USRE7475E - Improvement in power-hammers - Google Patents

Description

T S H A W.

Assignor. by mesne assignments to P. S. JUSTICE.

POWER HAMMER. ,Nd. 7,475. 7 Reissued Jan.23,1877.

Q a Q bk & u, a; s 'm screws d (1.

UNITED STATES PATENT IQFFIGE.

ASSIGNMENTS,

TO PHILIP S. JUSTICE, OF SAME PLACE.

IMPROVEMENT m POWER-HAMMERS'.

Specification forming part of Letters Patent No. 52,

894, dated February 27, 1866; reissue No. 2,398, dated November 27, 1866 reissue No. 7.475, dated January 23, 1877 application filedAugnst 5, 1876.

To all whom it may concern:

Be it known that THOMAS SHAW, of the city and county of Philadelphia, Pennsylvania, did invent a new and Improved Mode of Constructing and Operating Power- Hanuners; and the following is a full, clear, and exact description of the Same, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

The said invention of said SHAW consists in suspending a'hammer to a plate-spring, which is found to have great durability, in contradistinction to a spiral spring, which is very liable to early fracture by the severe torsional strains of a vibrating hammer that. has connection with a crank in such a man ner that the hammer is both lifted from, and forced down upon, the anvil by the united action of crank and spring, as hereinafter described; also in the provision of flexible connection, to absorb the destructive vibration of hammer, to prevent the destructive effect upon the machinery.

The Object of the invention is the construction of a compact and durable forging-ma chine, capable of running at high speeds, thus giving insures good work and rapid execution.

In order to enable others to use and practice the said invention, its construction and operation will now be described.

On reference to the accompanying drawings, which ,form a part of this specification, Figure 1 is a front view. Fig. 2 is a ver tical section on the line 1 2.

Similarletters refer to similar parts th roughout the several views.

a is the anvil-block, secured to wood base b by screws. 0 c are guide-rods, extending up to cap e, to which they are united by means of screws, and at which point is formed the jonrnalbearings for shaftf, for the purpose as hereafter described. Said guiderods 0 c are secured to anvil a by means of 'n n are two pillars, supporting shaft m, to which is Secured the main drivingpulley k and crank o, for the purpose of comthe hammer a velocity and force that.

l municating power to thehammer, through belt l, when said crank 0 is operated by the hand. Crank-shaft f has Secured to it, and carries fly-wheel g, counter-balance p, crank-disks h h, and belt-wheel 2', for the purposes hereaft'er described. as is a metallic spring, Secured to rod 1;, which enters the hollow sleeve to, and to which it is secured by set-screw 9. The upper end of the hollow rod to has a split-box journal-bearing, t, held together by screw 8, thatembraces the crank-pin. Screw 12 secures the rod to to journal-box. w is the hammer, secured on its upper end to belt6 by wedge 8. Said belt is Secured to spring at by means of screws J, all for the purpose as hereafter described. 3 is a shield to prevent heat from burning the belt. 2 is the die, secured to anvil a by means ofwedge4 and screw 5, as hereafter described. The hammer to can be made to Strike high or low by lengthening or shortening the rod 11 by screw 9. The weight of hammer can be regulated'by means of plug 3 inserted into or taken from the hammer, which alters the weight in proportion. In order to prevent the plug from unscrewing itself pin 10 is inserted. Spring 00 and belt 6, in combination with crank-pin and rod u, give the hammer afree and elastic motion. The device is also durable, as the belt prevents the sudden vibration of the hammer from being transmitted to the machinery. The wedge 4 secures the die a, by being forced under it by means of Screw 5.

The object of counter-balance p is to lift the hammer off the anvil-block when stopping. This can also be effected'by means of aspring pulling in the desired direction on a crankp The hammer is putin operation in this wise: On motion being applied to cranko motion will be communicated to crank-shaft f through belt Z, when the hammer w will have imparted to it a perpendicular vibratory motion of twice the stroke of the crank, more or less, according to speed of hammer.

This construction'insures a constant and firm connection of flexible material between the hammer and the running-gear, whereby screw 9.

an excess of motion and force is imparted to the hammer, causing the hammer to travel double the distance of the mechanism, imparting the motion without losing firm connection with any part of the running-gear.

The hammer can be adjustd to high and low work by means of the adjustable rod '2) entering sleeve u, and is held firmly in position by The shaft f is located at the top of the machine for the purpose of enabling forging to be done on both sides of the hammer.

It will be evident that the several parts of this machine can be variously moditied without any alteration in the result.

What is claimed as the invention of said SHAW, and desired to be secured by Letters Patent, is-

1. The combination of a plate-spring, as, of

flexible material,with the hammerw and crankpin, for the purpose of forcibly vibrating the hammer, by the rotating crank-pin, without the danger of destroying the intervening spring, substantially as set forth.

2. The belt 6, in combination with hammer w and spring as, for the purpose set forth.

3. The adjustable sleeve to, in combination with hammer w, spring as, and the crank-pin, for the purpose described. 4

4. The crank-shaft f, in combination with hammer w, spring 00, and connecting-rod u, all for the purpose substantially as set forth.

PHILIP SYNG JUSTICE.

Witnesses:

E. 0013B,- P. M. GETTIGAN.

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