Geometrical instruments – Straightedge type – Rules
Patent
1998-04-30
2000-08-08
Fulton, Christopher W.
Geometrical instruments
Straightedge type
Rules
33732, 33600, G01B 304
Patent
active
060983019
ABSTRACT:
A chain measuring system which allows quick and simple calculation of the number of links in various types of chains such as roller chain, saw chain or link chain. The inventive device includes an elongated member, a plurality of equally spaced notches within a side of the elongated member forming a plurality of pegs, each of the pegs having an arcuate end, a plurality of link count indicia within the elongated member and adjacent each notch, and a length indicia within the elongated member. The rollers of each link of a roller chain are removably positionable within the notches. The link count indicia indicate how many links are within the chain by the user simply viewing the link count indicia adjacent the last link. Preferably, the elongated member includes an augmented portion which provides space between the pegs and another surface such as a wall. In an alternative embodiment, a base member is attached traversely to the elongated member opposite of the plurality of notches for retaining the elongated member in a substantially upright position when positioned upon a flat surface.
REFERENCES:
patent: 1933446 (1933-10-01), Olson
patent: 2579664 (1951-12-01), Gleasman
patent: 3805390 (1974-04-01), Craig
patent: 4092781 (1978-06-01), Blake
patent: 4151652 (1979-05-01), Palma
patent: 4365420 (1982-12-01), Walden
Fulton Christopher W.
Neustel Michael S.
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