Electromagnetic pickup for a stringed musical instrument

Claim 1

An electromagnetic pickup for a stringed muscial instrument of the type including a body, a tailpiece, a plurality of strings, and a bridge for supporting said strings in spaced relationship with the upper surface of said body, comprising, in combination, a casing having a top wall and a sidewall having a marginal edge defining an opening in said casing, an electromagnet positioned in said casing, a variable rheostat having an adjusting knob supported on said casing, circuit means on said casing for electrically connecting said electromagnet and said rheostat to an associated source of electrical power, a diaphragm of magnetic material positioned in said opening, a cover of resilient insulating material detachably mounted on said casing marginal edge portion for retaining said diaphragm in said casing opening, said cover having an opening for externally exposing a portion of said diaphragm, an elongated feeler member having an inner end secured to said diaphragm, said feeler member extending outwardly from said casing through said cover opening and having an outer end arranged for engagement with said bridge, means for supporting said casing on said instrument in an elevated, operative position over said body upper surface and in spaced-apart, isolated relationship with said body with said feeler member outer end in engagement with said bridge to permit the vibrations of said bridge to be translated into electrical impulses by said pickup for the reproduction of sound.