US1208217A - Spring fastening device. - Google Patents

Spring fastening device. Download PDF

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Publication number
US1208217A
US1208217A US75412813A US1913754128A US1208217A US 1208217 A US1208217 A US 1208217A US 75412813 A US75412813 A US 75412813A US 1913754128 A US1913754128 A US 1913754128A US 1208217 A US1208217 A US 1208217A
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United States
Prior art keywords
wire
fastening device
spring
conductor
resistant
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Expired - Lifetime
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US75412813A
Inventor
John Schade Jr
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FAHNESTOCK ELECTRIC Co
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FAHNESTOCK ELECTRIC Co
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Publication date
Application filed by FAHNESTOCK ELECTRIC Co filed Critical FAHNESTOCK ELECTRIC Co
Priority to US75412813A priority Critical patent/US1208217A/en
Priority to US878653A priority patent/US1212821A/en
Application granted granted Critical
Publication of US1208217A publication Critical patent/US1208217A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/28Clamped connections, spring connections
    • H01R4/48Clamped connections, spring connections utilising a spring, clip, or other resilient member
    • H01R4/4809Clamped connections, spring connections utilising a spring, clip, or other resilient member using a leaf spring to bias the conductor toward the busbar
    • H01R4/48455Clamped connections, spring connections utilising a spring, clip, or other resilient member using a leaf spring to bias the conductor toward the busbar insertion of a wire only possible by pressing on the spring

Definitions

  • This invention relates to spring terminal clips or fastening devices for the terminals of electrical conductors, and the objects of the invention are to enable the conductor to be firmly gripped and clamped in defined position, permit the ready insertion and removal of the conductor, and insure good electrical contact at all times between the conductor and the fastening device.
  • FIG. 1 is a perspective view of a fastening device embodying the invention and provided with a hooked resistant member
  • Fig. 2 is a perspective view of a double form of theinaention
  • Fig. 3 is a perspective view of a device like Fig. 1, but requiring but one screw or other device to secure it to the base
  • Fig. 4 is a perspective view of one half of the double fastening device shown in Fig.
  • Fig. 5 is a perspective view of a device like Fig. 4, constructed out of wire having an angular cross section as for instance rectangular wire;
  • Fig. 6 is a modification of Fig. 4;
  • Fig. 7 is a modification of the spring fastening device, in which the spring member passes between the portions which form the resistant member;
  • Fig. 8 is a detail side view of'the metal at one of the bends of my improved fastening device;
  • Fig. 9 is an inside plan view of the metal at the bend showing the flattening of the wire.
  • My improved fastening device is prefer ably made from asingle piece of resilient material, as for instance metallic wire, although I am not to be understood as limiting the invention to this particular form of material, for other forms of resilient metal may be found suitable for carrying out the invention.
  • the device may be made out of a single piece of material, or it may be made out of several pieces if desired, and I am not to be understood, as limiting the invention to a fastening device comprised of a single piece of wire.
  • the fastening device comprises broadly two opposing normally separated members, and a retaining resistant portion of suitable shape projecting toward the opposite mem her and adapted to co-act therewith to firmly clamp a conductor in defined position when said members are forced into operative relationship.
  • the piece of wire In order to construct two opposing normally separated members, the piece of wire, if the device is made from one piece, is bent upon itself to bring one member opposite the other and the two legs may be termed the body member. Both of these legs A are adapted to be secured to a base or support I in any suitable manner as by means of 'the screws J passing through holes provided therefor by bends of the wire.
  • Fig. 1 the construction is such that two screws .l are adapted to be used, while in Fig. 3 the construction is such that but one screw is necessary.
  • the body member is thus lixed stationary upon thcbase or support I, while the opposing member com prising the legs B is adapted to be forced out of its normal position toward the body member, from which it tends to separate under the retractive force of the spring. thus enabling a conductor K to be firmly gripped and clamped in defined position between the spring member B and the stationary resistant or retaining.portion'comprising the hooked shaped members (3' shown in Figs. 1 and 3 as extending upwardly from the legs A. comprising the body member.
  • the retaining portion Cof the body members forms a stationary resistant member
  • I mean by a V-shaped portion,a part having diverging sides and having the general conformation of a V'so that a conductor of suitable size when inserted in the angle of the V' will make contact at at least two tangential points in the-V
  • the wire as shown is looped on itself to form a spring at D and one-end E: of the spring member is bent in the reverse direction to the loop D toform with the bend of the loop an angular retaining portion.
  • round wire is used to make the fastening device,
  • Fig. 5 the fastening device formed of wire having rectangular cross section is shown, in this instance the wire being substantially square in'cross section.
  • the angles at the bends of the retaining portions for the wire are less than a right angle or approach as nearly as possible to an acute angle, and this acute angleform of the retaining portions may be obtained by flattening the wire as indicated in Figs. Sand 9, thus making the angles in which the wire is gripped substantially acuteangles.
  • the other conducting wire L which completes the circuit may be-suitably secured in electrical contact with the screw J as by means ofthe binding nuts 0.
  • the apexof the. angle of the resistant member or members C projects upwardly from the body member. A toward the spring member and is adapted to co-act with said spring member to clamp a conductor in defined position therein when said members are' .forced into operative relationship.-
  • a double or compound form of the devic is shown, in which the body memher A is not provided with a separate resistant member C, but the body member itself is meager? bent upwardly to form the resistant member or members t" formed out of the length of the legs A.
  • These angular resistant members project upwardly toward the spring member B and are adapted to hold and clamp a conductor as in Fig. .l.
  • the single piece of wire is so bent and twisted together that fastening devices are provided opposite each other at each end of the body member A, while said body member formed of twisted wire is provided with loops A and adapted to lie upon and be secured to the base I as by means of the screws J.
  • One of these screws is preferably provided with binding nuts 0 to enable the conducting wire L to be attached thereto and complete the circuit.
  • FIG. 4 one half only of the double device shown in Fig. 2 is illustrated, and in this form the ends of the legs A are bent around to form loops H, through which the screw J may pass.
  • Fig. 6 a modification of the device is shown in which both legs A of the body member are bent at an angle to the general direction of the body member and adapted to be secured to the side of any support desired. If desired, the ends of the le s A may be bent around into the form of oops H .in order to enable the device to besecured to the support.
  • a fastening device for electrical conductors formed of bent spring Wire provided with retaining portions, and having fiat contact surfaces inside the bends of said retaining portions for the conductor.
  • a fastening device for electrical conductors comprising a piece of resilient metallic Wire, having a body member, a spring member and a resistant member, said spring member and resistant member being bent to form retaining portions for the conductor, and the Wire being flattened at the inside surface of said bends forming contact portions for the conductor.
  • a fastening device for electrical conductors comprising a piece of resilient metallic wire, having a body member, a spring member and a resistant member, said spring member and resistant member being bent to form retaining portions for the conductor, the wire having flat contact surfaces inside the bends of the said retaining portions.

Description

I J. SCHADE, JR.
SPRING FASTENING DEVICE. APPLICATION FILED DEC.!3,1906- RENEWED MAR. 13.1913.
Patented Dec. 12, 1916.
In vemor:
JOHN SCI-IADE, JR., OF NEW YORK, N. 51., ASSIGNOR. T0 FAHNESTOCK ELECTRIC COMPANY, A. CORPORATION OF WEST VIRGINIA.
SPRING FASTENING DEVICE.
Patented Dec. 12, ffiiilti.
Application filed December 13, 1906, Serial No. 347,577. Renewed March 13, 1913. Serial No. 754,128.-
T 0 all whom it may concern:
Be it known that 1, JOHN Sermon, J r., a
citizen of the United States, and resident of the borough of Brooklyn, county of Kings, city and State of New York, have invented certain new and useful Improvements in Spring Fastening Devices, of which the following is a specification, accompanied by drawings.
This invention relates to spring terminal clips or fastening devices for the terminals of electrical conductors, and the objects of the invention are to enable the conductor to be firmly gripped and clamped in defined position, permit the ready insertion and removal of the conductor, and insure good electrical contact at all times between the conductor and the fastening device.
llhis application is a continuation in part of my copending application No. 257,9 18, filed April 28, 1905, which application resulted in U. S. Patent Reissue No. 12,642,
granted April 23, 1907.
Further objects of the invention will hereinafter appear, and to these ends the invention consists of a fastening device for carrying out the above objects embodying the features of construction, combinations of elements and arrangement of parts having the general mode of operation substantially as hereinafter fully described and claimed in this specification; and shown in the accompanying drawings, in which- Figure 1 is a perspective view of a fastening device embodying the invention and provided with a hooked resistant member; Fig. 2 is a perspective view of a double form of theinaention; Fig. 3 is a perspective view of a device like Fig. 1, but requiring but one screw or other device to secure it to the base; Fig. 4 is a perspective view of one half of the double fastening device shown in Fig. 2 and requiring but one screw or other device to secure it to the base; Fig. 5 is a perspective view of a device like Fig. 4, constructed out of wire having an angular cross section as for instance rectangular wire; Fig. 6 is a modification of Fig. 4; Fig. 7 is a modification of the spring fastening device, in which the spring member passes between the portions which form the resistant member; Fig. 8 is a detail side view of'the metal at one of the bends of my improved fastening device; Fig. 9 is an inside plan view of the metal at the bend showing the flattening of the wire. l
My improved fastening device is prefer ably made from asingle piece of resilient material, as for instance metallic wire, although I am not to be understood as limiting the invention to this particular form of material, for other forms of resilient metal may be found suitable for carrying out the invention. Obviously the device may be made out of a single piece of material, or it may be made out of several pieces if desired, and I am not to be understood, as limiting the invention to a fastening device comprised of a single piece of wire.
The fastening device comprises broadly two opposing normally separated members, and a retaining resistant portion of suitable shape projecting toward the opposite mem her and adapted to co-act therewith to firmly clamp a conductor in defined position when said members are forced into operative relationship.
In order to construct two opposing normally separated members, the piece of wire, if the device is made from one piece, is bent upon itself to bring one member opposite the other and the two legs may be termed the body member. Both of these legs A are adapted to be secured to a base or support I in any suitable manner as by means of 'the screws J passing through holes provided therefor by bends of the wire.
In Fig. 1. the construction is such that two screws .l are adapted to be used, while in Fig. 3 the construction is such that but one screw is necessary. The body member is thus lixed stationary upon thcbase or support I, while the opposing member com prising the legs B is adapted to be forced out of its normal position toward the body member, from which it tends to separate under the retractive force of the spring. thus enabling a conductor K to be firmly gripped and clamped in defined position between the spring member B and the stationary resistant or retaining.portion'comprising the hooked shaped members (3' shown in Figs. 1 and 3 as extending upwardly from the legs A. comprising the body member. The retaining portion Cof the body members forms a stationary resistant member,
and these hooks are so constructed and shaped that a conductor is held therein and firmly gripped in defined position in such manner that it cannot be easily withdrawn in a transverse direction while under the influence of the pressure of the spring. Furthermore the hooked ends of the resistant members C are so shaped 'as to provide a good electrical contact for. the conductor. I have found that a substantially V-shaped retaining portion C, forming the resistant member fulfils the object sought when combined with the other cooperating elements of my improved fastening device. I mean by a V-shaped portion,a part having diverging sides and having the general conformation of a V'so that a conductor of suitable size when inserted in the angle of the V' will make contact at at least two tangential points in the-V The wire, as shown is looped on itself to form a spring at D and one-end E: of the spring member is bent in the reverse direction to the loop D toform with the bend of the loop an angular retaining portion. Preferably, if round wire is used to make the fastening device,
it'should be flattened on the inside surface of the bends which form the retaining portions of the wire, thereby increasing the area of contact between the fastening device and the electric conductor. In Figs. 8 and 9 this flattening of the wire is illustrzited, showing-that theinterior surface F of the bend is flattened, while the exterior surface G is rounded.
In Fig. 5 the fastening device formed of wire having rectangular cross section is shown, in this instance the wire being substantially square in'cross section. By this means the object of increasing the area of contact is accomplished Without previously flattening the wire. since said wire has fiat I surfaces already. .Preferably, the angles at the bends of the retaining portions for the wire are less than a right angle or approach as nearly as possible to an acute angle, and this acute angleform of the retaining portions may be obtained by flattening the wire as indicated in Figs. Sand 9, thus making the angles in which the wire is gripped substantially acuteangles. The other conducting wire L, which completes the circuit may be-suitably secured in electrical contact with the screw J as by means ofthe binding nuts 0. e As shown, the apexof the. angle of the resistant member or members C projects upwardly from the body member. A toward the spring member and is adapted to co-act with said spring member to clamp a conductor in defined position therein when said members are' .forced into operative relationship.-
In Fig 2, a double or compound form of the devic is shown, in which the body memher A is not provided with a separate resistant member C, but the body member itself is meager? bent upwardly to form the resistant member or members t" formed out of the length of the legs A. These angular resistant members project upwardly toward the spring member B and are adapted to hold and clamp a conductor as in Fig. .l. The single piece of wire is so bent and twisted together that fastening devices are provided opposite each other at each end of the body member A, while said body member formed of twisted wire is provided with loops A and adapted to lie upon and be secured to the base I as by means of the screws J. One of these screws is preferably provided with binding nuts 0 to enable the conducting wire L to be attached thereto and complete the circuit.
In Fig. 4, one half only of the double device shown in Fig. 2 is illustrated, and in this form the ends of the legs A are bent around to form loops H, through which the screw J may pass.
In Fig. 6 a modification of the device is shown in which both legs A of the body member are bent at an angle to the general direction of the body member and adapted to be secured to the side of any support desired. If desired, the ends of the le s A may be bent around into the form of oops H .in order to enable the device to besecured to the support.
In Fig. 7 the spring member 13, as shown, passes between the resistant members C instead of inclosing them as in the other figures.
I do" not herein claim the combination of a dry. battery and a spring fastening device having a portion of the body member-bent to form an attaching leg, as this invention was made the subject matter of a separate application, Ser. No. 576,872, filed August 12, 1910, which application resulted in United States Patent No. 985,288, granted January 27, 1911. Nor do I herein specifically claim a fastening device for electrical conductors formed of bent sprin wire and having at its securing end rings orming an eye, as this invention was made the subject matter of a separate application, Ser. No. 680,498, filed February 28, 1912, which application resulted in United States Patent' No. 1,047,897, granted December 17, 1912. Furthermore, I do not herein claim that form of spring clip provided with a broadened foot, in which form there is a body member and a spring member, one of which is provided with an angular resistant portion, as that form of the invention has een made the subject matter of a separate application. Nor do I herein claim any form of spring fastening device having in combination attaching means and conductor engaging means, because such subject matter has been claimed in a separate application.
moaar? I claim and desire to obtain by Letters Patent the following:
1. A fastening device for electrical conductors, formed of bent spring Wire provided with retaining portions, and having fiat contact surfaces inside the bends of said retaining portions for the conductor.
2. A fastening device for electrical conductors comprising a piece of resilient metallic Wire, having a body member, a spring member and a resistant member, said spring member and resistant member being bent to form retaining portions for the conductor, and the Wire being flattened at the inside surface of said bends forming contact portions for the conductor.
3. A fastening device for electrical conductors comprising a piece of resilient metallic wire, having a body member, a spring member and a resistant member, said spring member and resistant member being bent to form retaining portions for the conductor, the wire having flat contact surfaces inside the bends of the said retaining portions.
In testimony whereof I have signed this specification in the presence of two subscribing witnesses.
JOHN SCHADE, JR.
' Vitnesses:
CHARLES D. BRANDT, ERNEST B. FAHNEsTocK.
US75412813A 1913-03-13 1913-03-13 Spring fastening device. Expired - Lifetime US1208217A (en)

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US878653A US1212821A (en) 1913-03-13 1914-12-23 Spring fastening device.

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2461616A (en) * 1945-03-29 1949-02-15 Western Electric Co Contact fixture
US2517848A (en) * 1946-09-07 1950-08-08 Cinch Mfg Corp Electrical wiring terminal installation
US4639060A (en) * 1983-05-20 1987-01-27 Raychem Corporation Heat recoverable connector
US5432690A (en) * 1992-12-21 1995-07-11 U.S. Philips Corporation Luminaire

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2461616A (en) * 1945-03-29 1949-02-15 Western Electric Co Contact fixture
US2517848A (en) * 1946-09-07 1950-08-08 Cinch Mfg Corp Electrical wiring terminal installation
US4639060A (en) * 1983-05-20 1987-01-27 Raychem Corporation Heat recoverable connector
US5432690A (en) * 1992-12-21 1995-07-11 U.S. Philips Corporation Luminaire

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