Electronically controlled horn for motor vehicles

Details Electronically controlled horn for motor vehicles Electronically controlled horn for motor vehicles

1990-03-14

1992-04-28

Isen, Forester W.

Communications: electrical

Audible indication

Ultrasonic pest control

340388, 381 96, H04R 300, G08B 300

Patent

active

051092123

ABSTRACT:
A horn comprising a diaphragm, an electromagnet, a transducer to sense the vibrations of the diaphragm and generate a vibration-dependent electrical signal, and a feedback circuit which controls a power supply to the electromagnet. The feedback circuit includes an electronic power circuit (E, IEP) controlled by a control circuit (.mu., F, CCS) arranged to adapt, condition and process the electrical signal from the transducer (S) in such a manner as to automatically determine the frequency and duty cycle for controlling the electronic power circuit (IEP) under the various environmental, electrical feed and constructional tolerance conditions of the horn.

REFERENCES:
patent: 4241334 (1980-12-01), Shintaku
patent: 4691361 (1987-09-01), Yoshino et al.
patent: 4727584 (1988-02-01), Hall

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