US2248675A - Multiple finger electrical contact and method of making the same - Google Patents

Multiple finger electrical contact and method of making the same Download PDF

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US2248675A
US2248675A US300939A US30093939A US2248675A US 2248675 A US2248675 A US 2248675A US 300939 A US300939 A US 300939A US 30093939 A US30093939 A US 30093939A US 2248675 A US2248675 A US 2248675A
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contact
fingers
finger
terminal portion
blank
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Huppert William
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R25/00—Coupling parts adapted for simultaneous co-operation with two or more identical counterparts, e.g. for distributing energy to two or more circuits
    • H01R25/006—Coupling parts adapted for simultaneous co-operation with two or more identical counterparts, e.g. for distributing energy to two or more circuits the coupling part being secured to apparatus or structure, e.g. duplex wall receptacle
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12229—Intermediate article [e.g., blank, etc.]
    • Y10T428/12264—Intermediate article [e.g., blank, etc.] having outward flange, gripping means or interlocking feature
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12354—Nonplanar, uniform-thickness material having symmetrical channel shape or reverse fold [e.g., making acute angle, etc.]
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12361—All metal or with adjacent metals having aperture or cut

Definitions

  • This invention relates to a multiple finger electrical contact and method of making the same, and more particularly to contacts for use in multiple outlets adapted to receive two or more plugs for making connection with various electrical attachments or appliances.
  • That outlet contains two contact members each having a terminal connected to one of the feed lines and each having two or more diverging resilient contact fingers for making connection with the prongs of the plugs.
  • One of the fingers makes contact with a prong of one plug and the other makes contact with a prong of another plug, both on the same side of the feed line.
  • One of the objects of this invention is to produce one piece multiple finger contacts of the character described with a minimum waste of material. Another object isto provide multiple finger contacts having integral terminal portions, made of a single piece of metal, of simplified construction, and which are inexpensive to manufacture.
  • a further object is to provide a novel method of bending the blanks into shape whereby the contact fingers, originally stamped out in parallel relation, are spread apart in the required angular relation to fit properly into the outlet casing.
  • A-feature of the invention is that the arrangement of the terminal and finger portions of the contacts is such that the height of the outlet casing with which they are used may be appreciably reduced, thus efiecting an economy in cost of the completed outlet.
  • Fig. 2 is a perspective view of the contact in an intermediate step in the process of its formation
  • Fig. 3 is a perspective View of the completed contact
  • Fig. 4 is a bottom view of a multiple outlet with the insulating disk partly broken awayto show the contact in place;
  • Fig. 5 is a cross-section on the line 5-5 of Fig.
  • Fig. 6 shows a modification of the blank; and.
  • Fig. '7 is a perspective View of a modified form of contact.
  • a blank ID of suitable shape such for example as shown in Figure 1
  • the blanks are preferably stamped out lengthwise of the metal strip or sheet so that the contact fingers will extend in the direction of the grain of the material. This provides a-construction in which the contact fingers have increased and more durable resiliency.
  • the lower portion of the blank. is divided into I two separate fingers H and I2 by a slit orcut l3 that. extends longitudinally of the blank upward to the point l4. Since the overall width of the lower portion of the blank is substantially that of thetwo separate fingers combined,practically-no material is wasted in stamping out the fingers.
  • the upper portion of the blank when it has been bent to shape as shown in Figs. 2 and3, forms the terminal portion N3 of the finished contact member.
  • a hole l6 may be formed in'the terminal portion for reception of a binding or terminal screw. I-Iowever,,other means for attachingthe feed wire to the terminal may be employed.
  • 5 is bent back out of the plane of the finger portion along a transverse line H as shown in Fig. 2. It will be noted that'the u per end Id of the dividing line l3 extends up to this line of bend.
  • the contact fingers H and I2 may themselves eachbe doubled over-"along a transverse line l2. to provide increased resiliency: however, such bending is not essential.
  • the side edges of the terminal portion may be bent up as seen in Figs. 2 and 3.
  • the final step in forming the finished contact member shown in Fig. 3 is to bend or crimp the terminal portion l5 downwardly, in an angular bend, along the longitudinal center lineywhich line is indicated by the numeral I8in Fig. '1 and is in line with slit l3.
  • This bending operation causes the two contact fingers I l' and I2 to spread apart at an angle to each other.
  • the relationship between this angular bend and the spread of the fingers is such that the sum of the two angles is always 180. For instance, if it is desired to spread the contact fingers at an angle of 60 then the angularity of the applied bend or crimp would be 120.
  • This final bending operation is an important feature of the invention as it permits of forming, without waste of material, a one piece contact member having contact fingers that diverge angularly from'each other.
  • FIG. 4 An outlet in which the contact members may be used is shown in Figs. 4 and 5; The outlet.
  • the outlet is designed to receive two standard plugs (not shown).
  • the casing houses two contact members each seated in a recess. One feed wire is connected 'to'the terminal portion '5 of each contact by a binding screw 2
  • the casing has apertures 22 into which the prongs of the plugs are inserted to make contact with the contact fingers l l and I2. 23 is a cover disk of insulating fibre which is held in place by a screw 24.
  • the prongs of the plugs may be inserted to their full extent into the openings-220i the outlet casing without interference with the terminal portions l5 of the contact members. This permits of a considerable reduction in'the height of the casing Without impairing theefiiciency'of the contact between the contactfin gers' and the prongs.
  • FIG. 7 A inodific'atienof the invention is illustrated in Figs; '6 and 7 wherein is shown a contact member having three contact fingers for use in an outlet designed to accommodate three plugs.
  • the blank 25 is formed with three contact fingers 26, 21 and Z8, and a terminal portion 29.
  • the fingers are separated by cuts or slits 3 0 that extend upwardly to points 3
  • the contact fingers may eachbe bent over on the line 32 and the terminal portion may be bent back en the line'33l "In the"fi nal bending operation, the terminal portion is bent or crimped at an angle along each of the lines i fi and 35 to separatethe twoouter contact fingers from themiddle one, as seen in Fig. 7.
  • the side edges of the terminal portion may be formed with sharp teeth 36 to provide a prick point contact with the feed line.
  • IL A method of making a one piece multiple finger electrical contact which comprises forming froma fiat piece of conductor metal a blank having a terminal portion and a finger portion, diwding the finger portion lengthwise into a plurality of separate fingers, bending the blank transversely along a line between the terminal and finger portionsfand spreading the fingers to a desired angle by bending the terminal portion longitudinally.
  • a method of making a one piece multiple finger electrical contact which comprises forming from a flat piece of conductor metal a blank having a terminal portion and a finger portion, dividing the finger portion lengthwise into a plurality of separate fingers, the width of the finger portion of the blank being substantially equal to the combined widths of the separate fingers, bending the blank transversely along a line between the terminal and finger portions, and spreading the fingers to a desired angle by bending the terminal portion longitudinally.
  • a method of making a one piece multiple finger electrical contact which comprises stamping out longitudinally from a flat piece of conductor metal a blank having a terminal portion and a finger portion, bending the blank transversely along a line between the terminal and finger portions, and spreading the fingers to a desired angle by bending the terminal portion longitudinally.
  • a method of making a one piece multiple finger electrical contact which comprises forming from a flat piece of conductor metal a blank having a terminal portion and a finger portion, dividing the finger portion lengthwise into a plurality of separate fingers, bending the blank transversely along a line between the terminal and finger portions, and spreading the fingers to a desired angle by bending the terminal portion longitudinally along a line which is a continuation of the line of separation of the fingers.
  • a method of making a one piece multiple finger electrical con-tact which comprises forming from a flat piece of conductor metal a blank having a terminal portion and a finger portion, separating the finger portion lengthwise to form a plurality of individual fingers, bending the terminal portion back out of the plane of the finger portion, doubling over the finger portion, and spreading the fingers'by bending the terminal portion longitudinally downward at an angle.
  • a one piece multiple finger electrical contact comprising a metal blank having a terminal portion and a finger portion, the finger portion being divided longitudinally into a plurality of substantially parallel contact fingers, said contact fingers being bent downwardly from the terminal portion and spread apart at an angle to each other.
  • a one piece multiple finger electrical contact comprising a metal blank having a terminal portion and a finger portion, the finger portion being divided longitudinally into a plurality of substantially parallel contact fingers, the contact fingers being bent downwardly from the terminal portion and spread apart at an angle to each other, the grain of the contact fingers having the same relationship to their longitudinal axes as the grain of the terminal portion has to its longitudinal axis.
  • a one piece multiple finger electrical contact comprising a metal blank having a terminal portion and a finger portion, the finger portion being divided longitudinally into a plurality of .contact fingers, said terminal portion having a transverse angular bend, the contact fingers being bent downwardly from the terminal portion and spread apart at an angle to each other, the relationship between transverse angular bend of the terminal portion and the angle that the contact fingers make with each other being such that the sum of the two angles is WILLIAM HUPPERT.

Description

w. HUPPERT 2,248,675
MULTIPLE FINGER ELECTRICAL CONTACT AND METHOD OF MAKING THE SAME July 8, 1941.
Filed Oct; 24, 1939 INVENTOR w/fiawr Hufifier'f.
BY v
, ATTORNEY Patented July 8 1941 IVIULTIPLE FINGER ELECTRICAL CONTACT AND METHOD OF MAKING THE. SAME William Huppert, New York, N. Y. I Application October- 24, 1939, Serial No. 300,939
8 Claims.
This invention relates to a multiple finger electrical contact and method of making the same, and more particularly to contacts for use in multiple outlets adapted to receive two or more plugs for making connection with various electrical attachments or appliances.
A form of such multiple outlet is shown and described in my Patent No. 1,818,804 of August 11, 1931. That outlet contains two contact members each having a terminal connected to one of the feed lines and each having two or more diverging resilient contact fingers for making connection with the prongs of the plugs. One of the fingers makes contact with a prong of one plug and the other makes contact with a prong of another plug, both on the same side of the feed line.
Heretofore such multiple contacts have generally been made of two or more pieces of conductor metal riveted or otherwise secured together. This has materially increased the cost of production.
It has also been proposed to make single piece contacts by stamping them from a fiat blank of conductor metal with the contact fingers disposed in angular relation to each other, the portion of the blank between the fingers being cut out. However, this manner of manufacture is objectionable since it results in an excessive waste of material.
One of the objects of this invention is to produce one piece multiple finger contacts of the character described with a minimum waste of material. Another object isto provide multiple finger contacts having integral terminal portions, made of a single piece of metal, of simplified construction, and which are inexpensive to manufacture.
A further object is to provide a novel method of bending the blanks into shape whereby the contact fingers, originally stamped out in parallel relation, are spread apart in the required angular relation to fit properly into the outlet casing.
A-feature of the invention is that the arrangement of the terminal and finger portions of the contacts is such that the height of the outlet casing with which they are used may be appreciably reduced, thus efiecting an economy in cost of the completed outlet.
The foregoing, as well as other novel features of the invention, will appear more fully from the following description thereof, reference being had to the accompanying drawing, in which- Figure 1 is a face view of a fiat blank for a two finger contact;
Fig. 2 is a perspective view of the contact in an intermediate step in the process of its formation; Fig. 3 is a perspective View of the completed contact;
Fig. 4 is a bottom view of a multiple outlet with the insulating disk partly broken awayto show the contact in place;
Fig. 5 is a cross-section on the line 5-5 of Fig.
Fig. 6 shows a modification of the blank; and. Fig. '7 is a perspective View of a modified form of contact.
In making a two finger contact member, a blank ID of suitable shape, such for example as shown in Figure 1, is formed or stamped from a fiat strip or sheet of brass, copper, or, other conductor metal. The blanks are preferably stamped out lengthwise of the metal strip or sheet so that the contact fingers will extend in the direction of the grain of the material. This provides a-construction in which the contact fingers have increased and more durable resiliency. 1 The lower portion of the blank. is divided into I two separate fingers H and I2 by a slit orcut l3 that. extends longitudinally of the blank upward to the point l4. Since the overall width of the lower portion of the blank is substantially that of thetwo separate fingers combined,practically-no material is wasted in stamping out the fingers.
The upper portion of the blank, when it has been bent to shape as shown in Figs. 2 and3, forms the terminal portion N3 of the finished contact member. A hole l6 may be formed in'the terminal portion for reception of a binding or terminal screw. I-Iowever,,other means for attachingthe feed wire to the terminal may be employed.
The terminal portion |5 is bent back out of the plane of the finger portion along a transverse line H as shown in Fig. 2. It will be noted that'the u per end Id of the dividing line l3 extends up to this line of bend. The contact fingers H and I2 may themselves eachbe doubled over-"along a transverse line l2. to provide increased resiliency: however, such bending is not essential. The side edges of the terminal portion may be bent up as seen in Figs. 2 and 3.
The final step in forming the finished contact member shown in Fig. 3 is to bend or crimp the terminal portion l5 downwardly, in an angular bend, along the longitudinal center lineywhich line is indicated by the numeral I8in Fig. '1 and is in line with slit l3. This bending operation causes the two contact fingers I l' and I2 to spread apart at an angle to each other. The relationship between this angular bend and the spread of the fingers is such that the sum of the two angles is always 180. For instance, if it is desired to spread the contact fingers at an angle of 60 then the angularity of the applied bend or crimp would be 120.
This final bending operation is an important feature of the invention as it permits of forming, without waste of material, a one piece contact member having contact fingers that diverge angularly from'each other.
In the finished form of the contact member the point of the angle between the contact fingers falls directly in the line of the front edge ll of the terminal portion [5, as seen in Fig. 3.
An outlet in which the contact members may be used is shown in Figs. 4 and 5; The outlet.
comprises a shell or casing P9 of insulating material, preferably a molded plastic. The outlet is designed to receive two standard plugs (not shown). The casing houses two contact members each seated in a recess. One feed wire is connected 'to'the terminal portion '5 of each contact by a binding screw 2| or other suitable means. The casing has apertures 22 into which the prongs of the plugs are inserted to make contact with the contact fingers l l and I2. 23 is a cover disk of insulating fibre which is held in place by a screw 24.
It will be apparent that the prongs of the plugsmay be inserted to their full extent into the openings-220i the outlet casing without interference with the terminal portions l5 of the contact members. This permits of a considerable reduction in'the height of the casing Without impairing theefiiciency'of the contact between the contactfin gers' and the prongs.
A inodific'atienof the invention is illustrated in Figs; '6 and 7 wherein is shown a contact member having three contact fingers for use in an outlet designed to accommodate three plugs. In this instance the blank 25 is formed with three contact fingers 26, 21 and Z8, and a terminal portion 29. The fingers are separated by cuts or slits 3 0 that extend upwardly to points 3|. The contact fingers may eachbe bent over on the line 32 and the terminal portion may be bent back en the line'33l "In the"fi nal bending operation, the terminal portion is bent or crimped at an angle along each of the lines i fi and 35 to separatethe twoouter contact fingers from themiddle one, as seen in Fig. 7.
The side edges of the terminal portion may be formed with sharp teeth 36 to provide a prick point contact with the feed line.
Various modifications in the construction and method of manufacture herein described may be made by those skilled in the art without departing fromthe scope of the invention as defined in the claims.
' What I claim is:
IL A method of making a one piece multiple finger electrical contact, which comprises forming froma fiat piece of conductor metal a blank having a terminal portion and a finger portion, diwding the finger portion lengthwise into a plurality of separate fingers, bending the blank transversely along a line between the terminal and finger portionsfand spreading the fingers to a desired angle by bending the terminal portion longitudinally.
V 2. A method of making a one piece multiple finger electrical contact which comprises forming from a flat piece of conductor metal a blank having a terminal portion and a finger portion, dividing the finger portion lengthwise into a plurality of separate fingers, the width of the finger portion of the blank being substantially equal to the combined widths of the separate fingers, bending the blank transversely along a line between the terminal and finger portions, and spreading the fingers to a desired angle by bending the terminal portion longitudinally.
3. A method of making a one piece multiple finger electrical contact, which comprises stamping out longitudinally from a flat piece of conductor metal a blank having a terminal portion and a finger portion, bending the blank transversely along a line between the terminal and finger portions, and spreading the fingers to a desired angle by bending the terminal portion longitudinally.
4. A method of making a one piece multiple finger electrical contact, which comprises forming from a flat piece of conductor metal a blank having a terminal portion and a finger portion, dividing the finger portion lengthwise into a plurality of separate fingers, bending the blank transversely along a line between the terminal and finger portions, and spreading the fingers to a desired angle by bending the terminal portion longitudinally along a line which is a continuation of the line of separation of the fingers.
5. A method of making a one piece multiple finger electrical con-tact, which comprises forming from a flat piece of conductor metal a blank having a terminal portion and a finger portion, separating the finger portion lengthwise to form a plurality of individual fingers, bending the terminal portion back out of the plane of the finger portion, doubling over the finger portion, and spreading the fingers'by bending the terminal portion longitudinally downward at an angle.
6. A one piece multiple finger electrical contact comprising a metal blank having a terminal portion and a finger portion, the finger portion being divided longitudinally into a plurality of substantially parallel contact fingers, said contact fingers being bent downwardly from the terminal portion and spread apart at an angle to each other.
'7. A one piece multiple finger electrical contact comprising a metal blank having a terminal portion and a finger portion, the finger portion being divided longitudinally into a plurality of substantially parallel contact fingers, the contact fingers being bent downwardly from the terminal portion and spread apart at an angle to each other, the grain of the contact fingers having the same relationship to their longitudinal axes as the grain of the terminal portion has to its longitudinal axis.
8. A one piece multiple finger electrical contact comprising a metal blank having a terminal portion and a finger portion, the finger portion being divided longitudinally into a plurality of .contact fingers, said terminal portion having a transverse angular bend, the contact fingers being bent downwardly from the terminal portion and spread apart at an angle to each other, the relationship between transverse angular bend of the terminal portion and the angle that the contact fingers make with each other being such that the sum of the two angles is WILLIAM HUPPERT.
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US2450050A (en) * 1945-09-28 1948-09-28 Aircraft Marine Prod Inc Electrical connector
US2488976A (en) * 1944-12-14 1949-11-22 Huppert William Electrical connector
US3974471A (en) * 1975-07-30 1976-08-10 Illinois Tool Works Inc. Brush contact
US4830626A (en) * 1988-07-27 1989-05-16 Liu Tzu Chen Christmas-tree securable extension cord
US7402064B2 (en) 2003-12-31 2008-07-22 Fci Americas Technology, Inc. Electrical power contacts and connectors comprising same
US7425145B2 (en) 2006-05-26 2008-09-16 Fci Americas Technology, Inc. Connectors and contacts for transmitting electrical power
US7458839B2 (en) 2006-02-21 2008-12-02 Fci Americas Technology, Inc. Electrical connectors having power contacts with alignment and/or restraining features
US7476108B2 (en) 2004-12-22 2009-01-13 Fci Americas Technology, Inc. Electrical power connectors with cooling features
US7541135B2 (en) 2005-04-05 2009-06-02 Fci Americas Technology, Inc. Power contact having conductive plates with curved portions contact beams and board tails
US7641500B2 (en) 2007-04-04 2010-01-05 Fci Americas Technology, Inc. Power cable connector system
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US2488976A (en) * 1944-12-14 1949-11-22 Huppert William Electrical connector
US2450050A (en) * 1945-09-28 1948-09-28 Aircraft Marine Prod Inc Electrical connector
US3974471A (en) * 1975-07-30 1976-08-10 Illinois Tool Works Inc. Brush contact
US4830626A (en) * 1988-07-27 1989-05-16 Liu Tzu Chen Christmas-tree securable extension cord
US7690937B2 (en) 2003-12-31 2010-04-06 Fci Americas Technology, Inc. Electrical power contacts and connectors comprising same
US7402064B2 (en) 2003-12-31 2008-07-22 Fci Americas Technology, Inc. Electrical power contacts and connectors comprising same
US8187017B2 (en) 2003-12-31 2012-05-29 Fci Americas Technology Llc Electrical power contacts and connectors comprising same
US7452249B2 (en) * 2003-12-31 2008-11-18 Fci Americas Technology, Inc. Electrical power contacts and connectors comprising same
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US7775822B2 (en) 2003-12-31 2010-08-17 Fci Americas Technology, Inc. Electrical connectors having power contacts with alignment/or restraining features
US7476108B2 (en) 2004-12-22 2009-01-13 Fci Americas Technology, Inc. Electrical power connectors with cooling features
US7749009B2 (en) 2005-01-31 2010-07-06 Fci Americas Technology, Inc. Surface-mount connector
US7541135B2 (en) 2005-04-05 2009-06-02 Fci Americas Technology, Inc. Power contact having conductive plates with curved portions contact beams and board tails
US7458839B2 (en) 2006-02-21 2008-12-02 Fci Americas Technology, Inc. Electrical connectors having power contacts with alignment and/or restraining features
US7425145B2 (en) 2006-05-26 2008-09-16 Fci Americas Technology, Inc. Connectors and contacts for transmitting electrical power
US7726982B2 (en) 2006-06-15 2010-06-01 Fci Americas Technology, Inc. Electrical connectors with air-circulation features
US7641500B2 (en) 2007-04-04 2010-01-05 Fci Americas Technology, Inc. Power cable connector system
US7905731B2 (en) 2007-05-21 2011-03-15 Fci Americas Technology, Inc. Electrical connector with stress-distribution features
US7762857B2 (en) 2007-10-01 2010-07-27 Fci Americas Technology, Inc. Power connectors with contact-retention features
US8062051B2 (en) 2008-07-29 2011-11-22 Fci Americas Technology Llc Electrical communication system having latching and strain relief features
USD651981S1 (en) 2009-01-16 2012-01-10 Fci Americas Technology Llc Vertical electrical connector
USD610548S1 (en) 2009-01-16 2010-02-23 Fci Americas Technology, Inc. Right-angle electrical connector
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