Electric heating – Heating devices – With current connection and/or disconnection means
Patent
1978-10-06
1980-12-23
Bartis, A.
Electric heating
Heating devices
With current connection and/or disconnection means
34202, 200 6159, 219219, 219242, 219521, 350 61, H05B 102, H01H 316, F26B 1900
Patent
active
042412900
ABSTRACT:
An electrical heater device for heating a clinical mirror. The device comprises a housing having a top, bottom and side walls to define a hollow enclosure. Two spiral coiled electric heating elements are secured in the housing with their heat radiating surface spaced apart and facing each other in juxtaposition to provide concentrated heat in a mirror locating space therebetween. An opening is provided in the top wall in alignment with the mirror locating space through which the mirror can be inserted into the mirror locating space. A switch is positioned in alignment with the mirror locating space below the heating elements. The switch has an activating contact on an upper face thereof located in alignment with the opening in the top wall and the mirror locating space for activation by a clinical mirrow when the mirror element of such is inserted into the mirror locating space. The activating contact has a centering element shaped to position and maintain the mirror element of the clinical mirror in centered alignment between and with the heat radiating surfaces of the electric heating elements in the mirror locating space. Electrical connections are provided for connecting the heating elements and the switch to a current source for energization of the heating elements when the switch is activated by engagement of the activating contact by the mirror element of the clinical mirror inserted through the opening in the top wall.
REFERENCES:
patent: 1184949 (1916-05-01), Gwynn
patent: 1417079 (1922-05-01), Lebzelter
patent: 1604972 (1926-11-01), Clarke
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patent: 3703634 (1972-11-01), Bucky
patent: 3723704 (1973-03-01), Silverthorne
patent: 3816705 (1974-06-01), Ebert
Bartis A.
Houle Guy J.
Mitchell Robert E.
Swabey Alan
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