US930869A - Piano. - Google Patents

Description

F. LEOLA.

PIANO.

APPLICATION FILED JAN. 25, 190s.

tvv-Viv an: "Ti

at landt-i Q FLORENCE LEOLA, OF OAMPERDOWN, NEAR SYDNEY, NEW SOUTH WALES, AUSTRALIA.

PIANO Specification or" Letters Patent.

Patented Aug. 10, 1909.

Application filed January 25, 1909. Serial No. 474,148.

To all whom it' may concern.'

Be it known that FLonnivon intona, a subject et the King of Great Britain and treland, residing at 120 George street, Camperdown, near Sydney, in the State of New South lllales, Australia, have invented certain new and useiul improvements in Fianos and Such like `i'nstruments, of which the tollowing is a speeication.

This invention relates to improvements in pianos. The tuning pin at present used in this class ot instrument is retained in the requisite position against the strain ot the wire by means of a pressure screw and locknut manipulated from the bach of the instrument, but this construction necessitates the removal of a portion of the bach covering of the piano in order to replace a broken pin and usually requires the employment oi' a second person to manipulate the said retaining screws.

Now this invention has for its object to provide a tuning pin, the retaining screw of which can be adjusted trom the front of the vrest-plate.

The invention consists essentially et a tuning pin the exposed portion oit which is oi ordinary construction but the portion which is bedded in the wrest-plate consists of a conical enlargement forming a shoulder against which bears the retaining screw. i-"i corresponding aperture, tapered to receive this enlarged portion of the pin, is provided in the wrest-plate and so constructed that the shoulder of the enlargement is nearly flush with the face of the wrest-plate. rlhe retaining screw is inserted in the wrest-plate immediately above the tuning pin, in such a position that the under surface of its head bears against the shoulder formed by the conical enlargement of the pin. But in order that the invention may be clearly uuderstood reference is made to the accompanying sheet of drawings in which Figure l is a sectional perspective view of a portion of the wrest plate of a piano showing some of the improved tuning pins in position. Fig. 2 is a vertical section showing two pins in position one in elevation the other in section. F ig. 3 shows a perspective view of the pin and retaining screw also the tapered aperture in the wrest-plate to receive the pin.

The pin el is formed with al very slightly conical enlargement 5 fitting into correspondinglv tapered aperture (5 in the wrestplate T. ihe retaining screw 8 is let into the. traine immediately above the pin in such a position that the under surface of its head 9 bears against the shoulder' l0 ot the pin. it will follow from this construction that the downward strain on the pin will, when the wire is at tension, tend to cause the shoulder of the pin to bear continuously against the head ot the screw. To provide t'or the possibility otl the parts becoming worn a recess ll is formed in the traine to receive the head et the screw. To permit ot lubrication a small hole l2 is provided extending transversely Yfrom the end ot the tapered aperture G to the back of the wrest-plate. This hole will also serve to enable a broken pin to be driven out ot its seat.

The method of operating my invention is as follows:-The key having been fitted on to the free end of the pin and the wire having been strained to the requisite tension, the retaining screw 8 is screwed hard against the shoulder l() oi the pin, thus firmly binding same and assuring the necessary friction thereon to prevent its being revolved backward by the pull of the wire.

lWhat claim as my invention is zl. in a piano, in combination, a metallic wrest plate having tapered pin holes therein and screw holes immediately thereabove, a plurality ot tuning pins having tapered shanks and a shoulder at the front end of said shaulrs, and a corresponding number ot screws inserted in said screw holes and having heads adapted to engage the shoulders ot said pins.

2. ln a device of the class described, in combination, a metallic wrest plate having a plurality of tapered holes therein and Jin.

Signed at Sydney New South lll/Tales this 23rd day of November 1908.

FLORENCE LECLA.

gaging the shoulder of its Corresponding le l Witnesses ARTHUR GIPPEL, JOHN P. BRAY.

Images