US1188851A - Electrically-operated valve for pneumatic musical instruments. - Google Patents

Description

FA W. SMITH.

ELECTRICALLY GP TED VALVE FOR PIIEUII/IATIC MUSICAL INSTRUMENTS.

NE 24, I915.

APPLICM ION FILED IL! Patented June 27, I916.

Lwesam referir,

Specification of Letters Patent..

Patented June 27, 1916.

Application filed June 2e, 191.55. Serial No. Gfe.

To all whom t may concern.'

Be it known that l. Fnnnnincn lV. SMi'rH, a subject of Great Britain, (who has declared his intention oi becoming a citizen or' the United States) residing at North Tonawanda, county ot' Niagara, and State of New York. have invented certain new and useful Improvements in lllectrically- Operated Valves for Pneumatic Musical Instruments, of which the following is a. specification.

rlhis invention relates to electrically operated valves for pneumatic musical instruments.

My invention relates to that type of electrically operated valve wherein the valve is a disk, under the control of an eectromagnet, and is adapted to control the action of a pneumatic. which in turn, actuates larger valves that control the access of wind pressure of an organ pipe. Valves of this general type normally prevent access of atmospheric pressure to a bellows pneumatic and when attracted Yby energization of the electro-magnet, uncover a port which lets in atmospheric pressure. structed, this type of electrically operated valve has been subject to the very serious defect that small particles or obstructions are drawn in through the atmospheric port or through the wind chest and lodge on the diskvalve or its seat and in the course of time prevent its proper action by keeping it 'from closely fitting its seat.

My object is to provide, in an electrically operated valve oli the ailove-mentioned type, a valve seat and casing of ii'nproved construction which will insure accurate and close seating of the disk valve at all times, despite the ,access ot' any obstructions or dust particles and which will guide the valve, without the necessity of providing special guiding pins or other devices.

The invention is carried out bythe provision, inA connection with a disk valve, of a valve casing having a circular recess slightly larger than the valve which serves as a guide therefor and, further. a circular seat which has a sharp edge and a tapered or4 beveled wall leading Jfrom said edge to the shell or casing. The sharp edge ot' the seat :Nid the beveled wall thereof perform the twofold function ot' preventinglodginent of any obstructions or dust particles and of a knife As heretofore cone' edge engagement with the disk elve, the latter being preferably provided with a paper or leather tacing to cause it to more iriinly engage said knife edge seat and to prevent it trom adhering to the poles ot' the elettro-magnet.

The invention is set forth fully hereinafter and its improved features are recited in the appended claims.

ln the accompanying drawings: Figure Il is a sectional view through a pressure vrind chest showing the application ot' the invention thereto to illustrate its use; Fig.

2. a detail View looking toward the inner" faceot' the outer part of the shell or easing, dotted lines representing the valve; 3, a detail view looking toward the inner Atace of the bottoni plate. showing the poles of the magnet inserted therein, dotted lines representing the valve; Fig. Ll, a longitudinal section through Fig. 2; Fig. 5, a cross section through the valve seat oit' Fig. 2, Fig. G, a longitudinal section through the complete valve mechanisin, parts of the electroniagnet being broken away; and Fig. 7, a detail of the disk valve.

The invention has been shown applied to a pressure wind chest to illustrate its use, but its novelty resides in the features hereinbcl'iorc set forth and not in its combination with such vvind chest.

Referring to Fig. l, the numeral l represents a pressure wind chest from which lead passages, of which only one, 2, is shown, to the organ pipes. Valves 8 and. l carried by a stem 5 and operated by a bellows pneuniatic contained Wit-hin the chamber l, constitute the means 'for controlling the access oi" pressure to passage 2. The electrically operated valve is employed for controlling the access of atmospheric or arti icial pressure to the bellows 6 through the port or passage 7. The valve chest or casing consists ot a bottom plate 8 which .is suitably fastened on top of the wind chest and has a port 9 communicating with the port or passage 7.' Ports l() extend' through the plate 8 and communicate with the space 1l which leads to the interior chamber 1. The electro-magnet 'l2 has its poles 13 eX- tending through the plate S and their upper ends exposed on the. upper face thereof. `A suitable circuit 14 leads to the organ key controlling the particular pipe and'on the 12 is energized and its poles 13 become magnetic.

The parts thus far described are well known and I lay no claim thereto.

My improvement consists in the parts hereinafter set forth.

b'urmounting the plate 8 and suitably depressiin of such key, the electroanagnet connected thereto in any perferred manner is the shell or easingr 15 which may be kept in proper relation to the plate by pins 16. This shell or casing has an air passage 17 which is in connnunication with the port 9 at one end and at its other end it is enlarged and is of circular form, as shown at 18, and Centrally of said circulaipart is a raised and depending circular valve seatI 19 With which an atmospheric port 2O communicates. The said seat has a circular knit'e edge 21 and a beveled or sloping circular wall 22.

The disk valve 23 is of magnetizable mate 'rial and on its opposite sidesis provided with faeings of leather or paper 2l and 25 which are pasted or cemented thereto. The disk valve is of less thickness than the distance between the knife edge 21. and the top of the plate 8 so that it has an adaptability for movement toward the plate 8 when the electro-magnet 12 is energized. The said valve is of slightly sir-aller diameter than the circular guide 18 w h retains and houses it in its niovementa Normally the wind pre sure in. the chain.- ber 1 being in of the atmospheric pressure, the valve is held against its seat and the pressure from the chamber 1 passes through the ports 10 and both holds the valve'against its seat and permits the wind pressure to pass into port or passage andto expand the bellows 6, thus closing; valve 3 and keeping v open so that the passage 2 is vented the key controlling the elentrena-in.. l` is depressed., the nia netiization ot said electro-inag'net attracts the disk valve and it leaves its seat and closes ythe ports l0 and opens port 2Onl whereupon the greater pressure in chamber 1, aeting on bellows 6 collapses said bellows, opening valve 3 and closing valve 4, there upon allowing the Wind pressure in cha1n ber 1 to enter passage and sound the organ pipe communi(uiting,7 therewith. 0n the release of the key, the superior pressure in chamher l, restores the parts to normal pon Sition.

lleretofore particles of foreign material, dust, etc., either from the atmosphere or the .pressure wind chest` have interfered 'with the operation of the disk valve by getting on its"face or its seat, allowing' leakage and otherwise preventing.,r accurate operation.

lith my invention, actualftrsts have shown that this reinediefil which due practically rely to the the valve wall 92 fairrouinlingz said seat. The knife edge prewrits particles troni lodging on the seat and t'iie inclined wall assists i shedding "them, beside whieln the lrnile edge forms a very tight lit with the paper or leather covering;- ol the Valve. The provision oli' the circular valve guif'le oliviates the nemessity of providing special guiding pins or devices such asliave hereto'liinje been employed.

Having` thus described my invention, what I claim new and desire to secure by Letters Patent, is

1. In an electrically operated valve for pneumatic musical instruments, a valve shell having a circular concavity constituting a valve guide, a port communicating with the .central portion ot said eoneavity, acircular knife edge valve-seat risingr coneentrieally within said concavity around said port and having an outer circular inclined wall declining from said lini'lfe edge to the bottoni of said concisa/ily, a free circular magnetizable disk valve located loosely within. the circular eoncavity and adapted to bear against said knife edge seat, said disl; valve being ol'liut slightly `v diameter 'than the eoncavity and adapted to he solely guided, by the walls of said concavity when epenini'g' and closing the aforesaid port, and an eleetrounagnet whose poles are arranged opposite the concavity, saidvalve heing adapted to play between said poles` and said knife edge seat.

2. In an electrically operated valve for pl'ieuniatie musical instrinnents a valve shell having port, an air elianneh, 4a circular eol'ieavity constituting a valve guid s, and a circular linil'e ed -i valve seat rising eoneen within said eonravity having a cirrclined wall deeliniinr e( e the bottoni of said eonravity. Mid valve seat linings iir vom iuniration with the port aforesiid, an elentro-nieguet .whose poles are d said valve shell having a port adju `ent said poles are disguised opposite the valve seat, valve located loosely within the circular eoneavity aforesaid and adapted to hear against said kn e edge seat. said disk valve being of hat slightly less d' fr than the circular conravity and adapted to lie solely guided hy the walls oi said ronravity when openingl and elosinif thi ports aforesaid.

lili. l DNR! CK W. SMIT ll. TWitnesses ll. d. Emmi/rr, (liras. S. (lirios.

l Eil from sa id1 life edge 2l of at and te the tapered i inclined 'posed opposite the valve seat,`

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