Title of Invention

"A COAXIAL CERAMIC CONNECTOR"

Abstract

This invention relates to a coaxial ceramic connector comprises of a metallic ring (4) accommodating a ceramic cylinder (3) therein, said ceramic cylinder (3) is disposed with a central core (2) wherein the inner diameter of said ceramic cylinder (3) is equal to the outer diameter of said central core (2) and the inner diameter of the metallic ring (4) is equal to the outer diameter of said ceramic cylinder (3), said central core (2) is provided with rectangular and flat opposite ends.

Full Text

FIELD OF THE INVENTION This invention relates to a coaxial ceramic connector which is primarily proposed to be used in the transducer, has been invented. The coaxial connector of the present invention may be used in the transducer. BACKGROUND OF THE INVENTION It is to be understood that the term transducer used herein is taken in its broadest sense and may include electroacoustic, electromechanical transducers, and piezoelectric filters, frequency control devices and the invention may also be used and adapted to various other applications requiring firm and long lasting connection of the two different components, wherein the components may be connected through the device described herein using a cable, particularly electric cable. As well known in the art the transducer term in broad term is used to convert the electrical energy to mechanical or sound energy and vice versa, as the case may be. Therefore, in the case of electromechanical transducer, which may particularly be made of ceramic material, if the ceramic body is subjected to the applied voltage across the connecting lead, produces a strain or mechanical deformation of the ceramic body, on the other hand, if the ceramic body is subjected to the mechanical stresses, the resulting strain (stress is directly proportional to strain) generates an electrical output appearing as a voltage across the connecting lead. The operational requirement of the transducer calls for the firm and long lasting connection of the main connecting Lead with the inner surface of the hemisphere. The high sensitivity over the wide band of frequencies is always the requirement of the underwater listening devices. Different systems in the form of discs, cylinders etc, do give very high sensitivity, but only over the narrow band of operating frequencies, i.e. one octare below the resonance frequency. The simplest and cost effective device is a piezeoelectric spherical shell. The spherical nature has three main advantages, i.e. omnidirectionality, high hydrostatic depth capability and very low impedence over the wide range of frequency. Since the resonance frequency constant for spherical body is approximately 1.6 times the hoop mode of cylinder, the operating frequancy band is wider than the cylindrical body. The main drawback of known transducers, is that, the connectioning of the elements of known transducers is highly complex problem, which inturn is due to the connections required to be done at many points in the main transducer device and thus the increasing the number of joints to be soldered and hence the complexity. Still another main disadvantage of the connectioning system of the known transducer devices, is that, the connection of the main transducer device to the system is done directly through the teflon coated wire passing through a hole in the main body of transducer. This wire is soldered inside of the shell or cylinder and is held through hole in the main body of the transducer with the help of a special adhesive. Therefore, normally, a hole on the side of the hemisphere gives passage for the teflon wire, which inturn is soldered inside the spherical shell at each hemisphere, and is held with special adhesive as stated herein above. The drawback of such connections is that, the ceramic to teflon bonding is normally very difficult and it deals off during encapsulation process of the main transducer assembly. The further drawback of such known connections of such known transducers is that, such connection arrangement may leads to inaccuracy and fracture of solders of the wire, if direct fixing of the teflon coated wire inside the hole with adhesive is not proper, accurate and perfect. OBJECTS OF THE INVEHTION The main object of the present invention is to propose connector means for connecting the cable drawn from the system with the inside/outside of hemispherical structure of main transducer device or for use in various other devices requiring firm and long lasting connection of the two different components, wherein the componentsm may bo connected through the device disclosed herein this invetion using a cable, particularly electric cable and to eliminate the problems encountered in the usage of teflon coated wire as stated herein above. Another object of the present invention is to propose a coaxial connector, which is easy to handle, capable of giving better bonding and is still cost effection. Still another object of this invention is to propose a coaxial connector, which can form firm connection to any other device with ceramic to ceramic or ceramic to metal or metal to metal or metal to ceramic adhesive. Still another object of this invention is to propose a novel coaxial connector particularly for a transducer or say for hydrophone, more particularly for elect roacoustic transducer, which is sufficiently small so that, final properties of the transducer or the hydrophone are not altered and is also sufficiently large for the case of handling. A still further object of this invention is to propose a coaxial connector for tranducer or hydrophone, which can be fixed onto the cut ends of both the hemispheres of the tranducer or hydrophone with any suitable adhesive, i.e. Ceramic to ceramic or ceramic to metal or metal to metal or metal to ceramic adhesive. Yet another object of this invention is to propose a coaxial connector for tranducer, which can be soldered by small piece of ordinary wire to the inside of the hemispheres, so during moulding, the connector of the presently disclosed invention is not pealed off. BRIEF DESCRIPTION OF THE INVENTION The coaxial connector in accordance to this invention is preferably made-up of ceramic metallic material. In accordance to the preferred embodiments of this invention the ceramic material may include materials like alumina or a binary composition comprising of lead zirconate-lead titanate or lead zirconate-lead stannate or lead stannate-lead titanate or a ternary composition comprising of lead zirconate-lead titanate-lead stannate or like and the metallic material may include any such material electrically conducting, preferably copper. In accordance to another preferred embodiment of this invention the presently disclosed coaxial connector may be made either of ceramic material or of metallic material. In accordance to the present invention a coaxial ceramic connector comprises of a central core, a ceramic cylinder, a metallic ring, embracing said ceramic cylinder. In accordance to the most preferred embodiment of this invention the central core is solid part to transmit the signal from one end to the another end and is preferably a copper wire, characterised by a rectangular structure or a circular structure with rectangular ends which in turn provide the maximum area for contact to the devices to which the proposed connector is being used to connect. The Ceramic cylinder, in accordance to the most preferred embodiment of this invention is characterised by cylindrical hollow structure. The metallic ring, in accordance to one of the preferred embodiments of this invention is characterised by a metallic hollow structure having tappered outer diameter. In accordance to another preferred embodiment of this invention the metallic ring is characterised by a metallic hollow structure having same outer diameter all through the length, that is having no tapper. The ceramic cylinder is fitted on to the central core and fixed with the help of the adhesive, which in turn is conducting adhesive. The metallic ring is pushed on to the ceramic ring. The detailed features of the presently disclosed coaxial connector are explained with the help of the enclosed figures. DESCRIPTION OF THE FIGURES Figure-la shows the top side perspective view of the coaxial connector, in accordance to one of the preferred embodiment of the present invention. Figure-1 b shows the top-side perspective view of the coaxial connector, in accordance to another preferred embodiment of this invention. Figure-2 shows the longitudinally vertical cross-section of the coaxial connector as shown in figure-la. Figure-3a shows the longitudinally vertical cross-section of the coaxial connector, as shown in figure-1b. Figure-3b shows the longitudinally vertical cross section of the coaxial connector, as shown in figure 1b from another end. Figure-4a shows the top end view of the coaxial connector, as shown in figure la. Figure-4b shows the top end view of the coaxial connector as shown in figure-1b. Figure-5a shows the bottom end view of the coaxial connector as shown in figure la. Figure-5b shows the bottom end view of the coaxial connector as shown in figure-1b. DETAILED DESCRIPTION OF THE INVENTION According to this invention there is provided a coaxial ceramic connector comprises of a metallic ring accommodating a ceramic cylinder therein, said ceramic cylinder is disposed with a central core wherein the inner diameter of said ceramic cylinder is equal to the outer diameter of said central core and the inner diameter of the metallic ring is equal to the outer diameter of said ceramic cylinder, said central core is provided with rectangular and flat opposite ends. In accordance to one of the preferred embodiments of this invention, the central core (2) is a solid metallic part, preferably of copper, characterised by a rectangular structure ( figures la and 2) having rectangular arid flat opposite ends(5). In accordance to another preferred embodiment.the central core (2) is a solid metallic part characterised by a cylindrical structure (2) having rectangular arid flat opposite ends (5), as shown in figures la, 3a and 3b . The rectangular and flat and (5) provide the minimum area for connecting to the devices or components of a device, proposed to be connected. The ceramic cylinder(3), in accordance to the most preferred embodiment of this invention is characterised by a cylindrical and hollow structure having two parallel sides(lO) which is fitted an to the central core(2) and fixed with the adhesive(6) which in turn is conducting in nature. The inner diameter of the cylinder (3) is equal to outer diameter or outer parallel sides of the central core(2) and the rectangular and flat opposite ends (b) of central core (2) projecting outside the cylinder (3) , that is the length of the ceramic cylinder (3) is essentially less than the length of the central core (2). The metallic ring(4) in accordance to the one of the preferred embodiments of this invention is characterised by a metallic hollow cylindrical structure having tappered outer aides(ll) as shown in figures-la, and 2, and according to another preferred embodiment the metallic ring structure (4) has parallel, non-tapered sides (11) as shown in figure:--1b and 3a and 3b. The metallic ring(4) has extended part on one end and flat end 9 on another end. The extended end 7 has flat part 8 which sits on the structure preferably hemispherical, of one of the device to which, it is proposed to be connected directly, preferably forming the metallic to i' metallic or metallic to ceramic connection. In accordance to the most preferred embodiment of the present invention the length of the metallic ring (4) is less than the length of the ceramic: cylinder (3), and the inner diameter of the metallic ring(4) is just equal to the outer diameter of the ceramic ring (3) so that the metalling ring (4) tightly fits on to the ceramic ring (3) , The inner diameter of the metallic; ring (4) is essentiallysam all through the length of the metallic ring (4) in accordance to the most preferred embodiment of present invention. The ring structure (4 ), as shown in figures 1a and 2 or parallel non-tappered circumference as shown in figures 1b, and 3a and 3b , essentially has non - tappered or parallel inner circumference. The metallic ring (4) is so fitted onto the ceramic ring (3) that it leaves the ceramic ring (3) structure exposed towards both ends 7 and 9. It is unterstood from the foregoing and enclosed figures that the presently discloaed coaxial connector is novel, and simple and convenient to manufacture and can provide the metallic to ceramic or cermaic to metallic or metallic to metallic: or ceramic lu ceramic joints and provides firm connection between the two different devices or two different parts of the same device and hence can provide the continuity of t rani-mitting the signal between two different parts of same device as in transducers particularly e1ectroacustic transducers. It is further understood from the foregoing descriotion and enclosed figures that the modifications and variation of the proposed device, that is coaxial connector. particularly coaxial connector for transducers, more, particularly coaxial connector far electroacoustic ansducers, are possible in the light of the forgoing description as given herein above, which may fall within they 1 scope of the present invention. I CLAIM: 1. A coaxial ceramic connector comprises of a metallic ring (4) accommodating a ceramic cylinder (3) therein, said ceramic cylinder (3) is disposed with a central core (2) wherein the inner diameter of said ceramic cylinder (3) is equal to the outer diameter of said central core (2) and the inner diameter of the metallic ring (4) is equal to the outer diameter of said ceramic cylinder (3), said central core (2) is provided with rectangular and flat opposite ends. 2. A coaxial ceramic connector as claimed in claim 1, wherein said central core (2) is made of copper. 3. A coaxial ceramic connector as claimed in claim 1, wherein said ceramic cylinder (3) is a hollow cylindrical structure having two parallel sides, 4. A coaxial ceramic connector as claimed in claims 1 to 3, wherein said ceramic cylinder (3) is fitted onto the said central core (2) and fixed with the conducting adhesive. 5. A coaxial ceramic connector as claimed in preceding claims wherein the length of said ceramic cylinder (3) is less than the said length of the said central core (2). 6. A coaxial ceramic connector as claimed in claim 1 wherein said metallic ring (4) has a metallic hollow cylindrical structure having tapered outer sides. 7. A coaxial ceramic connector as claimed in claims 1 to 6 wherein said metallic hollow cylindrical structure is parallel and has non-tapered sides. 8. A coaxial ceramic connector as claimed in claims 1,6 and 7 wherein said metallic ring (4) has extended part (7) on one end and flat end (9) on other end, 9. A coaxial ceramic connector as claimed in claims 1 and 6 to 8 wherein said metallic ring structure has parallel inner sides. 10. A coaxial ceramic connector as claimed in claims 1 and 6 to 9 wherein said extended part on said one end of metallic ring structure is provided with flat part. 11. A coaxial ceramic connector as claimed in preceding claims wherein the length of said metallic ring (4) is less than the length of said ceramic cylinder (3). 12. A coaxial ceramic connector substantially as herein described and illustrated in the accompanying drawings.

Documents:

419-del1997-abstract.pdf

419-del1997-claims.pdf

419-del1997-correspondence-others.pdf

419-del1997-correspondence-po.pdf

419-del1997-description (complete).pdf

419-del1997-drawings.pdf

419-del1997-form-19.pdf

419-del1997-form-2.pdf

419-del1997-form-3.pdf

419-del1997-gpa.pdf