Capo-tremolo-slide attachment for guitars

Claim 1

A capo-tremolo-slide device for guitars comprising a pair of spaced parallel guide tracks adapted for attachment to a guitar sounding body on opposite sides of the guitar strings and extending longitudinally of the sounding body and strings for the major portion of the length of the sounding body in parallel relationship to the strings, said guide tracks including bottom walls, outer side walls and top walls and being open along their interior sides, an arched carriage including an elevated center portion disposed above said strings and across the strings and depressed end portions disposed near and above the bottom walls of said guide tracks, said end portions of the arched carriage being bifurcated to form a pair of spaced parallel arms on each end of the arched carriage at a common elevation, said arms being spaced apart longitudinally of the guide tracks and strings, wheels journaled on the arms and being guidingly engaged with said guide tracks, the elevated center portion of the arched carriage having a substantially rectangular opening formed therethrough and said opening being elongated across said strings and spanning the entire plane occupied by the strings, a slide bar disposed on said opening and adapted to move vertically therein, the bottom of the slide bar being adapted to engage the tops of said strings when the slide bar is depressed, a pair of adjusting screws engaged within threaded openings in the elevated center portion near the opposite ends of said opening, apertured lugs on the ends of the slide bar adjacent to its top face and the apertures of said lugs being engaged guidingly with said adjusting screws, and variable tension compression springs surrounding said adjusting screws between the bottoms of said apertured lugs and the top face of said elevated center portion.