US693198A - Pneumatic motor. - Google Patents

Description

No. 693,198. Patented Feb. ll, I902.

-J-. WIESEB.

PNEUMATIC MOTOR.

(Application filed. Dec. 6, 1900. Renewed Nov. 14, 1901.) (No Model.) 3 Sheets8heet I.

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Patented Fob; -ll, I902. J. WIESER. v PNEUMATIC MOTOR. (App lication fllad Doc. 6, 1900. Ronewad Nov. 14, 1901.;

(No Model.)

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UNITE STATES PATENT OFFICE.

JOSEPH WIESER, or BROOKLYN, NEW YORK, ASSIGNOR OF ONE-HALF TO KARL FINK, or NEWYORK," N. Y.

PNEUMATIC MOTOR.

SPECIFICATIQN formingpart of Letters Patent No. 693,198, dated reiemei 1 1, 1902. Application filed De'eemtera 1900. Renewed November 14. 1901. Serial 11.; 82,221. (No model.)

To (122 whom, it mtty 'covwfln:

Be it known that I, JOSEPH WIESER, a citizen of the United States,residingin New York,

- in the borough of Brooklyn and State of New York, have invented certain new and useful Improvements in Pneumatic Motors, ofwhich the following is a specification.

This invention relates to an improved pneumatic motor for self-playing mechanical musical instruments, the motorbeingso constructed that a multiple of pneumatics, preferably three or more, are arranged in connection with a rotating crank-shaft,suction valvechests, and rotary slide-valves, channels conmeeting said pneumatics with the suction- =chests, so that the pne'umatics are successively exhausted and the power produced'by. the same transmitted to the crank-shaft, so that uniform power is available for .moving the perforated music-sheet of the mechanical musical instrument or forwinding up the same after thesame is played. i

The lHVQHlJlOH'COHSlSlZS of a pneumatic mo- 'tor comprising a series of pneumatics, a rotary crank-shaft, the cranks of which are connected with said pneumatics, stationary valve-chests connected by suction-channels with the main suction-chest. of the musical instrument, said crank-shaft passing through the valve-chests and valves, and rotary slidevalves connected withthe cranks of the crank shaft, said cranksibeing arranged at suitable angles to each other around the shaft, so as to produce the successive actuation of the rotary slide-valves and pneumatics and the transmission of these actuations to the crank-shaft, from which the power is transmitted to the winding-up rolls of the perforated musicsheet, as will be fully described hereinafter, and finally pointed out in the claims.

In the accompanying drawings, Figure 1 represents afront elevation of my improved pneumatic motor. Figs. 2 and 3 are vertical transverse sectionson lines 2 2 and 3 3, Fig. 1.. Fig. 4 is "a section on line 4: 4, Fig. 1. Fig. 5 is an enlarged detail side elevation showing the slide valve and its connection with one of the pitmen or connecting-rods. Fig. 6 is a vertical transverse section on line 6 6, Fig. 5. Figs. 7, 8, and 9 are side elevations of the rotary slide-valve and its pitman,

showing, when taken with Fig. 5, the position of the same at every quarter part of a rotation. Fig. 10 is a verticaltransverse section on line 10 10,.Fig. 8. ,Fig. 11 isa perspective View looking toward the inside of the slidevalve; and Figs. 12., 13,'and 14 are respectively a vertical section on line 12 12, Fig. 1, a plan View, and a vertical section on line 14. 14, Fig. 12, of the speed-regulating valve by which the suction action of the main suctionchestonthe pneumatics is regulated.

Similar letters of reference indicate corresponding parts;

Referring to the drawings, A represents the supporting board of my improved pneumatic motor. This. board may be arranged in horizontal, vertical, or any other suitable position, according to requirement. A number of powerneumatics B are attached to the supporting-board A, there being, preferably, three pneumatics for each motor. The movable member of each pneumatic is connected by a pitman or connecting-rod C with a crank C on the driving-shaft S, said cranks C being arranged'on the shaft S for three pneumatics at an angle of one hundred and twenty degrees to each other, so that each pneumatic produces motion for one-third of the rotation of the driving-shaft S. Theshaft S passes through valve-chests D of rotary slide-or disk valves F, which are suitably fixed to and arranged below the supporting-board A, each valve-chest being connected by a channel at with the interior of the power-pneumatics and by a second channel e with the. suctionchest E, that is connected with the well-known main suction-chest of the mechanical musical instrument, which main suction-chest exerts a constant suction action on the suction-chest E and the channels and pneumatics-connected therewith. Each crank C of vthedrivingshaft S is provided with a slotted or bifurcated end, which is clampedloy screw 0* loosely on the crank-pin d on the crank of- ICO into an arcuate or elongated recess f in the under side of the valve F, but diametrically opposite the recess f. The rotary slide-valve F is provided at a point opposite to its point of connection with the pivot-pin d of the crank C with a second socket-hole (1 similar to the one in which the pin is inserted, but which is hid from view, so that the pivot-pin d of the crank C can be connected with one or the other of the opposite socket-holes in the rotary slide-valve, according as the pneumatic motor is to be run in one or the opposite direction. This is readily adjusted when the parts of the pneumatic motor are assembled and the same properly connected with the parts of the mechanical musical instrument with which it is used.

The valve-chest is provided with a projecting circular portion D, of approximately the same size as the rotary slide-valve F. The opening f, recess f and recessesff move over a segmental opening f and two segmental openings f in the projecting portion D of the valve-chest, said openingsf f' communicating, respectively, with the angular channels cl and e, that communicate with the power-pneumatics and suction-chest E, as shown in Fig. 2. When, therefore, the driving crank-shaft is rotated, the powerpneumatics will follow, by reason of their connection with the cranks, successively one after the other the motion of the cranks. This produces the passage of the opening f and recess f over the openingj' (see Figs. 8 and 10) and by the simultaneous actionof the crank and pitman of the pneumatic the expansion of the pneumatic, so that atmospheric air is sucked therein. By continuing the motion of the driving-shaft the recesses f of the valve are placed out of register and connection of the interior recesses ff with the openingsf f established, so that the air in the pneumatics is placed under the suction action of the si1ction-chestE,wliich produces the immediate collapse of the pneumatic, and thereby the impulse of the same on the crankshaft. These two positions of the rotary slide-valves are shown, respectively, in Figs. 8 and 5, the intermediate positions in Figs. 7 and 9 showing the position of the slidevalve relatively to the ports of the stationary valve-chest, during which, except as now to be stated, no connection between the suction-chest and pneumatic is permitted. The various phases of motion which take place will be clearly seen from Figs. 5 to 10, as suming that at the first phase the pneumatic is being collapsed. In the position shown in Figs. 5 and G suction will be exerted by the suction-chest E, through the channel e, openingsf, recesses f f, opening f and channel or duct (Z on the pneumatics, thus collapsing the latter, and this motion is interrupted as soon as the valve has been rotated into the position shown in Fig. 7, in which position the recess f of valve F has passed the opening f in the valve-chest. Arriving in this position, the recess f in the valvemeets the opening f in the valve-chest, so that while the valve is moving through the position shown in Fig. 8 and to about the opposite position in Fig. 9 the suction is shut off and atmospheric air passes through the opening or portf, recess f openingf and channel cl to the pneumatic, so as to expand it. On arriving at the position shown in Fig. 9 the recess f communicates with openingf so that suction is exerted on the pneumatic, this suction continuing until f has passed opening f As the action of the various pneumatics takes place successively in the form shown, one at each one-third rotation of the driving-shaft, three actuations of the pneumatics are produced for each rotation of the shaft, so that rotary motion is imparted thereto by the impulses imparted to the same by the pneumatics, which motion of the driving-shaft is transmitted by a pulley and belt to the pulleys on the shafts of the unwinding and winding-up rolls of the musicsheet, so that the same can be either unrolled or rewound on its roll, according as the belt is shifted to one roller-shaft or the other.

The speed of the motor is regulated by means of a speed-regulating device which is arranged at one end of the suction-chest E, so as to control the suction action. This regulating device is composed of a stationary casing H, fixed to the suction-chest E and having a D-shaped interior cross-section, and a slide-valve h, provided with openings it, that register with openings 72, in the stationary D-shaped casing, and openings 0, leading to the suction-chest E. The slide-valve 7b is provided with a stem h that passes through the casing and has a button or handle 72. at its outer end and so that it can be moved in its casing to open the openings leading into the suction-chamber E to a greater or less extent, so as to regulate thereby the suction action exerted on the valve-chest and the powerpneumatics l3. \Vhen the openings h in the slide-valve are in full register with the openings in the stationary casing, the full suction action is exerted on the pneu matics,aud there by the greatest speed imparted to the pneumatic motor, while when the openings in the slide-valve are placed partly out of register, so that the communicating openings between the suction-chest E and main suction-chest are reduced in size, the speed of the motor is correspondingly reduced until by the nonregistering of the openings in the slide-valve with the openings in the suction-chest the total interruption of the functioning of the motor is produced.

The advantages of my improved pneumatic motor over the motors heretofore in use in which the valve action is produced by a reciprocating slide-valve are, first, that the rotary motion of the slide-valves is accomplished with greater smoothness, so that the dead-points are overcome easier, while the successive action of the pneumatics on the driving-shaft at three or more points of its rotation produces the effective rotary motion of the slide-valve without any dwells or jerks of the same. Another advantage is that the motor can be so adjusted as to be run in one or the other direction, which may be of adbut, if desired, a special spring may be inter-' posed between the rotary slide-valve and crank adjacent thereto, so as to hold the valve always in position on the face of the valve-chest. 'Another advantage is that the connecting rods between the cranks and crank-shaft and pneumatics can be readily disconnected from the crank-shaft by loosening the split or bifurcated end of the same, so that the connecting-rods can be slid over the wrist-pin of the crank and be easily replaced thereon and tightened up when they are reconnected with'the cranks.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. The combination, with a plurality of stationary valve-chests, a suction-chest con nected therewith, and an equivalent number of pneumatics also connected with the valvechests, ofa crank-shaft connected with the movable members of the pneumatics and.

passing through the valve-chests, and rotary valves fixed at suitable intervals apart on said shaft and working'each on .one face of each of the valve-chests, said valves and admit air and shut it off from the pneumatics, substantially as set forth.

valve: chests being constructed toalternately 2. The combination, with aplurality of stationary valvechests, each constructed with suitable openings, a suction-chest connected directly with one of the said openings, and. an equivalent number of pneumatics con nected directly with the other of said open-v ings, of a crank-shaft connected with the movable members of the pneumatics and passing through the valve-chests, and rotary valves on said shaft, working each on one face of each of the valve-chests, each valve being provided with an air-inlet opening and constructed with a recessed inner face, substantially as set forth.

In testimony that I claim the foregoiiig as my invention I have signed my name inpres ence of two subscribing witnesses.

Witnesses:

PAUL GoEPEL, M. H. WURTZEL.

JOSEPH WIESER;

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