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Publication numberUS1151304 A
Publication typeGrant
Publication dateAug 24, 1915
Filing dateMay 14, 1915
Priority dateMay 14, 1915
Publication numberUS 1151304 A, US 1151304A, US-A-1151304, US1151304 A, US1151304A
InventorsMike J Svoboda
Original AssigneeMike J Svoboda
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Safety-lock for gas-valves.
US 1151304 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)




1 1 5 1 34., Patented Aug. 24, 1915.



Specification of Letters Patent.

Patented Aug. 24, 1%15.

Application filed May 14, 1915. Serial No. 28,099.

To all whom it may concern Be it known that 1, MIKE J. SVOBODA, a citizen of the United States, residing at Chicago, in the county of (look, State of Illinois, have invented certain new and useful Improvements in Safety-Locks for Gas Valves; and I do hereby declare the follow ing to be a full, clear, and exact description of the invention, such will enable others, skilled in the art to which it appertains to make and use, the same.

This invention relates to new and useful improvements in devices for locking the valves of gas cocks against accidental displacement.

It is the object of the present invention to provide such a locking means which may readily be associated with gas fixtures of the usual and conventional type whereby upon the valve beingturned to closing position, said means will engage it an d positively lock it against turning back to open position until said locking means is actuated to a releasing position.

It is further the object to so mount this locking member that any accidental move- .ment tending to turn the valve to. open position, cannot engage the locking member to move it to releasing position.

With the above and other objects and advantages in view, the invention resides more particularly in the novel combination, formation and arrangement of parts as more fully described hereinafter and pointed out in the appended claims.

Reference is had to the accompanying drawings, wherein similar characters of reference designate corresponding parts throughout the several views, and in which:

Figure 1 shows the embodiment of the invention as applied to that type of gas fixture'having the valves positioned adjacent the outer ends of the branch arms thereof; Fig. 2 shows the eu'ibodim'ent of the invention as applied to that type of gas fixture having its valves positioned .at the inner ends of the arms adjacent the main or supporting pipe; Fig. 3 is a bottom plan View of the structure shown in Fig. 1 and Fig. 4: is a perspective view of the clamp used in connection with the present device.

Referring now more particularly to the accompanying drawings, and particularly to the embodiment of the inventionas illustr:1" ed in Fig. 1,'5 designates one ofthe arms of a gas fixture having adjacent its outer end a conventional valve including the casing 6 through which extends the stem 7 carrying the finger piece 8 and provided with a pin 9 which slide in a slot or recess 10 in the casing to limit movement of the valve in the usual manner. The improved locking means comprises a clamping portion includmg a pair of members 11 each having its intermediate portion oppositely bowed to embrace the arm 5 and having one end portion provided with a transverse groove 12 ooacting with the groove of the other member to form an opening in which is disposed the locking pawl 13 of the device. Clamping bolts 14 are passed through both end portions of these members to securely clamp them on the arm, and, one of the bolts passes through the said opening and serves to pivotally hold the pawl. The members are disposed in a horizontal plane, and consequently the pawl swings horizontally and its engaging end is downwardly oflset to eX- tend into the recess 10. The pawl is normally urged intothis recess by a leaf spring 15 having one end secured to the grip end of the pawl and bearing at its other end against the arm. Thus when the valve is turned to closingposition, the lug 9 engages the pawl with a cam action and raises and as the lug moves to closing position, the pawl springs into the recess to lock the pin, and the valve cannot be actuated to open position until the pawl has been gripped and moved to releasing position. As the pawl swings in a horizontal plane, it will not be subjected to the possibility of being accidentally operated by engagement of any member therewith which might also actuate the valve.

In the structure shown in Fig. 2, the valves 16 are positioned too near the supporting pipe 17 of the fixture to permit this structure being used, and in this instance the clan'iping members 11 are positioned outwardly of the valves and the locking pawls 1.3 are extended inwardly toward the valves and have their engaging ends provided with recesses l8 to lockingly receive the pins 9, the end faces of these members being beveled at 19 to permit a cam action of the pins upon moving to a position in which the valves are closed.

An exceedingly simple device has thus beem'provided which may be very readily attached to a gas fixture of the usual type and which will efliciently act to automatically lock the valves closed so that a person need have no fear of the valves becoming accidentally open, as by the operators hand accidentally moving it after having once turned the valve.

What is claimed is l. A device of the class described comprising a clamping portion. adapted to engage a pipe arm, a locking pawl pivoted to said clamping portion and. adapted to swing in a horizon il plane and having its engaging end oil '0 engage the pin of a gas valve, and a spring secured to the pawl and adapted to engage said pipe arm to urge the pawl to locking position.

device oi? the class described combrace a pipe and their end portion recessed to form an opening, a locking pawl passed I through the opening and having one end olfset, clamping bolts passed through the ends of said members, one of said bolts passing through the opening and engaging the-pawl to pivotally secure it and a spring secured to the pawl for urging it tolocking relation.

In testimony whereof, I ailix my sigrla ture, in the presence of two witnesses.

- MIKE J. SVOBODA Witnesses: I

STANIsLAvE J. D'voi-ziug, JOSEPH F. Hammer,

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US5008650 *Sep 21, 1989Apr 16, 1991Hoiberg Dane ALeak damage prevention system
US8402798Apr 28, 2008Mar 26, 2013Master Lock Company LlcLocking clamp
U.S. Classification251/92
Cooperative ClassificationF16K35/02