Daniel O Roach

US Patent:

48358770, Jun 6, 1989

Filed:

Sep 30, 1988

Appl. No.:

7/252384

Inventors:

Daniel Roach - Bronx NY
George Spector - New York NY

International Classification:

B43L 706

US Classification:

33426

Abstract:

A combined try square and protractor is structured to measure a right angle, to measure center of a pipe and to measure various angles therefrom.

US Patent:

53883390, Feb 14, 1995

Filed:

Sep 16, 1991

Appl. No.:

7/760686

Inventors:

Daniel F. Roach - Bronx NY
George Spector - New York NY

International Classification:

B43L 712

US Classification:

33419

Abstract:

An improved combination square set is provided. It has a square head, a center head, a protractor head and a blade. The improvement is the blade which can be a grooved L-square rule, a grooved T-square rule, a grooved try square and a grooved flat straight rule, so that the improved combination square set can be used to measure and mark quadrants on round stock, the angle of a drill press table and angles on a flat board.

US Patent:

39422526, Mar 9, 1976

Filed:

Aug 26, 1974

Appl. No.:

5/500477

Inventors:

Daniel F. Roach - New York NY
George Spector - New York NY

International Classification:

B43L 700

US Classification:

33 75R

Abstract:

A quadrant for use by draftsmen; the device consisting of two arms attached pivotally together at one end, and including degree calibration, so the angle between the arms is readily read, and the device including locking means whereby the angle between the arms can be maintained fixed.

US Patent:

47441526, May 17, 1988

Filed:

Jan 16, 1987

Appl. No.:

7/004194

Inventors:

Daniel Roach - Bronx NY
George Spector - New York NY

International Classification:

B43L 700

US Classification:

33471

Abstract:

A protractor quadrant tool accessory is provided and consists of two arms attached pivotally together at one end, degree calibrations so that the angle between the arms is readily read and a locking device whereby the angle between the arms can be maintained fixed so that the protractor quadrant tool accessory can be used by a machinest and carpenter to measure angles on various articles. In a modification stud guides attached to outer parallel straight edges of the arms can stabilize the tool accessory when measuring the stairways stud angles and the like, used as an isometric center finder and making equal and opposite converse lines upon a stud. In still another modification an adjustable trimitre is slideably locked upon one arm so as to stabilize the tool accessory when measuring the stud angles and the like to be cut.