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7515057 |
Power socket having a reed to activate an alarm
A power socket having a reed to activate an alarm is constituted by a lower casing, an upper casing, and a conduction terminal which is inserted between the lower casing and the upper casing. The...
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7253740 |
Method and apparatus for monitoring for failure temperatures of a structure
An apparatus for monitoring a temperature of a structure, comprising: one or more electrically conductive loops adapted to be affixed to the structure, each including first and second elongate...
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6307469 |
Remote detection device
The present invention provides a remote detection device including a conventional measurement device, such as a thermostat, having an internal contact which is wired in series with a resistor and...
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6121883 |
Method and device for fluid pressure analytical electronic heat and fire detection
A method for fluid pressure analytical electronic heat and fire detection, and a corresponding heat detector, used for detecting heat and fire, having no moving component, such as a valve, switch,...
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6069566 |
Device for measuring and signaling the internal temperature of a container
A device for measuring and signaling the internal temperature of a container. The device includes an energy source, an informing device electrically connected to the energy source, and a bimetallic...
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5929762 |
Electrical panel overtemperature alarm system
A heat alarm for an electric panel cabinet that mounts a temperature sensor within the enclosed area defined by the cabinet and sounds an alarm if the temperature within the cabinet exceeds an...
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5847653 |
Electric panel heat alarm with a thermally non-conductive mounting arrangement
An heat alarm for an electric panel cabinet mounts a heat sensor within the enclosed area defined by the electric panel cabinet to monitor the temperature within the cabinet and sound an alarm if...
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5825294 |
Thermostatic heat detector
A heat detection and alarm unit is provided including a housing with a front face, a rear face, a top face, a bottom face and a pair of side faces coupled therebetween defining an interior space. A...
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5621389 |
Apparatus for detecting a fire having a liquid filled sensor tube and compensation for changes in ambient temperature
A fire detection system includes an elongated liquid filled tube with a fluid coupled alarm switch, with a flexible diaphragm which senses a change from the liquid to vapor phase in the presence of...
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5604338 |
Temperature adjusting low pressure sensor
A temperature compensating low pressure sensor for verifying loss of gas from an inflator of a vehicle restraint safety system. The sensor includes a housing and a pressure diaphragm in...
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5461367 |
Electric panel fire alarm
A fire alarm for an electric panel cabinet mounts a temperature sensor to monitor the internal cabinet temperature and sound an alarm if the inside of the cabinet becomes too hot. The alarm device...
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5302028 |
Bathtub thermometer device
A thermometer housing of a generally cylindrical configuration is arranged for floating reception within a bathtub, with the thermometer housing including a top wall divided into a first and second...
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5048974 |
Temperature measuring device including an alarm contact
The present invention relates to a temperature measuring device including an alarm contact, in particular for motor vehicles, the device comprising a housing (10) which receives a bimetallic strip...
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4926163 |
Method and apparatus for advance warning signalling to a motorist of an ice condition on a driving surface
A method and apparatus for advance warning signaling to a motorist of an ice condition on a driving surface. The method steps include mounting a plurality of traffic signalling devices along a...
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4916436 |
Overheated stove pipe alarm
A warning apparatus alerts a home owner to unsafe temperatures in the stove pipe of a wood- or coal-burning stove by signaling an alarm if the pipe gets too hot, thereby providing a warning against...
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4901059 |
Overheat warning for wood stoves
A self-contained electrical warning device for attachment to a wood furnace. Includes a heat sensitive switch, a momentary test switch, a set of batteries, and an alarm. When the furnace reaches a...
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4866427 |
Temperature alarm for stoves
A temperature alarm is disclosed for attachment around the exterior of the flue pipe of a wood-burning or similar stove, with alarm activation temperature selected by slidable adjustment along the...
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4864283 |
Temperature alarm
A temperature alarm includes a thermostat for actuating an audible alarm, a control panel-mounted LED and a circuit board-mounted LED. The audible alarm, once actuated by the thermostat, can be...
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4801922 |
Low temperature alarm
An alarm device has a housing provided with visual and audio alarm indicators which give a warning when the temperature of a particular location is at a predetermined relatively low temperature to...
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4730704 |
Lubricating oil supply system for industrial engines
A lubricating oil supply system has a pump for automatically supplying lubricating oil from an oil tank to a crankcase of an engine through a passage. A bimetallic strip is cantilevered on a wall...
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4701741 |
Temperature sensing system for automatic transmissions
A console having annunciator lights and a cigar lighter receptacle compatible telescoping plug is mounted in the cigar lighter receptacle of an automobile. The plug is inserted in the receptacle...
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4695829 |
Temperature level indicating device and method of making the same
A device for indicating that a sensed temperature has reached a certain selected level and method of making the same are provided, the device comprising a housing carrying an electrical switch unit...
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4690570 |
C-shaped failure detector for steam traps
A C-shaped failure detector for steam traps includes a curved temperature sensitive bi-metal strip positionable against the external surface of a steam or condensate pipe, and two thermally...
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4636776 |
Alarm system for space heating appliances
A housing for attachment to a space heating appliance and having a terminal assembly receiving a two conductor plug. The terminal assembly is positionable arcuately on the housing and includes a...
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4571580 |
Sonic temperature warning device for lids of cooking vessels
A movable permanent magnet (38) is moved by a rotating rig (29, 30) driven by a spiral thermometer (27). This magnet is designed to activate an interrupter (43) of an electric circuit housed in a...
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4540980 |
Portable security alarm
A portable room security alarm features a smoke detector alarm, a motion sensing intrusion alarm, a temperature sensing alarm, and a digital display alarm clock. The security alarm includes a...
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4486803 |
Electronic system for high amperage circuit interruption apparatus
An electronic system for a high amperage molded case circuit breaker employing a voltage to frequency converter circuit for transforming fault current levels to a number of pulses corresponding to...
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4441034 |
Contact-controlled capacitive switching apparatus
A contact-controlled capacitive switching means utilized as a floor or cabin calling transmitter for lifts or the like is designed such that travel or drive commands for the lift are prevented from...
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4411536 |
Bi-directional temperature excursion sensing and locating apparatus
A temperature increase or excursion sensor and locator consisting of a temperature sensitive cable which includes three electrical conductors, two conductors are separated by a dielectric member to...
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4394646 |
Temperature indicator for a glass ceramic cooking surface
The temperature indicator has a temperature sensor which operates a switch. The temperature sensor is exposed to the heat of both the heating system of the glass ceramic cooking surface and an...
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4388617 |
Fire alarm device having thermal sensitivity enhancement
A fire alarm device has, in a main body, a fire detection means and alarm means controllable by a detection signal from the fire detection means. The fire alarm device, which being independent in...
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4372693 |
Temperature excursion sensing and locating apparatus
A temperature excursion sensor and locator consisting of a temperature sensitive cable which includes two electrical conductors separated by a dielectric member to form a linear strip capacitor...
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4326780 |
Portable thermo-anemometer with bimetallic sensor
An extremely sensitive portable thermo-anemometer comprises: (1) a matched pair of preformed bimetallic cantilevers which are arranged symmetrically to face and bend toward each other upon a...
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4322721 |
Self-monitoring warning installation
Conventional warning installations possess electrically interrogated feelers or sensors or generate electrical signals, particularly if they are used for remote monitoring purposes. At the feelers...
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4264892 |
Alarm device
An alarm device which includes a housing, batteries in the housing, conductors and a light source and an audio signal in parallel to one another and connected to the batteries and switch means...
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4220950 |
Air flow sensor
An air flow sensor has a hollow tubular housing partially filled with potting compound and having a printed circuit board mounted in the compound inside the tube. The board is mounted such that two...
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4136330 |
Device for monitoring the flow and temperature of a coolant
In an automobile, a device for monitoring the flow and temperature of the coolant in the internal combustion engine, comprising a switch of a supply circuit for an alarm, whose mobile part is...
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4087046 |
Test apparatus
Test apparatus is disclosed for testing a gas-fired forced air heating system having a plurality of control elements. A monitoring device includes an indicator light adjacent to the thermostat for...
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4075614 |
Christmas tree fire detector and alarm
A fire detector and alarm is provided with means to mount it on a Christmas tree so as to be activated by the rapid buildup and intense heat of a Christmas tree fire. The power may be derived from...
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4009055 |
Apparatus for producing electricity in case of fire
A method of and an apparatus for producing electricity when a fire breaks out, the apparatus comprising a normally sealed vessel of breakable material having an amount of activation electrolyte...
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4007713 |
Test circuit
A test circuit for use with a boiler control circuit. A test switch and a lamp are connected between ground and a water level electrode. In the presence of a water path, a sufficient potential drop...
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3999175 |
Fault detection indication system
A fault detection and indication system for electrically energized apparatus. The system connects to a number of sensors which actuate series switches in a power supply control circuit for the...
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3959787 |
Refrigeration alarm
An alarm for signalling an improperly high temperature in a refrigerated container such as a freezer includes a thermostat within the container and an alarm unit magnetically mounted on the outside...
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3909814 |
Detecting and control method and apparatus
A method and apparatus are provided for detecting changes in physical phenomena and for subsequently controlling response devices in accordance with such detected changes. A sensor responsive to...
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3891956 |
Apparatus for measuring variables
An apparatus for measuring two variables expresses one of the variables in terms of a first change of position, and the other variable in terms of a second change of position, derives from the...
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3872355 |
Fire detection and projection circuit and device
An early warning fire detection system utilizes a ground fault protected circuit fed through a conventional ground fault circuit interrupter (GFCI) as a vehicle for detecting elevated temperature...
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3846773 |
BATTERY OPERATED SURVEILLANCE DEVICE
A battery powered condition responsive device characterized by exceedingly low power drain and a battery condition indicator. In a preferred embodiment the device is responsive to smoke and/or heat...
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3832662 |
VEHICLE COOLING SYSTEM CONDITION MONITOR
A cooling system condition monitoring apparatus which includes a spring loaded temperature sensitive switch assembly moved by a pressure responsive diaphragm for providing a ground circuit for a...
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3810143 |
TEMPERATURE COMPENSATED FLUID SENSOR
There is described an improved apparatus for detecting the presence or absence of fluid. The apparatus comprises an electrical circuit and a sensor device electrically joined to the circuit. The...
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3786461 |
FIRE ALARM DEVICE
A fire alarm device including thermostat means operably connected to conductor means whereby a fire condition may activate the thermostat for providing a signal current to activate an alarm in...
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