Heated drafting board

Details Heated drafting board Heated drafting board

1979-09-04

1981-02-10

Albritton, C. L.

Electric heating

Heating devices

Combined with diverse-type art device

219201, 312231, 312236, H05B 100

Patent

active

042503965

ABSTRACT:
An electrically heated drafting board having a drawing surface temperature ranging between 80.degree. and 90.degree. F. The drafting board having a plurality of interconnected parallel grooves spaced apart the length thereof. The grooves are provided in the underside of the drafting board and serve to receive an electric heating wire. A panel member is connected to the underside of the board overlapping the grooves and wire therein. The electric heating wire forming the heating circuit terminates with a cord exterior of the board having a plug for inserting in an electric receptacle for the power source. A control is provided in the circuit to regulate the voltage. The electric heating circuit provides sufficient heat to the drafting board so that the drawing surface is heated to a temperature ranging between 80.degree. and 90.degree. F.

REFERENCES:
patent: 1401458 (1921-12-01), Boon
patent: 2024153 (1935-12-01), Eskin
patent: 2612585 (1952-09-01), McCann
patent: 2674062 (1954-04-01), Tull
patent: 2834862 (1958-05-01), Meyers
patent: 2939807 (1960-06-01), Needham
patent: 2963565 (1960-12-01), Moore et al.
patent: 3041441 (1962-06-01), Elbert et al.
patent: 3156813 (1964-11-01), Trainer
patent: 3420981 (1969-01-01), Martinet
patent: 4099469 (1978-07-01), Sahli

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