Electric heating – Heating devices – With power supply and voltage or current regulation or...
Patent
1987-05-07
1989-04-25
Paschall, M. H.
Electric heating
Heating devices
With power supply and voltage or current regulation or...
219419, 219509, 5422, 337322, 236 57, H05B 102
Patent
active
048250473
ABSTRACT:
A controller for an electric resistance waterbed mattress heater supplied with electric current by an elongate power cord extending between the heater and a power service outlet. The controller includes a small diameter elongate cylindrical housing in which an adjustable on and off switch is mounted and into which the cord is extended and connected with the switch. The switch includes a Bourdon tube to actuate the switch between opened and closed positions when the tube is caused to deflect by changes of pressure therein. A capillary tube is connected with and extends from the Bourdon tube to the exterior of the housing and about which it is formed and supported. An adjusting knob is positioned at one end of the body and is coupled with a part of the switch to move switch parts relative to each other and to the Bourdon tube to adjust and set the operating position of parts of the switch.
REFERENCES:
patent: 3617972 (1971-11-01), Branson
patent: 3873808 (1975-03-01), Patton
patent: 3924142 (1975-12-01), Holtkamp
patent: 3988577 (1976-10-01), Leitner et al.
patent: 4352976 (1982-10-01), McMullan
patent: 4490708 (1984-12-01), Thompson et al.
patent: 4626819 (1986-12-01), Drapeau
patent: 4700168 (1987-10-01), Sirois et al.
Maxwell Georges A.
Paschall M. H.
Thermafoil Products Inc.
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