US160605A - Improvement in reed-organ tremolos - Google Patents

Description

J. nl. LU'MAS.

Red-(hganl Tremulo. 10,160,605 Patented March9-1875.

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't'nrrnn STATES A'rnlvr OFFICE.

JOIIN It. LOMAS, OF NEW HAVEN, CONNECTICUT, ASSIGNOR TO BERNARD SHONINGER, OF SAME PLACE.

MPROVEMENT iN REEDnORGAN TREMOLOS.

Specification forming part of Ltters Patent No. 160,605, dated March 9, 1875 application 'ed November 23, 1574.

To all whom t may concern:

Be it known that I, JOHN R. LOMAS, oi' the city and county of New Haven, in the State of Connecticut, have invented a new and valuable Improvement in Trernolo Attachments to Musical Instruments; and that the following specification, taken in connection with the drawings forming a part thereof, furnish a full, clear, and exact description of the same.

Most 'musical instruments of the class of organs and melodeons are furnished with devices for producing ornamental effects, and among these devices is one known as the tremolo attachment. Its object is to make a tremulousness in the musical note, and it is accomplished in various ways. Some instruments are furnished with revolving fans, which produce tremulous undulations in the air, and others are furnished with valves, which produce the tremulousness by rapidly opening and closing an air-passage. My invention has especial relation to the latter class of devices, viz., valve-tremolo. In reedorgans the air to produce the sound is drawn by the bellows through the reeds and con ducted through what are known as the air-passages of the instrument. Valve-tremolos are usually located in one of these air-passages, and so arranged that the air passes through a holein the tremolo device. This hole is provided with a valve balanced by a weight or spring, so that its gravity is almost equalled by the wei glit or spring, and only a slight draft of air is required to open the valve. The current of air as it is drawn by the bellows slightly opens the valve, and the weight or spring closes it, and the rapidly-alternating action of air and weight on the valve produces an intermittent or tremulous sound in the note. The fan -tremolos have come into extensive use because of the liability of these valve-tremolos to get out of order. Prior to my invention it was customary to have a stop or handle by which the lrremolovalve was opened and held, so as to allow the air to ow freely through when no tremolo effect was required. This forcible opening of such a delicatelybalanced valve tended to iinpair its accuracy of fitting, and besides particles of dust or foreign matter drawn in by the draft of air would often lodge on the valve and prevent its closely iitting or perfect action. These objections and the liability to disorder in the valve-tremolo have of late years tended to bring the fan-tremolo into favor and to lessen the use oi the valve-tremolo.

My invention has especial relation to the construction of a valvetremolo which shall ige free from the objectionable defects speci- In the drawings, Figure I shows a top view. Fig. 2 shows a longitudinal vertical section of a valve-tremolo attachment containing my improvement.

V represents the reed-boardor top board of an organ. The space A immediately below it is known as the valve-chamber. rlhere is always an exhaust force in this chamber whenever the bellows is in operation. The air is drawn through the reeds into the chamber A, and passes up through the opening D into the air-tight box Cr. In the bottom orp this box are other holes, O, which lead down to the bellows M, but these holes are shut oft" from the aperture D and the rest ot' the box by the valve-board F and a partition, N. The way in which the air, after passing through the hole D, can get from the box G into the bellows M is by means ot the valve B, which is balanced by a weight, H, or spring, so as to oscillate with the draft ot' air, and let the current low intermittently through the open ing at B and down through the holes O into the bellows. To obviate the danger of disturbing the adjustment ofthe valve by a sudden or forcible opening by a stop, I provide the valve-board F with an extra valve, C. This valve C is not an oscillating valve. It is held tightly in its place by a spring, S, and its use is to allow a free passage from the box Gr to the holes O when the tremolo effect is not desired, furnishing a relief for the valve B. The valve C is operated from the outside by a stop, L. In order to prevent the displacement and leakage of the valveB from foreign substances passing-up the air-passages, I place a ne wire screen or netting, It, across the bottom of the box covering the hole D and the holes O. This screen serves as a protection to both the valve B and the bellows M.

In valve-tremolos made prior to my invention the valve B was usually placed on the under side of the reed-board itself, and could not be repaired Without opening the body of the organ.

In order to have the whole valve mechanism above the reed-board, and thus allow easy removal and adjustment, I place it on top of the reed-board in the box G, raising the valveboard F snfliciently above the reed-board V to allow free action, the air being prevented from passing under the valve-board by the partition N.

Having thus described my invention, I desire it to be understood that I do not claim a treinolo. attachment as my invention; nor do I claim a tremolo-valve as my invention; nor do I make any broad claim to tremolo mechanism 5 but What I do claim as my invention, and dcsire to secure by Letters Patent, is-

l. An air-tight tremolo-box, provided With a horizontal partition, F, on one side of which is a tremolo-valve, B, and on the other a reliefvalve, C, substantially as described.

2. The Wire-screen R, or its equivalent, in combination with the air-passages of a reedinstrument, substantially as and for the purposes described.

3. In an air-tight tremolo-box a secondary or minor box, adapted to inclose a tremolovalve, B, by means of the partitions N and F, or their equivalents, acting in combination with the sides of the larger box.

J. lt. LOMAS.

Vitnesses:

SIEGWART SPIER, NATHAN SPIER.

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