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 |
| 7148453 | Control unit with thermal protection and an electrical heating device comprising the control unit An overheating protection system for a control unit includes an interrupter element, which, in its initial position defined with respect to a circuit board, electrically connects the opposite facing ends of at least one track on the circuit board, and an actuating e... | 12/12/2006 |
| 7050271 | Actuator having doped silicon arms and method of making the same An actuator to which leads are easily attachable, and a method of making the same are provided. In the actuator in accordance with the present invention, a pair of silicon arms have their resistances lowered by being doped with impurities and are connected to each o... | 05/23/2006 |
| 6937131 | Self-shadowing MEM structures Self-shadowed microelectromechanical structures such as self-shadowed bond pads, fuses and compliant members and a method of fabricating self-shadowing microelectromechanical structures that anticipate and accommodate blanket metalization process steps are disclosed... | 08/30/2005 |
| 6724291 | Door sensing fuse block with side extending rotary disconnect A fuse block for cabinet mounting provides a shaft that may exit a side of the cabinet to be received by a handle mounted on that side. A finger attached to the inner cabinet door provides for an interlock by engaging with a bolt communicating with the shaft prevent... | 04/20/2004 |
| 6459353 | Housing for fused switch The present invention relates to a fused switch housing (1) suited to accommodate at least one fuse adapter (2) having a first and a second contact surface (10). The fused switch housing (1) comprises a first and a second set of terminals (15) for respect... | 10/01/2002 |
| 5923238 | Overvoltage protective module An overvoltage protective module comprising a base body made of plastic with embedded contact strips, overvoltage suppressers arranged on the top of the base body and provided with fuse elements, and contact springs which hold the overvoltage suppressers ... | 07/13/1999 |
| 5311393 | Transient voltage surge suppressor with I2 R/I2 T overcurrent protection switch A transient voltage surge suppressor comprises a first series circuit formed of a normally-off voltage surge-responsive gas discharge tube and a first voltage clamping device connected across input terminals to which a line voltage is applied. It also inc... | 05/10/1994 |
| 4501956 | Electrical resistance heating element Electrical resistance heating element including a number of metal strips arranged in a meander-like pattern. In the resistance metal strips, which are made from a non-expensive base sheet material like lead, there is incorporated at least one fuse which w... | 02/26/1985 |
| 4323871 | Circuit protecting apparatus including resettable vacuum fuse and switch A current-responsive, resettable, violence-free low fault range vacuum-type switch interrupter is disclosed which is especially designed for series connection with a high fault range current limiting fuse (CLF) to achieve an improved, full range circuit p... | 04/06/1982 |
| 4275373 | Combination expulsion fuse A combination fuse has a current limiting section and a low current expulsion section with the expulsion section within the high current section. This arrangement makes it possible to increase the length of the expulsion tube as compared to the prior art ... | 06/23/1981 |
| 4184138 | Offset, series connected current limiting fuse and expulsion fuseholder assembly for opengate cutout A combination dropout assembly adapted for use with protective cutouts in an electrical distribution system comprises a current limiting fuse electrically connected in series with an explusion-type fuse, and mechanically coupled in skewed relation to the ... | 01/15/1980 |
| 4083028 | Pad-mounted double-fused vacuum switchgear Pad-mounted double-fused switchgear especially adapted for use in underground distribution systems is provided which includes an oil tank having manually operable vacuum switch apparatus therein in conjunction with closely adjacent, series-connected, comb... | 04/04/1978 |