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...During the Civil War, the Confederacy established its own Patent Office which issued 266 patents, a third of which concerned implements of war.
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| Number | Title | Issue Date |
| 7327278 | Method and apparatus for tracing remote ends of networking cables A method and a circuit is disclosed that facilitates identifying a remote end and optionally an intermediate location of an installed cable, such as a cable for carrying data, without the need to disconnect the cable. One or more circuits may be connected across two... | 02/05/2008 |
| 7259686 | Two wire temperature transmitter A thermoelectric connector module (C) is disclosed which comprises input (2) and output (1E) connectors and contains signal conditioning circuitry (1C). The input connectors (2) are interfaced with a hand-held detector (7), and the... | 08/21/2007 |
| 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 |
| 7241933 | System and method for assessing fluid distribution A system and method for assessing fluid distribution. According to one aspect of the disclosure, a fluid detection network is used to assess the fluid distribution of a fluid collection article having a plurality of tested regions. Each tested region of the fluid co... | 07/10/2007 |
| 7228508 | Fail-safe thermal sensor apparatus and method A fail-safe thermal sensor is implemented in an integrated circuit such as a microprocessor. The fail-safe thermal sensor monitors the temperature of the integrated circuit and halt logic halts operation of the integrated circuit in response to the fail-safe thermal... | 06/05/2007 |
| 7216064 | Method and apparatus for programmable thermal sensor for an integrated circuit A programmable thermal sensor is implemented in an integrated circuit such as a microprocessor. The programmable thermal sensor monitors the temperature of the integrated circuit, and generates an output to indicate that the temperature of the integrated circuit has... | 05/08/2007 |
| 7193522 | Apparatus and circuit for use with capacitive presence detection systems A capacitance presence sensing apparatus (10) having a fail-safe circuit (13) and modular units (100). The fail-safe circuit (13) includes delivering a low voltage (FIG. 5) to a sensor and connecting voltage through a resistor to a... | 03/20/2007 |
| 7141715 | System and method for assessing fluid distribution in a urine detection network A system and method for assessing fluid distribution. According to one aspect of the disclosure, a fluid detection network is used to assess the fluid distribution of a fluid collection article having a plurality of tested regions. Each tested region of the fluid co... | 11/28/2006 |
| 7089880 | Cooling milk in an automatic milking system Example embodiments of the present invention relate to methods and arrangements for cooling milk in a milk storage tank of an automatic milking system comprising (i) measuring an amount of extracted milk by a milk flow meter; (ii) determining a cooling need for milk... | 08/15/2006 |
| 7058525 | Battery test module A storage battery includes a battery housing and a plurality of electrochemical cells in the battery housing electrically connected in series to a positive terminal of the battery and a negative terminal of the battery. A first connection is coupled to the positive ... | 06/06/2006 |
| 7039533 | Battery test module A storage battery includes a battery housing and a plurality of electrochemical cells in the battery housing electrically connected to terminals of the battery. A battery test module is mounted to the battery housing and electrically coupled to the terminals through... | 05/02/2006 |
| 7012535 | Battery operated warning sensor An alarm device for signaling when an object reaches a specified condition. The alarm device includes a sensor for detecting the condition of the object. The device further includes a switch element which is closed when the sensor indicates the specified condition. ... | 03/14/2006 |
| 6985080 | Flame sense circuit and method with analog output An analog flame sense circuit is provided that utilizes the flame rectification method of sensing flame. The circuit uses an AC voltage source and discrete components to provide the sensing of the flame current. Either a single-pole or a two-pole filter may be used ... | 01/10/2006 |
| 6975047 | Temperature-based cooling device controller apparatus and method A temperature-based cooling device controller is implemented in an integrated circuit such as a microprocessor. The temperature-based cooling device controller includes a register to store a threshold temperature value, a thermal sensor, and clock adjustment logic t... | 12/13/2005 |
| 6937087 | Temperature sensor and method for detecting trip temperature of a temperature sensor A comparator circuit of a temperature sensor includes an output node and a variable current node. The output node is a first voltage at a given temperature when a current at the variable current node is less than a threshold current, and a different second voltage a... | 08/30/2005 |
| 6466132 | Incipient failure indication apparatus for an environment control system An incipient failure indication apparatus for an environmental control system which includes a heat exchanger through which air flows and a temperature control thermostat. The indication apparatus includes an indicator having an alarm in communication wit... | 10/15/2002 |
| 6384731 | System for detecting a fire event A fire event detection system includes a programmable logic circuit which evaluates electrical resistance input data and energizes an alarm upon programmed conditions. The system includes a temperature sensitive polymeric tape spanning between a pair of c... | 05/07/2002 |
| 6225907 | Environmental control system incipient failure indicator apparatus An incipient failure indication apparatus for an environmental control system which includes a heat exchanger through which air flows and a temperature control thermostat. The indication apparatus includes an indicator having an alarm in communication wit... | 05/01/2001 |
| 6124793 | Temperature monitoring and calibration system for control of a heated CVD chuck A system coupleable to a heated wafer chuck control system provides an indication that the heated chuck is operating at a temperature outside of a desired operational range. An operational temperature circuit generates an operational temperature limit sig... | 09/26/2000 |
| 6014082 | Temperature monitoring and calibration system for control of a heated CVD chuck A system coupleable to a heated wafer chuck control system provides an indication that the heated wafer chuck is operating at a temperature outside of a desired operational temperature range for the chuck. The system comprises: an operational temperature ... | 01/11/2000 |
| 5877690 | Bayonet lock construction for a chip detector A chip detector assembly includes a body member with a cylindrical passage for receipt of a chip detector. The chip detector includes a triangular flange which cooperates with a congruent triangular window in the housing to permit the chip detector to eng... | 03/02/1999 |
| 5808562 | Vehicle detector for installation on the surface of a multi-lane road A vehicle detector for installation on the surface of a multi-lane road, comprising at least a coaxial detector cable provided with a central conductor, a metallic cladding and a filler material between the cladding and the conductor. The coaxial detector... | 09/15/1998 |
| 5793293 | Temperature sensing system for over-heat detection A temperature sensing system for over-heat detection includes a temperature sensing cable, interface unit and termination unit. The interface unit is configured to issue interrogation, communication and power signals to the termination unit through the te... | 08/11/1998 |
| 5684463 | Electronic refrigeration and air conditioner monitor and alarm An electronic refrigeration and air conditioner monitor and alarm system monitors air conditioning and refrigeration systems for inefficiencies that waste energy. The device monitors and analyzes the temperatures of the suction line of such systems for va... | 11/04/1997 |
| 5600306 | Receptacle unit and extension cord An electrical receptacle unit includes at least one receptacle body (3) internally provided with a pair of slotted terminals (4) for insertion of a pair of blades (L) of a load-side electrical plug (P), a thermistor (7) encased in a protective tube (9) ou... | 02/04/1997 |
| 5485140 | Vehicle obstacle detector and alarm system An improved vehicle obstacle detector and alarm system (10) consisting of an obstacle detector assembly (12) and an electronic control unit (40). The assembly (12) includes an impact probe (14) that is attached through a flexible rod (16) to the front end... | 01/16/1996 |
| 5450066 | Fire alarm heat detector An electronic heat detector provides a fire alarm with a rapid rate of rise of temperature. The rate of rise indication is obtained from a comparison of outputs from a first temperature sensor which responds rapidly to environmental temperature, reference... | 09/12/1995 |
| 5446444 | Capacitive threshold detector test circuit A test circuit for testing operation of a liquid level detector. The liquid level detector includes a probe that is placed at a test site. A control circuit monitors changes in capacitance of the probe due to changes in the liquid level at the test site. ... | 08/29/1995 |
| 5412374 | Method and apparatus for detecting and indicating the location of a high temperature zone along the length of a fire detecting cable A method and related apparatus for sensing and indicating the location of a "hot spot" along a temperature sensing cable utilizes a linear stable voltage feedback loop circuit for maintaining a predetermined magnitude DC voltage across one conductor of a ... | 05/02/1995 |
| 5293152 | Vehicle ostacle detector and alarm system A vehicle obstacle detector (10) that is designed to alert the driver of a motor vehicle that the vehicle has encountered an obstacle. The detector (10) consists of an obstacle detector assembly (12) that includes a front probe (14) having a cavity (14b) ... | 03/08/1994 |
| 5185594 | Temperature sensing cable device and method of making same A continuous temperature sensing cable formed of a polymer containing conductive and semi-conductive fillers such as polyethylene with carbon black, powdered metals and metal oxides controlled within the range of from about eight percent (8%) to about fif... | 02/09/1993 |
| 5172099 | Self monitoring fire detection system Disclosed is a fire detection and engine monitoring system of the type which utilizes a pair of elongated thermistor strands extending over substantially the same path to provide redundancy. A resistance of the two thermistor strands are sensed and a resi... | 12/15/1992 |
| 5150102 | Machining fluid temperature deviation alarm A machining fluid temperature deviation alarm device is attached to an electrical discharge machining device which, having a temperature sensor (S1) for machining fluid temperature detection and a cooler (2) for machining fluid cooling, controls the coole... | 09/22/1992 |
| 5072211 | Safe alarm system An alarm system to be used with safes is disclosed. A housing is provided adapted to be mounted to the exterior of a safe, particularly a personal home or business safe. A heat sensor is mounted to a shaft that extends from the housing into the safe. The ... | 12/10/1991 |
| 5032823 | Secure personnel monitoring system A personnel monitoring system includes a tag worn by each monitored person. The tag repeatedly emits digital radio signals, and a predetermined bit in the signal changes with time according to a predetermined pattern. Monitoring apparatus detects the radi... | 07/16/1991 |
| 5025248 | Automatic temperature monitoring system An automatic temperature monitoring system comprised of a central control circuit and one or more processing circuits connected thereto. Each processing circuit(s) has one or more remote temperature sensing probes connected to remote refrigerating equipme... | 06/18/1991 |
| 4994792 | Fluid temperature monitoring system A fluid temperature monitoring system is characterized by an adjustable variable voltage divider for selecting a desired temperature range, a temperature detector for detecting whether the fluid temperature is above, below, or at the desired range, and a ... | 02/19/1991 |
| 4878043 | Device for indicating hydroculture-related values A device for indicating values which are of interest in hydroculture applications is characterized in that the device includes a tube open at one end thereof and attached to a vessel at another end thereof. A probe including a sensor is disposed proximate... | 10/31/1989 |
| 4859989 | Security system and signal carrying member thereof A security system comprising a signal-carrying member and a detector for detecting a change in the resistance of the conductive path surrounding a core of the signal-carrying member. The conductive path comprises inner and outer layers of semi-conductive ... | 08/22/1989 |
