US1371426A - Safety device for presses - Google Patents

Description

P. JONOR AND J. TOMCZEWSKI.

SAFETY DEVICE FOR PRESSES. I

APPLICATION FILED OCT. 4. 1919.

Patented Mar. 15, 1921.

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Specification of Letters Patent.

AND JQHIN' TQMCZEWSKI, OF NEWINGTON, CON-- NEGTICUT.

SAFETY DEVICE FOR PBESSES.

Patented Mar.-15, 1921.

Application filed October 4, 1919. Serial No. 328,538.

To allwhom tmaq concern:

Be it known that we, PETER JONOR and JOHN ToMcznwsKr, citizens ofPoland, r e siding sa1d J ONOR at New Britain and sand ments in Safety Devices for Ifresses, of which the following is a specification.

Our invention relates to improvements in safety devices for presses, of the form used as a guard or protection for the operator of a punch press or any of the various forms -of presses used for punching and forming? operations and particularly to prevent injury to the hands of the operator, and the. object of our improvement is to produce a device that is simple and reliablefor the purpose specified, and which, furthermore, is particularly effective and efiiclent in that it involves in use a' positive connection for I the hands of the operator with the moving part of the press whereby the hands are positively pulled away from the position of.

danger, between the two dies, before the dies come together 1n case the operator failed to himself remove the hands from the position of danger, and which device permits of the free use of the hands and arms to the extent necessary for such handling of the workas may be necessary between-the operations of the dies.

In the accompanying drawing 2-.- Fi re 1 is a front elevation of a press that is equipped with our improved safety device. i

Fig. 2 is-a similar'view, on an enla rged scale, of the safety device shown in Fig. 1

i and some of "the associated parts of the.

ress. p Fig. 3 is a similar view, with the parts in difierent' :position from that shown in l he press 10 shown and to which our improved safety device is applied is-a'conventional representation of a drop press or power press of'any of the usual forms, com

prising the bed 11 that supports the fixeddie 12 at the upper middle portion in the' usual manner and also supports in the usual manenr'a. pair of uprights 13 that extend upwardly from the said bed 11 positioned one on each side of the said fixed die 12,

may be positively driven by power for both the upward and the downward movement of the moving block 14. v

atsoever the method may be for operatlng the moving dle, in operating the press, durlng the per1od of separation of the dies the operator has occasion to bring either one or both hands in the space between the dies forhandlmg the work and must, in order to avoid injury, withdraw the hand or hands from such positlon before the dies come together. Accidents happen, resulting in inury to the operator, in cases in whlch such withdrawing of the hands from'the danger zone is left entirely to the action of the operator By the-use of our invention the operator can withdraw his hands from the danger zone freely, substantially in the same manner as if there were no safety device provided, but in case of neglect on the part of the operator to do so the safety device operates positively to pull the hands away, so that the operator is not relied upon for safe operation.

The manner of effecting this result is as follows :-The device is arranged duplex and symmetrical on the two sides, comprising for each side a cord 18 rove through suitable guide pulleys, connected by the upper end to the moving blockl and promoving block 14 in time to prevent being caught between the dies12 and 1 5.

I As shown, there are two guide pulleys for the cord, comprising for each side an upper pulley 21, posltioned to one side and-secured to the opposed upright 13 and preferably slightly above the uppermost position of the upper end of the cord 18, and the lower pulley 22, which, as shown,,is supported at about the level of the lower, fixed die 12 and to one side, being supported from the base 10 by a side bracket 23.

Sash-cord may be used for the cord 18. The upper end of the said cord 18 may be secured to an eye, as a screw-eye 24, 1n the front face of the block 14,

An elongated spring 25 may beprovided to take up slack, being secured by the lower I end of the bracket 23 and having the upper end 26 secured to the generally upwardly directed body portion 27 of the cord 18.

In some cases the cord may be inclosed by the coils of the spring.

e claim as our invention 1. A safety device for presses having a fixed die and a movable die comprising a cord having one end connected to the movable die, having the other end adjacent the fixed die and provided with means for ,being secured to the hand of the operator, and guide means for guiding the body portion of the said cord, and the parts being constructed and arranged to pull the said other end away from the said fixed die during the movement of the movable die, suitably to withdrawthe hand 6f the operator away from the danger zone between the two dies.

2. A safety device for presses as described in claim 1 and provided with an elongated spring, connected to the said cord, for taking upslack in the corddu'ring the movements of the movable die.

PETER JONOR. JOHN TO-MCZEWSKI.

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