US154536A - Improvement in hose-couplings - Google Patents

Description

H. WOLF. Hose-Coupling.

N0.]54 ,536 Patented Aug.25,1874.

ATTEST:

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UNITED STATES HIRAM WOLF, OF ST. LOUIS, MISSOURI, ASSIGNOR TO MISSOURI WOLF AND PATENT OFFICE.

OALPHUNIA FITZGERALD, OF SAME PLACE.

IMPROVEMENT IN HOSE-COUPLINGS.

Specification forming part of Letters Patent No. 154,536, dated August 25, 1874 application filed May 8, 1874.

To all whom it may concern Be it known that I, HIRAM WOLF, of St. Louis, St. Louis county, State of Missouri, have invented a certain new and useful Improvement in Hose-Couplings, of which the following is a specification:

This is an improvement on that class of couplings in which the two members are con freeze in the dovetail, and would render the coupling difficult and less perfect.

The second part of my improvement con sists in providing the members of the coupling with slots to enable the key to be passed through to prevent uncoupling. The key has a side lug, and has upon the other side a spring by which the lug is caused to engage the side of the slot to'prevent the extraction of the key without the in-pressure of the sprlng.

In the drawings, Figure 1 is a perspective view. Fig. 2 is an end view. Fig. 3 is a side view. Fig. 4 is an axial section. Fig. 5 is a side view of the spring-key.

A and B are two similar necks, which en ter the ends of the sections of hose, and are secured thereto as usual by straps or wrapping. On the neck A is a flange, 0, having upon opposite sides dovetail lips or lugs D, to engage the dovetail edges 6 of the flange E upon the otherpa'rt of the coupling. d is an aperture in the central part of each lip D. These apertures are to destroy the harbor for mud which the dovetails would afl'ord if they extended all across the coupling, the said mud being liable to freeze hard in winter-time and make coupling difficult, whereas, with this aperture the holding surfaces of the dovetail groove are so short that the flange E would readily clear its way on entering. F F are lugs on the ends of the flange E to receive the blows of the hammer, where one is used in coupling or uncoupling. The flange E narrows toward the end F, which enters first, so that it as is driven in it becomes tighter, and

forces the face a against that, c, of the flange G. The faces a and e are not perpendicular to the axis of the coupling, but are inclined, as shown in Figs. 3 and 4. This inclination is such that a tensional strain upon the hose will tend to draw the coupling tighter. G and H are studs or projections upon one end of the flanges C and E, to indicate the proper position to enter the flange E between the lugs or lips D, the studs being in contiguity when the coupling is engaged. This is an important provision, as the couplings are often put together in the dark in cases of fires, and an indicator, such as G H, sensible to the touch, would save valuable time. In the face 0 is a circular groove containing a rubber gasket or packing, I, which is compressed by the face 6 to make a tight joint. Kis a springkey passing through a slot, L, in the flanges G and E. The key has a spring-back, k, and is recessed out on the front side, leaving at the .end a lug, It, so that the spring causes the lug to engage the edge of the slot and hold the key in place. The purpose of this key is to prevent the accidental disengagement of the coupling. The key may be attached by a chain, M. a

I claim herein as new and of my invention- 1. The dovetailed lips D, having orifices d, as described, in combination with the matching-flange E, for the purpose specified.

2. The hose-coupling A B, having flanges G E, and key-slot L, in combination with the spring-key K k, as and for the purpose set forth.

HIRAM WOLF.

Witnesses:

SAML. KNIGHT,

ROBERT BUENs.

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