Electrically heated wax spatula using a diode as the heating ele

Details Electrically heated wax spatula using a diode as the heating ele Electrically heated wax spatula using a diode as the heating ele

1979-08-23

1981-11-17

Bartis, A.

Electric heating

Heating devices

Tool or instrument

165185, 219239, 219240, 219501, 219541, 433 32, H05B 100, A61C 1320, B23K 304

Patent

active

043013570

ABSTRACT:
An electrically heated spatula for working heat softenable materials, such as dental wax, includes an elongated hollow sleeve secured at one end to a handle and having a heat producing diode unit supported at the other end. The diode unit includes a hollow metallic cylinder with an apertured metallic end wall. A forward biased diode has a threaded mounting stud disposed in the end wall aperture and is supported in interior of the cylinder in spaced non-contacting relation thereto. The stud extends outwardly of the other end of the sleeve and removably supports a working tip. Power supply conductors extend through the handle and sleeve and are connected to the anode of the diode within the cylinder and to the cathode of the diode through the cylinder, end wall and mounting stud. The arrangement minimizes undesirable transfer of heat from the diode to the cylinder and sleeve and maximizes transfer of heat through the threaded stud to the tip.

REFERENCES:
patent: 2725505 (1955-11-01), Webster et al.
patent: 2887628 (1959-05-01), Zierdt
patent: 3178556 (1965-04-01), Cornwall et al.
patent: 3333086 (1967-07-01), Williams
patent: 3358152 (1967-12-01), Alexakis
patent: 3782366 (1974-01-01), Brown
patent: 3902043 (1975-08-01), Rogan

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