US1721152A - Electrical condenser - Google Patents

Electrical condenser Download PDF

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US1721152A
US1721152A US427671A US42767120A US1721152A US 1721152 A US1721152 A US 1721152A US 427671 A US427671 A US 427671A US 42767120 A US42767120 A US 42767120A US 1721152 A US1721152 A US 1721152A
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strips
condenser
tube
dielectric
metal
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US427671A
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William A Graham
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RCA Corp
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RCA Corp
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G4/00—Fixed capacitors; Processes of their manufacture
    • H01G4/30—Stacked capacitors

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  • This invention relates to electrical condensers and more particularly to a condenser of fixed capacity.
  • the Object of the invention is to secure a neat compact element and to provide convenient supporting means for the plates and terminal arrangements for the unit.
  • Fig. 1 is an enlarged longitudinalsection of the condenser.
  • Fig. 2 is a perspective view of a detail.
  • Fig. 3 is a transverse section on the line AA of Fig. 1.
  • Fig. 4 is a view partially in section showing a method of connecting the condenser in circuit.
  • the condenser plates preferably consist of a number of strips of thin copper or other suitable metal such as tin foil.
  • A. flexible metal sheath 1 which is preferably channel shaped is utilized in assembling the unit. Thin sheet mica strips 2 are fitted at the sides of the channel and a strip of dielectric consisting also of thin sheet mica 3 is fitted in the bottom.
  • the plates consists of alternate metal strips 4, 5 fitted in the channel with mica strips 6 for a dielectric between each of the strips.
  • the mica strips 6 are approximately the same length as the sheath.
  • the metal strip 3 have projections 7 extending beyond the mica strips at the left and the projections 8 of the strips project from the right. When sufficient strips have been as Snapd pressure is applied to force them together and the sides of the channel 1 are bent over the top of the unit to hold the elements rigidly together.
  • the unit is then placed in a drying oven and heated for a suitable time at a suitable temperature to remove all the moisture and'is then dipped in boiling condenser Wax and allowed to cool.
  • the terminals of the corresponding plates are connected together in any suitable manner preferably by pressing them tightly together and soldering or tinning.
  • the unit is inserted in a glass tube 9.
  • a low melting metal 12 such as .Voods metal which is preferably formed of four parts bismuth, two parts lead, one part tin, one part cadmium and melts at approximately Centigrade and has the property of. expanding upon cooling and solidifying and then fitting the glass tube in the cap and'dipping the
  • Fig. 4 I have shown a pair of spring metal clips 13, 14c fastened to an insulating base for conveniently supporting and making electrical connection to the end caps which constitute the terminals.
  • the clips are provided with circular openings 15 adapted to receive the pointed ends of the caps.
  • Condensers constructed as described may be made in various sizes, but the construction is particularly well adapted for small fixed condensers used inradio receiving apparatus. 95 I -laving described my invention, what I claim is 1. As an article of manufacture, an electric reactance having conducting members projecting alternately from opposite ends 100 thereof, and having the ends of said conducting members embedded in a mass of fusible metal and said masses of metal forming the sole support for said reactance.
  • anelec- 5 tric reactance having conducting members projecting alternately from each end thereof, said reactance being enclosed within a tube of insulating material, and the ends of said tube and said conducting material being em- 1 nally and spaced apart by layers of dielectric bedded in a mass of metal in a manner to support and maintainsaid reactance out of con tact with said tube.
  • an electric reactance having conducting members extending alternately from each. end thereof, said reactance being enclosed Within a tube of insulating material andthe-ends of said tube and of said conducting material being embedded in a mass of metal in a manner to form an airtight closure for said tube and to maintain and support said react'ance out of contact therewith.
  • an electric condenser comprising a plurality of interleavedmetallic strips extending longitudinally and spaced apart by layers of dielectric material, the alternate metallic strips having ends projecting on opposite sides beyond the dielectric and said strips being closely embraced by a sheath of clamping material to form a condenser unit and said condenser unit having the projecting ends embedded in a massof metal in a manner to support the same solely by said strips.
  • An electric condenser comprising a plurality of interleaved metallic strips extending longitudinally and spaced apart by layers of dielectric material, the alternate metallic strips having ends projecting on opposite sidesbeyond the dielectric, and having said ends embedded in a conducting cap containing a mass of metal.
  • An electric condenser comprising a con denser unit made up of a plurality of interleaved metallic strips extending longitudiand said material forming the'sole supportfor said interleaved metallic strips.
  • An electric condenser comprising an insulating tube, a plurality of interleaved metallic strips therein extending longitudinally and spacedapart by layers of dielectric material,. the alternate metallic strips having ends projecting on opposite sides beyond the dielectric, and a fusible metalplug in each end of said tube securing and contacting with said ends.
  • an electrlc condenser comprising an enclosing tube
  • a condenser whose greatest transverse. dimension is small compared with the length thereof having a pair of pointed terminal members disposed at opposite ends thereof, a base, a pair of spring clips extending from said base, prongs pro jecting from the clips and imbedded in the base, said clips being arranged in a manner to support and make contact with said condenser when inserted therebetween.
  • a condenser Whose greatest transverse dimension is relatively small as compared with. its length and having a pair ofcpointed terminals at the ends thereof. a base, and resilient conducting means provided with projecting prongs imbedded in the base, said means adapted to support and make electrical contact with said condenser.
  • a condenser whose greatest transverse dimension is relatively metallic strips having ends projecting on opposite sides beyond the dielectric and the adjacent ends being pressed together to form contact members at the opposite ends of the tube, and a pair of terminals at opposite ends of the tube electrically and mechanically connected to the contact members and forming the sole support for said interleaved strips and dielectric material.
  • An electrical condenser comprising an enclosing tube of insulating material, a plurality of interleaved relativel narrow metallic strips therein extending longitudinally and spaced apart by layers of dielectric material, the alternate metallic strips having ends projecting on oppposite sides beyond the dielectric and the fidJfiCGIlt members being pressed together to form contact members at the opposite ends of the tube, a pair of sub stant-ially air tight metallic closures fitted to the ends of the insulating tube and electrically and mechanically connected to the contacts and forming the sole support for said interleaved strips and dielectric material.
  • An electric condenser comprising an enclosing tube, a plurality of interleaved relatively narrow metallic strips therein extending longitudinally and spaced apart by layers of dielectric material, the alternate metallic strips having ends projecting beyond the dielectric towards the opposite ends of the tube, a pair of conducting caps fitted on the ends of the tube and a filling of metallic conducting material in said caps surrounding the projecting ends of the strips and forming the sole mechanical support for said strips.
  • An electrical condenser comprising'an air tight tube of insulating material, a plurality of interleaved relatively narrow metallic strips therein extending longitudinally and spaced apart by layers of dielectric material, the alternate metallic strips having ends projecting'beyond the dielectric toward the opposite ends of the tube, means for clamping the metallic strips and dielectric together, a pair of metallic caps fitted over the ends of the tube and an air tight filling of metallic conducting material in said caps and the ends of the tube surrounding the projecting ends of the strips and formingthe sole mechanical support for said strips.
  • An electrical condenser comprising an enclosing tube of insulating material, a plurality of relatively narrow interleaved metallic strips therein extending longitudinally and spaced apart by layers of dielectric material, the alternate metallic strips having ends projecting on opposite sides beyond the dielectric and the adjacent members being pressed togetherto form contact members at the opposite ends of the tube, a metallic clamping sheath around the strips and dielectric, a pair of air tight metallic closures for the ends of the caslng electrically conductin tric reactance, provided with alternately extending conducting members, an insulated container for said reactance and means expanded against the wall of said container for supporting said reactance at spaced intervals in said container.
  • an electric reactance As an article of manufacture, an electric reactance, a glass tube and a pair, of expanded metal plugs of low fusing material supporting said reactance at spaced intervals in saidcontainer, and forming an air tight seal with said glass tube for protecting said reactance 20.
  • An electric condenser comprising an enclosing container, a plurality of interleaved metalic strips extending longitudinally and spaced apart by layers of dielectric material,

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Fixed Capacitors And Capacitor Manufacturing Machines (AREA)

Description

July 16, 1929. W, A. GRAHAM 1,721,152
ELECTRICAL CONDENSER Filed Dec. 2, 1920 avweulioz W/LZJAMA aim/Y @513 elf/tuna A I Patented July 16, 1929.
UNITED STATES PATENT OFFICE.
WILLIAM A. GRAHAM, OE BROOKLYN, NEW YORK, AssIeNoR T RADIO CORPORATION OF AMERICA, A COR ORATIOR OF DELAWARE.
ELECTRICAL CONDENSER.
Application filed December 2, 1920. Serial No. 427,671.
This invention relates to electrical condensers and more particularly to a condenser of fixed capacity.
The Object of the invention is to secure a neat compact element and to provide convenient supporting means for the plates and terminal arrangements for the unit.
In preparing my condenser unit I utilize a number of thin metallic strips separated by a dielectric, and have thealternate strips of metal extend from opposite ends of the dielectric. The projecting ends are connected after clamping the strips and the element is inserted in an insulating tube to which air tight caps are applied which serve also as the condenser terminals.
The novel features which I believe to be characteristic of my invention are set forth with particularity in the appended claims.
The invention itself, however, both as to its organization and advantages thereof, will best be understood by reference to the following description taken in connection with the accompanying drawing in which Fig. 1 is an enlarged longitudinalsection of the condenser.
Fig. 2 is a perspective view of a detail.
Fig. 3 is a transverse section on the line AA of Fig. 1.
Fig. 4: is a view partially in section showing a method of connecting the condenser in circuit.
The condenser plates preferably consist of a number of strips of thin copper or other suitable metal such as tin foil. A. flexible metal sheath 1 which is preferably channel shaped is utilized in assembling the unit. Thin sheet mica strips 2 are fitted at the sides of the channel and a strip of dielectric consisting also of thin sheet mica 3 is fitted in the bottom. The plates consists of alternate metal strips 4, 5 fitted in the channel with mica strips 6 for a dielectric between each of the strips. The mica strips 6 are approximately the same length as the sheath. The metal strip 3 have projections 7 extending beyond the mica strips at the left and the projections 8 of the strips project from the right. When sufficient strips have been as sembled pressure is applied to force them together and the sides of the channel 1 are bent over the top of the unit to hold the elements rigidly together.
The unit is then placed in a drying oven and heated for a suitable time at a suitable temperature to remove all the moisture and'is then dipped in boiling condenser Wax and allowed to cool.
The terminals of the corresponding plates are connected together in any suitable manner preferably by pressing them tightly together and soldering or tinning.
To prevent access of moisture as Well as to protect the unit and provide a convenient container, the unit is inserted in a glass tube 9. Metal caps 10, 11 of brass, for example, serve as closures for the glass tube and as terminals. Connection between the caps and the plates is conveniently made by first filling one of the capswith a low melting metal 12 such as .Voods metal which is preferably formed of four parts bismuth, two parts lead, one part tin, one part cadmium and melts at approximately Centigrade and has the property of. expanding upon cooling and solidifying and then fitting the glass tube in the cap and'dipping the tinned end inthe molten metal and allowing to cool. When the metal has hardenedthe other cap will be fitted to the other end of the glass tube in a similar manner. Bythis means a firm support, convenient terminals and anair tight closure are provided for the element. In Fig. 4 I have shown a pair of spring metal clips 13, 14c fastened to an insulating base for conveniently supporting and making electrical connection to the end caps which constitute the terminals. The clips are provided with circular openings 15 adapted to receive the pointed ends of the caps.
Condensers constructed as described may be made in various sizes, but the construction is particularly well adapted for small fixed condensers used inradio receiving apparatus. 95 I -laving described my invention, what I claim is 1. As an article of manufacture, an electric reactance having conducting members projecting alternately from opposite ends 100 thereof, and having the ends of said conducting members embedded in a mass of fusible metal and said masses of metal forming the sole support for said reactance.
2. As an article of manufacture, anelec- 5 tric reactance having conducting members projecting alternately from each end thereof, said reactance being enclosed within a tube of insulating material, and the ends of said tube and said conducting material being em- 1 nally and spaced apart by layers of dielectric bedded in a mass of metal in a manner to support and maintainsaid reactance out of con tact with said tube.
3. As an article of manufacture, an electric reactance having conducting members extending alternately from each. end thereof, said reactance being enclosed Within a tube of insulating material andthe-ends of said tube and of said conducting material being embedded in a mass of metal in a manner to form an airtight closure for said tube and to maintain and support said react'ance out of contact therewith.
4. As an article of manufacture, an electric condenser comprising a plurality of interleavedmetallic strips extending longitudinally and spaced apart by layers of dielectric material, the alternate metallic strips having ends projecting on opposite sides beyond the dielectric and said strips being closely embraced by a sheath of clamping material to form a condenser unit and said condenser unit having the projecting ends embedded in a massof metal in a manner to support the same solely by said strips.
5. An electric condenser comprising a plurality of interleaved metallic strips extending longitudinally and spaced apart by layers of dielectric material, the alternate metallic strips having ends projecting on opposite sidesbeyond the dielectric, and having said ends embedded in a conducting cap containing a mass of metal.
6. An electric condenser comprising a con denser unit made up of a plurality of interleaved metallic strips extending longitudiand said material forming the'sole supportfor said interleaved metallic strips.
8. An electric condensercomprising an insulating tube, a plurality of interleaved metallic strips therein extending longitudinally and spacedapart by layers of dielectric material,. the alternate metallic strips having ends projecting on opposite sides beyond the dielectric, and a fusible metalplug in each end of said tube securing and contacting with said ends.
9. As an article of manufacture, an electrlc condenser comprising an enclosing tube,
a plurality of interleaved metallic strips ofrelatively great length as compared to width, disposed therein extending longitudinally and spaced apart by layers of dielectric material and provided with substantially conical conducting members at each end for supporting said condenser and simultaneously making electrical contact therewith.
10. In combination, a condenser whose greatest transverse. dimension is small compared with the length thereof having a pair of pointed terminal members disposed at opposite ends thereof, a base, a pair of spring clips extending from said base, prongs pro jecting from the clips and imbedded in the base, said clips being arranged in a manner to support and make contact with said condenser when inserted therebetween.
ll In combination, a condenser Whose greatest transverse dimension is relatively small as compared with. its length and having a pair ofcpointed terminals at the ends thereof. a base, and resilient conducting means provided with projecting prongs imbedded in the base, said means adapted to support and make electrical contact with said condenser.
12.1n combination, a condenser whose greatest transverse dimension is relatively metallic strips having ends projecting on opposite sides beyond the dielectric and the adjacent ends being pressed together to form contact members at the opposite ends of the tube, and a pair of terminals at opposite ends of the tube electrically and mechanically connected to the contact members and forming the sole support for said interleaved strips and dielectric material.
14. An electrical condenser comprising an enclosing tube of insulating material, a plurality of interleaved relativel narrow metallic strips therein extending longitudinally and spaced apart by layers of dielectric material, the alternate metallic strips having ends projecting on oppposite sides beyond the dielectric and the fidJfiCGIlt members being pressed together to form contact members at the opposite ends of the tube, a pair of sub stant-ially air tight metallic closures fitted to the ends of the insulating tube and electrically and mechanically connected to the contacts and forming the sole support for said interleaved strips and dielectric material.
15. An electric condenser comprising an enclosing tube, a plurality of interleaved relatively narrow metallic strips therein extending longitudinally and spaced apart by layers of dielectric material, the alternate metallic strips having ends projecting beyond the dielectric towards the opposite ends of the tube, a pair of conducting caps fitted on the ends of the tube and a filling of metallic conducting material in said caps surrounding the projecting ends of the strips and forming the sole mechanical support for said strips. I
16. An electrical condenser comprising'an air tight tube of insulating material, a plurality of interleaved relatively narrow metallic strips therein extending longitudinally and spaced apart by layers of dielectric material, the alternate metallic strips having ends projecting'beyond the dielectric toward the opposite ends of the tube, means for clamping the metallic strips and dielectric together, a pair of metallic caps fitted over the ends of the tube and an air tight filling of metallic conducting material in said caps and the ends of the tube surrounding the projecting ends of the strips and formingthe sole mechanical support for said strips.
17. An electrical condenser comprising an enclosing tube of insulating material, a plurality of relatively narrow interleaved metallic strips therein extending longitudinally and spaced apart by layers of dielectric material, the alternate metallic strips having ends projecting on opposite sides beyond the dielectric and the adjacent members being pressed togetherto form contact members at the opposite ends of the tube, a metallic clamping sheath around the strips and dielectric, a pair of air tight metallic closures for the ends of the caslng electrically conductin tric reactance, provided with alternately extending conducting members, an insulated container for said reactance and means expanded against the wall of said container for supporting said reactance at spaced intervals in said container. i
19. As an article of manufacture, an electric reactance, a glass tube and a pair, of expanded metal plugs of low fusing material supporting said reactance at spaced intervals in saidcontainer, and forming an air tight seal with said glass tube for protecting said reactance 20. An electric condenser, comprising an enclosing container, a plurality of interleaved metalic strips extending longitudinally and spaced apart by layers of dielectric material,
the alternate metallic strips extending on op-4 posite sides beyond the dielectric and being integrally united with supporting and COIL- ing said ends,
W. A. GRAHAM.
members, and conducting caps at
US427671A 1920-12-02 1920-12-02 Electrical condenser Expired - Lifetime US1721152A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4502096A (en) * 1983-08-11 1985-02-26 Reynolds Industries Inc. Low-inductance capacitor
US4614995A (en) * 1982-02-03 1986-09-30 Electronic Concepts, Inc. Hermetically sealed ceramic cased surface mount capacitor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4614995A (en) * 1982-02-03 1986-09-30 Electronic Concepts, Inc. Hermetically sealed ceramic cased surface mount capacitor
US4502096A (en) * 1983-08-11 1985-02-26 Reynolds Industries Inc. Low-inductance capacitor

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