US620074A - Gearing - Google Patents

Description

No. 620,074. Patented Feb. 2|, I899. R. w. JAMIESUN.

I GEABING.

(Application fllad Jan. 17, 18 98.) (No Model.)

Witnesses.

. Inventor.

Attorney;

rrrrsn STATES ROBERTW'. JAMIESON, or noonnsrsa, NEW YORK.

sesame.

SPECIFIGATIQH forming part of Letters Patent No. 820,074, dated February 21, 1899.

Application filed January 17, 1398- Serial Ho. 666,941. (No model.)

To all whom it may concern.-

Be it known that I, ROBERT W. J AMIESON, of

Rochester, in the county of Monroe and State My present invention relates to angle-gear ing, and particnlarlyto that class embodying wheels or disks having pins or rollers project-.

ing from the face'thereof approximately parallel with the axis of-rotation-snch, ,fpr instance, as shown in my Patent No. 596,884,

dated January l, 1898; and it has for its ebject to iinproye and simplify their construction,whereby light rollers and supportingpins may be employed Without sacrificing strength; and to these and other ends it consists in improvements hereinafter described, the novel features being pointed out particularly in the claims at the end of this specification.

In the drawings, Figure 1' is an elevation of a pair of gears constructed in accordance with my invention; Fig. 2, a similar view looking from the right side of Fig. 1-, with a portion of one gear broken away to show the engagement of the rollers or teeth; Figs. 3 and 4, detail sectional views of modifications.

Similarreference-numeralsindicate similar parts. i

The gearing embodies two wheels or disks l l, rotatable on axes 2 2, arranged at an angle relatively, cachdisk'having projecting from its face a seriesof pins 3, secured in any suitable n1anner,as by insertin g them through apertures in the disks and upsetting their; ends, or, if desired, the pins mightbe threaded and secured by nuts. Mounted loosely upon the pins 3 are the rollers 4, constituting the engaging surfaces or teeth of the gears, said rollers being each preferably a truncated sine conoid or solid of revolution described by the I peripheries or engaging surfaces'of the coopcrating rollers or teeth on the other wheel. The enter ends of the pins 3 are connected to fingers 5, formed ntegral with a ring-plate 6, rigidly secured to the face of the disks '1 by rivets 7, as shown, or otherwise. In the preferred construction the ring-plate is in contact with the face of the disk close up to the base of the rollers, and the fingers extend upwardly away from the disk and parallel with.

the pins 3, and the upper ends are bent over substantially parallel with the disk and being perforated are secured to the pins by passing the latter through the perforations and spreadingthelrcnter ends or otherwise. From this construction it will be seen that c0rnparatively light pins 3 may be employed for the rollers, both ends being firmly held and braced against lateral strain, and as the disks may be made of cast metal and the plate of stamped steel the cost of the gear will. be comparatively slight.

Instead of extending the fingers on the ringplate 6 at right angles to the face of the disk, as in Figs. 1 and 2,1 may extend them at an angle, as in Fig. 3, or, if desirable, the outer portion of the disk 1, on which the roller-pins are secured, may be offset, as in Fig. 4, for half the height of the rollers,and the fingers on the plate 6 may be correspondingly shortened and secured to the face of the disk, as before described.

The faces of. the rollers are so curved and correlated that they will cooperate to trans mit power from one gear to the other with the minimum amount of friction,'a receding ac= tion, and a uniform ratio of velocity, and by reason of the eiiicient support given to the enter ends of the pins the latter may be made or" comparatively light material without liability of being bent, which bending would of course impair the perfect cooperation of the rollers on the engaging wheels.

"- While this form of gearing may be employed for various purposes, it is particularly adapted for use on so-called ch'ainless bicycles by strnction. It will he understood that while the Wheels are shown with their axesarranged-at right angles the relative angle could be changed re son of its lightness and simplicity of con they might be arranged at a slight angle there to without departing from the spirit of my invention.

I claim as my invention-- 1. In gearing, the combination with two wheels with their axes'arranged at an angle relatively, each wheel having a series of pins on its face, a series of eonoidal rollers rotatable on the pins, and a plate rigidly attached to the face of the wheel having fingers extending upwardly and outwardly therefrom and secured to the ends of the roller-pins, the rollers on the said wheels engaging successively to drive either wheel from the other.

2. I11 gearing, the combination with two wheels with their axes arranged at an angle relatively, each wheel having a series of pins on its face, a series of (conoidal) rollers rotatable on the pins and a plate rigidly attached to the wheel having the fir gers extending out- 20 wardly and secured to me ends of the pins carrying the rollers, the rollers on said wheel engaging successively w drive either wheel from the other.

3. In gearing, the c mhination with two wheels with their axes .arranged at an angle relatively, each wheel having a series of pins other.

ROBERT W. JAMIESON. Witnesses:

F. F. CHURCH, G. W. RICH.

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