US1016687A - Ice-motor. - Google Patents

Description

A. GRUB.

ICE MOTOR.

nrucuxon FILED IAN.12,1911.

Patented Feb. 6, 1912.

UNITEI) STATES PATENT OFFICE.

ALBERT GRUB, OF CHICAGO, ILLINOIS, ASSIGNOB OF ONE-FOURTH TO FREDERICK GRUB, OF CHICAGO, ILLINOIS.

ICE-MOTOR.

To all whom it may concern Be it known that I, ALBERT GRUB, a citizen of the United States, residing at Chicage, in the county of Cook and State of Illinois, have invented new and useful Improvements in Ice-Motors, of which the following is a specification, reference being had to the accompanying drawings, forming a part thereof.

The purpose of this invention is to provide means for propelling a sled over a roadway of ice or hard frozen snow crust.

It consists of the features and elements shown and described, as indicated in the claims.

In the drawings: Figure 1 is a top plan view of a sled fitted with this device. Fig. 2 is a side elevation, being a section at the line 22 on Fig. 1. Fig. 3 is a detail of a guide roller and track for the same. Fig. 4 is a detail elevation showing a transposed position of certain parts.

Briefly, this device consists of a driving dog mounted for reciprocation upon each runner of the sled, or upon some other portion of the sled frame, and provided with means for guiding its movement relatively to the tread portion of the sled runner. In the form shown in the drawings, this driving dog consists of a connecting rod, 1, having at one end a spur, 1 and a guide roller, 2, and being connected at the other end with an actuating hand-lever 3. Although shown as a hand-power device, certain distinguishing features of this invention would be also applicable to a power driven sled.

For controlling the movement of the spurcarrying end of the connecting rod, 1, there is provided a cam track, 4, for the roller, 3, comprising an inclosing rail 4*, and a guide rail 4, within the inclosure formed by the rail 4, and having upper and lower guide surfaces 4 and 4 respectively. Preferably, these rail members are formed as laterally projecting flanges of the base portion 4 of a single casting 4, which is secured in any suitable manner to the inner face of the sled runner A.

It will be understood that the device is made in duplicate, and applied to a runner on each side of the sled, in order that the action may be balanced, and that the steering may be in no way interfered with.

The lower surface, 4 of the guide rail is Specification of Letters Patent.

Application filed January 12, 1911.

Serial No. 602,186.

so positioned relatively to the tread portion B of the runner A as to contact with the roller, 2, and to bring the point of the spur, 1 below the tread into engagement with the iced roadway. This engagement is maintained throughout that portion of the working stroke for which the guide surface 4 is parallel with the tread B, the upwardly sloping ends of the said surface 4 serving respectively to effect such engagement and to relieve the spur therefrom. For facilitating this relief of the spur from the ice at the end of the working stroke, and for insuring that the return stroke shall be begun along the upper track furnished by the guide surface 4, the lower rear portion of the outer guide rail 4 is composed of the separate element 4 pivotally mounted upon the base of the track casting for swinging upward toward the rear end of the guiderail 4*. A spring 5 is shown positioned to cause this movement, and the element 4 will normally stand abutting the guide-rail 4, except when forced away from it during the passage of the roller 2. The guard rail 4 is formed with a stop lip 4 to limit the opening movement of the element 4 At the end of the return stroke, the roller 2 will follow the curve of the outer guard-rail, 4, downward, and, as above mentioned, will be engaged by the sloped end of the guide-surface 4 as the working stroke commences.

Since the action of the device is intermit tent, it would be necessary in traveling uphill, that some means be'provicled to prevent the slide from slipping backward during the non-working stroke of thedog, 1. For this purpose, the sprags 6 are shown pivoted to the sled runner near its tread, and so sloped as to merely trail during the forward movement of the runner, but so as to dig into the ice or road surface immediately upon the commencement of any rearward movement.

It is obvious that the parts of the device might be variously designed with a view to the retention of the roller, 2, upon its track guides; but, as shown, the roller is made with a curved or crowned tread, 2 and the guide surfaces of the track, 4, are grooved to fit the curve of the tread and thus laterally retain the roller.

In Fig. 2, the connecting rod, 1, is shown attached to the operating lever, 3, at the point, 3*, above the fulcrum, 3", but to adapt Patented Feb. 6, 1912.

the device to be operated either by a push or by a pull during the working stroke, in accordance'with' the preference of difierent operators, these points, 3 and 3 are made interchangeable. When the connecting rod as made curved, as shown, this necessitates separating it for reversal of the curve when it is linked to the lever at the lower point, 3", and for this reason, the forward portion, 1', is shown bolted to the remainder of the rod, 1. An auxiliary fulcrum block, 7, is mounted upon the sled in position to carry the lever by a pivot-pin through the point, 3

When this device is applied to a double handles, 3, of each lever may be tubular,

anda connecting rod, 8, may then be insertc ed through them both when simultaneous operation is desired for straight line travel.

1. An ice motor comprising a runner adapted for sliding upon a road surface; a rod provided at one end with a spur and a roller; a cam trackfor the roller comprising an upper and a lower track, said upper track being positioned for guiding the spur out of engagement with the road surface, said lower track being positioned for guiding the spur in engagement with the road surface; a curved track connecting the forward ends of the upper and lower tracks, and sloped downward from' its connection with the lower track; acurved track connecting the rear ends of the lower and upper tracks, the lower portion of said curved track being pivoted for swinging upward and forward toward the upper track; a spring positioned to cause such swinging movement of the pivoted track, and means for reciprocating the dog.

2. An ice motor comprising a runner adapted for sliding upon a road surface, a dog mounted for reciprocation upon the runner; a cam track for guiding the dog in engagement with the road surface during its movement in one direction, and for guiding said dog out ofengagement with the road surface during its movement in the opposite direction; an actuating lever; a rod operatively connecting the dog with said lever, the lever being fulcrumed at its lower end, the rod being disengageably connected to the lever at a point between the ends of the lever, and an auxiliary fulcrum positioned for supporting the lever at said point between its ends, the fulcrumed end of the lever being adapted for connection with the rod.

8. In combination with a sled having a pair of runners adapted for sliding upon a road surface; a dog mounted for reciprocation upon each runner; cam tracks for guiding the dogs in engagement with the road surface during their movement in one direction, and for guiding said dogs out of engagement with the road surface during their movement in the opposite direction; an actuating lever operatively connected with each dog, said levers being exactly similar and mounted for movement in parallel planes; a tubular handle on each lever, and a rod adapted to be inserted through said handles for connecting them for simultaneous operation.

In testimony whereof, I have hereunto set my hand at Chicago, Illinois, this 6th day of January, A. D., 1911.

ALBERT GRUB.

WVitnesses ROBT. N. BURTON, PAUL J. GATHMANN.

Gopies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

7 Washington, D. C.

Images