US3819905A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heater control system
Assignee: Individual
•
Filing: 1973-03-19
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Granted: 1974-06-25
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Expires: 1993-03-19
Abstract
Abstract A heater control system for water bed heaters, in which system temperature sensing circuitry with a temperature sensing element is packaged together with the power supply circuitry for the temperature sensing circuitry, heat sinks are provided to thermally isolate the temperature sensing element from heat given off the power supply circuitry and to also expose the temperature sensing element to the temperature of an adjacent water bed bladder, and electrostatic shielding is provided to avoid capacitative coupling between the sensing circuitry and an adjacent body of water, the water in a water bed bladder, the temperature sensing circuitry including a switch to supply power to a water bed heater at selected temperatures.
Inventors
- 👤 R Trostler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:02
CPC Classifications
H; H05; H05B; H05B3/00; G; G05; G05D; G05D23/00; G05D23/19; G05D23/1906; G05D23/1909; G05D23/20; G05D23/24
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
255 words
A water bed heater control system comprising: power supply circuitry, said power supply circuitry having heat producing elements; sensing circuitry, said sensing circuitry having a temperature sensitive element; said heat producing elements of said power supply circuitry positioned spacially distant from said temperature sensitive element; said power supply circuitry and said sensing circuitry imbedded together in a filler material, said filler material being impermeable to air and water, said filler material being a dielectric but thermally conductive material, said filler material having a substantially smooth top surface; means imbedded in said filler material for dissipating heat generated by said heat producing elements of said power supply circuitry; means imbedded in said filler material for thermally isolating said temperature sensitive element from said heat producing elements of said power supply circuitry, said imbedded means comprising long electrical lead lines to said temperature sensitive element, and a plurality of metal plates lying in the same plane and lying parallel to said top surface of said filler material, said metal plates being spacially adjacent said top surface, said metal plates substantially spanning the distance between said heat producing elements and said temperature sensitive element to provide a plurality of heat sinks to carry heat off to said top surface for conduction to an adjacent body such as a water bed bladder; means imbedded in said filler material for electrostatically shielding said sensing circuitry; and means imbedded in said filler material for transmitting heat originating exteriorly to said top surface of said filler material to said temperature sensitive element.
Claim 2
Dependent Claim
255 words
A water bed heater control system comprising: power supply circuitry, said power supply circuitry having heat producing elements; sensing circuitry, said sensing circuitry having a temperature sensitive element; said heat producing elements of said power supply circuitry positioned spacially distant from said temperature sensitive element; said power supply circuitry and said sensing circuitry imbedded together in a filler material, said filler material being impermeable to air and water, said filler material being a dielectric but thermally conductive material, said filler material having a substantially smooth top surface; means imbedded in said filler material for dissipating heat generated by said heat producing elements of said power supply circuitry; means imbedded in said filler material for thermally isolating said temperature sensitive element from said heat producing elements of said power supply circuitry, said imbedded means comprising long electrical lead lines to said temperature sensitive element, and a plurality of metal plates lying in the same plane and lying parallel to said top surface of said filler material, said metal plates being spacially adjacent said top surface, said metal plates substantially spanning the distance between said heat producing elements and said temperature sensitive element to provide a plurality of heat sinks to carry heat off to said top surface for conduction to an adjacent body such as a water bed bladder; means imbedded in said filler material for electrostatically shielding said sensing circuitry; and means imbedded in said filler material for transmitting heat originating exteriorly to said top surface of said filler material to said temperature sensitive element.
Claim 3
Dependent Claim
91 words
The control system defined in claim 1, wherein said means for dissipating heat generated by said power supply circuitry comprises a metal plate lying parallel to said top surface of said filler material and spacially interposed between said top surface and said heat producing elements of said power supply circuitry, whereby said metal plate acts as a heat sink to carry heat away from said heat producing elements and transmit it to the top surface of the filler material For conduction to an adjacent body such as a water bed bladder.
Claim 4
Dependent Claim
150 words
The control system defined in claim 1, wherein said power supply circuitry is adapted to utilize an electrical input of 110 volts, 60 cycles, and wherein said sensing circuit comprises a bridge circuit with amplified output signal, an electronic switch connected to and controlled by said amplified output signal from said bridge circuit, said electronic switch having a power input line to receive electrical power and power output line to transmit electrical power to a load such as a water bed heater, the amplified output signal from said bridge circuit controlling when said electronic switch permits the passage of electrical power from its power input line to its power output line, and said bridge circuit including a temperature sensitive element and variable electrical impedance element whereby a setting can be selected to cause the electronic switch to operate at temperatures below a desired temperature experienced by said temperature sensitive element.
Claim 5
Dependent Claim
209 words
A water bed heater control system comprising: power supply circuitry, said power supply circuitry having heat producing elements; sensing circuitry, said sensing circuitry having a temperature sensitive element; said power supply circuitry and said sensing circuitry imbedded together in a filler material, said filler material being impermeable to air and water, said filler material being a dielectric but thermally conductive material, said filler material having a substantially smooth top surface; means imbedded in said filler material for dissipating heat generated by said heat producing elements of said power supply circuitry; means imbedded in said filler material for thermally isolating said temperature sensitive element from said heat producing elements of said power supply circuitry; means imbedded in said filler material for electrostatically shielding said sensing circuitry comprising at least one electronically grounded metal plate lying parallel to said top surface of said filler material and spacially interposed between said top surface and said sensing circuitry, thereby eliminating electrical capacitive coupling between said sensing circuitry and the water bed when said top surface of said filler material is placed next to a filled water bed bladder; and means imbedded in said filler material for transmitting heat originating exteriorly to said top surface of said filler material to said temperature sensitive element.
Claim 6
Dependent Claim
209 words
A water bed heater control system comprising: power supply circuitry, said power supply circuitry having heat producing elements; sensing circuitry, said sensing circuitry having a temperature sensitive element; said power supply circuitry and said sensing circuitry imbedded together in a filler material, said filler material being impermeable to air and water, said filler material being a dielectric but thermally conductive material, said filler material having a substantially smooth top surface; means imbedded in said filler material for dissipating heat generated by said heat producing elements of said power supply circuitry; means imbedded in said filler material for thermally isolating said temperature sensitive element from said heat producing elements of said power supply circuitry; means imbedded in said filler material for electrostatically shielding said sensing circuitry comprising at least one electronically grounded metal plate lying parallel to said top surface of said filler material and spacially interposed between said top surface and said sensing circuitry, thereby eliminating electrical capacitive coupling between said sensing circuitry and the water bed when said top surface of said filler material is placed next to a filled water bed bladder; and means imbedded in said filler material for transmitting heat originating exteriorly to said top surface of said filler material to said temperature sensitive element.
Claim 7
Dependent Claim
262 words
A water bed heater control system comprising: power supply circuitry, said power supply circuitry having heat producing elements; sensing circuitry, said sensing circuitry having a temperature sensitive element; said power supply circuitry and said sensing circuitry imbedded together in a filler material, said filler material being impermeable to air and water, said filler material being a dielectric but thermally conductive material, said filler material having a substantially smooth top surface; means imbedded in said filler material for dissipating heat generated by said heat producing elements of said power supply circuitry; means imbedded in said filler material for thermally isolating said temperature sensitive element from said heat producing elements of said power supply circuitry; means imbedded in said filler material for electrostatically shielding said sensing circuitry; and means imbedded in said filler material for transmitting heat originating exteriorly to said top surface of said filler material to said temperature sensitive element comprising a first metal plate lying parallel to and adjacent to said top surface of said filler material, in position to receive heat from any object adjacent said top surface, such as the bladder of a water bed, a second metal plate lying parallel to and beneath said first metal plate, a thermally conductive dielectric tape secured to said second metal plate, said temperature sensitive elemEnt being secured within said tape, and said first metal plate having a flange that curls about said second metal plate and said temperature sensitive element, whereby the temperature at the site of said temperature sensitive element is the same as that of said first metal plate.
Claim 8
Dependent Claim
262 words
A water bed heater control system comprising: power supply circuitry, said power supply circuitry having heat producing elements; sensing circuitry, said sensing circuitry having a temperature sensitive element; said power supply circuitry and said sensing circuitry imbedded together in a filler material, said filler material being impermeable to air and water, said filler material being a dielectric but thermally conductive material, said filler material having a substantially smooth top surface; means imbedded in said filler material for dissipating heat generated by said heat producing elements of said power supply circuitry; means imbedded in said filler material for thermally isolating said temperature sensitive element from said heat producing elements of said power supply circuitry; means imbedded in said filler material for electrostatically shielding said sensing circuitry; and means imbedded in said filler material for transmitting heat originating exteriorly to said top surface of said filler material to said temperature sensitive element comprising a first metal plate lying parallel to and adjacent to said top surface of said filler material, in position to receive heat from any object adjacent said top surface, such as the bladder of a water bed, a second metal plate lying parallel to and beneath said first metal plate, a thermally conductive dielectric tape secured to said second metal plate, said temperature sensitive elemEnt being secured within said tape, and said first metal plate having a flange that curls about said second metal plate and said temperature sensitive element, whereby the temperature at the site of said temperature sensitive element is the same as that of said first metal plate.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |