Trammel point attachment to steel tape rule

Details Trammel point attachment to steel tape rule Trammel point attachment to steel tape rule

1984-09-28

1985-10-22

Stearns, Richard R.

Geometrical instruments

Scriber

Curved line

33158, B43L 904, G01B 500

Patent

active

045479739

ABSTRACT:
A set of attachments which affix to a steel tape rule comprising a zero attachment which attaches adjacent to the zero end of the steel tape rule, and a case attachment which attaches to the case of the steel tape rule, and wherein the attachments each hold a scribing pin, commonly called trammel points, and wherein the zero attachment may additionally or in the alternatively hold a pencil or soapstone or chalk. The zero attachment affixes to the steel tape rule near the zero end of the steel tape rule, while the case attachment affixes to the case of the steel tape rule and when so attached provides for allowing the steel tape rule and the zero attachment to be extended from the case, and then the case attachment locks the steel tape rule in the extended position. Thus lofting, and measurements, as well as scribing arcs of substantial diameter are made easier and significantly faster, with no loss in accuracy.

REFERENCES:
patent: 1115390 (1914-10-01), Cady
patent: 3095651 (1963-07-01), Luedicke, Jr.
patent: 3393454 (1968-07-01), Creighton

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