Apparatus and a method for indicating measurements with an analog display and a pointer unit thereof
AssigneeSeiko Epson Corporation
InventorsMasaru Kubota, Keiichiro Oguchi, Takashi Kawaguchi, Hidenori Nakamura
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Abstract
A current measured value measured by sensor is indicated by a measured value pointer. A maximum or minimum value pointer is interlocked with the measured value pointer and moves only in an incremental or decremental direction to indicate the maximum or minimum measured value. Therefore, a current measured value and the maximum or minimum value can be indicated simultaneously by a single drive source.
Claims32
An analog display measuring instrument comprising:
- a sensor for measuring a value of a sensed characteristic;
- a measured value pointer for indicating a current value measured by said sensor;
- a maximum or minimum value pointer indicating one of a maximum or minimum measured value respectively;
- a common drive source
- a gear train driven by said common drive source to move said measured value pointer and to move said maximum or minimum value pointer only in one of an incremental or decremental direction respectively;
- the gear train including a disengageable linkage member which couples movement of the measured value pointer to movement of the maximum or minimum value pointer as the measured value pointer is being increased from the value of the maximum value pointer or decreased from the value of the minimum value pointer and decouples movement of the measured value pointer and the maximum value pointer when the measured value pointer is being increased below the value of the maximum value pointer or is being decreased above the value of the minimum value pointer;
- and
- a control for controlling said drive source to move said measured value pointer to a position corresponding to a measured value obtained by said sensor.
A pointer unit in an analog display measuring instrument having a sensor for measuring a value of a sensed characteristic, the pointer unit comprising:
- a measured value pointer for indicating a current measured value, a maximum value pointer to be placed at the maximum measurement position for indicating the maximum measured value, a common drive source for driving said measured value pointer and maximum value pointer;
- and a gear train driven by said common drive source to move said measured value pointer and to move said maximum value pointer only in an incremental direction, the gear train including a disengageable linkage member which couples movement of the measured value pointer to movement of the maximum value pointer as the measured value pointer is being increased from the value of the maximum value pointer and decouples movement of the measured value pointer and the maximum value pointer when the measured value pointer is being increased at a value below that of the maximum value pointer.
A pointer unit in an analog display measuring instrument having a sensor for measuring a value of a sensed characteristic, the pointer unit comprising:
- a measured value pointer for indicating a current measured value, a minimum value pointer to be placed at the minimum measurement position for indicating the minimum value, a common drive source to drive said measured value pointer and said minimum value pointer;
- and a gear train driven by said common drive source to move said measured value pointer and to move said minimum value pointer only in a decremental direction, the gear train including a disengageable linkage member which couples movement of the measured value pointer to movement of the minimum value pointer as the measured value pointer is being decreased from the value of the minimum value pointer and decouples movement of the measured value pointer and the minimum value pointer when the measured value pointer is being decreased at a value above that of the minimum value pointer.
Dependencies are inferred from the claim text.