US879756A - Hand-car. - Google Patents

Description

PATENTED PEB, 18, 1908.

I J. W. PINGH.

HAND GAR.

APPLIOATON FILED IULY16, 1907.

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W/TNESSES S Vl E N w T T A Vl B l /h l /f/ A.A f l PATENTLD PEB. 18, 1908.

J. W. PINGH. HAND' GAR.

APPLICATION FILED JULY 16. 1907.

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JOHN WALTER FINCH, OF ELIZABETH, MISSISSIPPI.

HAND-CAR.

Specification of Letters Patent.

Patented Feb. 18, 1908.

Application filed July 16| 1907. Serial No. 383.966-

T o all-whom it may concern:

Be it known that I, JOHN W. FINoH, a citizen of the United States, residing at Elizabeth, in the county of Vashington and State of Mississippi, have invented a new and useful Improvement in Hand-Cars, of which the following is a specification.

This invention relates to hand cars, and has for its object to provide im roved means for driving the same, particu arly with respect to the driving connections between the rocking or working lever and a planetary gearing from which motion is transmitted to the wheels.

The invention is illustrated in the accompanying drawings, in which Figures 1, 2 and 3 are side elevations with the parts in different positions. Fig. 4 is an end elevation.

The hand-car frame of ordinary construction is indicated at 5, mounted on wheels 6 and having on the platform a pedestal 7 of suitable construction. The working or rocking lever 8, having handles 9 at opposite ends is conveniently made of piping properlyT braced, and is fulcrumed by means of a rock shaft 10 upon the pedestal, and this shaft has keyed or otherwise fastened thereon a segment 11 which accordingly vibrates with the rocking lever. It may be preferred to secure the segment 11 by a set screw 11it so said segment can be moved to suit the one on the pitman to any angle to correspond. Said segment is in mesh with a companion segment 12 fast upon a stub shaft 13 which is connected to the shaft 10 by a pair of swinging links 14 free to turn upon both of said shafts.

The shaft 13 is connected by pitman 15 to a stub shaft 16 which has a squared portion carrying the planet spur gear 17 which revolves around and rotates the sun gear 18 whose shaft 19 is mounted in bearings 20 on the frame of the car. Thepitman 15 is rigidly iixed to both shafts 13 and 16. This is conveniently done by squaring said shaftsl and the holes in the ends of the pitman through which they extend. The shafts 16 and 19 are connected by a pair of swinging links 21. Said shaft 19 has thereon a relatively large sprocket wheel 22 belted by chain23 to a small sprocket 24 on one of the axles of the car.`

The rocking lever 8 has the ordinary rocking motion, and in consequence of the use of the segment gears 11 and 12 the lateral swing or motion of the pitman incident to the revolution of the planet gear around the sun is effected under pressure. In other words the pitman and the segment 12, being rigid with each other, form a bent lever to throw the parts over the dead centers. Thus,

Fig. 1 shows the lever in level or middle position; Fig. 2 swung one way and Fig. 3 the other. Starting from the position shown in Fig. 2, when the lever is rocked toward the level position, the gear 17 starts to turn or revolve around the sun gear 18, and after passing the quarter or middle position shown in Fig. 1 the segment 11 acts on the segment 12 and pitman 15, the whole forming a geared bent lever tending to' throw or turn the planet gear over the top center, and the same effect results during the last quarter of the double stroke, or while approaching and passing the lower center. The arrangement shown utilizes the whole force or leverage of the rocking lever during the entire stroke. Obviously, if the pitman were directly connected to the rocking lever, much of the applied force would be ineffective when approaching or leaving centers.

The present device gives great or full power for force applied and therefore requires less power to drive the car. There is also less strain on the links 21, since the leverage applied to the pitman tends to hold the vplanet and sun gears inmesh.

I claim 1. In a driving mechanism, the combination of a rocking lever having a gear thereon, a sun and planet gearing, and a combined bent lever and pitman -supported between the planet gear and the lever and having a gear in mesh with the gear on the lever.

2. In a driving mechanism, the combination of a rocking lever having a segment gear fastened thereto, a sun and planet gearing, a combined bent lever and pitman one end of which is connected to the planet gear and the other end of which is provided with a segment gear' meshing with said segment gear, and a swinging link connecting the pivots of the rocking and bent levers.

3. In a driving mechanism for a hand car, the combination with a rocking lever pivoted on the pedestal of the car, 4a sun and planet gearing mounted on the frame of the car and geared to an axle thereof, a pitman one end of which is connected to the planet gear, swinging links connecting the other end thereof to the pivot of the rocking lever, and

a segment gear rigid with the pitman and segment gear, a rocking lever, a pair of links 10 forming a bent lever therewith and another connecting the pivotsI of said levers, and a segment gear rigid With the rocking lever segment gear fast on the pivot of the rocking and meshing With the segmenty gear of the lever and in mesh With the said segment pitman. gear.

4. The combination of a sun and planet JOHN WALTER FINCH. gearing, a bent lever one arm of Which forms Witnesses: a pitman and is connected at its end to the W. H. CAMMACK,

planet gear and the other arm of which has a JACK STINsoN.

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