Pointer instrument

Details Pointer instrument Pointer instrument

2007-06-19

2011-11-15

Raevis, Robert R (Department: 2856)

Measuring and testing

Instrument proving or calibrating

Speed, velocity, or acceleration

Reexamination Certificate

active

08056388

ABSTRACT:
A pointer measuring instrument capable of indicating “zero” on an indication panel by a pointer even if a play (backlash) is present in gears. The measuring instrument comprises a pointer reference position setting means (7a,7b) for determining the reference position of the pointer (4). A control means (6) rotates the pointer (4) in the direction toward the reference position when a power supply to a stepping motor (2) is turned on, and performs a first drive for stopping the rotation of the pointer (4) when it receives a pointer reference position arrival signal from the pointer reference position setting means (7a). Then, the control means performs a second drive for moving the pointer (4) by a first angle from the reference position in the reverse direction away from the reference position, and performs a third drive for rotating the gear (3S) of a reduction mechanism (3) on the stepping motor (2) side by a second angle.

REFERENCES:
patent: 5469137 (1995-11-01), Muto
patent: 2006/0144172 (2006-07-01), Sasaki
patent: 4-123498 (1992-11-01), None
patent: 06-129877 (1994-05-01), None
patent: 2001-314099 (2001-11-01), None
patent: 2003-130694 (2003-05-01), None
patent: 2006-064437 (2006-03-01), None

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