Electric heating – Heating devices – With heater-unit housing – casing – or support means
Patent
1989-04-06
1990-12-04
Bartis, Anthony
Electric heating
Heating devices
With heater-unit housing, casing, or support means
116282, 219506, 337361, 338196, H05B 102, H05B 378, H01H 3752
Patent
active
049755625
ABSTRACT:
A heater for heating water in an aquarium tank is provided with a thermostat which includes a bimetal strip carrying one contact and another strip carrying another contact. Upon deformation of the bimetal strip in response to temperature changes, the contacts are closed to connect the heater with an electrical supply circuit. The distance between the contacts is initially set by a rotatable cam acting on a curved portion of the bimetal strip. A cylindrical body which supports the cam to rotate the latter is provided with a helical groove in which is engaged an indicator captured in an elongated axial slot formed in a support of the cylindrical body. The support has at least one scale on its surface visible through a glass container of the heater. When the cam is rotated to change the distance between the contacts this change is indicated by the position of the indicator on the scale.
REFERENCES:
patent: 2278629 (1942-04-01), Winning
patent: 2839660 (1958-06-01), Davies
patent: 2888537 (1959-05-01), Mears
patent: 3107290 (1963-10-01), Willinger
patent: 3229659 (1966-01-01), Sciascia
patent: 3564589 (1971-02-01), Arak
patent: 3678434 (1972-07-01), Brooks
patent: 4072847 (1978-02-01), Craven
patent: 4812626 (1989-03-01), Strada
Bartis Anthony
Willinger Brothers, Inc.
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