With Protective Means For Switch Or Contacts Patents (Class 335/156)
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Patent number: 6229416Abstract: 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: GrantFiled: July 28, 2000Date of Patent: May 8, 2001Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.Inventors: Koohei Ebihara, Tamotsu Tokita
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Patent number: 6094117Abstract: 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: GrantFiled: September 4, 1998Date of Patent: July 25, 2000Assignee: Kloeckner-Moeller GmbH.Inventor: Klaus Dieter Nuerenberg
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Patent number: 6043728Abstract: 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: GrantFiled: December 22, 1997Date of Patent: March 28, 2000Assignees: Kaneka Corporation, Tochigi Kaneka CorporationInventors: Takeshi Ida, Naoshi Marutani
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Patent number: 6040750Abstract: 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: GrantFiled: May 20, 1999Date of Patent: March 21, 2000Assignee: Siemens AktiengesellschaftInventor: Hans Pfab
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Patent number: 5969244Abstract: 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: GrantFiled: April 13, 1998Date of Patent: October 19, 1999Assignee: The United States of America as represented by the Secretary of the NavyInventor: Peter W. Machado
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Patent number: 5734308Abstract: 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: GrantFiled: December 19, 1996Date of Patent: March 31, 1998Assignee: Siemens AktiengesellschaftInventors: Michael Dittmann, Jens Heinrich
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Patent number: 5672919Abstract: 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: GrantFiled: March 24, 1995Date of Patent: September 30, 1997Assignee: ABB Power T&D Company Inc.Inventors: Raymond E. Johnson, deceased, B. S. Johns, administrator, Janusz W. Dzieduszko
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Patent number: 4926282Abstract: 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: GrantFiled: June 13, 1988Date of Patent: May 15, 1990Assignee: BICC Public Limited CompanyInventor: Terence V. McGhie
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Patent number: 4847719Abstract: 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: GrantFiled: February 9, 1988Date of Patent: July 11, 1989Inventors: Max W. Cook, Wade E. Moose, David C. Steele
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Patent number: 4638275Abstract: 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: GrantFiled: March 22, 1985Date of Patent: January 20, 1987Assignee: La Telemecanique ElectriqueInventors: Elie Belbel, Robert Caudron, Louis Fechant, Andre Haury, Michel Lauraire, Jacques Muniesa, Lucien Siffroi
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Patent number: 4573030Abstract: 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: GrantFiled: December 29, 1983Date of Patent: February 25, 1986Assignee: AT&T Bell LaboratoriesInventor: Rudolf Schubert
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Patent number: 4243964Abstract: 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: GrantFiled: February 7, 1979Date of Patent: January 6, 1981Assignee: Robert Bosch GmbHInventors: Karl-Heinz Bogner, Martin Sprenger
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Patent number: 4219861Abstract: 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: GrantFiled: November 27, 1978Date of Patent: August 26, 1980Assignee: Gould Inc.Inventor: Henry Wiegand
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Patent number: 4203084Abstract: 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: GrantFiled: May 8, 1978Date of Patent: May 13, 1980Assignee: Nippondenso Co., Ltd.Inventors: Takao Yamaguchi, Kenjiro Aoyama, Yukihiro Nishio, Sadayosi Kazino
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Patent number: 4158828Abstract: 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: GrantFiled: May 11, 1977Date of Patent: June 19, 1979Assignee: General Electric CompanyInventor: Thomas J. Kindelspire