Protective cap for the end of a level having an I-shaped cross-s

Details Protective cap for the end of a level having an I-shaped cross-s Protective cap for the end of a level having an I-shaped cross-s

1994-04-15

1995-05-09

Wirthlin, Alvin

Geometrical instruments

Indicator of direction of force traversing natural media

Level or plumb, terrestrial gravitation responsive

33350, G01C 924

Patent

active

054128765

ABSTRACT:
A spirit level includes a spirit level body having an I-shaped cross section, end caps arranged at the end faces of the spirit level body and at least one spirit level vial mounted in the spirit level body. Each end cap has a plate-like base member which is rectangular in the elevational view thereof and whose height and width corresponds to the height and width of the I-shaped cross section of the spirit level body. The base member has on one side thereof two wing lugs which define a gap therebetween. The width of the gap between the wing lugs corresponds to the wall thickness of the web of the spirit level body which is I-shaped in cross section. At least one recess is provided in the end face of the web of the spirit level body. The at least one recess has at least one toothed side. At least one projecting lug is provided within the gap between the wing lugs of the base member. The projecting lug is received in a positively engaging manner by the recess and serves to fasten the base member to the spirit level body. The height of the wing lugs measured at a right angle to the plane of the base member is at least as large as the depth of the recess in the end face of the web measured in the direction of the longitudinal axis of the spirit level body.

REFERENCES:
patent: 4463501 (1984-08-01), Wright et al.
patent: 4979310 (1990-12-01), Wright
patent: 4991303 (1991-02-01), Marth et al.

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