The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 22, 1993
Filed:
Jun. 18, 1992
Melvin A Lace, Prospect Heights, IL (US);
Other;
Abstract
An add-on device that modifies the operating characteristics (e.g., amplitude, frequency response, 'sustain') of the output signal of an electromagnetic pickup for a stringed musical instrument, such as a guitar with steel strings; the modification device includes one or more transversely magnetized thin, flat permanent magnets. The signal modification device covers most or all of the top surface of an electromagnetic pickup. In one form the signal modification device comprises a thin, flat permanent magnet member formed of resin impregnated with particulate permanent magnet material and magnetized transversely to its thin dimension, either uniformly or in a predetermined pattern; in another form the device includes one or more discrete thin, flat permanent magnets for each instrument string, mounted on a base sheet that may also have permanent magnet characteristics or that may be non-magnetic. The add-on device may include one or more mounting elements for mounting it on a pickup; in the simplest form the mounting element may comprise a rim or one or more steel plates. The steel plate(s) may also function to modify the output signal of the pickup.