Electric heating – Heating devices – With heater-unit housing – casing – or support means
Patent
1976-11-15
1979-04-10
Truhe, J. V.
Electric heating
Heating devices
With heater-unit housing, casing, or support means
219331, 219552, 338236, 338240, 338270, H05B 554
Patent
active
041490673
ABSTRACT:
An aquarium heater including an elongated heater element including an insulating member and a wire heater extending from one end of the insulating member to the other end of the insulating member and with an outer sheath of insulating material having open and closed ends for enclosing the heater element at the closed end and having an inner dimension larger than the outer dimension of the heater element and with a pair of spacer members disposed individually at each end of the insulating member of the heater element for spacing the heater element from the inner surface of the outer sheath and with the spacer members including means for retaining the ends of the wire heater in fixed positions at each end of the insulating member and with a resilient sealing element disposed from the open end of the sheath to seal the heater element in the closed end of the sheath and with the sealing element including grooves for passing electrical wires for supplying electrical energy to the wire heater.
REFERENCES:
patent: 2511902 (1950-06-01), Cabrera
patent: 2811629 (1957-10-01), Danner
patent: 2864929 (1958-12-01), Schwing
patent: 2875309 (1959-02-01), Pearce
patent: 3051922 (1962-08-01), Julie
patent: 3107290 (1963-10-01), Willinger
patent: 3371192 (1968-02-01), Rosenel
patent: 3440109 (1969-04-01), Plattner
patent: 3754118 (1973-08-01), Booker
patent: 3812580 (1974-05-01), Drugmond
patent: 3882297 (1975-05-01), Avalon
patent: 3895217 (1975-07-01), Hall et al.
Boettger Erhard
Jager Wolfgang
Paschall M.
Schwartz Charles H.
Truhe J. V.
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