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3975722 |
Protective alarm system
A vibration sensitive electrical alarm system comprising an electrically conductive pendulum means swingably suspended from an axle member, a pendent body pivotally attached to said axle and having...
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3961323 |
Cargo monitor apparatus and method
A container monitoring system has a small transmitter unit adapted for easy attachment to and removal from a container such as a truck, trailer or railroad car when not in motion and a receiver...
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3961310 |
Vehicle anti-tampering anti-theft protection system
A theft protection and alarm system for vehicles including a latching solenoid fuel cutoff valve, and a vibration and motion sensitive switch together with door, trunk and hood switches for...
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3914738 |
Motor vehicle alarm system
An alarm system for the gasoline supply of a motor vehicle is described wherein an alarm is triggered when access to the gasoline supply for the motor vehicle is attempted. The system is operated...
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3873966 |
Audible alarm for motor vehicle
A signalling device for emitting an audible warning in response to the unauthorized attempt to gain access to the fuel tank filler neck of a motor vehicle has a normally open gravity-actuated...
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3864675 |
MOTION RESPONSIVE SWITCH AND ALARM SYSTEM
An alarm system is provided including a motion responsive switch and a transmitter connected to the switch and energizable thereby when the switch is subjected to appropriate movement whereby...
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3858131 |
APPARATUSES FOR MAKING DEVICES, SUCH AS ALARM DEVICES, OPERATIVE
Apparatus for triggering alarm devices including a mechanical pendulum, the oscillating end of which is provided with a load of magnetic material and an electromagnet arranged adjacent the load to...
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3828310 |
BICYCLE THEFT ALARM
A theft alarm system for warning of unauthorized use of a bicycle or similar movable article employs a pendulum switch to sense movement of the article. The switch actuates a warning alarm, which...
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3824541 |
ANTI-THEFT DEVICE FOR BICYCLES AND THE LIKE
An alarm device mountable to the frame of a bicycle or the like is adapted to emit a highly audible sound if the bicycle is removed from a parked position. The device includes a sound generating...
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3824539 |
VEHICLE TAMPER ALARM SYSTEM
An alarm network for incorporation in a vehicle having a battery, horn and headlights, in which a relay switch is provided controlling the power supply from the battery to the horn and headlights....
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3820066 |
BURGLAR AND PERSONAL PROTECTION ALARM FOR VEHICLES
An alarm flasher on a vehicle is triggered by an inertial trigger for a predetermined time interval after the trigger is disturbed. The trigger is activated only after a predetermined amount of...
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3818437 |
ANTI-THEFT DEVICE FOR AUTOMOTIVE VEHICLES
An automotive anti-theft device includes a tilt actuable switch mounted on a gimbal. The switch actuates an alarm when the vehicle is tilted from its parked position. The switch aligns with the...
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3800279 |
AUTO ANTI-THEFT SYSTEM
An auto anti-theft system or unit characterized in that when the key operated lock switch thereof is momentarily turned to On position, (1) a valve in the unit is actuated to a position blocking...
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3792435 |
AUTOMOBILE THEFT PREVENTION ALARM SYSTEM
An automobile theft prevention alarm system having an externally mounted control switch operated by the automobile operator to activate the alarm system. The alarm system comprises a central relay...
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3772646 |
VEHICLE ANTI-THEFT TILT ALARM SYSTEM
Disclosed is an apparatus for detecting changes in the inclination of a vehicle at rest including a suitable alarm which is activated by a sensing mechanism when a change in the inclination of the...
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3772645 |
VEHICLE ALARM SYSTEM
An alarm system for detecting movement of an object to which the alarm is attached when the object or the alarm is moved, having a power source which can be a battery, an audio signal means, a...
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3755778 |
CYCLE BURGLAR ALARM
Unauthorized use or movement of a cycle is prevented by an electrical circuit including tilt and tamper switches connected with a wheel engaging retractable cable and alarm device controlled by a...
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3728675 |
CYCLE ALARM APPARATUS
Alarm apparatus suitable for attachment to a motor-cycle for producing an audible alarm when an unauthorized person tilts the cycle from the rest position in which it was left. The apparatus...
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3725890 |
MOTION SENSITIVE ALARM SYSTEM
A motion sensitive alarm system having a sensing mechanism for actuating an alarm device in response to rotational motion, i.e., being tilted, as well as in response to linear motion. The alarm...
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3721956 |
THEFT ALARM OPERABLE BY VIBRATION
An alarm is attached to a device such as a bicycle and operates when the device is moved. The alarm is controlled by a key switch which is turned on when the device is left unattended and must be...
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3715533 |
VEHICLE PENDULUM ALARM SWITCH
An alarm system for automobiles and other vehicles is disclosed in which pendulum switches are provided, including one wherein the sensitivity can be readily adjusted.
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3714628 |
VEHICLE ELECTRICAL LOCKING AND ALARM SYSTEM
The present invention, when applied to a vehicle, or other instrumentality, is to prevent unauthorized use of the vehicle or other device on which it is installed, and to prevent tampering with any...
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3710371 |
PORTABLE SECURITY ALARM AND ALARM SYSTEM
A portable alarm system including at least one alarm device triggered when displaced from a normal position. A mercury switch triggers a latching type semi-conductor switch, causing electrical...
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3699515 |
MOVEMENT RESPONSIVE ALARM SYSTEM FOR A VEHICLE
An automatic alarm system which sounds an upward screaming siren produced by an electronic siren module and a speaker including movement responsive switches for activating the alarm, a latching...
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3673562 |
ANTI-THEFT DEVICES FOR MOTORCYCLES, BICYCLES AND THE LIKE
In an anti-theft device for a motorcycle or the like, a key-operated interrupt switch and a normally open solenoid switch are in series between a power source and a signal means. A tilt switch is...
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3668675 |
REMOTE ALARM SYSTEM
A vehicle alarm system is disclosed which incorporates an acceleration-sensitive pendulum connected to a relay operated radio transmitter so as to signal silently to a remote station any movement...
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3659265 |
ANTI-THEFT DETECTOR AND ALARM SYSTEMS FOR VEHICLES
Alarm apparatus for use on motor vehicles includes a detector having a self-leveling mount and a relatively heavy, generally spherical contact member which is adjustably suspended from a cable and...
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3650347 |
AUTOMOBILE SAFETY AND ANTI-THEFT DEVICE
An automobile safety and anti-theft device consisting of a housing portion on a driver's seat located between the driver's thighs. The housing contains a normally closed switch with a transverse...
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3649962 |
VEHICLE ALARM SYSTEM
The invention provides a protective alarm system for a vehicle by sounding an alarm when the vehicle is tampered with or entered during the owner's absence. A first set of switches, including an...
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3646289 |
DEVICE RESPONSIVE TO MOTION AND TAMPERING
A device to be mounted on a fence, or other structure, and adapted to switch a circuit, such as an alarm circuit, in response to excessive motion of the fence and/or in response to tampering with...
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3641492 |
VEHICLE ANTITHEFT DEVICE UTILIZING CIGARETTE LIGHTER AS TIMER
A vehicle antitheft accessory readily connectable in circuit with the vehicle electrical system for the horn, running lights and the customary cigarette lighter, and utilizing the latter as a timer...
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3634844 |
TAMPERPROOF ALARM CONSTRUCTION
A vibration responsive transducer, in the form of an always-closed leaf contact switch, provides a variable resistor for triggering a latching switch to enable an alarm device. If the transducer is...
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3548373 |
THEFT PREVENTING SYSTEM FOR VEHICLES
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3422398 |
VEHICLE SOLID STATE ALARM SYSTEM
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3329935 |
Vehicle theft alarm
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3197734 |
Burglar and personal protection alarm for vehicles
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3160868 |
Theft alarm for motor vehicles
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3049700 |
Vibration responsive burglar alarm apparatus
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2984820 |
Burglar alarm for automobiles
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2947830 |
Vehicle alarm switch
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2885504 |
Automobile theft alarm
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3566350 |
Title is not available
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3562706 |
Title is not available
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