US769830A - Shut-off. - Google Patents

Description

No. 769,830. PATENTED SEPT. 18, 1904. J. G. NEHRBAS.

SHUT-OFF.

APPLIOATION FILED DBO. 24. 1902.

N0 MODEL.

B V x/ I if is 10/ 4 A lllllllliwl INVENTOR.

llnirnn STATES Patented September 13, 1904.

JOHN GEORGE NEHRBAS, OF SEATTLE, WASHINGTON.

SHUT-OFF.

SPECIFICATION forming part of Letters Patent No. 769,830, dated September 13, 1904.

' Application filed December 24, 1902. Serial No. 136,481. (No model.)

To all whom it may concern.-

Be it known that 1, JOHN GEORGE NEHRBAs, a citizen of the United States of America, and a resident of the city of Seattle, in the county of King and State of Washington, have invented certain new and useful Improvements in Shut-Offs, of which the following is a specification.

My invention relates to improvements in hose shut-offs, and has special reference to a powerful device of this class especially useful in lighting fires.

Among numerous objects attained by this invention and readily understood from the following specifications and 'accompan yin g drawings, included as a part thereof, is the pro duction of a simple, durable, and inexpensive hose shut-off embodying essential features of adaptability, utility, and general efliciency which facilitates the application of the device to hose, renders it easy of operation, and positive and powerful in action.

The above-mentioned, and numerous other objects equally as desirable, are attained by the constructions, combinations, and arrangement of parts as disclosed on the drawings, set forth in this specification, and succinctly pointed out in the appended claims.

1V ith reference to the drawings filed herewith and bearing like reference characters for corresponding parts throughout, Figure 1 is a perspective view of my improved hose shutoff with the parts in relative position when the device is in position for clamping a hose and indicated with a section of hose inserted and a portion of the operating-lever broken away. Fig. 2 is a side view of the device indicated in vertical longitudinal section with the parts in relative position when the clamp is fully closed. Fig. 3 is a View in end elevation of the device looking from-the left of Fig. 2, and Fig. 1 is a vertical transverse section Online f 4; of Fig. 2 and viewed as the arrows indicate.

This invention includes a suitable base, as 10, a pressure-plate 12, mounted on said base so as to swing relatively thereto, and means to forcibly close the pressure-plate upon the base and to secure it in closed position.

The base 10 comprises a rectangular plate of suitable metal having oppositely-disposed pintle-lugs 12 formed integral therewith at one end and which project upwardly and are suitably separated to receive therebetween a downwardly-projecting lug 15, secured to the pressure-plate 12 at one end, and a pintle, as 14, is engaged in suitable apertures in said lugs to conveniently form a hinge connection between the base and said pressureplate. This plate comprises a rectangular section of suitable metal conveniently formed with the under side or pressure-surface 16 convex, as viewed in cross-section, Fig. 4, so that the hose will not be too abruptly bent when squeezed between the plate and base.

The pressure-plate 12 is operated by means of a substantially L-shaped angle-lever 16, which is preferably-formed with the foot part curved upwardly relatively to the stem to conveniently elevate the toe portion above the with said part by passing it through a suitable aperture formed in the toe. adapted as convenient means for connecting said lever to base 10 and comprises a section of suitable roundrod bent to substantially triangular form, so that it will not become elongated by the strain imposed in use and will receive a wide hook at the base side, and this link is engaged at the apex with the lever and normally detachably engaged by the base side with a suitable hook-lug, as 18, formed integral with base 10 beneath the free end of plate 12. This hook 18, which underlies the pressure-plate, is spaced from the adjacent end of the base 10, so as to provide a portion 18, on which the operator places his foot to steady and hold the device when operating the pressure-plate to squeeze the hose, and said hook by underlying the pressure-plate will be engaged thereby on its movement toward the base-plate l0, and thus protect the hose from injury resultant from too great a squeeze.

It will be observed that the hook 18 has its open portion disposed toward the foot portion 18. Thus the broad lower end of the link 17, which prior to the coupling operation rests on the foot portion 18, can be readily pushed by the foot of the operator with the book 18, and the link by having a This link is heel, and a link, as 17, is pivotally engaged broad bearing-surface will be prevented from wabbling during such movement.

In the present embodiment lever 16 is permanently connected to the pressure-plate by means of a pivot 20, engaged in a suitable transversely-disposed aperture formed in the heel of the lever and like apertures formed in oppositely-disposed lugs 21, formed integral with the free end of said plate and between which lugs the heel is loosely fitted", so that the lever will swing freely on said pivot, which is suitably disposed to permit the stem of the lever to swing to a substantially horizontal position when the shut-off is closed, Fig. 2, and thereby carry the point of connection of the link with the foot of the lever over and past pivot 20, so that when the link is engaged with hook 18 and the device is closed upon a hose said link will stand at an angle relatively to a vertical plane, and thereby serve to secure the pressure-plate in clamping position.

The application of the shut-off to a hose will be readily understood, as it is simply necessary to raise the stem of lever 16 to a substantially vertical position and disconnect link 17 from hook 18, when the hose can then be placed between the base and pressureplate and the link reengage with hook 18. The device is then in position for clamping, and when it is desired to close the hose the stem of lever 16 is pressed downwardly upon the pressure-plate, and the lever is thereby made to force said plate toward the base through the medium of link 18, which is brought to an inclined position during final closing action of the lever and serves to secure the operating parts in closed position. When desired to open the shut-ofl, it is simply necessary to force the stem of lever 16 upwardly until link 17 is brought to a substantially vertical position, when pressure of the fluid in the hose will act to distend the hose to normal form at the point pinched by the shut-01f.

The device is simple of construction, has few parts likely to get out of order, and can be readily placed and removed relatively to a hose. Furthermore, it has a powerful and positive gripping action, is light in weight, and extremely useful when desired to shut off a hose to remedy a burst, lengthen the line, put in a Siamese or britch, and in many other tasks familiar to those engaged in fighting fires.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent of the United States of America, is-

1. A hose shut-off comprising a base having upwardly-extending pintle-lugs at one end, and an upwardly-projecting hook adjacent its opposite end, a pressure-plate having a downwardly-extending lug at one extremity pivoted to said pintle-lugs at a point above the base, said hook being engaged by the other extremity of said pressure-plate for limiting its movement toward the base, a lever pivoted to said last-named extremity of the pressure-plate, and having an angularlydisposed foot portion, and a link pivoted to said foot portion and being detachably engaged to said hook.

2. A hose shut-off comprising a base, a pressure-plate pivoted to one extremity thereof, a hook underlying said pressure-plate and being formed integral with said base, said hook being spaced from the other extremity of the base and thereby providing a portion to be engaged by the foot of the operator whereby the base is held in position, a link engaging said hook, and a lever pivoted to said pres sure-plate and being connected to said link whereby the pressure-plate is swung.

3. A hose shut-off comprising a base, a pressure-plate hinged to one end thereof, a hook carried by the base spaced from the other end thereof and having its open side facing the same, a lever pivoted to said pressure-plate, and a link eccentrically pivoted on said lever and having its lower portion enlarged to form a broad bearing-surface and being engaged in said hook.

Signed at Seattle, Washington, this 29th day of November, 1902.

JOHN GEORGE NEHRBAS.

Witnesses:

VVILLIs B. HEW, WILLIAM B. ALLIsoN.

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