US838149A - Fluid speed-governing clutch. - Google Patents

Description

No. 838,119. y PATENTED 11110. 11, 1906. .1. G. 12111111151. FLUID SPEED GQVERNING ULUTGH.

APLIOATIGN FILED MAR. 19, 1906.

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FLUID SPEED G'OVBRNING CLUTCH.

APPLICATION FILED MAR. 19, 1906* 3 SHEETS-SHEET 2.

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J. @.WANDS. PLUID'SPBED GOVERMNG CLUTCH.

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Specification of Letters .Patent Patented Dee. 11. 16de'.

Application tiled March 19, 1906. Serial No. 306.822.

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Be it known that I, JOHN C. WANDs, a citizen of the United States, residing at the city of St. Louis, State/.f Missouri, have invented. a certain new and useful Improvement in Fluid Speed-'Governing Clutches, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and use thesame, reference being had to the accompanying drawings, forming part ofthis specification, in whichy Figure 1 is a longitudinal sectional view through my improved uid speed-governing clutch. Fig. 2 is a fragmentary end eleva- Eig. 3 isa cross-sectional view on the line 3 3 of Fig. 1. sectional view on the line 4 4 ofFifr 1. Figf.

5 o Fig. 4, and Fig. 6 is a diagrammatic view of the piston cam-groove.

This invention relates to a new and useful improvement in a fluid speed-governing clutch designed to be arranged between driving and driven shafts, so as to control the speed of the latter. The driving-shaft has a piston connected to that said piston is capable of reciprocation in a direction longitudinal the driving-shaft, such reciprocation resulting from the rotary movement of said driving-shaft.

The cylinder or casing in which the piston is mounted is connected to the driven shaft, and there are means for regulating the passage of fluid to and `from the ends of the casing through by-passes. Thus if the bypasses for the lluid are choked the piston in its cylinder and consequently the rotary motion of the drivingshaft will be communicated .to the driven shaft. The relative speed of the' driven shaft is proportional to the freed om of movement Iof the piston. When the passageways are fully choked, the driven shaft is positively connected with the driving-shaft, and consequently rotates at the same speed as the driving-shaft.y ways are fully opened, the driven shaft, if it has a load imposed upon it, will.NY remain stationary, Whil e the driving-shaft is rotating at full-speed. The partial closure of the .passage-ways will `impose restrictions upon the liquid displaced by the piston, and,'de

pending upon the degree of restriction, the

d living-shaft will' drive the driven shaft.

Referring to the drawings, 1 indicates the shaft. 'The extreme Fig. 4 is a crossit in such manner walls forming oy-passes Iwith the piston-chamber at 10ct at one. end

When the passagedriving-shaft, which receives motion from any suitable source of power.

2 is the shaft to be driven. On the end of shaft 1 is mounted a piston 3, provided with a peripheral groove 4. This piston has longitudinally-disposed grooves 5 in its bore,

-which receive the ends of a `cross-pin 6, arbranged in the driving-shaft 1.

In vthis manner the piston 8 may move longitudinally the driving-shaft, but is, prevented from independent rotation with respect to said ,end of the drivin shaft 1 is preferably provided with a eentrall -arranged recess, in which fits a stud 7 on t e head-casting 8. This head-casting 8 is provided with a hollow boss on its outer face, in which the driven shaft 2 is pinned. A sleeve 9, surroundin the shaft 1, serves to provide an extended castin and also to space said'head-casting from t e hollow casing 10, containing the bypass ways. This casing 10 is connected by suitable screws to the head-casting 8 and at its opposite end is mounted on the drivingshaft 1, there being provided a ing-shaft pass'es.

1l represents pins 'or projectionsscrewed into the side walls of the casing 10 and held in position by locking-pins 12. The inner enus of `these pins 11 enter the peripheral groove 4 of the piston. Casing 10 is provided with hollow walls, as shown, said hollow which communicate of the piston-chamber and at 10b at the opposite end of said piston-chamber. The openings 10b copcrate with a rotary valve 13, loosely mounted on the sleeve 9 adjacent the head-casting 8. This valve 13 is pro- `vided with a mutilated peripheral flange, so

designed that in one position of thevalveall of the openings 10b moved rotatively the openings 10b gradually opened until fully uncovered.

he'area of the openings 10a and 10b eX- ceeds thearea of the piston-chamber, and consequently the liquid in the ber when the openings 10b stand fully open is free to pass from one side of the ypiston to the other with little or no impedance.

Valve 13, as shown in Fig. 3, is provided with a rack 13a upon its hub portion, which rack meshes with a pinion 14, splined 'to a shaft 15, which passes through a circumferentially-elongated opening of the web of the may be caring for the headpiston-champacking-box around the opening through which the drivare closed, and when -valve 13. This shaft passes through a packing-gland in the head-casting,r 8 and at its outer end is provided with a sleeve portion 16, havingspirally-arranged cam-grooves in f nelly rotary motion willl be imparted to the shaft 1.5, andvalve 13 will be actuated. The .ini-3ans for' moving' the sleeve or collar 17.' lonfg'ituldi'nally' consists of a sliding co'llar 19, cnnec'tedwith the sleeve 17 and coperatinglr "With-ayoke-lever'-20,*fulcrumed on a fixed pivt and carrying a-dog'2l, designed to engage the notches of a segmental rack 22, 'whereby the parts may be' locked inadjusted positions. l

In operation' if the driven shaft 2 isloaded and the lopenings 10F fully opened it will be obvious that the' rotation of the driving-shaft will causeI the piston to reciprocate in its chamber aiidforce the liquid through the openings 1'()u and 10b and. the by-passes with which they'communicate. lll ihe lever 20 is now 'moved so as to partially close' the openings'lOb, itv will' be noted thatthe resistance flered to' 'thc flow of liquid through the openings10h"Will"be transmitted to' the shaft 2, land conse uenltlyl shaft I2 will be ldriv'en, though 'per laps at a slow speed. "If now the gpemngs" vIOUarefurther restricted, the speed the' driven shaft 2 will be proportionately increased. "Should the openings 10b be' fully cl`osed,lthve incompressible li( uid, being inc abible' of displacement, will liold the piston stationary,V and' the shaft 2 will beg'locked tofthe Asima-1` andthe motion f sima 1 transmitted' -with 'its full force and speed to -lthe"shl1`ft`2.v The 'gradual opening of the valve andfincreasing available area of openings' 1'0b Will remove the restrictions upon the flow'f the' liquid from one end of the pistonthainber to the `other and will permit a play of lthe piston, 'which results in a corresponding loss 'lof rs eedjin shaft 2,' this continuing` until' 'the va ve' is fully opened,"when if shaft 2 isca'rrying a' load sufficient to overcome the friction of the piston in its cylinder the said shaft will lie-brought to a position of rest, While shaft ll continues its motion and the piston continues to reciprocate.

Having thus described the invention, 'what is claimed as new, and desired to be secured byLetters Patent, isf-- l 1. AThe combination with a driving and a driven shaft, of a piston mounted on the driving-shaft and capable of longitudinal reciprocation longitudinally with respect thereto, a cylinder mounted onv` the driven shaft in which said piston operates, a byass connecting the spaces at the opposite si es of the piston, and means for regulating the flow of'liquid through said by-pass; substantially as described.

2. The combination with a driving-shaft,v

of a piston slidingly mounted on said drivingshalt and capable of longitudinal movement with respect thereto, said piston having a peripheral groove, a driven shaft, a casingr connected to said driven shaft and containing` a chamber in which said piston operates, a pin on' the casini;` entering the peripheral groove of the iston, and means for controlling the (lowof liquid displaced by the piston; substantially as'described.

3. The combination 'with a driving-shaft, of a piston slidingly mounted thereon, said piston being incapable of independent rotation with respect to .said driving-shaft,- a driven shaft, a casing mounted on the driven shaft and providing a chamber in which said piston '(i'perates, pins or projections carried by 'said casing and 'cooperating With a rcamgroove in said piston, passagesv in the'casing connecting the opposite ends of the pistonchamb'er, a rotary valve for controllingsaid passages, and means for imparting motion to said valve substantially as described.

IIn testimony whereof I hereunto affix my signature, in the' 'presence of two Witnesses, this 14th day ofMarch, 1906.

JOHN C. WANDS.

1Witnesses F. R. CORNWALL,

GEORGE BAKEWEnL.

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