Measuring and testing – Volume or rate of flow – By measuring vibrations or acoustic energy
Patent
1991-11-13
1994-08-09
Chin, Stephen
Measuring and testing
Volume or rate of flow
By measuring vibrations or acoustic energy
29837, 439 76, G01F 132
Patent
active
053355539
ABSTRACT:
A fluidic gas meter including a flow path structure provided with a fluidic element, a cut-off valve, a pressure switch, a flow sensor, a piezoelectric film sensor, an electronic circuit unit, and a wiring board serving as a mother board and having a function of lead wires. Each of the cut-off valve, the pressure switch, the flow sensor and the piezoelectric film sensor are fixed to the flow path structure. The electronic circuit unit is made up of a counter board and a control circuit board. The counter board is mounted with an electronic circuit for counting up flow-rate signals from the flow sensor and the piezoelectric film sensor and a liquid crystal display device for displaying the amount of gas consumed. The control circuit board is mounted with a control circuit for controlling the cut-off valve, wherein each of the cut-off valve, the pressure switch, the flow sensor, the piezoelectric film sensor and the electronic circuit unit is provided with a plurality of terminals extending perpendicularly to the wiring board. The wiring board is provided with a printed circuit for the interconnection among the terminals. The wiring board has a plurality of V-shaped guide grooves formed therein for receiving the terminals and guiding the terminals to through holes formed at an apex of the V-shape of the guide grooves, wherein the terminals form an electrical connection with the printed circuit of the circuit board, thereby avoiding wiring errors.
REFERENCES:
patent: 4550614 (1985-11-01), Herzl
patent: 4610084 (1986-09-01), Anderson et al.
patent: 4674182 (1987-06-01), Igarashi
patent: 4886227 (1989-12-01), Matl
patent: 4932873 (1990-06-01), La Shier
patent: 5157974 (1992-11-01), Hattori et al.
Kamiya Hideo
Kanda Koichi
Sakai Katsuhito
Ueki Takashi
Aichi Tokei Denki Co., Ltd.
Chin Stephen
May Timothy J.
Tokyo Gas Co. Ltd.
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