GB2234135A - Improved electrode and method of production thereof - Google Patents

Improved electrode and method of production thereof Download PDF

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Publication number
GB2234135A
GB2234135A GB8916663A GB8916663A GB2234135A GB 2234135 A GB2234135 A GB 2234135A GB 8916663 A GB8916663 A GB 8916663A GB 8916663 A GB8916663 A GB 8916663A GB 2234135 A GB2234135 A GB 2234135A
Authority
GB
United Kingdom
Prior art keywords
electrode
protuberances
sheet
projections
sonar equipment
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB8916663A
Other versions
GB8916663D0 (en
Inventor
Terrence Gaunt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Micromet Ltd
Original Assignee
Micro Metallic Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Micro Metallic Ltd filed Critical Micro Metallic Ltd
Priority to GB8916663A priority Critical patent/GB2234135A/en
Publication of GB8916663D0 publication Critical patent/GB8916663D0/en
Publication of GB2234135A publication Critical patent/GB2234135A/en
Withdrawn legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B06GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06BMETHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/02Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
    • B06B1/06Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
    • B06B1/0644Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using a single piezoelectric element
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D17/00Forming single grooves in sheet metal or tubular or hollow articles
    • B21D17/02Forming single grooves in sheet metal or tubular or hollow articles by pressing

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transducers For Ultrasonic Waves (AREA)

Abstract

An electrode for use in sonar equipment comprising a sheet of material (5) having a plurality of apertures or perforations formed therein, characterised by the feature that a plurality of projections or protuberances (6) are provided in said material. Also according to the invention a method of producing an improved electrode for use in sonar equipment comprises making an electrode from a sheet of material by providing a plurality of holes therein in known manner, and forming a plurality of projections or protuberances over the surface of the electrode by stamping or pressing. <IMAGE>

Description

IMPROVED ELECTRODE AND METHOD OF PRODUCTION THEREOF The present invention relates to an improved electrode and method of production thereof and is particularly applicable to mesh-like electrodes, such as used in sonar transmitting/receiving apparatus, where a plurality of said electrodes are held together in abutting juxtaposition.
Hitherto electrodes for use in sonar equipment sometimes referred to as shim connectors have comprised stacks of sheets of Monel metal gauze which are held together although, more recently, such have been replaced by thin flat and smooth sheets of a suitable metal material, such as a copper alloy, which have been etched to produce a one piece lattice or mesh-like structure. Such grid electrodes are very thin and have a generally smooth surface.
According to the present invention an improved electrode for use in sonar equipment comprises a sheet of material having a plurality of apertures or perforations formed therein, characterised by the feature that a plurality of projections or protuberances are provided in said material.
It has been found that an electrode with said protuberances formed over the surface thereof provides improved electrical contact and a particularly improved performance of sonar equipment for example, the extending from one surface although may be provided extending from both surfaces.
It is believed that the protuberances provide an improved contact between the sheets and this improved efficiency of the equipment in which it is used.
The projections or protuberances in the thin sheet or foil material may be of any suitable shape, size disposition and density The sheet or foil material is thin and preferably of a copper alloy.
Once an electrode for use in sonar equipment comprising a sheet of apertured material, similar to a mesh or gauze, has been produced, such as preferably by an etching process, it is then pressed by a member having a plurality of projections thereon so as to produce the requisite projections or protuberances in the sheet of material from. which the electrode has been produced. The stamping or pressing member is preferably of tool steel etched to leave a plurality of projections preferably of rounded or mushroom like shape.
The sheet is preferably supported on a relatively soft material such as a plastics material backing sheet e.g. polypropylene , which enables the deformation to take place.
Thus, also according to the present invention a method of producing an improved electrode for use in sonar equipment comprises making an electrode from a sheet of material by providing a plurality of holes therein, as is known, and is characterised by forming a plurality of projections or protuberances over the surface of the electrode.
The projections or protuberances will preferably be formed by deforming the material of the electrode, preferably by a stamping or pressing operation using a suitable formed pressing or stamping member having a plurality of small projections extending therefrom.
The invention will be described further, by way of example, with reference to the accompanying drawings, in which: Fig. 1 is a plan view of an electrode formed according to the invention; Fig. 1A is an enlarged fragmentary schematic elevation illustrating the protuberances in the electrode; Fig. 2 is an enlarged fragmentary schematic sectional view of a pressing member for forming a plurality of protuberances in a previously formed flat-sheet electrode.
An electrode for use in sonar equipment is shown in Fig. 1 and comprises a one-piece; thin foil of copper alloy material of generally rectangular outline with a connector portion 2 extending from a rectangular unperforated frame portion 3. The major portion of the electrode has a plurality of small apertures formed in offset rows to produce a lattice like appearance. The electrode is formed by a known etching process. A plurality of protuberances 4 are formed by pressing the material of the electrode with a suitable pressing tool 5 (Fig. 2) of tool steel having a plurality of round ended projections 6 formed over the surface thereof by etching. The protuberances cannot be clearly shown in Fig. 1.

Claims (11)

1. An electrode for use in sonar equipment comprising a sheet of material having a plurality of apertures or perforations formed therein, characterised by the feature that a plurality of projections or protuberances are provided in said material.
2. An electrode as claimed in claim 1, in which said protuberances formed over the surface thereof and such as to provide improved electrical contact.
3. An electrode as claimed in claim 1 or 2, in which the protuberances extend from one or both surfaces.
4. An electrode as claimed in any of claims 1 to 3, in which the sheet is a thin sheet or a thin foil material and the protuberances are of any suitable shape, size disposition and density.
5. An electrode as claimed in claim 1 or 4, in which the material is a copper alloy.
6. A method of producing an improved electrode for use in sonar equipment comprises making an electrode from a sheet of material by providing a plurality of holes therein in known manner, and from a plurality of projections or protuberances over the surface of the electrode.
7. A method as claimed in claim 6, in which projections or protuberances are formed by deforming the material of the electrode.
8. A method as claimed in claim 7, in which the deformation is by a stamping or pressing operation using a suitable formed pressing or stamping member having a plurality of small projections extending therefrom.
9. A method as claimed in claim 7 or 8, in which the sheet is supported on a relatively soft material, for example, polypropylene which enables the deformation to take place.
10. An electrode substantially as herein described with reference to the accompanying drawings.
11. A plurality of electrodes as claimed in any of claims 1 to 4 arranged in a stack in abutting juxtaposition and secured together for use in sonar equipment.
GB8916663A 1989-07-21 1989-07-21 Improved electrode and method of production thereof Withdrawn GB2234135A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8916663A GB2234135A (en) 1989-07-21 1989-07-21 Improved electrode and method of production thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8916663A GB2234135A (en) 1989-07-21 1989-07-21 Improved electrode and method of production thereof

Publications (2)

Publication Number Publication Date
GB8916663D0 GB8916663D0 (en) 1989-09-06
GB2234135A true GB2234135A (en) 1991-01-23

Family

ID=10660376

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8916663A Withdrawn GB2234135A (en) 1989-07-21 1989-07-21 Improved electrode and method of production thereof

Country Status (1)

Country Link
GB (1) GB2234135A (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4046974A (en) * 1976-10-01 1977-09-06 Bell Telephone Laboratories, Incorporated Electroacoustic transducer with springs forming electrical interconnections as a result of assembly
US4160881A (en) * 1977-12-28 1979-07-10 Microtel B.V. Electret transducers: acoustically transparent backplate of sintered conductive spheres and a thin electret coating; meshlike diaphragm spacing screen overlays apertured electret backplate with screen junctions overlaying the apertures
EP0136270A1 (en) * 1983-08-19 1985-04-03 Telefonaktiebolaget L M Ericsson Electret microphone
GB2157916A (en) * 1984-04-10 1985-10-30 Microtel Bv An electric transducer and a method for manufacturing a transducer assembly
GB2162639A (en) * 1984-08-03 1986-02-05 Raytheon Co Polymer hydrophone array with multilayer printed circuit wiring

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4046974A (en) * 1976-10-01 1977-09-06 Bell Telephone Laboratories, Incorporated Electroacoustic transducer with springs forming electrical interconnections as a result of assembly
US4160881A (en) * 1977-12-28 1979-07-10 Microtel B.V. Electret transducers: acoustically transparent backplate of sintered conductive spheres and a thin electret coating; meshlike diaphragm spacing screen overlays apertured electret backplate with screen junctions overlaying the apertures
EP0136270A1 (en) * 1983-08-19 1985-04-03 Telefonaktiebolaget L M Ericsson Electret microphone
GB2157916A (en) * 1984-04-10 1985-10-30 Microtel Bv An electric transducer and a method for manufacturing a transducer assembly
GB2162639A (en) * 1984-08-03 1986-02-05 Raytheon Co Polymer hydrophone array with multilayer printed circuit wiring

Also Published As

Publication number Publication date
GB8916663D0 (en) 1989-09-06

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)