Recording apparatus
AssigneeMitogiken, Ltd.
InventorKeigo Kobayashi
Life of this patent
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Abstract
Herein disclosed is a battery-operated, dot type recording apparatus which comprises a drive mechanism unit having its number of revolutions regulated by the output of a quartz oscillator, a circuit for connecting a d.c. power source with a meter only when a measured value is to be recorded, and delay switching means for causing the tip of a pointer of a meter to hit the recording paper at the time when that meter becomes stable. Thus, the dot type recording apparatus is so constructed of a small number of mechanical means that it can reliably operate for a long time, while having its adjustment and maintenance facilitated, with little influence from changes in circumstances.
Claims11
A dot type recording apparatus, which has a power source, and dotting means and recording paper feed means, both being operated by said power source, and in which recording is executed by said dotting means causing a pointer of a meter, opeated by a measuring instrument that produces a measurement signal, to hit the recording paper,
- wherein the improvement comprises:
- said power source being a D.C. power source;
- amplifier means powered by said power source and connected as a pre-amplifier with said meter for amplifying the measurement signal;
- an oscillator powered by said power source;
- said recording paper feed means including a dot type recording paper feed drum and drive means powered by said oscillator for rotating said drum and moving the paper past said pointer;
- switch means periodically closing for a fixed interval in response to rotation of said drum by said drive means for providing from said D.C. power source to said amplifier only when closed;
- delay switching means connected in parallel with said amplifier to receive power from said power source only when said switchmeans is closed and for generating an output when a fixed time period elapses after it is energized from said power source through said switch means;
- solenoid means connected to be energized by the output of said delay switching means for moving said pointer of said meter to hit the recording paper when energized;
- and
- said delay switching means thereby permitting said amplifier and meter to stabilize prior to recording, and said switch means being closed for only a small period of time during operation of said oscillator means for conserving the energy of said power source.
Dependencies are inferred from the claim text.