Anti-theft detector and alarm systems for vehicles

Claim 2

Anti-theft detector apparatus for use on a motor vehicle to actuate an alarm element in an alarm circuit, said detector apparatus comprising a mounting base secured to the vehicle having an upper rounded support surface and a radially extending slot, a tubular housing having a mount portion in its upper end including a narrowed neck portion positioned in said slot and terminating at its upper end in an enlarged head portion seated on said upper rounded support surface for swingingly supporting said tubular housing from said base so that the tubular housing maintains a vertical attitude independently of the inclination of the vehicle, a generally spherical contact member suspended from a cable for free swinging movement in the housing and electrically connnected to an external terminal mounted on said head portion, said external terminal being connected in said alarm circuit, and a ring-like contact member concentric with and normally spaced from the suspended contact member and electrically connected to a second terminal on said head portion, said second terminal connecting in said alarm circuit, whereby a movement of the vehicle causes the suspended contact member to move in a pendulum action into engagement with said ring-like contact member to short-circuit said first and second terminals and thereby complete said alarm circuit to said alarm element.

Claim 3

Anti-theft detector apparatus as set forth in claim 1 wherein said mounting base is enclosed in a vehicle-mounted housing having a bottom opening through which a portion of said tubular housing extends.

Claim 4

Anti-theft detector apparatus as set forth in claim 1 including a releasable clamp secured on said vehicle-mounted housing to rigidly secure the tubular housing against swinging movement when not in use.

Claim 5

An anti-theft detector for use on motor vehicles to actuate an alarm element in an alarm circuit, said detector comprising a housing swingingly supported from the vehicle so as to maintain a vertical attitude independently of the inclination of the vehicle, a pair of contact members within the housing and connected in the alarm circuit, said contact members being spaced apart and movable into contact with one another, one of said contact members being suspended for free swinging movement whereby a movement of the vehicle causes the contact members to contact one another to complete the alarm circuit, and an actuator shaft extending above and transversely of the top of the elongated housing from which said suspended contact member is supported for a free swinging movement in said elongated housing, said actuator shaft being adjustable laterally of the upper end of said elongated housing to move said suspended contact member to a selected elevation in said housing.

Claim 6

An anti-theft detector for use on motor vehicles to actuate an alarm element in an alarm circuit, said detector comprising a housing swingingly supported from the vehicle so as to maintain a vertical attitude independently of the inclination of the vehicle, a pair of contact members within the housing and connected in the alarm circuit, said contact members being spaced apart and movable into contact with one another, one of said contact members being suspended for free swinging movement whereby a movement of the vehicle causes the contact members to contact one another to complete the alarm circuit, and an actuator shaft extending above and transversely of the top of the elongated housing from which said suspended contact member is supported for a free swinging movement in said elongated housing, said actuator shaft being adjustable laterally of the upper end of said elongated housing to move said suspended contact member to a selected elevation in said housing.

Claim 7

An anti-theft detector for use on motor vehicles to actuate an alarm element in an alarm circuit, said detector comprising a housing swingingly supported from the vehicle so as to maintain a vertical attitude independently of the inclination of the vehicle, a pair of contact members within the housing and connected in the alarm circuit, said contact members being spaced apart and movable into contact with one another, one of said contact members being suspended for free swinging movement whereby a movement of the vehicle causes the contact members to contact one another to complete the alarm circuit, and an actuator shaft extending above and transversely of the top of the elongated housing from which said suspended contact member is supported for a free swinging movement in said elongated housing, said actuator shaft being adjustable laterally of the upper end of said elongated housing to move said suspended contact member to a selected elevation in said housing, said suspended contact member being generally spherical in shape and hAving a ring-shaped section around its center, the outer contact surface area of said ring-shaped section inclining outwardly and downwardly and the inner associated contact surface area of the other contact member inclining outwardly and upwardly to decrease the air space therebetween as said suspended contact member is elevated.

Claim 8

An anti-theft detector for use on motor vehicles to actuate an alarm element in an alarm circuit, said detector comprising a housing swingingly supported from the vehicle so as to maintain a vertical attitude independently of the inclination of the vehicle, a pair of contact members within the housing and connected in the alarm circuit, said contact members being spaced apart and movable into contact with one another, one of said contact members being suspended for free swinging movement whereby a movement of the vehicle causes the contact members to contact one another to complete the alarm circuit, and an actuator shaft extending above and transversely of the top of the elongated housing from which said suspended contact member is supported for a free swinging movement in said elongated housing, said actuator shaft being adjustable laterally of the upper end of said elongated housing to move said suspended contact member to a selected elevation in said housing, said suspended contact member being generally spherical in shape and hAving a ring-shaped section around its center, the outer contact surface area of said ring-shaped section inclining outwardly and downwardly and the inner associated contact surface area of the other contact member inclining outwardly and upwardly to decrease the air space therebetween as said suspended contact member is elevated.

Claim 9

Anti-theft alarm apparatus for use on a motor vehicle to actuate an alarm element comprising a detector on the vehicle having a set of normally open contact members adapted to momentarily close when the vehicle is moved, and an alarm circuit including means responsive to a momentary engagement of said contact members to actuate said alarm element for a predetermined time interval each time said contact members are closed, said vehicle having a DC battery and a horn, said horn serving as the alarm element and being actuated from said vehicle battery, and a secondary alarm circuit triggered by the disconnecting of said vehicle battery, said secondary alarm circuit including an auxiliary battery arranged for connecting the power from said auxiliary battery to an audio generator having its output coupled to the input of a radio broadcast receiver.

Claim 10

Anti-theft alarm apparatus for use on a motor vehicle to actuate an alarm element comprising a detector on the vehicle having a set of normally open contact members adapted to momentarily close when the vehicle is moved, and an alarm circuit including means responsive to a momentary engagement of said contact members to actuate said alarm element for a predetermined time interval each time said contact members are closed, said vehicle having a DC battery and a horn, said horn serving as the alarm element and being actuated from said vehicle battery, and a secondary alarm circuit triggered by the disconnecting of said vehicle battery, said secondary alarm circuit including an auxiliary battery arranged for connecting the power from said auxiliary battery to an audio generator having its output coupled to the input of a radio broadcast receiver.