With Protective Means For Switch Or Contacts Patents (Class 335/156)
  • Patent number: 6229416
    Abstract: In a magnetic switch for a starter, an impact force due to return force of a contact pressing coil spring 25 for a plate shaped movable contact 19 is received by a collar 18a formed integral with a movable non-magnetic shaft 18, and an insulative spring stopper member 22 having a cylindrical portion 22a is disposed beneath the contact pressing coil spring concentrically therewith in an overlapping manner along the movable non-magnetic shaft. A hollow cylindrical coil 14 is secured by a casing side plate 16 of a casing 15 and another side plate 17 having a tapered cylindrical protrusion 17a in axial and radial directions with respect to a magnetic core including the side plates 16, 17 and the casing 15.
    Type: Grant
    Filed: July 28, 2000
    Date of Patent: May 8, 2001
    Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.
    Inventors: Koohei Ebihara, Tamotsu Tokita
  • Patent number: 6094117
    Abstract: An electromagnetic switching device (2) with restricted guidance, in which the closure contacts do not come into contact when the break contact is welded or fixed. An elastically resilient transmission lever (10) is provided to establish the effective connection between the armature (8) and the contact support (12) extending at a distance from and parallel to the armature.
    Type: Grant
    Filed: September 4, 1998
    Date of Patent: July 25, 2000
    Assignee: Kloeckner-Moeller GmbH.
    Inventor: Klaus Dieter Nuerenberg
  • Patent number: 6043728
    Abstract: Provided are non-halogen, flame-resistant, resin materials and resin magnet materials, and also electron beam controllers comprising the resin magnet materials. The resin material comprises (A) a non-halogen resin composition, (B) a metal oxide hydrate, and (C) one or both of antimony trioxide and zinc borate. The resin magnet material comprises those components (A), (B) and C), and (D) a magnetic material. In the electron beam controller, the four-pole and 6-pole convergence magnets and the two-pole purity controller magnets are made of the resin magnet materials.
    Type: Grant
    Filed: December 22, 1997
    Date of Patent: March 28, 2000
    Assignees: Kaneka Corporation, Tochigi Kaneka Corporation
    Inventors: Takeshi Ida, Naoshi Marutani
  • Patent number: 6040750
    Abstract: A switching device is provided which includes a magnet system having a yoke which is elastically mounted by means of a volute spring. The volute spring permits the yoke to be displaced as far as closure of the magnet system. As a result, it is possible to prevent current overloading of the magnet system coil in the case of a welded break contact of the switching device.
    Type: Grant
    Filed: May 20, 1999
    Date of Patent: March 21, 2000
    Assignee: Siemens Aktiengesellschaft
    Inventor: Hans Pfab
  • Patent number: 5969244
    Abstract: A switch assembly and method of making same are provided. First and second eals are mounted in spaced apart relation about the elongate body of a delicate switch such as a reed switch. The resulting switch/seal assembly is inserted into a rigid housing that encases the switch and seals. The housing is in circumferential contact with each seal. The seals are spaced apart from one another to reside on either side of a port in the side of the housing so that an annular chamber is defined between the elongate body and the housing between the seals. A damping material is injected through the port to fill the annular chamber. The housing can extend past the elongate body at either end to define first and second open-ended chambers through which electrical leads extending from the elongate body pass through. The damping material can also be used to fill the first and second open-ended chambers once electrical connection to the leads is made.
    Type: Grant
    Filed: April 13, 1998
    Date of Patent: October 19, 1999
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Peter W. Machado
  • Patent number: 5734308
    Abstract: Electromagnetic, monostable, small relay has a rocker armature arranged between a base plate and a coil, the armature being mounted with its middle segment at the end of an L-shaped yoke, and forming a working air gap with a second yoke. Contact springs are connected with the armature, which work together with fixed contacts anchored in the base. A resetting spring is connected with the armature and prestresses the armature into a rest position on the first yoke. For stabilization of the construction, and for separation between a contact chamber and a coil chamber, a base body is provided with an H-shaped cross-section, which overlaps the base plate in an interleaving manner, and which forms supports for the terminal pins of the base plate on both sides of the armature. In this way, a monostable relay is created, which can have any of conventional soldering pin terminals, SMT terminals, or press-fit terminals.
    Type: Grant
    Filed: December 19, 1996
    Date of Patent: March 31, 1998
    Assignee: Siemens Aktiengesellschaft
    Inventors: Michael Dittmann, Jens Heinrich
  • Patent number: 5672919
    Abstract: Disclosed is a low current binary input subsystem for providing a binary input signal to a data acquisition system. The binary input subsystem monitors the open/close state of a field contact and provides galvanic isolation of noisy field contacts, high noise immunity, a steady state current of approximately 1.2 milliamps resulting in power dissipation of approximately 0.25 watts for a 125 VDC input, and a momentary high current pulse of approximately 150 milliamps for a duration of approximately 4 milliseconds during field contact closure to aid in cleaning of oxides from the field contact.
    Type: Grant
    Filed: March 24, 1995
    Date of Patent: September 30, 1997
    Assignee: ABB Power T&D Company Inc.
    Inventors: Raymond E. Johnson, deceased, B. S. Johns, administrator, Janusz W. Dzieduszko
  • Patent number: 4926282
    Abstract: An electric circuit breaker for protecting an electric circuit of an electrical installation of a building is of such a construction that a substantial proportion of its components are standard for the preferred current ratings of the breaker and that some components having a limited useful life can be readily replaced.
    Type: Grant
    Filed: June 13, 1988
    Date of Patent: May 15, 1990
    Assignee: BICC Public Limited Company
    Inventor: Terence V. McGhie
  • Patent number: 4847719
    Abstract: The contacts of an electrical switch, such as a magnetic contact reed switch or a magnetic contact reed relay used in a burglar alarm system, are protected from being fused together by transient current surges. This protection is accomplished by providing a normally nonconductive shunting path in parallel with the switch. The shunting path includes a voltage responsive device which is biased to conduction in response to a current surge to thereby complete the shunting path and allow the current surge to bypass the switch.
    Type: Grant
    Filed: February 9, 1988
    Date of Patent: July 11, 1989
    Inventors: Max W. Cook, Wade E. Moose, David C. Steele
  • Patent number: 4638275
    Abstract: An electric switching unit for preventing oxidation of copper-base contacts in contactors comprises a body (2), comprises an electromagnet (11) having a stationary yoke (7) and a moving armature (15) in cooperating relation with a plurality of switches (36). A protective casing (42) is fixed on the body so as to contain the switches. The contact-studs (30, 31, 32, 33) of the switches (36) essentially have a base of cuprous materials while a non-oxidizing atmosphere is confined and maintained beneath the protective casing (42) by seals (55, 23, 47). The seals are placed on the one hand between the moving armature (15) and a first face (21) of the body (2) and on the other hand between the casing (42) and a second face (41) of the body which is opposite to the first face.
    Type: Grant
    Filed: March 22, 1985
    Date of Patent: January 20, 1987
    Assignee: La Telemecanique Electrique
    Inventors: Elie Belbel, Robert Caudron, Louis Fechant, Andre Haury, Michel Lauraire, Jacques Muniesa, Lucien Siffroi
  • Patent number: 4573030
    Abstract: Sealed relays often contain organic matter which reduce the conductivity of the electrical contacts. The invention is a sealed relay with a catalytic metal (Pd, Pt, Ni, Rh, Ir, Co, Fe, Os and Ru) on a rubbing surface which polymerizes the organic matter into a solid polymer that does not interfere with the electrical contacts.
    Type: Grant
    Filed: December 29, 1983
    Date of Patent: February 25, 1986
    Assignee: AT&T Bell Laboratories
    Inventor: Rudolf Schubert
  • Patent number: 4243964
    Abstract: In order to effectively disconnect a contact bridge from fixed terminals, even though the contact bridge may be sticking to the contacts, or may be welded or hang, a plunger-type armature core is slidable within a central sleeve of a solenoid for a travel path which is in excess of the connecting path length of the contact bridge towards the fixed terminals. Upon disconnection, a spring returns the armature plunger and, with it, a switching rod which will pass through the overtravel path length before engaging the contact terminals, if the contact terminals should stick, thus exerting a blow against the connecting bridge and tearing it away from the contact terminals.
    Type: Grant
    Filed: February 7, 1979
    Date of Patent: January 6, 1981
    Assignee: Robert Bosch GmbH
    Inventors: Karl-Heinz Bogner, Martin Sprenger
  • Patent number: 4219861
    Abstract: A protector means is provided to prevent thermal destruction of a solenoid adapted for very short duration energization at currents far in excess of the continuous current carrying capability of the solenoid. The protector means includes a positive temperature coefficient thermistor which controls the gate potential of an S.C.R. whose power circuit is in series with the solenoid. When thermistor temperature rises to a predetermined level the voltage applied to the gate drops below the gate threshold thereby preventing the S.C.R. from firing on the next positive half-cycle.
    Type: Grant
    Filed: November 27, 1978
    Date of Patent: August 26, 1980
    Assignee: Gould Inc.
    Inventor: Henry Wiegand
  • Patent number: 4203084
    Abstract: An electromagnetic switch has a movable contact and a stationary contact accommodated and sealed in a container of a given shape. In the container, there are provided at the axial top and bottom of the container, meander venting paths for communicating the inside of the container with surrounding atmosphere. The ventilation of the inside of the container is thus effectively attained by the meander paths so that the formation of ice on the stationary contact can be prevented.
    Type: Grant
    Filed: May 8, 1978
    Date of Patent: May 13, 1980
    Assignee: Nippondenso Co., Ltd.
    Inventors: Takao Yamaguchi, Kenjiro Aoyama, Yukihiro Nishio, Sadayosi Kazino
  • Patent number: 4158828
    Abstract: A relay device adapted to be removably mounted in plug-on circuit relation with at least a pair of male terminals of an electrically energized apparatus. The relay device has receptacle means including a first portion with a pair of cavities for respectively receiving in predetermined seated position therein a pair of female terminals adapted for electrical contacting engagement with the male terminal pair. A cover portion is disposed in a predetermined assembled position on the first portion so as to generally enclose the chambers. The cover portion includes means for positioning engagement with the female terminal pair so as to maintain them generally against displacement from their predetermined seated positions in the cavities and a pair of openings communicating with the cavities and generally aligned with the female terminal pair for passing the male terminal pair into the cavities so as to be received in the electrical contacting engagement with the female terminal pairs.
    Type: Grant
    Filed: May 11, 1977
    Date of Patent: June 19, 1979
    Assignee: General Electric Company
    Inventor: Thomas J. Kindelspire