| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 81 | Operation-staggered dual switch | US196435 | 1998-11-20 | US5981885A | 1999-11-09 | Yuichi Katoh; Hiroyuki Yahagi |
| An operation-staggered dual switch is provided having a casing, first and second switching mechanisms installed in the casing, the switching mechanisms being operatively connected such that operation of the first switching mechanism may follow operation of the second switching mechanism after a predetermined delay, wherein the operation-staggered dual switch includes delay means comprising a connection rod having indentations formed on one side, a train of toothed wheels having a leading toothed wheel and a trailing toothed wheel, the leading toothed wheel of the train of toothed wheels being engaged with selected indentations of the connection rod, and a rotary damper connected to the trailing toothed wheel of the train of toothed wheels, the connection rod being responsive to initiation of operation of the first switching mechanism for moving in a given direction. | ||||||
| 82 | Current limiting shunt for current limiting circuit breakers | US811341 | 1997-03-04 | US5859578A | 1999-01-12 | David Arnold |
| A compact current limiting circuit breaker is equipped with a current limiting shunt for effective over-current circuit interruption. The circuit breaker trip unit responds to long time, short time and instantaneous over-current conditions by opening a set of contacts to isolate the protected circuit. Upon contact separation an arc is drawn, with the endpoints of the arc being initially rooted on the pair of open contacts. Further opening of the contacts commutates the arc into the current limiting shunt to redirect the current away from the trip unit and suppress the arcing current until the circuit breaker contacts are sufficiently open to isolate the protected circuit. | ||||||
| 83 | Combination load controller | US161017 | 1993-12-03 | US5473495A | 1995-12-05 | James A. Bauer |
| A combination load controller for controlling application of power to a load such as a motor, has an input terminal coupleable to a power source, and an output terminal coupleable to a load. A conductive polymer and a protective, electromagnetic switch are disposed along a current path between the input and output terminals. The conductive polymer has a relatively low electrical resistance during conduction at nominal currents. The resistance of the conductive polymer increases substantially promptly upon conduction of excessive current, e.g., due to a short-circuit. In this manner the load is protected from even short bursts of excessively high, short-circuit current by the insertion of additional series resistance by the conductive polymer. The electromagnetic switch protects the line and load by opening the current path. The switch includes a current or voltage sensor coupled to a logic controller that opens the switch if over-current or under-voltage conditions persist for a predetermined period. | ||||||
| 84 | Current limiter unit for molded case circuit breakers | US189614 | 1994-01-31 | US5428195A | 1995-06-27 | David Arnold |
| A self-contained current limiter unit allows lower short-circuit-rated circuit breakers to be utilized within industrial applications. The unit is electrically-connected in series with the circuit breakers and the protected load to limit the short circuit current to a fixed predetermined value while the circuit breaker trip unit responds to interrupt the circuit current. A single unit can be arranged in electrical series connection with a plurality of lower short-circuit-rated circuit breakers to allow a substantial savings in component and equipment costs. | ||||||
| 85 | Commutating type DC circuit breaker arrangement | US18190 | 1993-02-16 | US5402297A | 1995-03-28 | Shigetoshi Ouchi; Haruo Honda; Toru Yoshida; Yukio Kugoh; Fumihisa Ichikawa; Tutomu Kanno; Takashi Ichinose; Hideaki Tsuda |
| A commutating type DC circuit breaker arrangement comprising: a vacuum circuit breaker having a movable electrode and stationary electrode; a series circuit of a capacitor, a saturation reactor and a commutating switch which is connected in parallel with the vacuum circuit breaker; and an electrical relay for detecting a predetermined electrode open position at which a sufficient insulating distance between the movable electrode and the stationary electrode is maintained via movement of a predetermined position on an actuating rod for the movable electrode and for closing the commutating switch in response to the detection of the predetermined electrode open position. | ||||||
| 86 | Oxide resistor | US748166 | 1985-06-24 | US4736183A | 1988-04-05 | Takeo Yamazaki; Satoru Ogihara; Tetsuo Kosugi; Shingo Shirakawa; Shinichi Owada |
| A composite sintered oxide resistor comprising crystal grains of zinc oxide and crystal grains of a zinc oxide compound of other metal or semi-metal element than zinc, and a grain boundary layer having an electric resistance equal to or lower than that of the crystal grains and which of zinc oxide between the individual crystal grains has a very large withstanding capacity against switch surge, a small non-linear coefficient of voltage in the voltage-current characteristics, a positive, smaller resistance-temperature coefficient, and a small percent change in resistivity after heat treatment at 500.degree. C. in the atmosphere. | ||||||
| 87 | Device for limiting currents | US604147 | 1975-08-13 | US4021699A | 1977-05-03 | Erhard Runtsch |
| The combination of a current limiting device and at least one openable isolating point electrically connected therewith, the current limiting device including a variable, pressure-sensitive solid-state resistance the resistance being variable from an initially relatively very low resistance or impedance value to a relatively very high resistance or impedance value when the isolating point is opened, the solid-state resistance being integrated into the isolating point as a switch contact member. | ||||||
| 88 | Current limiting circuit breaker | US465011 | 1974-04-29 | US3946346A | 1976-03-23 | Clark L. Oster; James A. Tharp |
| A current limiting circuit breaker having for each pole, a pair of main contacts separable upon operation of a thermally and electromagnetically operable tripping device and a pair of auxiliary contacts for current limiting in series with the main contacts and in parallel with a transformable resistor having a positive temperature coefficient of resistance. The auxiliary contacts are separable when an electromagnet is energized by a fault current which simultaneously energizes a field magnet to produce a transverse magnetic field across the auxiliary contacts and the arc formed between them when separating. This simultaneous action of electromagnet and field magnet coacting for rapid contact separation and lengthening of the arc upon flow of a fault current serves to increase arc voltage almost instantaneously to that of the source, about which time the fault current is totally shunted into the resistor. An armature and armature pin are mounted for reciprocal movement when the electromagnet is energized. The armature pin is operatively connected to the auxiliary contact blades which are mounted for pivotal movement from a contact closed to a contact open position when the armature and armature pin are attracted by the electromagnet. A compression coil spring encircles the armature pin to bias the auxiliary contact blades toward a normally contact closed position. | ||||||
| 89 | Excess current switching device | US525311 | 1974-11-19 | US3944954A | 1976-03-16 | Jakob Ellenberger |
| An excess current switching device having particular but not exclusive application in switching direct current power.The switching device comprises first and second excess current switches. The first switch comprises a break point and a thermal and/or electromagnetic tripping device(s) linked to a latching mechanism and the second switch comprises a break point and an electromagnetic tripping device having a high resistance coil linked to a latching mechanism. The break point of the first switch is connected in parallel with the tripping device of the second switch. When an excess current occurs, the break point of the first switch opens, leaving the tripping device of the second switch in curcuit and this opens the break point of the second switch. | ||||||
| 90 | Current limiting circuit breaker | US465399 | 1974-04-29 | US3944953A | 1976-03-16 | Clark L. Oster |
| A current limiting circuit breaker having for each pole, a pair of main contacts separable upon operation of a thermally and electromagnetically operable tripping device and a pair of auxiliary contacts for current limiting in series with the main contacts and in parallel with a transformable resistor having a positive temperature coefficient of resistance. The auxiliary contacts are separable when an electromagnet is energized by a fault current which simultaneously energizes a field magnet to produce a transverse magnetic field across the auxiliary contacts and the arc formed between them when separating. This simultaneous action of electromagnet and field magnet coacting for rapid contact separation and lengthening of the arc upon flow of a fault current serves to increase arc voltage almost instantaneously to that of the source, about which time the fault current is totally shunted into the resistor. The tripping device for the main contacts includes a main trip lever for latching engagement with an armature, releasable upon energization of a magnetic core due to a fault current. It also includes a second trip lever normally latched by a rotatable trip bar, which is rotated to unlatching position by a bimetal when deflected due to prolonged overload conditions. When the second trip lever is unlatched, it strikes the armature thereby releasing it from latching engagement with the main trip lever allowing the tripping device to open the main contacts. | ||||||
| 91 | Current limiting circuit interrupter device | US39006473 | 1973-08-20 | US3836819A | 1974-09-17 | CLAUSING C |
| A helically wound coil is connected in series with a circuit interrupter and electrical contacts on diametrically opposite sides of each turn of the coil form direct current paths in parallel for each coil so that substantially no inductance is in the power circuit when the contacts are closed. The contacts are opened sequentially in response to a fault current to gradually introduce one or more turns of the coil in the series circuit in order to limit the rise of fault current before the series interrupter device is operated.
|
||||||
| 92 | Magnetic arc blowout device | US3575635D | 1968-09-09 | US3575635A | 1971-04-20 | MAGGI ERNESTO |
| Device for blowing out the arc struck between the contacts of electric switching devices, utilizing magnetic fields for the removal of the arc from the contact gap, and comprising, in combination with the magnetic means, at least one electric resistor, located outside of the extinction chamber proper and in such a manner as to be progressively inserted into the electric circuit that is connected with the contacts, due to the shifting of the related end of the arc length along the resistor(s), while the arc is being removed from the contact gap.
|
||||||
| 93 | Arc-suppressing switching device | US3562584D | 1968-10-22 | US3562584A | 1971-02-09 | YOSHIMURA KOICHI |
| An arc-suppressing switching device particularly for application to bimetallic element containing thermostats of electric blankets, electric irons, electric cookers, electric foot warmers, and the like. The switching device has a high dielectric constant material, electric resistance material or semiconductor material positioned between a fixed contact plate having a fixed contact on its free end, and is capable of suppressing or extinguishing the arc which occurs at the opening and closing of the thermostat contacts.
|
||||||
| 94 | Current limiting interrupter with arc-inserted non-linear resistors | US3495056D | 1965-07-22 | US3495056A | 1970-02-10 | JENSEN OTTO |
| 95 | Electrical switching arrangement with multiple interruption | US3448287D | 1966-08-23 | US3448287A | 1969-06-03 | GIAMMONA SALVATORE |
| 96 | Liquid sensitive switch | US3437769D | 1967-03-13 | US3437769A | 1969-04-08 | VINCENT THOMAS G |
| 97 | Automobile safety level indicator | US3422544D | 1967-01-16 | US3422544A | 1969-01-21 | WYSE DAVID S |
| 98 | Field discharge breaker | US43646865 | 1965-03-02 | US3301985A | 1967-01-31 | WILSON GEORGE A |
| 99 | High voltage double break air switch with damping resistors | US23726362 | 1962-11-13 | US3235694A | 1966-02-15 | THALLNER KARL A |
| 100 | Non-arcing switch | US8210661 | 1961-01-11 | US3129305A | 1964-04-14 | HURTLE RALPH L |
QQ群二维码
意见反馈
意见反馈