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Publication numberUS725290 A
Publication typeGrant
Publication dateApr 14, 1903
Filing dateJul 12, 1901
Priority dateJul 12, 1901
Publication numberUS 725290 A, US 725290A, US-A-725290, US725290 A, US725290A
InventorsJohn Speer
Original AssigneeJohn Speer
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 725290 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

PATENTED APR. 14, 1903.







SEEGIFICATION forming part of Letters Patent No. 725,290,1dated April 14, 1903. Application filed .Inly 127.1901. Serial No. 68,028. I(lilo model.)

T0 @Z5 wiz/0771, fm/(ty concer/L.' Be it known that I, JOHN SPEEma citize of the United States of America, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Locks; and I do hereby declare the following to be a full, clear, and exactdescription thereof, reference being had to the accompanying drawings,

which form a part of this specification.

This invention relates to certain new and useful improvements in locks for couplings and valves, and has for its object the provision of novel means whereby couplings are securely locked and cannot be removed from the pipe unless the lock is first removed.

The invention further aims to apply the device to valve-stems and the like, preventing the same from being tampered with by outside persons.

Heretofore it has been a difficult matter to control the supply of gas and the like, the couplings being tampered with to make counections before the gas enters the meter and also close certain valves to diminish the supply of gas and the like.

It is the object of the present invention to overcome all such difficulties by providing a lock that will render bot-h the couplings and valves inaccessible unless the lock is first removed.

With the above and other objects in view the invention consists in the novel combination and arrangement of parts to be hereinafter more fully described, and specifically pointed out in the claims.

In describing the invention in detail reference is had to the accompanying drawings, forming a part of this specification,aud wherein like numerals of reference indicate corresponding parts throughout the several views, in Which- Figure l is a side elevation of a pipe, showing in dotted lines a coupling or union having my improved lock applied thereto in position. Fig. 2 is a plan View of the lock proper with myimproved lock removed therefrom. Fig. 3 is a side elevation of the valve, showing in vertical section the valve-stem having my improved lock applied in position thereto. Fig. 4. is a plan view looking into one of the hinged sections forming the lock. Figs.

and G are side elevations of the lock valvecasing as shown in Fig. 3 of the drawings.

In the drawings the reference-numeral l indicates the two sections of pipe having a coupling 2 interposed therebetween.

lhe lock or casing is composed of two sections 3 and 3, section 3 carrying an integral contracted extension e at its upper end. At the upper extremity of this extension is a hook portion 4. Section 3' likewise carries an extension 3, which is cutaway vto receive the extension 4 and the hook portion 4,which engages with a cross-piece 4, carried by the extension 3, forming a hinge connection between the two sections when in theirnormal position. The lower extremities of these two sections are provided with extensions 6 and 7, having registeringapertures for the reception of the padlock 5. Extension 3" extends outwardly and then forward at a substantial right angle to the major portion of the extension, the cut-away portion of this extension forming legs which engage the upper portion of the extension 4.. The crosspiece 4" is located or formed integral with the extension 3" at the outer end of the rightangular portion thereof and extends sufficiently below the upper end of this right-angular member to permit the hook 4' to seat on theupper side of this cross-piece, the hook engaging between the legs of the extension 3 and extending flush with the upperend of the extension 3. Thus the hook portion is incased 4by the extension 3 and is consequently protected by the latter. rlhe said casing 3 and 3 when closed entirely incases the coupling,said casing having formed thereinsuitable openings 9 to allow the pipe to pass therethrough. p

The reference-numerallO indicates a collar when the device is to be applied to a valve, as shown in Fig. 3 of the drawings.

The manner ofoperating my improved lock is as follows: The two sections being hinged together are slipped over the pipe inelosing the coupling and are then securely locked together by means of the padlock, as shown in Fig. l of the drawings. The coupling cannot be tampered with, as will be readily understood.

The device, as shown in Fig. 3of the drawings, merely carries a head 10, performing the ICO same function upon the valve-stem as heretofore described for inclosing the coupling. The said valve-casing is preferably formed as illustrated in Figs. 5 and 6 of the drawings, although the latter may be modified in varions ways without departing from the general spirit of my invention.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. A device of the type set forth, comprising a casing formed of two sections, an outward-contracted extension carried by one end of one of the sections and having a hook portion formed integral with its outer end', an outward extension of greater width than the first-named extension formed integral with the other section, said last-named extension being cut away to form legs between which said contracted extension is received, the upper end of the second-named extension extending forwardly at right angles to the said legs thereof, a cross-piece carried by the said.

right-angular portion ofthe said extension on its outer end, and being located below lthe upper side of the said portion, to receive the hook portion and permit the latter to extend flush with the upper sides of said rightangular portion, and outward-extendingapertured legs carried on the opposite ends of the sectending below the hand-wheel of the valvestem, and a second casing comprising two sections having a hinged connection with each other, one of saidlast-narned sections having a head-formed integral therewith,said head being apertured and engaging over the upper end of sa'id first-named casing and seating on the upper edge thereof, and a lock for securing the sections of the first-named casing together.

In testimony whereofl have hereunto affixed my signature in the presence of two subscribing witnesses.




Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3678717 *Nov 27, 1970Jul 25, 1972Eaton Randell CCoupling guard device
US4300373 *Jan 29, 1979Nov 17, 1981Camos Walter MWell Christmas tree guard apparatus
US4366970 *Aug 15, 1980Jan 4, 1983Hogan Jr Robert JTheft prevention method and apparatus for wellheads
US4458923 *Jun 19, 1981Jul 10, 1984Burroughs Robert EFire hose locking device
US4541256 *Jan 31, 1983Sep 17, 1985John GreenFlange lock
US4587814 *Jun 8, 1984May 13, 1986Designs Unlimited, Inc.Mechanical security device
US4803858 *Apr 11, 1988Feb 14, 1989Parker Frank IGarden hose protector
US4826215 *Oct 23, 1987May 2, 1989Sullivan Samuel RClamp
US4852403 *Apr 21, 1987Aug 1, 1989Bednarz James WWater meter lock
US4907450 *Sep 22, 1988Mar 13, 1990Bednarz James WLockable water meter expansion connection and method
US5033280 *Dec 7, 1989Jul 23, 1991Johnson James BSecurity lock
US5193366 *Dec 12, 1991Mar 16, 1993C. J. Winter Machine WorksHose securing device with dual lock feature
US5312139 *Aug 27, 1993May 17, 1994Micron Technology, Inc.Fluid line nut locking device
US5412962 *Dec 2, 1993May 9, 1995Thompson; Robert A.Safety locking devices for PVC ball valves
US5806555 *Jan 31, 1997Sep 15, 1998Spears Manfacturing Co.Locking device for valves
US6644075Aug 20, 2002Nov 11, 2003Danny B. ThompsonFlange locking device
US6997420Sep 3, 2003Feb 14, 2006Panduit Corp.Pneumatic lockout device
US7044148Feb 27, 2004May 16, 2006Sabber Design & ManufacturingApparatus and method for selectively securing a valve in an open or closed position
US8201506 *Apr 9, 2009Jun 19, 2012Parlapiano John PPortable anti-theft device
US8561635Aug 18, 2010Oct 22, 2013Wcm Industries, Inc.Hydrant security system
Cooperative ClassificationF16B41/005