| 摘要 |
FIELD: instrument making.SUBSTANCE: proposed counter comprises case to accommodate meter run fitted on shaft in crosswise walls and provided with permanent magnet and makeweight, electronic meter run rpm adder with magnetically operated sealed switch. It differs from known designs in that permanent magnet is arranged at meter run end while said magnetically operated sealed switch is fitted on case crosswise wall opening made of nonmagnetic material, opposite the magnet, and connected to adder input. Said adder is composed by electric pulse counter operated by its input short-circuit at making magnetically operated sealed switch contacts by permanent magnet magnetic field.EFFECT: higher reliability, faultless operation, lower costs.1 dwg |
