Communications: electrical – Selective – Having indication or alarm
Patent
1982-09-13
1987-02-03
Caldwell, Sr., John W.
Communications: electrical
Selective
Having indication or alarm
340523, 307 10AT, B60R 2504
Patent
active
046411240
ABSTRACT:
A motor vehicle antitheft alarm provides complex sounds, is disabled in normal use of the vehicle, and is resistant to "hotwiring" of the ignition notwithstanding. Unauthorized motion of the vehicle causes a disturbance sensor to activate the alarm circuit. Qualitatively different alarm sounds are provided in response to repeated disturbances as compared with isolated ones. When the ignition is turned on in normal use, a first voltage condition is provided to disable the alarm apparatus. After the ignition is turned off a short time of disabling is provided to permit the user to leave the vehicle before the alarm can be activated. An anti-hotwiring turn-on circuit associated with the ignition switch provides a second voltage condition, or allows same, blocking the first voltage condition from occurring during hotwiring. A voltage-sensitive circuit sets off the alarm when the second voltage condition occurs, deterring hotwiring. The alarm automatically turns off after a period of time, conserving battery power and affording owner convenience. When the vehicle is a motorcycle or moped, the center stand is provided with a switch for preventing alarm sounds during normal maintenance with the center stand down. A backup battery and other circuit-protecting measures are providable in the alarm unit which is located in a secure part of the vehicle.
REFERENCES:
patent: 2823367 (1958-02-01), Huron
patent: 3461423 (1969-08-01), Trumble
patent: 3562706 (1971-02-01), Mason
patent: 3585584 (1971-06-01), Behrend
patent: 3611287 (1971-10-01), Hoff et al.
patent: 3634724 (1972-01-01), Vest
patent: 3649962 (1972-03-01), Bedard
patent: 3659266 (1972-04-01), Meyerle
patent: 3683362 (1972-08-01), Schwanenflugel
patent: 3728675 (1973-04-01), Horn et al.
patent: 3755778 (1973-08-01), Kennedy et al.
patent: 3772646 (1973-11-01), Keith et al.
patent: 3781804 (1973-12-01), Lederer
patent: 3824403 (1974-07-01), McGuirk
patent: 3866168 (1975-02-01), McGuirk
patent: 3968474 (1976-07-01), Danahey
patent: 3979740 (1976-09-01), Forbat
patent: 4006452 (1977-02-01), Giacino
patent: 4053869 (1977-10-01), Quercia
patent: 4107962 (1978-08-01), MacKinnon
patent: 4151507 (1979-04-01), Willis
patent: 4291296 (1981-09-01), Seifers
patent: 4302747 (1981-11-01), Belmuth
patent: 4349812 (1982-09-01), Healey
patent: 4358750 (1982-11-01), Webster
patent: 4518946 (1985-05-01), Solomon
patent: 4551703 (1985-11-01), Bourauel
"`Tips` For Customizing Your Installation", Milo Systems, Fullerton, Cal., Mar. 31, 1983.
"New Motorcycle Alarm" by I. Berger, Popular Mechanics, 139(6), Jun., 1973. p. 180.
"Stop Burglars With Electronics" by H. Phillips, Radio-Electronics, vol. 42, Nov., 1971, pp. 35-36.
"SN76495 Complex Sound Generator", Texas Instruments, Jan. 1981, 10 pp.
"Alarm Circuits Using the Texas Instruments SN76495N" by T. Mahler, undated, 3 pp.
"Motion Alarm" drawings, Texas Instruments engineer, 10/27/81, 2 pp. preceded by circuit sheets for SN16923N, 4 pp., and thyristors, 2 pp.
Caldwell Sr. John W.
Heim Michael F.
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