Did You Know...
...that the first rickshaw was invented in 1869 by an American Baptist minister, the Rev. E. Jonathan Scobie, to transport his invalid wife around the streets of Yokohama?
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| Number | Title | Issue Date |
| 7348509 | High pressure switch with isolated contacts A pressure switch employs electrical contacts isolated from pressure media. By employing a snap action blade in a snap over center configuration, it is possible to provide a hysteresis effect in which the switch actuates at one pressure and deactuates at a different... | 03/25/2008 |
| 7308829 | Differential pressure indicator and method of manufacture A differential pressure indicator and method of configuring a differential pressure indicator is provided. The differential pressure indicator is configurable to provide open circuit or closed circuit logic and includes a housing, a pressure responsive element, a po... | 12/18/2007 |
| 7238903 | Electrical switching apparatus operating mechanism with operating member therefor, and enclosure assembly employing the same An operating mechanism is for a circuit breaker housed by an enclosure assembly including a panel movable between a closed position and an open position. The operating mechanism includes a linkage and an operating member. The operating mechanism is coupled to the ha... | 07/03/2007 |
| 7098412 | Pressure activated latching switch A structure embodying a switch and method of operating thereof for creating a latching switch is disclosed. The latching switch utilizes an electrorheologic fluid and the electronic latch function thereof is actuated by a pressure signal and deactivated by the remov... | 08/29/2006 |
| 7093451 | Blowoff valve assembly with integrated pressure switch A blowoff valve assembly includes a diaphragm separating a refrigerant connection from an ambient port open to the atmosphere. The refrigerant connection is preferably connected to air conditioning system such that the diaphragm is in contact with refrigerant from t... | 08/22/2006 |
| 7071430 | Adjustable pressure element, particularly for electric household appliances The sensor comprises a body in which a diaphragm is mounted so as to define a variable-volume chamber to which a fluid pressure is supplied in use, and a plurality of electrical switches connected to the diaphragm so that the diaphragm can bring about switching of t... | 07/04/2006 |
| 6881913 | Pressure operated safety switch A pressure-operated safety switch is applied to a point in the compressed air system, which requires monitoring for presence of pressurized air. Pressurized air is introduced into the switch through a tube or other suitable fitting at the point needing monitoring. T... | 04/19/2005 |
| 6708552 | Sensor arrangement for an integrated pressure management apparatus A sensor arrangement and a method of verificating leaks in a fuel system including an integrated pressure management apparatus. The sensor arrangement comprises a chamber having an interior volume varying in response to fluid pressure in the chamber, a first switch,... | 03/23/2004 |
| 6674029 | Position-detecting apparatus Each of pressure-detecting switches to be connected to one another has a first connector provided at one side section and a first connector provided at the other side section. Electric wiring is mutually effected for the pressure-detecting switches by att... | 01/06/2004 |
| 6443005 | Pressure activated control An improved pressure activated control apparatus is provided for sensing fluid pressure and triggering one or more switches in response to the fluid pressure, as desired. The apparatus includes a first resilient member, such as a pliable rolling diaphragm... | 09/03/2002 |
| 6111331 | Air switch assembly for an electric motor An air switch assembly for an electric motor including a first snap action switch, a second snap action switch, and an actuator, is described. The first snap action switch is connected to the motor start winding and the second snap action switch is connec... | 08/29/2000 |
| 6064014 | Pressure responsive electric switch assembly and method for making As assembly of normally open pressure responsive electric switches (10a-10e) is provided using a single lead frame (8) for forming respective discontinuous annuli (12) to serve as contact surfaces for pressure responsive discs (42) and a center contact (1... | 05/16/2000 |
| 5998745 | Vacuum detection switch A switch detects a vacuum that is created by suctioning air through a port hole in a media support surface. The switch includes a first layer having (i) a first hole therein which is at least partially aligned with the port hole in the media support surfa... | 12/07/1999 |
| 5814779 | Fluid pressure responsive electric switch A fluid pressure responsive electric switch (100) is shown in which first and second discrete electrical switches are controlled. A first movable support ring (122) mounts first and second snap acting discs (120a, 124a) on opposite sides thereof, the disc... | 09/29/1998 |
| 5728986 | Block mounting of pressure switch cartridge A cartridge type pressure switch is formed with a cup-shaped contact flanged outwardly at its rim and slidably nested in an annular spacer. A flexible diaphragm has an integrally formed annular bead ring which is stretched over the spacer to secure the di... | 03/17/1998 |
| 5691702 | Pneumatic pressure detector for fire and ground fault detection Electrical circuitry associated with a pneumatic pressure detector for use in an overheat condition or fire alarm system for aircraft. The pressure detector comprises a plenum situated between a pair of deformable diaphragms and pressurized by a capillary... | 11/25/1997 |
| 5493086 | Monitoring and regulating device for a fluid such as engine oil An engine oil regulating device may monitor and regulate a fluid level for stationary engines or compressors for gravity feed and pressurized oil applications. Oil may be received in a float chamber that may have a safety shutdown float and an oil level r... | 02/20/1996 |
| 5365026 | User interface control apparatus A user interface controller for use by physically challenged persons has multiple function capabilities to operate an electronic device such as a computer or video game system. The controller provides activation of a plurality of first type control device... | 11/15/1994 |
| 5233142 | Snap action electrical switching mechanism with dual set points A first belleville spring, having a given preload, controls a translatable, elongate, contact disc assembly, to cause a shunting disc to remove from, and close into contact with a pair of circuit contacts. The assembly is disposed within a translatable ca... | 08/03/1993 |
| 5155311 | Float switch assembly for submersible pump A magnetically actuated float switch assembly for use with a submersible pump, comprises a float rod with two spaced stops, a movable float carried by the rod which moves between the stops in response to fluid level, the rod being mounted in a vertical or... | 10/13/1992 |
| 5136278 | Compact and lightweight pneumatic pressure detector for fire detection with integrity switch A pneumatic pressure detector for use in an overheat or fire alarm system utilizes a known capillary type sensor tube which has absorbed in it a gas. Overheat or fire condition causes the gas to expand which then actuates an associated deformable diaphrag... | 08/04/1992 |
| 5130502 | Vacuum-controlled switch means responsive to engine load A vehicle switch means includes an electric switch operatively closed or opened as driven by a central spindle controlled by a vacuum controller communicated with an inlet manifold of a car engine, whereby when the car is subject to a heavy load, the weak... | 07/14/1992 |
| 5089673 | Pressure operated electrical switching device with plural lever actuated microswitches An electrical switching device includes a switch plunger which is axially displaceable within a housing and two opposing radially directed rocking levers each disposed on a sharp edge formed on the housing. When pressure is applied to the switch plunger, ... | 02/18/1992 |
| 5078578 | Pneumatic device for detecting hydrometric level A pneumatic device for detecting continuously the hydrometric level of a water column, said device comprising a tubular probe dipped into the liquid column by a height greater than the distance between the two maximum and minimum levels set forth previous... | 01/07/1992 |
| 5034581 | Pneumatic-electric switch apparatus with lock-out feature An apparatus comprising a plurality of electric switches, pneumatic actuators for the switches, assemblies for preventing inadvertent actuation of one or more switches and supports for the elements of the assemblies in coactive relation to each other, in ... | 07/23/1991 |
| 5034577 | Fluid actuated electrical switch The invention concerns an electrical reversing switch, which is especially suited for switching of high-frequency electrodes. This switch has an over mounted pneumatic cylinder, which moves on pistons arranged on both sides, and thus produces electric con... | 07/23/1991 |
| 5034583 | Electric switching device which can be controlled mechanically in an adjustable way An electric switching device for making or breaking the electric continuity between electric connecting elements under the action of an external force includes, in a single case, at least one electric switch having a control member therefor, a movable ope... | 07/23/1991 |
| 5004873 | Plural set point pressure responsive switching apparatus utilizing a single pressure sensing driver element An actuator having a spring biased button abutting a first electric switch operator button and a flange spaced from an operator button of a second electric switch is driven by a pressure sensing bellows against a Belleville snap spring, the actuator movin... | 04/02/1991 |
| 4931604 | Control device A central device has a housing and snap action means for discrete snap action movement between a stable configuration and an unstable configuration thereof. Means is provided in the housing for seating the snap action means, and means is also provided for... | 06/05/1990 |
| 4920240 | Method of operating an electric circuit controlling device A method of operating an electric circuit controlling device with the device having a housing, a seat in the housing, and a snap action member having discrete snap action movement between a stable configuration and an unstable configuration. The snap acti... | 04/24/1990 |
| 4918267 | Vacuum operated circuit breaker A pair of electrical switches are operable by a movable lever between a first condition where the first switch is on and the second switch is off, to a second condition where the first switch is off and the second switch is on, by movement of a piston con... | 04/17/1990 |
| 4892985 | Vacuum responsive multicontact switch A multicontact vacuum responsive switch includes a housing divided into first and second chambers by a diaphragm. The first chamber is connected to a vacuum source while the second chamber communicates with atmospheric pressure, so that the diaphragm is m... | 01/09/1990 |
| 4879440 | Proximity switch for a cylinder A proximity switch for signaling the location of a movable member at either of opposite end limits of movement relative to a stationary frame includes a movable member, such as a piston, traveling along a fixed path of movement between a first position an... | 11/07/1989 |
| 4868356 | Easily serviced fluid pressure operated switch Disconnection of a fluid conduit from a fluid fitting 38 and electrical conduit from apertures 28 in a fluid pressure sensing switch when servicing is required is avoided in a construction wherein a switch module 12 is secured to a base 10 mounting a flui... | 09/19/1989 |
| 4855545 | Pneumatic to electrical switch assembly A multi-stage pressure-to-electric switch assembly includes a top casing provided with a pressure receiving chamber, a bottom casing integrally secured to the top casing in closing relation to the pressure receiving chamber, and a diaphragm clamped betwee... | 08/08/1989 |
| 4853504 | Triple action pressure switch apparatus A triple action pressure switch apparatus includes a housing having a pressurized fluid introducing path, the inner space of which is partitioned into a pressure actuating chamber communicated with the path and a switch mechanism storage chamber by a diap... | 08/01/1989 |
| 4848847 | Pressure supply system especially for brake systems of motor vehicles A pressure supply system for the generation of the auxiliary pressure of a hydraulic brake system for motor vehicles comprises an accumulator, a hydraulic pump driven by electromotive force and a pressure switch (1) controlling the turning on and off of t... | 07/18/1989 |
| 4843364 | Thermostatic electric switch An electric switch, particularly a thermostatic switch, includes contacts connected to at least three terminal members having connector terminals aligned along a common axis.... | 06/27/1989 |
| 4827094 | Dual-action pressure switch apparatus A dual-action pressure switch apparatus has a piston member disposed in a switch mechanism containing chamber sealingly pertitioned by a diaphragm in the inner space of a housing, and being movable in the axial direction of chamber. A high-pressure snap d... | 05/02/1989 |
| 4820890 | Three-function pressure switch A pressure switch for controlling the pressure of a refrigerant has a first switch normally open biased, which first switch is used for a condenser, and a second switch normally closed biased, which second switch is used for a compressor. The three-functi... | 04/11/1989 |
