7 •

grooved to accommodate reinforcing beam 74 containing two strips 70 and 72 of high.modulus of elasticity material. The beam is "spaced from the neutral axis of the remainder of the neck so as to effectively resist bending of the neck under string tension."- DWM

4,117,265

43.66.Ts HYPEROPTIC TRANSLATOR SYSTEM

Richard K. Gefiach, Rolling Hills Estates, California 90274 26 September 1978 (Class 179/1 SP); fred 28 June 1976

This concerns a sound-to-optic translator system for the hard of hearing. Light transmitting diodes of different colors provide sources of fight located directly in front of the pupil of the eye to project overlapping color discs onto the macula area of the retina. Audio frequencies are separated by bandpass filters to activate respective diodes to transmit colors onto the macula.- FWK

3,990,220

43.75. Mn METHOD AND APPARATUS FOR FORMING

WOUND MUSIC STRING

William H. Cha•fce, assignor to Model Builders, Incorporated 9 November 1976 (Class 57/11); filed 27 May 1975

This is an apparatus for winding a helical wire wrapping around a core wire for piano bass strings and the like. In contrast to the conventional machine for this purpose in which the core wire simply rotates while the head supplying the wrapping wire moves

/7'

4,119,008

43.75. Mn MEANS FOR IMPROVING THE REPETITION

CHARACTERISTICS OF AN UPRIGHT PIANO ACTION

Thomas E. Kimble, assignor to D. H. Baldwin Company 10 October 1978 (Class 84/242); fried 9 February 1977

In order to improve the repetition characteristics of an up- right piano action a spring and linkage assembly is added to a conventional action. Ball head adjustment screw 67 at the bottom of the assembly is threaded into conventional wippen 16. Com- pression spring 64 within bore 63 of guide sleeve 62 rests on the ball. Rod 60 is threaded to the guide sleeve at 60b and is bent at upper end 60a into a hook-like configuration rotatively secured within a bushing 61 mounted in the hammer butt not shown.

•'o

"After escapement of the jack from beneath the hammer butt, relative movement of the wippen and hammer butt loads the spring and linkage assembly to render it capable of supporting the weight of the hammer, so that if the key is partially released and the hammer comes out of check the spring and linkage assembly will support the hammer in an intermediate position permitting the jack to return to its operating position beneath the hammer butt without full release of the key."-DWM

3,986,427

43.75. Pq APPARATUS AND METHOD FOR PRODUCING CHORDAL MUSIC

Gene L. Swain, Fort Wayne, Indiana 46805 19 October 1976 (Class 84/377); filed 5 August 1974 This is an automatic chord harmonica in which air is blown

through mouthpiece 40, and through one or more holes prese- lected by one of chord keys 36a-f. The musical key in which the

42,*

along the core wire, this machine feeds the core wire 20 axially toward the stationary wrapping equipment. One set of rollers 27 engages the core wire just ahead of wrap 13 and a second set of rollers 33 engages the wrapped wire subsequent to the wrapping operati'on.-DWM

notes are sounded depends upon which keyblock 38 is used to slide the reedblock inside the casing into registration with the pre- selected holes. This is intended to reduce the skill needed to play the harmonica correctly.-DWM

288 J. Acoust. Soc. Am. 65(1), Jan. 1979; 0001-4966/79/010288-01500.80; ¸ 1979 Acoust. Soc. Am.; Patent • Reviews 288

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