US1701098A

US1701098A - Nail machine

Info

Publication number: US1701098A
Application number: US119327A
Authority: US
Inventors: Edwin F Brown
Original assignee: American Steel and Wire Company of New Jersey
Current assignee: American Steel and Wire Company of New Jersey
Priority date: 1926-06-29
Filing date: 1926-06-29
Publication date: 1929-02-05
Anticipated expiration: 1946-02-05

Description

Feb. 5, 1929. r 1,701,098

E. F. BROWN NAIL MACHINE Filed June 29. 1926 3 Sheets-Sheet jnvent'or: EPW/A/ f." BEOW/V,

llitizesses Feb. 5, 1929. v 1,701,098 E. F. BROWN Y NAIL MACHINE Filed June 29. 1926 s Sheets-Sheet 2 k\ I q h Inventor:

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lifhzesses:

E. F. BROWN NAIL MACHINE Feb. 5, 1929.

Filed June 29. 1926 3 Sheets-Sheet y .m QQMQM w M m .w m M MK. 5 n 5 m hm e \m i m f 1 N m, W 3v 5 E mu NM W Z N WHHHWWHIIIIIMHMIIHIHHIIHHHNIIM. \N p. I ..l .I/% C 5 w. Ft CL: W w V Sw 4 f/ MW r 5 g m Q a V Patented Feb. 5, 1929.

UNITED STATES v 1,701,098 PATENT OFFICE.

EDWIN F. BROWN, OF CLEVELAND, OHIO, ASSIGNOR TO THE AMERICAN STEEL AND WEE GOEPANY OF NEW JERSEY,

A CORPORATION OF NEW JERSEY.

N AIL MACHINE.

Application filed June 29,

This invention relates to nail making machines, and more particularly to the stock or wire feeding mechanism for such machines, and has for one of its objects the rovislon of a feeding mechanism connecte dlrectly to one of the reciprocating parts of the machine proper.

Another object is to provide a novel form, of feeding mechanism which may be accurately set to feed denite lengths of stock for forming the nails.

A further object is to provide a feeding mechanism for nail machines which may be adjusted and set while the machine is in operation.

A still further object is to provide anail making machine having the novel comblnation, construction and design of parts hereinafter described and claimed.

In the drawings-- t Figure 1. 's a plan view of a machine embodying my invention.

Figure 2 is a fragmentary side elevation, partly in section, of the machine of Figure 1.

Figure 3 is an enlarged plan of the forward end of the machine showing the feeding mechanism.

Figure 4 is an enlarged side elevation of the forward end of the machine.

Figure 5 is anelevation taken on the line VV of Figure 4.

Figure 6 is a' sectional elevation taken on the line VI-VI of Figure 4.

Referring more particularly to the drawings, the numeral 2 designates'the bed frame of a standard form of nail making machine. The usual power operated crank shaft 3 is journaled in bearings 4 in the machine and is provided with loose and tight pulleys 5 and 6 at one end to receive a belt from a suitable source of power (not shown). A fly-wheel 7 is mounted on-the other end of the crank shaft 3, A cross-head 8 is mounted for sliding move- 'ment in the frame 2 and is adapted to be i reciprocated by a pitman 9 connected to a crank portion 10 of the crank shaft 3.

A hammer holder 12 is secured to the forward free end of the cross-head 8, and has a hammer 13 secured therein adapted to cooperate with the pinch dies 14 to form the nail heads.

A pair of cutters or km'ves 16 are provided for cutting off and pointing the finished nails and a pair of operating levers 17 are 1926. Serial No. 119,327.

provided for operating the knives 16. The levers 17 are pivoted to the bed frame at 18 and are adapted to be rocked tooperate the cutters or knives by cam surfaces 19 on the cross-head 8.

The machine thus far described is old and well-known in the art and, therefore, will not be described further in detail.

The wire stock from which the nails are formed is fed into the machine through a series of straightening rollers 20 and then through a wire feeding block 21 into and through the dies 14.

The wire feeding block 21 is slidably mounted on a pair of guide rods 22 mounted in the bed frame 2 and is adapted to be reciprocated by a connecting rod 23 which has one end pivotally connected at 24 to the block 21 and has its other end pivotally connected at 25 to a pin 26'threaded into the cross-head 8. It will be understood that, if desired, the connecting rod 23 may be connected to the pitman 9 instead of to the cross-head 8.

The wire feedin block 21 has a passageway or opening 2 therethrough, through which the wire passes to enter the heading dies. The block 21 is provided with a recess 28 at one end of the passageway 27 to receive a thrust plate 29, and is provided with an opening or recess 30 extending parallel with the passageway 27 to receive a sliding wedge plate carrier 31. The carrier 31 is provided with a transverse opening 32 in whicha wedge plate 33 is loosely mounted so that it is free to be moved transversely toward and away from the thrust plate 29.

A recess 34 is formed to the one side of the opening 30 opposite the wedge plate 33 to receive a wedge block 35 against which the wedge plate 33 is adapted tomove when the carrier 31 is reciprocated.

The carrier 31 is provided at its forward or free end with transversel extending arms 36 which are apertured guide bolts 37 which extend through the apertures in arms 36 and are threaded into the block 21. Coiled springs 38 are mounted around the bolts 37 undertension and serve to normally move the carrier 31 forwardly so as to force the wedge plate 33. against the wedge-block 35 and toward the thrustplate 29 so as to grip the wire.

to receive A bracket support 39 is secured to the feed 1 bracket. The bell crank lever 40 has its one arm provided with an elongated opening 41 in which a pivot pin 42, which is secured in the carrier 31, is mounted. The other arm of the bell crank lever 49 is provided with a roller, 43 adapted to be engaged by trlpplng devices to be described.

* A tripping arm 44 is secured to the frame 2 and extends forwardly over the feeding'block 21 and into the path of the roller 43, so'that when the roller 43 engages the arm 44 it will rock the bell crank lever 40 about its pivotal mounting and exert a force on the pivot pin 42 "to move the carrier 31 against the tension of the springs 38.

A tripping block 45 is mounted on a bracket support 46 secured to the frame 2. The block 45 is 'slidably mounted in a guideway formed in the bracket 46, and is adapted to be moved longitudinally or toward and away from the arm 44 by an adjusting screw 47 j'ournaled in the bracket 46 and threaded in the block 45. A set-screw 48 is provided for locking the block 45 in adjusted position.

The operation of the 'w1re or stock feeding mechanism is as follows:

On the forward or forging stroke of the cross-head 8 the connecting rod 23 will move the feeding block 21 bodily forward, and due to the roller 43 on the bell-crank 40 being under the trippin arm 44 when the movement is commence the wedge carrier 31 will have been moved rearwardly to free the wedge plate 3. Therefore, the feeding block will move freely along the wire stock. When the roller 43 is moved out from under the trippin arm' 44, the springs 38 willtendto move the carrier 31 forward to force the wedge plate 33 to grip the wire. However, due to the fact that during the forward or for ing stroke of the cross-head 8 the wire stoc is gripped by the gripping of pinch dies 14 and that the movement of the feeding block is awayfrom thehigh point of the wedge block 35, the wedge plate will not grip the wire stock but will ride freely along the same. As the forward movement of the feeding block 21 continues the roller 43 will be engaged underthe tripping block 45 and the bell crank again rocked to move the carrier 31 against the tension of the springs 38 and positively free the wedge plate 33.

On the return or rearward stroke of the cross-head 8 the connecting rod 23 will move the feeding block in unison therewith. During this rearward movement of the block 21 the wedge plate 33 will move freely along the wire until the roller 43 moves out from under the tripping block 45 when the springs 38 will immediately force the carrier 31 forward so as to move the wedge plate along the Wedge block 35 and force the wedge plate 33 toward the thrust plate 29 so as to grip the wire stock between the

plates

33 and 29, and cause it to be moved into the machine with the continued movement of. the feeding block 21. As the feeding block 21 continues to move toward the machine the roller 43 will be engaged under the tripping arm 44 so as to rock the bell crank 40 and move the carrier 31 rearwardly and release the wedge plate 33 thereby stopping the feed of the wire stock and permitting the feed block 21 to move freely along the wire for the remainder of its stroke.

It will be apparent from the above that the wire stock is fed into the machine only while the roller 43 is not engaged under either the tripping arm 44 or block 45. Therefore, the

length of wire stock fed into the machine,

and consequently the length of the nail, is definitely determined by the length of the s ace between the arm 44 and block 45. The b ock 45, as above described, is adjustable to and away from the arm 44 so that the length of the wire fed into the machine may be readily varied. Attention is directed to the fact that. the block 45 may-be readily adjusted without stopping the operation of the machine to correct inaccuracies in the length of the finished nails, thereby saving considerable time over machines as heretofore provided,

since such machine had to be stopped in order to adjust the feeding mechanism.

While I have shown and described one spe .cific embodiment of my invention it will be understood that I do not wish to be limited thereto, since various modifications may be made without departing from the scope of my invention as defined in the appended claims.

- I claim:

1. In a nail machine having a bed frame, and nail forming dies on said frame, a wire stock feeding mechanism including a wire feeding block slidablymounted on said frame and having a wire passageway therethrough, means for reciprocating said block, a thrust plate mounted in said block at one side of said passageway, a wedge carrier slidably mounted in said block along the other side of said passageway, a wedge block secured in said feeding block, a wedge plate mounted in said wedge carrier and adapted to be reciprocated by said carrier so as to move along the wedge face of said wedge block, means for normally moving said wedge carrier and wedge plate against said wedge block so as to force said wedge plate toward said thrust plate so as to grip the wire to be fed into the machine, and means for automatically moving said wedge plate in the reverse direction ad acent the extremes of themovement of said feeding block.

2. In a nail machine having a bed frame, and nail forming dies on said frame, a wire stock feeding mechanism including a wire feeding block slidably mounted on said frame.

and having a. wire passageway therethrough, means for reciprocating said block, a thrust plate mounted in said block at one side of said passageway, a wedge carrier slidably'mounted in said block along theother side of said passageway, a wedge block securedin said feeding block, a wedge plate mounted in said wedge carrier and adapted to be reciprocated by said carrier so as to move along the wedge face of said .wedge block, resilient means for normally moving said wedge carrier and wedge plate against said wedgeblock so as to force said wedge plate toward said thrust plate so as to ripthe wire to be fed into the machine, a bel lcrank pivotally connected to said wire feeding block and having one arm connected to said wedge carrier,'and means for automatically rocking said bell crank adjacent the extremes of the movementof said feeding block so as to move said wedge car-i rier and wedge plate against thetension of said resilient means.

3. In a nail machine having a bed frame, and nail forming dies on said frame, a wire stock feeding mechanism including a wire feeding'block slidably mounted on said frame and having a wire passageway therethrough, means for reciprocating said block, a thrust plate mounted in said block at one side of said passageway, a Wedge carrier slidably mounted in said block along the other side of said passageway, a wedge block secured in said feeding block, a wedge plate mounted in said Wedge carrier and adapted to be reciprocated by said carrier so as to move along the wedge face of said wedge block, resilient means for normally moving said wedge carrier and wedge plate against said wedge block ,1

so as to force said wedge plate toward said thrust plate so as to grip the wire to be fed into the machine, a bell crank pivotall connected to said wire feeding block an having one arm connected to' said wed e carrier, a trip ing arm secured on said bed rame and exten. ing into the path of the .free arm of said bell crank, a tripping block support secured to said bed frame, a tripping block adjustably secured on said frame and extending into the path of the free arm of said bell crank and adjustable toward or away from said tripping arm, said bell crankbeing adapted to engage and berocked by said tripping arm and block adjacent the extremes of the movement of said feeding block so as to move. said wedge carrier and wedge plate against the tension of said resilient means to ment of said feeding block, said last named means bein adjustable to vary the point at which said ell crank will be rocked.

In testimony whereof, I have hereunto signed my name.

EDWIN F. BROWN.