US1611641A - Skate - Google Patents

Description

Dec. 21 1926.

w. JERRAE SKATE Filed Feb. 2, 1926 2, Sheets-Sheet A mm mm IN VEN TOR.

LU. JERRFIE "mgw A TTORNEYJ Patented Dec. 21, 192%.

UNITED STATES PATENT @FFICE.

WILLIAM JERRAE, (3F SAN FRANCISCO, CALIFORNIA.

' SKATE.

Application filed February This invention relates to improvements in skates, and has particular reference to a selfpropelling skate.

The principal object of this invention is to produce a skate wherein the user may transmit motion to the wheels of the skate for the purpose of forward movement.

Another object is to produce a skate -wherein the leverage is the greatest possible within the limitation of the skate size.

A further object is to provide means for lowering the center of gravity, thereby assisting in balancing the skate.

Other objects and advantages will be ap parent during the course of the following description.

In the accompanying drawings forming a part of this specification, and in which like numerals are employed to designate like parts throughout the same,

Figure I is a top plan view of my improved skate,

Figure II is a side elevation of Figure I,

Figure III is an enlarged detail view showing the gear actuating mechanism and rest,

Figure IV is a cross-sectional view showing the driving mechanism, and

Figure V is a detail view showing the roller clutch mechanism.

At the present time in roller skating it is necessary to swing the foot in order to gain momentum when traveling along a level surface. It is my intention to devise a skate wherein it will not be necessary for the user to take either skate off the ground, securing the propelling force by a mere up and down movement of the feet.

In the accompanying drawings wherein for the purpose of illustration is shown a preferred embodiment of my invention, the numerals 5 and 6 refer to wheels which contact the ground and serve to support the user. These wheels are joined one to the other by frame which is designated as a whole by the numeral 7 and essentially consists of three parts, namely, a front fork 8, a rear fork 9 and a central yoke 11 which joins the front and rear forks.

By viewing Figures I and II, it will be noted that the front fork is extending beyond the front wheel and that the ends of the fork are spaced by a spacer 19 through which a bolt 13 passes. This bolt serves to pivotally support a pair of rearwardly extending rods 14 and 16. The rods are 2, 1826. Serial No. 35,571.

spaced from the ends of the fork 8 as by spacers 17 and 18.

The rods 14 and 16 extend toward the rear wheel 5 to a point beneath the yoke and near the rear end thereof, at which point the two rods are joined and secured to an actuating bar 19. This actuating bar has secured to the rear end thereof an upwardly extending rack bar 21 upon which teeth '22 are formed. These teeth are adapted {to engage the teeth of a gear 23 which gear is provided with cam-shaped slots 24 within which rollers 26 are positioned. These rollers are adapted to engage a collar 27 which is attached to a plate 28 secured to the rear wheel 5 in any suitable manner.

The plate 28 is of a diameter greater than the diameter of the gear 23 as is also a plate 29. This construction forms a channel between which the rack bar 21 moves thereby preventing the teeth of the rack bar from becoming disengaged from the teeth of the gear.

By viewing Figures II and III, it will be noted that the rack bar carries segmental stop members designated by the numerals 31 and 32. These segmental stop members serve to limit the up and down movement of the rack bar and may be provided with rubber buffers as indicated at 33, (see Fig ure III).

These buffers 33 merely serve to prevent any jar when the segmental members come in contact with the teeth of the gear.

A guide bar is shown at 34: and serves to prevent a twisting of the actuating bar 19. This guide bar 34; also serves to lock the actuating bar when desired.

By employing a pin in the opening 36, the actuating bar may be locked to the guide bar after which the skate may be employed in the usual manner of employing roller skates.

I have shown in dotted lines at A. and B the position of toe and heel plates, which would be employed and to which the customary straps would be attached, which straps would engage the shoe in the usual manner.

By referring to Figure IV, it will be noted that the bolt 37 passes through a tu bular member 38 which prevents the nut 39 from squeezing the plates 28 and 29 together, which would-exert a binding action and prevent the perfect operation of my device.

It will thus be seen that I have provided a skate which will perform all the objects set forth in a simple and eflicient manner.

It is to be understood that the form of my invention herewith shown and described is to be taken as a preferred example of the same and that various changes relative to the size, shape and arrangement of parts may be resorted to without departing from the spirit of the invention, or the scope of the subjoined claim.

Having thus described my invention, I claim In a skate, a front wheel and a rear wheel, a frame extending between said front and said rear wheel, said frame having a fork extending to a point beyond the forward edge of said -front wheel, a pair of parallel soaced bars pivotally connected to said frame at a point adjacentthe forward extremity of said fork, an actuating bar secured to said parallel members, a rack secured to said actuatin bar, a plate posit-ioned adjacent said rear wheel, a second plate spaced from said first mentioned plate, a gear positioned between said plates, a clutch mechanism positioned in said gear in such a manner as to rotate said rear wheel in one direction only, the teeth of said gear meshing with the teeth of said rack bar, and segmental stops formed at the opposite ends of said rack bar for the purpose specified.

In testimony whereof I afiix my signature.

WILLIAM] JERRAE.

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