US1050646A - Automatic gas cut-off. - Google Patents

Description

M. L. GROVE.

AUTOMATIIG GAS GUT-OFF. APPLIUATION FILED APR.6, 1912.,

1,050,646. l Patented Jan.14','1913.

9 I *gm gl' ji Jl v 5 7 Y 5V L4 5% .almf L9:5 5 I s ZW M70/mgm UNITED STATES PATENT oEEIoE.

MART-IN LUTHER GROVE, OF TYLERSBURG, PENNSYLVANIA, ASSIGNOR OF ONE-HALF T0 WILLIAM ALEXANDER WRAY .AND ONE-SIXTH TO ALBERT FOY, BOTH 0E TYLERSBURG, PENNSYLVANIA.

AUTOMATIC GAS CUT-OFF.

Patented an. 14, 1913.

To all whom t may concern Be it Aknown that I, MARTIN -LUTHER GROVE, a citizen of the United States, and a resident of Tylersburg, in the county of Clarion and State of Pennsylvania, have made certain new and useful Improvements in Automatic -Gras Cut-03sof which the following is a specification.

My invention relates to improvements in automatic gas cut-Otis, and it consists in the combinations, constructions and arrangements herein described vand claimed.

The object of the present invention is to provide a simple, efficient and comparatively inexpensive automatic gas cutoff having an inlet and an outlet and provided with means operable through an abnormal decrease in the tiow of the gas for closing the outlet, and equipped with separate means for producing a sub-normal flow within the cutoiin to cause an'operation of the said 'means when there is an abnormal. increase in the flow of gas through vthe inlet.

A further object of the invention is to provide an automatic gas cutoff of this character in which the automatically operable mechanism will .be located wholly within the casing, and which will be equipped with exteriorly operable gas tight means for resetting the cutoff and for adjusting the said means for producing a sub-normal flow in the cutoff when there is an abnormal in crease in the How ofgas through the inlet.`

A further object my invention is to provide means exterior to the 'gas chamber for resetting the cut-off valve within the chamber so as to permit the free iiow of gas.

A further object of my invention is to provide a simple device having few parts and therefore not liable to get out of order, which will positively cut off the flow under the conditions stated.

My invention is illustrated in the accompanying drawing forming part of this application, in which- Figure 1 is a vertical section through the device, Fig. 2 is a horizontal section along the lline 2--2 of Fig. 1, and Fig. 3 is a plan view of a drop arm and adjustable closure carried thereby.

In carrying out my invention I provide an oblong casing 1 which is preferably made of cast metal, such as brass. At one .cndvofg is a-.partition 4 dividing the interior of the' lcasing into inlet and outlet compartments A and B, these compartments communicating with each other by means of an opening 4X at the bottom of the partition 4; In one corner of the compartment B is a compart- .'ment C constituting an outlet passage and formed bya partition 5 of the shape shown in Fig. 1. The compartment B is adapted to communicate with the compartment C through an opening 5x in the partition 5.

The casing 1 is provided with a cover 6 which may be fastened to the casing by means of bolts 7, suitable packing 8 being provided to make the joint tight. The cover bears two hand wheels 9 and 10. The former has a stem 9K which is threaded t-o engage the threaded lug 11, so that as the hand wheel 9 is turned the stem 9x will move into or out of the compartment A. The hand wheel 10 likewise has its stem 10x threaded into the lug 12 sov that the stern may be moved upwardly or downwardly as the wheel 10 is turned. The lower part of the stem is provided with a head 13. `Within the compartment A is a closure 14 arranged to close one end of the opening or passage 4X, this closure being provided with a resilient gasket 15 arranged to bear on the ends of the walls of the Ipassage 4". The closure is carried at the lower end of a bell crank lever 16 which is pivoted at 17 in the side walls and whose shortlarm 18 is normally pressed upon by a spring 19. The upper end of the spring is engaged by 4a lever 20 pivoted at 21 and provided at its opposite end with a yoke 21f arranged to straddle the stem 9X so that when the hand wheel 9 is turned the leverQO may be moved so as to exert greater or less force on the spring 19. In the compartment B is an arm 2:? constituting a tripping device and having at its lower end a plunger' 23 arranged to enter the opposite end of the passage 4K from the closure 14. .The upper endof the arm 22 is pivoted at 24 and is provided with an integral hool or'bent over portion 24a.

At 25 is pivotedA an L-shaped arm 26 havingv I side walls.

ashoulder 26a at its end, and being provided with a' slot 2T arranged to receive the threaded'redueed portion 28 of a closure 29 similar to the closure 14, a milled nut 30 securing the closure to the arm.

From the foregoing description of the various parts of the device the operation thereof may be readily understood. The gas enters at the inlet 2 and impurities in the gas are screened out by means of the screen 31 which, aswill be seen from the drawing,` is held by flanges 32 projecting from` the If the flowl of the gas is normal then the closure let will be open and the gas will pass from the compartment A into the compartment B pushing back the plunger so as to bring the arin 22 into the full line 'position shown in Fig. l. While in this po sitionja pin 22X carried by the arm 22 engages one end of a setting lever 32, the opposite end of the lever 32 being engaged by the shoulder 26a of the arm 26. The gas passes through the compartment B in the manner indicated by the arrows, through the opening 5x and out through the exit pipe 3. Now if for any reason the tlow otl the gas should decrease below the safety limit, which may be predetermined, the gas will not have force enough to push the' plunger 23 out of the passage 4x, so that the arm 22 will move into the dotted-line positionl shown in Fig. l by gravity. The movement of the arm 22 will withdraw the pin 22x from the end of thelever 32 aud will at the saine time bring the, hooked extension 24 on the upper end of the lever, thereby forcing the opposite end upwardlv-aiul tripping the arm 26, which will tall immediately into the dotted line position, the elosure 29 entering the opening 5^' to prevent. a further flow of gas. It will thus be seen that the gas will be cut. otf automatically by the abnormal reduction ol the flow. Ou the other hand with the apparatus set as shown iii Fig. l, let us assume that the [low increases. beyond a 1n'edeteruiintal safety.

limit. Then the closure 1l will 'be toi-eed into the end ot' the passage, -lx by the increased flow thus cutting oll' the [low ol gas into the chamber l. i\s soon as the llow iu they chamber li lowers, thel arm 22 will swing to the dotted line position, siuee no gas is coming to keep it in the lull line position. 'l`liis will trip the arm 26 in the manner already described. Y thereby etl'eeting the. closure of the opening lt will thus be seen that the increase in the low ot' the gas really causes the operation of the low pressure closure.

'lhe wheel t), isloi the purpose of regulating the point at which the elosure, 14 will aet, siuee by movingr the wheel more or less tension isput on the spring lt), and hence iuore or less gas pressure will be required to force the closure against the end of the passage 4X. The wheel 10X is for the purpose of resetting the device, i. e., opening the closure 29. When the wheel is screwed down the head 13 will move to the dotted line position, thereby raising thc arm 26 so as to allow the shoulder 26 to drop behind the end ofV the lever 32. If the flow of the gas has become normal the movement of the arm 22 will cause the lever 32 to hold the arm 26. Any increase or decrease of flow beyond the predetermined limits will result in the automatic cut-off of the gas as described. It the head 13 is left in the dotted line position shown in Fig. l, then of course the arm 26 will be prevented from falling. In order to insure the closing of the opening 5x l may make the closure 29 adjustable along the arm 26 by the tightening or loosening of the nut 30.

The device is simple, has few parts, and is not liable to get easily out of order. It may be accurately adjusted to work at predetermined pressures.

l. A casing provided with an inlet and an outlet, a partition within said easing pi'ovided with an opening, an arm pivotied ou each side ot said partition, one of said arms being provided with a closure for said opening, the other arm being provided with a plunger arranged to register with said opening, a second partition provided with an opening. means for closing the opening in said second partition, and a pivoted trip member arranged to be engaged by the pivoted arm bearing the plunger for operating the closure for the opening in said second partition.

2. .i easing provided with an inlet and an outlet, a partition within said casing provided with an opening, an arm pivoted on eaeh side of said artition, one of said arms being provided with a closure for said opening, the other arm being provided with a plunger arranged to register with'said opening, a second partition provided with an opening, a weighted arm'pivotally disposed near said .second partition and being pro vided with a closure ar'anged `to enter the opening in said second partition, a pivoted trip member arranged to engage one end of said weighted arm and to be engaged by the pivot'ed arm bearing the plunger.

3. A casing provided with an inlet. and an outlet, a partition within said easing rovided with an opening, an arm pivote on itv arm and to be engaged by the pivoted arm bearing the plunger, and means for adjusting the distance of the first named closure from the first named opening..

4. A casing provided with an inlet and an outlet, a vertical partition Within said casing provided With an opening, an arm pivoted on each side of said partition, one of said arms being provided With a closure'for said opening, the other arm being provided with a plunger arranged to register with said opening, a second partition provided with an opening, a Weighted arm pivotally disposed near said second partition and'being provided with a closure arranged to enter the opening in said partition, a pivoted trip member arranged to engage one end of said Weighted arm and to be engaged by the pivoted arm bearing the plunger, the movement of the latter arm serving to release the Weighted arm through the medium of the lpivoted trip.

5. A casing provided With an inlet and an outlet, a vertical partition Within said casing provided with `an opening, an arm pivoted on each side of said partition, one of said arms' being provided with a closure for said opening, the other arm being provided With a plunger arranged to register with said opening, a second partition provided with an opening, a Weighted arm pivotally disposed near said second partition and being provided with a closure arranged to enter the opening in said partition, a pivoted trip member arranged to engage one end of' said Weighted arm and to be engaged by the pivoted arm bearing the plunger, the movement of the latter arm serving to release the Weighted arm through the medium of the pivoted trip, and means including a spring for adjustingthe distance of the first named closure from the first named opening.

G. A casing provided with an inlet and an outlet, a vertical partition Within said casing provided with an opening', an arm pivoted on each side of said partition, one of said arms being provided with a closure for said opening, the other arm being provided With a plunger arranged to register with said opening, a second partition provided with an opening, a weighted arm pivotally disposed near said second partition and being provided with a closure arranged to enter the opening in said partition, a pivoted trip member arranged to engage one end of said Weighted arm and to be engaged by the pivoted arm bearing the plunger, the movement of the-latter arm serving to release the Weighted arm through the medium of the pivoted trip, means including a spring for adjusting the distance of the first named closure from the first named opening, and means exterior of the casing for resetting said Weighted arm.

7. An automatic gas cutoff including aI casing having an inlet and an outlet, means let. compartments and provided at the inlet' compartment with an inlet and having an outlet at the outlet compartment, means located in the outlet compartment and operable through an abnormal decrease in the 'flow of the gas for closing the said outlet, and separate means operating in the inlet compartment for producing a sub-normal fion' Within the outlet compartment when there is an abnormal increase in the flow of the gas into the inlet compartment.

9. An automatic gas cutofil including a casing having an inlet and an outlet, a closure movable toward and from the outlet, means for holding the closure in its open position, and tripping mechanism operable through an abnormal decrease in the flow of the gas for -releasing the closure to permit' the same to close the outlet, and separate means for producing a sub-normal iovv Within the cutoff to cause an operation in the tripping mechanism when there is an abnormal increase of the fioW of the ,gas through the inlet.

lO. An automatic gas cutoff comprising a casing having an inlet and an outlet, a closure movable toward and from the outlet, setting mechanism for holding the closure in its open position, said mechanism including means operable through an abnormal decrease in the fiow of the gas for releasing the closure to permit 'the same to close the outlet, and separate means for producing a sub-normal flow within the cutoff to cause an operation of the said mechanism when there is an abnormal increase in the flow of lthe gas through the inlet.

11. An automatic gas cuto comprising a casing having an inlet and an outlet, means located Wholly Within the casing and operable through an abnormal decrease in the flow for closing the outlet, said means including a pivoted closure, and mechanism for setting and tripping vthesame, means operable exteriorly of the casing for swinging the closure to its open position to reset the same, and separate means for producing a sub-normal flow in the cuto to cause an operation of the first-mentioned means when there is an abnormal increase in the fiow through the inlet.

l2. An automatic gas cutoii comprising a means for producing a sub-normal ow in means connected with the spring for adjustthe cutol to cause an opleration of tlhe firsti ing the said closure.

mentioned means when t 1ere is nn a morma ,T 4 increase in the How through the inlet, said 1 MARTIB LUTHER GROVL' separate mezns including a pivotod closure, i Titnessesg a spring yieldably maintaining the closure ALBERT FOY,

in an open position, and exteriorly operable i WILLIAM A. WRAY.

Gopes of this patent may be obtained for five cents each, by addressing the Commissioner of Ilaten'cs,

Washington, D. G.

Images