US3143385A - Electrical connecting device - Google Patents

Electrical connecting device Download PDF

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Publication number
US3143385A
US3143385A US194369A US19436962A US3143385A US 3143385 A US3143385 A US 3143385A US 194369 A US194369 A US 194369A US 19436962 A US19436962 A US 19436962A US 3143385 A US3143385 A US 3143385A
Authority
US
United States
Prior art keywords
sleeve
contact
cavity
bosses
retainer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US194369A
Other languages
English (en)
Inventor
Jr John A Zimmerman
Jr Frank B Miller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TE Connectivity Corp
Original Assignee
AMP Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to BE632200D priority Critical patent/BE632200A/xx
Priority to NL135882D priority patent/NL135882C/xx
Application filed by AMP Inc filed Critical AMP Inc
Priority to US194369A priority patent/US3143385A/en
Priority to GB16941/63A priority patent/GB965395A/en
Priority to DEA43053A priority patent/DE1257925B/de
Priority to FR934633A priority patent/FR1360920A/fr
Priority to CH605463A priority patent/CH398730A/fr
Priority to JP2520063A priority patent/JPS397169B1/ja
Application granted granted Critical
Publication of US3143385A publication Critical patent/US3143385A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G7/00—Connections between parts of the scaffold
    • E04G7/02—Connections between parts of the scaffold with separate coupling elements
    • E04G7/06—Stiff scaffolding clamps for connecting scaffold members of common shape
    • E04G7/24—Couplings involving arrangements covered by more than one of the subgroups E04G7/08, E04G7/12, E04G7/20, E04G7/22
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/40—Securing contact members in or to a base or case; Insulating of contact members
    • H01R13/42—Securing in a demountable manner
    • H01R13/426—Securing by a separate resilient retaining piece supported by base or case, e.g. collar or metal contact-retention clip

Definitions

  • This invention relates to electrical connecting devices of the type comprising a contact terminal which is contained Within an insulating housing.
  • a common type of electrical connecting device for disengageably connecting electrical conductors comprises a pair of insulating blocks, each of which has a plurality of contact terminals therein so that when the blocks are engaged with each other the contact terminals of each block are mated with terminals in the other block.
  • One type of contact terminal used in these multi-contact connectors is adapted to be crimped or otherwise secured to the end of a wire and subsequently inserted into a cavity in the insulating block. With this type of contact terminal, it is necessary to provide a means for retaining the terminal in the insulating block after insertion and preventing its accidental or unauthorized removal from the cavity. At the same time, it is advantageous to have the contact terminal removable from the cavity for purposes of replacement, repair, or to permit changes in circuitry.
  • the instant invention relates to these insertable types of electrical contacts which are used in multi-contact connecting devices.
  • a split cylindrical sleeve having a pair of forwardly extending arms on one end.
  • the ends of these arms are enlarged and extend arcuately around the axis of the split sleeve.
  • the lateral edges of the enlarged ends of the arms are inwardly bent towards the sleeve axis to form lips or flanges.
  • the retaining device of the instant invention is intended to be used with an insulating block having a generally cylindrical cavity extending therethrough and in which there are provided a pair of opposed arcuate bosses.
  • the retainer is disposed in the cavity with the edge of the split sleeve disposed against the bosses on one side thereof and with the arms extending between the bosses so that the enlarged ends of the arms extend circumferentially partially around the cavity at the opposite end of the bosses.
  • the inwardly bent lips on the ends of the arms normally project radially inwardly towards the center of the cavity some what beyond the surfaces of the bosses so that when an electrical contact having a circumferential recess therein is positioned in the cavity with the lips or flanges extending into the recess of the contact, the terminal contact can not be withdrawn by virtue of the wedging action of the flanges or lips of the retainer.
  • FIGURE 1 is a perspective View of a type of contact terminal with which the retaining means of the instant invention is adapted to be used.
  • FIGURE 2 is a perspective view of a contact retaining means in accordance with the invention.
  • FIGURE 3 is a sectional side view of the retaining means of FIGURE 2 taken along the lines 33 of FIG- URE 4.
  • FIGURES 4 and 5 are views taken along the lines 4-4 and 5-5 of FIGURE 3.
  • FIGURE 6 is a sectional view showing a portion of a cavity in an insulating block which is adapted to receive the retaining means of FIGURE 2.
  • FIGURES 7 and 8 are views taken along the lines 77 and 38 of FIGURE 6.
  • FIGURE 9 is a view similar to FIGURE 6 but showing the retaining means positioned in the cavity.
  • FIGURE 10 is a view looking into the end of the cavity of FIGURE 9 taken along the lines 1016 of FIG- URE 9.
  • FIGURES 11, 12 and 13 are views illustrating the insertion of the contact of FIGURE 1 into the cavity; these views are not true sections but are taken along the lines 11-11 of FIGURE 10 in the interest of clarity.
  • FIGURE 14 is a view illustrating the manner in which the contact is removed from the cavity in the insulating block.
  • FIGURE 15 is a fragmentary cross sectional view showing a pair of contacts in engagement with each other and showing the retaining means of the instant invention as used with a socket contact; this view is not a true section but is similar to FIGURES 11-13.
  • FIGURE 1 A commonly known type of electrical contact terminal 2 with which the retaining device of the invention is adapted to be used is shown in FIGURE 1 to comprise a hollow cylindrical crimp portion 4, an intermediate collar 6, and a uniform diameter cylindrical section 8 disposed forwardly of collar 6.
  • a conical inwardly tapering surface It) is provided forwardly of the section 8 and this conical section terminates in a relatively sheer rearwardly facing shoulder 12 in front of which there is a further cylindrical section 14 of the same diameter as the cylindrical section 8.
  • a relatively steep conical surface 16 extends from the cylindrical section 14 to the reduced diameter cylindrical pin end section 18 of the contact. This end section is adapted to be received within complementary socket contact described below.
  • the crimp section 4 is axially bored to receive the stripped end of a conductor 22 to which it may be crimped as is shown at 2% in FIGURE 14.
  • the complementary socket contact 24, as shown in FIGURE 15, has an axially bored forward end for engagement with the projecting pin portion 18 of the pin contact 2.
  • the intermediate and rearward portions of the socket contact have substantially the same external configuration as the pin contact 2 and need not be described in further detail.
  • the corresponding portions or parts of tins socket contact are identified by the same reference numerals as are used with respect to the pin contact but differentiated by prime marks.
  • Contacts of the type shown at 2 and 24 are adapted to be crimped onto the ends of conductors and then inserted into cavities in insulating blocks.
  • a plurality of pin contacts 2 are inserted into one block and a like number of socket contacts 24 are inserted into another block.
  • each of the individual pin contacts in the one block is mated with a socket contact in the other block.
  • An exemplary type of insulating block is shown fragmentarily in FIGURE 14 to comprise a relatively firm section 26 and a relatively yieldable section 28, these two sections being either secured to each other by a suitable adhesive or held against each other by means of a surrounding shell or frame.
  • the relatively hard portion 26 of the insulating block may be of any suitable relatively hard moldable insulating material such as diallyl phthalate while the resilient section 28 may be of a neoprene rubber.
  • the two sections 26, 28 each have openings extending therethrough which together define a cavity adapted to receive the pin contact after it has been crimped onto the end of a wire.
  • the opening in the relatively firm and hard section 26 of the insulating block is cylindrical as shown at 32 in its forward section which opens into the mating face 3%.
  • the opening is also cylindrical at 34 but of a diameter somewhat less than the cylindrical section 32, the diameter of the cylindrical section 34 being slightly less than the diameter of the collar 6 of the pin contact and approximately equal to the diameter of the portion 8 of the pin plus two times the metal thickness of the retainer as is apparent from FIGURE 11.
  • a pair of bosses 36 are provided between the two cylindrical portions 34, 32 having arcuate surfaces 42 and defining a forwardly facing shoulder 38 at the end of the cylindrical section 32 and a rearwardly facing shoulder 40 at the end of the cylindrical section 34.
  • the resilient portions of the composite housing 28 has a cylindrical opening 44 having a normal diameter which is substantially equal to the diameter of collar 6 of the contact. Opening 44 has a plurality of inwardly extending collars 46 near its rearward end so that upon insertion, the collars 46 will resiliently press against the surface of the wire to form an environmental seal for the contact.
  • the forward end 45 of the opening 44 is of a reduced diameter thereby to form a stop for the collar 6 and to limit inward movement of the contact.
  • the retaining means 48 in accordance with the invention comprises a split cylindrical sleeve 50 having a pair of opposed axially forwardly extending arms 52, the ends of which are enlarged at 54 to form arcuate cylindrical segments having the axis of the sleeve t) as a center.
  • the extreme end portions of the arms are somewhat flared at 56 outwardly to facilitate the removal of a contact from the cavity in a manner described below.
  • the edges of the enlarged ends 54 of the arms which are opposed to the split sleeve 50 are inwardly turned to form radially inwardly directed lips or flanges 60 which flanges folow the arcuate cylindrical configuration of the enlarged end portions 54 of the arms.
  • the inner surfaces of the arms are provided with protuberances 58 in the form of dimples which function as camming means during insertion of the contact into the cavity.
  • the diameter of the split sleeve 50 should be slightly less than the diameter of the cylindrical portion 34 of the cavity in the relatively hard insulating block 26.
  • the retaining means 48 is inserted into the cavity in the block portion 26 prior to assembly of the two block portions 26, 28 to each other. Insertion is accomplished by axially aligning the retainer 48 with the cavity on the righthand side thereof as viewed in FIGURE 6 and with the arms 52 in rotational alignment with the surfaces 42 of the bosses. After aligning the retainer with the cavity in this manner, the retainer is inserted until the enlarged ends are disposed forwardly of the forward shoulder 38 in the cavity. Thereafter the retainer is rotated until the bosses extend into the spaces between the lips 60 and the split sleeve 50 as is shown in FIGURE 9.
  • the retainer After such insertion and rotation of the retainer, it can not move leftwardly from the position of FIGURE 9 by virtue of the engagement between the split collar 50 and the rearwardly facing shoulders 40 and rightward movement of the retainer is prevented by the inwardly turned lips which bear against the forwardly facing shoulders 38.
  • the diarneter of the forward cylindrical section 32 of the cavity is substantially greater than the diameter of the frontal end of the retainer at the flared sections 56 so that the retainer can be flexed outwardly as is described below.
  • FIGURES 11-13 are not true longitudinal cross sectional views but are taken along the lines 1111 of FIGURE 10 and drawn to show a full elevation. The purpose of this type of view is to clearly show both the function of the lips 69 and the function of the dimpies 58.
  • the arms Upon further leftward movement of the contact from the position of FIGURE 12 to the position of FIGURE 13, the arms are permitted to return resiliently to their normal position and the bosses 58 will project into the recess defined by the conical surface 10 and the shoulder 12.
  • the lips 60 extend inwardly beyond surfaces 42 of the bosses and are disposed between the shoulders 38 of the bosses and the shoulder 12 of the contact terminal. If the wire to which the contact terminal is attached is pulled, the contact terminal will tend to move rightwardly in FIGURE 13 but will be prevented from movement by the lips 60 which will be wedged between the shoulder 38 and the shoulder 12 of the contact. Withdrawal of the contact from the cavity is thus virtually impossible so that application of extremely high withdrawal force to the conductor would result in destruction of the contact or the retainer rather than in the contact being removed from the cavity.
  • a simple tool comprising a tubular sleeve 62 and a plunger 64 is used as shown in FIGURE 14.
  • the tool is inserted into the cavity from the mating face until the bevelled edge of the tube 62 engages the inner surfaces of the flared ends of the contact.
  • the arms 52 are flexed outwardly by the tube so that upon subsequent rightward movement of the plunger 64, the contact is pushed rightwardly from the cavity and past the inwardly directed lips 60 which will have been moved out of the way of the cylindrical contact portion 14.
  • a retaining means in accordance with the invention functions substantially in the same manner with the socket contact 24 as with the pin contact of FEGURE 1.
  • the forward end 25 of the socket contact is slightly tapered to facilitate insertion and to exert a camming action on the dimple 53 of the retainer.
  • a salient advantage of the invention is that the contacts can be retained in their cavities positively and securely in a manner such that accidental removal is virtually impossible although intentional removal when de sired can be accomplished with relative ease and without damage to the contacts or to the retainer. Additionally, since the retaining means is contained within the cavity, the possibility of damage thereto is avoided as is the case where the retaining means are provided on the contact.
  • Electrical connecting means comprising, an insulating housing having a generally cylindrical cavity extending therethrough, a generally cylindrical contact retainer disposed in said cavity, said retainer having an opening intermediate its ends, a boss in said cavity extending into said opening thereby to provide interlocking means for holding said retainer in said cavity, said retainer having an inwardly directed lip disposed forwardly of said boss and extending radially inwardly beyond said boss, and an inwardly directed protuberance on said retainer between the rearward end thereof and said lip, said cavity being adapted to receive an electrical contact having a rearwardly facing shoulder intermediate its ends and having a camming surface in front of said shoulder whereby, upon insertion of said contact into said cavity, said camming surface contacts said protuberance and said lip is forced radially outwardly to permit passage of said shoulder beyond said lip, and subsequently said lip returns to its normal position and is disposed between said boss and said shoulder to restrain said contact against withdrawal.
  • said retainer comprises a split sleeve having at least one arm axially therefrom, an enlarged end on said arm, the space between said enlarged end and said sleeve constituting said opening, and said lip extending from said enlarged end.
  • said retainer comprises a split cylindrical sleeve having an arm extending axially therefrom, an enlarged end on said arn, said sleeve being disposed on one side of said boss and said enlarged end being disposed on the other side of said boss, said lip extending from said enlarged end, and said protuberance being provided on said arm intermediate the ends thereof.
  • Electrical connecting means comprising, an insulating body having a cylindrical cavity therein, a pair of opposed bosses in said cavity intermediate the ends thereof, said bosses having arcuate surfaces extending generally parallel to the walls of said cavity and each boss having a shoulder facing forwardly of said cavity, contact retaining means in said cavity comprising a cylindrical sleeve having axially extending arms on one end, said sleeve being disposed on one side of said bosses and said arms extending between said bosses, enlarged arcuate ends on said arms extending circumferentially around said cavity in front of said bosses, said enlarged ends each having an inwardly turned lip in front of and opposed to said shoulders, said lips normally extending radially inwardly beyond said arcutate surfaces of said bosses, and a cylindrical electrical contact in said cavity having a circumferential recess and a rearwardly facing shoulder in opposed relationship to said shoulders on said bosses, said recess being in alignment with said lip with said lip extending into said recess whereby
  • a contact retainer comprising a split cylindrical sleeve, a pair of arms extending from opposite sides of said sleeve at one end thereof, enlarged ends on said arms extending arcuately partially around the axis of said sleeve, the edges of said enlarged ends which are roximate to said sleeve having inwardly turned lips, and each of said arms having a radially inwardly directed protuberance on its inner surface intermediate its ends, said retainer being intended for usage in a cylindrical cavity having a pair of opposed bosses intermediate its ends with said sleeve disposed against said bosses on one side, with said arms extending between said bosses, and with said lips being against said bosses on their opposite sides whereby, a contact terminal having an intermediate circumferential recess disposed in said cavity is restrained against axial motion in one direction by the wedging effect of said lips in said recess.
  • a contact retainer comprising a cylindrical sleeve, arms extending axially from opposite sides of said sleeve at one end thereof, enlarged ends on said arms extending arcuately partially around the axis of said sleeve, the trailing edges of said enlarged ends which are proximate to said sleeve having lips directed radially inwardly towards the axis of said sleeve, the leading edge portions of said enlarged ends which are remote from said sleeve being conical and divergent with respect to the axis of said sleeve, said retainer being intended for usage in a cylindrical cavity having a pair of opposed bosses intermediate its ends with said sleeve disposed against said bosses on one side with said arms extending between said bosses, and with said lips being disposed against said bosses on their opposite sides whereby, a contact terminal having an intermediate circumferential recess disposed in said cavity is restrained against axial motion in one direction by the wedging effect of said lips between

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Connector Housings Or Holding Contact Members (AREA)
US194369A 1962-05-14 1962-05-14 Electrical connecting device Expired - Lifetime US3143385A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
BE632200D BE632200A (fr) 1962-05-14
NL135882D NL135882C (fr) 1962-05-14
US194369A US3143385A (en) 1962-05-14 1962-05-14 Electrical connecting device
GB16941/63A GB965395A (en) 1962-05-14 1963-04-30 Improvements in or relating to electrical connectors
DEA43053A DE1257925B (de) 1962-05-14 1963-05-07 Anordnung zur loesbaren Festlegung eines elektrischen Verbindungskontaktes in einem Gehaeuse
FR934633A FR1360920A (fr) 1962-05-14 1963-05-13 Connecteurs électriques
CH605463A CH398730A (fr) 1962-05-14 1963-05-14 Dispositif de connexion
JP2520063A JPS397169B1 (fr) 1962-05-14 1963-05-14

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US194369A US3143385A (en) 1962-05-14 1962-05-14 Electrical connecting device

Publications (1)

Publication Number Publication Date
US3143385A true US3143385A (en) 1964-08-04

Family

ID=30442690

Family Applications (1)

Application Number Title Priority Date Filing Date
US194369A Expired - Lifetime US3143385A (en) 1962-05-14 1962-05-14 Electrical connecting device

Country Status (8)

Country Link
US (1) US3143385A (fr)
JP (1) JPS397169B1 (fr)
BE (1) BE632200A (fr)
CH (1) CH398730A (fr)
DE (1) DE1257925B (fr)
FR (1) FR1360920A (fr)
GB (1) GB965395A (fr)
NL (1) NL135882C (fr)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3245030A (en) * 1963-10-25 1966-04-05 Amico Anthony F D Replaceable contact for multiple connector
US3323098A (en) * 1965-03-22 1967-05-30 Amp Inc Sub-miniature coaxial connector
US3383643A (en) * 1965-09-02 1968-05-14 Pyle National Co Wire splicing device having a cantilever contact arm
US3383642A (en) * 1965-09-02 1968-05-14 Pyle National Co Wire splice
US4269472A (en) * 1979-10-26 1981-05-26 Amp Incorporated Electrical terminal
US4359258A (en) * 1980-01-14 1982-11-16 Trw Inc. Electrical connector
US4701004A (en) * 1986-12-22 1987-10-20 Amp Incorporated Retention clip for electrical contacts
US4941847A (en) * 1989-07-24 1990-07-17 Itt Corporation Electrical connector contact retention system
US5366391A (en) * 1992-12-01 1994-11-22 Itt Corporation Connector using standard housing and modified socket contact
US20040033104A1 (en) * 2002-08-16 2004-02-19 Hans Kieninger Clip unit for holding contact
US20090269957A1 (en) * 2008-04-25 2009-10-29 Bloomfield John D Electrical interconnection systems and methods of assembling the same
US20090318007A1 (en) * 2008-04-25 2009-12-24 Bloomfield John D Electrical interconnection systems and methods of assembling the same
US20140287627A1 (en) * 2013-03-15 2014-09-25 Amphenol Corporation Mating interfaces for high speed high density electrical connectors
US9559452B1 (en) * 2015-08-07 2017-01-31 Amphenol Corporation Housing for electrical contact

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8029322B1 (en) * 2010-09-27 2011-10-04 Tyco Electronics Corporation Electrical contact assemblies and connectors including retention clips
US20230216230A1 (en) * 2020-05-28 2023-07-06 Oetiker Schweiz Ag High current terminal assembly, electric machine and battery including such a high current terminal assembly

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2054497A (en) * 1935-06-10 1936-09-15 Henry A Doherty Attachment plug
US3068443A (en) * 1960-05-05 1962-12-11 Pyle National Co Multi-conductor connector

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2689337A (en) * 1952-04-04 1954-09-14 Burtt Shaped metal contact
FR1188936A (fr) * 1957-05-12 1959-09-28 Burndy Corp éléments de connexion électrique à broche et douille
NL126153C (fr) * 1958-10-28

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2054497A (en) * 1935-06-10 1936-09-15 Henry A Doherty Attachment plug
US3068443A (en) * 1960-05-05 1962-12-11 Pyle National Co Multi-conductor connector

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3245030A (en) * 1963-10-25 1966-04-05 Amico Anthony F D Replaceable contact for multiple connector
US3323098A (en) * 1965-03-22 1967-05-30 Amp Inc Sub-miniature coaxial connector
US3383643A (en) * 1965-09-02 1968-05-14 Pyle National Co Wire splicing device having a cantilever contact arm
US3383642A (en) * 1965-09-02 1968-05-14 Pyle National Co Wire splice
US4269472A (en) * 1979-10-26 1981-05-26 Amp Incorporated Electrical terminal
US4359258A (en) * 1980-01-14 1982-11-16 Trw Inc. Electrical connector
US4701004A (en) * 1986-12-22 1987-10-20 Amp Incorporated Retention clip for electrical contacts
US4941847A (en) * 1989-07-24 1990-07-17 Itt Corporation Electrical connector contact retention system
US5366391A (en) * 1992-12-01 1994-11-22 Itt Corporation Connector using standard housing and modified socket contact
US20040033104A1 (en) * 2002-08-16 2004-02-19 Hans Kieninger Clip unit for holding contact
US6957988B2 (en) * 2002-08-16 2005-10-25 Itt Manufacturing Enterprises, Inc. Clip unit for holding contact
US20090269957A1 (en) * 2008-04-25 2009-10-29 Bloomfield John D Electrical interconnection systems and methods of assembling the same
US20090318007A1 (en) * 2008-04-25 2009-12-24 Bloomfield John D Electrical interconnection systems and methods of assembling the same
US7753741B2 (en) * 2008-04-25 2010-07-13 Times Microwave Systems, Inc. Electrical interconnection systems and methods of assembling the same
US7942697B2 (en) 2008-04-25 2011-05-17 Times Microwave Systems, Inc. Electrical interconnection systems and methods of assembling the same
WO2010025162A3 (fr) * 2008-08-28 2010-05-20 Times Microwave Systems, Inc. Systèmes d'interconnexion électrique et procédés de montage de ceux-ci
US20140287627A1 (en) * 2013-03-15 2014-09-25 Amphenol Corporation Mating interfaces for high speed high density electrical connectors
US9419360B2 (en) * 2013-03-15 2016-08-16 Amphenol Corporation Mating interfaces for high speed high density electrical connectors
US9559452B1 (en) * 2015-08-07 2017-01-31 Amphenol Corporation Housing for electrical contact

Also Published As

Publication number Publication date
JPS397169B1 (fr) 1964-05-12
BE632200A (fr)
GB965395A (en) 1964-07-29
NL135882C (fr)
FR1360920A (fr) 1964-05-15
CH398730A (fr) 1966-03-15
DE1257925B (de) 1968-01-04

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