US3555314A

US3555314A - Plural reed reciprocating

Info

Publication number: US3555314A
Application number: US876938A
Authority: US
Inventors: Fernando Villarroel; Carl Joseph Campagnuolo
Original assignee: US Department of Army
Current assignee: US Department of Army
Priority date: 1969-11-14
Filing date: 1969-11-14
Publication date: 1971-01-12
Anticipated expiration: 1988-01-12

Abstract

Fluid is caused to enter a nozzle in which a ring conduit is concentrically located to form an annular orifice. The fluid discharging from the annular orifice impinges directly on the edge of a resonating cavity producing a multiple frequency edgetone. The column of air in the resonating cavity is thereby caused to vibrate at a frequency determined by the depth of the cavity. The changes in pressure within the resonating cavity cause two diaphragms, diametrically opposite and longitudinally placed therein, to pulsate. To each diaphragm is connected a rod for transmitting the pulsations to metallic reeds, which are in turn free to oscillate within a pair of magnetic pole pieces. The oscillations of the reeds induce an electromotive force in a coil surrounding each reed. The resultant electrical currents produced by each coil are combined in series and phase to provide maximum energy for the operation of an external electrical circuit.

Description

United States Patent [72] Inventors Fernando Villarroel Bowie; Carl Joseph Campagnuolo, Potomac, Md. [21] Appl. No. 876.938 [22] Filed Nov. 14, 1969 [45] Patented Jan.l2, 1971 [73] Assignee to the United States of America as represented by the Secretary of the Army [54] PLURAL REED RECIPROCATING GENERATOR 4 Claims, 1 Drawing Fig.

[52] [1.8. CI 310/15, 310/25: 333/71 331/156: 290/1 [51] Int. Cl [102k 35/06 [50] Field ofSearch 3l0/15,22, 25;179/115.5DVC.115.5PS,114R,115R,119R; 333/71; 331/116, 156; 290/1 [56] References Cited UNlTED STATES PATENTS 2,111,036 3/1938 Wippel 3l0/25X 2,215,895 9/1940 Wippel 310/25X 2,895,063 7/1959 Morris 3,015,953 1/1962 Peltola Primary Examiner-D. F. Duggan Att0rneysl-larry M. Saragovitz, Edward J. Kelly, Herbert Berl and J. D. Edgerton ABSTRACT: Fluid is caused to enter a nozzle in which a ring conduit is concentrically located to form an annular orifice. The fluid discharging from the annular orifice impinges directly on the edge of a resonating cavity producing a multiple frequency edgetone. The column of air in the resonating cavity is thereby caused to vibrate at a frequency determined by the depth of the cavity. The changes in pressure within the resonating cavity cause two diaphragms, diametrically opposite and longitudinally placed therein, to pulsate. To each diaphragm is connected a rod for transmitting the pulsations to metallic reeds, which are in turn free to oscillate within a pair of magnetic pole pieces. The oscillations of the reeds induce an electromotive force in a coil surrounding each reed. The resultant electrical currents produced by each coil are combined in series and phase to provide maximum energy for the operation of an external electrical circuit.

PLURAL REED RECIPROCATINGGENERATOR RIGHTS or GOVERNMENT The invention described herein may be manufactured, used, and licensed by or for the United States Government for governmental purposes without the payment to us of any royalty thereon.

BACKGROUND OF THE INVENTION I the fluidic generator disclosed in US. application No. 745,949

filed June 17, 1968 by Campagnuolo et al. and possesses all the advantages of that device as well as other and additional advantages apparent from the disclosure hereinafter.

In certain uses involving the aforementioned fluidic generator, there is need for an increased electrical power output. The obvious way of achieving this is to increase the size of the generator itself, thus providing a larger pneumatic energy input to produce the needed increase in electrical energy output. This solution provides fiuidic generators that are oversized and unwieldy for those applications that required compact, small-sized generators. In addition, there are situations in which the available source of pneumatic energy is limited, thus making it useless to use a larger generator since the limited source could not drive the generator to its larger output.

Accordingly, a primary object of the present invention is to provide an improved fluidic generator for, use as a pneumaticto-electrical energy converter that operates with a much higher efficiency than previous existing models, thus yielding a larger electrical energy output while maintaining compactness in size and reliability in operation.

SUMMARY OF THE INVENTION The aforementioned and other objects may be obtained by using a fluid oscillator in which two diaphragms are diametrically placed in the oscillator resonating cavity and by directing the fluid which is the source of power of the oscillator directly toward the cylindrical opening of the resonating cavity from an annular orifice. The fluid discharging from the annular orifice impinges on the edge of the opening of the resonating cavity producing a multiple frequency edgetone or ringtone thereby causing the column of gas in the resonating cavity to vibrate at a predetermined frequency. The changes in pressure within the resonating cavity cause the two diaphragms to pulsate. To each of the two diaphragms is connected a reed which is free to oscillate within a magnetic field. The oscillations of the reeds in response to the pulsating diaphragms induce electrical currents in the coils that surround each reed. The coils are connected in series and in phase such that the separate currents produced are added for subsequent external use.

BRIEF DESCRIPTION OF THE DRAWING The specific nature of the invention as well as other objects, aspects, uses, and advantages thereof will clearly appear from the following description an from the accompanying drawing, in which:

The drawing is a sectional view of a preferred embodiment of the dual fiuidic generator of the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENT In the drawing the fluid power for the generator enters a port 10 formed by a cylinder 12. At the end of cylinder 12 are circumferentially located a number of apertures 14 through which the fluid enters an annular orifice 16 formed by a ring conduit 17 The annular column of fluid formed by annular orifice 16 1S directed to the opening 20 in a resonating cavity 22 by means of a conduit 19 which has openings 18 through which excess fluid is exhausted to the atmosphere. Annular orifice 16 is of a slightly smaller diameter than opening 20, but thecolumns of fluid emanating from orifice 16 will tend to spread and impinge upon the edge of opening 20. The impinging of the fluid on this edge, in the well known manner, will produce a multiple frequency edgetone or ringtone. The oscillation of the annular column of fluid back and forth across the end of opening 20 will cause the column of fluid in the resonating cavity 22 to vibrate at a frequency determined by the depth of cavity 22. Note that the remaining structure and operation of the dual generator is symmetrical with respect to line A-A'. The vibration of the fluid in cavity 22 will in turn cause the diaphragms 24 to pulsate. The pulsations of diaphragms 24 are transmitted by means of the rods 26 to the armatures 28 which are then caused to oscillate between the magnetic pole pieces of

opposite polarity

30 and 32. The oscillations of armatures 28 between

magnetic pole pieces

30 and 32 will induce electromotive forces in coils 34; these E.M.F.'s are then coupled through wires 36 and 38 to an external circuit (not shown) that combines in series and phase the currents produced by coils 34.

The resultant electrical energy can be used as a power supply for munition fuzes and related devices requiring a compact environmental power source with a high power output. The dual electrical power converter comprised of diaphragms 24, rods 26, armatures 28,

magnetic pole pieces

30 and 32, and coils 34 coupled to the single resonating cavity 22 results in an appreciable increase in power efficiency over the single diaphragm coil system of previous models.

We wish it to be understood that we do not desire to be limited to the exact details of construction shown and described, for obvious modifications will occur to a person skilled in the art.

We claim:

1. Apparatus for utilizing fluid flow to generate electrical energy, comprising:

a. an enclosed volume having an open end and a closed end and defining a resonant cavity,

b. an annular orifice directing an annular column of fluid directly into and so as to impinge upon an edge of said open end of said enclosed volume so as to produce a multiple frequency edgetone thereby causing the fluid in said enclosed volume to vibrate at predetermined frequency,

c. mechanical means comprising first and second diaphragms suspended longitudinally and diametrically opposite within said enclosed volume for sensing the said fluid vibrations therein and for pulsating in response thereto,

d. generating means comprising first and second magnetic field producing means, first and second metallic reeds, means connecting said first and second metallic reeds to said first and second diaphragms, respectively, and first and second coils located in close proximity around said first and second reeds respectively; whereby said metallic reeds oscillate within said magnetic fields in response to said pulsations of said diaphragms for inducing electrical currents in said coils, and

e. electrical circuit means to combine the said currents produced by said first and second coils and to provide an external connection therefor.

2. The invention according to claim 1 wherein said frequency of vibration of said fluid within said enclosed volume is determined by the depth of said resonant cavity.

3. The invention according to claim 1 wherein said open end of said resonant cavity is formed by a cylinder.

4. The invention according to claim 1 wherein said annular column of fluid is formed by a ring conduit in communication with an external source of fluid.

Claims

1. Apparatus for utilizing fluid flow to generate electrical energy, comprising: a. an enclosed volume having an open end and a closed end and defining a resonant cavity, b. an annular orifice directing an annular column of fluid directly into and so as to impinge upon an edge of said open end of said enclosed volume so as to produce a multiple frequency edgetone thereby causing the fluid in said enclosed volume to vibrate at predetermined frequency, c. mechanical means comprising first and second diaphragms suspended longitudinally and diametrically opposite within said enclosed volume for sensing the said fluid vibratioNs therein and for pulsating in response thereto, d. generating means comprising first and second magnetic field producing means, first and second metallic reeds, means connecting said first and second metallic reeds to said first and second diaphragms, respectively, and first and second coils located in close proximity around said first and second reeds respectively; whereby said metallic reeds oscillate within said magnetic fields in response to said pulsations of said diaphragms for inducing electrical currents in said coils, and e. electrical circuit means to combine the said currents produced by said first and second coils and to provide an external connection therefor.