US1000365A - Transposing-keyboard for pianos and organs. - Google Patents

Description

P. BIALIK.

TRANSPOSING KEYBOARD FOR PIANOS AND ORGANS.

APPLICATION FILED FEB. 23, 1911. 1,000,365.

Patented Aug. 15, 1911.

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P. BIALIK.

TRANSPOSING KEYBOARD FOR PIANOS AND ORGANS.

APPLICATION IILED FEB. 23, 1911.

11 000 365 Patented Aug. 15, 1911.

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COLUMBIA PLANOOIAPH 60., WAIHINOTON, D- I? UNTTED PAUL BIALIK, OF PINE LA'WN, ll'IISSGURI, ASSIGNOR GE ONE-HALF TO BEN J. BUHLAND, OF ST. LGUIS, MISSOURI.

TRANSPOSING-KEYBGARD FQP/ EIANOS AND ORG-ANS.

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To all whom it may concern:

Be it known that T, PAUL BIALIK, a citizen of the United States, and resident of Pine Lawn, St. Louis county, Missourhhave invented certain new and useful Improvements in Transposing-Keyboards for Pianos and Urgans, of which the following is a specification containing a full, clear, and exact description, reference being had to the accompanying drawings, forming a part hereof.

My invention relates to an improved transposing keyboard for pianos and organs, and consists in the novel construction and combination of parts hereinafter described and pointed out in the annexed claim.

The object of my invention is to provide an improved transposing keyboard for pianos or organs, whereby transposition may be readily and quickly made to any desired key.

In the drawings, Figure 1 is a top planview of a portion of a piano keyboard, with parts broken away to better exhibit my invention, and the same having my invention applied thereto. Eig. 2 is a sectional sideelevation of the same, the section being taken on the line 22 of Fig. 1. Fig. 8 is a detail section, taken on line 33 of Fig. 2.

The numeral 1 indicates the casing of the piano or organ, having the front guide-bar 2 and the rear guide-bar 3 arranged therein, so as to form a track or guideway for the sliding transposing keyboard-frame 1, which slides above the key-levers 5, upon said guideway. The said key-levers 5 are of the usual construction and operation, except that in the present instance ll have shown their front ends cut off a distance, as they would be unnecessarily long if left 'full length. Said key-levers 5 are provided with the usual pivots, at 6, as more clearly shown in Fig. 2. Each of said key-levers is provided upon its upper side with a filling-block 7, for filling in the space between said levers and the underside the overlying transposing-keys carried by the said sliding-frame 4:, which latter I will hereinafter designate as the sliding carriage. he said filling-blocks 7 are preferably tapered from their base upwardly, to make them lighter, and are surmounted by a suitable pad 8 to receive the impact of the said carriage keys. The purpose of the said filling-blocks is to fill in the space between said carriage keys Specification of Letters Patent.

Application filed February 23, 1911.

Patented All, 15, 1911.

Serial Ho. 610,183.

and said key-levers 5, and also to present a comparatively uniform height of filling above said levers, permitting all of the keys of the carriage toslide over and then be depressed into contact with the filling-block of any one of a series of adjacent key-levers, as required during operation. The said sliding carriage a is preferably composed of a rectangular frame, as shown in Fig. 1, and it has a longitudinal pivot-bar 9 near its rear side, to which bar the carriage keys 10 and 11 are pivoted by means of common pivots 12. The carriage may be of suflicient dimensions to accommodate any desired number of keys 10 and 11; that is to say, it may carry a greater or lesser number of keys than the corresponding key-levers 5, and it may have such a length as to overlap by a full octave the said key-levers 5, or it may, if desired, be an octave or less shorter.

13 indicates a guard-bar for the rear ends of the carriage keys 1(), 11, the said bar extending over the rear ends of said keys longitudinally of the carriage at a slight distance above said ends, and having its opposite ends fixed to the end-bars of said carriage, in order to prevent said keys from being accidentally detached from said pivots 12. 14 indicates another guard-bar for the carriage keys, said bar extending longitudinally of the carriage above said keys 10 and 11, and having pads 15 upon its underside to receive the rebound of said keys. :laid bar 14.- also has its ends attached to the endbars of the carriage, and extends over said keys at a point, preferably, just in the rear of the rear ends of the black portions of the said keys 11, although it is evident that it may be located farther back than it is herein shown, depending upon the taste of the builder.

16 indicates the front key-stop rail, which extends from end to end of the carriage 4 near the front thereof, to support the front ends of said keys 10 and 11. Interposed between the said keys 10 and 11 and the said front rail 16 are springs 17, which normally hold said keys in an elevated position with their upper sides in contact with the pads 15 of the upper bar 14. Said springs 17 are held in place by guide-pins 18, which have their lower ends fixed in said front rail 16 and extend up into suitable holes 19 formed in the underside of said keys 10 and 11.

20 indicates a front stop and guide rail for the front ends of the key-levers 5; said rail carrying guide pins 21 which enter suitable holes or recesses 22 formed in the undersides of said key-levers and extending through the same partway into the said filling-blocks 7 carried by said levers.

The operation is very simple, and is as follows: The player grasps the carriage 4L and moves it back or forth upon the guidebars 2 and 8 until the carriage keys 10 and 11 rest above the proper, or desired keylevers 5 and their filling-blocks 7, so as to transpose to any desired key, as required.

What I claim is:

A piano or other musical instrument, fitted with a carriage, guides upon which said carriage slides, a pivot bar on said C?ll' riage, a set of keys pivoted on said pivotsubscribing witnesses.

PAUL BIALIK. Witnesses JOHN F. RUI-ILAND, J OHN C. I-IIeooN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

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