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...that Kleenex tissue was originally designed to be a gas mask filter? It was developed at the beginning of World War I to replace cotton, which was then in short supply as a surgical dressing.
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| Number | Title | Issue Date |
| 6909374 | Level/position sensor and related electronic circuitry for interactive toy A sensor for use in an interactive electronic device. The sensor comprises a base member having at least one recess formed therein which is partially defined by a peripheral wall thereof. Disposed within the peripheral wall of the base member is at least one switch.... | 06/21/2005 |
| 6659895 | Motion sensor for use with a bicycle sprocket assembly A sensor retainer for a bicycle sprocket assembly includes an annular member for mounting and rotating coaxially with the bicycle sprocket assembly and a sensor element fixed to the annular member. Alternatively, the sensor retainer may include a fixing m... | 12/09/2003 |
| 5744720 | Rolling bearing unit with rotating speed detector The sensor 20a has first and second permanent magnets 31, 32, stator 33 and coil 24. The first and second permanent magnets 31, 32 has an inner peripheral face formed with south and north poles circumferentially and alternately with a uniform space thereb... | 04/28/1998 |
| 5633062 | Method of manufacturing rotation sensor and structure of rotation sensor A method of manufacturing a rotation sensor can effectively prevent a sensor element from moving during a resin molding process for forming a resin portion that covers the sensor element to provide excellent waterproofness and airtightness. During a first... | 05/27/1997 |
| 5495762 | Pendulum acceleration sensor A pendulum acceleration sensor includes a plate-like pendulum, at least a pair of detection sensors, and a holder unit. The pendulum swings about a shaft in a direction parallel to the side surfaces of the pendulum in accordance with an acceleration. The ... | 03/05/1996 |
| 4973905 | Eddy current measuring device with flux return element In an eddy-current measuring device, a permanent magnet (2) which is arranged fixed for rotation on a drive shaft (1) is magnetized axially. An eddy-current element (4) has the shaped of a disk and is located with slight axial spacing from the permanent m... | 11/27/1990 |
| 4818926 | Tachometric device driven by an electric motor A tachometric device is provided with a D.C. electric motor a shaft of which drives a pair of permanent magnets to rotate. A first permanent magnet controls a speed indicator unit; a second permanent magnet is rotatably mounted within a winding the termin... | 04/04/1989 |
| 4815322 | Speed indicator device for vehicles A speed indicator device for vehicles is described, of the type in which the speed indication is given over a scale by an index fitted to an oscillating element drawn for example, by a permanent magnet carried into rotation by the shaft of an electric mot... | 03/28/1989 |
| 4371834 | Device for measuring the frequency of an electrical current representative of a variable quantity A device to make a measurement of a variable quantity such as the speed of rotation of a first shaft or the speed of operation of an ignition system of an engine, wherein electrical pulses are produced at a frequency which is a function of the speed. The ... | 02/01/1983 |
| 4241607 | Tachometer device controlled by an electric motor A device (1) for transmitting rotary motion from a first to a second shaft and for measuring the angular speed of said rotary motion, comprising a first and second pulse generator associated respectively with said first and second shaft, and governing, by... | 12/30/1980 |
| 4186609 | Eddy-current device for measuring rotational speed An eddy-current speedometer having a rotatably driven permanent magnetic element and a cooperating eddy-current rotary element provided with an indicating device and mounted to rotate coaxially therewith and be set rotating by alternating magnetic fields ... | 02/05/1980 |
| 4133407 | Vehicle speed controller A manually controlled set-speed-selector on the speedometer of a vehicle causes a pair of normally open electrical contacts to close when the speedometer indicator needle reaches the set point. This actuates a solenoid valve which applies intake manifold ... | 01/09/1979 |
| 4095553 | Speedometer with an exceeding speed warning device A lever fixed to a metal cap or speed cup of a speedometer is vibratably engageable with projections provided on a rotating ring member when a speed pointer rotatable with the metal cap deflects beyond a predetermined maximum index, so that the speed poin... | 06/20/1978 |
| 3999441 | Presettable speedometer for automotive vehicle A drum angularly entrained via a magnetic coupling by a shaft of a vehicular transmission, against a spring force, is linked via another magnetic coupling with a coaxial follower member carrying a printed circuit whose conductors are engageable by respect... | 12/28/1976 |
| 3995499 | Eddy-current meter An eddy-current meter comprises a permanent magnet fixed for rotation with a shaft whose rotation speed is to be measured. A metal cup is disposed close to the permanent magnet and attached to a spindle carrying a pointer. The spindle is rotatable against... | 12/07/1976 |
| 3995248 | Variable resistance device A variable resistor includes a low-friction contact such as a ball or roller, which may be stabilized by a magnet or trough.... | 11/30/1976 |
| 3934478 | Magnet shaft assembly for speedometer and odometer A speedometer magnet shaft assembly having a plastic magnet shaft and integrally formed annular wall moldably secured to the magnet and flux collector. A helical gear is moulded on the annular wall for transmitting movement to the odometer. The molded mag... | 01/27/1976 |
