US351873A - linlet - Google Patents

Description

-, 2 Sheets-Sheet l. C. M. LINLEY 8u J, BIGGS. SPEED AND POWER GEARING POB. VELOGIPBDBS.

No. 351,873. Patented Nov. 2, 1886.

(No Model.)

N. PETERS. Yhulbihognpher. Wnihngion. D.C.

(1r-Modem 2 sheets-sheet 2.

G. M. LINLEY 8v J. BIGGS. Y

SPEED AND POWER GEAEING FOE'VELOGIPEDES.

Patented Nov. Z, 1886.

N. PETERS Plwtcruxhagrnphr. washington. DA C,

UNITED STATES PATENT OFFICE.

CHARLES MONTAGUE LINLEY AND JOHN BIGGS, OF SOUTHWARK, COUNTY OF SURREY," ASSIGNOBS OF ONE-HALF TO GEORGE GRAINGER TANDY, OF CEDABS ROAD, OLAPHAM, ENGLAND.-

SPEEDAND'POWER yGEARING FOR VELOCIPEDES.

SPECIFICATION forming part of Letters Patent No. 351,873I dated November 2, 1,886.

Applicationl filed August 18,1886. Serial No. 211,220. (No model.) Patented in England February 1, 1884, No. 2,547, and iu France November 10, 1885, No. 165,280. V

To all whom it may concern: p I

Be it known that we, CHARLES MONTAGUE LINLEY, engineer, and J onN Brees, engineer, both of Melior street, Southwark, in the county of Surrey, England, have invented Improvements in Speed and Power Gearing, of which the following is a specification.

' This invention relates more particularly to a speed and power'gearing for velocipedes, but it is equally applicable to machinery generally; and it consists,'essentially, in a novel construction of expanding chain wheel, the action of which may be produced direct from the shaft on which the wheel is mounted.

In carrying out ourinventiom We employ two disks, in the inner face of each of which` we form a volute groove, in which work the joint-pins of a short length of ordinary driving-chain, the two disks being mounted at suitable distances apart on a shaft with the chain between them; and in order that our invention may be properly understood, we will proceed to describe it in connection with a tricycle, reference being had to the accompanying drawings, in which- Figure 1 is a side elevationof aportion 'of a tricycle (the near wheel being removed) with our invention adapted thereto. Fig. 2 shows the inner face of oneof the disks with the chain in the contracted position. Fig. 3 is an edge view of the chainfwheel. Fig. 4t is a detached view of the chain-wheel with means for holding the chain, and Fig. 5 is an edge View of the same. Y

A is the framing of the vehicle, whichvmay be of any convenient construction and adapted either for a front or rear steerer. v

B is the main axle, which carries the framing in any suitable manner.

O is the crank-axle or treadleshaft, which is mounted in suitable bearings secured in any convenient ina-nner to the framing A; and D is the driving-pulley on the main axle B.

The improved speed and power gear consists of two disks, E E', (see Figs. 3 and 5,) each of which is formed with a volute groove, a, on its inner face, as shown at Fig. 2. The two disks E E are keyed on the crankaxle C, so'

that the two grooves face each other and exactlyv correspond.

Between the disks is placed a short length of chain, b, which is constructed in a manner similar to the ordinary driving-chain for velocipedes, except that the joint-pins are prolonged on either side of the chain, so as to enter and work in the grooves a of the disks. To avoid unnecessary friction, we may mount on the projecting ends ol' thejoint-pins of the chain b small anti-friction rollers. lf,`now, the outer end of the chain be held fast and the disks be rotated, the chain, under the induence of the grooves, will be caused to expand until it assumes the position shown at Fig. 5

'and in dotted lines at Fig. 4, and the diameter of the wheel will be Vthereby increased. By rotating the disk in the reverse direction, the chain being still held rmly at its front end, the chain will be coiled up, as seen at Fig. 2. The means which we prefer to use to hold the front end of the chain will now be described. Y g

Projecting radially from and mounted loosely on the treadle or crank-shaft O, outside oue of the disks, is an arm, c, to the outer end of which is pivoted, at or near the bend, one arm, d, of a U-shaped piece, which fits over one 'of the disks. The other or inner arm, d,'of this U-piece is attached in any covenient manner to the forward or outer end of the chain b. (See Figs. 2 and 4:.) The arm d, which is thinned down to act as a iiat spring, is provided, first, on its under or inner side with a locking-pin or stop, e, which is arranged to enter a series ot' holes, f, made in the disk E, and serves to lock the chain and disks together, and, second, on the outer or upper side with a beveled bridge-piece, g. An arm, h, which is mounted loosely on the treadle or crank-axle, passes through this bridge-piece g, and is so arranged as to come into contact with a movable stop, i, when the latter is thrown into position. This stop i is placed at one end of a lever, j, which has its fulcrum on the frame, the other end being connected by a link, la, to azvertical rod, Z, provided with a handle, m, which is secured in any convenient mannerwithin reach of the ridcrs hand, so that it may be raised or lowered, as desired, to throw the stop t in or out of action; but any other suitable means may be employed to actuate the stop t. When the stopt' is out of action, the chain will be locked to the disks by means of the spring pin or stop e entering one of the holesfin the disk E, and the locking mechanism will rotate with the disks; but on throwing the stop into action, as shown by dotted lines in Fig. 4, the rotation of the arm hwith the disks will be arrested, andthe arm striking against the beveled portion of the bridge-piece g, which,with its arm d, continues to rotate with the disks, (being locked thereto by the pine,) will draw the pin c out of thehole in the disks and allow the pair of disks to rotate with the shaft'irrespective of the chain and its holding mechanism, so that the chain, under the influence of the volute grooves, and being rmly held by the arm d ofthe U-piece,\vill be expanded or eontracted,according to the direction in which the shaft C is rotating.

The holes in the disk E will be arranged to correspond to the grooves,and they are formed 'at regulated intervals, which will admit of the diameter of the expansible wheel being enlarged or contracted to any size within certain limits.

The means above described for holding the chain irrespective ofthe disks and for locking the chain to the disks, and also for actuating the stop 71, are, however, capable of modification without departing from the essential features of our invention-viz., making an expansible wheel or pulley of two volute-grooved disks with a chain having prolonged joint-pins working between them in the grooves.

Then adapting the expansible wheel to veloeipedes, we form the driving-chain G of the vehicle of links shaped somewhat like a flattened U, which are pivoted together at their ends in any convenient manner, so that the connected ends of two links shall enter between the joint-pins of the chain b of the chain wheel or pulley E E. as clearly indicated in Fig. i. The chain G must be of sufficient length to pass round the chai n-wheel E E', when of the largest diameter, the slack -caused by the reduction in the diameter of the wheel being taken up by any convenient means-such, for instance, as atension-spring or a weighted lever pivoted to the frame, and carrying a pulley or roller round which the chain passes, or as shown at X Y Z, Fig. 1, X being a spring, Y a lever, and Z a pulley.

Either or both of the chain-wheels of the velocipede may be made expansible; but, in genera-l, we prefer that the chain-wheel on the treadle-shaft only shall be expansible, as it is more convenient to operate. The chainwheel on the driving-axle will be of a construction suitable to receive a driving-chain of the character above described.

In adapting the pulley to driving machinery generally, astcel band may be'secnred to the chain; or the chain may be replaced by a band, pins being secured transversely to the under side of the band in any convenient Inanner, and at suitable distances apart, so that they may work in the grooves of the disks.

Having now described our invention, we declare that what we claim is l. An expansible wheel or pulley, consisting, essentially, of a pair of volute-grooved disks, E E, and a short length of chain or band, b, the joint-pins of the chain or the carrying-pins of the band being prolonged to work in the grooves, substantially as herein shown and described.

2. In an expansible wheel or pulley, the

Soy

vcombination of a pair of volute-grooved disks,

as E E, and a short length of chain having prolonged joint-pins or a pinned band, as b, with means for holding the forward end of the chain or band against the rotation of the disks, whereby the chain or band is caused to expand or coil up, according to the direction in which the disks are rotated, substantially as herein shown and described.

3. The combination of a pair ol' volutegrooved disks, as E E', mounted on an axle or shaft, and a short length of chain having prolonged joint-pins or a pinned band, as b, with an arm, e, mounted loosely on the same shaft, and an arm, d', pivoted to the arm 0, and to the forward end of the chain or band, substantially as and for the purpose set forth.

4. The combination ot' a pair of grooved f disks mounted on an axle or shaft, a short length of chain `having prolonged joint-pins or a pinned band, an arm, c, mounted loosely on said shaft, an arm, d, pivoted to the arm c, and also to the front or outer end of the chain or band, withan arm, d, formed in one with the arm d', and carrying on its under side a pin, c, arranged to enter a series of holes in the disk E, whereby the disks and chain or band are locked together, substantially as described.

5. The combination, with the arm d, having on its under side a pin, e, of a beveled bridge-piece, g, an arm, h, mounted loosely on an axle or shaft, C, and a stop, as i, suitably carried, so as to be thrown into and out of gear, whereby the pin e is drawn out of the holes fin the-disk E, as and for the purpose set forth.

6. The combination of a pair of grooved disks, as E E, and a short length of chain having prolonged joint-pins, as I), with adriv ingchain, as G, formed of flattened U-shaped links, the ends of which are pivoted together, and arranged to enter the links of the chain b, substantially as described.

CHARLES MONTAGUE LINLEY. JOHN BIGGS. Vitnesses:

H. K. WHITE, A. S. BIsHoP, Both of 6 Breams Buildings, London, E. C.

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