US407828A - Tire-tightener - Google Patents

Description

A.KNOX.

TIRE TIGHTENER.

Patented. July 30, 1889-.

Witnesses: TYlN/Efkltlill Aw clrsmKi mx N. PETERS, Pnowunw n mr. Washington. D. C.

NITED ANDREWV KNOX, OF PEWAMO, MICHIGAN.

'TIRE-TIGHTENER.

SPECIFICATION forming part of Letters Patent No. 407,828, datedJuly 30, 1889.

Application filed May 22, 1889. Serial No. 311,892- (No model.)

To all whom it may concern.-

Be it known that I, ANDREW KNOX, a citizen of the United States, residing at Pewamo, in the county of Ionia and State of Michigan, have invented certain new and useful Improvements in Tire-Tighteners, of which the following is a specification, reference being had therein to the accompanying drawings.

- This invention relates to new and useful improvements in wagon and carriage tire tightening machines secured upon the spoke, by which wagon and carriage tires are tightened by forcing the felly outward and putting an iron, rubber, or leather washer open at the side on the shoulder of the spoke; and the invention consists in the peculiar construction of the device for tightening the jaws upon the spoke, whereby the device may be held in position and tightened to the necessary degree without damaging or marring the spoke in any way, and, further, whereby it is attached and detached more readily and poweris more evenly and easily applied in securing it than in previous constructions, all as more fully hereinafter described.

In the drawings which accompany this specification, Figure 1 is a side elevation of myimproved device attached to a spoke. Fig. 2 is an elevation of the jaw at right angles to Fig. 1. Fig. 3 is a perspective View of the tightening-clip detached. Fig. 4 is a plan of the same. Fig. 5 is a plan of the leather washer.

A is the felly, B the tire, and C the spoke, of a wheel to which my device is attached.

D D are a pair of jaws, provided on their sides with suitable grooves E, in which are secured the bolts F, having the caps G at the lower end and the concave heads H at the top.

I is a nut secured at the top of the jaw, through which the bolt passes, and adapted to be turned, thereby raising or lowering the bolt F, as may be desired.

K are channels, preferably of rectangular shape, formed in the sides of the jaws and adapted to receive the arms L of the clip M.

N are bolt-holes through the ends of arms L, in which a suitable bolt or pin 0 is adapted to fit.

P is a set-screw passing through the head of the clip and having a suitably-squared end or handle, whereby it may be readily turned.

The parts being thus constructed and arranged, they are intended to operate as follows: The jaws being secured upon the spoke, the head H engaging with the inner side of the felly, the arms L of the clip are passed through the channels K of the jaws, and the pin 0 secured in position, as shown in Fig.

1, thereby holding the jaws in position upon the spoke. Now, in order to get the necessary clamping effect, the set-screw P is turned so as to bear with its inner end against the shoulder Q of the jaw, which clamps the two jaws tightly upon the spoke, and, as is well known, the necessary degree of tightness can be had to a nicety by means of the screw-power, and the clamping effect is conveyed the whole length of the jaws, so that no one point is indented into the spoke more than the other. Any lateral motion of the jaws in relation to the clip is prevented by means of the sides of the channels K. The nuts I, being now turned, will press outward the head 11 against the felly, thereby forcing the felly outward, and thereby allowing of the insertion of an iron, rubber, or leather washer on the shoulder U of the spoke. I preferably use split washers, as shown in Fig. 5, having the cut-away portion T, as this allows of more readily engaging the washer in its position.

In the present state of the art, where spokes are built of nearly the same diameter from end to end, it is necessary to get a very tight grip upon the polished surface of the spoke, so that it is not possible for the machine when the jaws are in position to slip even the smallest fraction of an inch, as it would thereby damage the appearance of the wheel.

In order to detach my device from the wheel, I simply have to loosen the set-screw, withdraw the pin, and the jaws will then be released from their position.

In practice it requires but a single turn of the set-screw to loosen it from its position and allow of the withdrawal of the pin 0.

\Vhat I claim as my invention is- 1. In a tire-tightener, the combination, with a'pair of jaws having transverse grooves in their sides registering with each other, of a clip formed with two parallel arms united by an enlarged integral portion and formed with lateral openings in their outer ends, a pin fitting in said openings, and a set-screw in the in their outer ends, a pin in said openings,

connect ingportion,substantiallyasdescribed. and a set-screw in the cross-piece, substan- [o 2. In a tire-tightener, the combination, With tially as described.

two jaws havinglongitudinally-movable bolts 5 in their outer ends and rectangular grooves formed in their sides, of a clip constructed Witnesses:

with two rectangular arms united by an in- JAMES HENRY WHITTAKER,

tegral cross-piece and having lateral openings JOHN PENNIN GTON.

ANDRENV KNOX.

Images