Method and apparatus for monitoring an electrically actuated too

Details Method and apparatus for monitoring an electrically actuated too Method and apparatus for monitoring an electrically actuated too

1975-03-06

1976-06-08

Swann, III, Glen R.

Communications: electrical

Systems

Call station

72DIG4, 340253A, 340419, G08B 2100

Patent

active

039626946

ABSTRACT:
A method and apparatus for monitoring an electrically actuated tool. The current flowing in the tool circuit is sampled and converted to an analog voltage signal that is proportional to the maximum stress level output of the tool. This converted signal may be displayed and recorded as desired. The converted analog voltage signal is compared with signals representing the current flow that will produce the highest and lowest acceptable stress levels delivered by the tool and a logic control signal is produced if the analog voltage signal is outside the acceptable range. The logic control signal is used to prevent recycling of the tool so that subsequent tool operation is not possible until corrective procedures are instituted. Further, the logic control signal may be used to activate audio and visual indicators. Moreover, the logic control signal can be used to introduce a load into the total circuit to modify the current delivered to the tool and therefore change its output.

REFERENCES:
patent: 2681443 (1954-06-01), Caulk, Jr.
patent: 2971808 (1961-02-01), Aller et al.
patent: 2978689 (1961-04-01), Tech et al.
patent: 3075636 (1963-01-01), Manning et al.
patent: 3419791 (1968-12-01), Mishkovsky
patent: 3555537 (1971-01-01), Windley
patent: 3596544 (1971-08-01), Pitman
patent: 3735248 (1973-05-01), Reese
patent: 3816816 (1974-06-01), Schweitzer, Jr.

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