Hand level instrument with composite metal and plastic body

Details Hand level instrument with composite metal and plastic body Hand level instrument with composite metal and plastic body

1993-02-09

1994-08-23

Cuchlinski, Jr., William A.

Geometrical instruments

Straightedge type

Square and sliding nonpivotal straightedge

33379, 33464, 33451, G01B 714

Patent

active

053395301

ABSTRACT:
A hand tool usable as a combination square having a precalibrated angle measuring vial and enhanced tensile strength, comprising a composite metal and plastic body, wherein a frame, including the working surfaces of the tool, is made from metal for precision and long-term durability, and the remainder of the body, including critical interactive portions of the tool, is made from an injection molded plastic matrix and the method of manufacture. The molded matrix is retained by frame elements providing blade support in cooperation with the frame, structure for a blade retaining means and structure for vial mounting.

REFERENCES:
patent: 2122875 (1938-07-01), Witchger
patent: 3921306 (1975-11-01), Provi
patent: 4125490 (1978-11-01), Hettinga
patent: 4757615 (1988-07-01), Cecil

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