US495454A - Device for mending pneumatic tires - Google Patents

Description

(No Miodel.)

H. H. CUMMINGS 8u R. GOWEN. DEVICE FOR MENDIN'G PNEUMATIG TIRES.

No. 495,454. Patented Apr. 11, 1893.

\/\/|TN 55555: E lNvENTqUREI UNITED STATES PATENT OFFICE.

` HENRY H. CUMMINGS, OF MALDEN, AND ROBERT COVVEN, OF CAMBRIDGE,

MASSACHUSETTS.

`DEVICE FOR MENDING PNEUMATIC TIRES.

SPECIFICATION forming part of Letters Patent No. 495,454, dated April 11, 1,893.

Application tiled June 13, 1892. Serial No. 436.425. (No model.)

To all whom it may concern..-

Be it known that we, HENRY H. CUMMINGs, of Malden, and ROBERT COW EN,of Cambridge, in the county of Middlesex and State of Massachusetts, have invented certain new and useful Improvementsin Devices for Mending Pneumatic Bicycle-Tires, of which the followingis a specification.

This invention relates to that class of devices used for stopping holes or perforations accidentally made in pneumatic tires for bicycle wheels, in which a receptacle is employed, holding a quantity of mending material, said receptacle having a suitable nozzle adapted to be forced into an orifice in a pneumatic tire, and means for ejecting a quantity of the material through said nozzle, and thus stopping or plugging the hole into which the nozzle is inserted.

The invention hasfor its object to provide an improvedmeans for ejecting the material from the nozzle under sufficient pressure to cause it to adequately plug the hole, and to this end it consists in theimprovements which we will now proceed to describe and claim.

Of the accompanying drawings, forming part of this specification: Figure l represents a side elevation of a tire-mending device, constructed in accordance with our invention. Fig. 2 represents a longitudinal section of the same, showing parts of the device in elevation. Fig. 3 represents a longitudinal section of a portion of the device, showing in section a part that is shown in elevation in Fig. 2.

The same letters of reference indicate the same parts in all the figures.

In the drawings: a represents a receptacle, preferably of cylindrical form, adapted to contain a quantity of viscid material, such as is used for stopping or plugging holes in pneumatic bicycle tires. Said receptacle is provided at one end with anozzle a which is of attenuated form,and adapted to be inserted in a puncture or break in a bicycle tire.

b represents a piston, which is fitted to move in the receptacle ot, and, when moved toward the nozzle a', is adapted to eject a portion of the viscid material from the receptacle a through said nozzle. The piston b is provided with a screw-threaded stem b', which is engaged with an internally screw-threaded nut c.

Said nut is formed at its inner end to enter and slide lengthwise in the receptacle a, and

is provided with a shoulder c2. The outer i portion of the nut cis preferably somewhat enlarged, and formed to be grasped and rotated either by the fingers or a suitable wrench.

Vd d represent levers, which are pivoted at d d to ears formed on the receptacle a. Said levers are provided with short arms or projections cl2, which are engaged with the shoulder c2 on the nut c, as shown in Figs. 2 and `3, the arrangement being such that, when the levers d d are swung inwardly or toward each other, the short arms or projections d2 will exert a powerful pressure upon the shoulder c2 of the nut in the direction required to force the piston a short distance toward the nozzle of thereceptacle ct. The nut constitutes a bearing for the short arms or projections cl2 of the levers d, so that the inward movement of said levers imparts an endwise movement to the nut, and through the latter to the piston.

It will be seen that the engagement of the levers d cl with the nut c is such that the nut can be readily rotated; consequently, when the operator desires to use thedevice, he inserts the nozzle a in the orifice to be mended, then rotatesthe nut c until the piston bears firmly on the viscid material in the receptacle, and then applying pressure to rthe levers d, swings said levers inwardly, thus giving the piston a forward movement under strong pressure, and causing the cement to entirely fill or be forced under suitable pressure into the orifice. When the levers are released and swung outwardly the operator rotates the nut in the direction required to force the shoulder c2 of the nut back against the outwardly swung arms or projections d2 of the levers, and the levers are again enabled to impart an additional forward movement to the nut and piston. The operation is thus continued, the piston being moved forward step by step, each adjustment of the nut enabling the levers to again move the piston forward until the material has been entirely used.

We do not limit ourselves to the details of construction here shown, and may variously modify the same, Without departing from the spirit of the invention. For example, a handle or hand-rest, rigidly connected to the re- IOO e I l 495,45@

ceptacle ct may be substituted for one of the levers d, the other lever, engaged as described with the nut, being relied upon to impart the desired additional movement to the nut and piston.

' We do not limit ourselves to the employment of the levers (Z d, as the device can be operated to eject the cementsimply by the rotation of the nut, although not with as much force as by the successive employment ot the nut and levers. In case the levers are not employed, some means would be required to prevent endwise movement of the nut, and permit its free rotation.

Ve claiml. A tire-inending device comprising a receptacle having` an attenuated outlet nozzle at one end, one or more power-applying levers pivoted to the receptacle, and a piston movable in the receptacle and provided with an adjustable bearing for said levers whereby the levers may be caused to advance the piston in the cylinder, step by step, as set forth.

2. In a tire-mending device, the `combination of a receptacle having an outlet at one end, a piston movable in said receptacle and provided With a screw-threaded shank, a nut engaged with said shank and having a limited endwise movement, and one or more levers pivoted to the receptacle and engaged as described with the nut, whereby endwise pressure may be exerted on the nut, as set forth.

In testimony whereof we have signed our

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