US1268551A - Mechanical movement. - Google Patents

Description

H. E. EBERHARDT. MECHANICAL MOVEMENT. APPLICATION FILED APR.25. 913.

1,268,551, E Patented J1u1e4,1918.

WITNESSES.

INVENTOI? ATTORNEY HENRY E. EBERI-IARDT, 0F NEWARK, NEW JERSEY, ASSIGNOR TO NEWARK GEAR CUTTING MACHINE 00., OF NEWARK, NEW

JERSEY.

JERSEY, A CORPORATION OF NET/V MECHANICAL MOVEMENT.

Patented June 4, 1918.

Application filed April 25, 1913. eria1 No. 763,498.

of New Jersey, have invented certain new.

and useful Improvements in Mechanical Movements, of which the following is a specification.

The invention relates primarily to machines such as a crank shaper for shaping,

metal by means of a reciprocating tool, and particularly to means for effecting the reciprocatory motion of the said tool.

The invention has for its object a lever of more simple construction and of greater rigidity than those in present use; and, moreover, to so mount the same that a more efficient transmission of power from the driving crank pin to the reciprocatory ram is obtained. A further object of the invention is to provide a lever having one member for both the cutting and the return stroke, which member shall afford greater proportional wearing surfaces than has heretofore been possible.

The nature of the invention will be best understood when described in connection with the accompanying drawings, in which- Figure 1 is an elevation, partly in section, of a crank shaper embodying the invention.

Fig. 2 is a side elevation thereof and partly in section.

Fig. 3 is a horizontal section taken on the line y-g Fig. 2.

Similar characters of reference designate corresponding parts throughout the several views.

Referring to the drawings, 1 designates the frame of the shaper in which is mounted a ram 2 to be reciprocated and carrying a cutting tool 3 slidably mounted with respect thereto, as is well understood. To effect this reciprocation of the ram 2, I employ a lever l, hereinafter more fully described, and hinged to the block 5 by means of a hinge pin 6, said block being adapted to be secured to the ram by means of a clamping plate 7 and handle 8. The lower end of lever 1 is preferably slidably arranged in a bearing 9, which in turn is fulcrumed on a shaft 10 of the frame 1. Near its upper end, the lever 4: is arranged to slide through a crank pin block or saddle 11, preferably of one piece, and with which a crankpin 12 of a driving gear wheel 13 cooperates. Gear .bearing surfaces 17-l7 and 18 18, preferably forming the periphery of a rectangular section, Fig. .3, and which act as ways for the crank pin block 11 to slide upon. It will be observed, moreover, that as the crank pin 12 and crank pin block 11 are actuated by the gear wheel 13, their turning motion is transformed into an oscillating motion of the lever 4 and which is compensated by the aforesaid mounting of the lower end of said lever, the upper end thereof effecting the reciprocation of the ram 2. During the forward or cutting stroke, the crank pin block 11 presses uponthe surface 17 of the said lever 1, and on the return stroke the pressure is transferred to the surface 17.

The lever itself is herein illustrated as a straight bar of uniform section throughout, contrary to the usual slotted construction, and is preferably made of forged steel, its simple form readily lending itself to the use of this material. Heretofore levers for the purpose herein set forth have been of unsymmetrical section and actuated by blocks running in ways usually cut into the lever, which is thus divided into two ribs or members-one operative for the cutting stroke and the other for the return stroke. It is obvious that in such constructions the working pressure tends to force the ways apart and to cause a side thrust out of the true plane of motion, producing thereby chatter, lost motion and noise. In the construction herein set forth in which the crank pin block completely surrounds the lever for the length of the block, heavy working pressures have no tendency to swerve the said block or lever out of their true working plane.

Furthermore, with the recent general introduction of high speed steel cutting tools, shaping machines are reciprocated at a higher number of strokes per minute than formerly; and, as a consequence, the various forms of lever heretofore in use tend to destroy the running balance, thus producing excessive wear between the connections of the crank pin, crank pin block or saddle and the ram block, as well as between the ways of the 'ram in the frame. The improved lever herein described provides for. a maXimum rigidity with minimum Weight, is unslotted and of substantially the same simple sectional formthroughoutits length, thereby a perfect running balance is obtained. The crank pin block or saddle,

m r v r, din mm; the p ph y of aid lever, a greater Wearing surface and more compact arrangement of parts is afforded than has heretofore been possible.

1. In combination: a frame, a carrier mounted to" reciprocate therein, a lever to actuate'said carrier and of substantially rectangular cross-section, a circumscribing block acting upon the peripheral Ways of said lever, and means to actuate said block.

eral Ways of said lever, and means to actuate 25 said block.

Signed at Newark, in the county of Essex and State of New Jersey, this 24th day of April, A, D. 1913.

HENRY E. EB-E AR T,

Witnesses:

HENRY J EBERHABDT, J. E. FELDMAN.

Copies ct this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' 1 Washington, D. 0;

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