Did You Know...
...that after Parker Brothers executives turned down the game of Monopoly because it had "52 fundamental errors" (including taking too long to play), a copy of the game wound up in the home of the company president who stayed up until 1 a.m. to finish playing it? He was so impressed by the game that the next day he wrote to inventor Charles Darrow and offered to buy it!
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| Number | Title | Issue Date |
| 6608266 | Pressure switch with annular electrodes method of making same A pressure switch assembly has a cup-shaped piston slidable in a bore covered with an elastomeric diaphragm responsive to external pressure to move the piston. A pair of axially spaced ring electrodes have a flange on the piston disposed between the rings... | 08/19/2003 |
| 6262463 | Micromachined acceleration activated mechanical switch and electromagnetic sensor A micro-sensor having have a flexible monocrystalline structure that is moved by an external force. In one embodiment, one or more pole tips are mounted on the monocrystalline structure. The monocrystalline structure is suspended over one or more planar c... | 07/17/2001 |
| 6194678 | Pressure switch A pressure switch with improved sealing of an airtight chamber, and improved electrical characteristics reducing chattering, increasing response rate, and minimizing the pressure necessary for activation. The pressure switch includes an upper substrate wi... | 02/27/2001 |
| 5627396 | Micromachined relay and method of forming the relay A bridging member extending across a cavity in a semiconductor substrate (e.g. signal crystal silicon) has successive layers--a masking layer, an electrically conductive layer (e.g. polysilicon) and an insulating layer (e.g. SiO2). A first elec... | 05/06/1997 |
| 5479042 | Micromachined relay and method of forming the relay A bridging member extending across a cavity in a semiconductor substrate (e.g. single crystal silicon) has successive layers--a masking layer, an electrically conductive layer (e.g. polysilicon) and an insulating layer (e.g. SiO2). A first elec... | 12/26/1995 |
| 5177579 | Semiconductor transducer or actuator utilizing corrugated supports A semiconductor transducer or actuator is disclosed. The transducer and actuator each include a deflecting member with corrugations producing increased vertical travel which is a linear function of applied force. An accurate and easily controlled method t... | 01/05/1993 |
| 5061832 | Field settable differential pressure switch assembly for low fluid pressure applications A differential pressure switch assembly for low pressure applications permitting accurate "in field" set pointing of same, comprising a capsulized instrument that includes housing high and low pressure sections defining in assembled relation a pressure ca... | 10/29/1991 |
| 4543457 | Microminiature force-sensitive switch A microminiature switch for digitizing different-valued external conditions, such as pressure, temperature of acceleration, is disclosed. The switch includes a silicon wafer having a deflectable, reduced-thickness membrane adapted to move from a relaxed p... | 09/24/1985 |
| 4153181 | Liquid dispenser A unit for dispensing water from a bottle. The parts of the unit include an air pump for pressurizing the bottle, a microswitch having a control button connected in circuit with the pump, a small pressure chamber with a distensible diaphragm for a top, a ... | 05/08/1979 |
| 4103124 | Plug-in pressure switch An air pressure instrument embodying a base receptacle adapted to be mounted to an instrument panel and to be connected to air and electric lines at the panel and a plug-in receptacle containing a pressure-responsive element and switch operable thereby ad... | 07/25/1978 |
