"The Americans have need of the telephone, but we do not. We have plenty of messenger boys."
Sir William Preece, chief engineer, British Post Office ; 1878
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| Number | Title | Issue Date |
| 7357033 | Manual resuscitators with integral manometer A manometer integrated into a manual resuscitator includes a housing with a communication path, and a pressure gauge integrally forming part of the housing. A sensing chamber and an atmospheric chamber are separated by a diaphragm subject to distortion by differenti... | 04/15/2008 |
| 7246825 | Erosion-indicating safety fitting An erosion-indicating safety fitting having a fluid passage formed within for connection in-line with a pipe and a cage of interconnecting breach passages formed into the block and surrounding the fluid passage, particularly at areas having a predicted risk of erosi... | 07/24/2007 |
| 7234356 | Shock resistant blood pressure measuring apparatus A pressure measuring apparatus includes a gage that is at least partially imbedded within a flexible elastomeric member disposed within an interior cavity of a device housing. A shock resistant member into which the gage is inserted permits fluid interconnection bet... | 06/26/2007 |
| 7165461 | Pressure gauge having dual function movement plate A pressure gauge comprising a stem having an inlet at which pressure is sensed. A Bourdon tube is coupled to the stem and is displaceable in response to pressure changes at the inlet. A movement comprising a movement plate conducts displacement of the Bourdon tube t... | 01/23/2007 |
| 7051596 | Manual resuscitators with integral manometer A manometer integrated into a manual resuscitator includes a housing with a communication path, and a pressure gauge integrally forming part of the housing. A sensing chamber and an atmospheric chamber are separated by a diaphragm subject to distortion by differenti... | 05/30/2006 |
| 7040152 | Pneumatic tire air pressure gauge assembly A compact air pressure gauge assembly mountable to the valve stem of a inflatable tire or mountable through the rim of a wheel for continuous monitoring of the tire inflation pressure. The air pressure gauge assembly has a compact design to extend the valve stem or ... | 05/09/2006 |
| 7021610 | Ring shaped spring device A spring device comprising at least one annular support plate defining a ring with a central axis; a plurality of circumferentially spaced, parallel oriented coil springs disposed about the at least one annular plate; and, a plurality of lock assemblies spaced about... | 04/04/2006 |
| 6679122 | Pressure gauge having a dampener mechanism with attachable housing A dampening apparatus for a pressure gauge in which a housing secured to the amplifier of the pressure gauge encircles the pointer shaft in a close but loose fit relation so as to define a controlled clearance packed with a high viscosity dampening agent ... | 01/20/2004 |
| 6651507 | Pressure gauge having a dampener mechanism Various embodiments are disclosed of dampening apparatus for a pressure gauge in which a short length of sleeve, ferrule, hub or thimble encircles a pointer shaft in a close but loose fit relation defining a clearances packed with a high viscosity dampeni... | 11/25/2003 |
| 6190049 | Fluid thrust bearing for indicating instruments and the like The present invention is a novel fluid thrust bearing system and method for assembling the same. When used in an indicating instrument, the fluid thrust bearing of the present invention reduces the number of necessary parts and simplifies assembly when co... | 02/20/2001 |
| 6119525 | Pressure gauge having dampener mechanism Dampening apparatus for a pressure gauge in which a short length of sleeve, ferrule, hub or thimble encircles the pointer shaft in a close but loose fit relation and is packed with a high viscosity fluid such that it will serve to decelerate and cushion a... | 09/19/2000 |
| 5311780 | Oil-filled pressure gauge leak-stoppage device Disclosed is an oil-filled pressure gauge leak-stoppage device including a rivet-like rubber gasket and a metal gasket respectively mounted on a plane on the peripheral wall of the casing around an axle hole thereof to seal the gap between the casing and ... | 05/17/1994 |
| 5303587 | Diver's depth gauge The present invention comprises an oil-filled depth gauge which is made far less sensitive to violent shock and the potential resulting inaccuracies to the maximum depth gauge indicator from such shock. More specifically, the present invention comprises a... | 04/19/1994 |
| 4738141 | Pressure sensor An improved pressure sensor includes a Bourdon tube, as its sensing element, and an indicator controlled thereby. At least one tightly closed container is secured to a free end of the Bourdon tube and is partly filled with a bulk material. If the Bourdon ... | 04/19/1988 |
| 4531416 | Pressure transducer A linear variable differential transformer pressure transducer includes a pressure sensing element which is deformed in response to changes in the pressure of a fluid. The pressure sensing element is connected to the core of a differential transformer, th... | 07/30/1985 |
| 4444057 | Movement construction for condition responsive gauge instrument An improved movement construction for a condition responsive gauge instrument to transmit displacement motion with reduced backlash from a condition responsive element to an output drive. A first embodiment comprises a spring grip between the segment gear... | 04/24/1984 |
| 4246796 | Pressure gauge construction A pressure gauge in which the amplifier communicating displacement motion of the pressure responsive element to the pointer indicator, is mounted in a spring suspension isolating it from the force transmitting rigid components of the gauge. The spring sus... | 01/27/1981 |
| 4192193 | Liquid filled pressure gauge A pressure gauge has a Bourdon tube element and a pointer mechanism supported on an inner support member which is substantially contained inside the case body of the gauge. The inner support member has a bore in communication with the inner space of the B... | 03/11/1980 |
| 4154116 | Safety manometer The front edge (2) of a manometer casing (1) is curved inwardly and secures the window shield (3), located in a sealing ring (5), against being pushed out upon superatmospheric pressure in the housing. A partition (17), in which slotted holes (18, 20, 21)... | 05/15/1979 |