US1126297A - Fluid-pressure-operated alarm device. - Google Patents

Description

H. E. W. SA'UVEUR. FLUID PRESSURE OPERATED ALARM DEVICE. APPLICATION FILED JAN. 2, 1913.

1,126,297. Patented Jan. 26, 1915.

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THE NORRIS PETERS CO-, PHOTO'LITIHOU WASHINGTON, D. C.

HARRY E. W. SAUVEUR, 0F BOXHAGEN-BERLIN, GERMANY.

FLUID-PRESSURE-OPERATED ALARM DEVICE.

Specification of Letters Patent.

Patented J an. 26, M915.

Application filed January 2, 1913. Serial No. 739,872.

To aZZ whom it may concern:

Be it known that I, HARRY E. W. Snnvnmz, a subject of the Emperor of Germany, residing at 11/14 Neue Bahnhofstrasse, BoxhagenBerlin, Germany, have invented certain new and useful Improvements in Fluid- Pressure-Operated Alarm Devices, of which the following is a specification.

This invention relates to improvements in fluid-pressure-operated alarm devices and has for its object to utilize substantially all the energy expended during the expansion of the fluid in the actuation of the alarm mechanism whereby the highest degree of 'eihciency in the operation of the device is obtained, a result which has hitherto not been accomplished.

To the above end the invention consists in the combination of features hereinafter described and recited in the appended claims.

The accompanying drawing illustrates a preferred embodiment of my invention.

In said drawing a designates a nozzle for admitting air or other suitable fluid under pressure into the chamber 6 the volume of which may be varied by means of a pipe 0 which at one end is closed and at the other end is screwed or otherwise detachably connected with the chamber. The volume of the chamber Z) can be varied slightly by rotating the pipe 0 in either direction. But, as will be obvious, the change of volume can take place within greater limits by replacing the pipe by another pipe of larger or smaller dimensions. It will be understood that with the pressure of the fluid at the inlet of the nozzle, constant, the force and also the number of movements in a given length of time of the alarm striking member, hereinafter referred to, can be regulated.

The valve m is pressed against its seat by means of a spring 6 until the gradually increasing pressure in the chamber Z2, acting on the bottom surface of the valve is sufficient to open the valve to admit the fluid therein to escape into the chamber 7. The valve is formed at its lower part with a substantially annular conical recess d' located directly opposite the opening to the chamber f which recess, when the valve is opened, enables the fiuid rushing into the chamber to exert pressure against the walls of the recess, so as to utilize the energy of the fluid to the best possible effect. The valve is formed with perforations g, and a plurality of passages z' are formed in the valve casing to admit the fluid into the annular space it formed also in the valve casing, the arrangement being such that by virtue of the fluid pressure acting against the bottom surface of the valve m, and also against the walls of the conical recess (Z, the valve is lifted to such an extent that the perforations g register with the annular space 7t enabling the I fluid to pass into the interior n of the valve, thence to the alarm striking mechanism. The striking member 70 is constituted as a spherical body and is adapted to move within a cylinder Z which in the embodiment illustrated forms an integral part of the valve casing. The cylinder is open at one end to allow the ball Zc when acted upon by the fluid pressure to strike against the surface of the sound-emitting member 0. The cylinder Z is formed with one or more perforations to allow the escape of the fluid to the atmosphere when the ball is substantially in the position shown by dotted lines in the drawing. The cylinder Z is arranged in a slightly inclined position to facilitate and insure the return movement of the spherical member.

The total sum of the cross-sectional area of the perforations 9 relative to the crosssectional area of the opening of the nozzle a is such as to allow the air in the chambers b and 7 suddenly to enter the space s at the upper part of the valve casing and to act against the spherical member is without perceptible re-filling of the said chambers.

The operation of the device is as follows: Air or other fluid under pressure is admitted into the chamber Z), which by acting upon the bottom face of the valve lifts the lat e from its seat. Immediately upon the opening of the valve, the fluid enters the chamber 7 which in so doing acts upon the walls of the annular recess (Z to lift the valve farther so that the perforations in the valve are in register with the annular space it. In this position the fluid is free to pass from the chamber f along the passages 2', into the annular space 5, through the perforation 9 into the interior of the valve, spherical member 7a to force same along the cylinder Z against the surface of the sound emitting member 0. Owing to the recoil caused by the striking of the spherical member against the sound-emitting member, the former member is forced backward to the lower position of the cylinder where it rethence to the mains until re-acted upon by the fluid. It will be understood that for a moment equal pressure is exerted on the upper and lower faces of the valve. Consequently the force of the spring 6 effects the closing of the valve at the moment the pressure is exerted upon the spherical member. The total pressure of the air admitted through the perforation 9 into the interior of the valve is exerted on the spherical member. The distance which the latter has to travel in the cylinder Z before the fluid can escape into the atmosphere by way of the perforations m is so calculated that at the moment of escape of the fluid the pressure acting against the ball is so small that it may be disregarded.

From the foregoing it will be understood that the fluid is not allowed to escape into the atmosphere until the pressure thereof is reduced to the minimum, as a result of which substantially the total energy of the fluid by virtue of its expansion is utilized in the operation of the alarm mechanism.

The striking force of the spherical member and also the number of strokes thereof in a determined unit of time may be varied as required by varying the cross-sectional area of the nozzle opening, the pressure of the fluid or the force of the spring Z.

The spherical member is may be replaced by a small piston or the like, and the valve by a slide valve; and other constructional alterations which will suggest themselves may be made without affecting in any way the scope of the invention.

What I claim is:

1. An alarm device of the kind described comprising a chamber, means for continuously conducting compressed air into said chamber, means for continuously intermittently ejecting compressed air from said Copies of this patent may be obtained for five cents each, by addressing the chamber, a striking member operated by said compressed air, a sounding member operated by said striking member, the striking member being so arranged that the air is almost completely expanded, and a cylinder within which said striking member moves and which is formed with apertures uncovered by the striking member toward the end of its stroke.

2. A device of the kind described comprising a spring-pressed valve adapted to be operated intermittently by air pressure; a nearly horizontal cylindrical chamber; an outlet from the higher end of said chamber; a spherical body movable within and fitting said chamber, said outlet being uncovered when the ball moved to its extreme position; a sound-producing device, and a conduit for conducting fluid admitted upon the opening of said valve to act against the spherical body, to cause said spherical body to strike said soundproducing device.

3. An alarm device comprising a chamber; said chamber; a casing formed with a plurality of passages; a hollow reciprocating valve subjected to the action of said fluid and formed with a plurality of perforations adapted to register with saidpassages to admit the fluid from said chamber to the casing and thence to interior of said valve; sounding mechanism, and a conduit to allow the fluid in the interior of said valve to expand and to actuate said sounding mecha nism.

in testimony whereof I aflix my signature in presence of two witnesses.

HARRY E. W. SAUVEUR.

Witnesses Anxonn HILYER, MAX BUSIK.

Commissioner of Patents.

Washington, D. G.

a nozzle to deliver pressure fluid into

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