Trammel adaptor for a square head

Details Trammel adaptor for a square head Trammel adaptor for a square head

1999-02-12

2000-09-19

Bennett, G. Bradley

Geometrical instruments

Scriber

Curved line

33427, B43L 904

Patent

active

061193542

ABSTRACT:
A trammel adaptor for a square head. It has a right angle bracket having a vertical leg and a horizontal leg. A vertically extending left flange is connected to the left edge of the vertical leg and they intersect each other at an acute angle A. A vertically extending right flange is connected to the right edge of the vertical leg and they intersect each other at an acute angle B. The planar inner surface and the respective left and right flanges form a tract for removably receiving the vertical flanges of a square head. An elongated indicator leg is vertically mounted on the bottom of the right angle bracket. The pointed bottom end of the indicator leg may have its height adjusted vertically along a Y-axis that also passes along the vertical rear surface of the square head.

REFERENCES:
patent: 673687 (1901-05-01), Penfield
patent: 2246066 (1941-06-01), Rothe
patent: 2440973 (1948-05-01), Podolan
patent: 2499673 (1950-03-01), Olejniczak
patent: 2645022 (1953-07-01), Hart
patent: 2797491 (1957-07-01), Asperger
patent: 3089245 (1963-05-01), Cromer et al.
patent: 4380872 (1983-04-01), Moran

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