Contact Encasing Chamber Patents (Class 439/186)
  • Patent number: 11791071
    Abstract: A surge arrester device comprising a first housing portion including a first end and a second end, the first end including a first opening and the second end including a second opening. The device includes a first axis parallel to the first housing portion, the first axis intersecting a first center of the first opening and a second center of the second opening, and a second axis perpendicular to the first housing portion, the second axis intersecting an intermediate section of the first housing portion. The device includes a second housing portion protruding from the intermediate section of the first housing portion, the second housing portion protruding at an angle between the first axis and the second axis, and a metal oxide varistor (MOV) stack within the second housing portion, wherein the MOV stack is released through an opening of the second housing portion if the arrester faults to ground.
    Type: Grant
    Filed: January 5, 2023
    Date of Patent: October 17, 2023
    Assignee: Hubbell Incorporated
    Inventors: David Charles Hughes, Bastiaan Hubertus van Besouw
  • Patent number: 11791582
    Abstract: A plug contact stamped from a strip of sheet metal, the plug contact including cut edges and rolled sides; a clamping section configured to fix the plug contact in a contact carrier; a contact fork formed by two spring elastic contact arms forming a receiving cavity between each other and including cut edges that are oriented towards each other, wherein a first end of the two spring elastic contact arms respectively originates from the clamping section and a second end of the two spring elastic contact arms respectively forms a contact bud, wherein the two spring elastic contact arms include rolled sides that are oriented towards each other and produced by forming the second end of the spring elastic contact arms respectively.
    Type: Grant
    Filed: April 8, 2022
    Date of Patent: October 17, 2023
    Assignee: LUMBERG CONNECT GMBH
    Inventors: Oleg Svencickij, Paulo Russo, Dirk Pfaffenbach
  • Patent number: 11387595
    Abstract: A system for making an autonomous connection between a first electrical contact and a second electrical contact includes a first receiver with the first contact therein and a second receiver with a second contact therein. The receivers are at least partially disposed within respective first and second housings. A first cover is disposed over an opening of the first housing and a second cover is disposed over an opening of the second housing. The covers seal the ends of the housings and the ends of the receivers, providing a double seal to the contacts. As the receivers are moved toward each other, the covers are automatically moved out of engagement with the receivers and housing. As the receivers are moved away from each other, the covers are automatically moved back into engagement with the housings and receivers.
    Type: Grant
    Filed: September 11, 2019
    Date of Patent: July 12, 2022
    Assignee: MAGNA INTERNATIONAL INC.
    Inventors: Gregor Schnoell, Martin Winter
  • Patent number: 10826229
    Abstract: A connector (10) includes terminals (14) and a housing (12) with terminal accommodating portions (36) to accommodate the terminals (14). Each terminal (14) includes a terminal connecting portion (18) extending in a front-rear direction and a vertical wire connecting portion (20) perpendicular to the front-rear direction. A first coupling portion (22A) extends in the front-rear direction from a rear end of the terminal connecting portion (18), and a second coupling portion (22B) extends vertically from an extending end of the first coupling (22A) to the wire connecting portion (20). Projections (30) project from sides of the first coupling portion (22A) in a third direction perpendicular to the front-rear direction and the vertical direction. Grooves (42) are open in inner walls (38A) of the terminal accommodating portion (36) facing each other in the third direction, and the projections (30) contact inner walls of the grooves (42) in the vertical direction.
    Type: Grant
    Filed: November 25, 2019
    Date of Patent: November 3, 2020
    Assignee: Sumitomo Wiring Systems, Ltd.
    Inventor: Shinji Hirano
  • Patent number: 10734769
    Abstract: A safety electrical power connector can include a first connector body having a first electrical contact and an outer surface, and a second connector body that engages the first connector body in an axial direction. The second connector body can have a second electrical contact and an inner surface configured to slide relative to the outer surface of the first connector body in the axial direction during engagement of the first and second connector bodies. The outer surface and the inner surface can define a gap therebetween sufficient to establish an isolation enclosure that isolates a volume containing the first and second electrical contacts therein. The gap can be formed prior to electrical communication of the first and second electrical contacts thereby preventing an explosion due to arcing between the first and second electrical contacts.
    Type: Grant
    Filed: July 19, 2018
    Date of Patent: August 4, 2020
    Assignee: Western Technology, Inc.
    Inventors: Michael Kralik, Lyal Christensen
  • Patent number: 10535953
    Abstract: A connector (10) includes a connector pin portion to be electrically connected to a case (R), a tubular portion (11) for accommodating the connector pin portion to face a mating member, and first and second bracket holding portions (21, 22) extending from an end part of the tubular portion (11) opposite to a side facing the connector pin portion and to be engaged with a bracket (30). Each of the first and second bracket holding portions (21, 22) includes insertion grooves (23, 24) through which the bracket (30) is insertable, and two bracket holding portions are provided on a lower surface (11a) of the tubular portion (11), which is the end part opposite to the side facing the connector pin portion.
    Type: Grant
    Filed: June 13, 2018
    Date of Patent: January 14, 2020
    Assignee: Sumitomo Wiring Systems, Ltd.
    Inventor: Tomoyuki Kondo
  • Patent number: 10236640
    Abstract: An electrical connector for a safety restraint system comprises a connector housing, a plurality of contact elements disposed in the connector housing, an activation member movable relative to the connector housing in an activation direction between a deactivation position and an activation position, and a short-circuiting member disposed on the activation member. The connector housing is adapted to be plugged into a mating connector in a plug-in direction. The contact elements are adapted to be brought into electrical contact with a plurality of mating contact elements of the mating connector. The short-circuiting member is disposed on the activation member and electrically connects the contact elements only in the deactivation position. The contact elements are not electrically connected to one another in the activation position.
    Type: Grant
    Filed: November 29, 2017
    Date of Patent: March 19, 2019
    Assignee: Tyco Electronics France SAS
    Inventors: Olivier Pamart, Nicolas Simon, Xavier Rouillard, Francois Jodon De Villeroche
  • Patent number: 9397440
    Abstract: A connector includes: a terminal which is fixed to a conductor exposed from an end portion of a covered wire; a sealing portion which is made of an insulating and elastic material, and which integrally covers an adjacent portion of the terminal and a sheath of the covered wire; and a housing which is made of an insulating resin having rigidity higher than the elastic material, and which integrally covers whole of the sealing portion provided around the end portion of the covered wire. A terminal-side end face of the sealing portion is exposed from the housing at a bottom of an annular recess formed in a terminal-side end face of the housing so as to surround the terminal.
    Type: Grant
    Filed: January 9, 2015
    Date of Patent: July 19, 2016
    Assignee: YAZAKI CORPORATION
    Inventors: Shigeo Mori, Masayuki Kataoka, Fuminori Sugiyama, Yoshitaka Koda
  • Patent number: 9124024
    Abstract: A connector (10) includes a housing (20) connectable to a mating housing of the mating connector. A female terminal (52) is held in the housing (20) and includes a terminal connecting portion (52A) to be connected to a mating terminal provided in the mating connector and a barrel (52B) connected to the terminal connecting portion (52A). A flexible outer wire (70) is pulled out to outside from the interior of the housing (20). An inner conductive member (50) connects the barrel (52B) and the outer wire (70) in the housing (20) and includes an intermediate portion (53C) formed by bending a metal plate material substantially at a right angle. The intermediate portion (53C) is fixed to the housing (20).
    Type: Grant
    Filed: August 15, 2013
    Date of Patent: September 1, 2015
    Assignee: Sumitomo Wiring Systems, Ltd.
    Inventors: Kiyotaka Itsuki, Hiroyuki Matsuoka, Sho Miyazaki, Tomokazu Kashiwada
  • Patent number: 8297995
    Abstract: The invention relates to a device for preventing the establishment of an electric arc between two adjacent parts, which have no electrical insulation, of at least two electrically conductive elements, comprising at least one piece made of a dielectric material, said device having at least one through-opening for receiving at least one of said at least two electrically conductive elements so as to surround at least one of said at least two adjacent parts, which have no electrical insulation, of said at least two electrically conductive elements.
    Type: Grant
    Filed: March 16, 2009
    Date of Patent: October 30, 2012
    Assignee: Centre National d'Etudes Spatiales
    Inventor: Denis Payan
  • Patent number: 8085527
    Abstract: A plug-in housing module for forming an-explosion-proof switchgear/distribution panel including a number of plug-in points, where when the plug-in housing module is in a plugged-in position at a corresponding plug-in point of the number of plug-in points, the plug-in housing module is brought into contact with electrical connection devices and is detachably fixed to carrier rails of a frame of the switchgear/distribution panel, the plug-in housing module including at least one switching device for switching between a locking position and a release position, and when the at least one switching device is in the release position, the plug-in housing module can be moved out of the plugged-in position into a separation position, where in the separation position, the contact with the electrical connection devices is interrupted, while maintaining a flameproof mechanical connection.
    Type: Grant
    Filed: August 30, 2007
    Date of Patent: December 27, 2011
    Assignee: Cooper Crouse-Hinds GmbH
    Inventors: Reiner Naumann, Gerhard Schwarz, Markus Reinhart
  • Patent number: 8070501
    Abstract: A high-voltage electrical connector includes a strategically placed barrier that acts as an arc shield to reduce the ionization of materials during load break switching, reducing or preventing flashover. An electric stress graded interface design also reduces switching flashover and reduces the fault close energy. Mating features on the piston-contact element and inside the surrounding container accurately guide the piston-contact element as it travels along the container.
    Type: Grant
    Filed: June 24, 2010
    Date of Patent: December 6, 2011
    Assignee: 'Hubbell Incorporated
    Inventors: Senthil A. Kumar, Todd C. Boggs
  • Publication number: 20110097916
    Abstract: The invention relates to a device for preventing the establishment of an electric arc between two adjacent parts, which have no electrical insulation, of at least two electrically conductive elements, comprising at least one piece made of a dielectric material, said device having at least one through-opening for receiving at least one of said at least two electrically conductive elements so as to surround at least one of said at least two adjacent parts, which have no electrical insulation, of said at least two electrically conductive elements.
    Type: Application
    Filed: March 16, 2009
    Publication date: April 28, 2011
    Inventor: Denis Payan
  • Publication number: 20110034051
    Abstract: A high-voltage electrical connector includes a strategically placed barrier that acts as an arc shield to reduce the ionization of materials during load break switching, reducing or preventing flashover. An electric stress graded interface design also reduces switching flashover and reduces the fault close energy. Mating features on the piston-contact element and inside the surrounding container accurately guide the piston-contact element as it travels along the container.
    Type: Application
    Filed: June 24, 2010
    Publication date: February 10, 2011
    Applicant: HUBBELL INCORPORATED
    Inventors: Senthil A. KUMAR, Todd C. BOGGS
  • Patent number: 7794252
    Abstract: An explosion-proof connector (1) comprises a plug part (2) and a socket part (3), the plug part (2) comprising a plug housing (4) with at least two plug pins (6) arranged in a plug insert (5), and the socket part (3) comprising a socket housing (7) with matching socket contacts (9) arranged in a socket insert (8). In order to simplify such an explosion-proof connector in a way that it can be handled more easily especially when disconnecting plug part and socket part while maintaining explosion proofness, one housing (4, 7) comprises an outer sleeve (10) which is detachably connectable to the other housing (7, 4), a first gap (11) being formed between outer sleeve (10) and other housing (7, 4) and a second gap (12) between outer sleeve (10) and associated insert (4, 8) already before electrically contacting plug pins (6) and socket contacts (9) for realizing type of protection d, flameproof enclosure, and type of protection e, increased safety, respectively.
    Type: Grant
    Filed: July 11, 2006
    Date of Patent: September 14, 2010
    Assignee: Cooper Crouse-Hinds GmbH
    Inventors: Dieter Sauer, Reiner Naumann, Gerhard Schwarz
  • Patent number: 7708576
    Abstract: A high-voltage electrical connector system comprises a bushing with a longitudinal axis, a shoulder, a first end, and a second end, wherein the shoulder is between the first end and the second end; a ring arranged circumferentially around a first outside diameter of the bushing, the ring disposed between the shoulder and the second end, the ring including a channel therein defining a circumferential extension extending axially toward the first end; a ground shield disposed on a second outside diameter of the bushing between the ring and the second end, the ground shield comprising one or more of conductive material and semiconductive material; and an insulative portion adjacent the ring and disposed circumferentially over a portion of the ground shield.
    Type: Grant
    Filed: August 25, 2008
    Date of Patent: May 4, 2010
    Assignee: Cooper Industries, Ltd.
    Inventors: David Charles Hughes, Marie Way, Mark Kadow
  • Publication number: 20100068907
    Abstract: An elbow terminator has a socket in which an electrical probe is disposed. The terminator is insertable onto an electrical bushing such that a tongue of the bushing is received in the socket of the terminator, and the probe of the terminator is electrically coupled to a contact sleeve disposed within the tongue. A latching mechanism produces positive latching between the tongue and socket when the tongue has been inserted to a predescribed depth within the socket. In order to enable an operator to visually observe that the tongue has been inserted to the prescribed depth, the bushing carries a color band which becomes completely disposed (invisible) in the socket when positive latching occurs. Alternatively, the bushing can be provided with gauge tabs which become aligned with a witness line formed on the terminator when positive latching occurs.
    Type: Application
    Filed: November 23, 2009
    Publication date: March 18, 2010
    Applicant: Cooper Technologies Company
    Inventors: Andrew Edgar Meyer, Todd Kim Knapp, Frank John Muench
  • Publication number: 20090081896
    Abstract: A separable loadbreak connector system includes mating electrical connectors. At least one of the electrical connectors includes an electrically-resistive housing having a generally conically-shaped interior bore. A semiconductive insert is disposed within a portion of the interior bore and presents an inner radial surface that defines a generally conically-shaped recess. An elongated probe assembly is disposed within the housing and includes a probe and a sheath of insulative material disposed over at least a portion of a length of the probe. A portion of the sheath extends in a radially outward direction from a base of the probe. An electrically-resistive insulative layer extends from the conically-shaped interior bore, along at least a portion of the inner radial surface of the semiconductive insert. The insulative layer extends radially inwardly in overlapping engagement with a portion of the sheath.
    Type: Application
    Filed: November 20, 2008
    Publication date: March 26, 2009
    Applicant: COOPER TECHNOLOGIES COMPANY
    Inventors: David Charles Hughes, Brian Todd Steinbrecher
  • Publication number: 20080311774
    Abstract: An explosion-proof connector (1) comprises a plug part (2) and a socket part (3), the plug part (2) comprising a plug housing (4) with at least two plug pins (6) arranged in a plug insert (5), and the socket part (3) comprising a socket housing (7) with matching socket contacts (9) arranged in a socket insert (8). In order to simplify such an explosion-proof connector in a way that it can be handled more easily especially when disconnecting plug part and socket part while maintaining explosion proofness, one housing (4, 7) comprises an outer sleeve (10) which is detachably connectable to the other housing (7, 4), a first gap (11) being formed between outer sleeve (10) and other housing (7, 4) and a second gap (12) between outer sleeve (10) and associated insert (4, 8) already before electrically contacting plug pins (6) and socket contacts (9) for realizing type of protection d, flameproof enclosure, and type of protection e, increased safety, respectively.
    Type: Application
    Filed: July 11, 2006
    Publication date: December 18, 2008
    Applicant: COOPER CROUSE-HINDS GMBH
    Inventors: Dieter Sauer, Reiner Naumann, Gerhard Schwarz
  • Patent number: 6811418
    Abstract: An electrical connector may include a connector body having a passageway therethrough with a first end for receiving an electrical bushing insert including a shoulder, and a second end for receiving an electrical conductor. The connector body may have an outer end portion adjacent the first end of the passageway with a flared shape. The outer end portion may be movable to the flared shape upon abutting a shoulder of the electrical bushing insert. The outer end portion may have a radius of curvature so that it progressively curls to the flared shape upon abutting the shoulder of electrical bushing insert. To facilitate the flaring and/or to reduce the vacuum, the outer end portion may have a series of slits therein. The outer end portion may be formed to initially have the flared shape even when spaced from the shoulder of the electrical bushing insert.
    Type: Grant
    Filed: May 15, 2003
    Date of Patent: November 2, 2004
    Assignee: Homac Mfg. Company
    Inventors: Roy E. Jazowski, Matthew D. Cawood
  • Patent number: 6506067
    Abstract: The disconnector essentially comprises two isolating contacts (2), which are arranged in electrically conductive encapsulation (1) filled with insulating gas, and an isolating contact finger (3) arranged such that it can be moved between them. An insulation coating (7) is applied to the inside of the encapsulation (1) and has projections (8) pointing inward. The insulation coating prevents a disconnector spark (5), whose production cannot be avoided when the disconnector is opened, from flashing over onto the encapsulation (1). Furthermore, additional projections (9) prevent the spark from propagating in the direction of the isolating contacts (2).
    Type: Grant
    Filed: August 31, 2001
    Date of Patent: January 14, 2003
    Assignee: ABB Research Ltd.
    Inventors: Marco Piemontesi, Gerhard Salge, Christoph Heitz, Herbert Meinecke, Diego Sologuren-Sanchez
  • Publication number: 20030008543
    Abstract: A protective cap for an electrical connector of a hard drive. The connector is assembled to a hard disk that contains one or more electrical circuits. The protective cap can be placed onto the top of the electrical connector to prevent an electrostatic discharged onto the connector. The cap can therefore protect the electrical circuits from damage due to an electrostatic discharge onto the connector.
    Type: Application
    Filed: December 21, 2001
    Publication date: January 9, 2003
    Inventors: Youn Tai Kim, Sung Wook Kim, Gregory Tran
  • Publication number: 20020182911
    Abstract: A voltage isolator connector is described for a printed circuit board. The connector includes an end wall; a first side wall extending from the end wall, and a second side wall extending from the end wall. The first and second side walls form an isolator compartment with the end wall, and the end wall and the first and second side walls are configured for attachment to the printed circuit board.
    Type: Application
    Filed: June 1, 2001
    Publication date: December 5, 2002
    Inventors: Warren R. Germer, Patrick J. Horan
  • Publication number: 20010044230
    Abstract: A first connector 4 has a plurality of first terminal accommodating portions 3 which are disposed at a predetermined distance from each other and which have terminal accommodating chambers 1 accommodating female terminals 2. A second connector 8 has a plurality of second terminal accommodating portions 7 having terminal accommodating chambers 6 accommodating male terminals 5. The male terminal 5 comes into contact with the female terminals 2. The second terminal accommodating portions 7 has a leak preventing piece 11 for preventing a leak between the adjacent terminals 2. The leak preventing piece 11 projects from a connecting side tip end surface 7a of each of the second terminal accommodating portion 7, and the leak preventing piece 11 is inserted into a space 12 between the adjacent first terminal accommodating portions 3.
    Type: Application
    Filed: May 2, 2001
    Publication date: November 22, 2001
    Applicant: Yazaki Corporation
    Inventor: Shogo Suzuki
  • Patent number: 6227908
    Abstract: Electrical interconnection arrangements are provided for connecting together two pieces of electrical equipment. A first connection component includes a first elongate conductive member, which in use is at a relatively high voltage, enclosed within insulating material. A portion of the first conductive member protrudes at one end beyond an end surface of the insulating material. The other end of the first member is arranged for electrical connection with one of the pieces of electrical equipment. One end of the first conductive member has an enlarged radiussed region within the insulating material adjacent the protruding portion to provide electrical stress relief at the exposed surface of the insulating material. A second connection component includes a second elongate conductive member enclosed within insulating material which has a socket exposed at an end surface thereof for receiving the protruding end of the first conductive member.
    Type: Grant
    Filed: September 22, 1999
    Date of Patent: May 8, 2001
    Inventors: Wolfram Aumeier, Bodo Bottcher, Josef Harrer
  • Patent number: 6203341
    Abstract: A cable connector of the present invention comprises an insulative housing, a number of conductive contacts, a pair of positioning levers and an insulative shell. The insulative housing has a mating face on a front end for mating with a mating connector and receives a mating portion of the conductive contacts therein. A metal shield is fitted to the front end of the insulative housing, thereby enclosing the mating portion of the conductive contacts. The pair of the positioning levers extends through respective holes defined in opposite sides of the insulative housing and each defines a retaining portion which extends beyond the mating face of the insulative housing for securely engaging with a mating connector. The insulative shell encloses the retaining portions of the pair of the positioning levers and the metal shield, thereby guarding electronic components near the cable connector from accidental electrostatic discharge.
    Type: Grant
    Filed: October 19, 1999
    Date of Patent: March 20, 2001
    Assignee: Hon Hai Precision Ind. Co., Ltd.
    Inventor: Denis Chen
  • Patent number: 5567170
    Abstract: A plug-in electrical connector for use with an electrical submergible pumping system comprises a pothead having a first electrical connector member surrounded by a sleeve of insulative material extending from the pothead, and a terminal block with a recess therein adapted to receive thereinto the sleeve on the pothead and with a second electrical connector member set within the recess. The sleeve and the recess configured and sized to form a circuitous arc path, and the second electrical connector member is adapted to form an electrical connection with the first electrical connector member. A fluidic seal is included at the interface of the pothead and the terminal block. The circuitous arc path prevents shorting out by greatly increasing the distance shorting material, such as water, must travel from one phase to another phase or to ground.
    Type: Grant
    Filed: December 7, 1994
    Date of Patent: October 22, 1996
    Assignee: Camco International Inc.
    Inventor: Richard B. Kroeber
  • Patent number: 5387123
    Abstract: A cable connector 10 for high voltage which includes a housing 11 and a protective rear cover 12. The protective rear cover 12 is inserted into the housing 11. The protective rear cover 12 has latching projections 23 formed thereon and the housing 11 has latch apertures 17 to receive the latching means. In a preferred embodiment, the latching projections 23 are formed on arms 21, 22 having flange portions that extend sidewardly and forwardly from the latching projections 23. The arms 21, 22 are received inside the housing 11 adjacent to the latch apertures 17 and cover any spaces of the housing wall latch apertures 17 not filled by the latching projections 23 to prevent arcing through the apertures 17. In another preferred embodiment, a sleeve-like member 34 is disposed over the cable receiving face 13 of the housing 11. The sleeve-like member 34 covers the latch apertures 17 and prevents arcing.
    Type: Grant
    Filed: June 6, 1994
    Date of Patent: February 7, 1995
    Assignee: The Whitaker Corporation
    Inventor: Dean A. Puerner
  • Patent number: 5267871
    Abstract: An electrical connector (1) having an internal switch (2), comprises, a conductive exterior shell (3) with a stepped interior (30), an insulator (4) encircled by the shell (3), and a pair of electrical contacts (5, 6) retained within the insulator (4), a plug contact receiving passage (16) encircled by the insulator (4), and the contacts (5, 6) retaining the insulator (4) immobile against the stepped interior (30) of the shell (3).
    Type: Grant
    Filed: July 2, 1992
    Date of Patent: December 7, 1993
    Assignee: The Whitaker Corporation
    Inventor: James R. Flanagan
  • Patent number: 5201666
    Abstract: A novel adapter for interfacing vintage oil fuse cutout devices with modern high-voltage cable terminations embodying a modern-standard bushing well at one end and a conductive member for mating with a cable entrance terminal of the cutout at the other end, and with mechanical (threaded) coupling to the device.
    Type: Grant
    Filed: November 14, 1991
    Date of Patent: April 13, 1993
    Assignee: Hotsplicer Corporation
    Inventor: James P. Markham
  • Patent number: 5112236
    Abstract: An electrical contact comprising a male element and a female element in which the male element is mounted for sliding with a tight fit, an air chamber being formed between an end of the male element and a bottom of the female element, the male and female elements being at least partially made from a porous material impregnated with an aqueous solution charged with submicron metal particles.
    Type: Grant
    Filed: May 16, 1991
    Date of Patent: May 12, 1992
    Assignee: Societe Cetra S.a.r.l.
    Inventors: Jean-Paul Martin, Jean-Claude Moisand
  • Patent number: 4824377
    Abstract: A female pin connector is disclosed which inhibits damaging levels of an electrostatic discharge from entering the unmated pin connector. The female pin connector supports a conductive barrier member at the mating end of the pin contacts. The conductive barrier member, which can be in the form of a conductive sheet, strip, wire, printed circuit or the like is located outward from and encompasses the mating end of the pin contacts. The conductive barrier member is adapted to be coupled to a member which can receive and safely dissipate the electrostatic discharge.
    Type: Grant
    Filed: February 3, 1988
    Date of Patent: April 25, 1989
    Assignees: Americal Telephone and Telegraph Company, AT&T Bell Laboratories
    Inventor: Agostino L. De Burro
  • Patent number: 4681385
    Abstract: An electrical connector system comprising a cylindrical plug assembly with terminals and a cylindrical socket assembly with terminals is disclosed. The assemblies may be axially joined virtually independent of their rotational orientation with respect to each other to effect the proper coupling of the terminals. The terminals of each assembly are recessed within their assemblies and coil springs are positioned to bias the terminals into an electrical coupling relationship with one other.
    Type: Grant
    Filed: April 11, 1986
    Date of Patent: July 21, 1987
    Assignee: Dart Industries Inc.
    Inventors: Kurt J. Kruger, Lester Miller