Transducer switching system

Details Transducer switching system Transducer switching system

1976-04-02

1977-06-07

Cooper, William C.

Electricity: circuit makers and breakers

Multiple circuit control

Pivoted contact

179 1E, 200276, H04R 100

Patent

active

040284913

ABSTRACT:
A transducer switching system for, in effect, removing electrical energy from a transducer without breaking the electrical circuit. A resistor is in series with the transducer. An electro-mechanical switch shunts the resistor. The switch is within the enclosure containing the transducer. When the acoustic connector of a use-element, such as a stethoscope type headset for a listener, is inserted into the enclosure the switch is changed from its normally open state to a closed state, thereby shorting out the resistor and allowing an effective level of electrical power to operate the transducer. Two systems may be simultaneously actuated for stereophonic sound.

REFERENCES:
patent: 2765365 (1956-10-01), Grosh et al.
patent: 3353625 (1967-11-01), Scanlon
patent: 3463886 (1969-08-01), Scanlon
patent: 3610830 (1971-10-01), Daleiden
patent: 3842230 (1974-10-01), Kashio et al.

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