Electrical apparatus with reverse audible alarm

Details Electrical apparatus with reverse audible alarm Electrical apparatus with reverse audible alarm

1988-06-30

1989-12-26

Salce, Patrick R.

Electric power conversion systems

Current conversion

With means to selectively provide d.c. of either polarity

340657, 340680, H02M 702

Patent

active

048902152

ABSTRACT:
In a preferred embodiment, a reversible DC power supply having an audible alarm, especially for use with electrochemical metallizing equipment. The audible alarm is electrically connected directly to the controls of the power supply so that when the power supply is placed in its "reverse" mode, the audible alarm will continuously sound, thus alerting the operator that the power supply is in that mode. In other embodiments, reversible electric tools, such as drills, may be provided with an audible alarm to indicate when they are in their reverse states.

REFERENCES:
patent: 3569927 (1971-03-01), Guyton
patent: 3629819 (1971-12-01), Peterson
patent: 3827024 (1974-07-01), Anderson et al.
patent: 3905016 (1975-09-01), Peterson
patent: 4413248 (1983-11-01), Staerzl
patent: 4602203 (1986-07-01), Bragdon
patent: 4763017 (1988-08-01), Campbell et al.

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