Plural switch combination control for entrance light and bell having pneumatic delay means for opening the entrance light switch

Title:

Plural switch combination control for entrance light and bell having pneumatic delay means for opening the entrance light switch

United States Patent 3101396

Inventors:

Kennedy, William P.

Application Number:

US85880259A

Publication Date:

08/20/1963

Filing Date:

12/10/1959

Export Citation:

Assignee:

Kennedy, William P.

Primary Class:

200/34

Other Classes:

200/520, 340/326, 340/330

International Classes:

H01H7/02; H01H13/54

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US Patent References:

Foreign References:

GB697151A

1953-09-16