Apparatus for hanging a board

Details Apparatus for hanging a board Apparatus for hanging a board

1977-01-21

1978-09-12

Hafer, Robert A.

Supports

Brackets

Specially mounted or attached

248291, 40602, 40617, A47B 9606

Patent

active

041132165

ABSTRACT:
Apparatus for hanging a board, such as a road sign board or an advertising sign board, comprises a first cam sleeve which is provided rotatably surrounding the axis of a construction for hanging a board and a second cam sleeve which is provided not rotatably but slidably on the same axis of the first cam sleeve. A board is fixed on the first cam sleeve and the one edge face of the second sleeve is pressed against the edge face of the first cam sleeve by the spring arranged at the other side of the second cam sleeve. Each contacting cam faces of the first and second cam sleeves has two sections which are vertical and slanting to the axis of the cam sleeve.

REFERENCES:
patent: 1753506 (1930-04-01), Florine
patent: 1910666 (1933-05-01), Babson
patent: 2030379 (1936-02-01), Lippold
patent: 2304743 (1942-12-01), Schott
patent: 3263365 (1966-08-01), Eckel
patent: 3695610 (1972-10-01), Thompson

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