USRE12035E - Twill-coupling - Google Patents

Description

Reissued Sept. 23, $82..

No. I2,035.

c. c. BRADLEY. THILL COUPLING.

(Application filed June 7, 1902.)

INK/112KB,

' ATTORNEYS.

WITNESSES:

UNITED STATES PATENT OFFICE. i

v CHRISTOPHER o. BRADLEY THlLL-COUPLING,

, OF SYRACUSE, NEW YORK.

SPECIFICATION forming part of Reissued Letters Patent No. 12,035, dated September 23, 1902. l 7

Original No. 697,603, dated April is, 1902. Application for reissue filed June 7,1902; Serial libs-110,692.

thin-couplings, having more particular rei erence-to thatclass in which the jaws are mounted upon a suitable thill or pole iron,

-' one the jaws being movable into and out of engagement with a draft bolt or knuckle attached to the front axle.

The object of this. invention is to provide means for controlling the movement of the movable jaw, which means isadapted for use with thill or thill-irons are'generally curved or bent to conform to the curvature of the-thiil or pole it is very difficult to properly bend the iron without changing the relative positions of the pivots of the movable jaw and operati r g-lever, andI therefore provide a suitable spring aetuated by the operating-lever and engaged with the movable jaw with a sliding contact, 50 that thejaw is free to move indepeinlently of the spring.

Referring to the drawings, Figure 1 is a side elevation of a thill-coupling embodying my invention. Fig. 2 is a longitudinal verticalsection through the parts seen in Fig. l,

the jaws being closed in Fig. 1 and opened in Fig. 2. parts seen in Fig. 1.

Similar reference characters indicate corresponding parts in all the views.

This invention eonsists,essentinll y, of a thill or pole iron 1, a, fixed jaw2, a movable jaw 3, (o

a. spring-arm 4, and an operating-lever 5.

Fig. 3 is an inverted plan of the DIVISION ii.

The thill 'mpole iron 1 may be of any dei sired form adapted to receive a tbill or pole f; and is provided witbldepemling ears or In; 7 and a pivolal pin 8, which is suitably se cured in the lower ends of said earsor lugs 7s,

The parts 1 and 2 are scoured in The usual, .nianneiby bolls or. equivalent, .l' astening t means 1), one of which serves to secure the one end of the spring-arm "i to the thill or, pdl'e iron 1. v I I The jaw 2 is preferably lixed and l'ormsan integral par! of the ihlll or pole iron 1 and; usually consists of a hook-shaped extre|nit yoi the iron l, having a concave lower face adapted to engage a draft bolt or k n nekle ,ll),l which is suitably secured in the front axle oil, the vehicle in any desired manner, not necessary toherein illustrate or describe. I i

The lower jaw 3 is pivotally secured at its front end to the thill-i'ron l. ata point between the d. rait-bolt l0 and pivotal pin 8 and is provided with a slot or guideway 12 for receiving the free end ofihe spring-arm 4', said movable jaw being also provided with a coneave engaging face forming a counter part of of the jaw 2 to engage the draft boltor k nuekle '10. 'lheslot or gnideway 12 is formed in the lower face of the jaw 3 and extends lengthwise oi the thill-iron between the lower face of the jaw proper and a suitable transverse pin or shoulder 13, said guideway being open at its front and rear ends for permitting the free movement of the spring-arm 4 therethrough, the upper and lower walls of,the slot or gnideway12 forming suitable bearings for the spring 4 to eii'eet the opening and elosingthe movable jaw as the spring is moved by or against its tension. This spring-arm 4 is secured at its forward end to the lower face of the thill-iron 1 by one of the bolts 9, and its free end extends rearwardly between the ears 7 and also through the slot or gnideway 12 between the shoulder 13 and adjacent face of the jaw 3, the free end of the spring being movable toward and away from the fixed jaw 2.

'lhelever 5 is pivotally mounted upon the pin 8 and is provided with'a cam-face 14,movable into and out of engagement with the spring-arm l, which is normally tensionod outwardly against the adjacent face j'of the lever 5.

In the operation of my invention when it whereupon the cam 14 engages the adjacentv face of the spring-arm 4 and actuates its free end toward the draft bolt or knuckle 10 against its own tension, and thereby forces the moviyble jaw 3 into engagement with the lower ace of said draft-bolt, the highest point of the cam 14 being rocked l'earvtyardly beyond the pivotal pin 8, and thereby automatically locking the lever 5in its operativevor lose d position and also holdingthe jaw u der a yielding pressure in its closed position, itbeing understood that the cam 14 engages the free end of the spring-arm 4 between its point of securement with the thill-iron and its point of engagement with the movable jaw The operation of my invention will now be readily understood upon reference to the foregoing description and the accompanying drawings, and it will be noted that one of the essential features of this improvement is the sliding engagement of the movable jaw with the yielding end of a spring-arm.

Having thus described my'invention, what I claim, and desire to secure by Letters Patent, is- I 1. A .thill-coupling comprising a fixed jaw and a movable jaw having a slot, a spring having one end inserted in the slot, the movable jaw having a lengthwise-slidingengagement with the spring, and a lever to act on the spring to close the movable jaw.

2. In athill-coupling, a fixed jaw andamovable jaw, a spring having one end fixed and its. other end free and bearing with a sliding engagement against the movable jaw, and a movable cam acting on the spring to close the aw.

3. A thill-ooupling comprising two jaws, one being movable and provided with separated bearing faces, a spring having one end fixed and its other end in sliding contact with said bearing-faces and tensioned to separate the jaws, and a lever acting upon and against the tension of the spring to close the jaws.

4. A thill-coupling comprising two jaws,'

one being movable and provided with sepa- Witness myhand this 4th day of June, 1902.

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