Control circuit for a press

Details Control circuit for a press Control circuit for a press

1979-07-16

1981-11-03

Bonck, Rodney H.

192 clutches and power-stop control

Stop mechanism

Safety device

100 53, 192131R, B30B 1514

Patent

active

042981140

ABSTRACT:
A control circuit for a press can perform various control functions simply by electrically detecting two modes of change, i.e. from OFF to ON and from ON to OFF, of a single rotary cam switch mounted on a press. Until reaching a first slide stroke angle at which the first change of the rotary cam switch takes place, operation of the press depends upon an ON or OFF state of a push button and thereafter the operation continues regardless of the ON-OFF state of the push button. After reaching a second slide stroke angle at which the second change of the rotary cam switch takes place, the operation of the press is stopped with the slide being stopped at a top dead center regardless of depression or non-depression of the push button and restarting of the press function is prevented in case the push button is kept depressed.

REFERENCES:
patent: 2639796 (1953-05-01), Dean
patent: 2830686 (1958-04-01), Blume et al.
patent: 2886155 (1959-05-01), Hadley
patent: 2893529 (1959-07-01), Hadley
patent: 2905838 (1959-09-01), King et al.
patent: 3004647 (1961-10-01), Andrus et al.
patent: 3249820 (1966-05-01), Stimmel
patent: 3509976 (1970-05-01), Coon
patent: 4072222 (1978-02-01), Coon

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