US3260905A - Capacitor and terminal stud assembly therefor - Google Patents

Capacitor and terminal stud assembly therefor Download PDF

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Publication number
US3260905A
US3260905A US134316A US13431661A US3260905A US 3260905 A US3260905 A US 3260905A US 134316 A US134316 A US 134316A US 13431661 A US13431661 A US 13431661A US 3260905 A US3260905 A US 3260905A
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spring
washer
cup
assembly
capacitor
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US134316A
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Rigazio Anthony Wayne
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ELECTRICAL UTILITIES Co
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ELECTRICAL UTILITIES Co
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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
    • H01G4/002—Details
    • H01G4/228—Terminals
    • H01G4/236—Terminals leading through the housing, i.e. lead-through
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/43—Electric condenser making
    • Y10T29/435—Solid dielectric type
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49117—Conductor or circuit manufacturing
    • Y10T29/49124—On flat or curved insulated base, e.g., printed circuit, etc.
    • Y10T29/49147—Assembling terminal to base

Definitions

  • the present invention relates generally to a capacitor and method of manufacturing the same.
  • the present invention further relates to different types of terminal assemblies including methods of manufacturing the same.
  • each of the terminal assemblies has a spring secured interally in assembly with it regardless of whether the terminal assembly comprises a terminal stud type assembly or a lead wire type of terminal assembly.
  • the case or shell of the capacitor contains two narrow extrusions which protrude into the cup defined by the shell and which extend parallel to each other to provide a low resistance type contact to the capacitor winding.
  • the capacitor is provided with a spring that is formed from fiat spring material in such a way as to exert high contact pressure between all contact surfaces when the components of the capacitor are assembled.
  • the spring has a base as well as converging legs whereby it provides for a very low contact resistance between the legs of th spring and the other winding electrode.
  • An important object of the present invention is to provide a new and improved capacitor adapted for use principally in ignition and magneto applications for mechanical contact type associations therewith.
  • Another important object of the present invention is to provide a new and improved terminal assembly and method of manufacturing the same.
  • a further object of this invention is to provide a new and improved lead wire terminal assembly and method of manufacturing the same.
  • Yet another object of this invention is to provide a new and improved terminal stud assembly and method of manufacturing the same.
  • Another and still further object of this invention is to provide a new and improved capacitor and method of manufacturing the same.
  • a further object of this invention is to provide a new and improved capacitor which provides a very low electrical contact resistance under severe vibratory conditions whereby it will have long expected life and lend prongs or legs 20b-20b.
  • FIGURE 1 is a bottom view of a capacitor
  • FIGURE 2 is an enlarged cross sectional view taken substantially on the line II-II looking in the direction indicated by the arrows, as seen in FIGURE 1;
  • FIGURE 3 is an enlarged exploded view of the components of the capacitor shown in FIGURES 1 and 2;
  • FIGURE 4 is a fragmentary partially cross sectioned side view of a lead wire type terminal assembly
  • FIGURE 5 is a side view of another modified type of terminal assembly.
  • the reference numeral 10 lesignates a capacitor which the shell 11 is a cylindrical paper tube 16 which has its lower edge 16a engaged against the shell bottom- 12 and its upper edge 16b spaced below the beaded end 15 of the shell 11.
  • Mounted within the shell 11 is a conventional type of foil winding 17.
  • a terminal assembly 18 is adapted to be telescoped within the open end of the shell 11.
  • a force is then exerted between the terminal assembly and the casing bottom 12 as the upper end of the cylindrical side wall 14 is shaped to provide the bead 15 whereby the components of the capacitor 10 are held in unitary assembly.
  • FIGURES 4 and 5 illustrate three different types of terminal assemblies as indicate at 18, and as further shown in FIGURES 4 and 5, all of which are capable of assembly with the other components parts of the capacitor, in the nut to be attached thereto in a conventional manner.
  • the stud sections 23 and 24 are provided with axial shoulders 25 and 26 with the washer being adapted to engage against the shoulder 25 and with the spring 20 being adapted to bottom against the stud shoulder 26.
  • the spring 20 includes a base 20a as well as converging
  • the base leg 20a has a entral opening and the stud section 22 is engaged therein and provided with a riveted end 27 securing the washer 19 as well as the spring 20 in unitary assembly with the stud 21.
  • the spring When the components of the capacitor are assembled, the spring is compressed so that the extrusions or ribs 13 are embedded in the bottom of the winding and so that the prongs 20b are embedded in the opposite end of the winding.
  • the capacitor By engaging the winding between the ribs 13 and the prongs 20b the capacitor is adapted for very low electrical contact resistance under severe vibratory conditions. It will be appreciated that the head 15 when engaged against the washer 19 maintains the prongs 205 as well as the ribs 13 in embedded engagement with respect to the winding.
  • FIGURE 4 a modified type of terminal assembly indicated generally at 38.
  • the terminal assembly 38 includes an insulated wire 39 having an outer layer of insulation 40 as well as a central wire 41.
  • a solderless connector 42 is secured to the wire 41 at one end in a conventional manner.
  • a layer of additional insulation or tape 43 is provided for covering the end of the wire 41.
  • a washer 45 is mounted on an opposite end of the insulated wire 39.
  • the washer 45 is of the laminated type in that it is comprised of a layer of rubber 46 and a layer of Bakelite 47.
  • the washer 45 has a central tubular passage indicated at 46a and 47a with a notched end 44 of the insulated wire 39 secured in locked assembly therewith.
  • the wire 41 has its end turned radially with respect to its axis as indicated at 42 which end is soldered at 43' to a clip 48.
  • the turned end 42' extends through a central passageway 48a. in the base leg of the clip 48.
  • the clip 48 is of the same configuration as the clip 20 described in connection with the embodiment shown in FIGURES 1-3.
  • the terminal assembly 38 may be substituted for the terminal assembly 18 and assembled with the shell 11 in the same manner previously described.
  • FIGURE Shown in FIGURE is still another type of terminal assembly indicated generally at 58.
  • the terminal assembly includes a washer 19 and a clip 20 which are secured to a stud 58' in the same way that the stud 18 is secured to its washer 19 and clip 20.
  • the terminal assembly shown in FIGURE 5 differs from that shown in FIGURE 1 in that it is provided with a ditferent type of means including a transverse passageway 58a and a radially open ing groove area 58b for attachment with a connecting wire.
  • the terminal assembly 58 may be assembled with a shell 11 in the same way that the terminal assembly 18 is assembled with the shell.
  • the capacitor herein disclosed acts as one terminal which is connected to the electrically grounded side of a circuit in which it is applied.
  • One of the winding electrodes makes electrical and mechanical contact with the bottom of the capacitor shell, the other winding electrode (or foil) makes electrical and mechanical contact with a flat spring which is formed from a strip of metal, as generally indicated at 20.
  • the spring 20 is compressed while it is in assembly with the other component parts of the capacitor to provide a solid electrical contact and to maintain high mechanical pressure between all contact surfaces in the capacitor and thus provides means to prevent arcing between said contact surfaces even under a severe mechanical vibrator condition.
  • the spring 20 is stacked to a terminal or soldered to a lead wire which is in turn electrically insulated from the capacitor case to complete the electrical circuit.
  • a method of manufacturing a capacitor which comprises forming a cup-shaped shell, inserting a winding in said shell, forming a terminal stud assembly with a fiat spring on one end, inserting the terminal into an open end of the cup-shaped shell and compressing the spring against the winding, and bending an upper edge of the shell while contemporaneously engaging the bead against an outside surface of the terminal stud assembly securing said spring 4 and said winding under compression in said cup-shaped shell.
  • a method of manufacturing a capacitor which comprises forming a cup-shaped she-ll defining a cup with extrusions on its bottom protruding into the cup, inserting a winding in said shell and resting it on said extrusions, forming a terminal stud assembly with a pronged spring on one end, inserting the terminal stud assembly into an open end of the cup-shaped shell, and heading an upper edge of the shell while contemporaneously engaging the head against an outside surface of the terminal stud assembly securing said spring and said winding under compression in said cup-shaped shell.
  • a method of manufacturing a capacitor which comprises forming a cup-shaped shell defining a cup with extrusions on its bottom protruding into the cup, inserting a winding in said shell and resting it on said extrusions, forming a terminal stud assembly with a spring having prongs on one end, inserting the terminal stud assembly into an open end of the cup-shaped shell, and beading an upper edge of the shell with the bead being engaged against an outside surface of the terminal stud assembly securing said spring and said winding under compression in said cup-shaped shell, the prongs and the extrusions being embedded in opposite ends of the winding and with a bottom end of the winding engaged flush against the bottom of the cup-shaped shell.
  • a method of manufacturing a lead wire assembly comprising the steps of forming a length of insulated wire with the wire extending beyond'the insulation at one end leaving a portion of the wire bare, stacking a washer on the bare wire with the insulation having an edge supporting the washer at one end of the Wire, stacking a metal spring on the washer with the bare wire extending through the washer and the spring, and bending the bare wire extending beyond the spring over into engagement with a side of the spring thereby securing the washer and the spring in unitary assembly.
  • a method of manufacturing a lead wire assembly comprising the steps of forming a length of insulated wire with the wire extending beyond the insulation at one end leaving a portion of the wire bare, stacking a washer on the bare wire with the insulation having an edge supporting the washer at one end of the wire, stacking a metal spring on the washer with the bare wire extending through the washer and the spring, bending the bare wire extending beyond the spring over into engagement with a side of the spring, and attaching the bent portion of the wire with the spring thereby securing the washer and the spring in unitary assembly.
  • a method of manufacturing a lead wire assembly comprising the steps of forming a length of insulated wire having a solderless connector at one end and with the wire extending beyond the insulation at an opposite end leaving a portion of the wire bare, stacking a washer on the bare wire with the insulation having an edge supporting the washer at one end of the wire, stacking a metal spring on the washer with the bare wire extending through the washer and the spring, and bending the bare wire extending beyond the spring over into engagement with a side of the spring thereby securing the washer and spring in unitary assembly.
  • a method of manufacturing a terminal stud assembly including the steps of forming a terminal stud with an axially facing annular shoulder intermediate its opposite ends, stacking a washer and a spring on said stud With said washer engaged against the shoulder, and riveting one of its opposite ends securing the spring and the washer in unitary assembly with the stud.
  • a terminal stud assembly for insertion as a unit into an open end of a capacitor container including a terminal stud with an axially facing annular shoulder intermediate its opposite ends, a circular Washer and a spring stacked on one of said opposite ends with the Washer engaged against the shoulder and with the spring engagec against said washer, said spring being mounted coaxially of said circular washer and with said spring having a base of smaller dimension than a diameter of said circular washer, said one of said opposite ends being enlarged and maintaining the spring and the washer in assembled relation with said stud.
  • a terminal stud assembly for insertion as a unit into an open end of a capacitor container including a terminal stud with an axially facing annular shoulder intermediate its opposite ends, an annular washer and a spring stacked on one'of said opposite ends with the washer engaged against the shoulder and with the spring engaged against said Washer, said one of said opposite ends being enlarged and maintaining the spring and the washer in assembled relation with said stud, said spring having a flat base and converging prongs secured at opposite ends of said base, said spring being mounted coaxially of said annular washer and with said washer having a greater width than the length of said-flat base.
  • a capacitor which comprises a cup-shaped shell defining a cup with extrusions on its bottom protruding into the cup, a winding in said shell and resting on said extrusions, a terminal stud assembly with a spring on one end disposed in an open end of the cup-shaped shell, and a bead on an upper edge of the shell engaged against an outside surface of the terminal stud assembly securing said spring and said winding under compression in said cup-shaped shell, said spring comprising a flat metal strip having converging prongs at opposite ends engaged against said winding.
  • a capacitor which comprises a cup-shaped shell defining a cup, a paper tube in said cup, a winding disposed inside said paper tube in said cup, and a lead wire assembly disposed in an open end of said cup, said lead wire assembly including an insulated wire, a washer and a spring secured to one end of said insulated wire and with an end of said wire projecting through said washer and being locked in assembly therewith, and connecting means joining said end with said spring, said spring being engaged against said winding, said spring, washer and said insulated wire being removable from said cup and insertable into said cup in unison together, said shell having a bead at its open end engaged against said washer securing said spring and said winding under compression in said shell.
  • a capacitor which comprises a cup-shapedshell defining a cup, a paper tube in said cup, -a winding disposed inside said paper tube in said cup, and a lead wire assembly disposed in an open end of said cup, said lead wire assembly including an insulated wire, a washer and a spring secured to one end of said insulated wire, said spring being engaged against said winding, said spring, washer and said insulated wire being removable from said cup and insertable into said cup in unison together, said shell having a bead at its open end engaged against said washer securing said spring and said winding under compression in said shell, said spring having a base and converging prongs embedded in said Winding.
  • the capacitor of claim 11 further characterized by said shell having parallel rib-like extrusions on its bottom protruding into the cup and with said extrusions being embedded in the winding whereby the winding is engaged flush against the bottom of the shell.
  • a capacitor which comprises a cup-shaped shell defining the cup, a paper tube in said cup, a winding disposed inside of said paper tube in said cup, a terminal assembly disposed in said cup, the terminal assembly including a washer engaged against an upper end of said paper tube, the terminal assembly 'further including a pronged spring mounted on an underside of said washer and with saidpronged spring having its prongs engaged against said winding, said terminal assembly including said spring and said washer being removable from said cup and insertable into said cup in unison together, and means engaged between said shell and said washer securing said spring and said winding under compression in said cup-shaped shell.
  • the capacitor of claim 14 further characterized by said terminal assembly including a stud with said stud being riveted in assembly with said washer and said spring.
  • the capacitor of claim 14 further characterized by said terminal assembly comprising a lead wire assembly including an insulated wire, the insulated wire being secured in assembly with said washer and said spring.
  • a capacitor which comprises a metallic cup-shaped shell defining a cup and having a cylindrical Wall joined with a bottom at one end, a non-conductive tube in said cup, a winding disposed inside of said tubeand engaged on the bottom of said cup, a terminal assembly mounted in assembly with said shell and including a terminal element, at flat non-metallic washer having a diameter approximating an inside diameter of said cylindrical wall, a spring disposed on an underside of said washer and comprising a flat spring metal strip of greater length than width and having a flat central portion with opposite ends underturned and disposed in converging relation with respect to the flat central portion and comprising converging prongs, means securing said flat non-metallic washer and said fiat central portion of said spring in flush contact against one another and in fixed assembly with said terminal element, and means comprising a bead on an axially outer end of the cylindrical wall engaged against said washer securing free ends of said converging prongs under compression against said winding and for holding said winding against the bottom of the cup,
  • a capacitor which comprises a metallic cup-shaped shell defining a cup and having a cylindrical wall joined with a bottom at one end, a non-conductive tube in said.
  • a terminal assembly mounted in assembly with said shell and including a terminal element, a flat non-metallic washer having a diameter approximating an inside diameter of said cylindrical wall, a spring disposed on an underside of said washer and comprising a flat spring metal strip of greater length than width and having a flat central portion with opposite ends underturned and disposed in converging relation with respect to the fiat central portion and comprising converging prongs, means securing said fiat non-metallic washer and said flat central portion of said spring in flush contact against one another and in fixed assembly with said terminal element, and means comprising a bead on an axially outer end of the cylindrical wall engaged against said washer securing free ends of said converging prongs under compression against said winding and for holding said win-ding against the bottom of the cup, the spring providing high contact pressure between all surfaces engaged therewith and providing low contact resistance between the prongs and a winding electrode engaged therewith.
  • the capacitor of claim 18 further characterized by said terminal element comprising a metallic stud.
  • the capacitor of claim 18 further characterized by said terminal element comprising a lead wire having a solderless connector on its end remote from said washer.

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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

/9 I .9b M /j/ P 27205 i z E; E 1
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i/WZVG July 12, 1966 A. w. RlGAZlO 3,260,905
CAPACITOR AND TERMINAL STUD ASSEMBLY THEREFOR Filed Aug. 28, 1961 A TTORNEYS United States Patent 3,260,905 CAPACITOR AND TERMINAL STUD ASSEMBLY THEREFOR Anthony Wayne Rigazio, Oglesby, Ill., assignor to Electrical Utilities Company, La Salle, 111., a corporation of Illinois Filed Aug. 28, 1961, Ser. No. 134,316 Claims. (Cl. 317260) The present invention relates generally to a capacitor and method of manufacturing the same. The present invention further relates to different types of terminal assemblies including methods of manufacturing the same.
In accordance with the present invention, each of the terminal assemblies has a spring secured interally in assembly with it regardless of whether the terminal assembly comprises a terminal stud type assembly or a lead wire type of terminal assembly. By securing the spring directly to the terminal assembly, it has been found that the cost of manufacture of the terminal assembly and of the capacitor may be reduced since several parts which were formerly needed can now be eliminated by manufacturing the terminal assembly and the capacitor in accordance with this invention. It will further be appreciated that by reducing the number of parts that the component parts of the capacitor may be assembled with greater ease and at a labor reduced cost. Still further, it will be appreciated that by reducing the num ber of parts in the capacitor that the manufacturing cost may be reduced.
According to an important feature of the present invention, the case or shell of the capacitor contains two narrow extrusions which protrude into the cup defined by the shell and which extend parallel to each other to provide a low resistance type contact to the capacitor winding.
Another important feature concerns the fact that the capacitor is provided with a spring that is formed from fiat spring material in such a way as to exert high contact pressure between all contact surfaces when the components of the capacitor are assembled. The spring has a base as well as converging legs whereby it provides for a very low contact resistance between the legs of th spring and the other winding electrode.
An important object of the present invention is to provide a new and improved capacitor adapted for use principally in ignition and magneto applications for mechanical contact type associations therewith.
Another important object of the present invention is to provide a new and improved terminal assembly and method of manufacturing the same.
A further object of this invention is to provide a new and improved lead wire terminal assembly and method of manufacturing the same.
Yet another object of this invention is to provide a new and improved terminal stud assembly and method of manufacturing the same.
Another and still further object of this invention is to provide a new and improved capacitor and method of manufacturing the same.
A further object of this invention is to provide a new and improved capacitor which provides a very low electrical contact resistance under severe vibratory conditions whereby it will have long expected life and lend prongs or legs 20b-20b.
ice
itself to economical automated assembly at a minimum of expense.
Other objects and features of the present invention will more fully become apparent in view of the following detailed description taken in conjunction with the accompanying drawings and in which:
FIGURE 1 is a bottom view of a capacitor;
FIGURE 2 is an enlarged cross sectional view taken substantially on the line II-II looking in the direction indicated by the arrows, as seen in FIGURE 1;
FIGURE 3 is an enlarged exploded view of the components of the capacitor shown in FIGURES 1 and 2;
FIGURE 4 is a fragmentary partially cross sectioned side view of a lead wire type terminal assembly; and
FIGURE 5 is a side view of another modified type of terminal assembly.
As shown on the drawings:
The reference numeral 10 lesignates a capacitor which the shell 11 is a cylindrical paper tube 16 which has its lower edge 16a engaged against the shell bottom- 12 and its upper edge 16b spaced below the beaded end 15 of the shell 11. Mounted within the shell 11 is a conventional type of foil winding 17.
After the paper tube 16 and the winding 17 have been mounted in the shell 11 a terminal assembly 18 is adapted to be telescoped within the open end of the shell 11. A force is then exerted between the terminal assembly and the casing bottom 12 as the upper end of the cylindrical side wall 14 is shaped to provide the bead 15 whereby the components of the capacitor 10 are held in unitary assembly.
The drawings illustrate three different types of terminal assemblies as indicate at 18, and as further shown in FIGURES 4 and 5, all of which are capable of assembly with the other components parts of the capacitor, in the nut to be attached thereto in a conventional manner.
The stud sections 23 and 24 are provided with axial shoulders 25 and 26 with the washer being adapted to engage against the shoulder 25 and with the spring 20 being adapted to bottom against the stud shoulder 26. v
The spring 20 includes a base 20a as well as converging The base leg 20a has a entral opening and the stud section 22 is engaged therein and provided with a riveted end 27 securing the washer 19 as well as the spring 20 in unitary assembly with the stud 21.
When the components of the capacitor are assembled, the spring is compressed so that the extrusions or ribs 13 are embedded in the bottom of the winding and so that the prongs 20b are embedded in the opposite end of the winding. By engaging the winding between the ribs 13 and the prongs 20b the capacitor is adapted for very low electrical contact resistance under severe vibratory conditions. It will be appreciated that the head 15 when engaged against the washer 19 maintains the prongs 205 as well as the ribs 13 in embedded engagement with respect to the winding.
In FIGURE 4 is shown a modified type of terminal assembly indicated generally at 38. The terminal assembly 38 includes an insulated wire 39 having an outer layer of insulation 40 as well as a central wire 41. A solderless connector 42 is secured to the wire 41 at one end in a conventional manner. A layer of additional insulation or tape 43 is provided for covering the end of the wire 41.
A washer 45 is mounted on an opposite end of the insulated wire 39. The washer 45 is of the laminated type in that it is comprised of a layer of rubber 46 and a layer of Bakelite 47. The washer 45 has a central tubular passage indicated at 46a and 47a with a notched end 44 of the insulated wire 39 secured in locked assembly therewith. The wire 41 has its end turned radially with respect to its axis as indicated at 42 which end is soldered at 43' to a clip 48. The turned end 42' extends through a central passageway 48a. in the base leg of the clip 48. The clip 48 is of the same configuration as the clip 20 described in connection with the embodiment shown in FIGURES 1-3.
The terminal assembly 38 may be substituted for the terminal assembly 18 and assembled with the shell 11 in the same manner previously described.
Shown in FIGURE is still another type of terminal assembly indicated generally at 58. The terminal assembly includes a washer 19 and a clip 20 which are secured to a stud 58' in the same way that the stud 18 is secured to its washer 19 and clip 20. The terminal assembly shown in FIGURE 5 differs from that shown in FIGURE 1 in that it is provided with a ditferent type of means including a transverse passageway 58a and a radially open ing groove area 58b for attachment with a connecting wire. The terminal assembly 58 may be assembled with a shell 11 in the same way that the terminal assembly 18 is assembled with the shell.
In conclusion, it will be appreciated the capacitor herein disclosed acts as one terminal which is connected to the electrically grounded side of a circuit in which it is applied. One of the winding electrodes makes electrical and mechanical contact with the bottom of the capacitor shell, the other winding electrode (or foil) makes electrical and mechanical contact with a flat spring which is formed from a strip of metal, as generally indicated at 20.
The spring 20 is compressed while it is in assembly with the other component parts of the capacitor to provide a solid electrical contact and to maintain high mechanical pressure between all contact surfaces in the capacitor and thus provides means to prevent arcing between said contact surfaces even under a severe mechanical vibrator condition. The spring 20 is stacked to a terminal or soldered to a lead wire which is in turn electrically insulated from the capacitor case to complete the electrical circuit.
It will be understood that modifications and variations may be effected without departing from the scope of the novel concepts of the present invention.
I claim as my invention:
1. A method of manufacturing a capacitor which comprises forming a cup-shaped shell, inserting a winding in said shell, forming a terminal stud assembly with a fiat spring on one end, inserting the terminal into an open end of the cup-shaped shell and compressing the spring against the winding, and bending an upper edge of the shell while contemporaneously engaging the bead against an outside surface of the terminal stud assembly securing said spring 4 and said winding under compression in said cup-shaped shell.
2. A method of manufacturing a capacitor which comprises forming a cup-shaped she-ll defining a cup with extrusions on its bottom protruding into the cup, inserting a winding in said shell and resting it on said extrusions, forming a terminal stud assembly with a pronged spring on one end, inserting the terminal stud assembly into an open end of the cup-shaped shell, and heading an upper edge of the shell while contemporaneously engaging the head against an outside surface of the terminal stud assembly securing said spring and said winding under compression in said cup-shaped shell.
3. A method of manufacturing a capacitor which comprises forming a cup-shaped shell defining a cup with extrusions on its bottom protruding into the cup, inserting a winding in said shell and resting it on said extrusions, forming a terminal stud assembly with a spring having prongs on one end, inserting the terminal stud assembly into an open end of the cup-shaped shell, and beading an upper edge of the shell with the bead being engaged against an outside surface of the terminal stud assembly securing said spring and said winding under compression in said cup-shaped shell, the prongs and the extrusions being embedded in opposite ends of the winding and with a bottom end of the winding engaged flush against the bottom of the cup-shaped shell.
4. A method of manufacturing a lead wire assembly comprising the steps of forming a length of insulated wire with the wire extending beyond'the insulation at one end leaving a portion of the wire bare, stacking a washer on the bare wire with the insulation having an edge supporting the washer at one end of the Wire, stacking a metal spring on the washer with the bare wire extending through the washer and the spring, and bending the bare wire extending beyond the spring over into engagement with a side of the spring thereby securing the washer and the spring in unitary assembly.
5. A method of manufacturing a lead wire assembly comprising the steps of forming a length of insulated wire with the wire extending beyond the insulation at one end leaving a portion of the wire bare, stacking a washer on the bare wire with the insulation having an edge supporting the washer at one end of the wire, stacking a metal spring on the washer with the bare wire extending through the washer and the spring, bending the bare wire extending beyond the spring over into engagement with a side of the spring, and attaching the bent portion of the wire with the spring thereby securing the washer and the spring in unitary assembly.
6. A method of manufacturing a lead wire assembly comprising the steps of forming a length of insulated wire having a solderless connector at one end and with the wire extending beyond the insulation at an opposite end leaving a portion of the wire bare, stacking a washer on the bare wire with the insulation having an edge supporting the washer at one end of the wire, stacking a metal spring on the washer with the bare wire extending through the washer and the spring, and bending the bare wire extending beyond the spring over into engagement with a side of the spring thereby securing the washer and spring in unitary assembly.
7. A method of manufacturing a terminal stud assembly including the steps of forming a terminal stud with an axially facing annular shoulder intermediate its opposite ends, stacking a washer and a spring on said stud With said washer engaged against the shoulder, and riveting one of its opposite ends securing the spring and the washer in unitary assembly with the stud.
8. A terminal stud assembly for insertion as a unit into an open end of a capacitor container including a terminal stud with an axially facing annular shoulder intermediate its opposite ends, a circular Washer and a spring stacked on one of said opposite ends with the Washer engaged against the shoulder and with the spring engagec against said washer, said spring being mounted coaxially of said circular washer and with said spring having a base of smaller dimension than a diameter of said circular washer, said one of said opposite ends being enlarged and maintaining the spring and the washer in assembled relation with said stud.
9. A terminal stud assembly for insertion as a unit into an open end of a capacitor container including a terminal stud with an axially facing annular shoulder intermediate its opposite ends, an annular washer and a spring stacked on one'of said opposite ends with the washer engaged against the shoulder and with the spring engaged against said Washer, said one of said opposite ends being enlarged and maintaining the spring and the washer in assembled relation with said stud, said spring having a flat base and converging prongs secured at opposite ends of said base, said spring being mounted coaxially of said annular washer and with said washer having a greater width than the length of said-flat base.
10. A capacitor which comprises a cup-shaped shell defining a cup with extrusions on its bottom protruding into the cup, a winding in said shell and resting on said extrusions, a terminal stud assembly with a spring on one end disposed in an open end of the cup-shaped shell, and a bead on an upper edge of the shell engaged against an outside surface of the terminal stud assembly securing said spring and said winding under compression in said cup-shaped shell, said spring comprising a flat metal strip having converging prongs at opposite ends engaged against said winding.
11. A capacitor which comprises a cup-shaped shell defining a cup, a paper tube in said cup, a winding disposed inside said paper tube in said cup, and a lead wire assembly disposed in an open end of said cup, said lead wire assembly including an insulated wire, a washer and a spring secured to one end of said insulated wire and with an end of said wire projecting through said washer and being locked in assembly therewith, and connecting means joining said end with said spring, said spring being engaged against said winding, said spring, washer and said insulated wire being removable from said cup and insertable into said cup in unison together, said shell having a bead at its open end engaged against said washer securing said spring and said winding under compression in said shell.
12. A capacitor which comprises a cup-shapedshell defining a cup, a paper tube in said cup, -a winding disposed inside said paper tube in said cup, and a lead wire assembly disposed in an open end of said cup, said lead wire assembly including an insulated wire, a washer and a spring secured to one end of said insulated wire, said spring being engaged against said winding, said spring, washer and said insulated wire being removable from said cup and insertable into said cup in unison together, said shell having a bead at its open end engaged against said washer securing said spring and said winding under compression in said shell, said spring having a base and converging prongs embedded in said Winding.
13. The capacitor of claim 11 further characterized by said shell having parallel rib-like extrusions on its bottom protruding into the cup and with said extrusions being embedded in the winding whereby the winding is engaged flush against the bottom of the shell.
14. A capacitor which comprises a cup-shaped shell defining the cup, a paper tube in said cup, a winding disposed inside of said paper tube in said cup, a terminal assembly disposed in said cup, the terminal assembly including a washer engaged against an upper end of said paper tube, the terminal assembly 'further including a pronged spring mounted on an underside of said washer and with saidpronged spring having its prongs engaged against said winding, said terminal assembly including said spring and said washer being removable from said cup and insertable into said cup in unison together, and means engaged between said shell and said washer securing said spring and said winding under compression in said cup-shaped shell.
15. The capacitor of claim 14 further characterized by said terminal assembly including a stud with said stud being riveted in assembly with said washer and said spring.
16. The capacitor of claim 14 further characterized by said terminal assembly comprising a lead wire assembly including an insulated wire, the insulated wire being secured in assembly with said washer and said spring.
17. A capacitor which comprises a metallic cup-shaped shell defining a cup and having a cylindrical Wall joined with a bottom at one end, a non-conductive tube in said cup, a winding disposed inside of said tubeand engaged on the bottom of said cup, a terminal assembly mounted in assembly with said shell and including a terminal element, at flat non-metallic washer having a diameter approximating an inside diameter of said cylindrical wall, a spring disposed on an underside of said washer and comprising a flat spring metal strip of greater length than width and having a flat central portion with opposite ends underturned and disposed in converging relation with respect to the flat central portion and comprising converging prongs, means securing said flat non-metallic washer and said fiat central portion of said spring in flush contact against one another and in fixed assembly with said terminal element, and means comprising a bead on an axially outer end of the cylindrical wall engaged against said washer securing free ends of said converging prongs under compression against said winding and for holding said winding against the bottom of the cup, the spring providing high contact pressure between all surfaces engaged therewith and providing low contact resistance between the prongs and a winding electrode engaged therewith, said bottom of .said cup having parallel ribs embedded in said winding to provide a low resistance type contact with the winding.
18. A capacitor which comprises a metallic cup-shaped shell defining a cup and having a cylindrical wall joined with a bottom at one end, a non-conductive tube in said.
cup, a winding disposed inside of said tube and engaged on the bottom of said cup, a terminal assembly mounted in assembly with said shell and including a terminal element, a flat non-metallic washer having a diameter approximating an inside diameter of said cylindrical wall, a spring disposed on an underside of said washer and comprising a flat spring metal strip of greater length than width and having a flat central portion with opposite ends underturned and disposed in converging relation with respect to the fiat central portion and comprising converging prongs, means securing said fiat non-metallic washer and said flat central portion of said spring in flush contact against one another and in fixed assembly with said terminal element, and means comprising a bead on an axially outer end of the cylindrical wall engaged against said washer securing free ends of said converging prongs under compression against said winding and for holding said win-ding against the bottom of the cup, the spring providing high contact pressure between all surfaces engaged therewith and providing low contact resistance between the prongs and a winding electrode engaged therewith.
19. The capacitor of claim 18 further characterized by said terminal element comprising a metallic stud.
20. The capacitor of claim 18 further characterized by said terminal element comprising a lead wire having a solderless connector on its end remote from said washer.
References Cited by the Examiner UNITED STATES PATENTS 1,580,873 4/1926 Weldon 3 l7260 1,636,328 7/1927 Sauer 3 l7260 2,029,430 2/1936 Kopin-Ski 317270 (Other references on following page) UNITED 7 8 STATES PATENTS 2,963,775 12/1960 Chadwick 29-15555 Edmundson 317 26O 3,109,127 10/1963 Guetersloh 317-260 Schneider 317-260 FOREIGN PATENTS Ramos 339-253 M Wagner 29 25-42 5 1,148,001 12/1957 Trance. LEWIS ROBERT K. SCHAEFER, Prinmry Examine/ Modrey 339-220 Clemons JOHN F. BURNS, Exammcr. Riley 317-242 I. S. RAPPAPORT, E. GOLDBERG, Clark 29-15555 10 Assistant Examiners.
Clemons 29-25 .42

Claims (2)

  1. 8. A TERMINAL STUD ASSEMBLY FOR INSERTION AS A UNIT INTO AN OPEN END OF A CAPACITOR CONTAINER INCLUDING A TERMINAL STUD WITH AN AXIALLY FACING ANNULAR SHOULDER INTERMEDIATE ITS OPPOSITE ENDS, A CIRCULAR WASHER AND A SPRING STACKED ON ONE OF SAID OPPOSITE ENDS WITH THE WASHER ENGAGED AGAINST THE SHOULDER AND WITH THE SPRING ENGAGED AGINST SAID WASHER, SAID SPRING BEING MOUNTED COAXIALLY OF SAID CIRCULAR WASHER AND WITH SAID SPRING HAVING A BASE OF SMALLER DIMENSION THAN A DIAMETER OF SAID CIRCULAR WASHER, SAID ONE OF SAID OPPOSITE ENDS BEING ENLARGED AND MAINTAINING THE SPRING AND THE WASHER IN ASSEMBLED RELATION WITH SAID STUD.
  2. 11. A CAPACITOR WHICH COMPRISES A CUP-SHAPED SHELL DEFINING A CUP, A PAPER TUBE IN SAID CUP, A WINDING DISPOSED INSIDE SAID PAPER TUBE IN SAID CUP, AND A LEAD WIRE ASSEMBLY DISPOSED IN AN OPEN END OF SAID CUP, SAID LEAD WIRE ASSEMBLY INCLUDING AN INSULATED WIRE, A WASHER AND A SPRING SECURED TO ONE END OF SAID INSULATED WIRE AND WITH AN END OF SAID WIRE PROJECTING THROUGH SAID WASHER AND BEING LOCKED IN ASSEMBLY THEREWITH, AND CONNECTING MEANS JOINING SAID END WITH SAID SPRING, SAID SPRING BEING ENGAGED AGAINST SAID WINDING, SAID SPRING, WASHER AND SAID INSULATED WIRE BEING REMOVABLE FROM SAID CUP AND INSERTABLE INTO SAID CUP IN UNISON TOGETHER, SAID SHELL HAVING A BEAD AT ITS OPEN END ENGAGED AGAINST SAID WASHER SECURING SAID SPRING AND SAID WINDING UNDER COMPRESSION IN SAID SHELL.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3956677A (en) * 1973-04-02 1976-05-11 Electrical Utilities Company Ignition type capacitor
US20040147174A1 (en) * 2003-01-20 2004-07-29 Delta Electronics, Inc. Socket structure and method for forming the same

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US1580873A (en) * 1924-06-07 1926-04-13 Gen Electric Static condenser
US1636328A (en) * 1924-05-23 1927-07-19 Kellogg Switchboard & Supply Condenser
US2029430A (en) * 1934-05-14 1936-02-04 John E Fast & Company Tubular condenser
US2323124A (en) * 1940-03-06 1943-06-29 Gen Motors Corp Electrical condenser
US2539332A (en) * 1947-12-22 1951-01-23 William G Schneider Electrical condenser
US2650286A (en) * 1951-06-27 1953-08-25 Int Register Co Electrical terminal
US2695443A (en) * 1950-04-19 1954-11-30 Aerovox Corp Method of making capactiors
FR1148001A (en) * 1956-02-02 1957-12-03 Holding Ind & Financiere Method of making internal earth contact in ignition capacitors for explosion engines
US2899672A (en) * 1959-08-11 Electrical terminal stud
US2909758A (en) * 1953-09-24 1959-10-20 Henry J Modrey Explosive terminal and method of firing
US2921113A (en) * 1954-05-12 1960-01-12 Western Electric Co Electrical condensers
US2941258A (en) * 1954-04-05 1960-06-21 Mallory & Co Inc P R Method of assembling and encapsulating a plurality of electrical condensers
US2944325A (en) * 1953-04-27 1960-07-12 Richard U Clark Method of making hermetically sealed electric terminals
US2963771A (en) * 1956-01-23 1960-12-13 Western Electric Co Methods of making electrical capacitors
US2963775A (en) * 1959-06-24 1960-12-13 Thomas & Betts Corp Method of assembling terminal connectors
US3109127A (en) * 1960-10-10 1963-10-29 Gen Motors Corp Electrical condenser container closure

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Publication number Priority date Publication date Assignee Title
US2899672A (en) * 1959-08-11 Electrical terminal stud
US1636328A (en) * 1924-05-23 1927-07-19 Kellogg Switchboard & Supply Condenser
US1580873A (en) * 1924-06-07 1926-04-13 Gen Electric Static condenser
US2029430A (en) * 1934-05-14 1936-02-04 John E Fast & Company Tubular condenser
US2323124A (en) * 1940-03-06 1943-06-29 Gen Motors Corp Electrical condenser
US2539332A (en) * 1947-12-22 1951-01-23 William G Schneider Electrical condenser
US2695443A (en) * 1950-04-19 1954-11-30 Aerovox Corp Method of making capactiors
US2650286A (en) * 1951-06-27 1953-08-25 Int Register Co Electrical terminal
US2944325A (en) * 1953-04-27 1960-07-12 Richard U Clark Method of making hermetically sealed electric terminals
US2909758A (en) * 1953-09-24 1959-10-20 Henry J Modrey Explosive terminal and method of firing
US2941258A (en) * 1954-04-05 1960-06-21 Mallory & Co Inc P R Method of assembling and encapsulating a plurality of electrical condensers
US2921113A (en) * 1954-05-12 1960-01-12 Western Electric Co Electrical condensers
US2963771A (en) * 1956-01-23 1960-12-13 Western Electric Co Methods of making electrical capacitors
FR1148001A (en) * 1956-02-02 1957-12-03 Holding Ind & Financiere Method of making internal earth contact in ignition capacitors for explosion engines
US2963775A (en) * 1959-06-24 1960-12-13 Thomas & Betts Corp Method of assembling terminal connectors
US3109127A (en) * 1960-10-10 1963-10-29 Gen Motors Corp Electrical condenser container closure

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3956677A (en) * 1973-04-02 1976-05-11 Electrical Utilities Company Ignition type capacitor
US20040147174A1 (en) * 2003-01-20 2004-07-29 Delta Electronics, Inc. Socket structure and method for forming the same
US7118425B2 (en) * 2003-01-20 2006-10-10 Delta Electronics, Inc. Socket structure and method for forming the same

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