Патент USA US2116040код для вставки
May _3, 1938. G. M. QUAVE 2,1 16,040 PIPE ORGAN Filed Feb. 7, 1956 .un. IIIIIIIIIIIII .\\\\\\\\\\\Y . 2,116,040 Patented May 3, 1938 UNITED STATES PATENT OFFICE 2,116,040 PIPE ORGAN ‘ George M. Quave, West Asheville, N. 0. Application February 7, 1936, Serial No. 62,858 (01. 84-335), 12 Claims. This invention relates to pipe organs and more particularly to means for improving the tremolo effects therein. The tremulant or tremolo is connected by a 5 conduit to the bellows. By its action of rhythmi cally and abruptly interrupting the escape of a large stream of air, the tremolo causes the lid of the bellows to oscillate up and down, and thus produces a wavering or trembling quality in the music being played. The bellows lid should swing in time with the beat of the tremolo, therefore the lid should swing like the pendulum of a clock, freely and uninterrupted to the end of its nat ural excursion on both sides of any given or 15 varying center. If the bellows lid is interrupted in any of its excursions, it is thrown out of step with the tremolo, and‘will presently “cross over” its time, and skip a beat, thus destroying the beautiful effect of the music and tending to stop the tremolo. The valves previously employed to regulate the flow of air into the bellows have been open to the objection that they did not have a free and even movement at immediately below and imme 25. diately above their closing points, and thus seri ously interfered with the action of the tremolo when the organist was playing soft music. The old curtain valve, while it had no ?xed closing point, still did not work perfectly with 30 the tremolo, for the, curtain valve had no posi tive action, but depended on gravity for its down ward movement. The variations in the amount of air rushing under and against the roller caused a variation in the movement of the roller. The 35 action wasn’t quick enough to keep the strings taut, and they would often jump from their pulleys, or cause a swinging motion of the yoke which would affect the free action of the valve. The binding of the cords where they were wound 40 in the grooves at the ends of the roller, and the frequent rubbing of the cords against the holes through which they pass, caused an unevenness in the action of this valve, and prevented its synchronous action with the tremolo. The pivoted disk valve used in the conduit from 45 the blower, is opened by a chain over a pulley, and closed with a weight. It has a rigid closing point. . The hinged ?ap or door Valve, and the con .50 valve, while‘having a positive action, being oper ated by means of a rod from the bellows lid, have the defect of a ?xed and rigid seat at their closing point. When playing the organ on a dry day, when the joints in the organ have shrunk and a quantity of air is escaping, these valves stay at a considerable distance from their seat, and the tremolo may be used satisfactorily with soft music. But on damp days, when the organ is tight, if soft music requiring a very small quan tity of air is played, the valve remains near its seat. Should the tremolo now be turned on, the bellows lid will begin to oscillate up and down. These upward excursions of the bellows lid are often interrupted by the striking of the valve against its rigid seat. This, as explained above, 10 interferes with the action of the tremolo. An object of the present. invention is to pro vide bellows valves which allow an even and free oscillation of the bellows. lid when the tremolo 15 is used. Another object of the invention is to provide an organ bellows with a non-stop type of Valve which will not interfere with the action of the bellows lid when the tremolo is used. A further object is to provide an improved type 20 of valve for organ bellows which will be silent and free acting under all conditions of use. These and other objects‘and advantages of the invention will be apparent from the following speci?cation when taken with the accompanying 25 drawing, in which: Fig. 1 is a fragmentary side view, with parts in section, of an organ which includes a tremolo, a bellows and bellows valve embodying the pres -30 ent invention; Fig. 2 is a fragmentary plan view of the lower wall of the bellows and the valve mounted there 011; . ’ Fig. 3 is a fragmentary perspective view of the 35 bellows valve; Fig. 4 is a sectional view of an organ bellows and another type of the same valve; Fig. 5 is a plan view of the sleeve of the valve shown in Fig. 4; Fig. 6 is a perspective view of the sleeve of the valve shown in Fig. 4; and Fig. "I is a fragmentary sectional view of a modification which omits a separate air box. In the drawing, the reference numeral l iden 45 ti?es a plurality of pipes which are stepped into the beam and slide assembly 2. The air supply to the pipes is through the wind box 3 and trunk 4, and this supply is controlled by keys 5 or pedals, not shown, in the usual manner. 50 The trunk 4 opens into the bellows which may be a box or compartment having a lower Wall 6 and rigid side walls ‘I which are joined to the lid 8 by a ?exible bellows section 9. The bellows is seated upon the air box 10 which receives air 2 2,116,040 under pressure from a blower, not shown, through conduit II. From the bellows opens another conduit l2 which carries the air supply to the tremolo. When this supply is admitted to the tremolo by a slide 13 it passes into wind box l4 through valve 15 into a compartment of the tremolo hav ing a flexible wall l6, and escapes through a vent ll of the weighted lid H3. The parts so far 10 described may be of any conventional or desired design as the exact construction is not a mate rial part of this invention. The bottom wall 6 of the bellows has a large opening 19 in alignment with a smaller open 15 ing or valve port 19' in the upper wall of the intake box. As shown in the perspective view, Fig. 3, the port opening I9’ is of rectangular form is of such length that the piston valve never passes beyond the sleeve during any normal oper ation of the system, i. e., the sleeve is substan tially longer than the range of movement of the piston valve. The valve proper may take the form of a wooden disk 3| which ?ts loosely within the sleeve and. has a ring of soft, tough leather 3|’ secured to its lower surface and projecting so that it comes into approximate contact with the sleeve. The. slight clearance left between the disk and sleeve, possible because some leakage of air into the bellows is offset by the leakage through the organ, forms a noiseless and almost frictionless bearing of air around the piston and 15 allows it to ride perfectly free. The disk 31 is centrally apertured to ?t upon the lower end of and the valve 20 is a rectangular block of wood, ' a rod 32 that is ?xed to a board 33 carried by the with slightly rounded edges, which has a slight bellows lid 8, and washers 34 are arranged be 20 clearance, say about 1/64 inch, around it through tween the clamp nuts 35 to provide air tight 20 which a small quantity of air passes in the closed joints. position of the valve. This is offset by the leak age through the organ, and allows the valve to Both of the illustrated forms of valves operate positively noiselessly with no appreciable fric tion, and admirably perform the function of an organ bellows valve. When the pedals (not 25 move freely. In a bellows having a top wall 25 three feet square, the valve 20 may be, for ex ample, a wooden block about 4 inches wide, 8 inches long and 2 inches thick. The metal rod 2! extends centrally through the valve and is pivoted in a bore which extends through the 30 upper wall of the inlet box It), the ends of this bore being sealed by plugs 22. The valve may, of course, be pivotally mounted in other ways, for example, in a board I 00 secured to the under side of the bellows, and other arrangements for 35 supplying air to the bellows, such as the supply conduit llll, Fig. 7, may be used. A wood block 23 is ?xed to one end of the valve 20 and is bored to receive one bent end of a metal rod 24. The opposite bent end of rod 24 extends through a 40 similar wood block 25 that is ?xed to a plate 26 that is ?xed over an aperture into the top wall 8 of the bellows by any convenient means, not shown, such as screws or cement. The purpose of the aperture in the bellows lid 8 is to allow 45 an entrance for assembling the valve. The rod is ?tted with washers at blocks 23 and 25, and is held in place by cotter pins. The wooden parts that form bearings for the operating rod 24 and the pivot rod 2|, also the edges of the valve 20 50 ‘are lubricated, preferably graphited, to reduce friction and prevent noisy operation. Another form of this valve which has no rigid seat for a stopping point and allows the bellows to oscillate in perfect time with the tremolo is 55 shown in Figs. 4, 5 and 6. The bellows and in take box may be substantially as described above, except that the adjoining walls of the bellows and air box are provided with centrally aligned cir cular openings through which the sleeve 21 of the 60 valve mechanism extends. This sleeve may be formed of sheet metal, for example sheet iron, and it may be conveniently supported in proper position by a ?ange 28 that is secured to the sleeve and has apertures for receiving attaching 65 screws that hold the ?ange in tight engagement with a washer 29 on one of the walls through which the sleeve passes, which wall may be, as is shown in Fig, 4, that of the air box. Both ends of the sleeve 21 are open and the portion which 70 extends into the bellows is imperforate. The lower portion of the‘ sleeve is provided with a plurality of parallel slots 30 which, in the aggre gate, may occupy about one-half of the cylin drical surface of that portion of the sleeve which 75 is positioned within the air box. The sleeve shown) or keys are actuated to open the valves of the organ pipes, air passes to them from the bellows, through the trunk 4, the lid 8 of the bellows sinks and the metal rod carries the valve downwardly. When the valve opens, compressed .530 air enters the bellows and tends to again close the valve as the air pressure acts upon the large area of the bellows lid 8. In addition to this function, which is performed more or less well by all organ bellows valves, both of the illus trated valves perform another very important function, that of freely oscillating in time with the beat of the tremolo. When a large amount of air is withdrawn suddenly by turning on the tremolo, the bellows lid 8 drops quickly, carrying its valve with it. The compressed air rushes from the bellows well into the tremolo, through the open valve I5, forces up lid I8 of the tremolo bellows, which abruptly closes the felt-padded valve IS. The bellows lid 8 then swings upward, carrying its valve. The air trapped in the bellows of the tremolo escapes through vent l1, weighted lid l8 falls, opening valve l5, through which compressed air again rushes from the organ bellows. This action is repeated rhythmically. The bellows lid 8 often swings high enough to carry the valve slightly above its closing point, but as it is impossible'for the valve to seat against a stop surface, the lid of the bellows can com~ plete its upward swing without interruption, and 55 thus beat in perfect time with the tremolo. It is to be understood that the embodiments of the invention shown and described are the pre ferred forms but that the invention contemplates such other modi?cations as fall within the scope of the appended claims. I claim: 1. In a pipe organ, the combination with a plurality of pipes, a bellows, a trunk connecting said pipes and bellows, and an air intake box having an opening in the upper wall thereof, said bellows being seated on said intake box and hav ing an opening alined with said air intake box opening, of a valve controlling communication between said intake box and said bellows, and an 70 operating member for said valve connected to the upper rigid wall of said bellows, said valve being of the non-stop type. 2. A pipe organ as claimed in claim 1, wherein one of the alined openings of said intake box and 75 3 2,116,040 bellows is of rectangular form, and said valve comprises a rectangular member pivotally sup ported in said rectangular opening. 3. A pipe organ as claimed in claim 1, wherein the opening in said air intake box is of rectangu» lar form, and said valve is a rectangular block pivotally supported in the rectangular opening of said intake box. 4. In a pipe organ, the combination with a 10 bellows having a ?oating top wall, and an air intake box below said bellows, said bellows and air intake box having alined openings forming a passage between the same, of a valve in and of smaller size than said passage to leave a leakage 15 opening entirely around said valve when the lat ter stands in closed position, and operating means connected between said valve and the ?oating top wall of said bellows. 5. In a pipe organ, the combination with a 20 bellows having a ?oating lid, and an air box beneath said bellows, of a valve sleeve mounted on the bottom wall of said bellows and extending in opposite directions therefrom, the portion of the sleeve within the bellows being imperforate 25 and the portion within the air box being aper tured, a piston valve within said sleeve for con trolling air ?ow through said apertures, and means rigidly connecting said piston valve to said bellows lid, said sleeve being unobstructed 30 and’ open at both ends and of a length exceeding the range of movement of the piston valve. , 6. In a pipe organ, the combination with an air box and a trunk leading to organ pipes, of a bellows connected between said air box and trunk, 35 said bellows comprising a bottom and rigid side walls joined to a lid by a ?exible wall section, an opening in said bottom wall, a sleeve extending through said opening, an exterior ?ange on said sleeve and seated on said bottom wall, said sleeve 40 being imperforate above said bottom wall and apertured below the same, a piston valve within said sleeve, and means rigidly securing said pis ton valve to the bellows lid. '7. The invention as claimed in claim 6, wherein 45 said valve comprises a disk and a ?exible ring on said disk having a loose ?t within said sleeve. 8. The invention as claimed in claim 6, wherein said valve comprises a disk and a ?exible ring 50 on said disk having a loose ?t within said sleeve; and said securing means comprises a rod secured to the bellows lid and means rigidly attaching said disk to said rod. 9. A pipe organ having an air control assembly of the type including a bellows having a ?oating lid, an air box beneath said bellows, and a valve actuated by said lid to control the flow of air from said air box into said bellows, characterized by the fact that said valve includes a sleeve open at both ends and extending into the air box and bellows respectively, and a piston valve in said 10 sleeve and secured .to said bellows lid. 10. A pipe organ comprising a plurality of pipes, and means for supplying air under pressure to said pipes; said means comprising a bellows having a ?oating lid, an air conduit beneath the 15 bottom of said bellows, a valve sleeve mounted on the bottom wall of said bellows and extending in opposite directions therefrom, the portion of the sleeve within the bellows being imperforate and the portion within the conduit being apertured, 20 a piston valve within said sleeve for controlling air ?ow through said apertures, and means con necting said piston valve to said bellows lid. 11. In a pipe organ, the combination with an air box and a trunk for supplying air to organ 25 pipes, of a bellows between said air box and trunk, said bellows having opposite walls ?exibly con nected to form a chamber of variable size, an opening in one of said walls affording communi cation with said air box, a tubular sleeve extend ing through said opening, a sliding valve in said sleeve, said sleeve being open at both ends and having a perforate and an imperforate wall sec tion located at opposite sides of said opening, and means connecting said valve to the other of 35 said opposite walls. 12. A pipe organ comprising a plurality of pipes, means for supplying air under pressure to said pipes for sounding the same, and key-actu ated means for controlling the flow of air to said 40 pipes; said air supply means comprising a bellows having a lid ?exibly connected to the bottom wall, an air conduit beneath the bottom wall, a trunk opening out of the bellows to pass air to the pipes, a sleeve extending through said bottom wall into the bellows, the portion of the sleeve at one side of the bottom Wall being imperforate and that at the opposite side being apertured, and a sliding valve within said sleeve, and ?xed to said lid, . 50 GEORGE M. QUAVE.