Pipe ruler

Details Pipe ruler Pipe ruler

1997-12-04

2000-04-04

Fulton, Christopher W.

Geometrical instruments

Gauge

Circular size

33759, 33529, 336791, 33542, G01B 310

Patent

active

060445726

ABSTRACT:
An apparatus is provided for determining a type of insulation for a first pipe and a second pipe having a first predetermined cross-sectional wall thickness a second predetermined cross-sectional wall thickness, respectively. The apparatus includes a ruler sheet having a bar situated thereon. Also provided is a pair of scales each including a plurality apertures formed therein through the ruler sheet and a unique inner diameter indicia situated adjacent each aperture. Such pair of scales include a copper tube scale and a iron pipe scale situated on the ruler sheet. The apertures of each scale are offset a predetermined amount to compensate for the difference between the first and second predetermined cross-sectional wall thickness.

REFERENCES:
patent: 1497492 (1924-06-01), Engel
patent: 2637114 (1953-05-01), McHugh
patent: 3407507 (1968-10-01), Brubaker
patent: 4811489 (1989-03-01), Walker

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