Music – Instruments
Patent
1976-02-11
1977-09-27
Jackmon, E. S.
Music
Instruments
84 116, G10D 500, G10H 308
Patent
active
040503410
ABSTRACT:
An electromagnetic pickup is provided for musical instruments, particularly of the type having vibrating magnetizable strings, which pickup device includes a permanent magnet having a configured surface adjacent to the magnetizable strings to provide a varying magnetic field effecting respective ones of the strings in accordance with their magnetizability, and a low impedance coil surrounding the permanent magnet. The permanent magnet is a rectangular bar magnet being magnetized perpendicularly to the configured surface, with the configured surface providing a cross-sectional variation of a dimension of the bar magnet, thereby varying the magnetic field effecting the different strings. Particular cross-sectional variations of this dimension are included, each of which achieves the natural tone of the respective strings and enhances the balance therebetween of the pickup output.
REFERENCES:
patent: 2972922 (1961-02-01), Rhodes
patent: 2976755 (1961-03-01), Fender
patent: 3657461 (1972-04-01), Freeman
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