US1257237A - Safety attachment for drop-forging and stamping machines. - Google Patents

Description

J. R. Hu'sGms. SAFETY ATTACHMENT FOR DROP FORGING AND STAMPING MACHINES.

APPLICATION FILED OCT. 23. I916- gately ed Feb. 19, 1918. Q

JOHN ROBERT HUGGINS, OI CANTON, OHIO.

SAFETY ATTACHMENT FOR, DROP-FORGING AND STAMPING MACHINES.

Specification of Letters Patent.

Application filed October 23, 1916. Serial No. 127,300.

To all whom it may concern:

Be it known that I, JOHN ROBERT HUG- GINS, a citizen of the United States, residing at Canton, in the county of Stark and State of Ohio, have invented certain new and useful Improvements in Safety Attachments for Drop-Forging and Stamping Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

This invention relates to new and useful improvements in safety devices for attachment to drop forge stamping machines and the object in view is to produce a simple and efficient device of this nature so arranged and actuated that the hands of an operator will be thrown away from the stamping machine when the head of the press is thrown toward the die.

The invention consists of a simple and efficient apparatus of this nature having various details of construction and combinations and arrangements of parts which will be hereinafter fully described, shown in the accompanying drawings and then specifically defined in the appended claim.

I illustrate my invention in the accompanying drawings, in which Figure 1 is a front elevation showing the application of the invention to a stamping press.

Fig. 2 is a front elevation of the safety device detached.

Fig. 3 is a view at right angles to Fig. 2.

Reference now being had to the details of the drawings by letter, A designates a bar having an elongated slot B therein adapted to receive set screws O which are fastened to the frame of the press and which hold the bar A in different adjusted positions. The lower portion of the bar has a laterally extending arm D carrying a pin E. F is a bell crank lever having an elongated slot H in one arm, in which the pin E has a play. Said bell crank lever is pivotally connected at its angle with a pin or stud I which is fastened to the front of the reciprocating head K of the press. One arm of the lever F carries the set screws N which pass through the elongated slot O of the bar S, the latter being held in different adjusted positions relative to the arm through the medium of set screws N. One end of the bar S has a rearwardly extending finger T which is adapted to have a laterally Patented Feb. 19. 1918. p

swinging motion as the head of the press is raised and lowered.

In operation, the parts of my safety attachment are fastened to the frame and press head in the manner shown in Fig. 1 of the drawings and, as the head of the press is raised, the adjustable bar S is swung to a position shown in solid lines in Fig. 1 and, on the downward throw of the press head, the bell crank lever F will tilt upon the stud or pin I and the bar S with finger T will swing laterally for the purpose of throwing the hand of the operator away from the die during the operation of the machine. It will he noted that the device is automatic in its action and, when the press head is raised, the adjustable bar S will be out of the way of the operator.

IVhat I claim to be new is In combination with a drop forging and stamping machine, comprising a frame with a reciprocating cross head, a right-angled bar having an elongated slot therein, and means for adjustably mounting the same upon said frame with one end projecting laterally beyond the inner edge of said frame and provided with a boss, a bell crank lever having an elongated slot in one arm, a pin carried by said projecting end and passing through and having a sliding movement in said slot, a stud secured to said cross head and having pivotal connection with said bell crank lever, and a slotted bar having a rearwardly extending finger adjust-ably secured to the other arm of said bell crank lever.

In testimony whereof I hereunto afiix my signature in presence of two witnesses.

JOHN ROBERT HUGGINS. IVitnesses ARTHUR U. BORDNER, HENRY B. MCLAUGHLIN.

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

Washington, D. 0.

Images