US929593A

US929593A - Speed-control mechanism for air-motors.

Info

Publication number: US929593A
Authority: US
Inventors: Nelson D Hosley
Original assignee: Wilcox & White Co
Current assignee: Wilcox & White Co
Priority date: 1909-02-10
Filing date: 1909-02-10
Publication date: 1909-07-27
Anticipated expiration: 1926-07-27

Description

N. 1). HOSLBY. SPEED CONTROL MEGHANISM FOR AIR MOTORS.

APPLICATION FILED FEB. 10, 1909 2,593, Patented July 27, 1909.

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' load whom ill-mag} concern:

. NELSON D. 'HOSLEYQCF MEBIDEN,

oonnnoriounnssreiion TO WILCOX & WHITE :COMPANY, ornnamnmoo NEeTioUT, a CORPORATION or eonnno'rreur.

' smash-common Mnonnnrsiu its era-morons Be it known that I, NELSON D. H osL-nY, a

"citizen of the United States,

; useful Improvements inSpeed-Control Mech- "anism for Air-Motors, of which thefollowing w Meriden, county of-New Haven, State of 1 Connecticut, have inventedcertain newand afu'lhclear, and exact description.

, My invention relates Inechanism for air motors, and is particularly 2 though not aiiism ,ofthis character which is adapted for to speed control exclusively concerned .With mechuse with theair'motorsiof auto-pneumatic 1 musicplaymg mstruments.

this purpose, by means of a. so-called speed controlboxg.

permitted ronome lever does notalways correspond In constructions such. control has been effected "connected with the air motor,- and having an exhaustexit controlled by a so-called metronome valve. This valve usually consists of a slot of graduated widthjin one Wall of the.

ly controlled by' the metronome lever ismounted. While such valve mechanism is speed box over which the slide plate adjust-, a

adequate and efficient. for ordinary purposes of control, it is found'that this construction does not admit. of-the very fine gradations in speed essential to the effective and correct I rendering of the tempo of music by auto-- pneumatic music playing instruments, for, y reason of variations in the size of the slot caused by contraction or expansion of the walls of the speed control box, and to imperfeet adjustment of the slide plate, the speed by a given adjustment of the met- I exactly with the tempo indicated" upon the travels.

scale over which said metronome lever My invention aims to overcome these difiioultics by providing in connection with a metronome valve, adjusting means whereby the exhaust opening due to a given adjustment of the valve may be regulated to the finest possible degree, of the motor may at all times correspond preciselywith the gradations indicated on the metronome scale.

A further object of the inventionis to so construct saidadjusting meansthatthe area of the valve opening may be regulated independently for each'tempo desired.

-With* these and other objects in view, the invention consists in the construction and arrangement of parts, a preferred embodiment specificationof'Letters Patent.

residing at in Fig. 1.

heretofore employed for v in order that the speed Patti-ma 2'2", recal Application filed. February 1o, 909. seria no. 4mm.

of which is illustrated in the accompanyhig drawings, in which:

Figure 1 1s aperspective view of a speed control box of an auto-pneu1natic music playing instrument showing the connection so of themetron'ome lever therewith. Fig. Zia an enlargedview of certain parts illustrated:

Fig. 3 is a plan view of-the carts shown in Fig. 1, and rig. t is a vertical-see tional view taken transversely of the speed box and-through the valve and regulating means therefore. l i

The embodiment of my invention herein selectedforillustration com rises the speed";

form, can

box 1, which may be of usuaat its rear the exhaust chamber 2 and also a connection 3 leading to the air-mete Upon the rear wall of the box ismou'nte block or plate 4 having a plurality of vah' e openings 5 which communicate withthe en' 5 ballet-chamber 2. Over the openings sis slidably mounted the valve plate 6 carriedsuitable guides 7, which plate isconnect, with the usual'metronome lever 8 by a rod. 9.

10 .indicates a metronome scale over which? so the metronome leveri is arranged to he man ually adjusted by the operator. 1 Each of the valve openings 5 may, if the sired, be of slightly greater area than that necessaryto permit of the required speed oi 8 5 the motor, andsaid valve'openin s are ar ranged to be successively opened by move; men't o f the valve plate '6' to the right, as. shown in Fig. 1, so that as a greater'nuinber of valve openings are imcovered, the speed of the motor will be increased. In order to regulate the area of said valve openings, and to com ensate for any variations which may take place therein, each of said openings is controlled by an adjustable screw plug 11, which may be adjusted across the corre s onding opening and diminish or increase t e area thereof, as desired. the construction herein illustrated, the valve opening 5 to the left, Fig. 1, is of a size or area ap- 10 proximately -to produce the tempo adagio 1n the playing instrument. The next opening above and to the right, when uncovered in addition to the first-opening permits in conjunction w'vith the first opening, of a speed lea to produce the tempo .andantino, and each successive opening to the right in conjunction with those previously uncovered permits of the'speed'corfesponding to thetempos "and,ante, moderate, etc. 1.16

case the tempo produced by the uncovering of a given opening or openings does not correspond precisely with that indicated by the position of the tempo lever 8 over the tempo scale 10, the corresponding valve opening 5 may be reduced or increased in area to bring the tempo to the desired point by means of adjusting one or the other of the regulating screws 11. It Willbe seen therefore that the adjustment of the valve openings may be made inde endently for any given speed or tempo an that the regulation of the speed may be carried to the finest possible degree.

' WhileI have herein described a particular embodiment of my invention, it is to be understood that the same may be varied in details and relative arrangement of'parts without departing from the spirit or scope thereof.

What I claim is:

1. A speed control mechanism for air motors comprising a valve opening, a sliding member adjustable over said opening, and means to vary the area of said opening at difierent points throughout its extent.

2. A speed control mechanism for air motors comprising a valve, having a plurality of openings, a sliding member adjustably mounted over said openings, and means for independently varying the area of each ofsaid openings.

3. A speed control mechanism for autopneumatic music playing instruments comprising a speed box, a motor connection therewith, an exhaust chamber, a valve interposed between said speed box and exhaust chamber, a sliding member controlling said valve opening, a metronome lever for controlling said sliding member, and means to vary the area of the valve opening at different points throughout its extent.

4. A speed control mechanism for autopneumatic music playing instruments comprising a speed control box, a motor connection communicating therewith, an exhaust chamber, a valve interposed between said box and exhaust chamber and comprising a plurality of valve openings, a sliding member :u'ljustably mountcd over said openings, a metronome lever controlling said sliding mcmbcr, and means for independently varying the area of said valve openings.

A speed control mechanism for autopnennmtie music playing instruments comprising a speed control box, a motor connection communicating therewith, an exhaust chamber, a valve interposed between said box and said chamber and comprising a plurality of valve openings, a sliding member 'adjustably mounted over said valve openings, and means for independently varying the area of each of said valve openings.

A. G. KUIIULE, FRANK C. W nrrn.