US2415083A - Brush making machine - Google Patents

Description

Feb. 4, 194-7. c RLsoN 2,415,083

BRUSH MAKING MACHINE Filed Nov. 16, 1942 4 Sheets- Sheet 1 INVENTOR. v

JZknf 62271507,

Feb. 4, 1947.

J. I. 'CARLS ON BRUSH MAKING MACHINE Filed Nov. 16, 1942 4 Sheets-Sheet 2 INVEIITOR; J5 hnfCarLaom Feb. 4, 1947. .1. l. CARLSON BRUSH MAKING MACHINE Filed Nov. 16, 1942 4 Sheets-Sheet 3 a. W U M :PJ. M u M I J: i

Feb. 4, 1947. ARLSON 2,415,083

BRUSH MAKING MACHINE Filed Nov. 16, 1942 4 Sheets-Sheet 4 ghn/ffarlaom Low/ W- I 27%;?

patented Feb. 4, 1947 BRUSH MAKING MACHINE John I. Carlson, Aurora, 111., assignor to Carlson Tool & Machine 00., Aurora, 111., a partnership composed of John I. Carlson and Clifiord D.

Carlson Application November 16, 1942, Serial No. 465,705

19 Claims.

1 The invention relates to a brush making machine and it is the general object of this invention to provide a new and improved machine of the character described.

It is a more particular object of the invention to provide a new and improved, continuously operating brush making machine.

Another object is to provide in a brush making machine means for rendering the machine continuously operable while employing table aotuating cams of reasonable size.

Another object is to provide a brush making machine having a pair of brush back holders at each operating means, means for coordinate- 1y actuating theholders and the operating means repeatedly to perform a given operation until the entire brush back in one holder has been operated upon, and means thereafter automatically presenting the other brush back to the operating means to be similarly operated upon.

Yet another object is to provide a brush making machine having a drilling device and a tufting device, a pair of brush back holders at each device, means for actuating the devices and intermittently shifting the holders in timed re1ationship until the devices have acted upon the entire brush back in one of each pair of holders, and means for thereafter withdrawing the one and presenting the other of each pair of holders, such movement of the holders taking place in moderate steps to avoid shock and stress.

Yet another object is to provide a brush making machine having a drilling device and a tufting device, a pair of brush back holders at each device, means for actuating the devices and intermittently shifting the holders in timed relationship until the devices have acted upon the entire brush back in one of each pair of holders, and means for temporarily arresting operation of said devices while the holder shifting means continues through a step-by-step movement to withdraw the one and present the other of each pair of holders to the devices.

A further object is to provide in a continuously operating brush making machine new and improved means for actuating the stock or tuft guard.

A further object is to provide in a brush making machine, a reciprocable tuft guard having a neutral or normal position occupied during the tuft inserting operation, and means for reciprocating the guard on either side of its neutral position including means readily adjust- 2 able to cause reciprocation on one side or the other.

Yet a further object is to provide a brush making machine having a tufting mechanism, a pair of brush back holders, means succes sively presenting the back in first one and then the other of said pair of holders to the tufting mechanism, tuft guard means, and means causing the tuft guard means to reciprocate on one side of a neutral position while the back in one holder is being acted upon and to reciprocate on the other side of a neutral position while the back in the other holder is being acted upon.

Other objects and advantages will become apparent from the following detailed description taken in connection with the accompanying drawings, in which: i

Fig. 1 is a rear elevational view of the upper portion of a brush making machine embodying the features of this invention.

Fig. 2 is an enlarged transverse sectional view taken approximately along the line 22 of Fig. 1 and showing only the clutch control mechanism.

Fig. 3 is a fragmentary elevational view taken as looking from the right in Fig. 2.

Fig. 4 is 'a transverse sectional view taken approximately along the lined- 1 of Fig. 1.

Fig. 5 is a transverse sectional view taken approximately along the line 5-5 of Fig. 1.

Fig. 6 is a diagrammatic showing of the cam in Fig. 4. and the relationship of the tripper fingers.

Fig. 7 is a diagrammatic showing of a pair of brush back holders having drilled brush backs therein. 1

Fig. 8 is an end elevational View taken from the right in Fig, 1 and showing, somewhat enlarged, only the tuft guard actuating mechanism.

Fig. 9 is a plan view of the mechanism shown in Fig. 8.

Fig. 10 is a fragmentary detail View taken along the line Ill-l0 of Fig. 9.

The brush making machine herein shown, particularly in Fig. 1, for purposes of disclosure is, as to basic construction and principles of operation, of the general type of brush making machine well known in the art. Typical of such a machine is that shown in the patent to Fisher No, 1,512,588, dated October 21, 1924. Such a machine comprises generally a base or bed having means for movably supporting a pair of brush backs, means for drilling holes in one of thebrush backs, means for tufting and stapling 3 the other of the brush backs, means for intermittently advancing the brush backs, and means for actuating the drilling, tufting and stapling means in proper timed relationship with the step-by-step advance of the backs.

The machine herein disclosed has a base or bed [(9, partially shown, and upstanding from either end of the bed It are uprights H and 12 connected at their tops by a cross member 13. Intermediate its ends, the bed I supports just above it and for vertical movement, in ways not clearly shown, an elongated bridge l4 extending longitudinally of the bed. This bridge in turn supports a table [5 which is mounted for movement longitudinally of the bed on ways it (see Fig. 5); the ways It being further supported on a plurality of slides H on ways 18 extending transversely of the bed. The table l5 thus may be moved vertically, longitudinally or transversely of the machine.

Mounted on the cross member [3 are two drill heads 28 of identical construction. Also mounted on the cross member 13 are two complete tufting and stapling units or devices generally designated 2|, each having its picker bar arm 22, its wire carrier 23, and its tuft inserting, staple driving and other mechanism not clearly visible in the rear View of the machine shown in Fig. 1. Disposed immediately beneath the units 2! is a shelf 24 bearing structures such as a picker bar 22', a wire cutter 23', and others cooperating with the mechanisms above mentioned in the tufting and stapling operations. Reciprocable underneath the shelf 24 is a tuft guard mechanism 25. Save for the tuft guard mechanism, neither the drilling nor the tufting and stapling mechanisms form any part of this invention, and the above general identification coupled with such general operation as will hereinafter be described are believed sufficient for purposes of this disclosure. It is also pointed out that the showing of two drill heads 20 and two units 2| is in no way material to this invention.

Rotatable and also vertically reciprocable in each drill head 20 is a drill spindle 26 constantly rotated by a motor (not shown) and periodically reciprocated. The reciprocatory movements are imparted to the drill spindle by a cam 27, fast on a cam shaft 28, through suitable lever and link mechanism including a rock shaft 29 journaled in bearings 30 bolted to the top of the cross member l3. Shaft 28 extends parallel with the cross member 13 on one side thereof and is journaled in bearings 3H secured to the side of the cross member. Also fast on this shaft is an eccentric 32 operating through suitable, well known means, including a rock shaft 33, the picker bar arm 22 and associated mechanism. At its right hand end, as viewed in Fig. 1, shaft 28 terminates in an eccentrically positioned pin 34 operating through a link 35, an arm 36 rigid with a rock shaft 31, an arm 38 rigid with the rock shaft 31, and a link 39 to impart reciprocatory or oscillatory movement to certain parts of the unit 21, particularly the tuft inserting and stapling mechanism.

Extending parallel with the shaft 28 is a second, shorter cam shaft 40. This shaft is located beneath the cross member l3 and is journaled at one end in the upright 12 and at the other end in a bearing 41 depending from the cross member l3. Intermediate its ends the shaft passes through and is journaled in plates 42. One such plate 42 constitutes a part of each unit 2| to form ways or a means of support for vari- 4 ous mechanisms. Each plate is disposed in a vertical plane transversely of the machine and extends upwardly above the cross member 13 to provide a .bearing 43 for the rock shaft 31'. Fixed on the shaft 40 to rotate therewith are eccentrics 45 for actuating the wire carriers 23 and eccentries 46 for actuating the wire cutters 23. At its extreme right hand end, as viewed in Fig. 1, outwardly of the upright l2, the shaft 40 carries a disk wheel 4! that will hereinafter be referred to as the tumbler wheel. This second cam shaft 40 is driven in timed relationship with the cam shaft 23 from the shaft 28 through gearing R8.

The cam shafts 28 and ii] are adapted to be driven by an electric motor 50 mounted in the base of the machine. The drive train from the motor to the shafts includes a small pulley 51 on the motor shaft, a large pulley 52 on one end of a stub shaft 53, belts 54 running over the pulleys, a small pulley 55 on the other end of the stub shaft, a large pulley 56 on a drive shaft 57, and belts 58 running over the pulleys 55 and 56. Drive shaft 5'1 is short and journaled in a single bearing 59 secured to the side of the cross member l3 in line with the bearings 3|. Stub shaft 53 is journaled in a single bracket bearing 53 bolted to the upright l I.

In order that the cam shafts 2S and 49 may be rotated or not, even though the motor 50 continues to run, the cam shaft 28 is coupled to the drive shaft 5'! through medium of a clutch 60. This clutch is of the jaw type and has a driving element 6i rigid with the drive shaft 51, as best seen in Fig. 3, and a driven element 62 formed as a sleeve surrounding the end of the cam shaft 28 and secured thereto by a plurality of keys 64 so as to be slidable longitudinally thereof while held against rotation relative thereto. A compression spring 65 interposed between the sleeve and a collar 66 on the shaft 28 constantly urges the driven element of the clutch toward engaged position. Each of the driving and the driven elements has but a single tooth or jaw 53 and 6'1, respectively, so that the elements may engage in but one position and thus insure engagement of the clutch only at whole multiples of a revolution after disengagement. Stated another way, the jaws when engaged will always cause the shafts 51 and 28 to have the same angular relationship. The importance of this construction will become more apparent as the description proceeds.

The clutch 6i} and throw-out mechanism therefor, about to be described, are more particularly disclosed and claimed in my copending application Serial No. 379,808, filed February 20, 1941. The throw-out mechanism will therefore be but briefly described. Formed in the sleeve 62 (Figs. 2 and 3) to constitute a part of the irow-out mechanism is a peripheral cam groove 1'9 with one side wall H which is straight, while the opposite side wall has a straight and parallel portion l2 extending over approximately 180 degrees and two portions l3 each extending over approximately degrees and flaring outwardly in opposite directions so as to form a widened portion of varying width in the cam groove 10.

Adapted to cooperate with the cam groove 10 is a pin (5 which is slidably supported in a bore T6 formed in a bracket fl bolted to the cross member 13. The pin 15 has two positions, namely, a withdrawn position shown in Fig. 2, in which it is out of engagement with the sleeve 62, and a projected position in which it engages in the cam groove 10. The pin 15 is so positioned longitudinally of the shaft 28 that whenitis in engagement with the narrow portion of the cam groove Hi the clutch will be disengaged while,

when the clutch is engaged, the pin may enter the widened portion of the cam groove. It will be readily understood that as the clutch continues to rotate after the pin has been projected into the wide portion of the cam groove, one of the inclined portions is, depending upon the direction of rotation of the sleeve 62, will engage the pin i5 and thus gradually disengage the clutch as the inclined portion progressively cams the sleeve 62 to the right, as viewed in Fig. 3. Inasmuch as th angle of the inclined portions it with respect to the transverse plane through the cam groove is small, disengagement of the clutch is effected with little shock to the pin E5. The sleeve 62, being the driven element of the clutch, will, upon being disengaged from the driving element 6!, come to rest while the pin it is in the narrow portion of the cam groove, and thus will be retained in disengaged position until the pin is withdrawn. To insure the shaft 28 and the sleeve 52 coming to a rapid stop once the clutch is disengaged, the sleeve 62 carries a brake disk 18, and, upon disengagement of the clutch, contracts frictional brake shoes it supported by the cross member l3.

The pin '55 is adapted for both manual and automatic control, and the means for effecting such control includes an L shaped lever 39 which is pivoted at 8! to a bracket 82 secured to the bracket H and depending therefrom. The lever 38, as stated, is L-shaped having a generally vertically disposed arm 83 with its free end suitably connected to the pin it in a manner to be able to actuate the same in either direction, and a, generally horizontal arm 85 projecting forwardly f the machine for manual operation by the attendant running the machine. The lever 88 is normally urged in a direction to cause extension or projection of the pin 15 by a tension spring 85 connected at one end to the arm 81% and at the other end to the cross member it. To retain the pin i in its withdrawn position, the same is formed with a groove 85 adapted to be engaged by a locking plunger 81 reciprocable in a bore 88 disposed at right angles to the bore E6. The locking plunger 8? is constantly urged toward engagement with the pin and to that end carries at its lower end a cross piece 89, one end of whichhas connected thereto a light tension spring 98 having its other end connected to the bracket H. The opposite end of the cross piece has a rod 9! connected thereto. This rod extends downwardly to connect with one end of a knockout lever 92 pivoted intermediate its ends in a bracket Q3. A generally similar lever 94 also pivoted intermediate its ends in the bracket 93 has a rod 95 connected to one end thereof, while the other end of the rod is connected to a swivel block 96 secured to the arm 84 of the lever 80. In order that any burrs that may be struck up. as a result of the action of the locking plunger 81 on the pin i5 will not become wedged between the pin and the bore N and thus impair the movement of the pin, the pin 15 is formed with a slightly reduced portion 91 intermediat the groove 85 and the main body of the pin.

Customarily in the brush making art, one brush back is being drilled and simultaneously a drilled back is being tufted. 'When those backs are completed, however, the machine is stopped and is unproductive while the tufted back is removed, the drillecl back removed and remounted for tufting, and a blank or undrilled back mounted for drilling. It is one of the features of this invention to perfect a continuously operable brush making machine and thus eliminate the unproductive, idle period of previous machines. To that end, the table l5 has mounted thereon at each operating station, that is, beneath each drill head 2!] and each unit H, a pair of brush back holders Hi8 and tell each independently operable to clamp a brush back. In addition, means is provided, operable immediately upon completion of the particular operation on the back in one of each of the pairs of holders, to present for operation the back in the other holder, this presentation of the back in the other holder being entirely automatic and without attention on the part of the attendant of the machine. The holders themselves may be of any well known construction and are therefore not described in detail. They should, of course, be placed as close together as practically possible, preferably in a side by side arrangement as shown in Figs. 1 and 7.

During the operation on a back the table l5, and hence the holders 1% and 1%, is given a step-by-step advance to present to the drill new portions of a blank brush back to be drilled and to present to this tufting unit a new hole of a drilled back to be tufted. Such advance may be composed simply of a lateral, a longitudinal, or a vertical movement of the table I 5, or the ad- Vance may be a combination of any two or more movements. Herein such movements are imparted to the table l5 by separat means having, however, a common element in the form of a cam shaft 10!. This shaft extends the full length of the machine in the base thereof and is journaleltl near its ends in the ends of the base iii. At intervals throughout its length, the shaft has rigid therewith four large wheels or spiders I82, I53, ltd and IE5. The shaft is given an intermittent step-by-step rotation in timed relation with the cyclical operation, i. e., with the reciprocation or other movements, of the elements composing the drills 2G and the tufting units 2|.

To that end, there is non-rotatably mounted on one end of the shaft 3, large gear I06 meshing with a smaller gear lll'i non-rotatably mounted near one end of a stub shaft Ida. At the same end, the shaft N38 has rigid therewith a brake drum surrounded by a brake band Hi9 constant- 1y lightly gripping the drum to hold the shaft 508 against too free rotation. At the end opposite the brake drum the shaft I08 has rigid therewith a ratchet wheel H0, while rotatable on the shaft intermediate the ratchet Wheel and a bearing ill for the shaft is a segmental element I I2 carrying a pawl l l 3 engaging the ratchet wheel Ho. The segmental element H2 is oscillated to impart an intermittent rotation to the ratchet wheel through the medium of a rod H4 connected at one end to the segmental element H2 and connected at the other end to a block H5 adjustable radially of the pulley 56 so as to vary the throw of the segmental element.

Wheel Hi2 carries a plurality of cam segments H6 (see Fig. 4) going to make up a comparatively large, circular cam H5 imparting and controlling the longitudinal movement of the table I5 through the medium of mechanism now to be described. Pivotally mounted on a vertically disposed pin Il'l located in the base of the machine (see Fig. l) is a crank H8 having a short arm HQ-and a substantially longer arm I26 disposed substantially at right angles to one another. To the free endof the ehort arm H9 is pivotally eonnected a rod I2I with its other end pivotally connected to a slide I22. This slide is bifurcated at one end and has interposed between the bifurcated portions a roller r cam follower I23 disposed to ride on the periphery of the cam H6. The longer arm I29 at its free end terminates in an enlarged, flattened portion I 24 formed with an arcuate slot I25. Adjustable in this arcuate slot and upstanding from the arm I through an arcuate slot I25 in the bed of the machine is a pin I25 adapted to bear, in all vertical and transverse positions of the table I5, against a transverse bar I27 carried. on the table I5 on arms i2l extending from the left end of the table (see Figs. 1 and 4). This bar I2! is caused at all times yieldably to bear against the pin I 26 and to cause the cam follower I23 to remain in contact with the periphery of the cam by means of tension springs I28 secured at one end to the table and at the other end to the bridge 14 to impart movement of the table I5 to the left, as viewed in Fig. 1.

Wheel I33, likewise, carries a plurality of cam segments I30 (see 5) going to mak up a comparatively large, circular cam I30 imparting and controlling the transverse movement of the table IE3 through mechanism now to be described. This mechanism comprises simply a lever i3I pivoted at it lower end on the machine frame and being formed at its upper end with an elongated slot I32. Adjustable in this slot is a swivel I33 connected to one end of a rod I34 pivotally connected at its other end to a suitable means I35 on the table 55. Intermediate its ends, the lever I3I carries a cam follower I35 adapted to engage the periphery of the cam I39. Tension Spring means I31 is provided for urging the table in one direction transversely of the machine and for holding the cam follower I36 against the periphery of the cam I38.

Similarly, Wheel I04 is provided with cam segments forming a cam I38 serving to supply and govern the vertical movements of the table I5. Inasmuch, however, as this mechanism is generally similar to that described in connection with the cam I36, and inasmuch as this particular vertical movement plays no important part in this invention, the mechanism will not be described in detail.

While the spacing of the tufts in the different types of brushes varies, such spacing in all instances is comparatively small and hence requires but a slight movement of the table between each drilling and each tuiting operation. This slight and necessarily rapid movement, the speed of operation of the machine ranging from over 208 to 306 cycles per minute, is readily enough accomplished by the segmental cams without going to undue size. The movement of the table I5 required to withdrav. one holder and present another to the operating station, however, is so great as to present an entirely diiierent and difficult problem. To shift the table l5 this distance in the fraction of a cycle of the drilling or tufting units during which they are not in engagement with the backs would place an excessive strain on the machine, even if the operations were possible. Such shift would, however, require such sharp rises on segmental cams of conventional size that the cam followers would not follow the same. To make the rise more gradual would require an excessively large cam and one all out of proportion for the regular step-by-step movements of the table.

It is a feature of this invention, therefore,

first, to obviate the necessity of having this large movement of the table i5 take place in a fraction of one cycle, and, secondly, to permit the movement to be made in steps the same as during the tufting operation, to obviate the necessity of the excessively sharp rise on the cam. To that end, means is provided for automatically arresting operation of the drilling and tufting units with the completion. of the last operation on the brush hack in one holder and for automatically initiating operation when the back in the other holder is in position to be acted upon. This means comprises a collar E i! and a collar I42 adapted to be rigidly but adjustably clamped onto the segmental cam shaft Iti. Projecting in diametrically opposite directions from the collar I lI arefmgers M3 and M5, each of such length as to engage and pivot and then pass by the lever 92. Shaft Iili rotates in a clockwise direction, as viewed in Fig. 2, and thus fingers I43 and i 35 tilt lever 92 in a direction to withdraw plunger 8? releasing it to disengage clutch 61]. Similarly, collar It?! has n. rs i l- 3 and H56 projecting in diametrically posite directions therefrom, each of a length to engage and tilt lever El i. Tilting of this lever acts through rod 95 and lever ad to withdraw 75 from groove ii! and thereby permit reergagement of the clutch. Considered in the direction of rotation of the shaft Elli, ii gers M3 and M5 are in advance of the fing 5 UL; and Me an angular amount corresponding to the movement required to remove one holder and place the other in position to be operated upon. This distance will vary with different holders and with different brush backs operated upon.

Herein the same means is utilized to effect movement of the table it; during removal of one holder from and shift of the other holder to the operation station as is employed to effect movement during the performance of operations on the backs, namely, one or more of the segmental cams. Whet ier the one or more segmental cams operate simultaneously or independently to provide the table movement depends upon the position of the holders we and ice relative to the table. Thus, if the holders are positioned diagonally of the table, the longitudinal and transverse movement cams HS I38 must operate simultaneously, whereas, if the holders are straight with the table, the segmental cams are eiiective at different times 2. .1.... alternately. For simplicity and a more ready understanding of the invention, the holders I 9?] and ME) are here shown squarely transverse of the table I5. Thus movement of the table i5 for the purpose of withdrawing one holder and presenting the other to the operating station will be effected entirely by the longitudinal movement segmental cam ii-t".

Referring now particularly to the diagrammatic showing the earn 555' in Fig. 6, the periphery of the cam is shown divided into four sections. Of these, section E58 represents that portion of the cam 55%,? utilized to impart the longitudinal movement to the table 55 necessary for the completion of the operation on the brush hack in one of the holders, herein holder Hit, while section {iii represents a corresponding portion of the cam required to impart the longitudinal movements to the table it: necessary for completion of the operation on the brush back in the other (liii of the holders. The actual contour of these sections will, of course, vary with the different brushes to be made, dependingupon the number of rows of tufts, the spacing thereof, and so forth, and will also vary depending upon whether the operations are performed in a direction transversely of the brush back or longitudinally thereof. Between the sections I59 and IE! or sections I52 and E53, representing the portions of the cam periphery required to impart the longitudinal movement to the table I required to withdraw one holder from and present the other holder to the operating station, and may be referred to as stepping-across sections. These sections too will vary depending upon the character of the brushes being made. These sections are given such contour as to effect such displacement of one holder with the other in the operating station in easy steps, and normally these steps are the same as those taken in advancing the table during operation on the backs, but may be varied to speed up somewhat this stepping-across process so long as the rises of the cam are kept gradual enough so that the follower I23 may follow the contour and not be injured.

The cam H6 and the collars MI and I42, of course, have a related angular relationship (see Fig. 6) and are so adjusted on the shaft Ilii that the fingers I43 and I45 will engage and trip the lever 92 to effect disengagement of the clutch 6!! respectively as the cam follower I23 reaches the juncture between the sections I55! and E52, and I5I and I53. Similarly, fingers Hi l and M53 will engage and trip the lever 94 to again re-engage the clutch 66 after the stepping-across operation has been performed and the cam follower I 23 reaches the juncture between the sections I52 and. I5I, and I53 and Ifit, respectively, assuming the cam I It to be rotating in a counter-clockwise direction, as viewed in Fig. 6.

It is, of course, essential that the advance of the holders always be retained in a certain timed relationship with respect to the cyclical operation, i. e. the. reciprocation of the drill spindles 26 and the operations of the various parts of the tufting units 2|. This timed relation is normally maintained because the shaft IflI is rotated step-by-step through the pawl and ratchet mechanism actuated from the pulley 56 which also drives the various cam shafts actuating the drill heads 23 and the units 2I. It is to prevent such timed relationship from being destroyed by the frequent engagement and re-engagement that here takes place that the clutch parts are formed with but a single jaw. With this construction, the clutch can engage in but a single position, and with the drill heads 20 and units 2| designed to complete a cycle Of operation with each rotation of the shaft 28 the same timed relationship between the drill heads and the units 2I and the segmental cam shaft ill! will always be maintained.

A brush making machine is usually equipped with a tuft guard, sometimes also called a turnbler. The function of such a tuft guard is to hold the tufts already inserted in the brush backout of the path of the mechanism as it is inserting and stapling the next tuft of bristles. In the because it provides a space into which the tufts ing mechanism may project should, for some reason or other, the guard not be in proper position and thus precludes injury to the tufting mechanism. Except for the strap I5? which, as already stated, is located only at the top of the jaw-like members, the channel or space formed between the two laterally spaced members IE6 is left completely open save for wire semi-loops or rings I58 hung across the channel openings near the bottom of the tuft guards. These wire rings or loops are loosely hung so as to be readily pivoted and serve to block entry of an already inserted tuft into the space between the members I56, but to pivot upwardly and permit the longitudinal withdrawal of the tumbler from around the tuft which had just been inserted.

As well known and as indicated above, the tuft guard I55 is reciprocated parallel to the face of the brush back, and to that end the two guards I55 here shown are mounted on a single carriage I59 consisting simply of an elongated member Hill and two tubular enlargements or sleeves It! extending transversely of the member I 66]. These sleeves are slidable on a pair of rods IE2 disposed beneath and supported by the shelf 2%. The rods I62 extend transversely of the shelf and of the machine.

In the continuously operating machine here disclosed and sometimes also in a non-continuous machine, it is necessary that the tuft guard approach the position that it assumes during the tufting operation from opposite directions. It is therefore another feature of this invention to provide a tuft guard mechanism having a neutral or normal position and mechanism for reciprocating the tuft guard so as to approach that neutral or normal position from opposite directions, the mechanism for reciprocating the guard being readily and automatically adjustable to cause approach from one or' the opposite direction. This mechanism includes a cross head, generally designated 65, non-rotatably secured on the end of a stub shaft I66 projecting through and journaled in a bearing 25' bolted to the shelf 25. Non-rotatably fixed on the other end of the shaft I66 is an arm I 6! extending generally downwardly (see Fig. 8) which has pivotally connected thereto through a swivel block I68 one end of a rod I69. The other end of this rod is pivotally connected again through a swivel block I'Iil to one end of a lever III pivoted intermediate its ends on a pin I72 carried on the underneath side of the shelf 24. As best seen in Fig. l, the lever Ill angles downwardly from the pin I12 to the end at which the rod IE9 is attached. At its other end, the lever I'll has pivotally connected'thereto a rod I13 pivotally connected to the carriage I59 midway between the sleeves IBI.

The cross head IE5 is rocked in timed relationship with the operation of the other mechanisms of the machine and to that end it is driven from the tumbler wheel l! which carries an eccentrically mounted pin I15. Connected to this pin is one end of a rod I16 slidable through a tubular arm I" on acrank I18. The other arm I19 of the crank is, by a pin I passing through the arm intermediate the ends thereof, pivotallyattached to a slide I8I carriedin ways i532 extend,- ing longitudinally of the cross head I65; At its free end and beyond the tubular arm I'll of the crank the rod I76 carries a collar I slidable thereon, and abutting this collar is one end of a compression spring I36, the other end of which abuts a similar collar I87. The latter collar I81 11 is adapted to be adjusted and held in adjusted position by a pair of nuts I88 threaded onto the free end of the rod I16.

It is believed apparent that as the wheel 41 rotates, and with the slide I8I in the position shown in Fig. 8, the collar I85 will strike the crank I18 and thereby rock the cross head I65 and the shaft I66, resulting in movement of the tuft guard carriage I59. This movement is, as will later become more apparent, a withdrawal of the carriage from its neutral or normal position. To return the carriage to its neutral or normal position and to center it properly over a drilled hole into which a tuft is to be inserted, the cross head I65 is on its upper edge formed with a pair of cam surfaces I99 and ISI, both sloping toward a central or meeting point 92. Adapted to ride on these cam surfaces is a follower I93 carried on the end of an arm I94 pivotally mounted intermediate its ends on a pin I95 projecting from the upright I2. The other end of the lever I94 has connected thereto one end of a tension spring I99, the other end of which is anchored to a stationary point on the brush making machine. The cross head IE is thus by the spring I95 and through the lever I94 constantly urged to a normal or neutral position, and hence to position the tuft guard carriage I59 in its neutral or normal position. The springs I86 and I96 are of such relative strength that the spring I89 will overcome the spring I99 as the rod I16 is moved upwardly periodically by the tumbler wheel 41. 7

With the slide I8l in the position shown in Fig. 8, engagement of the collar I85 with the crank I78 will, of course, rock the cross head in a counter-clockwise direction as viewed in Fig. 8. When, however, the slide I8I is shifted to the other end of the ways I82 in the cross head, similar contact of the collar I85 with the crank will rock the cross head in a clockwise direction, and hence move the tumbler carriage I59 in the opposite direction away from its neutral position, i. e. downwardly in Fig. 9. The follower I93 will now ride on the cam I9I and thus will still be effective to return the cross head and the tuft guard carriage to its neutral position as the collar I85 recedes.

Such shift of the slide I8l from one to the other side of the central point of the cross head I65 is here effected automatically through a cam, generally designated 299, composed of cam segments 2e: secured to the cam wheel I05. This cam controls the position of the slide I8I through mechanism including a rod 292 pivotally connected at one end to the free end of the arm I19 of the crank I13 and passing at the other end slidably through a collar 263. Surrounding the rod 202 and interposed between the collar 203 and a collar 294, tight on the end of the rod connected to the crank arm I19, is a compression spring 295. The stiffness of the spring 295 is such that under ordinary conditions it is capable of shifting and accurately positioning the slide I8 I, but may yield in the event that movement of the slide is for some reason or other blocked. A collar 203 is adjustably fixed on the rod 292 to be abutted by the collar 293 and shift the rod and the slide to the left. The collar 293 has pivotally connected thereto one end of an arm 296, the other end of which is fast on a shaft 29? journaled in a bearing 298 provided on the base It of the machine. Fast on the opposite end of the shaft 20'! is an arm 299 carrying a cam follower 2 I9 riding on the periphery of the cam 299. Preferably this arm is at its free end formed with a longitudinal slot 2H in which the follower is mounted so that it may be adjusted longitudinally of the arm. The follower is held in engagement with the cam 200 by means of a tension spring 2 i2 attached at one end to the arm 2516 and at the other end to a stationary portion of the machine.

The portion of the cam 299 depicted in Fig. 8 is shown as formed with a cam surface 2 I3 holding the slide I8I in the position shown in that figure and a cam surface 2H3 of smaller radius, which when engaged by the follower 2 II] will shift the slide to the left in Fig. 8 to a corresponding position in the opposite end of the ways I92. It is to be understood that the cam 239 will have such number of cam surfaces M3 and 2M as will be required to effect such reversals in the direction of approach of the tuft guards to their neutral position as is required by the particular manner in which the brush backs are operated upon. If, as herein assumed, the brush backs are drilled and filled in a transverse direction, the cam 209 will need to have but one surface 2 I 3 and one sur face 2 It for the direction of approach of the tuft guards will be reversed only when the table is shifted to present a different holder to the operating station. By way of example, should the brush backs in this machine be drilled and tufted longitudinally, then the direction of approach of the tuft guards would have to be reversed at the end of each longitudinal row and, correspondingly, the cam 299 would have to have a plurality of surfaces Bit and 2 I4.

To complete and facilitate an understanding of the invention, and particularly to correlate the operations of the various mechanisms described, the operation of the machine will be briefly set forth. Let it be assumed that the attendant has duly placed in the holders I30 and I99 underneath the drill heads 26 blank brush backs and that he has placed in the holders underneath the tufting units 2i properly drilled brush backs. Let it also be assumed, as heretofore, that the holders are strictly transverse of the table I5, that the brush backs are to have an even number (by way of example fourteen) of transverse rows of bristles, as shown in Fig. '7, and that the backs are to be drilled and the tufts inserted in a transverse operation, that is, in the manner or order indicated by the arrows in Fig. 7. Inasmuch as the holders rather than the drilling and tufting mechanisms are moved to present different points of the brush backs to the mechanisms for operation on the brush backs, the table movement will be directly opposite to that indicated by the arrows in Fig. 7. The attendant also will, of course, have attached the proper cam segments to the various cam wheels I02, I93, I94 and I95, and will have adjusted the collars I4! and I42 so as to have the proper angular relationship with respect to the cam Ht. Under the conditions here assumed, sections I59 and I-5I of the cam H8 would be undulating surfaces (see Fig. l) made up of seven portions 229 alternating with seven portions ZZI to move the holders transversely first in one direction and then back in the opposite direction. The cam I39 would have a stepped circumference (see Fig. 5) to shift the holders longitudinally at the completion of each transverse row of tufts. With these adjustments made and with the holders properl positioned so that the drills and the tufting mechanisms will act on the proper point of the brush backs, the attendant will now manually actuate the lever 89 to withdraw the pin '15 and permit 13 engagement of the clutch fill and thereafter the switch will be thrown to start the motor 50, initiating operation of the machine. Each of the units 2i will then operate to insert a tuft of bristles in the drilled hole A of the drilled brush back in the holder IEIB and simultaneously each of the drill spindles 25 will descend and drill a hole correspondingly located in the blank brush back in the holder i ii] beneath the drill head. After the drills and the tuft inserting means have been withdrawn from the backs, the shaft IEII will be rotated and in such rotation through cam I I6 and associated mechanism shift the table longitudinally one step to the right, as viewed in Figs. 1 and 7, to present hole B of the drilled brush back to the tufting mechanism and to present a corresponding point of the blank brush back to the drill 26. This operation continues until a tuft has been inserted in the hole C, whereupon the cam E38 is effective to shift the table i laterally so as to present a new transverse row of holes in the drilled brush back for tufting by the tufting mechanism. It is to be understood that during these operations and in proper timed relationship therewith the tuft guards I55 are appropriately reciprocated. Each guard I55 remains centered. over the hole in which the tuft is to be inserted while the tuft inserting and stapling means descends, and after the means has been withdrawn the collar I85 strikes tliecrank I'IS to rock the cross head I65 and withdraw the tuft guards I55. Prior to the following descent of the tufting mechanism the cross head IE5 is by the spring I95, the follower I53, and the cam surface I90, returned to its neutral position and hence effects return of the tuft guards to their neutral position. In; such return to neutral position, the tuft guards act in the manner of a shuttl bending to one side the tuft at the side of the hole in which the new tuft is to be inserted, and bending back the tuft occupying the adjacent hole considered in the longitudinal direction or row.

These operations continue with step-by-step advances of the table longitudinally, interspersed with alateral movement, until the last drilled hole is filled with a tuft and until the last hole is drilled in the blank brush back. With an even number of transverse rows and with the start made at the point A, the last hole or point operated upon is that re resented at D With the completion of the operation on this point or hole D, and during the next rotation of the shaft IIIII, the finger Hi3 engages and tilts the lever 92 to withdraw the locking plunger 8'! and thus free the pin 15 for projection by the spring 85 into the widened portion of the cam'groove Hi, with the result that the clutch during the next half revolution of the shaft 51 is disengaged and the operation of the drill heads and units 2 I arrested.

At this same time, cam follower I 23 will have reached the juncture between the sections I50 and I52 of the cam i I6.

While the drilling and tufting mechanisms are now idle, the shaft Iii! is continued to be rotated intermittently and the stepping-across section I52 of the cam M6 becomes effective to move the table l5 in such manner as to withdraw from the operating stations the holders I05 containing the completed brush and the newly drilled brush back, and position in the operating station the holders N10 to present new backs to be operated upon. This movement of the table, it will be appreciated from the previous description, is in steps or stages so that the rise in the cam surface need not be too sharp, nor that the movement of the table need not be so rapid as would injure the same. While this withdrawal of one holder and presentation of the other to the operating station is being effected, the cam 20!] is also being rotated and the cam follower 2H) duringthis interval passes from the surface M3 to the surface 2I4 with the result that the slide I8I is shifted from the position shown in Fig. 8 to the opposite end of the cross head I65. During subsequent operation, the tuft guard carriage I59 will now reciprocate on the opposite side of its neutral position to that in which it reciprocated while working on the brush back just completed. The necessity for this change in the direction of advance to and withdrawal from neutral position is readily apparent from Fig. 7, for the tufting operation will on the brush back in holder I00 proceed in a direction longitudinally of the back opposite to that of the first back.

As the follower I23 approaches the junction point between the section I 52 and the section I5 I, that is, when the holder I00 has been properly located in the operating station, the finger I44 will engage and trip the lever 94 which, in turn, through the crank 80, retracts the pin I5 to permit the clutch to re-engae'e and re-initiate operation of the drilling and tufting mechanisms. Because of the single toothed jaws, the clutch can engage in only one position and hence will assure that the drilling and tufting devices operate in the same timed relationship to the shaft Ilil as during the action on the first brush backs. The mechanism will now act to insert a tuft in the hole E and to drill a correspondingly located hole in the blank brush back beneath the drill heads 20. The operation will then proceed as described for the brush backs in the holders Iili! except that the order in which the holes are filled or drilled will be as indicated by the arrows in Fig. 7. During this period of operation, the follower I23 will, of course, ride on the section I5I of the cam IIB' which will be a duplicate of section I58 save that the entire table now has a mean position farther to the left, as viewed in Fig. 1, and thus correspondingly the mean. line of the cam surface encompassed in the section I5I will have a difierent radius from the mean line of the section I55. While the machine is thus operating on the backs and the holders I00, the attendant removes the finished brush and the drilled brush back from the holders Hill, and places the drilled brush backs in the holders I60 beneath the units 2i, and places in the holders I00 beneath the drill heads blank, undrilled backs. The machine is thus conditioned for uninterrupted operation.

By the time the last hole in the back in holder I00 has been filled, this hole here being represented by the letter F, the follower I23 will have reached the junction point between the sections I 5i and I53 on the cam IIIi', with the section I53 again taking over control of the table for the purpose of withdrawing the holders Iflfl and -re-presenting the holders iflfi. After the hole F has been filled and during the subsequent rotation of the shaft IllI, finger I45 now strikes and tilts the lever 92 to withdraw the locking plunger 81 and release the pin it? so that it may again disengage the clutch Bil. After appropriate stepby-step rotation of the shaft IBI with the drilling and tufting devices idle, as previously described, the finger M6 strikes and tilts the lever 94 to effect re-engagement of the clutch as previously described. During such shift of the table to re-present the holders lilil to the operating station, cam 268 has again, through its associated mechanism, returned the slide id! to the position shown in Fig. l, and the machine is now operatin the same as initially described.

It is believed apparent from the foregoing that I have perfected a brush making machine capable of continuous operation and thus of greater productivity, because of the elimination of the unproductive time heretofore lost while a finished back was being removed and a new back mounted in the holders. Inasmuch as this change involves four operations for each tufting r drilling device, cansiderable time was lost and substantially this entire time is gained, because in most instances the extent that the table must be moved to present a different work holder is such that it can be safely covered in a few seconds. I have, moreover, perfected such a continuously operating brush making machine in such manner that no undue strain is placed upon the operating parts during this presentation of a new holder and without the necessity of an excessively large cam. In fact, the cam is no larger than heretofore employed for conventional, interrupted operation machines. Moreover, I have, by the arrangement to effect discontinuance of the operation of the drilling and tufting mechanisms during this period of changeover, precluded possible injury to the mechanisms resulting from striking some portion of the holders.

Further, I have perfected an improved tuft guard and particularly a new and improved mechanism for reciprocating the guard and for adjusting the mechanism to produce the variation in movement of th guard. This makes possible a continuously operating machine and also makes possible a longitudinal filling and drilling of the brush backs with the resultant necessity of a change in the direction of approach of the tuft guard with the completion of each longitudinal row of tufts.

I claim as my invention:

1. In a brush making machine, a device for operating upon a brush back, a pair of brush back holders for presenting backs to said device, and mechanism operable to position one of said pair of holders so that a brush back therein is positioned to be operated upon by said device and shifting that holder step-by-step until the entire back has been operated upon, said mechanism including a lever system associated with the holders at one end and terminating at the other end in a cam follower, a cam having a first pair of opposed peripheral surfaces of equal length each engaged by the follower while one of the brush backs is being operated upon and a second pair of opposed peripheral surfaces separating the first pair and engaged by said follower and acting solely through said lever system to move one of said holders away from and the other of said holders into position to have a back therein operated upon by said device, and means for intermittently actuating said cam while said cam follower is in engagement with either of said second pair of surfaces to move one of said holders out of and the other of said holders into position by a step-by-step movement.

2. A brush making machine comprising, in combination, a device for repeatedly performing a particular operation upon a brush back, a pair of movable brush back holders each having an operative position beneath said device wherein a back may be operated upon by said device and a withdrawn position wherein a brush back may be loaded into and removed from the holder, mechanism operable to position one of said pair of holders in operative position and in that position shifting. that holder step-by-step until the entire back held therein has been operated upon and thereafter operable to withdraw said holder and to present to said device the other of said iolders for a similar operation on the back held therein, means for driving said device and said mechanism, and means operating in timed relation with said mechanism to arrest operation of said device while said mechanism withdraws one holder and presents the other holder to said device.

3. A brush making machine comprising, in combination, a device for repeatedly performing a particular operation upon a brush back, a pair of movable brush back holders each having an operative position beneath said device wherein a back may be operated upon by said device and a withdrawn position wherein a brush back may be loaded into and removed from the holder, mechanism operable to position one of said pair of holders inoperative position and in that position shifting that holder step-by-step until the entire back held therein has been operated upon and thereafter operable to withdraw said holder and to present to said device the other of said holders for a similar operation on the back held therein, a drive train for said device including a clutch, a drive train for said mechanism, and means operating in timed relation with said first mechanism disengaging said clutch while said r mechanism withdraws one holder and positions the other holder to be operated upon.

4. A brush making machine comprising, in combination, a device for repeatedly performing a particular operation upon a brush back, a pair of movable brush back holders each having an operative position beneath said device wherein a back may be operated upon by said device and a withdrawn position wherein a brush back may be loaded into and removed from the holder, mechanism operable to position one of said pair of holders in operative position and in that position shifting that holder step-by-step until the entire back held therein has been operated upon and thereafter operable to withdraw said holder and to present to said device the other of said holders for a similar operation on the back held therein, a drive train for said device including a clutch, a drive train for said mechanism, and means operating in timed relation with said first mechanism disengaging said clutch upon completion of the particular operation upon a back and causing re-engagement of said clutch when said mechanism places the other of said holders in position to have a back therein operated upon by said device.

5. A brush making machine comprising, in combination, a device for repeatedly performing a particular operation upon a brush back, a pair of movable brush back holders each having an operative position beneath said device wherein a back may be operated upon by said device and a withdrawn position wherein a brush back may be loaded into and removed from the holder, mechanism operable to position one of said pair of holders in operative position and in that position shifting that holder step-by-step until the entire back held therein has been operated upon, said mechanism including means thereafter coming into play for advancing both holders stepby-step until the one holder has been removed and the other positioned to have the blank therein operated upon, means driving said device and said holder advancing. means in timed relation, and means operating in timed relation with said holder advancing means to arrest operation of said device while the other holder is advanced to be operated upon.

6. A brush making machine comprising, in combination, a cyclical device for repeatedly performing a particular operation upon a brush back, a pair of movable brush back holders each having an operative position beneath said device wherein a back in the holder may be operated upon by said device and a Withdrawn position wherein a back may be loaded into and removed from the holder, mechanism operable to position one of said pair of holders in operative position and in that position shifting that holder step-by-step until the entire back held therein has been operated upon and thereafter operable to withdraw said holder and to present to said device the other of said holders for a similar operation on the back held therein, means for driving said device and said mechanism with said mechanism driven in timed relation to the cyclical operation of said device, and means operating in timed relationship with said mechanism to arrest operation of said device upon completion of the operation upon a back and to reinitiate operation of said device with the mechanism in the same timed relationship to the cycle of said device upon shift of said other holder to operative position.

'7. A brushmaking machine comprising, in combination, a cyclical device vfor repeatedly performing a particular operation upon a brush back, a pair of movable brush back holders each having an operative position beneath said device wherein a back in the holdermay be operated upon by said device and a withdrawn position wherein a back may be loaded into and removed from the holder, mechanism operable to position one of said pair of holders inoperative position and in that position shifting that holder stepby-step until the entire back held therein has been operated upon and thereafter operable to withdraw said holder and to present to said device the other of said holders for a similar operation on the back held therein, means fordriving said device including a single-jawed clutch making one revolution for each cycle of said device, means for driving said mechanism in timed relation with'the cyclical operation of saiddevice, and means operating in timed relationship with said mechanism to disengage said clutch upon completion of the operation upon a back and to re-engage said clutch upon shift of said other holder to operative position.

8. A brush making machine comprising, in combination, a cyclical device for repeatedly performing a particular operation upon a brush back, a pair of movable brush back holders each having an operative position beneath said device wherein a back in the holder may be operated upon by said device and a withdrawn position wherein a back may be loaded into and removed from the holder, mechanism including rotatable cam means operable to position one of said pair of holders in operative position and in that position shifting that holder step-by-step until the entire back held therein has been operated upon and thereafter operable to withdraw said holder and to present to said device the other of said holders for a similar operation on the back held therein, means for intermittently rotating said cam means in timed relation to the cyclical operation of said device, and tripper means rotated with said cam means and positioned to arrest operation of said device with the commencement of withdrawal of the one holder and to re-initiate operation of said device upon completion of the shift of the other holder into the operating station.

9. A brush making machine com rising, in combination, a cyclical device for repeatedly per forming a particular operation uponv a brush back, means for driving said device including a clutch engageable only in one position and making one revolution for each cycle of said device, control means for said clutch including a pair of trippable levers one for disengaging the clutch and the other for engaging the clutch, a pair of brush back holders each movable to an operating station beneath said device wherein a back in the holder may be operated upon by said device, and to a Withdrawn station wherein a back may be loaded into and removed from the holder, mechanism operable to position one of said pair of holders in the operating station and in that station shifting that holder in increments until the entire back held therein has been operated upon and thereafter operable to shift said last mentioned holder to its withdrawn station and to shift the other of said pair of holders to the operating station, said mechanism including a rotatable circular cam effective to produce the transverse component of holder movement and having a pair of cam surface sections effective during the movement of the holder in increments, and a pair of cam surface sections effective during withdrawal of the one holder and presentation of the other holder, means intermittently rotating said cam in timed relation to thecyclical operation of said device, and fingers rotatable with said cam tripping the one of said pair of trippable levers disengaging said clutch when one of said second pairof cam surface sections becomes efiective and to trip the one of said trippable levers for re-engaging said clutch when control passes from one of said second pair of cam surface sections to one of said first pair of cam surface sections.

10. In a brush making machine, a shiftable holder for a brush back, a tufting device, means for shifting said holder step-by-step to present new portions of the back to be tufted, tuft guard means, means, operating said tuft guard means in timed relationship with said tufting device, and means operating in timed relation with said holder shifting means adjusting said tuft guard operating means to alter the operation .of said tuft guard means.

11. In a brush making machine, a shiftable holder for a brush back, a tufting device for acting on a back held in said holder, means for shifting said holder step-by-step in timed relation to the operation of said tufting device to present new portions of the brush back to be tufted, tuft guard means mounted for reciprocatory movement parallel with said holder between a normal position assumed during insertion of a tuft by said tufting means and a withdrawn position, driving means for reciprocating said tuft guard means, and means operating in timed relationship with said holder shifting means operable to adjust said driving means to cause the tuft guard means to reciprocate on one or the opposite side of its normal position.

12. In a brush making machine, a shiftable holder for a brush back, a tufting device for acting on a back held in said holder, means for timed 19 shifting said holder step-by-step in timed relation to the operation of said tufting device to present new portions of the brush back to be tufted, tuft guard means mounted for reciprocatory movement parallel with said holder between a normal position assumed during insertion of a tuft by said tufting means and a withdrawn position, driving means for reciprocating said tuft guard means including a rockable cross head and a slide adjustable longitudinally of said cross head, and means operating in timed relationship with said holder shifting means determining the position of said slide on said cross head.

13. In a brush making machine, a shiftable holder for a brush back, a tufting device for acting on a back held in said holder, means for shifting said holder Stp-by-step in timed relation to the operation of said tufting' device to present new portions of the brush back to be tufted, tuft guard means mounted for reciprocatory movement parallel with said holder between a normal position assumed during insertion of a tuft by said tufting means and a Withdrawn position, driving means for reciprocating said tuft guard means including a rockable cross head, a slide adjustable longitudinally of said cross head, and means driven in timed relationship with said tufting device and acting through said slide to rock said c'ross head, and means ope'rating in timed relationship with said holder shifting means to position said slide on opposite sides of the pivot point of said cross head to cause rocking thereof in opposite directions from its normal position by said driving means.

14. In a brush making. machine having a tufting device and an eccentric means operating in timed'rel'ationship therewith, a tuft'guar'd mounted forreciprocation parallel to a brush back being tufted, and means for reciprocating said g'uard including means adjustable to cause reciprocation to take place in opposite directions away from a normal position or said guard.

Ina brush making machine having 'a tuiting device and an eccentric means operating in timed relationship therewith, a tuft guard mounted for reciprocation parallel to a brush back being tufted, and means for reciprocating said guard including a rockably mounted cross head,

means for rocking said cross head, and means for varying the point of action of said last mentioned means on said cross head to adjust the extent as well as the direction in which said cross head is rocked from a neutral position.

16. In a brush making machine having a tufting. device and an eccentric means operating in relationship therewith, a tuft guard mounted for reciprocation parallel to a brush back being tufted, and means for reciprocating said guard including a rockably mounted cross head, means for resiliently retaining said cross head in a normal position, means operative to rock said cross head out of normal position, and adjustable means varying the point of applica- 20 tion of said last means to said cross head to determine the extent as well as the direction in which the cross head is rocked from its normal position. r

17. In a brush making machine having a tufting device and an eccentric means operating in timed relationship therewith, a tuft guard mounted for reciprocation parallel to a brush back being tufted, and means for reciprocating said guard including a rockably mounted cross head, means for resiliently retaining said cross head in a normal :position, and means operative to rock said cross head out of normal position including a slide adjustable longitudinally of said cross head on either side of the pivot point of said cross head.

18. In a brush making machine having a tufting device and an eccentric means operating in timed relationship therewith, a tuft guard mounted for reciprocation parallel to a brush back being tufted, and means for reciprocating said guard including a rockably mounted cross head, means for resiliently retaining said cross head in a normal position, a slide adapted to be adjusted longitudinally of said cross head on either side of the point thereof, a tubular member pivoted on said slide, a rod slidable in said tubular member and connected at one end to the eccentric means, and a collar on said rod on the opposite side of said tubular member adapted to strike said tubular member and rock said cross head out of normal position with each rotation of the eccentric means.

19. A brush making machine comprising, in combination, a device for repeatedly performing a particular operation upon a brush back, a movable brush back holder, mechanism operable to position said holder in an initial position so that a brush back therein is positioned for operation thereupon by said device and thereafter shifting said holder step-by-step until the entire back held therein has been operated upon, said mechanism including means .coming into play after completion of the operation on a brush back for advancing said holder step-b'y-step until it is again in initial position, means for driving said device and said mechanism, and means operating in timed relation with said mechanism to arrest operation of said device while said mean coming into play after completion of the operation on a .brush back repositions said holder to initial position.

JOHN I. CARLSON.

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

UNITED STATES PATENTS Number Name Date 1,081,709 Winkler Dec. 16, 1913 1,144,712 Jobst June 29, 1915 1,512,588 Fisher Oct. 21, 1924

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