Automatic orientation circuit indicator device for portable powe

Details Automatic orientation circuit indicator device for portable powe Automatic orientation circuit indicator device for portable powe

1977-10-27

1980-02-19

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

33334, 200 6152, 200DIG29, G08B 1321

Patent

active

041897269

ABSTRACT:
A gravity-activated, electric switch rigidly mountable on any type of tool which is to be used in a precisely accurate position respective to a horizontal or vertical plane includes a sealed cylindrical case having an electric contact at each end, a spherical steel ball activated by gravity to freely roll inside the case for making electrical connection between the contacts, the contacts being located so that the gravity-activated ball makes connection therebetween only when the tool is in a precisely accurate position respective to a horizontal or vertical plane.

REFERENCES:
patent: 2511525 (1950-06-01), Bradwell et al.
patent: 2825978 (1958-03-01), Davis
patent: 3752945 (1973-08-01), Achterberg
patent: 3864839 (1975-02-01), Wolf

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