Metal deforming – With use of control means energized in response to activator... – Sensing tool or tool-linked part
Patent
1978-09-05
1980-07-08
Larson, Lowell A.
Metal deforming
With use of control means energized in response to activator...
Sensing tool or tool-linked part
72444, 192131R, B21J 920
Patent
active
042110980
ABSTRACT:
The application discloses a control system for a mechanical press in which two separate control circuits must simultaneously produce control signals to operate the ram through its ram cycle. If either of the control circuits produces a spurious output or intermediate signal or fails to produce a proper output or intermediate signal, circuitry will detect such occurrences and stop or prevent operation of the ram. A plurality of checking circuits constantly monitor input signals, intermediate signals, and output signals to insure that the press is not activated by spurious signals. A circuit is provided to allow the run buttons to be used to initiate an upstroke of the ram of the press, and an indicator transmits information to the operator of the press to indicate operational status of the press.
REFERENCES:
patent: 3628357 (1971-12-01), Luenser
patent: 3666965 (1972-05-01), Luenser
patent: 3730313 (1973-05-01), Luenser
patent: 3749005 (1973-07-01), Einecker et al.
patent: 3887052 (1975-06-01), DelFaro et al.
patent: 3889503 (1975-06-01), Luenser
patent: 3931727 (1976-01-01), Luenser
patent: 4063627 (1977-12-01), Wright
patent: 4113079 (1978-09-01), Wright
Larson Lowell A.
Verson Allsteel Press Company
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