US177960A - Improvement in drop-hammers - Google Patents

Description

F. H. RICHARDS. DROP-HAMMER. .No.1-77,96 O Patented May 30,1876.

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UNITED STATES,

PA ENT CFFIGE.

FRANCIS RICHARDS, OF BRITAIN, ASSIGNOR OF ONE-HALF HIS RIGHT TO HOBART E. SMITH, OF NEW HAVEN, CONNECTICUT.

IMPROVEMENT m DROP-HAMMERS.

Specification forming part of Letters Patent No. 177,960, dated May 30, 1876; application filed November 15, 1875.

To all whom it may concern:

Be it known that I, FRANCIS H.RIoHARDs, of New Britain, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Friction-Roll Drop-Ham mers, which improvements are fully set forth'in the following specification, reference being had to the accompanying drawing, showing my newly-invented drop-hammer in perspective.

In the construction ofmy improved drop-hammerI employ,in common with others, two friction-rolls, RR, driven by pulleys P,one of which is removed from the drawing the better to exhibit the parts supported in bearings b and Z1 upon a frame, F, resting upon the top of guides G G, secured to anvil A, and between which guides the hammer slides freely. These parts, with their arrangement and operation, being extensively used and well known, I omit further description of them.

The object of the present invention is to provide such means of operating the hammer H as shall piace it completely under control of the operator, whereby it may be used with that variation of the weight and rapidity of the blows with which a blacksmith is accustomed to use his hammer upon the anvil-a result highly appreciated by all practical forgers.

This object I accomplish by giving to the board T, heretofore made straight throughout its length, the form of a wedge, widest at the upper end, as shown in the drawing. To render this tapered board efficient to give control of the hammer, as named, the frictionrull R is supported upon acarriage, U, operated from the hand-lever L by means of a rod, r, terminating in a wedge, W, at its upper end.

-The construction and arrangement of the parts, as thus described, being understood, it is obvious that if the rolls R R be made to revolve invsuch manner as to easily lift the hammer, and that if by the means described, or the equivalent, the roll R is moved to press against the board, the hammer will be lifted; but the said board being tapered, there is,

during its upward movement, continually a' such movement will be exactly proportionate to .the motion of the lever L, which, beingin the hand of the operator, gives him complete control of the hammer H, whereby the objectbefore named is accomplished.

I do not limit myself to the use of the wedge \V to communicate motion from the lever L to the carriage O, as it is obviously merely a matter of discretion whether one or another mechanical device shall be used therefor.

In the drawing I have shown no device for keeping the carriage'G against the wedge W when said wedge is raised, as, by belting the pulley P to a shaft at the left hand thereof, this is accomplished without any special device therefor; and by this means, also, the

rolls are held so far apart when the hammer is not in use as to prevent them from wearing the board out of'shape.

To better adapt the drop-hammer to forge articles requiring for their formation variousshaped dies or tools, D, the said die, may be arranged about and upon revolving die-beds B, which are shownretained in position by pins I claim- 1. The combination, with the hammer H and friction-rolls R R, of the tapered board T.

2. The combination, with the tapered board T and friction-roll R, supported in carriage O,

of the wedge W, or equivalent, and lever L.

FRANCIS H. RICHARDS.

Witnesses: v

HUBERT P; RICHARDS,

v HUBART E. SMITH.

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