US 1757367 A
Description (OCR text may contain errors)
May 6, 1930. w. Hx-:RTZBERG 1,757,367
MACHINE FOR MAKING TUFTS ON WIRE BRUSHES M'y 6, 1930. w. HERTZBERG 1,151,367
MACHINE FOR MAKING TUFTS ON WIRE BRUSHES Filed Oct. 3, 1927 .'5 Sheets-Sheet 2 //S ATTORNEY' May`6, 1930. w. HERTZBERG 1,757,367
MACHINE FOR MAKING TUFTS ON WIRE BRUSHES Filed 001;. 3, 1927 s sheets-sheet 3 www Patented May 6, 1930 UNITI-:D STATES `'ILLIAM' HERTZBERG, OF BROOKLYN, NEW YORK MACHINE FOR MAKING TUFTS ON WIRE BRUSHES Application led Ootolrr` 3, 1927. Serial No. 223,732.
These tufts have heretofore been `formed by hand and my invention is embodied in a ma-` chine for forming these tufts.
It is an object of the invention to produce the tufts quicker, more uniform in size and more safely tied than by hand work.
It is another important object of the invention to safeguard the hands of the operator which are often injured by the binding wire when tying tufts by hand, this danger is eliminated by my invention.
With these and other objects in view the invention consists in a novel machine for the purpose above specified embodying a novel combination of devices to obtain its objects; all as hereinafter described and nally pointed out in the appended claims.
In the accompanying drawings which form a material part of this disclosure:
Fig. 1 is a front elevation of the machine.
Fig. 2 is a top plan of the machine.
Fig. 3 is a vertical elevation on line 3-3 of Fig. 1.-Parts are shown in section as indicated by said line.
Fig. 4 is a vertical section on line 4-4 of Fig. 2 similar to Fig. 3 but the vertical twisting shaft 45, is turned 90 deg.
Fig. 5 is a sectional end elevation of the machine on line 5-5 of Fig. 1.
Fig. 6 is a detail elevation showing a brush inserted in the machine for tuft forming.
Fig. 7 is a detail section at line 7 7 of Fig. 6, showing a side elevation of stem guide 55.
Fig. 8 is a side elevation of a brush showing a finished tuft thereon.
Fig. 9 is a plan on line 9-9 of Fig. 3, showing the tuft forming jaws 49--50 in section through aperture 53a.
Referring to the drawings Fig. 8 illustrates a twisted wire brush 15 on .which 15a is the tuft, the product of the machine embodying the invention.
The brush 15 including its stem 15b is formed by other means which do not form a part of this disclosure. Before the tuft forming operation is begun the wires which form the stem 15a end at the plane indicated by line 8-8 of Fig. 8. They are covered by bristles up to that plane, and these bristles are in a position like the other brush-forming bristles, radiating outwardly from the stem 15b.
In Fig. 1 numeral 2O indicates a plate suitably supported on legs 21. Plate 20 supports a pillow block 22 supporting at its upper end a journal 23 in which the horizontal shaft rotates by means of hand operated fly wheel 25. A bracket 26 on block 22 holds a vertical rod 27 with fork 27a at its upper end. The lower part of rod 27 is of reduced diameter, surrounded by a helical spring 28 and guided in an aperture of table 20. Spring 28 presses fork 27a against shaft 24 and produces a brak-` ing action against shaft 24 to prevent its spinning.
The front part of shaft 24 supports the wire-guide-arm 30 which carries in a forkshaped portion a wire reel 29 which contains binding wire 31 for tying the tufts. The guide arm 30 is fastened to shaft 24 and ro tates with the same while reel 29 rotates on shaft 24. A spring 29u prevents reel 29 from spinning freely. The horizontal partof arm 30 supports the wire 3l and guides it to the twisting mechanism, for this purpose arm 30 is provided with apertures 32 and a slot 33 in its inclined nose piece 30a. There is also a spring 34 mounted on arm 30 which may be tightened against wire 31 by means of screw 35 to adjust the tension of the wire.
To the lower side of table 2O two pillow blocks 40 are attached extending vertically downward therefrom. These blocks hold a horizontal shaft 41 journalled in their bearings. To one end of this shaft a hand wheel 42 is fastened and to the other end a bevel gear 43, which meshes into a bevel pinion 44 and drives a vertical twisting shaft 45. Ball thrust bearings `46 and a journal 47 hold shaft 45 rotatably on table 20. The axis of shaft if extended would pass through the slot 33 and tip of nose piece 30a. An angular plate 48 is fastened to the upper end of shaft 45. The vertical portion of this plate carries the tuft forming jaws 49 and 50 of which 49 is rigidly fastened to 48, and 50 oscillatably mounted thereon on pivot 51.
The tuft' forniingjaws are held in closed position by means Vof a helical tension spring 52 attached to the lever 509- (see llig. 3). An inward pressure against y50a opens the slot A53 and aperture 53a in jaws 49 and 50. Aperture 53a is in axial .'alinement with shaft A horizontal guide bracket 54 is fastened to plate 48 whereon the stem support 55 is slidably mounted and'can be fastened to bracket 54 by means ofa thumb screw 56. Stem support 5 5 consists of two liat springs which lie tight against each other in their lower/portion and form a c lindrical uide 55@L in axial y g f v'alinenient with the aperture 5 3a of the tuft slotted apertures in plate TO.. vertical forming jaws 49v and 50 and with the vaxis of shaft 24. The free end of the two springs are bent outwardlyto form lips 55h acting entrance guide *forr the stein of a wire brush 15, they facilitate the separation of the springs by the brush-stem l5b when theV operator presses it downward into the guide ,552
The front Jfaces of` angular plate 48 and of jaws 49 and 50 are held Iperpendicular to arm 30 by means of a horizontal stop-plate 70 provided with a shallow recess at its front end which engages the narrow side of plate 48. Stopplate is held above table 20 by a block 7l upon which it slides beging held thereon by studs 72 which pass vtl'irough les' 70a on plate 70 is pressed again-st block 7l by a helical compression spring 73 which leans against the head of a stud 74. This stud is held in block 7l and passes through an aperture in leg 70a. `VVhe'n plate 48 rotates about the vertical axis of shaft 45 it alternately escapes from the recess in plate 70 and is arrested thereby as soon as it returns Vto a position perpendicular to arm .30.
the main part ofthe stem 15b between thev springs 55 to enter into `Guide 55a. He adjusts stern support 55, sliding it on bar 5,4 so that a distance of free stein remains between the bristles forming -the brush and support 55. This distance is shorter than the distance which l5, protrudes'beyond jaws 491 and Q- Whse the brush. is sfere-fly placed-in the machin@ the erstem pulls' the. Stem and. brush backward so that the bristles touch the support 55 as shown in Fig. l and turns the brush slightly on its axis during this operation. Hereby the tuft'15n at the front end of the brush is formed as the bristles in front of jaws 49 and 50 are bent into .horizontal position in passing through the aperture 53a. To facilitate this bending the forward portion. of aperture 53 is lightly rounded asindicated in Fig. 9. As the brush was not pulled back as much as the stem protruded beyond the jaws 49-5Q a part thereof will still protrude therefrom and form a core for the tuft 15a. The operator then holds the end of binding wire 3l between the two iingers of his left hand approximately at a (Figs. 6 and l) and turns hand wheel 25 a few revolutions; this turns arm 3,0 around the brush aXis and winds the binding wire 8l tightly upon the stein end l5c which protrudes beyond jaws 49-50 and upon the bristles of the tuft 15a. with which it is covered. 1When the tuft is sufficiently tied in this manner the operator stops turning wheel 25 and starts to turn hand wheel 42 still holding the end of bindingfwire at a. The turning of tween tuft l5a and point a about the other part of binding, wire which extends from nose piece 30a to the ltuft l5a about which it was previously twisted. ln this manner the tuft is securely tied and the wire prevented fromunraveling. The operator then cuts the binding wire at line Z) of Fig, 4 andV bends the twisted binding wire to lie iiat against the solid portion of the tuft having its ends imbedded between the radial bristles. The brush is then removed from the machine. The whole operation ofrforming a tuft requires yonly a' few seconds of time.
laying thus described my invention what l claim is new and wish to secure by Letters Patent is: f
l. ln a machine of the hind described, a frame, a holder adapted to support a brush having a stem and brush material surrounding the stern, a shaftronsaid fraine,the stem of a brush in said holder being in axial alinement with said shaft, and Vmeans on said holder for dividing the brush material into parts and for shaping a tuft from-one part of the brush material and meanson said shaft for ceiling wire upon the tuft shaped by said holder. j
2. In a machine of the kind described a frame, a holder adapted to support a brush having a stern and bristles radiating transversely therefrom, a shaft on said frame, the
stem of a brush in said holder being in axial