Positioning device

Details Positioning device Positioning device

1978-11-22

1980-07-15

Pitrelli, John F.

Card, picture, or sign exhibiting

Display card

Having a curved display panel

33371, 33391, 40617, 248495, 248542, G09F 0112

Patent

active

042121230

ABSTRACT:
A positioning device is provided which is adapted to be secured to the back edge of a picture frame or the like. The device comprises a pivotally mounted indicator arm adapted to freely hang in the vertical plane when the picture frame on which disposed is in a normal hung position. When the picture frame is horizontally level no portion of the indicator arm is visible from the picture front; when the picture is not level a portion of the indicator is visible to the picture viewer.

REFERENCES:
patent: 1407177 (1922-02-01), Stone
patent: 1618237 (1927-02-01), Sturm
patent: 2681194 (1954-06-01), Halvorsen
patent: 2685859 (1954-08-01), Donnell
patent: 2798320 (1957-07-01), Montalto
patent: 2952431 (1960-09-01), Pedley
patent: 3265339 (1966-08-01), Hushek
patent: 4100681 (1978-07-01), Hollander

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