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| Number | Title | Issue Date |
| 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 conduction terminal is provided with a dual-metal complex reed, and an... | 04/07/2009 |
| 7283058 | Tree smoke detection system and method of using same A tree smoke detection system and method which includes a conically shaped smoke collector housing having an interior wall extending between a wide entrance mouth opening and a narrow exit vent opening and a smoke detection device mounted to the interior wall to pos... | 10/16/2007 |
| 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 connection strips each made of a first metal composition having a first m... | 08/07/2007 |
| 7250870 | Back draft alarm assembly for combustion heating device A back drafting alarm assembly is designed to detect back drafting in combustion fired appliances. The assembly includes a temperature sensor unit that is attached to the diverter bonnet of a water heater or furnace to measure the temperature at all times. The senso... | 07/31/2007 |
| 7242148 | Continuous current control circuit modules of series string bulbs type (II) The invention relates to a continuous current control circuit module of series string bulbs type (II), which can maintain the normal current and voltage across each of the bulbs when any of series connected bulbs burn out. The string includes a shunt in every bulb a... | 07/10/2007 |
| 7239047 | Switch device incorporating capacitive oscillator A switch (10) comprises a face plate (16) and a single switch sensing oscillator (18) responsive to a switch activating presence. The oscillator (18) has a resistive component (36) connected to a sensing plate (38) which act... | 07/03/2007 |
| 7068176 | Smoke detector with sound quality enhancement chamber A smoke detector having a sound quality enhancement chamber for increasing the sound quality of alarms produced by a sound producing device in the smoke detector. In at least one embodiment, the sound quality enhancement chamber is formed by a housing and a plate su... | 06/27/2006 |
| 7011444 | Fire sensor A fire sensor comprising a baseplate, a temperature detecting element, and a protective case. The baseplate has an outside surface which serves as a heat sensing surface which is exposed to a hot airflow generated by a fire. The temperature detecting element thermal... | 03/14/2006 |
| 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 two wires of a standard telephone line. When the measuremen... | 10/23/2001 |
| 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, membrane, diaphragm, or similar actuatable device of movin... | 09/19/2000 |
| 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 element electrically connected to the energy source. The ... | 05/30/2000 |
| 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 upper temperature limit. The heat alarm includes a microproces... | 07/27/1999 |
| 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 the temperature in the cabinet exceeds an upper temperature... | 12/08/1998 |
| 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 speaker is situated within the interior space of the hous... | 10/20/1998 |
| 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 an overheat or fire condition to provide an alarm. To pre... | 04/15/1997 |
| 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 communication with the fluid in the inflator. A temperature sensitive... | 02/18/1997 |
| 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 preferably has an auxiliary battery power supply in case o... | 10/24/1995 |
| 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 semi-annular indicator surface, with an indicator arrow o... | 04/12/1994 |
| 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 (20) and a thermoresistive element (150). According to the... | 09/17/1991 |
| 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 driving surface for sensing the prevailing temperatures and th... | 05/15/1990 |
| 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 a potential fire hazard that can be caused by creosote bu... | 04/10/1990 |
| 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 dangerously high temperature, the heat sensitive switch is... | 02/13/1990 |
| 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 flue pipe. A bimetal thermostat is mounted in close proxim... | 09/12/1989 |
| 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 temporarily disabled by the user by actuating a disable timer... | 09/05/1989 |
| 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 prevent freezing and wherein a modification is provided wh... | 01/31/1989 |
| 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 of the passage. The bimetallic strip is provided so as to r... | 03/15/1988 |
| 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 using the console as a handle and telescopes within the cons... | 10/20/1987 |
| 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 for operating an indicator to one condition thereof when ... | 09/22/1987 |
| 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 insulative arms, one extending from each end of the strip. The co... | 09/01/1987 |
| 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 contact closed upon expansion of a bimetallic coil. The coil... | 01/13/1987 |
| 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 sonic detecting-warning device (44) capable of rotating on ... | 02/18/1986 |
| 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 deployable thermally conducting mounting clip for mounting the ... | 09/10/1985 |
| 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 the fault level. The pulses are applied to a long time del... | 12/04/1984 |
| 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 being generated by the action of heat or, if generated, f... | 04/03/1984 |
| 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 form a linear strip capacitor and one of the two conducto... | 10/25/1983 |
| 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 auxiliary heating system. The switch opens and closes a circui... | 07/19/1983 |
| 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 itself is installed on a ceiling or wall where the fire can... | 06/14/1983 |
| 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 wherein at least one of the conductors is comprised of a numb... | 02/08/1983 |
| 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 temperature change and which also functions as a vibrating conta... | 04/27/1982 |
| 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 and even more so at the signal lines it is possible for th... | 03/30/1982 |
