Electric heating – Heating devices – With heater-unit housing – casing – or support means
Patent
1974-06-13
1977-05-03
Bartis, A.
Electric heating
Heating devices
With heater-unit housing, casing, or support means
119 5, 219326, 219331, 219335, 219513, 337120, 337315, H05B 380, H05B 102, H01H 3744, A01K 6402
Patent
active
040216438
ABSTRACT:
A thermostatically controlled safety heater for upright immersion in an aquarium includes a housing with an axially extending, heat-transmitting tube forming a chamber in which an electric heating element is disposed in radially spaced relation from the tube. The radial space between the tube and element, over substantially the axial length of the element, is filled with a heat conducting, thermally expansible liquid. An actuator device including a linearly movable plunger reactive to thermal expansion of the liquid is provided for opening and closing a switch in circuit with the heating element for maintaining the heater at a desired temperature. A hunting tendency of the switch contacts is overcome by providing a damping medium in the form of an air space having a volume less than about ten per cent of the volume of liquid between the plunger and the liquid. An expansible sealing diaphragm supports the plunger and isolates the liquid to the portion of the tube in which the heating element is disposed.
REFERENCES:
patent: 1178777 (1916-04-01), Apfel
patent: 1690986 (1928-11-01), Macy
patent: 1691749 (1928-11-01), Williams et al.
patent: 1718865 (1929-06-01), Macy
patent: 1718866 (1929-06-01), Macy
patent: 1820842 (1931-08-01), Sparks
patent: 2524886 (1950-10-01), Colander et al.
patent: 2666838 (1954-01-01), Krah et al.
patent: 2697766 (1954-12-01), Goldmuntz
patent: 2699488 (1955-01-01), Arak et al.
patent: 2780703 (1957-02-01), MacIntyre
patent: 2811629 (1957-10-01), Danner
patent: 2888547 (1959-05-01), Saper
patent: 2987602 (1961-06-01), Hodges
patent: 3073940 (1963-01-01), Brandl
patent: 3107290 (1963-10-01), Willinger
patent: 3166893 (1965-01-01), Sherwood
patent: 3250521 (1966-05-01), Sergent
patent: 3444356 (1969-05-01), Finn
patent: 3511970 (1970-05-01), Kjellberg
patent: 3536893 (1970-10-01), Cranley
patent: 3564589 (1969-10-01), Arak
patent: 3619565 (1971-11-01), D'Elia et al.
patent: 3731058 (1973-05-01), Bleiweiss
patent: 3764780 (1973-10-01), Ellis
patent: 3833792 (1974-09-01), Kodaira
patent: 3895217 (1975-07-01), Hall et al.
Hall Frank Kenneth
Moore Ronald D.
Bartis A.
O'Dell Manufacturing, Inc.
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