USRE2398E - Improvement in power-hammers - Google Patents

Description

BEST AV COPY:

ST AVEHLABLE COPY T. SHAW.

Power Hammer.

I Reissued' Nov. 27, 1866.

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BEST AVAILABLE COPY UNITED STATES PATENT OFFIGEQ IMPROVEMENT lN POWER-HAMME RS.

Specification forming part of Letters Patent No. 52,894, dated February 27, .1866; Reissue No. 2,398, dated November 27, 1866.

To all whom it may concern.-

Be it known that THOMAS SHAW, of the city and county of Philadelphia, State of Pennsylvania, has invented a new and Improved Mode of Constructing Power-Hammers and I do hereby declare that the following is a full, clear, and exact description of the same, reference being bad to theaceom panyingdrawings, and to the letters of reference marked thereon.

The saidinvention of said SHAW consists in suspending a vibrating hammer to a spring with a flexible belt, by means of which agreatly-increased force and momentum can be obtained from the blow of the hammer without the danger which attends-the use of other hammers when driven with equal rapidity.

In order to enable others to use and practice the said invention, I will proceed to describe its construction and operation.

On reference to the accompanying, drawin gs, which form apart of this specification, Figure 1 is a front-view. Fig. 2 is a vertical section on the line 1 and 2.

Similar letters refer tosimilar parts throughout the several views.

a. is theanvil-block, secured'to wood bascb by wood-screws.

c c are guide-rods extending up to cap 0, to which they are united by means of small screws, and at which point is formed the journal for shaft f, for the purpose as hereinafter described. Said guiderods 0 c are secured to anvil a. by means of screws cl cl.

n n are two pillars supporting shaft m, to which are secured main driving-pulley 7a and for the purpose of communicating e hammer through belt I when said perated by the hand. Shaft-f has and carries fly-wheel j, countercrank-disks h h, and belt-wheel i, urpose as hereinafter described.

,p a metallic spring secured to rod 11, which asters hollow rod n, and to which it is secured The hammer to can be made to strike high or I low by means of lengthening or shortening rod a by screw J. The weight of hammer can be regulated by means of plug y being inserted into or taken from the hammer, which alters the weight in proportion. In order to prevent plug from unscrewingitself, pin 10 isinserted.

Springwand belt 6,iu combination with crankpin and rod u, give the hammer a free and elastic motion. It is also durable, as the belt is not aflected by the sudden vibration of the hammer. Wedge 4 secures die z by being forced under it by means of screw 5.

The object of counter-balance p isto lift the hammer oii' the anvil block when stopping. This can also be effected by means of a spring pulling on a cranlr pin in the desired direction.

The hammer is put in operation in this wise: On motion being applied to cranks 0 motion will be communicated to cranlt-sliaftt through belt i, when the hammer in will have a perpendicular vibratory motion of twice the stroke of the crank.

that is claimed as the invention of said SHAW, and desired to secure by Letters Patout, is

The combination of a vibratory hammer with the spring and flexible belt, substantially as described.

PHILIP S. J USTIGE. Witnesses:

JOHN WHITE, Gno. R. TAYLOR.

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