Mechanism for vertically movably supporting a board member on a

Details Mechanism for vertically movably supporting a board member on a Mechanism for vertically movably supporting a board member on a

1983-10-26

1985-08-20

Skogquist, Harland S.

Education and demonstration

Means for demonstrating apparatus, product, or surface...

Chalkboard or equivalent means having easily erasable surface

B43L 104

Patent

active

045361630

ABSTRACT:
A wall board includes a board support mechanism which is adapted to be secured to a vertical wall surface and a board member which is vertically movably supported on the board support mechanism. The board support mechanism includes an arrangement which counterbalances the weight of the board member. Laterally spaced, vertically extending side walls extend rearwardly from the board member on opposite sides of the board support mechanism to locations adjacent the vertical wall surface. The inner sides of the side walls have vertically extending guide rails which receive guide slides or guide rollers provided on the board support mechanism.

REFERENCES:
patent: 579767 (1897-03-01), Mushoff
patent: 604422 (1898-05-01), Schneider
patent: 1394572 (1921-10-01), Neil
patent: 3037301 (1962-06-01), Siepel
patent: 3269035 (1966-08-01), Bong

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