| 摘要 |
1,111,529. Measuring fluid flow. AMERICAN RADIATOR & STANDARD SANITARY CORPORATION. July 9, 1965 [July 29, 1964], No. 29137/65. Heading G1R. In a mass fluid flow measuring device comprising a first duct 20 leading to a second duct 22 of larger diameter swirling means 26 such as fixed blades 26 impart a swirl condition to the fluid the centre of which swirling fluid precesses around the centre line of the device and the arrangement is such that a sensor 28 senses the frequency and amplitude of fluid precession from which the mass flow of the fluid is measured. |
