Did You Know...
...that the Eveready Battery began as an invention called the "electric flowerpot," which was a tube with a battery and light bulb inside? The idea was to fasten this gizmo to the side of a flowerpot so it would illuminate the flowers from the bottom. The idea died on the vine and the businessman who licensed the flower pot, Conrad Huber, was left with a pile of useless tubes -- until he found a way to market them as batteries to light the world!
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| Number | Title | Issue Date |
| 7453049 | Snap action mechanism and pressure switch using snap action mechanism A pressure switch includes an external force transmission mechanism for separating a cover from a housing. The cover and the external force transmission mechanism defines a first pressure chamber, and the housing and the external force transmission mechanism defines... | 11/18/2008 |
| 7351926 | Rotation-proof enclosure for pressure switch housing A housing for a pressure switch is coupled to a pipeline. The housing has a tubular body with an explosion-proof enclosure attached to the body with a retainer sleeve inserted through an opening in the enclosure and threaded into the body to secure the enclosure to ... | 04/01/2008 |
| 7213464 | System for visually monitoring pressure in an enclosed space A compliant balloon having an outer reflective surface which is positioned next to a transparent window which has an opaque element thereon, the reflection of the opaque element from the outer reflective surface of the balloon being visible when the outer reflective... | 05/08/2007 |
| 7161460 | Switching element provided with a foil construction A switching element provided with a foil construction includes a first supporting foil and a second supporting foil that are kept at a distance from one another via a spacer. The spacer has a recess in at least one active area of the switching element. A contact arr... | 01/09/2007 |
| 7112753 | Pressure switch A water pressure switch employs two pivotable plates and springs to control the activation of the pump. The arrangement of the two pivotably plates, the springs and the activation device reduces the space required so that a small box can accommodate all the parts. | 09/26/2006 |
| 6633010 | Compact, sealed pressure switch A pressure switch 1 of this invention comprises a base electrode 2, a terminal 3, a disc 4 and a diaphragm 5. The base electrode 2 has a switching chamber 7 for inserting the contact part 3a of the terminal 3. The switching chamber 7 is sealed with an ins... | 10/14/2003 |
| 6621021 | Differential pressure switch and sensor A differential pressure switch having a piston which is guided in a piston housing in a cylinder bore against the force of a return element, the piston head having a pressure P1 applied to it, while a bore space around its tapered piston shaft ... | 09/16/2003 |
| 6522252 | Pressure sensor and door opening/closing monitoring system A pressure sensor 10 has a sensor chip 14 attached in a package 13 formed with a stem 11 and a cap 12 bonded at open surface sides thereof. On both sides of a diaphragm 14a of the sensor chip, pressures are applied via a measurement pressure introducing t... | 02/18/2003 |
| 6517342 | Device for igniting fuel A device for igniting fuel, comprising at least one burner, the device comprising ignition means comprising an ignition element, the ignition means further comprising a movable element which is connected to a fluid line, such that a fluid contained in the... | 02/11/2003 |
| 6452122 | Pressure sensing device An improved differential pressure switch has its supply pressure (a.k.a. the "high side") connected to the high pressure side of a filtration unit and its downstream (a.k.a. the "low side") connected to the low pressure port of a fluid filtration unit. As... | 09/17/2002 |
| 6420668 | No-float pump switch A control apparatus for turning on and off an electrical load device which includes an enclosure having open top and bottom ends with a flexible member searingly connected inside the enclosure, the flexible member having top and bottom sides. A drive magn... | 07/16/2002 |
| 5744770 | Indicating apparatus for indicating a vacuum An indicating apparatus for indicating a vacuum, particularly for indicating the vacuum on the filtered-air side of an air filter for an internal-combustion engine, including a housing and a piston which is movably disposed in the housing and which separa... | 04/28/1998 |
| 5718822 | Differential pressure apparatus for detecting accumulation of particulates in a filter An apparatus and a method are provided for detecting accumulation of particulates in a fluid stream. A differential pressure switch is incorporated in the apparatus for detecting changes in pressure in the fluid stream passing through a strainer having a ... | 02/17/1998 |
| 5661278 | Pressure responsive apparatus couples by a spring-loaded linearly moving carrier to operate a switch unit A miniature pneumatic switch apparatus has a diameter of three-eights inches and a height of five sixteenths inches and operates from minimal pressure to 100 psi. A pressure responsive unit includes outer spaced guide walls extending from a pressure movab... | 08/26/1997 |
| 5619022 | Pneumatic snap action switch A miniaturized pneumatic snap action switch includes a glass or metallized ceramic body that has a convoluted metal diaphragm closing the open end with a glass to metal seal. The interior of the switch is provided at a desired pressure by a sealable tubul... | 04/08/1997 |
| 5586386 | Sensor for use with air bag inflator and method for making A pressure responsive sensor 10 for use with a vehicular air bag inflation system is shown having an electric switch 24 actuatable by a snap acting disc 40 when the gas pressure in the gas storage bottle 48 decreases to a selected low level. The snap acti... | 12/24/1996 |
| 5504288 | Sensor for use with air bag inflator and method for making A pressure responsive sensor 10 for use with a vehicular air bag inflation system is shown having an electric switch 24 actuatable by a snap acting disc 40 when the gas pressure in the gas storage bottle 48 decreases to a selected low level. The snap acti... | 04/02/1996 |
| 5496062 | Liquid-fueled device to combine the functions of a low pressure switch (LPS), squib, and gas generator Featured for use with a hybrid air bag inflator containing inert stored gas under high pressure is a liquid fueled construction which combines the functions of an initiator, gas generator, and differential low pressure switch into a single device. Instead... | 03/05/1996 |
| 5429387 | Low pressure switch/initiator/gas generator A single device acts as a pressure switch, gas generated heater, and an igniter. The device has pyrotechnic material such as a combustible gas in an inner chamber. An outer chamber, that is, a chamber in which the device is positioned, includes a gas that... | 07/04/1995 |
| 5285652 | Sensor for pressure controlled switching valve for refrigeration system A refrigerant flow switching device for alternately conveying refrigerant from a high pressure and a low pressure evaporator to a compressor of a refrigeration system, and a refrigerator using such a refrigeration system, includes a refrigerant flow switc... | 02/15/1994 |
| 5119066 | Pressure sensor system A pressure sensor that responds to a predetermined rate of change of pressure in the fluid medium comprises a housing that encloses a pressure chamber which has a divider wall that consists of a printed circuit board and a flexible diaphragm which is perm... | 06/02/1992 |
| 5089674 | Hydrostatic pressure sensor A hydrostatic pressure sensor, one use for which is to initiate the automatic deployment of emergency marine safety equipment, when a specified depth below the water level is exceeded. The sensor uses a novel method of compensating for ambient air tempera... | 02/18/1992 |
| 5081328 | Flow switch A flow switch with a pressure sensing negative rate membrane. The membrane is designed for integral operation with a venturi element and an actuator. The membrane is a snap action device which, when a differential pressure is sensed, deflects from one pos... | 01/14/1992 |
| 5055826 | Pressure sensor system A pressure sensor that responds to a predetermined rate of change of pressure in the fluid medium comprises a housing that encloses a pressure chamber which has a permeable wall and flexible diaphragm that separates the pressure chamber from the pressure ... | 10/08/1991 |
| 5050634 | Very low differential pressure switch A very low differential pressure switch for detecting pressure differential across two points of a pressurized system. A flexible diaphragm divides two cavities which are exposed to fluid pressures across two points of the pressurized system, and moves a ... | 09/24/1991 |
| 4975679 | Pressure sensor system A pressure sensor that responds to a predetermined rate of change of pressure in the fluid medium comprises a housing that encloses a pressure chamber which has a permeable wall and flexible diaphragm that separates the pressure chamber from the pressure ... | 12/04/1990 |
| 4951810 | Fluid control device for electrical switch unit A control device, switch unit therefor and methods of making the same are provided, the electrical switch unit comprising a switch having a movable actuator, a lever pivotally carried by the switch unit and having one end adapted to be operatively interco... | 08/28/1990 |
| 4914264 | Control device having a self-supporting switch unit therein A control device, switch unit therefor and methods of making the same are provided, the electrical switch unit comprising a switch having a movable actuator, a lever pivotally carried by the switch unit and having one end adapted to be operatively interco... | 04/03/1990 |
| 4718575 | Apparatus for ascertaining the level of flowable material in dust separators and the like The hoppers of several dust precipitators are connected to a common readily accessible monitoring station by discrete conduits each of which has a first open end at a preselected level in the respective hopper, a second open end at the monitoring station ... | 01/12/1988 |
| 4587903 | Tripping system for electrical percussion fuses An ignition system for projectiles, such as shells, bombs, or rockets is disclosed. The system has a pressure chamber defined by a double-diaphragm switch and a cap of a deformable material. The diaphragm of the double-diaphragm switch, which defines one ... | 05/13/1986 |
| 4473729 | Pressure responsive switch A sealed pressure-responsive switch is manually resettable and trip-free. The switch has a separate snap-acting, bistable, dished metal disc or disc element disposed between a sealed snap-acting pressure-responsive diaphragm and a spring-biased switch arm... | 09/25/1984 |
| 4446614 | Method of manufacturing a control device A method of manufacturing a control device includes interconnecting a switch segment with a terminal and another switch segment and mounting a plurality of electrical circuit elements within a housing with contact sections of the electrical circuit elemen... | 05/08/1984 |
| 4445341 | Automatic switching system for car cooler An automatic switching system for car cooler is disclosed. In consideration of the fact that the maximum load is imposed on an engine in acceleration period and the vacuum pressure is introduced to a diaphragm room and a diaphragm enforced by a spring member i... | 05/01/1984 |
| 4433219 | Differential pressure switch with square diaphragm plate supported by the diaphragm A miniaturized differential pressure switch comprising a pair of matched square housing sections with a square diaphragm supporting a flat square diaphragm plate which bears against a compression spring that is flexed to open an electrical contact in depe... | 02/21/1984 |
| 4357748 | Fluid flow sensing switch device method of making the same A fluid flow sensing switch device having a housing provided with a fluid flow passage therethrough defined by an inlet and an outlet separated by a valve seat controlled by a movable valve member that is operated by the pressure differential between the ... | 11/09/1982 |
| 4356625 | Fluid flow sensing switch device--method of making A fluid flow sensing device having a housing provided with a fluid flow passage therethrough defined by an inlet and outlet separated by a valve seat controlled by a movable valve member that is operated by a pressure differential between the inlet and th... | 11/02/1982 |
| 4342884 | Piston unit A small-sized differential piston unit is disclosed. The piston unit has a cylinder filled with liquid medium and a piston slideably mounted in the cylinder. An operation rod is operatively connected to said piston. An improved sealing member consisting o... | 08/03/1982 |
| 4309149 | Vacuum pump switch A sensor responsive to a differential pressure between a fluid in a reservoir and the surrounding environment for operating a switch to activate and deactivate a pump and maintain the pressure of the fluid in the reservoir within a predetermined range.... | 01/05/1982 |
| 4304546 | Fluid flow sensing switch device and method of making the same A fluid flow sensing switch device having a housing provided with a fluid flow passage therethrough defined by an inlet and an outlet disposed in spaced coaxially aligned relation in the housing and separated by a valve seat controlled by a movable valve ... | 12/08/1981 |
| 4297687 | Leak detection apparatus A leak detection apparatus (18) is provided in a pressurized assembly (10) to signal a loss of pressure or vacuum downstream from a source of pressure or vacuum. A rod (60,160,260) is carried on a valve (62,162) and a diaphragm (38,138) which seals the so... | 10/27/1981 |
