US921692A - Swingletree safety-socket. - Google Patents

Description

W. G. GRAHAM. SWINGLE'IREE SAFETY SOCKET. APPLICATION FILED SEPT. 26, 1908.

Patented May 18, 1909.

WITN SSES INVENTOR MBW UNIT SaTAEEi WILLIAM GEORGE GRAHAM, OF WINNIPEG, MANITOBA, CANADA.

SWINGLETREE SAFETY- 00K131.

- Specification of Letters Patent.

Application filed September 26, 1908.

Patented May 18, 1909.

Serial No; 45 L9 2? To all whom it may concern:

Be it known hat I, WILLIAM Gnoner. GRA- HAM, of the city of il innipeg, in the Province of Manitoba, Canada, have invented certain new and useful Improvements in Swingletre Safety-Sockets, of which the following is the specification.

lriy invention relates to sockets especially to those applied to swingle or double trees for receiving the tugs of the ordinary harness, and the object of the invention is to provide a safety attachment on the socket whicl'r will effectually prevent the tug from becoming disattached from the socket when in use.

A further object is to provide an attachment of this kind which is simple and easily operated and which is constructed so as to allow it to be manufactured at a reasonable cost.

My invention consists essentially in a socket having a T-shaped extending end, an L-shaped locking pin pivoted to the socket and adapted to engage with the T-shaped end, and an extending spring secured to the pin and engaging with the socket, the parts being arranged and constructed as hereinafter more particularly described.

Figure 1 is a perspective view of a portion of a swingletree and the socket with my device attached. Fig. 2 is a vertical sectional view longitudinally through the socket, the spring, and a portion of the pin, the pin being in what is termed a closed position. Fig. 3 is an enlarged detailed perspective view of the locking pin detached. Fig. 4 is an enlarged detailed perspective view of the spring detached.

In the drawings like characters of reference indicate corresponding parts in each figure.

1 represents a portion of the swingle-tree to the end of which is attached in the usual manner the socket 2. The socket has an extending T-shaped end 3 designed to receive the tug A, shown dotted, of a set of harness in the usual manner. The end has a portion notched away at 4 which is formed by first cutting the arm vertically and then horizontally. The body of the socket at the upper side is flattened as at 5 and a horizontal hearing face is made at 6 immediately adjoining the T -shaped end.

7 is a locking pin which is L-shaped in form and has a slight shoulder 8 formed thereon, the portion beneath the shoulder forming a spindle 9 which is received within a vertically directed opening 10 formed in the socket. The opening 10 passes through the socket from th center of the iorizontal hearing face 6. The horizontal arm of the locking pin is notched awa at 11 supplementary to the notched portion 4 so that when the pin is turned into engagement with the end 3 the notched portions close together forming a neat joint. The spindle 9 is squared at 12 immediately beneath the shoulder.

13 is a fiat spring arched centrally and having the one end provided with a square opening 14 and the other indented at 15, the indenture passing in the opposite direction from that of the arch in the spring. When the spring is in position the end with the squared openin 14 is fitted to the squared portion 12 of the spindle so that when the spring is turned the locking pin is rotated. When securing the portions to the socket the s ring is first placed on the pin and the spinc le is then inserted within the opening 10 the parts being firmly secured by flaring the end of the spindle or riveting it to the socket.

An opening 16 is formed in the socket to receive the indented portion 15 of the spring when it is brought to the closed position. The extending end of the spring is bent at 17 in any suitable manner to allow it to be gripped conveniently.

In using the safety socket the tug is first placed on the T-shaped end in the ordinary way and then the spring is turned till the indenture enters the opening 16; it will be understood that there is sufficient resiliency in the spring to retain it in closed position. When the spring is locked in this manner it is im ossible for the pin to turn and consequent ly for the tug to escape.

It will be necessary of course to rivet the pin tightly, when manufacturing, in order to prevent any play of the spring.

What I claim as my invention is;

1. The combination with a swingle-tree of a socket having a T-shaped head at the end thereof, a swinging retaining arm pivotally connected to the socket and adapted to cooperate with the T-sha ed head to hold the trace thereon, and a eaf spring having one end rigidly connected to the retaining arm and means for locking its other end to the socket to lock the retaining arm in locking position, substantially as described.

2. In a device of the class described the combination with the swingle-tree having an extending T-shaped end, of an L-shaped pin pivotally secured to the socket by a riveted spindle passing into and through the socket, the said pin" having a shoulder thereon and being squared beneath the shoulder; an extending arched spring having an opening in one end adapted to fit the squared portion of the pin and the other end designed to engage with the socket to hold the projecting end of the arm in engagement with the ex tending T-shaped end, as and for the purpose specified.

3. In a device of the class described the combination With the swingle-tree of a socket having an extending T-shaped end there being a portion of such end notched away, the said socket having the body thereof flattened at its upper side and a horizontal bearing face formed on the body portion adjacent the extending T-shaped end and being provided with an opening in its flattened face; an L-shaped pin, rovided with a supplemental notch, pivotally secured to the socket, and having a shoulder thereon with a squared portion directly beneath the shoulder, such squared portion resting on the bearing face aforesaid; and an arched spring having at one end thereof an opening fitting the squared portion of the pin and bearing on the bearing face, and the other end formed with an indenture adapted to enter the opening provided in the socket, as and for the purpose specified.

Signed at the city of IVinnipeg, this 10th day of August 1908.

WILLIAM GEORGE GRAHAM.

I/Vitnesses G. J. THOMSON, GERALD S. RoxBUReH.

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