Horology: time measuring systems or devices – Combined with disparate device – External alarm
Patent
1989-10-30
1991-03-12
Roskoski, Bernard
Horology: time measuring systems or devices
Combined with disparate device
External alarm
368258, 368257, G04B 4700
Patent
active
049998218
ABSTRACT:
A truck driver's wake-up device comprising a conventional mechanical alarm clock constructed from metal parts which are electrically conductive and having therein an alarm trip which moves in a predetermined path when an internal alarm system in the clock is actuated, a support for mounting the clock thereon, a high output buzzer capable of producing a loud alarm mounted on the support, the buzzer having first and second input leads for actuating the alarm when an input voltage of 8-16 volts DC is impsoed across the leads, a standard automotive cigarette lighter adapter having first and second outlet leads for providing approximately 12 volts DC output when the adapter is inserted into a standard cigarette lighter socket, the first output lead from the adapter being grounded to the clock, the second output lead from the adapter being connected to the second input lead to the buzzer, a non-conductive insulator plate connected to the clock adjacent the alarm trip, an electrically conductive spade connector attached to the insulator plate and in the path of movement of the alarm trip but out of electrical contact with the metal parts of the clock mechanism, the first input lead from the buzzer being connected to the spade connector whereby, when the internal alarm system for the clock is actuated, the alarm trip will contact the spade connector to complete the electrical circuit to the buzzer.
REFERENCES:
patent: 351746 (1886-11-01), Derrick et al.
patent: 546016 (1895-09-01), Kist
patent: 1886358 (1932-11-01), Salinger
patent: 3361973 (1968-01-01), Wysong
patent: 3678679 (1972-07-01), Lee et al.
patent: 4282596 (1981-08-01), Siefert et al.
patent: 4431312 (1984-02-01), Chambers et al.
Dorman William S.
Roskoski Bernard
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