US2031658A - Brush making machine - Google Patents

Description

Feb. 25, 1936. l.. E. JONES BRUSH MAKING MAC-Hime Filed Sept. 26, 1953 6 Sheets-Sheet 1 mw (W i.'tarneys Feb. 25, 1936. E JONES 2,031,658

BRUSH MAKING MACHINE K Filed Sept. 2 6, 1933 6 Sheets-Sheet 2 Feb. 25, 1936. 1 E. JONES 2,031,658`

,BRUSH MAKING MACHINE Filed Sept. 26, 1953 6 Sheets-Shag?. 3

Inventor ww y 3 da Feb. 25,` 1936. L. E. JoNl-:s 2,031,653

' BRUSH' MAKINQ MACHINE A Filed sept. 26, 1955 6 sheets-shet 4 .ittorneyi Feb. 25, 1936. L. E. JONES 2,031,658`

BRUSH MAKING MACHINE` Filed sept. 26, 1933 v e sheets-Sheet 5 Feb. 25, 1936. L. E JoNl-:s 2,031,658

BRUSH MAKING MACHINE I Filed Sept. 26, 1955 e sheets-sheet 6 Patented Feb. 25, 1936 BRUSH MAKING MACHINE Lloyd E. Jones, Pasadena, Calif., assignor to Food Machinery Corporation, San Jose, Calif., a corporation of Delaware Application September 26, 1933, Serial No. 690,996 4 claims. (ci. soo-s) This invention relates to a brush-making machine.

One of the primary objects of this invention is to provide a brush-making machine which will 5 operate on two brush cores simultaneously, so as to drill the bristle receiving holes in one core While the bristles are being inserted and stapled in a second core which has been previously drilled. In the past, it has been the practice to carry out the drilling and stapling operations successively in separate machines, one of which is designed for drilling the cores, and the other for stapling them so that by providing a machine in which both of these operations are simultaneously and automatically effected, a considerable saving is realized both in time and labor, thereby increasing lthe capacity of the machine while at the same time, decreasing the cost of production. and of equal importance, producing a superior product.

A further object is to provide a feed means for simultaneously advancing the brush core being drilled and the brush core being stapled through equal increments, whereby the-holes drilled into the first brush. core will accurately register with the stapling funnel of the stapling mechanism during the bristle inserting operation.

A further object is to provide a feed means operable for simultaneously advancing the two brush cores through predetermined longitudinal and angular distances during the inactive period of the drilling and stapling operations.

A further object is to provide a single drivin means operative for simultaneously actuating the brush core drilling and stapling mechanisms.

A further object is to provide a feed means which may be easily and quickly adjusted for increasing or decreasing the feed of the brush cores. f

A further object is tc provide means for disengaging the feed means from the automatic driving means therefor, in order to permit the brush core carriage to be easily and quickly returned to its initial starting position.

Other objects and advantages of the invention will become apparent as the nature of the same is more fully understood from the following description and accompanying drawings, wherein is set forth what is now considered to be a preferred embodiment. It should be understood, however, that this particular embodiment of the invention is chosen principally for the purpose of exemplication, and that variations therefrom in details of construction or arrangement of parts may accordingly be effected and yet rel looking toward the machine from the bristle stapling side thereof.

Figure 5 illustrates an enlarged fragmental sectional view of the bristle inserting funnel. Figure 6 illustrates an enlarged fragmental plan view of the lead screw disengaging means.

Figure 7 illustrates a sectional view taken substantially in the plane of line VII-VII of Fig. 6.

Figure 8 illustrates a sectional View. substantially in the plane of line VIII- VIII of Fig. 6.

Figure 9 illustrates an enlarged fragmental plan view of the mechanism for intermittently actuating the feed means and also partially showing the driving means for the drilling spindle reciprocating mechanism;

Figure 10 illustrates an enlarged fragmental sectional view taken substantially in the plane of line X-X of Fig. 9.

Figure 11 illustrates an enlarged fragmental sectional View` taken substantially in the plane of line XI-XI of Fig. 3, while Figure 12 illustrates a sectional View taken substantially in the lplane of line XII-)HI of Fig. 11.

The bristle inserting 'and stapling mechanism illustrated in the drawings may be of any suitable type or construction, as for example, as illustrated and fully described in the patent to William G. Liebig,'No. 845,959, dated March 5, 1907.

As previously pointed out, one of the important features of this invention resides in combining the drilling and stapling mechanisms into a single machine and providing such a machine with a single carriage for supportingtwo brush cores, and also for providing a feed means automatically operable for advancing the carriage a predetermined distance during the inactive period of the drilling and stapling operations, and for further arranging the feed means for simultaneously turning the brush cores through a predetermined arc while the carriage is being advanced. Due to the above combination, vthe series of bristle holes drilled into the brush core while in the ilrst or Y drilling position in the carriage, will be serially brought into accurate register with the stapling funnel of the bristle placing member, when placed in the second or bristle stapling position in the carriage. Thus any inaccuracies in the feed means will be translated to the brush core being drilled, and when this drilled core is placed in the bristle inserting position, the same inaccuracies will bring the holes previously drilled, into accurate register with bristle stapling funnel. This feature may be more clearly illustrated, as for example, should the lead screw have a slightly greater pitch between the fourth, and the tenth bristle holes, then at thiselocalitythe carriage supporting the brush cores wouldbe moved during each actuation a distance slightly greater than for other portions of the` carriage travel. However, as this slight inaccurate portion of the lead screw also acts when feeding this same portion of the brush core to the bristle stapling funnel, these holes having the greater spacing, will be accurately presented thereto. Of course, it is desirable to have the lead screw accurate as well as other portions of the feed mechanism, but the above example illustrates how the bristle holes will be accurately presented to the stapling funnel even though the feed of the carriage should be uneven throughout its length of travel.

In the preferred embodiment of the invention as illustrated in the drawings, the invention may include an appropriate frame 20 arranged to operatively support a pair of parallel bars 2l, which bars form the ways upon which the carriage 22 may slide back and forth. The carriage 22 may be of any suitable construction for operatively supporting two brush cores 23 and 24. As illustrated, the carriage may include a pair of spaced cross heads 25 and 26, each provided with a par of bearings 21 by which each cross head may be operatively mounted upon the frame ways or bars 2|. A spacer rod 28 may be securely fastened to the cross head 25 as at 29 (Fig. 7) and slidably projected through the bearing 30 of the crosshead 26. The crosshead 26 may be securely locked to the spacer rod 28 as by means of suitable collars 3l clamped to the spacer rod at each side of the bearing 30 by suitable screw means 32. By this arrangement the crosshead 26 may be moved to or from the crosshead 25 in order to accommodate brush cores of diiferent lengths.

The carriage 22 may be provided with means for supporting the brush cores 23 and 24, which means may include providing the crosshead 25 with a pair of spaced bearings 33 and 34 for journally supporting the brush core driving shafts 35 and 36. 'Ihe inner end of the brush core driving shaft 35 may be provided with a brush core supporting and driving collet 31, Iwhile the outer end thereof may be provided with a driven gear 38. Likewise, the inner end of the brush core driving shaft 36 may be provided with a brush core supporting and driving collet 39, and the outer end thereof with a driven gear 46. The brush core driving shafts 35 and 36 may be arranged to resist endwise motion by any suitable form of means not shown. The Acrosshead 26 may be provided with a bearing 4l in alignment with the crosshead bearing 33 and a bearing 42 in alignment with the crosshead bearing 34. A shaft 43 may be slidably mounted in the bearing 4l and provided at its inner end with a collet 44 for operatively supporting the adjacent end of the brush core 23, while at its outer end may be provided with a cotter key 45 operative for preventing shaft 43 from being propelled through bearing 4I due tol means 50 provided on shaft 41 between bearing 42 and the collet 46 for yieldingly retaining the collet in operative engagement with the brush core 24. v

A lead screw 5| may be operatively journaled in the frame bearings 52 and 53 (Fig. 9) and the carriage 22 may be releasably connected thereto by means of a split nut 54, whereby when the carriage reaches the end of its travel, the nut means 54 may be released from the lead screw so as to permit a rapid return of the carriage to its initial starting position. As may be observed most clearly from Figs. 1, 2 and 8, the split nut means 54 may include half portions 55 and 56, each of which may be slidably mounted in the slide way 51 formed upon the inner face of the crosshead 25 and operatively retained therein by means of a cover plate 58 secured to the crosshead by suitable screw means 59. Means may be provided for yieldingly retaining the two half portions of the split nut in operative engagement with the lead screw, which means may include providing each portion with a cam pin 60 (Figs. 6 and 8), each projecting through a slot 6| formed in the slide way 51 and into the eccentric cam slots 62 formed in the cam plate 63 operatively mounted upon the top surface of the slide way 51, as by means oi the shoulder screw 64. The cam plate 63 may be provided with a handle 65 for the convenience of operation, and with a spring 66 operative for yieldingly retaining the cam plate in its positions, as illustrated in Figs. 6 and 8, to yieldingly maintain the split nut in operative engagement with the lead screw. To release the half portions of the split nut from engagement with the lead screw, the attendant may grasp the handle 65 and rotate the cam plate 63 in a clockwise direction as viewed in Fig. 6, whereupon due to the eccentricity of the cam slots 62, the pins 66 and thereby the halves 55 and 56 of the split n ut, will be moved apart until finally the threads of these nut portions will completely disengage from the threads of the lead screw. While the split nut is retained disengaged from the lead screw, the carriage 22 may be moved back to its initial starting position.

Means may be provided for turning the lead screw a predetermined amount between each actuationx of the drilling and bristle stapling mechanisms. A great variety of means may be made use of for this purpose, but a simple and satisfactory means is illustrated in Figs. l, 9 and l0, wherein a crank shaft 61 appropriately journaled in the frame, is driven by means of a chain 68 and sprocket 69 from the countershaft 1|), by the driving sprocket 1I. To oneend of the crank shaft 61 is suitably mounted a crank disc 12, to the crank pin of which the lower end of the connecting rod 13 may be operatively journaled. The upper end of the connecting rod may be keyed to the wrist pin 14 by any suitable means, as for example, the pin 15. By this arrangement the Wrist pin 14 will oscillate with the actuation of the connecting rod 13. A rocker 16 may be journaled at one end upon the end of the lead screw 5| (Fig. 9) while the bifurcated free ends 11 thereof may be journaled upon the wrist pin 14 so as to straddle the connecting rod 13. By this arrangement, as the crank disc 12 rotates, the connecting rod 13 will cause the bifurcated end of the rocker to rock back and forth, and in order to utilize this motion for intermittently turning the lead screw 5|, a pawl and ratchet means may be provided. A pawl 18 may be pivoted intermediate the ends of the rocker 16 by means of the pivot pin 19, while a suitable ratchet wheel 80 may be securely keyed to the lead screw 5| and positioned to be engaged by the tooth 8| of the pawl. A spring B2 may be provided for yieldingly retaining the pawl in operative engagement with the ratchet wheel.

The lead screw y'turning means may include adjustable means for predetermining the rotation of the lead screw for each revolution of the crank shaft 61, which adjustable means may include an eccentric cam 83 journaled upon the inner end of the wrist pin 14 in position for the cam surface thereof, to engage the cam surface 84 of the pawl to throw the tooth 8| thereof out of engagement with the ratchet wheel 80, when the lead screw has turned a predetermined amount. The eccentric cam 83 may be frictionally retained at its adjusted position, by means of a spring Washer 85 held in place by means of the cotter pin 86. A handle 01 may be provided for turning the eccentric cam 89 for changing the releasing point of the pawl from the ratchet, and thereby the extent of turning moment given to the lead screw.

The two brush cores carried by the carriage may be simultaneously rotated during the time the carriage is being fed along the frame ways.

The means for simultaneously turning the brush cores may include providing the carriage with a driving gear 88 journaled in the forward end thereof. as clearly illustrated in Figs. 1, 6 and '7. This driving gear may be slidably mounted upon the lead screw and caused to rotate therewith, by means of a key 89 operative in the lead screw key wayv90. The driving gear 88 may be of such diameter as to nicely mesh with the brush shaft driving gears 38 and 40, whereby each time the lead screw is turned, the driving gear 08 will be turned to thereby turn each of the brush shaft driving gears 38 and 40 an equal amount. The gears 38 and 40 as previously described, are securely mounted upon the outer ends of their respective shafts 35 and 35, and thereby any rotation of these gears will correspondingly rotate the shafts, which in turn, will rotate the brush cores engaged by their respective collets 31 and 39. 'Ihus it may be observed that by intermittently turning the lead screw, the carriage will be fed longitudinally a predetermined amount, while simultaneously therewith, the two brush cores carried thereby will be simultaneously rotated.

The means for drilling the bristle holes in the rst brush dore, may be mounted on an adjustable bracket 9|, whereby the drilling head 92 thereof may be adjusted to accommodate brush cores of different diameters, or for other reasons. The drilling head may include a head stock 93 in which the spindle sleeve 94 may be slidably but -not rotatably mounted. A drill supporting and driving spindle 95 may be rotatably but not slidably mounted in the sleeve 94, and by this arrangement, as the sleeve 94 is reciprocated, the spindle 95 will also be reciprocated to thrust the drill 96 carried by the lower end thereof, into drilling engagementwith the brush core. Any suitable means may be provided for driving the drill spindle 94, as for example, a motor 91 may be supported upon the upper end of the bracket v9| and arranged to drive through` a. suitable coupling 98 a hollow shaft 99, which' shaft may be journaled in the bearing block |00. The upper end of the drill spindle 95 may be slidably mounted in the hollow shaft and driven thereby, by a suitable key |0|"carried 'by the hollow shaft, meshing with a suitable key way |02formed in the spindle. If desired, a drill guide-.96a may be mounted on the frame for the purpose of accurately guiding the drill as it starts' its drilling operation in the core. .f-

Means may b e provided for automatically reciprocating the'vdrill spindle sleeve 94, and thereby the drill spindle and drill in timed relation with the other elements of the machine. The drill reciprocating means may include asis most clearly illustrated in Figs. 11 and 12, an eccentric |03 operatively carried by the eccentric shaft |04 journaled as at |05 in the bracket 9|. A crosshead |06 may be slidably mounted upon the bracket 9| and may be provided with a slide way |01 in which the eccentric may operatively project, whereby as the eccentric is rotated, the crosshead will be reciprocated up and down to the extent of eccentricity of the eccentric. The crosshead |06 may be connected to the drill spindle sleeve 94 by means of a suitable bracket |08, whereby the sleeve 94 and drill spindle 95 will-be reciprocated by the crosshead.

In order to reciprocate the drill .spindle in timed relation with the carriage feed and the lbristle stapling means, the eccentric may be driven from the carriage feed crank'l shaft 61, which in. turn, is driven from the driving means for the bristle stapling mechanism. The eccentric drive may be by means of the sprockets |09, ||0, and chain shaft ||2 and bevel gears H3, one of which may be mounted upon the crank shaft 61. The driving ratio of this train of mechanism is such that with each revolution of the crank shaft 61, the eccentric |03 will be driven through a complete revolution, and the eccentric should be so timed as to feed and retract thel drill from the brush core during the time in which the connecting rod 13 is returning the pawl 18 to take a new grip upon the ratchet wheel 80, or in other words, the drill should finish its drilling operation during the inactive period of the carriage feed mechanism. K

As may be observed most clearly in Figs. 3 and 5, the bristle stapling mechanism may be provided with a main drive shaft ||4 driven through a suitable clutch means ||5 by a pulley ||6. The countershaft 10 previously referred to, may be driven from the main shaft as by means of the pair of sprockets ||1, ||8, and the chain ||9, while the several parts of the brush stapling mechanism may be driven from the main shaft as by means of the bevel gear |20 and spur gear |2|. means is provided for actuating the drilling, bristle stapling and brush core feed mechanism, whereby these several elements may berdriven in proper timed relationship. The details of construction of the bristle stapling machine are fully illustrated and described in the previously referred to patent, and therefore, it is deemed unnecesary to further describe this element.

The clutch ||5 may be controlled by a suitable lever |22 actuated by the rod |23 connected to an appropriate foot pedal, not shown.

Thus it will be appreciated a single drive Cai The brush making machine of this invention may be operated as follows: First, a brush core` to be drilled may be mounted between the collets 31 and 4l that is in the rst position in the machine, while a. brush core previously drilled may be moved from the first position to the second or bristle stapling position. The split nut is released by means of handle 65 and the carriage slid along its supporting ways until the first hole in the drilled brush core accurately registers with the stapling funnel |24, (Figs. 3 and 5) whereupon the handle 65 may be released to permit spring 66 to return the cani plate 63 to its original position, and thereby through the means previously described to slide the half portions of the split nut into engagement with the lead screw. The clutch [I5 may now be actuated to connect the driving means for the several elements with the source of power.

While the stapling mechanism is stapling a tuft of bristles in the ilrst hole, the drilling mechanism will be reciprocated to drill the rst hole in the new brush core. After the bristle stapling mechanism and the drill have been returned to their initial positions, the carriage feed means will come into play to advance the carriage a predetermined distance, and at the same time, simultaneously rotate both of the brush cores so as to bring the secondyhole drilled in the brush core, in accurate register with the stapling funnel of the bristle inserting mechanism, whereupon the stapling and drilling operations may be repeated. This process may be continued until a tuft of bristles has been stapled in each of the drilled holes of the one brush core, while the other of the brush cores will be drilled with thev appropriate number Vof bristle holes, and these holes will be drilled in such relation that when this core is placed in the bristle stapiing position, the holes drilled therein will accurately register with the stapling funnel as the machine progresses during its continued operation.

The combined machine has made it possible to greatly reduce the time and cost of producing a superior quality of cylindrical brushes.

Having fully described the invention, it is to be understood that it is not to be limited Lto the details herein set forth, but the invention is of the full scope of the appended claims.

I claim: 1

1. A brush making machine including a frame, a carriage slidably mounted thereon, a pair of brush core supporting means, each rotatably u mounted upon the carriage, a. drilling vmechanism mounted upon the frame and operable for drilling the bristle receiving holes in one of the two brush cores, a bristle inserting and stapling mechanism mounted upon the frame and operable for inserting and stapling the bristles in the other brush core, a drive means operable for intermittently and simultaneously actuating the drilling and bristle stapling mechanisms, and a feed means actuated by said drive means during the inactive period of said mechanisms for advancing the carriage and simultaneously rotating the pair of brush core supporting means a predetermined amount for 'each actuation thereof.

2. In a bru'sh making machine a frame, a led screw journaled therein, `a carriage slidably mounted upon the frame, means. for releasably connecting the carriage with the lead screw, a pair of brush core supporting means rotatably mounted upon the carriage, and gear means for operatively transmitting the rotation of the lead screw to the pair of brush core supporting means.

3. In a brush making machine a frame,/a lead screw journaled therein, a carriage slidably mounted upon the frame and in operative engagement with the lead screw, arpair of brush core supporting means rotatably mounted in the carriage, and gear means for operatively transmitting the rotation of the lead screw to the pair of brush core supporting means.

4. An intermittent carriage feed for a brush making machine, including a frame, a carriage slidably mounted thereon, a lead screw operatively journaled in the frame, a nut means for operatively connecting the carriage to the lead screw, a ratchet wheel carried by said lead screw, a rocker arm journaled upon the lead screw adjacent the ratchet wheel, a. crank disc operatively mounted in the frame and arranged to be driven by the driving means of the machine, a connecting rod operatively connecting the free end of the rocker arm to the crank disc, a pawl operatively carried by the rocker arm, means for resiliently urging the pawl into engagement with the ratchet wheel, and means for controlling thc extent of engagement of the pawl with the ratchet wheel for in turn controlling the amount of rotation given to the lead screw for each rotation of the crankvdisc and thereby intermittently advancing the carriage a predetermined distance.

LLOYD E. JONES.

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