Patents by Inventor Daniel L. Fowler
Daniel L. Fowler has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 5324918Abstract: A temperature regulating control unit and method of making the same are provided, the unit comprising a RTD temperature sensor, a unit for applying electrical signals to the sensor, and a microcomputer for receiving digital signals from the sensor in relation to the temperature being sensed by the sensor, the unit for applying electrical signals to the sensor applying a varying voltage to the sensor.Type: GrantFiled: May 1, 1992Date of Patent: June 28, 1994Assignee: Robertshaw Controls CompanyInventors: Brian J. Kadwell, Daniel L. Fowler, Gregory F. Gawron
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Patent number: 5285053Abstract: A control system and methods of making and operating the control system are provided, the system comprising an RTD temperature sensor, an applying unit operatively interconnected to the sensor for applying a varying voltage across the sensor and thereby providing a certain current level through the sensor for each certain voltage value being applied across the sensor while the sensor is sensing a certain temperature, and a microcomputer operatively interconnected to the sensor and the applying unit for determining from the voltage being applied across the sensor the actual temperature being sensed by the sensor, the applying unit comprising a charge pump arrangement.Type: GrantFiled: December 30, 1991Date of Patent: February 8, 1994Assignee: Robertshaw Controls CompanyInventor: Daniel L. Fowler
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Patent number: 5224014Abstract: A control device and system for an appliance and methods of making the same are provided, the control device having a control unit to energize the coil of a relay with a power source at substantially a desired lead point on the voltage wave cycle thereof so as to tend to cause the contacts of the relay to subsequently close substantially at a certain point on the voltage wave cycle each time a load is to be interconnected to the power source whereby a lag time period exists between the desired lead point and a certain point, the control unit having a sensing unit to sense the lag time by detecting when the coil current of the relay coil decreases momentarily by the contacts initially closing during that particular cycle of operation of the control device, the control unit having a unit to automatically adjust the desired lead point should the sensed lag time on a certain previous cycle of operation not cause the contacts to close substantially at the certain point in order to tend to cause the contacts to cloType: GrantFiled: May 5, 1992Date of Patent: June 29, 1993Assignee: Robertshaw Controls CompanyInventors: Daniel L. Fowler, John M. Douglass
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Patent number: 5218509Abstract: An electrically operated control device and system for an appliance and method of operating the same are provided, the system comprising a power source of alternating electrical current that has a repeating voltage wave cycle and a repeating current wave cycle, a load for using the electrical current to provide an output of the load for the appliance, a relay having normally open contacts and a coil for closing the contacts only when the coil is energized, an electrical circuit for interconnecting the power source to the load through the contacts only when the contacts are closed, and a control unit for causing the coil to close the contacts substantially at a certain point on the voltage wave cycle each time the relay coil closes the contacts from the open condition thereof whereby the current flow through the contacts at each closing thereof is at substantially a desired level thereof.Type: GrantFiled: November 15, 1991Date of Patent: June 8, 1993Assignee: Robertshaw Controls CompanyInventor: Daniel L. Fowler
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Patent number: 5138514Abstract: A control device and system for an appliance and methods of making the same are provided, the control device having a control unit to energize the coil of a relay with a power source at substantially a desired lead point on the voltage wave cycle thereof so as to tend to cause the contacts of the relay to subsequently close substantially at a certain point on the voltage wave cycle each time a load is to be interconnected to the power source whereby a lag time period exists between the desired lead point and a certain point, the control unit having a sensing unit to sense the lag time by detecting when the coil current of the relay coil decreases momentarily by the contacts initially closing during that particular cycle of operation of the control device, the control unit having a unit to automatically adjust the desired lead point should the sensed lag time on a certain previous cycle of operation not cause the contacts to close substantially at the certain point in order to tend to cause the contacts to cloType: GrantFiled: June 29, 1990Date of Patent: August 11, 1992Assignee: Robertshaw Controls CompanyInventors: Daniel L. Fowler, John M. Douglass
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Patent number: 5128661Abstract: A solid state rotary entry control system for controlling appliances such as microwave ovens, dishwashers, washing machines, television sets and other appliances, the control system incorporating a first rotary entry means utilizing the angular displacement of a rotary switch to increment and decrement data, such as desired time, temperature or other data into a microprocessor based appliance control, the control system also incorporating a second rotary entry means for selecting, for example, a desired power level, such as a desired microwave oven magnetron power level, and also providing a power level bar graph display indicative of the power level selected by the user thereof.Type: GrantFiled: August 16, 1990Date of Patent: July 7, 1992Assignee: Robertshaw Controls CompanyInventor: Daniel L. Fowler
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Patent number: 5126537Abstract: A temperature regulating control unit and method of making the same are provided, the unit comprising a RTD temperature sensor, a unit for applying electrical signals to the sensor, and a microcomputer for receiving digital signals from the sensor in relation to the temperature being sensed by the sensor, the unit for applying electrical signals to the sensor applying a varying voltage to the sensor.Type: GrantFiled: December 4, 1990Date of Patent: June 30, 1992Assignee: Robertshaw Controls CompanyInventors: Brian J. Kadwell, Daniel L. Fowler, Gregory F. Gawron
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Patent number: 5111027Abstract: A control system and methods of making and operating the control system are provided, the system comprising an RTD temperature sensor, an applying unit operatively interconnected to the sensor for applying a varying voltage across the sensor and thereby providing a certain current level through the sensor for each certain voltage value being applied across the sensor while the sensor is sensing a certain temperature, and a microcomputer operatively interconnected to the sensor and the applying unit for determining from the voltage being applied across the sensor the actual temperature being sensed by the sensor, the applying unit comprising a charge pump arrangement.Type: GrantFiled: November 20, 1990Date of Patent: May 5, 1992Assignee: Robertshaw Controls CompanyInventor: Daniel L. Fowler
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Patent number: 5029244Abstract: A control system and methods of making and operating the control system are provided, the system comprising an RTD temperature sensor, an applying unit operatively interconnected to the sensor for applying a varying voltage across the sensor and thereby providing a certain current level through the sensor for each certain voltage value being applied across the sensor while the sensor is sensing a certain temperature, and a microcomputer operatively interconnected to the sensor and the applying unit for determining from the voltage being applied across the sensor the actual temperature being sensed by the sensor, the applying unit comprising a charge pump arrangement.Type: GrantFiled: July 6, 1989Date of Patent: July 2, 1991Assignee: Robertshaw Controls CompanyInventor: Daniel L. Fowler
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Patent number: 5015827Abstract: A control system and method of operating the control system are provided, the system having a supervisory circuit for detecting failure of the system and disabling a high energy control circuit of the system, the supervisory circuit having a capacitor therein for sustaining an on condition of a supervisory transistor that is in series with an output relay driver transistor of the high energy control circuit, and a temperature sensing unit that is disposed intermediate a microcomputer of the system and the supervisory circuit for continuing the charging of the capacitor only as long as the temperature sensing unit is sensing an output temperature effect of a heating unit of the system that is below a predetermined high temperature limit for the system and that terminates the charging of the capacitor when the sensed temperature is above the predetermined high temperature limit.Type: GrantFiled: February 22, 1990Date of Patent: May 14, 1991Assignee: Robertshaw Controls CompanyInventors: Brian J. Kadwell, Daniel L. Fowler
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Patent number: 4994653Abstract: A temperature regulating control unit and method of making the same are provided, the unit comprising a RTD temperature sensor, a unit for applying electrical signals to the sensor, and a microcomputer for receiving digital signals from the sensor in relation to the temperature being sensed by the sensor, the unit for applying electrical signals to the sensor applying a varying voltage to the sensor.Type: GrantFiled: November 30, 1989Date of Patent: February 19, 1991Assignee: Robertshaw Controls CompanyInventors: Brian J. Kadwell, Daniel L. Fowler, Gregory F. Gawron
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Patent number: 4935607Abstract: A temperature regulating control unit and method of making the same are provided, the unit comprising a RTD temperature sensor, a unit for applying electrical signals to the sensor, and a microcomputer for receiving digital signals from the sensor in relation to the temperature being sensed by the sensor, the unit for applying electrical signals to the sensor applying a varying voltage to the sensor.Type: GrantFiled: December 16, 1988Date of Patent: June 19, 1990Assignee: Robertshaw Controls CompanyInventors: Brian J. Kadwell, Daniel L. Fowler, Gregory F. Gawron
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Patent number: 4921713Abstract: A straw assembly for imparting flavor to otherwise neutral liquids such as milk or water includes a first section of straw for immersion in the neutral liquid and a second section of straw for placing in the user's mouth. Intermediate the two sections of straw is a chamber, which may be an intermediate section of the straw, for containing flavor imparting material, with the surface area of the flavor imparting material having an area greater than the chamber within which it is enclosed.Type: GrantFiled: June 5, 1987Date of Patent: May 1, 1990Inventor: Daniel L. Fowler
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Patent number: 4922081Abstract: A control system and method of operating the control system are provided, the system having a supervisory circuit for detecting failure of the system and disabling a high energy control circuit of the system, the supervisory circuit having a capacitor therein for sustaining an on condition of a supervisory transistor that is in series with an output relay driver transistor of the high energy control circuit, and a temperature sensing unit that is disposed intermediate a microcomputer of the system and the supervisory circuit for continuing the charging of the capacitor only as long as the temperature sensing unit is sensing an output temperature effect of a heating unit of the system that is below a predetermined high temperature limit for the system and that terminates the charging of the capacitor when the sensed temperature is above the predetermined high temperature limit.Type: GrantFiled: September 23, 1988Date of Patent: May 1, 1990Assignee: RobertShaw Controls CompanyInventors: Brian J. Kadwell, Daniel L. Fowler
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Patent number: 4899034Abstract: A temperature regulating control unit and method of making the same are provided, the unit comprising a RTD temperature sensor, a unit for applying electrical signals to the sensor, and a microcomputer for receiving digital signals from the sensor in relation to the temperature being sensed by the sensor, the unit for applying electrical signals to the sensor applying a varying voltage to the sensor.Type: GrantFiled: October 18, 1988Date of Patent: February 6, 1990Assignee: Robertshaw Controls CompanyInventors: Brian J. Kadwell, Daniel L. Fowler, Gregory F. Gawron
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Patent number: 4849595Abstract: An electrically operated control device and system for a microwave oven and method of making the same are provided, the device comprising a microprocessor for operating the power unit of the oven at various selected levels thereof, and a selector unit electrically interconnected to the microprocessor for selecting the desired power level that the microprocessor is to operate the power unit, the selector unit comprising a rotary switch that is electrically interconnected to the microprocessor in such a manner that the selector unit has a set sequence of the selection levels as the selector unit is rotated in one direction from a beginning position thereof to an ending position thereof, the beginning position being the position where the selector unit has last set for a previously desired power level setting of the microprocessor.Type: GrantFiled: April 22, 1988Date of Patent: July 18, 1989Assignee: Robertshaw Controls CompanyInventor: Daniel L. Fowler
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Patent number: 4829161Abstract: A temperature regulating control unit and method of making the same are provided, the unit comprising a RTD temperature sensor, a unit for applying electrical signals to the sensor, and a microcomputer for receiving digital signals from the sensor in relation to the temperature being sensed by the sensor, the unit for applying electrical signals to the sensor applying a varying voltage to the sensor.Type: GrantFiled: January 26, 1988Date of Patent: May 9, 1989Assignee: Robertshaw Controls CompanyInventors: Brian J. Kadwell, Daniel L. Fowler, Gregory F. Gawron
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Patent number: 4782215Abstract: A temperature regulating control unit and method of making the same are provided, the unit comprising a RTD temperature sensor, a unit for applying electrical signals to the sensor, and a microcomputer for receiving digital signals from the sensor in relation to the temperature being sensed by the sensor, the unit for applying electrical signals to the sensor applying a varying voltage to the sensor.Type: GrantFiled: December 10, 1986Date of Patent: November 1, 1988Assignee: Robertshaw Controls CompanyInventors: Brian J. Kadwell, Daniel L. Fowler, Gregory F. Gawron
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Patent number: 4777483Abstract: A solid state rotary entry control system for controlling appliances such as microwave ovens, dishwashers, washing machines, television sets and other appliances, the control system incorporating a first rotary entry means utilizing the angular displacement of a rotary switch to increment and decrement data, such as desired time, temperature or other data into a microprocessor based appliance control, the control system also incorporating a second rotary entry means for selecting, for example, a desired power level, such as a desired microwave oven magnetron power level, and also providing a power level bar graph display indicative of the power level selected by the user thereof.Type: GrantFiled: December 20, 1985Date of Patent: October 11, 1988Assignee: Robertshaw Controls CompanyInventor: Daniel L. Fowler
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Patent number: 4755646Abstract: An electrically operated control device and system for a microwave oven are provided, the device comprising a microprocessor for operating the power unit of the oven at various selected power levels thereof, a first selector unit electrically interconnnected to the microprocessor for selecting a desired power level that the microprocessor is to operate the power unit, and a second selector unit electrically interconnected to the microprocessor for selecting a desired time period that the microprocessor is to operate the power unit at the desired power level thereof, the first and second selector unit each comprising a rotary switch unit that is electrically interconnected to the microprocessor in such a manner that the respective rotary switch unit always selects the same set sequence of said selection settings for the microprocessor as said respective rotary switch unit is rotated in one direction from a beginning position thereof that selects a first selection of the sequence to an ending position thereof tType: GrantFiled: July 9, 1987Date of Patent: July 5, 1988Assignee: Robertshaw Controls CompanyInventor: Daniel L. Fowler