Starting safety control for a glassware forming machine

Details Starting safety control for a glassware forming machine Starting safety control for a glassware forming machine

1980-10-23

1982-07-06

Kellogg, Arthur D.

Glass manufacturing

Processes

With measuring, sensing, inspecting, indicating, or testing

65158, 65159, 65DIG13, 364473, 364476, C03B 940

Patent

active

043381154

ABSTRACT:
A starting safety control circuit for preventing automatic starts after a stop is accomplished in a glassware forming machine. When the machine start switch is actuated, a flag is reset. When the start switch is released, the flag is set. If the machine undergoes a stop, the subsequent actuation of the start switch and the presence of the flag will enable the machine to enter its start and run routines respectively. If the start switch fails in the on mode, the reset flag is not set and, after a stop, the machine is disabled by the presence of the reset flag even though the start signal is being generated by the failed start switch. The resetting and setting of the flag can be delayed by different predetermined times to prevent stray siganls or inadvertent momentary actuation of the start switch from changing the status of the flag. The machine stop can result from the actuation of an emergency stop switch, a programmed stop switch, or a sample switch.

REFERENCES:
patent: 3762907 (1973-10-01), Quinn et al.
patent: 3905793 (1975-09-01), Croughwell

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