US723400A - Feed mechanism. - Google Patents

Description

No. 723,400. PATBNTED MAR. 24, i903.

I. K. MAOKENZIB.

I FEED MECHANISM.

APPLIoATloN FILED APR. so. 1902.

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No. 723,400. PATENTED MAB.. 24, 1 903.

I. K. MAOKENZIE.

FEED MEGHA'NISM. AAAAAAAAAAAAAAAAA PB. ao. 1902.

press, and B the reciprocating plunger' of UNITED STAT-Es PATENT OFFOICE.

IRVINE K. MACKENZIE, OF BOSTON, MASSACHUSETTS, ASSIGN OR TO THE CONSOLIDATED FASTENER COMPANY, OF PORTLAND, MAINE.

FEED MECH'ANISM.

SPECIFICATION forming part of Letters Patent No. 723,400, dated March 24, 1903. Application filed April 30, 41902.y Serial No. 105,403. (No model.)

To all whom, it may concern; K

Beit known that I, IRVINE K. MACKENZIE, a citizen of the United States, residing at Bos-V ton, in the county of Suolk and Commonwealth of Massachusetts, have invented a new and useful Improvement in Feed Mechanisms, of which the following is a full specication.

My invention relates to power-presses or other machines in which one or more operations are performed upon a strip of metal or other material passing through the machine; and it consists in a new and improved mechanism whereby the said strip of metal or other material is by the movement of the machine itself intermittently fed through the machine, thereby allowing the operation or operations to be performed upon new portions of the strip of material, which are successively and regularly presented to the tool or tools.

I have shown my feed mechanism as applied to a power-press; but it is clearly adaptable as wellv to, any machine where an intermittent feed is required.

Referring to the accompanying drawings, wherein like letters represent like parts, Figure lis a front elevation of a power-press provided with myv improved feed mechanism. Fig. 2 is a vertical central longitudinal section of my improved feed mechanism. Fig. 3 is a vertical cross-section of same on'the line 3 3. Fig. 4 is an end elevation of same as viewed from the right-hand side in Fig. l.

In the drawings, A is the frame of a powersame.

C is a tool or punch carried bythe plunger B, which cooperates with a suitable stationary die D Vand stamps or punches the strip of material E, which is fed beneath the punch C by means of the feed mechanism X, as hereinafter described.

' My feed mechanism consists of the base G, secured to the frame of the machine A, the sliding carrier H, the gripping-lever I, the bell-crank J, the lugs K and K2 on the plunger B, vthe locking-lever L, and the guides M M. The carrier H slides in the base G, being held in place by the gibs g g, Fig. 3, and is moved back and forth by the grippinglever I, swiveled to the carrier II at i' and i actuated'by the be1lcrank J, which is pivoted to the machine-frame at j and in turn given-a reciprocating motion by contact with the lugs K' K2 on the plunger B of the machine.

VThe.gripping-lever I oscillates slightly on its pivot fr', the amount of oscillation being limited by the pin h, fixed to the carrier H and working in the slot i in the lever I. The lever I has on its under surface the grippingrib 2.

The stock E to be fed is passed between the two adjustable guide-rolls M M and undcr the locking-lever L, arranged as shown, and held in position by the spring Z, so that it allows the free movement of the stock toward the press, but prevents the slightest motion in the opposite direction, any pull in this direction tending to bring the lever nearer to an upright position, and thus grip the stock more firmly between its lower end and the base G. The stock is then passed through the carrier H beneath the grippingrib i2 of the gripping-lever I, and thence between the dies C D of the press.

The action of the'feed is as follows: As the plunger B of the press descends lthe lug K engages with the end of theb'ell-crank J, carrying its lower end, together with the gripping-lever I and carrier H, away from the center of the press. At the same time the gripping-lever I is oscillated slightly on its pivot t' sufficiently to lift the gripping-rib 2 up off of the stock beneath it. The carrier thus slides back over the stock, which is.

firmly held against any motion in the same direction by the lever L, as above described. During the upward movement ofthe plunger B the lug K2 engages with the bell-crank J, carrying its lower end, with the leverL y and carrier H, toward the center of the press. In this movement it will be seen that the lever I is oscillated-in the other direction, throwing the gripping-rib Q12 downfontothe stock and rmly pinching it against the bottom of the carrier H and feeding it toward the dies C and D. This pinching movement of the lever I is obtained by reason of the piv` otally mounting of said lever and the connection therewith of the bell-.crank lever J at the point shown. When the plunger is moving ICO upward, the movement of the bell-crank lever primarily moves the lever I on its pivotuntil contact is made with the material being fed, thereby forming a gripping-surface held under the force of the movement of the plunger and insuring the feed of the strip. After this combined engagement (that of the gripping-jaw and ot the bell-crank With the plunger) a further movement of the plunger causes the carrier to be moved bodily. It will be seen that the bell-crank J does not necessarily share the entire movement of the plunger B, as the lugs are spaced some distance apart. I provide the lugs K K2 with the set-screws 7c 71:2, which may be adjusted to engage with the bell-crank at the desired position of the plunger and a tine adjustment of the feed thus secured. y

By the arrangement of the pivots and gripping-rib i2 of the lever I an extremely firm grip is obtained on the stock, the Whole power required to move the carrier and stock being multiplied and exerted directly in the grip upon the stock, so that slipping is practically impossible.

I claiml. In a feed mechanism, a sliding carrier having an oscillating gripping-lever and connecting mechanism in combination with the reciprocating part of a machine, said gripping -lever binding upon the material being fed with the entire force of movement of the reciprocating part, substantially as described.

2. In a feed mechanism, a sliding carrier having an oscillating gripping-lever and connecting mechanism in combination with a locking-lever and the reciprocating part of a machine, said gripping-lever binding upon the material being fed with the entire force of movement of the reciprocating part, substantially as described.

3. In a feed mechanism, a sliding carrier having an oscillating gripping-lever and connecting mechanism in combination with a locking-lever and the reciprocating part of a machine and adjustable lugs secured to the reciprocating part so as to engage the free end of the bell-crank lever, said gripping-lever binding upon the material being fed with the entire force of movement of the reciprocating part, substantially as described.

4. A feed mechanism consisting of a carrier I-I having an oscillating gripping-lever I, a locking-lever L, and a bell-crank J, in combination with a reciprocating plunger having the adjustable bell-crank-engaging lugs K and K2, the connection between the lever I and bell-crank J causing said lever to be primarily moved to grip the material, this gripping being continued during the feed movement of the carrier, all arranged as and for the purposes substantially as described.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses,'on this 6th day of February, A. D. 1902.

IRVINE K. MACKENZIE.

Witnesses:

FRANK G. PARKER, G. A. HOLMES.

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