US1379092A - Safety-valve - Google Patents

Description

F. FRCCASCIA AND'J. ERCOLANI.

sA'FETY vALvE.

L kw m. 4, n w n mh a M Y 7 l m. b 06 0o M vw w .vs m wmf u..

UNITED STA FRANK FRACCASCIA. AND JOHN ERCOLANI, QI '.PHILADELPHTA ASSIGNORS 0F ONE-THIRD TO ADAM CWIK, 0F CAMDEN,

TES

PATENT OFFICE.

SAFETY-VALVE.

Application filed J'une 23, 1920. Serial No. 391,131.

To all 'whom it may concern.'

Be it known that we, FRANK FnAooAsciA and JOHN ERCOLANI, citizens of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Safety-Valves; and

we do declare the following to be a f ull, clear, and exact description of the invention,

such as Will enable others skilled in the artto which it appertains to make and use the same. Y

This invention relates to an improved safety valve for use in connection with ahot water boiler and one obj ect of the invention is to provide a valve so constructed that watermayV pass out of the valve when it reaches a pressure which would be dangerous, the valve being so constructed that ordinarily the passage of water through` the valve will be prevented. It will thus be' seen that with the device connected with a boiler or hot water-pipe, water will be noi-,l

mally confined in the boiler` or hot water pipe but as the pressure increases from heat or cold, the water may pass into the body associated with a disk movably mounted in r, through the improved valve,

an oil chamber and permitted to move upwardly rapidly and preventV it from moving downwardly with the same rate of speed.

'Another object of the invention isv to so construct this valve that a spring which engages the disk ofthe piston may be compressed and the tension of they spring thereby controlled.` f

Another object lof the invention is to so construct this valve that `it may be readily taken apart for cleaning and repairing.

This inventiony is illustrated in the accompanying drawings, wherein:

Figure 1 is a vertical sectional view Fig. 2 is a .transverse sectional view taken along the line 2 2 of Fig. 1, and lookingy in the direction of the arrows A-A, and

-F ig. 3 is a similar view looking in the direction of the arrows B-B. y

This-improved safety valve or check valve will be used in connection with a boiler, such for instance as is provided in connection with a kitchen range. The device will be connected 4directly with the boiler or may be connected'with a hotwater pipe at any point desired. It has been customary to depend upon pressure forcing water back through the water inlet of the boiler but iny some cases this cold water inlet will becomeY choked and the boiler will burst under excessive pressure. In vorder to overcome this objection, the improved valve has been provided and will be putin place as stated, a check valve of an ordinary construction being provided for the cold water inlet; pipey of the boiler, thus permitting cold water.' to enterthe boiler but preventing pressure fromv forcing this Water back through the coldI water inlet. It will thus be seen'that the 'improved valve will receive the full effects of the pressure in the boiler and hot water pipe. 1 i

This improved valve is provided with` a housing or body 1 which is provided with a neck extension 2 externally threaded ask shown so that the neck may be screwed into a threaded opening formed in theboiler or hot Water pipe. An outlet arm 3 extends from the housing and is internally threaded so that a pipe may be connected therewithand led to'a sewer orv other suitable point where' the water whichV forces 'its way PatentedMay 24, 1921." I,

through the valvemay--be received.; This i armk 3 is provided with al partition .4 at its4 inner end having an opening 5r formed therein so that the'water whichpasses through the inlet neck 2 into the chamber "6 of the housing may pass through this :opening 5 and out through the outlet-farm 8. In' order to control passage of the water through the opening 5, there has been provided a gate 7 which is pivotally mounted from its upper end and is normally in the closed positionrr shown in 1. This gate will' open outwardly under pressure and when in an open position, the water may pass freely the gate in a closed position, there has been provided a locking pin 8 which is slidably mounted in an opening formed in the block 9 and is provided with `a transversely extending head or side arm 10 which extends into the cylinder 11 which connects the water chamber 6 with the oil chamber 12.

This locking pin 8 extends down into theoutlet 3 and has a beveled lower or free endwhich engages the beveled face of the abutment 13 formed on 4the gate 7. Therefore, when the locking pin is moved downwardly. and its beveled face engagesj the abutment block 13, the gate 7 will be swung to thefclosed position and securely held in this position. later will, therefore, be

prevented from passing through the outlet The shaft extension 16 has its ends engag.-

ing a check valve 17 which is positioned in the upper portion of the inlet 2 and will be normally held in a elosedlposition to preventwater from passing through the inlet 2 into the water chamber 6 of the valve. The upper piston shaft extension 17 extends intoithe oil chamber 12 and is connected with a disk 18 which is slidably mounted in this oil chamber and is provided with a small perforation 19 for the passage of oil when the disk is moving downwardly in this oil chamber and with a larger oil passage 2() for the passage of oil when the disk is moving upwardly in the chamber 12.

In order to prevent the oil from passing` through this passage 20 when the disk is moving downwardly, there has been provided a valve 21 which is of the check valve type and is yieldably retained in a closed position by means of the spring 22 riveted to the disk as shown at 23, and having its free end portion engaging the valve 21'and normally retaining the valve in a raised or closed position. It will thus be seenrthat when the disk is moving upwardly with the piston, the oil may pass freely throughrthis opening `20 and that therefore the disk can be raised rapidly, butthat when the disk is moving downwardly, the valve 21 will close the opening 20 and therefore the oil must pass through the small perforation 19; It will be further noted that the head or arm 10 of the locking pin 8 extends into the cylinder 11 above the piston 14 and that therefore when the piston moves upwardly, it will engage this arm or head and draw the lockingpin upwardly outof an operative position, thereby releasing the gate 7 and permitting it to swing to an open p0- sition.

This valve housing 1 is provided with a cap 24 which is screwed onto theupper lportion of the housing and is provided with a neck extension 25 in which is positioned a spring 26 which eng-ages the disk 18 at its lower end and at its upper end` enga-ges a plate 27 which plate is recessed 'from its upper face to provide a pocket receiving the inner end of the screw 28 passing through a threaded opening` formed in the upper end portion of the neck 25.` Therefore, the tension of the spring 26 can be controlled by turning of the screw 28 to compress` the spring or relieve the spring of excessive pressure.

` Vhe/n this device is in` use, the valve is connected with the boiler or. hot water pipe as previously explained and the adjusting screw will be turned to place the spring under the proper tension according to the. amount of pressure at which 1t 1s desired to have thegate openrandpermit waterto the valve. freezing or from thewater becoming heated beyond a desired amount, thepressure of the water will force the check valve at `the upper end of the inlet to` an open position and the water will enter the water chamber,

of the valve housing. The piston will move upwardly with the'check valve l17 and `will carr the disk v18 with it, the oil moving free y through the opening 2O as thisdisk 18 moves upwardly. llvhenfthe` pressure has increased to such a point that the piston engages the head or arm 10 of the locking pin 8, the locking pin willi be moved up wardly and as soon as it moves out of engagement with vthe gate 7, the pressure'fof the water in the water chamber iofrthis valve will swing thegate to an open `position and thus permit a portion of the :water from the hot water pipe or boiler to pass out through the outlet 3 into fthe overflowl pipe which will lead to the filler.` lWhen the pressure has decreased, the spring will move the disk downwardly, andthepistonfwill be carried downwardly withy this disk outs of engagement with the head or arm 10, and at the same time, the valve 17 willibe forced `outwardly to a closed position.L This diskV will move slowlyas it moves downwardly and therefore the iwater in this water chamber will have ample time to pass out through the outlet' before the gate 7 moves Vto a closed position. It should be further notedV that as the disk moves downwardly, it will engage the head-or arm 10 of this locking or repair any of the parts contained therein,

it is simply necessary to remove the cap 24 and the parts contained in the valve housing and cap can be easily removed, cleaned and .repaired and the valve then reassembled. It

pro-Y Will thus be seen that there has been vided a valve so constructed that a boiler may be prevented from being damaged from excessive pressure.

What is claimed is: 1. A valve kcomprising a housing having an inlet and an outlet and having in its upper portion an oil chamber and in its lower portion a water chamber communicating with the inlet and outlet and in communication with the oil chamber through the medium of a piston chamber, a kcheck valve slidably mounted in the inner end portion of the inlet, a gate valve pivotally mounted in the inner end portion of the outlet, a locking pin slidably carried and extending for engagement with the gate valve to retain the gate valve in a closed position, the locking pin having a side arm extending into the piston Chamber, a piston slidably mounted in the piston chamber and having a shaft extension Aextending for engagement with the check valve and a second shaft extension extending into the oil chamber, a disk carried by the second shaft extension of the piston and adapted to engage the locking pin to move the locking pin to an operative position after being moved to an inoperative position through engagement of the side arm by said piston, a cap for the valve housing closing the upper end of the oil chamber, a spring in the cap extending into the oil chamber and engaging the disk, and a set screw extending through the cap for engaging a 'disk at the upper end of the spring and applying pressure to the spring. 2. valve comprising a housing having an oil chamber and a water chamber and a` piston chamber communicating with the oil and water chambers, the housing being fur-l ther provided with a water inlet communieating with the water chamber and a water outlet communicating with the water chamber, a disk slidably mounted in the oil lchamber and having a valve controlled oil passage and a second relatively small oil pas-V sage, a piston slidably mounted in the pis ton chamber and having connection with the disk of the oil chamber, a check valve in the V inner end portion of the water inlet, `a shaft extension for the kpiston engaging the check valve, a gate valve pivotally mounted in the inner end .portion of the water outlet, and a locking pin slidably mounted for holding the gate valve against opening, the pin having a side extension for engagement by the piston for movement into an inoperative position and engageable by the disk for movement to an operative position.

3. A valve comprising a housing having a water chamber, an oil chamber and a piston chamber communicating with the oil and water chambers, an inwardly opening check valve controlling admission of water to the water chamber, an outwardly opening gate valve controlling passage of Water from the water chamber, a latch for the gate valve, a piston slidably mounted in the piston chamber having engagement with the check valve and adapted to engage the latch to move the same to an inoperative position, a disk mounted in the oil chamber to control movement of the piston, and resilient means engaging the disk to yieldably hold the disk and piston' against sliding movement in one direction.

4. A valve comprising a housing having a water chamber provided with an inlet and an outlet, a check valve for the inlet, a gate valve for the outlet, a latch for releasably holding the gate against movement to an open position, a piston slidably mounted and having engagement with the check valve and adapted to engage the latch to move the same to an inoperative position, a spring for yieldably holding the piston against sliding movement, and means for regulating the' tension of the spring.

5. A valve comprising a housing having a water chamber provided with an inlet and an outlet, a check valve for the inlet and a gate valve for the outlet, a latch for releasably holding the gate valve against movement to an open position, a piston having engagement with the check valve and adapted to engage the latch, a cap for the housing having a pocket formed therein, a spring in the pocket having engagement with the piston, and a set screw extending through the cap into the pocket and engaging the spring :to compress the same.

6. A valve comprising a housing having a water chamber provided with an inlet and 'an outlet, valves for the inlet and outlet,

means releasably holding the valve of the butlet in a closed position, piston means for 'moving the last mentioned means to an inoperative position and returning the valve of the inlet to a closed position, resilient means yieldably holding the piston against sliding movement in one direction, and means for controlling the tension of said resilient means.

In testimony whereof we have hereunto FRANK FRACCASCIA. JOHN ERCOLAN'I.

set our hands.

Images