Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUS297388 A
Publication typeGrant
Publication dateApr 22, 1884
Filing dateSep 15, 1883
Publication numberUS 297388 A, US 297388A, US-A-297388, US297388 A, US297388A
InventorsAlstd James B. Hall
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Tomas p
US 297388 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

(No Model.)

T. P. 85 J. B. HALL.


- Patented Apr. 22, 1884.




SPECIFICATION forming part of Letters Patent No, 297,388, dated April 22, 1884.

Application filed September 15, 1883. (No model.)

To all whom it may concern Be it known that we, TOMAs P. HALL, of Toronto, Province of Ontario, Canada, and JAMEs B. HALL, of Georgetown, Province of Ontario, Canada, have invented a new and Improved Roller-Skate, of which the following is a full, clear, and exact description.

The object of our invention is to provide an improved motor or vehicle, which can be attached to the foot.

The invention consists in a small vehicle adapted to be fastened to the foot, and constructed with a vertically-reciprocating platform, from which the motion is transmitted to the driving-wheels by suitable gearing or belts, the said platform being pressed upward by a spring and downward by the foot, the gearing being provided with a clutch, which looks or engages when the platform is pressed downward and slips when the spring presses the platformupward. Therear wheel is journaled on a fork pivoted to a spring-arm of the frame, above which spring a tongue projects, which serves as a brake.

Reference is to be had to the accompanying drawings, forming part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure l is alongitudinal elevation of our improved gravimotor. Fig. 2 is a plan view of the same, parts being omitted; and Fig. 3 is a longitudinal elevation of a modification of the same.

Two driving-wheels, A, are mounted on the ends of a shaft or axle, B, journaled in the front part of a platform-frame or foot-rest, O, which is provided at its rear end with a projecting spring-arm, D, to the end of which a fork, E, is pivoted in such a manner that it can swing laterally, a third wheel, F, being journaled in the said fork. A bracket-plate, G, projects from the rear of the platform 0, over the spring D, and over' part of the rear wheel. A pinion, H, is rigidly mounted on the axle B and engages with a cog-wheel, J, pivoted to the downwardly-projecting part of the frame 0. On the wheel J a clutch-disk, L, is formed, and a like clutch-disk is formed on a cog-wheel, M, loosely mounted on a shaft, N, on which the wheel J is mounted. A

spring, 0, coiled around the shaft, has one end connected with the cog-wheel M, and the other end to the frame of the platform 0. The cog-wheel M engages with a cog-wheel, I which in turn engages with a rack, Q. supporting a platform, R, or foot-plate. The rack Q passes through a suitable opening in the platform 0.

In the modification shownin Fig. 3 two or four wheels can be provided, all of which are drivers. In place of the rack Q, arod or bar, Q, is provided, which has a strap or belt, S, attached to its lower end, the other end of which strap is secured to a wheel, 'I, mounted on the same shaft with a cog-wheel, WV, from which the motion is transmitted by suitable means to the shafts of the driving-wheels. If the plate R is depressed, the clutch-disks engage and the wheels A are revolved in the direction of the arrow a by the intermediate gearing-belt or other device. Thereby the spring 0 is brought in tension. When the pressure is removed from the plate R, the springOuncoils or expands and turns the cogwheels M and P in such a manner as to throw the rack Qand the plate It upward, the clutchdisks sliding over each other, and thus permitting the wheels A to revolve in the direction of the arrow to. The vehicle can thus be propelled forward by pressing the plate R down by means of the foot, and then permitting it to rise alternately. As a motor is fastened to each foot, it is only necessaryto bring the weight of the body on each foot alternately. If the weight of the body is brought on the rear end of the foot-plate R, the spring-arm D is bent slightly, and the end of the tongue G will be brought in contact with the wheel F, and thus serve as a brake.

The vehicle can be operated very easily, and very great speed can be obtained.

Having thus described our invention, we claim as new and desire to secure by Letters Patent- 1. Afoot-power vehicle or wheel-skate having a foot-rest downwardly movable by the gravity of the operator and upwardly by a spring, for the purpose specified.

2. The combination, in a gravimotor having two front wheels, with a rear wheel, F, of

a spring-supported brake-plate and a vertically reciprocating foot rest, whereby the brake may be applied by throwing the weight on the heel, as described.

3. Agravimotor having the front wheels, A A, the bearing-frame G, a single rear wheel,

F, and a bearing frame or fork, E, jointed to said frame 0, as shown and described.

4. The combination, with a platform, 0, of the vertically-reciprocating platform R, the shaft B, the driving-wheels A, the pinion H, the cog-wheels P, M, and J, the clutch L, the spring 0, and the rack Q, substantially as herein shown and described.

5. The combination, with the frame 0, provided with the spring-arm D, of the fork E, pivoted to the arm D, the wheel F, and means for revolving the driving-wheels, substantially as herein shown and described.

6. The combination, with the frame 0, provided with a spring-arm, D. and a tongue, G, of the fork E, pivoted to the spring-arm D, the wheel F, and means for revolving the driv ing-wheels, substantially as herein shown and described. v

T. P. HALL. J. B. HALL. WVitnesses:



Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US5280935 *Jun 1, 1993Jan 25, 1994Boris SobocanSelf-propelled skateboard
US5895065 *Feb 29, 1996Apr 20, 1999Khomo; Malome T.Method and means of enhancing human powered locomotion
US7040638Jun 21, 2004May 9, 2006Jeffrey Eaton ColeOccupant-propelled fluid powered rotary device, truck, wheeled platform, or vehicle
US7216876Jan 5, 2005May 15, 2007Cole Jeffrey EOccupant-propelled fluid powered rotary device, truck, wheeled platform, or vehicle
US7374179Dec 21, 2005May 20, 2008Cole Jeffrey ETruck assembly for a skateboard, wheeled platform, or vehicle
US7631884Jun 15, 2007Dec 15, 2009Jeffrey E ColeTruck assembly for a skateboard, wheeled platform, or vehicle
US7635136Mar 14, 2006Dec 22, 2009Jeffrey E. ColeTruck assembly for a skateboard, wheeled platform, or vehicle
US7744100Sep 11, 2009Jun 29, 2010Jeffrey E. ColeTruck assembly for a skateboard, wheeled platform, or vehicle
Cooperative ClassificationA63C17/12