US1408961A

US1408961A - Liams

Info

Publication number: US1408961A
Authority: US
Publication date: 1922-03-07
Anticipated expiration: 1939-03-07

Description

8. A. WILLIAMS.

TOOL.

APPLICATION FILED AUG-4| I920.

1 40 9 1 Patented Mar- 7, 1922'.

z'Z Z3 Fy Z UNITED s'rATss PATENT OFFICE.

SHELDON A. WILLIAMS, OF DES MOINES, IOWA, ASSIG-NOR OF ONE-HALF TO HARRY F.

WI-IEATON, OF DES MOINES, IOWA.

TOOL.

Specification of Letters Patent.

r Application filed August 4, 1920. Serial No. 401,149.

To all to item it may concern Be it known that I, SHELDON A. WIL- Lnmrs, a citizen of the United States, and a resident of Des Moines, in the county of Poll: and: Stateof Iowa, have invented a certain new and useful Tool, of which the following is a specification.

The object of my invention is to provide a tool of very simple and inexpensive construction, particularly adapted for use in shaping fiber gears.

It is quite common in automobile c0nstruction to connect the timer shaft with the engine shaft by means of a fiber gear mounted on the cam shaft. The fiber gear is mounted between two discs or plates, each provided with gear teeth, and the gear on the timer shaft, as well as the gear on the engine are of such width that they mesh only with the fiber gear on the cam shaft.

In the use of the fiber gear, the teeth gradually become elongated and project beyond the teeth of the discs between which the fiber gear is enclosed. When the fiber gear has become mis-shapened to a certain extent, it can not be longer used, and the common practice is to return it to the factory for exchange or credit or to re-shape it by an elaborate and expensive process with a lathe.

With these and other objects in view, my invention consists in the construction and arrangement and combination of the various parts of my device, whereby the objects contemplated are attained, as hereinafter more fully set forth, pointed out in my claims, and illustrated in the accompanying drawings, in which:

Figure 1 shows a side elevation of a por tion of a gear casing with parts of the gear casing shown in section, and parts broken away, with my improved tool installed thereon.

Figure 2 shows a detail, sectional view taken on the line 2--2 of Figure 1; and

Figure 3 shows an enlarged, side elevation of the roller device.

In the accompanying drawings, I have used the reference numerals 10 and 11 for indicating the lower and upper casing members at the front end of an engine.

Extended through the casing formed by the members 10 and 11 is an engine shaft 12, on which is a pinion 13. Connected with the casing 11 and extending away therefrom is a casing 14;. The casing 14: has therein, spaced from the casing 11, an opening 15, which is ordinarily covered by casing member. j

The timer shaft extends into the opening 15 and ordinarily has on ita'gear, not here shown.

Extending through the casings 11 and 14 is the cam shaft 16, on which is the fiber gear 1?, on the oppositesides of which are

metal discs

18 and 19, having teeth on their periphery, which corresponds with the teeth of the fiber gear.

It is found in the use of the fiber gear interposed between the two metal gears, that th teeth of the fiber gear become gradually forced outwardlyand misshapened. The teeth then extend beyond the teeth of the

discs

18 and 19, as illustrated for in stance at capital A in Figure 3.

In order to reduce these fiber gear teeth to proper shape the ordinary practice, as has already been said, is to entirely remove the fiber gear, re-shape it, and then put it back in position. Frequently the fiber gear can not be repaired at all.

For reducing the teeth of the fiber gea to their normal shape, I have provided a special. tool, which includes a cross bar 20, through which are extended bolts 21. These bolts are extended through holes in the casing 14, which ordinarily receive the bolts for the cover for the opening 15.

The bar 20 is formed with a bearing 22 for a shaft 28. Extending away from the shaft 23 at right angles thereto is a handle 2 1'. Extending away from the shaft 23 in the opposite direction from: the handle 24 and parallel therewith is an arm 25 on theend of which is a spindle 26, arranged at right angles to the arm 25, as shown, for instance, in Figure 2.

On the spindle 26 is a roller 27, which may be made of steel or other material, harder than the fiber gear.

The engine shaft is rotated in any suitable way in the use of my tool and it will be seen that the fiber gear will then be rotated from the pinion 13. The handle 24 is then grasped and the roller 27 is held against the teeth of the fiber gear, as illustrated in Figure 3.

In Figure 3, I have shown at capital A, the fiber teeth projected beyond the teeth 18 of the disc 18, while at capital B, I have shown the fiber discs after my process Patented Mar. '7, 1922.

' in Figure 3 to their-shape shown at B is not accorr rplished atone revolution of the fiber gear, but Ihave made the showing in Figure 3 for the purpose of properly illustrating the condition of the fiber gear before and after, the practice of my process.

here my toolis used, it is only necessary to remove the cover from the opening 15 and to remove the gear on the timer shaft and install my tool. Then when the engine shaft is rotated, the roller 27 may be held against the teeth of the fiber gear, until such teeth are reduced to their normal shape and slze. p 7 g It is obvious that it is unnecessary to remove the fiber gear from; the engine and that the ent re re-shaping of the teeth of the fiber gear may be very "quickly and inexf pensively accomplished, when my process is compared with the old Way of accomplishing the same purpose.

t Will be made in the construction of the tool without departing essentially from the real spirit and purpose of my invention. 7 Iclaim: j

1. In a device of the class described, a supporting member havingabe'aring, a shaft ,mounted in said bearing, arms extending from said shaft in substantially opposite d rect ons, a spindle on one of sald arms arranged at right angles to the arm, and a roller on sa d spindle,

52-. in a device of the. class described, the

combination of a fiber gearhaving metal be seen that some variations may discs at its sides, provided with teeth corres 'ionding' with the teeth of the fiber gear, a metal gear 1n mesh with the fiber gear, a

supporting member having'a bearing,a shaft mounted in said bearing, arms on said'shalft, and aspindle on one of said arms, having thereon a rotary device adapted tojbe pressed against the teeth of the fiber gear.

Moines, Iowa, July 26, 1920.

SHELDON A. WILLIAMS.

Des