Electromagnetic pickup for stringed musical instrument, and...

Details Electromagnetic pickup for stringed musical instrument, and... Electromagnetic pickup for stringed musical instrument, and...

2011-08-09

2011-08-09

Donels, Jeffrey (Department: 2832)

Music

Instruments

Electrical musical tone generation

C084S728000

Reexamination Certificate

active

07994413

ABSTRACT:
An electromagnetic pickup for a musical instrument, has two coils (2, 3) with pole pieces (4-8, 9-13) in their core regions and a connection that connects the two coils together, out of phase, in series or in parallel, so that they cancel each others extraneous noise and hum. To accomplish a noise-free pickup with the clarity and dynamics of a single coil pickup, and a uniform output level throughout its longitudinal axis, the coils are partly overlapping each other, the pole pieces in the core region of the first coil are partly overlapping with the pole pieces in the core region of the second coil, and the coils (2, 3) with the pole pieces (6-8, 1-13) induce the same voltage in the overlapping area (14) as the voltage induced by the coils and the pole pieces in their core regions outside the overlapping area (14).

REFERENCES:
patent: 2896491 (1959-07-01), Lover
patent: 4442749 (1984-04-01), DiMarzio et al.
patent: 4524667 (1985-06-01), Duncan
patent: D319456 (1991-08-01), Fender
patent: 5111728 (1992-05-01), Blucher et al.
patent: 5530199 (1996-06-01), Blucher
patent: 5668520 (1997-09-01), Kinman
patent: 6291759 (2001-09-01), Turner
patent: 2002/0069749 (2002-06-01), Hoover et al.
patent: 2 364 594 (2002-01-01), None
Finnish Search Report dated Sep. 7, 2009, from corresponding Finnish application.

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