Slide rule cursor

Details Slide rule cursor Slide rule cursor

1975-09-22

1978-01-31

Jackmon, E. S.

Registers

Calculators

Bar

235 61GM, 235 70R, 235 70C, G06G 102

Patent

active

040711897

ABSTRACT:
A slide rule cursor which is adapted for use with conventional slide rules to provide direct resolution of the resultant value of parallel and/or series impedances. The cursor is not only movable axially along the body of the slide rule in a conventional manner but is also movable perpendicularly to the axial direction of the body of the slide rule. The cursor has printed on it a series of curves from which unique values of a special coefficient referred to as .mu..sub..theta. may be readily obtained for each network of parallel and/or series impedances. This value of .mu..sub..theta. relates the individual impedances in the network through a series of relationships discovered by the inventor to the resultant value of impedance and its angle.

REFERENCES:
patent: 1014344 (1912-01-01), Smith
patent: 2326413 (1943-08-01), Thompson
patent: 2385948 (1945-10-01), Setera
patent: 2585595 (1952-02-01), Spencer
patent: 2892586 (1959-06-01), Graham
patent: 3784093 (1974-01-01), Bennett

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