US1687627A - Device for indicating variation in flow of liquids - Google Patents

Description

Oct. 16, 1928. 1 1,687,627

. w. L. MARDEN.

DEVICE FOR INDICATI NG VARIATI'U'N IN FLO W 0F LIQUIDS Filed April 24. 1926 |hill- I, I i a a; l MI 2 a i h 1 a5 I H. W

' IINVENTOB I WILLIAM L. manuals, on NEW YORK, N. Y.,

P TENroFFICE.

assmnoa'ro nnrrimn METER COMPANY,

OF NEW YORK, N. .Y., 'A CORPORATION OF NEW JERSEY.

'nnv'xcii non mmca'rrne VARIATION IN FLOW on L'IeUIns.

Application filed April 24,

In the operation of high power radio transmitters it is necessary to water-jacket the vacuum tubes and to maintain, during operation, a constant and uniform circulation of water in order that the vacuum tubesmay be kept constantly cool. Any substantial reduction in the circulation of the cooling'water results in destruction of the vacuum tubes; The object of the present intention is to provide reliable means whereby any substantial reduction in the flow of water. under such circumstances, shall be indicated, or shall be made to operate a. signal of some sort,'or,

- preferably, shall be made to interrupt the circuit of the vacuum tubes and so save itfrom destruction. The invention has been developed with particular reference to the protection of vacuum tubes in radio transmission installations, but it will be obvious that it is capable of application in various other arts,

in which the diminution of the flow of a liquid is to be indicated or to effect an operation of some sort. In accordance with the inventron, an operating plunger 1s arranged to be maintained in normal position by the hydrostatic pressure differential between an inlet chamber and an outlet chamber which com municate with each other through an aperture which, being of predetermined area, permits a predetermined flow, a variation in pressure'differential due to a variation in the flow being accompanied by a movement of the plunger which effects an indication of the variation in flow or some other desired result, such as the interruption of the circuit through a vacuum tube.

The invention will be explained more fully hereinafter with reference to the accompanying drawing, the single figure of which is ,a view partly in elevation and partly in ver tical section ofa convenient embodiment of the invention in association with an electrical circuit.

In the embodiment of the invention illustrated, a substantiallycylindrical shell a is provided interiorly with diaphragms a' and a which form an inlet chamber a, an outlet chamber a, and an operating chamber a.' For convenience in manufacture, one-end oi the shell is fitted with a removable plug 6 and the other end of the shell is fitted witha plug .0, which is also removable and, in the present instance, is shown as made of insulating material as-a carrier for circuit terminals to be referred to. The cooling water or the liquid,

192s. Serial No. 104,435.

the flow of which is to be maintained, is delivered to the chamber a through a suitable connection d and is conducted .away from the chamber a through a suitable connection 6,

and the two chambers a and a communicate through an aperture a which, in this instance,

is shown as axizfl and is of predetermined area. As shown, the aperture (19 is provided with a bushing a which may be replaced for the purpose of securing the proper area of the aperture.

VVithin the-shell a is placed a plunger f i which is movable axally and is guided at its lower end upon a pin 6 projecting from the plug b, and at its upper end, with a close working fit, in an aperture in the diaphragm a In' this instance the plunger passes through the aperture a witha free space about it, such space forming the controlling opening between the two chambers a and a through which the liquid must flow in its movement.

.In the construction shown, the of flow, under given conditions of supply, is such that the hydrostatic pressure differential between the inlet chamber a and the outlet chamberafl determined by the measured aperture a, maintains the plunger f in an elevated position, while under a diminution of flow, re-

iiormal rate sulting in a decrease of the pressure difierential between the two chambers, the plunger falls.

The movement of the plunger under a VEI'I'. ation of the pressure differential between the two chambers can be taken advantage of in various ways, either to indicate a diminution of flow'or'to efiect some operation, such as the opening of the circuit of a vacuum tube. In the application of the invention illustrated in the drawing, the upper end of the plunger 7, within the chamber a (into which no appreciable quantity of liquid enters, the closure at; the upper end being air-tight) .coacts with a circuit breaker g, which is weighted and pivoted in the end of a binding post hand has a contact point g adapted for 1 contact with the end of another binding post 2', butheld normally out of contact therewith by the plunger f when the latter is in its elevated position. In the arrangement shown, the two binding posts have connected thereto the terminals of a circuit Z, which includes a source of energy Z and an-electro-magnetic device Z which may carry abridge piece I to close the ga between two terminals 1 of the circuit, or example,- of the vacuum I an inlet cham ously, a connection let chamber,

tube tobe(protected. Solon lunger f is ld in its ele-' normal an the vated position, t e 'CllClllt Z is broken at the point g and the bridge piece Z closes the ap between the terminals 1, but ifthe flow su ers adiminution suificient to permit the'plun'ger f to drop, the circuit 1 Wlll be comp eted at the point 9 and the bridge piece Z )will Open the gap between the terminals Z. It will be understood that theelectro-magnetic device I may itself serve as one 'form of indicator or it may have a function .such as that of opening a. circuit. 7 In any case,the operation which is the primary purpose of the movement of the plunger under a variation in flow 1s eflected by a the movementitself.

It will be understood that various changes in details of construction and arrangement can be made to suit difi'er'ent conditionsof use and ,that, except claims, the invention is not restricted to the articular construction shown and described erein. I

I claim as my invention:

1. A device for indicating variation in flow of moving li uids comprising a shell with r and an outlet chamber, a constantmeasured aperture connecting the two through which the liquid flows continufrom the source of liquid supply to the inlet chamber, a discharge connection from the outlet chamber, and a plunger movable in the shell under the influence of a differential of hydrostatic pressure between'the two chambers.

2. A device for indicating variation in flow of liquids comprising a shell with an inan outlet chamber communicating-with the inlet chamber through a measured aperture and an operatin chamber, a connection from the source of liquid supply to the inlet chamber, a discharge connection of the plunger from the outlet chamber, and a plun er having one end in the iplet chamber and t e other end in the operating chamber and movable under the influence of a differential of hydros'taticpressurebetween thetwo chambers.

3. A device for indicating variation in flow of 'liquids comprising a shell'with an as pointed out in the apertured diaphragm" forming an inlet c amber and an outlet chamber, a connection 1 from the sourceoi. liquid supply to the inlet chamber, a discharge connectionfrom the outlet chaml'ier a and a plunger -movable through'the apertured dia hraunder the influence of adiflerentia'l ohy rostaticpressure between 'the two chambers, v r

*4. A device. for. indicating variation in flow of liquids comprising a shell with two apertured 'diaphragms forming an inlet chamber, an outlet chamber and an operatin chamber, a connection from the source 0 liquid supply to the inlet chamber, a discharge connection fromthe outlet chamber, and a plunger movable through the apertures of the diaphragms'under the infiuence'of a diflerential of hydrostatic pressure between the inlet chamber and the outlet chamber. 4

5. A device for indicating variation in flow of liquids-comprising a shell with'an inlet chamber and an outlet chamber communicating through a constant measured aperture, a connection from the source of liquid sup: ply to the inlet chamber, a discharge connection from the outlet chamber, afplunge'r movable in the shell under the influence of a differential of hydrostatic pressure due to the flow of liquid between the two chambers, and devices operated by the movement of the plunger to indicate a variation in the pressure eating through a measured aperture, acon- X nection from the source. of liquid supply to the inlet chamber, a discharge connection from the outlet chamber, a plun er movable in the shell under the influence o a differential of hydrostatic pressure between the two chambers, insulated circuit terminals carried by the shell, and a contact breaker inoperative relation with-the plunger'antl adapted to make and break the circuit, between said terminals.

This specification signed this 22 day of April, A. n. 1926. WILLIAM-1L. MARDEN.

Images