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4314240 |
Device for locating persons
An apparatus for locating a person covered by snow or the like comprising a portable housing adapted for being carried by a person and including a radio transmitter and a device for optically...
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4300130 |
Anti-theft alarm circuit and compatible warning plugs
An anti-theft alarm circuit and compatible warning plugs; the warning plugs are designed to look to be an integral part of the stereo component or appliance to which they are attached. When the...
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4291301 |
Reminder alarm system for preventing mislaying of personal articles
Reminders applied to pocketable personal accompanyings such as lighters, pens, ballpens, or pocket calculators, etc. By equipping such objects with mercury-switch-triggered ultramicro buzzers on...
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4284983 |
Appliance anti-theft and protection circuitry
New and unique circuitry suitable for being located in electrical appliances, and which protects such appliances from theft and unauthorized movement. More particularly, the invention discloses...
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4279433 |
Emergency locator beacon for skis
A beacon device locates ski equipment such as skis and ski poles which has been separated from a skier. The device includes a signaling device such as a strobe light mounted in or to the equipment...
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4275391 |
Key controlled, position sensitive, portable alarm
A portable alarm device senses movement of the device and actuates an alarm. A pendulum with attached magnet, set in motion by movement of the device, causes closing of alarm circuit reed switches...
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4274077 |
Vehicle cover and alarm system therefor
A vehicle protective cover and alarm system therefor wherein the cover is of a design and configuration to at least enshroud the major body portion of the vehicle, and wherein at least two sensors...
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4272763 |
Security attache case with automatic alarm system
An attache case with automatic alarm system has a pair of mirco switches mounted in the handle thereof. If the micro switches are actutated, the edges of the attache case will produce a high...
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4267553 |
Method and apparatus for securing attache cases
An attache case is secured against unauthorized handling by providing an alarm and at least one sensor capable of sensing at least two conditions relative to the forces on said attache case. One of...
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4246573 |
Protection system for electronic gear
A system for use in combination with (for electrical attachment to) electronic gear having an audio amplifier and which includes alarm means for generating a theft signal which is broadcast through...
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4237450 |
Appliance theft alarm
An appliance theft alarm for mounting on or inside an electrical appliance which, when the electrical plug connecting the appliance with a wall electrical outlet is removed, will sound an audible...
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4211995 |
Alarm and locking device to prevent theft of an article
A self contained alarm device is disclosed for aiding in the prevention of the theft of articles from an automobile, such as a citizens band radio, by sounding an audible alarm in the event of an...
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4204202 |
Security attache case with automatic alarm system
An attache case with a built-in alarm circuit does not differ in external appearance from a conventional attache case. It has a handle fastened to the body by two sets of metal studs and two locks....
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4196429 |
Motion detector
An array of interdigitally related elements are interstitially spaced from one another, with alternate elements in the array connected to a first conductor and the remaining elements in the array...
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4190828 |
Movement sensitive anti-theft alarm
The trigger mechanism is an electronic switch comprised of an LED and a photosensitive transistor. The active surfaces of the LED and photosensitive transistor are normally aligned, the LED being...
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4188622 |
Garbage can alarm
A strap assembly constructed of shape retentive but deformable and resilient dielectric material. The strap assembly includes longitudinally spaced transversely extending corrugations and is...
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4167733 |
Tamper-proof security alarm system
A tamper-proof security alarm system comprising basically a radio transmitter unit to be located at equipment which is to be protected, and a radio receiver unit with alarm and control circuits...
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4155079 |
Theft-proof suitcase
Removal of a suitcase from the owner's hand causes a plug to be separated from a jack to supply power to an alarm circuit which provides audible and visible alarms. Alternatively, the alarm circuit...
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4117468 |
Sound alarm for protecting briefcases and the like
A sonorous alarm system to be placed in briefcases and small valises will permit the person who uses the same to have an opportune warning in the case that someone non-authorized tries to carry...
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4103289 |
Calculator theft prevention device
A security device for an electronic calculator consists of an electronic circuit within the calculator which permits operation of the calculator only after the operator has correctly operated a...
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4092641 |
Security interlock switch system for smoke detectors and the like
Attempts to pilfer or tamper with condition detector structures such as smoke detectors, intrusion detectors or the like are discouraged by incorporating switch apparatus within the enclosure for...
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4090183 |
Billfold anti-theft device
A housing contains a battery-operated alarm and a spring clip to hold a billfold to the housing. A plate is removably attached to the housing and functions to hold open a switch in the alarm's...
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4063229 |
Article surveillance
Sensor-emitter labels or tags containing a two-terminal nonlinear capacitor, e.g., a semiconductor diode, directly connected to antenna means are applied to articles for purpose of surveillance. A...
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4057791 |
Motion responsive alarm system
The alarm system, which may be fastened to an object whose movement is to be monitored, includes a unique sensor array providing no output in any static orientation and a pulsating output in...
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4037223 |
Audible alarm system for an electrical outlet
An audible alarm system for an electrical outlet including a housing dimensioned to prevent access to the socket of an electrical outlet upon insertion therein, means coupled to the housing for...
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4030087 |
Anti-theft alarm system
An anti-theft alarm system is provided for detecting a desired disturbance to an associated structure wherein a momentary disturbance of the structure causes the alarm to emit a short audible...
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4023157 |
Theft alarm for portable articles
A theft alarm for portable articles includes a pocket-sized housing from which extend a pair of opposed, pivotting jaws. One of the jaws is secured to an extendable ratchet shaft disposed within...
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4013995 |
Vehicle burglar alarm
A vibration sensitive intrusion alarm system for protecting the vehicle against theft and as a self-contained portable vibration sensitive alarm system.
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3938126 |
Handbag alarm system
A battery in a handbag is electrically connected to an audible alarm in the handbag for energizing the alarm to produce an audible signal. A short-circuiting electrical conductor is electrically...
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3930249 |
Self actuating wallet alarm
A wallet or the like having incorporated therewith an electronic circuit capable of emitting an audible alarm when the same is removed from an owner's purse or pocket.
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3914756 |
Portable alarm actuated by attempted theft
A battery powered solid state device sounds an alarm when energized. The device has a normally open microswitch and two terminals. The device is armed when the switch is closed and the terminals...
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3893096 |
Handbag alarm system
A handbag alarm system for handbags which are closed by a clasp, including an alarm electrically coupled to a direct current source, an on-off deactivating switch, and a pressure responsive switch...
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3866205 |
LOCKING DEVICE WITH ALARM UTILIZING FLEXIBLE GAS IMPERMEABLE TUBE
There is disclosed a locking apparatus having an alarm for detecting the tampering with of a portion of the locking apparatus. The locking apparatus comprises a housing having a gas impermeable...
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3851326 |
PURSE ALARM
An alarm device is provided to inhibit purse snatching. A battery-operated sound emitting device is provided for placement in the purse and secured thereto as by a pin. A flexible cord is connected...
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3836901 |
MOTION-SENSITIVE ALARM WITH LINE-CORD-RESPONSIVE AUTOMATIC ARMING MEANS
A circuit and apparatus adapted to be mounted entirely or in part within the device to be protected includes an alarm circuit loop and a control loop, with the state of the control loop being...
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3832705 |
ALARM DEVICE
A personal security device that is readily carried by hand and that includes an alarm activating unit that can be preset and restrained by a finger so that when released the activating unit...
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3824540 |
BICYCLE LOCK AND ALARM APPARATUS
A bicycle lock and alarm apparatus for use as a preventive or deterrent device in controlling bicycle thievery. A continuous cable adapted to extend through the bicycle wheels and also about the...
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3815118 |
HANDBAG WITH A THEFT ALARM AND PROTECTION DEVICE
A handbag is combined with an alarm that is connected to an elastic member, fitted over the wrist of the hand grasping the handbag. The elastic member has sufficient strength that it does not break...
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3815117 |
ALARM APPARATUS FOR OFFICE EQUIPMENT
This invention is concerned with an alarm apparatus constructed in an enclosed housing and having attachment means for quick connection to a piece of office equipment. The alarm housing is made up...
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3781860 |
METHOD AND APPARATUS FOR INHIBITING ARTICLE THEFT
A system for detecting article theft wherein different frequency signals are transmitted at the access paths and a receiver associated with the article is responsive to the transmitted signals to...
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3781861 |
ALARM LOCK
An alarm and locking device is provided wherein a housing containing an electrical alarm circuit is constructed for attachment to the body of an easily movable object, such as a bicycle. An object...
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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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3729602 |
TILT RESPONSIVE SWITCH WITH BALL CONTACT ACTUATING STRUCTURE
A pair of hollow concentrically arranged containers having conductive inner surfaces separated by electrical insulating material and having a small conductive ball positioned in a hole in the inner...
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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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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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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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3701140 |
PURSE THEFT ALARM
An audible alarm constituting a part of a lady's purse and so consttucted that a sudden pull or jerking force exerted on the purse handle will cause the alarm to be actuated. The alarm unit is so...
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3685037 |
ALARM SYSTEM FOR BUSINESS MACHINES
An alarm system for protecting business machines and the like against theft, which includes a casing for location on a base support such as a desk or the like, for containing the components of the...
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3678455 |
CYCLE THEFT ALARM
An alarm device wherein the horn button, normally found on motorcycles, is by-passed with a lock switch. A lead of a battery is joined to a kickstand switch and to the horn, so that when the...
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