US2780791A - Wire connector with dovetailed casing - Google Patents

Wire connector with dovetailed casing Download PDF

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Publication number
US2780791A
US2780791A US33760553A US2780791A US 2780791 A US2780791 A US 2780791A US 33760553 A US33760553 A US 33760553A US 2780791 A US2780791 A US 2780791A
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Prior art keywords
casing
member
closure
side
open
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Expired - Lifetime
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Morschel Franz
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Morschel Franz
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    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01RLINE CONNECTORS; CURRENT COLLECTORS
    • H01R9/00Connectors and connecting arrangements providing a plurality of mutually insulated connections; Terminals or binding posts mounted upon a base or in a case; Terminal strips; Terminal blocks
    • H01R9/22Bases, e.g. strip, block, panel
    • H01R9/24Terminal blocks
    • H01R9/26Clip-on terminal blocks for side-by-side rail- or strip-mounting

Description

Feb. 5, 1957 i F. MORSCHEL 2,780,791

WIRE CONNECTOR WITH DOVETAILED CASING Filed Feb. 18, 1953 Fig.1, 6 W162. Fig 5, 11 m 19 my 3 llll WEE CONNECTOR WITH DOVETAILED CASING Franz Morschel, Eupen, Belgium Application February 18, 1953, Serial No. 337,605

Claims priority, application France March 4, 1952 4 Claims. (Cl. 339-198) My invention relates to improvements in wire connectors, such as are more particularly suitable for use as terminal or connecting members for electric wires and/or as coupling members subjected to tensile stress, the said wire connectors being intended for both industrial and domestic applications. More specifically, the invention relates to screwless wire connectors, the casing of which has arranged therein one or more pressure and clamping springs acting in the manner of locking pawls and backed against bearing surfaces of the casing, in such a way that the article or articles to be clamped may he slipped between the locking edges of the springs and the said bearing surfaces, the said articles being thereupon held automatically in position, the said casing having conveniently mounted therein releasing members accessible from the outside for acting upon the said clamping edges in View of releasing the said articles.

According to the invention, the casing of the wire connector has an open side parallel to the direction along which the wires or other articles are inserted, so as to form a hollow structure having its free edges formed with notches of dovetail shape for cooperation with a closure member provided with projections of corresponding shape, the proper elasticity of at least one of the two complementary members of each cooperating set of dovetailed notch and projection being suificient to provide for an interfitting grip by merely applying pressure.

According to a further feature of the invention, the solid rear wall of the casing, which is located opposite the open side of the latter, is formed on its outer face with dovetail-shaped projections whereby the casing may be interfitted with an adjacent casing so as to act as a closure member for the latter, thus making it possible to assemble expediently any desired number of casings, without the use of tools, to form a wire connector block, with only one end casing of the block requiring to be closed by a special closure member.

Further particulars and advantages of the invention will appear from the disclosure of a wire connector or electric terminal according to the invention, which will be given hereinafter with reference to the accompanying drawings, in which:

Fig. l is a side elevation, partly in section, of the casing of a wire connector according to the invention, when looking towards the open side of the casing.

Fig. 2 is an end view of the casing.

Fig. 3 is an end view of a closure member.

Fig. 4 is a side view of the closure member according to Fig. 3, which forms the integral rear wall of the casing according to Fig. 2.

Fig. is a perspective view of a wire connector block or board according to the invention.

Fig. 6 is a partial outside view of an alternative form of wire connector according to the invention.

Fig. 7 is a sectional view along line VII-VII of Fig. 6.

In the drawings, the reference 1 indicates a casing made e. g. from Bakelite or any other moulded material, said casing enclosing a central cavity 2 in which there is atted States Patent 0 i 2,780,79 l l atented Feb. s, 1957 ranged a spring 3 made in the shape of a strip having bent-over end portions, the outer or back face of the strip resting upon the bottom wall of the cavity 2, while it end portions bear against a contact bar 4 held against the opposite or top wall of the cavity. The stripped end 5 of an electric wire 6 is inserted through one of the re cesses 7 provided in the casing, so that the wire will be automatically clamped and locked between the corresponding end of the spring 3 and the bar 4. For cooperation with each end of the spring 3 there is provided a push member 8 in a corresponding recess 9 in the casing. Each push member is made with a forked end portion 10 which straddles the bar 4 and is able to act upon the corresponding end at the spring 3 to disengage the said end from the wire 5 and free the latter when the push member is being thrust into the casing. The escape of the push member is prevented by an arresting catch 11.

Two dovetail-shaped recesses 12 are formed in two opposed side walls of the casing l. for cooperation with corresponding tongues 13 provided on a special closure member 14 and on the rear wall of the casing 1. To close a casing, all that need be done is to press the closure member 14 or the rear wall of another casing 1 against the first said casing 1, the interfitting of the closure member and the casing being made possible by the proper elasticity of the material of the casing and/ or the closure member. It will be seen, moreover, that the obliquity of the walls of the notches 12 and the tongues 13 may be very small. The notches 12 are in open communication with the recesses 7, which makes the unit an easy manufactoring item.

In order to prevent the closure member of the casing from coming off by slipping, the closure member is provided with a projection 15 which fits into a hollow 16 provided in the casing. In addition, a narrow elongated projection 17 on the closure member is adapted to come into position against the contact bar 4 so as to hold the latter securely in place.

Moreover, owing to the particular construction of the casing according to the invention, such casing may have easily fitted thereto an identification member, e. g. a small plate 18 bearing a number or another mark and which may be slipped under a transparent sheet 19 fitted into a. shallow recess of dovetail shaped cross section formed in the upper face of the casing.

Fig. 5 shows a block formed of a number of casings 1 assembled with each other, the outermost casing being closed by a closure member 14. The outer end faces of the block thus formed may have secured thereto, as by interfitting, two angle members 20, one flange of each angle member being provided with openings engageable on the projections 13 and with one opening into which the projections 15 and 17 may extend. The other flange of the angle member provides a means whereby the block may be secured, through the medium of screws or bolts 21, to a support 22 provided with openings or slots 23.

Fig. 6 is a partial outside view of a casing provided with a closure member, both being made in accordance with a modified embodiment of the invention. Fig. 7 is a sectional view along line VII-VII of Fig. 6. In the latter modification, slant surfaces 24 and 25 are formed respectively on the casing 1 and on the projection 13 of the closure member 14 (or on the projection of an adjacent casing), so as to form an opening 7 which widens out to the outside, thus making the insertion of a wire or the like more convenient.

It will be understood that the invention is not restricted to the example illustrated, inasmuch as many changes may be made therein without departing from the spirit of the invention. More particularly, the casing according to the invention may be applied to other clamping and disengaging mechanisms for wires, though it is specially 3 useful with mechanisms of the type described and illustrated.

I claim:

1. In a wire connector, the combination of a casing for the connecting mechanism and having an open side, at least one opening in said casing for inserting a wirelike element into said casing in a direction substantially parallel to said open side, a closure member for the open side of said casing, notches of dovetail shape in the free end faces of said casing adjacent to said closure member, projections of corresponding shape on said closure member for cooperating with said notches, the elasticity of at least one of the two complementary members of each cooperating set of dovetailed notch and projection being sufiicient to provide for a snap engagement thereof in response to the application of pressure on said complementary members in the direction normal to said open side of the casing, a cavity formed in a free end face of the casing adjacent the closure member and a projection provided on the latter for engaging said cavity and preventing removal of the closure member by movement of the latter parallel to the plane of said open side of the casing.

2. In a wire connector, the combination according to claim 1, in which the solid rear Wall of the casing, located opposite the open side thereof, is formed with dovetail shaped outer projections capable of being snapped into the notches of an adjacent casing identical with said first mentioned casing, so as to form a closure member for the latter, said rear wall being also formed with a projection for engaging the said cavity formed in the free end face of said adjacent casing.

3. In a wire connector, the combination of a casing for the connecting mechanism and having an open side, at least one opening in said casing for inserting a Wirelike element into said casing in a direction substantially parallel to said open side, a closure member for the open side of said casing, notches of dovetail shape in the free end faces of said casing adjacent to said closure member, each opening for inserting a wirelike element forming a narrowed extension of one of said notches, at the bottom thereof, projections of corresponding shape on said closure member for cooperating with said notches, the elasticity of at least one of the two complementary members of each cooperating set of dovetailed notch and projection being sufficient to provide for a snap engagement thereof in response to the application of pressure on said complementary members in the direction normal to said open side of the casing, a cavity formed in a free end face of the casing adjacent the closure member and a projection provided on the latter for engaging said cavity and preventing removal of the closure member by movement of the latter parallel to the plane of said open side of the casing.

4. In a wire connector, the combination of a casing for the connecting mechanism and having an open side, at least one opening in said casing for inserting a wirelike element into said casing in a direction substantially parallel to said open side, a closure member for the open side of said casing, notches of dovetail shape in the free end faces of said casing adjacent to said closure member, pro jection of corresponding shape on said closure member for cooperating with said notches, the elasticity of at least one of the two complementary members of each cooperating set of dovetailed notch and projection being sufficient to provide for a snap engagement thereof in response to the application of pressure on said complementary members in the direction normal to said open side of the casing, each opening for inserting a wirelike element forming a narrowed extension of one of said notches, at the bottom thereof, a shoulder provided on each dovetailed projection of the closure member for protruding into the corresponding opening, the said shoulder and the opposite wall of said opening having inclined surfaces converging towards the inside of the casing, a cavity formed in a free end face of the casing adjacent the closure member and a projection provided on the latter for engaging said cavity and preventing removal of the closure member by movement of the latter parallel to the plane of said open side of the casing.

References Cited in the file of this patent UNITED STATES PATENTS

US2780791A 1952-03-04 1953-02-18 Wire connector with dovetailed casing Expired - Lifetime US2780791A (en)

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Cited By (45)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2892176A (en) * 1955-03-10 1959-06-23 Gordon James Multiple dovetailed terminal blocks
US2903671A (en) * 1956-11-19 1959-09-08 Royal Mcbee Corp Electrical terminal connector block
US2920163A (en) * 1956-11-13 1960-01-05 William J Johnson Electrical connector for building panels
US2922139A (en) * 1954-09-29 1960-01-19 Buchanan Electrical Prod Corp Interlocking electrical terminal block
US2954544A (en) * 1957-07-22 1960-09-27 Joseph W Focosi Electrical plug connectors
US2957155A (en) * 1956-06-14 1960-10-18 Nuclear Res Associates Inc Adjustable connector for printed circuit boards and the like
US2972675A (en) * 1956-09-10 1961-02-21 Miller Co Fluorescent lighting fixture and socket assembly therefor
US2981922A (en) * 1956-05-16 1961-04-25 Square D Co Electric terminal strip
US3008113A (en) * 1958-07-30 1961-11-07 Ibm Electrical interconnecting and mounting device for printed-circuit boards
US3019408A (en) * 1958-04-22 1962-01-30 Buchanan Electrical Prod Corp Electric terminal block assembly of the stud type
US3042895A (en) * 1959-03-28 1962-07-03 Curtiss Wright Corp Interlocked electrical connectors
US3054979A (en) * 1958-12-03 1962-09-18 Amp Inc Multiple electrical connector
US3060399A (en) * 1959-10-27 1962-10-23 Gen Electric Wiring device terminal connecting means
US3087984A (en) * 1957-08-19 1963-04-30 Waranch Myer Wiring ficture and forming board
US3111354A (en) * 1960-08-12 1963-11-19 Gen Electric Circuit breaker panel assembly
US3123425A (en) * 1957-12-11 1964-03-03 Blanchet
US3133999A (en) * 1960-10-14 1964-05-19 Square D Co Electric circuit breaker having two operating mechanisms arranged in tandem relationship and having quickconnect plug-in type load terminals
US3138421A (en) * 1961-07-31 1964-06-23 Zinsco Electrical Products Terminal for circuit breaker switch or the like
US3152851A (en) * 1963-04-12 1964-10-13 Westinghouse Electric Corp Wiring device and wire release arrangement therefor
US3173738A (en) * 1961-12-18 1965-03-16 Amp Inc Terminal block construction
US3193226A (en) * 1961-09-20 1965-07-06 Lyall Electric Snap-in fastener for mounting opening
US3215973A (en) * 1963-03-28 1965-11-02 David G Falconer Electrical connector block
US3244848A (en) * 1959-05-27 1966-04-05 Controls Co Of America Ganging means for switch bodies
US3253252A (en) * 1963-06-17 1966-05-24 Buchanan Electrical Prod Corp Sectional electrical terminal block
US3255428A (en) * 1964-11-16 1966-06-07 Cutler Hammer Inc Electrical connectors
DE1269264B (en) * 1962-03-20 1968-05-30 Delta Welder Corp Electrode holder for cylindrical spot welding electrodes
US3437983A (en) * 1966-05-20 1969-04-08 Amp Inc Electrical connector assembly and mounting means therefor
US3496521A (en) * 1967-05-29 1970-02-17 Wago Kontakttechnik Gmbh Safety contact terminal for electric wires
US3538489A (en) * 1968-11-19 1970-11-03 Amp Inc Connector block
US3569911A (en) * 1968-10-25 1971-03-09 Raymond Bogdanowicz Terminal box
US3633148A (en) * 1968-06-25 1972-01-04 Thorsman & Co Ab Current-transmitting coupling between electric lines
US3652977A (en) * 1970-05-28 1972-03-28 Burndy Corp Electrical junction assembly
US3867004A (en) * 1972-12-21 1975-02-18 Itt Electrical connection device
US3873174A (en) * 1973-03-30 1975-03-25 Molex Inc Antenna board assembly with wire receptacle and switch
US3873177A (en) * 1972-03-30 1975-03-25 Electronic Eng Co Junction box connector assembly
US3977751A (en) * 1974-12-20 1976-08-31 Lucerne Products, Inc. Release mechanism for plug in-type terminals
US3993395A (en) * 1975-01-06 1976-11-23 Taylor Industries, Inc. Modular snap-together fuse block assembly
JPS52163793U (en) * 1976-06-04 1977-12-12
US4070086A (en) * 1974-01-23 1978-01-24 General Signal Corporation Variable length electrical connector
US4354722A (en) * 1979-06-05 1982-10-19 Itw De France Terminal connector device for electrical conducting wires
US4921439A (en) * 1988-10-27 1990-05-01 Amp Incorporated Center wire trap terminal and connector
US4936789A (en) * 1989-08-01 1990-06-26 Joseph Ugalde Method and apparatus for preventing the theft of a fluorescent lamp and ballast transformer
WO1990012431A1 (en) * 1989-04-04 1990-10-18 Solatrol, Inc. Electrical splice assembly
US5127846A (en) * 1990-06-13 1992-07-07 Wago Verwaltungsgesellschaft Mbh Terminal block for electrical conductors
US5865646A (en) * 1997-03-07 1999-02-02 Berg Technology, Inc. Connector shield with integral latching and ground structure

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1629267A (en) * 1923-11-28 1927-05-17 Roach Appleton Mfg Company Outlet-box connection
FR670944A (en) * 1928-07-06 1929-12-06 Cie Generale Entpr Elec Improvement in terminal blocks and carrier plates son
US1981460A (en) * 1929-08-07 1934-11-20 James B Miller Cable connecter
GB466821A (en) * 1935-12-14 1937-06-07 Fritz Siegfried Loebl Improvements in electric connectors and terminals for electric leads
FR872768A (en) * 1940-05-30 1942-06-18 Licentia Gmbh Serial terminal for electric lines
DE856012C (en) * 1950-07-16 1952-11-17 Paul Wagner Screwless connecting terminal
US2699533A (en) * 1951-02-26 1955-01-11 Devere Company Plural-circuit connector

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1629267A (en) * 1923-11-28 1927-05-17 Roach Appleton Mfg Company Outlet-box connection
FR670944A (en) * 1928-07-06 1929-12-06 Cie Generale Entpr Elec Improvement in terminal blocks and carrier plates son
US1981460A (en) * 1929-08-07 1934-11-20 James B Miller Cable connecter
GB466821A (en) * 1935-12-14 1937-06-07 Fritz Siegfried Loebl Improvements in electric connectors and terminals for electric leads
FR872768A (en) * 1940-05-30 1942-06-18 Licentia Gmbh Serial terminal for electric lines
DE856012C (en) * 1950-07-16 1952-11-17 Paul Wagner Screwless connecting terminal
US2699533A (en) * 1951-02-26 1955-01-11 Devere Company Plural-circuit connector

Cited By (47)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2922139A (en) * 1954-09-29 1960-01-19 Buchanan Electrical Prod Corp Interlocking electrical terminal block
US2892176A (en) * 1955-03-10 1959-06-23 Gordon James Multiple dovetailed terminal blocks
US2981922A (en) * 1956-05-16 1961-04-25 Square D Co Electric terminal strip
US2957155A (en) * 1956-06-14 1960-10-18 Nuclear Res Associates Inc Adjustable connector for printed circuit boards and the like
US2972675A (en) * 1956-09-10 1961-02-21 Miller Co Fluorescent lighting fixture and socket assembly therefor
US2920163A (en) * 1956-11-13 1960-01-05 William J Johnson Electrical connector for building panels
US2903671A (en) * 1956-11-19 1959-09-08 Royal Mcbee Corp Electrical terminal connector block
US2954544A (en) * 1957-07-22 1960-09-27 Joseph W Focosi Electrical plug connectors
US3087984A (en) * 1957-08-19 1963-04-30 Waranch Myer Wiring ficture and forming board
US3123425A (en) * 1957-12-11 1964-03-03 Blanchet
US3019408A (en) * 1958-04-22 1962-01-30 Buchanan Electrical Prod Corp Electric terminal block assembly of the stud type
US3008113A (en) * 1958-07-30 1961-11-07 Ibm Electrical interconnecting and mounting device for printed-circuit boards
US3054979A (en) * 1958-12-03 1962-09-18 Amp Inc Multiple electrical connector
US3042895A (en) * 1959-03-28 1962-07-03 Curtiss Wright Corp Interlocked electrical connectors
US3244848A (en) * 1959-05-27 1966-04-05 Controls Co Of America Ganging means for switch bodies
US3060399A (en) * 1959-10-27 1962-10-23 Gen Electric Wiring device terminal connecting means
US3111354A (en) * 1960-08-12 1963-11-19 Gen Electric Circuit breaker panel assembly
US3133999A (en) * 1960-10-14 1964-05-19 Square D Co Electric circuit breaker having two operating mechanisms arranged in tandem relationship and having quickconnect plug-in type load terminals
US3138421A (en) * 1961-07-31 1964-06-23 Zinsco Electrical Products Terminal for circuit breaker switch or the like
US3193226A (en) * 1961-09-20 1965-07-06 Lyall Electric Snap-in fastener for mounting opening
US3173738A (en) * 1961-12-18 1965-03-16 Amp Inc Terminal block construction
DE1269264B (en) * 1962-03-20 1968-05-30 Delta Welder Corp Electrode holder for cylindrical spot welding electrodes
US3215973A (en) * 1963-03-28 1965-11-02 David G Falconer Electrical connector block
US3152851A (en) * 1963-04-12 1964-10-13 Westinghouse Electric Corp Wiring device and wire release arrangement therefor
US3253252A (en) * 1963-06-17 1966-05-24 Buchanan Electrical Prod Corp Sectional electrical terminal block
US3255428A (en) * 1964-11-16 1966-06-07 Cutler Hammer Inc Electrical connectors
US3437983A (en) * 1966-05-20 1969-04-08 Amp Inc Electrical connector assembly and mounting means therefor
US3496521A (en) * 1967-05-29 1970-02-17 Wago Kontakttechnik Gmbh Safety contact terminal for electric wires
US3633148A (en) * 1968-06-25 1972-01-04 Thorsman & Co Ab Current-transmitting coupling between electric lines
US3569911A (en) * 1968-10-25 1971-03-09 Raymond Bogdanowicz Terminal box
US3538489A (en) * 1968-11-19 1970-11-03 Amp Inc Connector block
US3652977A (en) * 1970-05-28 1972-03-28 Burndy Corp Electrical junction assembly
US3873177A (en) * 1972-03-30 1975-03-25 Electronic Eng Co Junction box connector assembly
US3867004A (en) * 1972-12-21 1975-02-18 Itt Electrical connection device
US3873174A (en) * 1973-03-30 1975-03-25 Molex Inc Antenna board assembly with wire receptacle and switch
US4070086A (en) * 1974-01-23 1978-01-24 General Signal Corporation Variable length electrical connector
US3977751A (en) * 1974-12-20 1976-08-31 Lucerne Products, Inc. Release mechanism for plug in-type terminals
US3993395A (en) * 1975-01-06 1976-11-23 Taylor Industries, Inc. Modular snap-together fuse block assembly
JPS52163793U (en) * 1976-06-04 1977-12-12
JPS5543673Y2 (en) * 1976-06-04 1980-10-14
US4354722A (en) * 1979-06-05 1982-10-19 Itw De France Terminal connector device for electrical conducting wires
US4921439A (en) * 1988-10-27 1990-05-01 Amp Incorporated Center wire trap terminal and connector
WO1990012431A1 (en) * 1989-04-04 1990-10-18 Solatrol, Inc. Electrical splice assembly
US4973263A (en) * 1989-04-04 1990-11-27 Solatrol, Inc. Electrical splice assembly
US4936789A (en) * 1989-08-01 1990-06-26 Joseph Ugalde Method and apparatus for preventing the theft of a fluorescent lamp and ballast transformer
US5127846A (en) * 1990-06-13 1992-07-07 Wago Verwaltungsgesellschaft Mbh Terminal block for electrical conductors
US5865646A (en) * 1997-03-07 1999-02-02 Berg Technology, Inc. Connector shield with integral latching and ground structure

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