US786899A - Coin-controlled actuating mechanism for autopneumatic pianos. - Google Patents

Description

PATENTED APR. 11, 1905.

A. J. HOBART. COIN CONTROLLED AGTUATING MECHANISM FOR AUTOPNEUMATIG PIANOS.

APPLICATION FILED JULY'll. 1904.

2 SHEETS-SHEET 1.

h c'lrzsses MW? MM PATENTED APR. 11, 1905. A. J. HDBAR-T. COIN CONTROLLED AGTUATING MECHANISM FOR AUTOPNEUMATIG PIANOS.

APPLICATION FILED JULY 11. 1904.

2 SHEETSSHBET 2.

No. 786,899. v Patented. April 11, 1905.

UNITED STATES PATENT OFFICE,

ADAM J. HOBART. OF ST. JOHNSVILLE, NEW YORK, ASSIGNOR TO ROTH AND ENGELHARDT, OF NEW YORK, N. Y., A FIRM.

COIN-CONTROLLED ACTUATING MECHANISM FOR AUTOPNEUMATIC PIANOS.

SPECIFICATION forming part of Letters Patent No. 786,899, dated April 11, 1905,

Application filed July 11, 1904. Serial No. 215,989.

To all whom it may OOH p with bellows p located in a chamber 9 of 5 Be it known that l, ADAM J. HOBART, a citia vacuum-chest P. The other chamber, 7)", zen of the United States, residing at St. J ohnsof the vacuum-chest has a vent p and contains ville, Montgomery county, State of New York, a valve 71", carrying a pin 12, adapted to bear have invented new and useful Improvements upon bellows p. The chamber 9* communiin Coin-Controlled Actuating Mechanism for cates by a pipe a with suction-bellows a, se- AutopneumaticPianos, of which the following cured to frame ,0 opposite lever f. To the is a specification. movable board of bellows a is secured a plun- This invention relates to improved means ger m, that passes through a perforation g of I for starting an autopneumatic piano or pianoframe g and is adapted to engage the back of player by the introduction of a coin and for switch-knife 2". oo arresting the same after the piece has been The operation is as follows: When the leplayed. ver f is tilted by the introduction of a coin 1n the accompanying drawings, Figure 1 is in the manner described, it will release knife 5 a front elevation of my improved eoin-conand the latter will by its spring 9: be swung trolled actuating mechanism; Fig. 2, a detail to close the switch. This will start the elec- 5 front elevation of the switch, showing it open; tromotor, the current traveling as follows: Fig. 3, a plan; Fig. 4, a side view thereof, and From source of electricity A through wire 0, Fig. 5 a detail cross-section through the vacucontact 7', knife '17, contact 7;, wire 0', electro- 20 urn-chest and tracker-bar. motor 5, and wire 0 back to source A. \Vhcn The letter (t represents the power-shaft of the end perforation of the music-sheet regisan autopneumatic piano or piano-player, which ters with the duct 0 of the tracker-bar, which receives its motion from the driving-shaft b is made in addition to the hammer-operating of an electromotorb by pulleys 5 c and ropea ducts, air is admitted throught duct 0' and the 2 5 c is the tracker-bar or ductbridge, and (Z tube p into bellows p to expand the same.

the feed-roller for the perforated music-sheet, This will open valve 7) by pin 7) and will all as usual. close vent 2). From the vacuum-chamber 7) In order to start the electromotor by the in air is constantly withdrawn by a pump, (not trod uction of a coin and arrest the same after shown,) and thus the opening of the valve 7) 0 a piece of music has been played, I have dcwill cause a suction in chamber and convised the following construction: 6 is the coinsequently through tube a in bellows w to col 8O chute, and f a two-arm lever, which is fullapse the latter and project plunger m against crumed to a frame g at f and is provided switch-knife a. The means above described with a coin-restf below chute 0. hen a for establishing communication between the 3 5 coin is dropped into the chute, it will fall upon exhaust-pipe 92. and the vacuum-chest P upon rest f to tilt lever f and will then drop into the registration of the perforations in the 5 a cash-box 71/, after which the lever f will be duct-bridge and the music-sheet are the same returned to its normal position by aspringf. as described in Patent No. 74:1,072, granted dis a switch-knife pivoted to frame g at 2' to A. 1. Roth October 13, 1903. By the 4 and havinga notch i that is adapted to be enmotion of the plunger 11/. the switch will be gaged by a hook f of lever f. The switchopened to arrest the electromotor, and the 9 knifeis influenced by a spring 71, which tends switch-knife '5 will become reengaged with to throw the same into engagement with the hook f of lever f. The perforation in the contacts 17s of a switch which is mounted upon music-sheet having passed the perforation c 45 an insulator Z of frame 9. of duct-bridge c suction in pipe or ceases and The tracker-bar 0 has a duct 0 adapted to the bellows n is expanded by its spring a to register with a corresponding perforation of withdraw plunger m. The parts are thus rethe music-sheet at the end of the piece to be turned to their normal position (shown in Fig. played. The duct 0 communicates by a tube 1) ready for the introduction of a new coin.

What I claim is In a ooin-controlled actuating mechanism for autopneumatic pianos, the combination of a tracker-bar having a number of ducts 5 with a vacuum-chest connected to one of said ducts, an exhaust-pipe communicating with the vacuum-chest, bellows communicating with the exhaust-pipe, a plunger connected to the bellows, a switch-knife adapted to be I0 engaged at one side by the plunger, a coincontrolleol lever adapted to engage the other side of the switch-knife, a switch, and a mo tor in circuit, substantially as specified.

Signed by me at St. J ohnsville, Montgomery county, New York, this 7th day of July, I 5

ADAM J. HOBART. l/Vitnesses:

HENRY .H. CARROLL, XVALTER L. ENGELHARDT.

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