Pipe Protractor and Calculator (Patent No: 528692)

Inventor: Whybrow, Edward W.

Location: Edmonton

Comments: N/A

Description: 528,692

Issued August 7, 1956

Pipe Protractor and Calculator

Edward W. Whybrow, Edmonton, Alberta, Canada Application September 7, 1954, Serial No. 672,446

2 Claims

1. A device for calculating cutting, lines in pipe fitting operations comprising a work board having a quadrant inscribed thereon; a plurality of ordinates radiating from the center of the quadrant across the board to intersect the quadrant; a plurality of scales around the edges of the work board; a ruler adapted to lie horizontally on the work board and to be moved vertically thereover; a straight edge member attached pivotally at one of its ends to the board at the center of the quadrant and adapted to be swung across the surface of the board.

2. A calculating device as claimed in claim 1 wherein a plurality of cutting angles are indicated on the quadrant and a plurality of pipe radii are indicated on the ordinates.