The first match was accidentally discovered in 1826 when John Walker scraped a stick with chemicals on the end against a stone floor.
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| Number | Title | Issue Date |
| 4512627 | Optical fiber switch, electromagnetic actuating apparatus with permanent magnet latch control Actuating apparatus for an optical fiber switch in which a single fiber array (19) retained in a retaining block (20, 21) is movable within a housing (17) to align the single array (19) with one (10) or the other (11) of two fixed fiber arrays. A shuttle ... | 04/23/1985 |
| 4407562 | Optical fiber switch Switching between optical fibers is achieved through the use of a fixed (101) and a moveable (102) housing disposed within a slotted support member (103, 205). The fixed and moveable housings respectively contain first (104, 105) and second (108) sets of ... | 10/04/1983 |
| 4401365 | Rotary type optical switch Disclosed is an optical switch of the rotary-type in which a pair of opposing optical transmission path mounting members are disposed on the same axis. A plurality of junction faces of optical transmission paths disposed on the respective opposing plane p... | 08/30/1983 |
| 4278327 | Liquid crystal matrices The improved electrooptical devices provide means for switching pluralities of polarized or unpolarized optical signals between input and output multimode single strand light guides. The electrooptical switching elements employ electric field-effect liqui... | 07/14/1981 |
| 4239332 | Self-aligning fiber optic relay This invention provides for a relay apparatus for use with optical fibers. A first set of optical fiber ends is mechanically secured in a suitably shaped retainer. A second set of optical fiber ends is secured in a second retainer appropriately shaped to ... | 12/16/1980 |
| 4220396 | Fiber optic switch A fibre optic switch is constructed by having two flat springs each of which carries optical fibres which end at one edge of the spring. The two spring ends are close to each other and at 90°, so that by suitable positioning of the springs any fibre on o... | 09/02/1980 |
| 4189206 | Optical switching device An optical switching means including an optical fiber moving means which is moved by an electromagnetic force, a spring body which has a guide hole through which an optical fiber passes and at least one magnetic body. The magnetic body is fixed on one of ... | 02/19/1980 |
| 4088387 | Optical switch An optical switch affords the selective coupling of any of a plurality of input light signals to any of a plurality of optical output paths. A first plurality of ports circumferentially disposed in a first common plane supports means for transmitting and/... | 05/09/1978 |
| 4065677 | Electrically controlled switching device The invention relates to electrically controlled switching devices in which a movable member can occupy at least two stable positions. The invention has for its object to provide a switching device in which the movable member is a dielectric body having r... | 12/27/1977 |