occurs when thearm I44 is moved to disengage the wires, with the vise in the position shown in Fig. 9. The relative positions of the said flange I88 and the said arm I56 are shown in Fig. 14. However, when the parts are moved to the positions shown in Fig. 11, the lever 44 must be again moved to disengage the wires so as to permit removal of the completed brush, and it is necessary to provide means for rendering the aforesaid mechanism inoperative so that the spacer will not be again withdrawn. If the flange I88 were to again engage and move the arm I56, the block I46 would be moved forward so as to w'thdraw the flange or second abutment I18 thereof from its position between the abutment I54 and the stop I38. This would permit the stop I38 to move into direct engagement with the abutment I84 and the vise 28 would be too far outward, or to the left, for the making of the next following brush.

In order that the block I48 may not be withdrawn when the lever 44 is moved with the parts in the position shown in Fig. 11, the said flange 88 is of such a length that it clears the arm I88 as shown in Fig. 15. It will be seen that when the flange I68 is in the position shown in Fig. 15, it is at the left of the arm I56. This permits the lever 44 to be moved for releasing the finished brush and for engaging the wires of the next following brush, without any engagement of the flange I68 with the arm I56.

The wires W may occasionally break during final twisting, and in such event the vise and 1 i2 slidearenotdrswntowardtherightsossto bodilymovableiongitmmalmmeansbiasinsthe Wflmt the sense i en r we the mil bodily movable pping device outward away ill and the abutment I. The clutch must be from the other gripping device, means ior electmanually disengaged by means or the arm ill ing relative rotation between the grinnin deand when the vise and chuck release the damaged vices to cause primary twisting oi the wires bebrush the vise and slide and associated parts tween the said positions of initial engagement vise is is too far to the left fOI' prop r initial grinnin device to move inward in opposition to gagement with the wires of the next following the biasing means, means for releasing one gripbrush. A similar condition is encountered when m ing de m t w and (or Waging the relative proportions of the brush being made therewith. a stop movable with the bodily movare such that the shortening due to dual twisting able gripping device, n abutment movable mm is insumcient to move the vise and slide to the and out of the path of movement of the stop, the positions shown mm. 11 with the flange or abutsaid movable abutment when in the said path ment I'll entered between the stop ill and the is engaging the stop to limit outward movement oi abutment III. For some brushes the flange or the bodily movable gripping device at a predeterabutment ilt may be substantially thicker than mined osition when the wires are released by that shown. the last aforesaid gripping device so that the said In order to insure the eventual movement 0! device reengageg the wires near the orre ondthe parts to the positions shown in Fig. 11, the w lng ends thereof, means for releasing the second slide is may be provided with a roller use as gripping de i e m t ir and for shown in Figsl. 2. 14 an A onary ing it therewith, a stationary abutment in the cam plate I" is provided. this bein supported path'oi movement of the stop. and means for by means not shown on the base Ill of the mamoving the movable abutment out of the said chine. If, upon the completion of a cycle of as path of stop movement to enable the stationary operations, the vise and the slide are toward the abutment to engage the stop and limit additional left from the positions shown in Fig. 11, with the outward movement of the bodily movable gripstop Ill directly engaging the abutment its, theping device at a second predetermined position roller its will be in or near engagement with when the wires are released by the second aforethe cam plate III. when the main slide it and go said gripping device so that the said gripping the par ther n m v r s-" e making device reengages the wires near the correspond of the next following brush, the roller I80 travels ing opposite ends thereof. along the edge 0! the cam plate III. This en- 3. A brush making machine as set forth in gagement of the roller with the cam plate forces claim 2, including means operable by the second the slide is and the vise 20 toward the right so as said releasing and reengaging mean for movthat the various parts are moved approximately ing the said movable abutment out of the path to the relative positions shown in Fig. 11. Thus or the stop substantially simultaneously with the the parts are properly positioned for the making release of the corresponding gripping device. of the next following brush, even though the 4. In a brush making machine, the combinaparts have not been moved to the position shown so tion of two devices for gripping brush wires at in Fig. 11 by the shortening of the brush due to positions spaced from the ends thereof one oi.

twisting of the wires. which devices is a nonrotatable vise biased for what we claim is: longitudinal outward movement and the other 1. In a brush making machine, the combinaof which devices is a rotatable chuck serving tion of two devices initially positioned for re- 4 upon rotation to client primary twisting of the leasably gripping brush wires at positions spaced wires between the said positions of engagement, from the ends thereof one of which devices is a stop longitudinally movable with the vise, a bodily movable longitudinally, means biasing the stationary abutment engageable by the stop, a bodily movable gripping device outward away spacer initially interposed between the abutment from the other gripping device. means for effectand the stop, operating means for causing one ing relative rotation between the gripping devices of the wire gripping devices to release and reto cause primary twisting of the wires between engage the wires, the vise upon release of the the said positions of initial engagement, the wires moving longitudinally until the stop entwisting action causing the bodily movable gripgages the spacer so that reengagement of the ping device to move inward in opposition to the 5 wires is at a position closely adjacent the ends biasing means, means for releasing one gripping thereon, means for withdrawing the spacer from device from the wires and for reengaging it thereits interposed position after the said release and with, means for limiting outward movement of reengagement, operating means for causing the the bodily movable gripping device at a predeterother wire gripping device to release and reengage mined position when the wires are released by 50 the wires, the vise upon the last said release of the last aforesaid gripping device so that the the wires moving longitudinally until the stop said device reengages the wires near the corengages the abutment so that the last said reresponding ends thereof, means for releasing the engagement of the wires is at a position closely se nd r ppin d e fr m h Wire and for adiacent the ends thereof, and means operable reenga in it therewith, and means for limiting after reengagement of the wires by both devices additional outward movement of the bodily movf r rotating th m k t na t twi ting of the able gripping device at a second predetermined end portions of th wires, position when the wires are released by the 560- 5. A machine as set forth in claim 4, wherein ond aforesaid grippin d vic s h the Said the spacer is biased toward its interposed position fl ppin device reengoges the Wire n ar he cor- 7 so that upon the release thereof after movement responding opposite ends thereof. out of such position it enga es the side of the 2. In a brush making machine. the com inastop and so that upon inward movement of the tion of two devices initially positioned for reis a d t th spacer 13 returned in t my leasably gripping brush wires at positions spaced posed position.

from the ends thereof one of which devi es is It 6. A machine as set forth in claim 4, wherein 13 means is provided enabling the second said operating means to also move the spacer out of its interposed position.

'7. In a brush making machine, the combination of two devices for gripping brush wires at positions spaced from the ends thereof one of which devices is a non-rotatable vise biased for longitudinal outward movement and the other of which devices is a rotatable chuck serving upon rotation to eii'ect primary twisting of the wires between the said positions of engagement, 2. stop longitudinally movable with the vise, a stationary abutment engageabie by the stop, a spacer initially interposed between the abutment and the stop, an arm connected with the spacer for moving it, operating means for causing one of the wire gripping devices to release and reengage the wires, the vise upon release of the wires moving longitudinally until the stop engages the spacer so that reengagement of the wires is at a position closely adjacent the ends thereof, a lever movable in one direction to cause the other wire gripping device to release the wires and movable in the opposite direction to cause the said device to reengage the wires, means movable with the last said layer for engaging the said arm to withdraw the spacer from its interposed position substantially simultaneously with the last said release of the wires to enable the vise to move longitudinally until the stop engages the abutment so that the last said reengagement of the wires is at a position closely adjacent the ends thereof, the last said means disengaging the arm upon movement of the lever in the said opposite direction so as to permit the spacer to remain in its withdrawn position, and means operable after reengagement of the wires by both devices for rotating the chuck to effect twisting of the end portions of the wires.

8. A machine as set forth in claim 7, wherein means is provided for biasing the spacer toward its interposed position so that upon disengagement of the arm by the moving means therefor the spacer moves into engagement with the side of the stop and so that upon movement of the vise and stop in the inward direction the spacer is returned by its biasing means to its interposed position.

9. In a brush making machine, the combination of two devices for gripping brush wires at positions spaced from the ends thereof one of which devices is a nonrotatable vise biased for longitudinal outward movement and the other of which devices is a rotatable chuck serving upon rotation to effect primary twisting of the wires between the said positions of engagement, a stop longitudinally movable with the vise, a stationary abutment engageable by the stop, a spacer initially interposed between the abutment and the stop. operating means for causing one of the wire gripping devices to release and reengage the wires. the vise upon release of the wires moving longitudinally until the stop engages the spacer so that reengagement of the wires is at a position closely adjacent the ends thereof, operating means for causing the other wire gripping device to release and reengage the wires, mechanism enabling the last said operating means to withdraw the spacer from its interposed position substantially simultaneously with the last said release of the wires to permit the vise to move longitudinally until the stop engages the abutment so that the last saidreengagerr'ent of the wires is at a position closely adjacent the ends thereof, the said mechanism being operable when position,

means operable after reengsgement of the wires (ill 4 the stop is in its said spacer engaging by both devices for rotating the chuck to eflect twisting of the end portions of the wires, and means rendering the spacer withdrawing mechanism imperative upon actuation of the second said operating means after the stop has been moved outward to a position beyond its said spacer engaging position.

10. In a brush making machine, the combination of two devices for gripping brush wires at positions spaced from the ends thereof one of which devices is a nonrotatable vise biased for longitudinal outward movement and the other of which devices is a rotatable chuck serving upon rotation to effect primary twisting of the wires between the said positions of engagement, a stop longitudinally movable with the vise, a stationary abutment engageable by the stop, a spacer initially interposed between the abutment and the stop, an arm connected with the spacer for moving it, operating means for causing the chuck to release and reengage the wires, the vise upon release of the wires by the chuck moving longitudinally until the stop engages the spacer so that reengagement of the wires by the chuck is at a position closely adjacent the ends thereof, a lever bodily movable with the vise for causing it to release and reengage the wires, a longitudinal flange carried by the lever for engaging the arm to withdraw the spacer from its interposed position substantially simultaneously with the release of the wires by the vise to enable the said vise to move longitudinally until the stop engages the abutment so that reengagement oi the wires by the vise is at a position closely adjacent the ends thereof, the said flange being in position to engage the arm when the stop is in its said spacer engaging position and the said flange being out of arm engaging position when the vise and the lever have been moved outward so that the stop is in a position beyond its said spacer engaging position, and means operable after reengagement oi the wires by both devices for rotating the chuck to effect twisting of the end portions of the wires.

11. In a brush making machine, the combination of two devices initially positioned for releasably gripping brush wires at positions spaced from the ends thereof one of which devices is bodily movable longitudinally, means biasing the bodily movable gripping device outward away from the other gripping device, means for effecting relative rotation between the gripping devices to cause primary twisting of the wires between the said positions of initial engagement, the twisting action causing the bodily movable gripping device to move inward in opposition to the biasing means, means for releasing one gripping device from the wires and for reengaging it therewith, means for limiting outward movement of the bodily movable gripping device at a predetermined position when the wires are released by the last aforesaid gri ping device so that the said device reengages the wires near the corresponding ends thereof. means for releasing the second gripping device from the wires and for reengaging it therewith, means for limiting additional outward movement of the bodily movable gripping device at a second predetermined position when the wires are released by the second aforesaid gripping device so that the said gripping device reengages the wires near the corresponding opposite ends thereof, the two said movement limiting means relatively positioning the gripping de- LNG vices and the wires for dual twisting of the wires at the end portions thereof when relative rotation is again effected between the gripping devices which nnal twisting again causes the bodily movable gripping device to move inward in opposition to the biasing means, and means for limiting outward movement of the bodily movable gripping device at a third predetermined position upon the release of either gripping device from the wires after final twisting.

12. In a brush making machine, the combination of two devices for gripping brush wires at positions, spaced from the ends thereof one of which devices is a nonrotatabie vise biased for longitudinal outward movement and the other of which devices is a. rotatable chuck serving upon rotation to effect primary twisting of the wires between the said positions of engagement, operating means for causing one of the wire gripping devices to release and reengage the wires, means operable upon such release for stopping longitudinal movement of the vise at a predetermined position so that reengagement of the wires is at a position closely adjacent the ends thereof, operating means for causing the other wire gripping device to release and reengage the wires, means operable upon the last said release for stopping longitudinal movment of the vise at a second predetermined position so that the last said reengagement of the wires is at a position closely adjacent the ends thereof, means operable after reengagement of the wires by both devices for rotating the chuck to effect twisting of the end portions of the wires with resultant inward movement of the vise due to shortening of the effective length of the wires, and means for stopping movement of the vise at a third predetermined position upon release of the wires after the last said twisting.

13. In a brush making machine, the combina-- tion of two devices for gripping brush wires at positions spaced from the ends thereof one of which devices is a nonrotatable vise biased for longitudinal outward movement and the other of which devices is a rotatable chuck serving upon rotation to effect primary twisting of the wires between the said positions of engagement, a stop longitudinally movable with the vise, a stationary abutment engageable by the stop, a spacer having a wide position and having a narrow portion adjacent the abutment, the spacer being initially positioned with the wide portion thereof interposed between the abutment and the stop, operating means for causing one of the wire gripping devices to release and reengage the wires, the vise upon release of the wires moving longitudinally until the stop engages the wide portion of the spacer so that reengagement of the wires is at a position closely adjacent the ends thereof, means for fully withdrawing the spacer after the said release and reengagement so that neither portion thereof is interposed between the stop and the abutment, operating means for causing the other wire gripping device to release and reengage the wires, the vise upon the last said release of the wires moving longitudinally until the stop engages the abutment so that the last said reengagement of the wires is at a position closely adjacent the ends thereof, and means operable after reengagement of the wires by both devices for rotating the chuck to effect twisting of the end portions of the wires, the vise and stop being moved longitudinally inward during such twisting so that the spacer may be moved to an intermediate posi- 16 tion with only the narrow portion thereof interposed between the stop and the abutment.

14. A machine as set forth in claim 13, wherein the spacer is biased toward its interposed position so that upon release thereof after it has been fully withdrawn the narrow portion thereof engages the side of the stop and so that after the said inward movement of the vise and the stop the wide portion of the spacer engages the side of the stop with the narrow portion thereof interposed between the stop and the abutment.

15. A machine as set forth in claim 13, wherein means is provided for biasing the spacer toward its interposed position, and wherein mechanism is provided enabling the second said operating means to act substantially simultaneously with the release of the wires to fully withdraw the spacer, the said mechanism upon reengagement of the wires permitting the spacer to be moved by its biasing means until the narrow portion thereof engages the side of the stop so that upon subsequent inward movement of the vise and stop the spacer is moved by its biasing means to a position wherein the main rear face thereof engages the side of the stop and wherein the said narrow portion thereof is interposed between the stop and the abutment.

16. In a brush making machine, the combination of two devices for gripping brush wires at positions spaced from the ends thereof one of which devices is a nonrctatable vise biased for longitudinal outward movement and the other of which devices is a rotatable chuck serving upon rotation to effect primary twisting of th wires between the said positions of engagement, a stop longitudinally movable with the vise, a stationary abutment engageable by the stop, a movable spacer having a wide portion and having a narrow portion adjacent the abutment, the spacer being initially positioned with the wide portion thereof interposed between the abutment and the stop, means for biasing the spacer toward its interposed position, operating means for causing one of the wir gripping devices to release and reengage the wires, the vise upon release of the wires moving longitudinally until the stop engages the wide portion of the spacer so that reengagement of the wires is at a position closely adjacent the ends thereof, operating means for causing the other wire gripping device to release and reengage the wires, mechanism enabling the last said operating means to not substantially simultaneously with the last said release of the wires to fully withdraw the spacer so that neither portion thereof is interposed between the stop and the abutment to thus permit the vis to move longitudinally until the stop engages the abutment with the result that the last said reengagement of the wires is at a position closely adjacent the ends thereof, said mechanism being operable when the stop is in its position of engagement with the wide portion of the spacer and the said mechanism releasing the spacer for movement by its biasing means upon reengagement of th wires by the last said gripping device, means operable after reengagement of the wires by both devices for rotating the chuck to enect twisting of the end portions of the wires, the vise and stop being moved longitudinally inward during such twisting so that the spacer may be moved by its biasing means to an intermediate position wherein only the narrow portion thereof is interposed between the stop and the abutment with the result that the stop engages the narrower portion of the spacer upon release of the wires after the last said 1 7 twisting, and means rendering the spacer withdrawing mechanism inoperable when the stop is in its position of engagement with the narrow portion of the spacer.

1'1. In a brush making machine, the combination of a main slide movable rearward and forward, the combination of two devices on the main slide for gripping brush wires at positions spaced from the ends thereof one of which devices is a nonrotatable vise biased for longitudinal outward movement and the other oi which devices is a rotatable chuck serving upon rotation to effect primary twisting of the wires between the said positions of engagement, operating means for causing the wire gripping devices to release and reengage the wires, the vise upon release of the wires moving longitudinally so that the wires are reengaged closely adJacent the ends thereof with the result that upon further rotation of the chuck the end portions of the wires are twisted, and means dependent on the rearward movement of the main slide for moving the vise longitudinally inward from its extreme outward position.

18. A machine as set forth in claim 17, wherein means is provided for retaining the vise in the position to which it is moved by the said vise moving means.

19. A machine as set forth in claim 17, wherein the vise moving means comprises a stat on ry cam and a cam engaging element connected with the vise.

20. In a brush making machine, the combination of a main slide movable rearward and forward, the combination of two devices on the main slide for gripping brush wires at positions spaced from the ends thereof one of which devices is a nonrotatable vise biased for lon itudinal outward movement and the other of which devices is a rotatable chuck serving upon rotation to effect primary twisting of the wires between the said positions of engagement, operating means for causing one of the wire gripping devices to release and reengage the wires, means operable upon such release for stopping longitudinal movement of the vise at a predetermined position so that reengagement of the wires is at a position closely adjacent the ends thereof, operating means for causing the other wire gripping device to release and reengage the wires, means operable upon the last said release for stopping longitudinal movement of the vise at a second predetermined position so that the last said reengagement ofthe wires is at a position closely adjacent the ends thereof, means operable after reengagement of the wires by both devices for rotating the chuck to effect twisting of the end portions of the wires with resultant inward movement of the vise due to shortening of the effective length of the wires, means for stopping movement of the vise at a third predetermined position upon release of the wires after the last said twisting, and means dependent on the rearward movement of the main slide for moving the vise longitudinally inward to the said third predetermined position in the event that it is not so moved as the result of the final twisting of the wires.

21. In a brush making machine, the combination of a main slide movable rearward and for ward, the combination of two devices on the main slide for gripping brush wires at positions spaced from the ends thereof one of which devices is a nonrotatable vise biased for longitudinal outward movement and the other of which devices is a rotatable chuck servlng upon rotation to effect primary twisting of the wires between the said 18 positions of engagement, a stop longitudinally movable with the vise, a stationary abutment engageable by the stop, a spacer having a wide position and having a narrow portion adjacent the abutment, the spacer being initially positioned with the wide portion thereof interposed between the abutment and the stop, means for biasing the spacer toward its interposed position, operating means for causing one of the wire gripping devices to release and reengage the wires, the vise upon release of the wires moving longitudinally until the stop engages the wide portion of the spacer so that reengagement of the wires is at a position closely adjacent the ends thereof, means for fully withdrawing the spacer after the said release and reengagement so that neither portion thereof is interposed between the stop and the abutment, operating means for causing the other wire gripping device to release and reengage the wires, the vise upon the last said release of the wires moving longitudinally until the stop engages the abutment so that the last said reengagement of the wires is at a position closely adjacent the ends thereof, means operable after reengagement of the wires by both devices for rotating the chuck to eflect twisting of the end portions of the wires,

and means dependent on the rearward movement of the main slide for moving the vise and stop longitudinally inward to an extent sumcient to permit the spacer to be moved by its biasing means to an intermediate position with only the narrow portion thereof interposed between the stop and the abutment.

22. In a brush making machine, the combination of two devices initially positioned for releasably gripping brush wires at positions spaced from the ends thereof one of which devices is bodily movable longitudinally, means biasing the bodily movable gripping device outward away from the other gripping device, means for effecting relative rotation between the gripping devices to cause primary twisting of the wires between the said initial positions of engagement, the primary twisting action causing the bodily movable gripping device to move inward in opposition to the biasing means, means dependent upon the said inward movement of the bodily movable gripping device for stopping the relative rotation between the gripping devices, means for releasing one gripping device from the wires and for reengaging it therewith, means for limiting outward movement ofathe bodily movable gripping device at a predetermined position when the wires are released by the last aforesaid gripping device so that the said device reengages the wires near the corresponding ends thereof, means for releasing the second gripping device from the wires and for reengaging it therewith, means for limiting additional outward movement of the bodily movable gripping device at a second predetermined position when the wires are released by the second aforesaid gripping device so that the said gripping device reengages the wires near the corresponding opposite ends thereof, the two said movement limiting means relatively positioning the gripping devices and the wires for final twisting of the wires at the end portions thereof when relative'rotation is again effected between the gripping devices which final twisting again causes the bodily movable gripping device to move inward in opposition to the biasing means, and means dependent upon the last said inward movement of the bodily movable gripping device for stopping the relative rotation between the griping devices.

ascacae 28. In a brush making machine, the combination of two devices initially positioned for releasably gripping brush wires at po i n sp ed f m the ends thereoi one of which devices is bodily movable longitudinally, means biasing the bodily movable gripping device outward away from the other gripping device, means for eflecting relative rotation between the gripping devices to cause primary twisting of the wires between the said initial positions of engagement. the primary twisting action causing the bodily movable gripping device to move inward in opposition to the biasing means. means for stopping relative rotation between the gripping devices, means, including a member movable in unison with the bodily movable gripping device for actuating the said stopping means after a predetermined movement of the said gripping device during primary twisting, means for releasing the gripping devices from the wires and for reengaging them therewith, means for limiting outward movement of the bodily movable gripping device at a predetermined position when the wires are released and reengaged, the gripping devices then engaging the wires near the ends thereof for final twisting when relative rotation of the gripping devices is again effected and the final twisting action causing the bodily movable gripping device to again move inward in opposition to the biasing means. and a spacer movable to a position between the actuating member and the rotation stopping means, the said spacer enabling the actuating member to actuate the stopping means after a predetermined movement of the bodily movable gripping means during final twisting.

24. In a brush making machine, the combination of two devices for pping brush wires at positions spaced from the ends thereof one of which devices is a nonrotatable vise biased for longitudinal outward movement and the other of which devices is a rotatable chuck serving upon rotation to effect primary twisting of the wires between the said positions of engagement, operating means for causing one of the wire gripping devices to release and reengage the wires, means operable upon such release for stopping longitudinal movement of the vise at a predetermined position so that reengagement oi. the wires is at a position closely adjacent the ends thereof, operating means for causing the other wire gripping device to release and rcengage the wires. means operable upon the last said release for stopping longitudinal movement of the vise at a secondpredetermined position so that the last said reengagement of the wires is at a position closely adjacent the ends thereof, means operable after the first engagement of the wire gripping devices with the wires to rotate the chuck to effect primary twisting and operable after the aforesaid reengagement of the wires by both devices for rotating the chuck to effect twisting of the end portions of the wires, a longitudinal rod movable with the vise, means engageable by the rod for stopping the chuck rotating means upon movem nt of the vise and rod to a predetermined position during primary twisting, and a longitudinally movable pin adapted to be interposed between the rod and the chuck stopping means during twisting of the ends of the wires to enable the rod to operate the said chuck stopping means upon movement of the vise and rod to a second predetermined position.

25. A machine as set forth in claim 24, wherein the pin is carried by and longitudinally movable relatively to a pivoted arm, the am being movable to locate the pin in its interposed position or to remove it therefrom.

26. A machine as set forth in claim 24, wherein the pin compris.s a longitudinal main body and a longitudinal screw adjustable with respect to the main body to change the effective length of the pin.

27. In a brush making machine, the combination of two devices for gripping brush wires at positions spaced from the ends th,reof one of which devices is a nonrotatable vise biased for longitudinal outward movement and the other of which devices is a rotatable chuck serving upon rotation to effect primary twisting of the wires between the said positions of engagement, a stop longitudinally movable with the vise, a stationary abutment engageable by the stop, a spacer initially interposed between the abutment and the stop, an arm connected with the spacer for moving it, operating means for causing one of the wire gripping devices to release and reengage the wires, the vise upon release of the wires moving longitudinally until the stop engages the spacer so that r-engagement of the wires is at a position closely adjacent the ends thereof, operating means for causing the other wire gripping device to release and reengage the wires, means enabling the last said operating means to withdraw the spacer from its interposed position substantially simultaneously with the last said release of the wires to enable the vise to move longitudinally until the stop engages the abutment so that the last said reengagement of the wires is at a position closely adjacent the endsthereof, means operable after the first engagement of the wire gripping devices with the wires to rotate the chuck to effect primary twisting and operable after the aforesaid reengagement of the wires by both devices for rotating the chuck to eflect twisting of the end portions of the wires, mechanism automatically operable upon the longitudinal inward movement of the vise to a predetermined position during primary twisting for stopping the chuck rotating means, means automatically operable upon the longitudinal inward movement of the vise to a second predetermined position during twisting of the ends of the wires for operating the said chuck stopping mechanism, and mechanism for causing the last said means to be operative when the spacer is in its withdrawn position and inoperative when the spacer is in its interposed position.

28. In a brush making machine, the combination of two devices for gripping brush wires at positions spaced from the ends thereof one of which devices is a nonrotatable vise biased for longitudinal outward movement and the other of which devices is a rotatable chuck serving upon rotation to effect primary twisting of the wires between the said positions of engagement. a stop longitudinally movable with the vise, a stationary abutment engageable by the stop, a spacer initially interposed between the abutment and thestop. an arm connected with the spacer for moving it, operating means for causing one of the wire gripping devices to release and reengage the wires. the vise upon release of the wires moving longitudinally until the stop engages the spacer so that reengagement of the wires is at a position closely adjacent the ends thereof, operating means for causing the other wire fl pping device to release and reengage the wires, means enabling the last said operating means to withdraw the spacer from its interposed 21 position substantially simultaneously with the last said release of the wires to enable the vise to move longitudinally until the stop engages the abutment so that the last said reengagement of the wires is at a position closely adjacent the ends thereof, means operable after the first engagement of the wire gripping devices with the wires to rotate the chuck to eflect primary twisting and operable after the aforesaid management of the wires by both devices for rotating the chuck to effect twisting of the end portions of the wires. a longitudinal rod movable with the vise, means engageable by the rod for stopping the chuck rotating means upon movement of the vise and rod to a predetermined position during primary twisting, a longitudinally movable pin adapted to be interposed between the rod and the chuck stopping means during twisting of the ends of the wires to enable the rod to operate the said chuck stopp means upon movement of the vise and rod to a second predetermined position, and mechanism operable by the spacer withdrawing means for moving the 20 Number said pin to its interposed position when the spacer is moved to its withdrawn position and for moving the said pin out of its interposed position when the spacer is moved to its interposed position.

29. A machine as set forth in claim 28, wherein the pin is resiliently supported so that it will yield when moved toward its interposed position with the rod in position to interfere with such movement.

ALFRED L. LE FEBVRE. MILTON H. STRONG. EARL J. GA'I'I'ING.

REFERENCES CITED The following references are of record in the tile of this patent:

UNITED STATES PATENTS Name Date Hertzberg Sept. 22, 1931 Lipps Nov. 22, 1932 Baumgartner Mar. 11, 1941

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