US1255214A - Spring-dampener. - Google Patents

Description

J. F. O'CONNOR.

SPRING DAMPENER,

APPLICATION FILED SEPT. s. 1916.

m r .V. E, R m W 1. m d w A .W. 5 m J m m g C Y B m $M O Q %N JUHN 1E. WCONNOR, OF CHICAGO, ILLINOIS, ASSIGNOR T WILLIAM H. MINER, 0F 1 CHMY, NEW YORK.

SPRINGJDAMJPENER.

Specification of Letters Patent.

Patented Feb. a, rare.

hpplication filed september 5, 1916. Serial Ito. llhtlt.

' Chicago, in the county of Cook and State and dampener between the followers, said of Illinois, have invented a certain new and useful Improvement in Spring-Dampeners, of which the following -is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

This invention relates to improvements in spring dampeners.

The object of the invention is to provide a spring dampener suitable for use in draft.

riggings or other places where heavy shocks are encountered and which shall consist of few parts, simply arranged to efiectively minimize the recoil after the pressure on the parts has been released.

In the drawing forming a part of this specification, Figure 1 is a horizontal sectional view of a draft riggin showing my improvements adapted there 'or, the parts being in full release. Fig. 2 is a view similar to Fig. 1 but illustrating the position of the parts under full compression. And

'Fig. 3 is a vertical, transverse sectional View taken on the line 33 of Fig. 1.

In said drawing, 10-10 denote channel, center or draft sills, the same having secured to their inner faces rear stops 11 and front stops 12 with which cooperate a rear follower 13 and a front follower 14:, respectively. For operating the car, a yoke 15 is provided which surround s the followers yoke being riveted or otherwise suitably secured to a draw bar 16. All the foregoing parts are, or may be, of well known or desirable. construction.

The improved spring dampener, which is shown adapted for use in a draft rigging, comprises a pair of oppositely disposed, preferably counterpart cast heads 17-17; plates 1818; a spring 19; and a casing 20. Each of the heads-17 is preferably of substantia'lly cylindrical form, as clearly indicated in'Fig. 3, and on its inner face is provided with a recess of parti-cylindrical form with the axis of the cylinder extending in a horizontal plane at an angle to the axis of the gear. 'This recess designated 21 has its bottom face curved as indicated at 22 and against; which bears one of said? plates 18, each of the plates 18; having a correspond ingly curved outer face 23. The spring 19,

as shown, consists of an outer heavy coil 24:, intermediate coil 25 and inner coil 26, the latter being seated at its ends on suitable bosses 27 formed on the inner faces of the .plates 18. The inner faces of each of the heads 17 are disposed at an angle to the axis of the gear as indicated at 28, this being done in order to providea larger surface for theplate 18 to work upon, as will be understood from the position of the parts shown in Figs. 1 and 2. The heads 1717 are surrounded by the casing 20 which preferably is in the form of a steel tube, said casing overlapping each of the :heads 17. 'To maintain the casing in proper position relatively to the heads 1717 and also to limit the separation of the latter, each of the heads 17 is provided'with a longitudinal slot 29 on its exterior in which JE'GQIPIOCMZGS the inner end of a bolt or pin 30 secured to the casing.

The normal position of the parts is as shown in Fig. 1, wherein the heads 17 17 are separated a distance equal to the length-of stroke of the gear. Upon either bufl' or draft, it is apparentthat the heads 17-l7 will be moved toward each other and as this action occurs, the plates l818, together with the spring 19 will be rotated or oscillated about of the casing 20 at both ends with the fol- I lowers 13 and 14. It will also be noted that, as the heads 17-17 approach each other, there is a tendency to shift the same laterally relative to each other. This causes the heads 1717 to frictionally engage the casing 20 during the sliding movement, ,one of sad heads being forced against the easing on one side and the other head against the casing on the opposite side,'as indicated in Figs. land 2. Upon release of the pres sure, the s ring 19 will expand and 1n so doing it wlllforce the heads 17-17 apart. Dur ng this expanding action, it is apparent iii that the heads 17-17mm frictionally engage the casing 20 and at the same time the plates 18 will slide with respect to the heads 17. The amount of friction generated in this release action automatically and elliciently serves to dampen the recoil, to thus minimize, the recoil shock and prolong the life of the parts. 4

Although I have herein shown and described what I now consider the preferred embodiment of the invention, the same is merely illustrative and l contemplate all changes and modifications coming within the scope ofthe claims appended hereto.

I claim v 1. In a spring dampener, the combination with a" pair of oppositely arranged, normally separated heads, the latter having recesses on their opposed faces, each recess having a concave friction surface, of lates' frictionally engaging said surfaces an having convex friction surfaces, a spring extending between said plates,-and a floating casing encircling said heads, said heads frictionally engaging said casing upon relative longitudinal movement between the heads.

2. In a spring dampener, the combination .with a pair, of heads relatively longitudinally movable, said heads having recesses on their inner faces, of plates slidably mounted Within said recesses, a spring extending between said plates and adapted to be compressed upon relative approach of theheads, and a longitudinally movable casing encircling the heads and frictionally engaging the latter upon relative longitudina movement thereof.

In witness that I'claim the foregoing I have hereunto subscribed my name this 31st day of August 1916.

JOHN F. OGONNOR..

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