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Magician Harry Houdini patented a "Diver's Suit" enabling the wearer to "quickly divest himself of the suit while being submerged and to safely escape and reach the surface of the water."
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| Number | Title | Issue Date |
| 7497386 | Apparatus and methods for operating a gas valve An apparatus for operating a gas valve in a gas-fired heating system includes a solenoid having a pick coil and a hold coil connected to the pick coil and to a thermo-generator. A power supply powers the pick coil to open the gas valve. The thermo-generator powers t... | 03/03/2009 |
| 7240851 | Thermostat fan and boiler timer A programmable timer circuit that can be connected directly to the fan switch of any thermostat with a forced air heating and/or cooling system that includes a blower fan for circulating air throughout the home. A programmable timer circuit that can be connected dir... | 07/10/2007 |
| 6881055 | Temperature controlled burner apparatus A system for controlling temperature in an enclosure operates in a low heat or a high heat mode with flame always present. The presently intended use is for providing a cooking grill with a controlled temperature cooking space. An electrically controlled valve havin... | 04/19/2005 |
| 6754541 | Control system apparatus for loading a value of a system parameter and preventing change thereto after a period of time A control system for controlling an operating system stores a system parameter such as an ultimate pressure value, for an operating system. The control system allows operation of the operating system only after an initial value of the system parameter has been loade... | 06/22/2004 |
| 6064310 | Security system with HVAC fault reporting The performance of an HVAC system in a building is monitored by connecting a thermostat to an alarm system which is equipped to provide notification of alarm conditions through telecommunication or other direct means to some responsible entity. The alarm ... | 05/16/2000 |
| 5656493 | System for automated performance of the polymerase chain reaction There is disclosed herein a machine for performing nucleic acid amplification under computer control. The machine utilizes any one of a number of heating and cooling systems under control of a host computer which directs the heating and cooling systems to... | 08/12/1997 |
| 4583936 | Frequency modulated burner system A furnace (A) defines a combustion chamber (10) in which a pair of burners (B) are mounted for oxidizing the fuel to heat the combustion chamber. An air blower (12) supplies air to the burners at a rate controlled by a rate control valve (18). A frequency... | 04/22/1986 |
| 4521183 | Cooking appliance A cooking appliance using a gas fuel as a heat source and having an appliance body includes comprising a temperature sensor installed in a heating chamber, a control circuit adapted to be actuated by the output from the temperature sensor and to operate a... | 06/04/1985 |
| 4461616 | Ceramic heat treatment regulating apparatus and method An efficient method for using a periodic kiln to heat ceramic material to a state of maturation, and the apparatus for carrying out the method, duplicate the action of pyrometric cones. In a microcomputer, data is stored describing the relationship betwee... | 07/24/1984 |
| 4425930 | Fluid flow control apparatus and method Apparatus and a method for controlling the flow of a fluid to a fluid-actuated system. The system is controlled by a sensor which senses a variable characteristic of the system, such as the air temperature. The apparatus includes a pair of solenoid valves... | 01/17/1984 |
| 4234124 | Control system for gas kiln A timing mechanism to control the sequential progressive opening of a valve in a gas line leading to a gas fired kiln with the sequential progressive openings taking place at predetermined time intervals until the object being heated in the kiln has matur... | 11/18/1980 |
| 4172555 | Adaptive electronic thermostat A thermostatic controller system for a building heating and/or cooling system (furnace) includes a stored program of desired temperatures which are to be attained within the building at predetermined times within a repetitive time cycle, such as a day. Di... | 10/30/1979 |
| 4142376 | Control for cryogenic freezing tunnel A startup and shutdown control for a cryogenic freezing tunnel for freezing food products in which the rate of flow of cryogen into the tunnel is normally regulated by a thermal regulator, including an auxiliary flow regulator for maintaining a predetermi... | 03/06/1979 |
| 4114024 | Feedback-controlled radiant furnace for firing ceramic material and the like A radiant furnace for firing ceramic material provides for accurate control over the rate of increase of the ceramic material temperature during a firing operation. Heat is radiated in the furnace from an electrically controlled heater. A first programmin... | 09/12/1978 |
| 4003803 | Control system for preventing an excessive temperature rise in a battery of coke ovens The control system includes a controller and a clocking circuit along with a computer for each one of the coke oven chambers. A first control signal is responsive to the occurrence of charging coal into a given oven chamber and starts the clock. A second ... | 01/18/1977 |
| 4001557 | Stored program digital process controller A digital process control function generator wherein a timing clock, in conjunction with programmable read only memories controls variables in a process with respect to time.... | 01/04/1977 |
| 3985712 | Method and apparatus for preparing intermediate polyester resin A programmed method for the preparation of an intermediate polyester resin is disclosed. The process is monitored and controlled by a supervisory on line computer which supervises the three phases of the process: the charging phase; the temperature elevat... | 10/12/1976 |
