US1712498A

US1712498A - Automatic shut-off for liquid-delivery systems

Info

Publication number: US1712498A
Application number: US176256A
Authority: US
Inventors: John J Hawxhurst
Original assignee: LIQUID DISPENSING SYSTEMS Inc
Current assignee: LIQUID DISPENSING SYSTEMS Inc
Priority date: 1927-03-17
Filing date: 1927-03-17
Publication date: 1929-05-14
Anticipated expiration: 1946-05-14

Description

A 14, 1929. .1. J. HAWXHURST 1712'498 AUTOMATIC SHUT-OFF FOR LIQUID DELIVERY SYSTEMS Filed March 1'7, 1927 L la-:2. I

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IN V EN TOR.

' v MXQWA ATTORNEY' li utented May 14, 1929.

UNITED STATES PATENT OFFICE.

JOHN J. HAWXHURST, OF BROOKLYN, NEW YORK, ASSIGNOB, BY DIRECT AN D MEBNE ASSIGNMENTS, T LIQUID DISPENSING SYSTEMS, INC., 01 BROOKLYN, NEW YORK,

A CORPORATION OF NEW YORK.

AUTOMATIC SHUT-OFF FOR LIQUIIlD-DELIVERY SYSTEMS.

Application filed March 17, 1927. Serial No. 176,258.

This invention relates to the delivery and dispensing of liquids and the objects of the invention are to automatically shut 03 the source of supply in the event of injury or dans ger to the system and to provide the means ror this purpose in a simple practical form readily applicable to existing systems.

The foregoing and other desirable resuits are attained by certain novel features lo of construction, combination and arrangement of parts as set forth in the following specification.

The drawing accompanying and forming part of this specification illustrates an emodiment of the invention in one of its commercial forms, but it will be understood from thebroad spirit and scope of the following description and claims that the structure may be modified in various respects without departure from the true spirit and scope of the invention.

Figure 1 is an elevation of a delivery stand such as is used in the dispensing of gasoline and the like with a form of the invention in- 25 dieated in dotted lines as incorporated in the base of the stand.

Figure 2 is an enlarged broken sectional view of this particularform of the mechanism.

Figure 3 is a horizontal sectional view as on the plane of line 3-3 of Figure 2.

In the present illustration the invention is shown applied to and used in conjunction with a gasoline dispensing system, one of the delivery stands of such a system being indi cated at 5 and shown as having the usual hose 6 for delivering the liquid. The liquid is carriedto this hose by suitable piping 7 extending up through the stand.

it is reco ized that these stands constitute a considera le hazard. The hose is liable to be torn from its connections by careless handling and use and the supply line is liable to be broken or made to leak by collision with the stand. In the event of fire, the supply line constitutes an immediate and continuing menace.

These dangers are removed in the presnt invention by the rovision of valve meansin the supply line which automatically shuts ofi the supply of liquidin the event of any such hazards.

The automatic valve mechanism takes the form in the present disclosure of a valve cas- Eli all!

ing 8 having a through passage connected at 56 one side with the pi e 9 leadin from the supply tank and at t e other si e with the delivery line 7 extending up through the stand. This through passage is controlled by a valve 10 engageable with a seat 11 in a 00 transverse wall 12 across the passage and said valve is shown as carried by a stem 13 extendmg up through a suitable land or stufling box 14. This valve is of t e automatically closing type, made so b a spring 15 exerting lts force to shift the va ve in a seating direction and also by an adjustable Wei ht 16 on the long arm of a lever 17 pivote at 18 in a frame 19 and having a forked connection with the upper end of the valve stem at 20.

The automatic valve is normally held open, in the present disclosure, by a tumbler or trigger shown in the form of a rod 21 having a ball and socket mountin 22 in the frame and provided at its lower on with a pointed 76 termlnal 23 bearing on the reduced surface provided by the frusto conical upper end 24.- of the valve stem. The tri ger rod 21 extends up into the casing or hol ow column of the stand a suitable distance and carries some kind of a head adapted to be engaged by the stand in the event of any dangerous shifting of the same. This head is shown as consisting of a series of radiating pins 25 extending into close relation with the inner wall of the convergent portion of the standard. A relatively slight shifting of the standard, therefore, will suffice to throw the trip red one way or the other far enough to release the point of the same from holding engagement with the valve. The valve, therefore, will thus snap closed and shut oil the supply of liquid to the standard if the standard is shifted as by collision of a motor car therewith. Preferably, the parts are so designed and arranged that this automatic shut-off will be efi'ected before the shifting of the standard is sufilcient to actually injure the piping.

When the shut-oil valve snaps closed, as described, the supply of ii uid is automatical- 10o ly directed from t 1.6 stan through a pipe 26 entered in the bottom of the valve casing, which pipe may lead back to the supp tank. Entrance to this return pipe is shut o in the normal position of the parts by a valve face 106 27 at the under side of valve 10 enga ing a valve seat 28, the latter being provi ed at the inner end of a plug 29 screwed into the a 'to automaticafi y snap bottom of the valve casing and having a screw seat for the return pipe 26.

In the form of the invention herein disclosed, the same valve is utilized to guard the stand against fire hazards by making the upper end 13- of the valve stem as a separate part secured to the main body of the stem y an inclined soldered joint 30 constitutin a fusible link. The fusibility of this lin is such that at a predetermined temperature, the stem will 've way and permit the valve closed under power of the valve closing spr1n 15.

After the valve has con tripped the same may be restored to normal open osition by forcing down the valve stem, eit er directlyor by using the lever 17 as an operating handle, access being had through the base of the stand as b means of a suitable door 31 provided in the ase of the stand.

The automatic valve mechanism may all be located in a suitable well 32 provided in the concrete foundation 33 on which the stand is mounted.

What is claimed is:

1. In combination, a dispensing stand containing a liquid delivery line, valve mechanism at the foot of said stand controlling flow through said delivery line and mechanism affected by movement of said stand to control operation of the valve mechanism to automatically shut ofi' the supply of liquid, said valve mechanism further including means for automatically diverting liquid from the stand when the su ply to the stand is thus cut oil.

2. In com ination, a dis ensing stand containing' a liquid delivery me, automatically closing valve mechanism at the 'foot of said stand controlling flow throu h said delivery line and mechanism affected y 'movement of said stand to control operation of the valve mechanism to permit automatic closing of the valve mechanism, the control mechanism for said valve further including thermally responsive means foroverning automatic shut-ofi' action of the va ve.

3. An automatic shut-off for liquid delivery stations comprisin a valve casing adapted to be interposed in a iquid delivery line, a valve in said casing controlling flow therethrough, said valve havin a stem, a shiftable trigger engaged with sai valve stem to hold the valve open and means for automaticall closing the valve when the same is released by said triger, said valve casing having an outlet for y-passing the liquid from the dellvery line and valve means associated with said valve stem for closing said-outlet when the main valve is open and for opening said outlet when the main valve is closed.

4. An automatic shut-ofl' for liquid deliver stations comprising a valve casing adapte to be interposed in a liquid delivery line, a

valve in said casin controlling flow theretrigger engaged with said valve stem to hold the valve open and means for automatically closing the valve when the same is released by said trigger, the valve stemhaving a fusibly connected section adapted to ermit automatic closure of the valve un er predetermined heat conditions.

5. An automatic shut-oi! for liquid delivery stations comprising a valve casing adapted to be inter d in a liquid delivery line, a valve in sai casin therethrough, said valve aving a stem, a shiftable trigger engaged with said valve stem to hold the valve 0 en, means for automatically closing the va ve when the same is released by said trigger and a ivoted shifting lever connected with the va ve stem.

6. An automatic shut-otf for liquid delivery stations comprising a valve casing adapted to be interposed in a liquid delivery line, a valve in said casing controlling flow therethrough, said valve havin a stem, a shlftable trigger engaged with sai valve stem to hold the valve open, means for automatically closing the valve when the same is released by said trigger and a pivoted shiftin lever connected with the valve stem, said ever carrying a weight for assisting in closing the valve and serving also as a handle for shifting the valve in the opening direction.

7. An automatic shut-ofi' for liquid delivery stations comprising a valve casing having a through passa and a return passage, valve means in sai casing for.clos1ng one passage while openin the other, a mechanical tri er and thermal y responsive means for tions and means for automatically shi ing controlling flow the valve means to the other of such positions when permitted by either the mechanical trigger or the temperature res nsive device.

8. An automatic shut-ofi for iquid delivery stations comprising a valve casing having a through passage, a valve in said casing controlling said assage and provided with a stem, a shifta le rod engageable with said stem to hold the valve open, means for shifting the valve closed when released by said rod, said rod having ortions for engagement by a part which is to protected.

9. An automatic shut-ofi for liquid-delivery stations comprising a valve casing having a through passage, a valve in said casing controlling sai passage and provided with a stem, a shiftable rod engageable with said stem to hold the valve open, means for shifting the valve closed when released by said rod, said rod having portions for engagement by a part which is to be protected, the valve stem and rod having engagin portions of reduced cross sectional area an the stem having a fusibly connected end portion.

In witness whereof, I have hereunto set my hand this 15th day of March, 1927.

JOHN J. HAWXHURST.