Geometrical instruments – Straightedge type – Plural straightedges – relatively moveable
Patent
1979-11-06
1982-05-04
Phillips, Charles E.
Geometrical instruments
Straightedge type
Plural straightedges, relatively moveable
33451, 33478, 33500, 33376, B43L 706
Patent
active
043275010
ABSTRACT:
Mounting structure is provided for support from one side of an elongated body of a carpenter's level having a window extending transversely therethrough and opening through the aforementioned one side of the body. The mounting structure pivotally supports one end of an elongated arm from a first end of the body for swinging between a first position in superposed parallel relation to the aforementioned one side of the body and a second position with the arm projecting at 90.degree. relative to the body. The window in the body has a spirit level mounted therein and the arm includes a portion thereof in registry with the window having an opening formed therethrough. Also, the mounting structure and arm include coacting first latch portions for releasably retaining the arm in the second extended position thereof and second coacting latch portions for releasably retaining the arm in the first position thereof. Further, the mounting structure and arm are of configurations enabling the mounting structure to be utilized in operatively mounting the arm on substantially all forms of elongated level bodies.
REFERENCES:
patent: 509292 (1893-11-01), Bretz
patent: 563370 (1896-07-01), Goldsberry
patent: 1324411 (1919-12-01), Rosenholm
patent: 1380243 (1921-05-01), Osborn
patent: 1630773 (1927-05-01), Van Gale
patent: 2250830 (1941-07-01), Gonzales
patent: 4152838 (1979-05-01), Cook
Jacobson Harvey B.
Phillips Charles E.
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