US265987A - George s - Google Patents

Description

(No Model.)

G. S. SHEFFIELD.

HAND GAR.

Patented 001;. 17, 1882.

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WUWESSM A f By his Homey/6 UNITED STATES PATENT OFFICE.

GEORGE S. SHEFFIELD, OF THREE BIYERS, MICHIGAN, ASSIGNOR TO THE SHEFFIELD VELOOIPEDE OAR COMPANY, OF SAME PLAGE.

HAND-CAR.

SPECIFICATION forming part of Letters Patent No. 265,987, dated October 17, 1882.

' Application filed July 17,1882. (No model.)

T all whom it may concern:

Be it known that I, GEORGES. SHEEEIELD, of Tllree Rivers,I ill the county ot' St. Joseph and State of Michigan, have invented certaill new and useful Improvements ill Hand-Gars,

of which the following is a specification.

My improvements relate to several different parts ot' a handcar, and are succinctly stated at the elld ot' my description, in my claims.

1o In the accompanying drawings, illustrating a handcar and its diil'erent parts embodying illy improvements, Figure l is an elevation of a hand-car viewed from one side. Fig. 2 is a side elevation of the main driving gear-wheel.

i5 Fig. 3 is a top or plan view of the walkingbeam. Figs. 4 and 5 are cross-sections of the main gear-wheel shown ill Fig. 2, drawn respectively upon the dotted lines 4 4 alld 5 5 of Fig. 2. Fig. 6 is a side view alld Fig. 7 a

zo front view ot' a section ot' one ofthe brakes and a part ot' its operating devices shown in side elevation, as applied to the car-wlleels in Fig. l. Fig. 8 shows a step and foot-rod provided with a coiled spring and aspring-barrel, partly in section, so as to display the spring and footrod ill place within the barrel. Fig. 9 is a side view ot' the step, angular foot-rod, and barrel, and a flat spring working Vagainst a pin projecting illwardly from the foot-rod.

3o A indicates the main frame of the hand-car; B, the wheels; C, the main driving gear-wheel gearing with a pinion (not illustrated) fixed on the axle of one pair ot' wheels.

D indicates the walking-beam provided with handles E; F, its supporting-frame, and G the connecting-rod between the walking-beam and the crank H otthe lnain driving gear-wheel.

I indicates the brake-shoes pivoted to the main frame at K. g

4o L indicates a pair of rods or toggle-levers,

' pivoted at their outer ends to the lower portions of the brakes and at their inner ends to the foot or toe of the foot-rod M, which rod works vertically within the barrel N.

4 5 From the foregoing description and by reference to the drawings the general outlines of the construction of the car will be understood, and it will be perceived that to drive it the walking-beamis operated by means of its handles ill the usual way, alld thatto stopitpress- 5o ure by means of the foot or otherwise is ap plied to the step O, which will oausethe brakeshoes to press against the peripheries of the l'ront and rear wheels through the instrumentality ot' the foot-rod and the toggle-levers. 55 There may, ofcourse, lie a set ot' brake lnech, allism upon each side of the car, if desired.

I will now proceed to describe more exactly what are my improvements as specitied in my clailns, so as to distinguish them from subject- 6o matter which is old ill hand-cars. d

In the ordinary hand-car llle walking-beam and lits rock-shaft are usually cast ill one piece, or else the rock-shaft is welded or shrullk or otherwise rigidly lixed to the walking-beam. It is desirable in practice that the walkingbealn may be adjusted on the rock-shaft and be readily removable therefrom. Therefore illstead of constructing and connecting the beanl and its rock-shaft ill the usual manner, I pro- 7o vide a shoulder or collar, I), or equivalent stop llpon the rock-shaft, and also a screw-thread,

Q. I then provide a hole through the center ofthe walking-beam and slip it to place upon theshaft against the collar, and then when properly adj usted screw a nut, R, tigh tly against it and clanlp it in place betweenthe collarand the nut. This renders it easy to adjust the beam relatively to Ille rock-shaft, and also to remove it at will, and in case either the beanl 8o or the shaft is broken but one of these parts need be replaced, which is a material economical advantage.

In the ordinary hand-car the attachment ot' the collnecting-rod to the walking-beam is usually lnade by means ol an eye or pivot ot` any ordinary construction, so that when lost illotion occurs, as it will do very soon in practice on account ot' wear, there is no means ot' adjustment to take it up, and it continues to in- 9o crease and renders the connecting parts more liable to break, more difficult to work, and jerky and noisy in operation. To overcome this diiculty I provide a suitably-turned wristpin, S, and a pin-hole, preferably in a downward projection, T, ot' the walking-beam, and shrink the pin very tightly into its hole. I then provide a journal-box in two parts for the pin upon the end of the connecting-rod, as follows: The rod is provided with a head or plate, U, upon which rests one part of the box V. The other part or cap, V, is placed over the pin and over the rst part, and the two parts are held securely in place by means of a U-bar, X, passing through holes in the head of the connecting-rod and clamping down securely upon the box by means of nuts Y. Vith this careful securing of the wrist-pin and with exact itting of the box to the pin there will be no play or lost motion, and it will not rapidly occur by wear, because the material for the parts of the box can be selected with reference to its antifrictional and durable qualities; but when wear has taken place and lost motion begins to be manifest it can readily be remedied by detaching the parts and grinding oft' the contact faces of the sections of the box, and then adjusting them to place and securing them,as before.

In the ordinary hand-car the main driving gear-wheel is secured to the crank-shaft either by means of a set-screw or a key connecting the hub of the wheel with the shaft. In this style of fastening the strain all comes upon the holding screw or key, which is very liable to get loose and is very insecure. To provide against this difficulty, I cast or otherwise secure a cross-bar, Z, upon the main driving gearwheel extending from one radial arm to another, and provided with two lugs, a, between Which is a radial crank-recess. The radial recess for the crank-arm may be formed by lugs projecting from one of the radial arms of the wheel or otherwise in the manufacture ot' the wheel. In connecting the crank and main driving-wheel together I fplace the crankarm I) between these lugs in the recess, where it is neatly itted, and a set-screw, c, or any other appliance may be employed to connect the hub ot' the wheel with the shaft, merely to prevent its slipping longitudinally out of place on the shaft. By lthis means the strain is taken away from the hub and parts which usually attach it to the shaft and carried radially outward to a point on the crank-arm nearly,.or it may be quite, to where the'driving-power of the connecting-rod from the walking-beam is exerted upon the crank, which affords great security. rl'here is thus provided such an extent of bearingvsurface between the crank-arm and the holding-lugs that the crank-shaft can never become in any way loose in its connection with the main driving gear-wheel.

rlhe brake mechanism has already been partly described, and it only remains to add that the coiled spring d is so applied to the foot-rod within the barrel N as to tend to elevate the rod and normally to elevate it sufficiently to withdraw the faces of the brake-shoes from contact with thc peripheries of the wheels. A flat spring, c, working against the pinfor the like, may be employed instead of the coiled spring. Vhen itis desired to apply the brakes, pressure upon the step, as above stated, is applied by the foot, which forces the brake-shoes against theperipheries ofthe wheels, and when the pressure is relieved the spring immediately withdraws the brake-shoes from contact with the wheels automatically through the instrumentality of the toggle-levers or other equivalent connecting mechanism between the foot-rod and brake-shoes which may be employed.

Having thus described my improvements, what I claim, and desire to secure by Letters Patent, is-

1. In combination with the walking-beam ot' a hand-car provided with a central rock-shaft hole, a rock-shaft adapted to pass through the hole in the beam, these two parts being secured together adjustably and detachably by means of a thread on the rock-shaft and a clampingnut, substantially as set forth.

2. In combination with the walking-beam of a hand-car, a turned wrist-pin rigidly attached thereto, and a pitman-rod provided with the head or plate U, the two parts of thejournalbox V and W, and the U-bar X, and nuts Y, all constructed and operated as set forth.

3. A main drivinggear for a hand-car, provided with a radial recess for the crank-arm, substantially as set forth.

4. The combination. with the main drivinggear, of the cross-bar Z and lugs a, forming a recess for the crank-arm, substantially as set forth.

5. In a hand-car, the combination, with the brake-shoes and toggle-levers, of a foot-rod provided with a retracting-spring and having a step upon which the weight of a person may be thrown so as to break both front and rear wheels at one side of the car, substantially as set forth.

In testimony whereof I have hereunto subscribed my name.

GEORGE SOLYMAN SIIEFFIELI).

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