US811751A - Gearing. - Google Patents

Description

No. 811,751. PATENTED FEB. a, 1906. F. M. STAMBAUGH.

GBARING.

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FRAwms. M. STAMBAUGH.

ATTY s No. 811,751. PATENTED FEB. 6, 1906.

P. M. STAMBAUGH.

GEARING.

APPLIGATIOK FILED HAHHI. 1905 2 BHBETB -BHBET 2.

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FRANCIS M. STAMBAUGH.

UN ITED STATES FRANCIS M STAMBAUGQ. OF ST. LOUIS, MISSOURI, ASSIGNOR TO THE AlVlEltlOAN BRAKE COMPANY, OF ST. LOUIS, M ISSOURI, A CORPORA- T ION OF MISSOURI.

GEAFHNG.

Specification of Letters Patent.

Patented Feb. 6, 1906.

1'0 all whom it ntrty concern.-

Be it known that I ,FRANoIs M. STAMBAUGU, a citizen of the United States, residing at St. Louis, Missouri, have invented a certain new and useful Improvement in Gearing, of which the following is a full, clear, and exact descri ition, such as will enable others skilled in the art to which it appertains to make and. use the same, reference being had to the accompanying drawings, forming part of this specication, in which Figure 1 is a side elevational view of my improved machine. Fig. 2 is a sectional view on line 2 2 of Fig. 1. Fig. 3 is a sectional view on line 3 3 of Fig. 2, and Fig. 4 is a to plan view of the parts shown in Fig. 3.

This invention relates to a new and useful improvement in a machine for assembling part of a slack adjuster, particularly the clevis on the threaded rod, the object being to firmly screw the clevis onto the rod while the rod is held in a vise and by so forcibly driving the clevis home avoid the use of cross pins or keys for permanently connecting the clevis to the rod. Heretofore these parts have been assembled by hand but it is obvious that the ap lication of manual power to force the clevis ome is not only tiresome, but the length of thewrenchdiar necessary to apply the required power to the clevis renders such manual assemblage awkward.

My present invention consists in the construction, arrangement, and combination of the several parts, all as will hereinafter be de scribed, and afterward pointed out in the claim.

In the drawings, 1 indicates a frame carrying a stationary visej aw 2, preferably faced with Babbitt metal, so as to avoid mutilation of the threads of the rod 3, which is clamped thereon and upon the end of which a clevis 4 is to be secured.

5 indicates a movable vise-jaw, also faced with Babbitt metal where it engages the rod 3, said movable jaw being carried by a crosshead 6, connected to rods 7, assing down through suitable guides on the ame I. The lower ends of these rods 7 are ivotally connected to iinks 8, forming mem ers of a compound toggle, said links 8 being pivotally connected at the connecting-points of levers 9, having fixed fulcrums on parts of the frame I, while levers 10 are connected to a pistonrod II. Rod. 11 has a head at its upper end operating in a cylinder 12, under which is an ranged a spring 13. A pipe 14, leading from some suitable source of compressed-air supply, is provided with a three-way valve 15, whereby pressure is admitted to and exhausted from the cylinder above the head of the piston.

16 indicates a pulley having a friction-face, with which cooperates a friction-clutch 17.

Pulley 16 is loosely mounted on shaft 18,,

while the clutch is keyed to said shaft and longitudinally movable with respect thereto.

19 indicates a spring follower slidingly mounted on shaft 18 and bearing against a spring 20, whereby yielding .ressure may be exerted against the friction-c utch I7. Afoot treadle 21 is designed to be operated by the operator in yieldingly pressing the clutch 17 against the friction-face of the pulley. Shaft 18 is provided with a pinion 22, meshing with a gear 23, whose shaft is provided with a ton 'ued mandrel 24.

The operation is as follows: The clevis is first introduced onto the tongue of the man drel, which normally is at rest. The threaded bar 3 is now placed between the vise-j awe and adjusted in the proper position. The tapped opening in the clevis for receiving the bar 3 is preferably tapered-slightly, so that the clevis can he firmly driven home. When the bar 3 is in position, valve 15 is operated to admit pressure on top of the piston, which transmits motion through the compound to gle leverage to the movable viseaw, firm y clamping the rod 3 in position, the power applied to the vise-jaw and the extended area of said jaws preventing the rod 3 from being rotated during the time that the clevis is being secured in position thereon. The operator now de resses the treadle 21, with a result that t e mandrel 24 is rotated in the proper direction to screw the clevis onto the rod 3, the operator of course properly adjusting the clevis so that its tapped opening wiil receive the threaded end of rod 3. The clevis will be screwed home until the tapered open ing prevents further movement eXce t by the a piication of greater power, and ierein lies th s value of the yielding pressure on the friction clutch. The operator usually depresses the treadle 21 by foot, and the greater the weight applied. to the treadle the greater will be the frictional contact between the clutch faces, and conse uently the greater amount of power applied. In practice the operator practically puts most of his weight on the treadle, a heavy person of course causin the clevis to be more firmly seated home. Wlaen the clevis is seated home, it comes to a position of rest, indicating that it has been screwed in position as far upon the rod 3 as the power applied to the treadle 21 warrants, and thereupon the operator releases the treadle and exhausts the air from on to) of the cylinder, the spring 13 raising the re 11 and the movable vise-jaw enabling the 0 erator to remove the rod 3 and its attac ed clevis from the machine.

I am aware that minor changes in the construction, arrangement, and combination of the several parts of my device can be made and substituted for those herein shown and described without in the least departing from the nature and princi 1c of my invention.

Having thus descri ed my invention, what I claim as new, and desire to secure by Let ters Patent, is

In a machine of the class described, a mandrel, a shaft on which said mandrel is mounted, a gear on said shaft, a drive-shaft, a pinion thereon that meshes with said gear, a loose ulley mounted on said drive-shaft and rovi ed with a friction-face, a clutch memer splinecl to said shaft and having a cooperating friction-face, a follower reciprocatingly mounted on the drive-shaft, a spring surrounding the drive-shaft and interposed between the follower and the clutch member, and a lever in engagement with said follower and adapted to be actuated for moving the clutch member into engagement with the loose pulley and holding it there with a yielding pressure; substantially as described.

11 testimony whereof I hereunto afiix my signature, in the presence of two witnesses, this 3d day of March, 1905.

F RANOIS M. STAMBAUGH.

Witnesses:

EDWARD WILSON, GEORGE BAKEWELL.

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