子分类：
| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 241 | Mercury switch | US3646490D | 1970-08-24 | US3646490A | 1972-02-29 | BITKO SHELDON S |
| An attitude insensitive mercury relay included in a hermetically sealed nonmagnetic enclosure composed of a header and header cap, welded together in a high-pressure hydrogen atmosphere, including one or more stationary contacts extending insulatedly into the enclosure and a magnetic diaphragm as armature, in the form of a single planartight spiral having physically separated turns. In one form of the device, the interior of the enclosure and the diaphragm may be mercury wettable, excluding only an insulating feedthrough button for a stationary contact, and also excluding a portion of the face of the contact which is intended to sustain impact by the armature, the mercury wettable portion of that face being indented with respect to the impact area, and the quantity of mercury in the enclosure being sufficient, but only sufficient, to sustain a thin layer of mercury on the mercury wettable surfaces. In other forms the enclosure may be nonmetallic, e.g., ceramic, provided with mercury wettable screen surfaces.
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| 242 | Contact device | US3638151D | 1970-09-15 | US3638151A | 1972-01-25 | HEIDE HENDRIK VAN DER |
| Contact device comprising an electrically conductive contact spring clamped tight at one end, whereas its freely movable end is located opposite a countercontact, and comprising an energizing coil controlling the contact spring and having its field extending in the direction of length of the contact spring, which is provided at its movable part near the clamped end with at least one permanent magnet surrounded by the energizing coil and polarized transversely of the direction of length of the contact spring.
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| 243 | Vacuum relay | US3629746D | 1970-05-04 | US3629746A | 1971-12-21 | LUCIA VICTOR E DE |
| An improved construction for a miniature vacuum relay is provided, whereby the relay is capable of a latching operation. The relay responds to an electric pulse of a first polarity to move from one electrical switching condition to another, and it remains in the second electrical switching position until a second pulse of opposite polarity is applied to the relay, at which time the relay returns to its original switching position. A permanent magnet is included in the magnetic circuit of the relay so that when the armature is moved against the action of the biasing spring of the relay to a particular position, it is retained in that position by the permanent magnet until an opposing magnetic flux is created in the magnetic circuit to nullify the action of the permanent magnet.
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| 244 | Long lived switch means for inductive dc circuits | US3621275D | 1970-12-03 | US3621275A | 1971-11-16 | SANTI JOHN D |
| A switch having unlike metal contacts in a deep vacuum environment has its higher melting point contact connected to be negative at switch opening. In shunt across the switch contacts are a resistor and a capacitor, in series; or a resistor alone can be shunted across the load. In either case the resistor is of about 500 to 5,000 ohms. The capacitor is of a value to afford to the shunt circuit a time constant of not less than about one microsecond.
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| 245 | Magnetically operated envelope enclosed high-voltage relay | US3604870D | 1970-03-02 | US3604870A | 1971-09-14 | LUCIA VICTOR E DE |
| A high-voltage vacuum relay is provided of the double-pole, double-throw type and which has particular application to medical purposes, although it is not limited to uses. The movable and fixed contacts of the relay are mounted with an envelope, with the movable contacts supported by the envelope for pivotal movement, and for selective engagement with the fixed contacts in a manner such that under no conditions will one contact of any pair open without the other.
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| 246 | Apparatus for automatically switching high frequency signals | US3568096D | 1969-08-11 | US3568096A | 1971-03-02 | KORDOS RONALD W; MCCURDY THOMAS A |
| A device for establishing a high frequency signal conducting path between two groups of transmission lines is disclosed which contains cable switches and a strip line assembly. Both the cable switches and the strip line assembly are joined to each other at one end and at the opposite end one is joined to one transmission line group while the other is joined to the second transmission line group.
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| 247 | Flat pack relay | US3533025D | 1969-01-31 | US3533025A | 1970-10-06 | KRIZMAN THEODORE M; EMMONS CLAYTON M |
| 248 | Reed relay | US3522564D | 1969-02-25 | US3522564A | 1970-08-04 | MORI TETSUO; TAKADA TAKASHI; OKAHASHI KEIJI; MATSUMURA SUEYOSHI |
| 249 | Magnetic relay structure having plural operative magnets | US3522562D | 1967-02-27 | US3522562A | 1970-08-04 | SCHON ADOLF; ANGERMAIER HUGO |
| 250 | Free vane magnetic circuit | US3514728D | 1967-11-03 | US3514728A | 1970-05-26 | UGON PIERRE EUGENE |
| 251 | Magnetic repulsion actuated switch | US3487342D | 1968-02-07 | US3487342A | 1969-12-30 | GIBSON NEIL J; GRAHAM HOWARD M |
| 252 | Bingo card with depressible numbered projections | US3456948D | 1966-07-18 | US3456948A | 1969-07-22 | BOSCO JOSEPH |
| 253 | Vacuum relay | US3443046D | 1967-06-05 | US3443046A | 1969-05-06 | LUCIA VICTOR E DE |
| 254 | Magnetic relay structure and system | US58162766 | 1966-09-23 | US3404358A | 1968-10-01 | GUNDOKAR BRAUMANN; HANS ROTTER |
| 255 | Blade armature contact in sealed housing | US53087966 | 1966-03-01 | US3348174A | 1967-10-17 | RUDOLF SCHEIDIG |
| 256 | Relay having improved armature and mobile contact assembly | US43250765 | 1965-02-15 | US3344253A | 1967-09-26 | ROESSLER CLARK T; TETZ RONALD V |
| 257 | Vacuum coaxial relay | US42933665 | 1965-02-01 | US3342966A | 1967-09-19 | GURAYDIN ORHAN A |
| 258 | Magnetic reed switches having minimum contact bounce | US49365765 | 1965-10-07 | US3334320A | 1967-08-01 | FRANK GERALD F |
| 259 | Planar semiconductor device with improved emitter and base configuration | US44939765 | 1965-04-20 | US3329874A | 1967-07-04 | MARIA HOSPEL PETRUS ALBERTUS |
| 260 | Electric circuit utilizing an adjustable and resettable fuse | US41236764 | 1964-11-19 | US3319128A | 1967-05-09 | NILSSEN OLE K |
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