Robbery-repelling alarm system

Claim 1

A robbery-repelling alarm system for an automobile comprising: theft sensing means composed of a group of sensing switches connected in parallel, a group of sensing switches connected in series, a silicon-controlled rectifier connected between a power source and both groups of sensing switches; a shouting alarm which comprises a driving motor for driving a prerecorded cassette tape, a magnetic head receiving signals from said cassette tape, first amplifying transistors and a final amplifier amplifying singals from the magnetic head and a pair of loudspeakers for producing human warning speech from signals from the final amplifier; several distributing switches connected to the power source and means for locking the engine of the automobile in response to operation of said distributing switches, wherein the locking means comprises a relay and a contactor breaker actuating an ignition coil of the engine ignition system; and a telephone dialing alarm which comprises a prerecorded alarming unit, a pulse dialing means and means for connecting the prerecorded alarming unit and the pulse dialing means to a telephone line, wherein the prerecorded alarming unit and pulse dialing means both use a second cassette tape of which one end is transparent with several opaque zones thereon to produce dialing pulses for an emergency call and the remaining tape is prerecorded with an alarm message for reporting an intrusion or asking for help from relevant sources; wherein the shouting alarm, locking means and telephone dialing alarm are triggered by said theft sensing means.