US1468953A - Drop hammer - Google Patents

Description

Sept. 25, 1923; 1,468,953

J. R. BLAKESLEE DROP HAMMER Filed March 14 1921 3 Sheets-Sheet 1 John E. B/mcs /ee sepiz. 25,1923. 1,468,953

J. R. BLAKESLEE DROP HAMMER Filed March 14 .1921 s Sheets-Sheet 2 J. R. BLAKESLEE DROP HAMMER Filed March 14 1921 5 Sheets-Sheet 5 6 c Y %#%E T6 N NM 2 fi/ w M 7 E U fw 7 7 8 Sept. 25, 1923.

JOHN B. BLAKESLEE, OF CLEVELAND, OHIO, ASSIGNOR TO THE AJAX MANUFACTUR- ING COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

DROP finmmna.

Application filed March 14, 1921.

To all whom it may concern:

Be it known that I. JOHN R. BLAKESLEE, a citizen of the United States, and a resident of Cleveland, county of Cuyahoga, and State of Ohio, have invented a new and useful Improvement in Drop Hammers, of which the following is a specification, the principle of the invention being herein explained and the best mode in which I have contemplated applying that principle, so as to distinguish it from other inventions.

The present improvements, relating, as indicated, to drop hammers, have more particular regard -to an improved driving mechanism for such hammers whereby the use of belts or other flexible driving connections is done away with. My improved driving mechanism is particularly adapted for use with an electric motoras the source of ower.

o the accomplish. ;rent of the foregoing and related ends, said invention, then, consists of the means hereinafter fully described and particularly pointed out in the claims, the annexed drawings and the following description setting forth in detail certain mechanism embodying the invention, such disclosed means constituting, however, but one of various mechanical forms in which the principle of the invention may be used.

In said annexed drawings Fig. 1 is a front elevation of a drop hammer embodying my improved drive mechanism; Fig. 2 is a side elevation thereof as viewed from the left in Fig. 1; and Fig. 3 is a plan.

The general features of construction, so far as illustrated in the drawings, will be recognized as familiar. These include, in other words, the weighted hammer holder 1 that is slidably held between vertical uides 2 formed integral with the frame 3.

ttached to said holder 1 is the board 4 that extends upwardly between the two lifting rollers or spoolers 5. It is to the mounting of the latter, and the mechanism provided for rotating same in proper direction to lift the board 4 and attached hammer holder 1 that attention is desired.

Said rollers 5 are keyed or otherwise nonrotatably mounted on spindles 6 journaled in the lower ends of frames 7 that depend from shafts 8 mounted in upwardly extending portions 9 of frame 3 so as to lie on opposite sides of the board 4 and in parallel relation Serial No. 451,935.

thereto. These frames are accordingly free to be swung or oscillated about shafts 8 as axes so as to move the rollers 5 into or out of contact with the board 4 as desired. Such movement or adjustment of the frames is effected through the medium of two rock shafts 10, one for each frame journaled in the main frame of the machine, each such rock shaft having eccentrics 11 on its respective ends that are connected with the corresponding frame 7 through the medium of links 12. Each rock shaft furthermore is provided with an outwardly projecting lever or arm 13, to the free end of which is attached the upper end of rod 14 in the one case, and a similar rod 15 in the other. Rod 14 has its lower end threaded and provided with adjusting nuts 16 whereby the roller 5 operated thereby may be set in predetermined position, this roller being adjusted only to take up wear. In conjunction with the other rod 15, however, there is provided the usual latch 17 and trip 18, (not shown in detail) whereby the rollbr corresponding with said rod is normally pressed against the board 4, but is released when the upper limit of the hammer stroke is reached.

For driving the rollers or spoolers 5, gears 20 are mounted on the opposite ends of each spindle 6 that mesh with pinions 21 on the corresponding shafts 8. A tubular housing 22 is provided at the respective ends of frame 7 to enclose such gears 20 and pinions 21. Mounted in turn on corresponding ends of shafts 8, which project for the purpose a short distance beyond main frame extensions 9, are intermeshing gears 23 where by it will be seen the spindles 6 are interconnected so that rotation thereof will be in opposite directions, while at the same time said spindles are free to be swung apart from each other, as by oscillation of the frames 7 or either of the latter. For the purpose of thus driving the spindles 6 power is preferably derived from anelectric motor 24 supported on a suitable bracket 25, and having a pinion 26 on the spindle that meshes with one of the aforesaid gears 23. It v '11 be understood of course that power derived from any suitable source may be applied to either of the shafts 8 without departing from the spirit of my invention.

The arrangement, however, just described provides a simple and compact form of drive whereby an electric motor may be used to operate a drop hammer of the type in question, which. so far as I am aware, has never heretofore been accomplished satisfactorily despite the obvious desirability of employing individualmotor drives for such machines.

Other modes of applying the principle of my invention may be employed instead of the one explained, change being made as regards the mechanism herein disclosed, provided the means stated by any of the following claims or the equivalent of such stated means be employed.

I therefore particularly point out and distinctly claim as my invention 1. In a drop-hammer, the combination of a vertically reciprooable board; frames oscillatory about axes on the respective sides of said board and parallel therewith; rollers carried by said frames adapted upon inward movement thereof to contact with said board; and gearing for driving said rollers including an intermeshing gear and pinion respectively coaxial with each roller and the pivotal axis of the corresponding frame, and means for driving said pinions in opposite directions.

2. In a drop-hammer, the combination of a vertically reciprocable board; frames oscillatory about axes on the respective sides of said board and parallel therewith; rollers carried by said frames adapted upon inward movement thereof to contact with said board; and gearing for driving said rollers including an intermeshing gear and pinion respeotively coaxial with each roller and the pivotal axis-of the corresponding frame, and two intermeshing gears connected with said pinions respectively.

3. In a drop-hammer, the combination of a messes vertically reciprocable board; two shafts rotatably mounted on opposite sides and parallel with said board; a frame oscillatorily mounted on each of said shafts; a roller carried by each frame and adapted upon inward movement of the latter to contact with said board; a ear coaxial with each roller; a pinion on t e corresponding shaft inter-connected with such gear; and two intermeshing gears mounted on said shafts respectively.

4. In a drop-hammer, the combination of a vertically reciprocable board; two shafts rotatably mounted on opposite sides and parallel with said board; a frame oscillatorily mounted on each of said shafts; a roller carried by each frame and adapted upon inward movement of the latter to contact with said board; a car coaxial with each roller; a pin ion on t e corresponding shaft inter-connected with such gear; two intermeshing gears mounted on said shafts, respectively; and a motor arranged to' directly drive one of said last-named gears.

5. In a drop-hammer, the combination of a vertically reciprocable board; two shafts rotatably mounted on opposite sides and parallel with said board; a frame oscillatoril mounted on each of said shafts; a shaft with a roller thereon carried by each frame and adapted upon movement of the latter to contact with said board; a ear on one end of one roller-shaft and a similar gear on the opposite end of the other such shaft; pinions on the corresponding ends of the corresponding frame-shafts meshing with said gea.rs,

respectively; and two intermeshing gears mounted on said res ective frame-shafts.

Signed by me, t is 12th day of March,

JOHN R BLAKESLEE;

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