Device for measuring the stopping time of working machines

Details Device for measuring the stopping time of working machines Device for measuring the stopping time of working machines

1975-05-14

1976-10-26

Rolinec, R. V.

Electricity: measuring and testing

Electrical speed measuring

Including 'event' sensing means

73511, G04F 800

Patent

active

039886735

ABSTRACT:
A device for measuring the stopping time of working machines is provided with first and second switches for synchronically breaking the current to the working machine and starting a time meter, and a third switch for stopping the time meter when the working movement of the working machine has ceased. For the actuation of the first and second switches, the measuring device is provided with a first abutment entrained by the working machine and, in its turn, entraining a second abutment which is provided with its own power source for releasing the second abutment from the first abutment, thereby to actuate the third switch when the working movement of the working machine has ceased.
There is a regulation, with particular regard to presses such as edging presses, eccentric presses and similar working machines, that the press should be provided with information concerning the braking time corresponding to the maximum stopping distance of the press. The stopping time of the press must be predetermined with such accuracy that, in the event of a fault in the press, the stopping time does not increase to an extent which may give rise to accidents. Thus, the safety margin of the press should be such that there is no risk for the operator to be injured during the press movement.

REFERENCES:
patent: 2591124 (1952-04-01), Bogan
patent: 3628142 (1971-12-01), Harris
patent: 3744424 (1973-07-01), Poppet

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