Bimetal thermostats and method of manufacture

Details Bimetal thermostats and method of manufacture Bimetal thermostats and method of manufacture

1986-01-06

1987-09-22

Goldberg, Howard N.

Metal working

Method of mechanical manufacture

Combined manufacture including applying or shaping of fluent...

428619, 428616, 148 62, B23P 1700, C23C 1640

Patent

active

046945580

ABSTRACT:
Ferrous bimetals bearing easily read indicia and methods of making them. The bimetals of the present invention have a transparent oxide coating of a controlled thickness in the interference range and are prepared by immersing them in a acid bath, then washing away a film that is formed, followed by tempering them in an oxidizing atmosphere. Bimetals prepared this way have a golden hue an are easily marked with indicia that can be read by a consumer.

REFERENCES:
patent: 3759753 (1973-09-01), Becca et al.
patent: 3839096 (1974-10-01), Skedgell et al.
patent: 3847685 (1974-11-01), Baboian et al.
patent: 4026737 (1977-05-01), Takahari et al.
patent: 4370210 (1983-01-01), Yoshihara et al.
patent: 4414286 (1983-11-01), Ty

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