| Patent Number |
Title Of Patent |
Date Issued |
| 5398676 |
Portable emergency respirator |
March 21, 1995 |
| A portable emergency respirator which contains an electrical power supply, a source of compressed air, and a switch which allows one to produce three separate different types of pneumatic outputs from the source of compressed air. In one mode of operation, the output from the source of |
| 4555951 |
Reflective acoustic fluid flow meter |
December 3, 1985 |
| In one embodiment, a first air flow meter includes a pair of ultrasonic transducers mounted on one wall of a conduit, and an opposite reflective wall is shaped to focus acoustic signals from one transducer to the other. In a second embodiment, the opposite wall is separated into a steppe |
| 4527433 |
Method and apparatus for measuring fluid flow |
July 9, 1985 |
| A fluid flow meter and, more especially, an airflow meter having fast response and very high resolution uses piezoelectric transducers operating near resonance to pass ultrasonic signals upstream and downstream alternately in a flow passage. Transmission signals continue longer than |
| 4527432 |
Dual frequency acoustic fluid flow method and apparatus |
July 9, 1985 |
| An acoustic fluid flow meter determines the flow velocity or volumetric flow from a measurement of the phase shift of acoustic signals propagated upstream and downstream along an acoustical path in the fluid. High resolution measurements of the phase difference of transmitted and rec |
| 4476711 |
Combined vibration and temperature sensor |
October 16, 1984 |
| A combined vibration and temperature sensor for an internal combustion engine comprises a piezoelectric disc in mechanical and thermal contact with an engine throttle body and connected electrically in series with an impedance effective to form a voltage divider having a predetermined |
