Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1988-07-12
1990-05-22
Swann, III, Glen R.
Communications: electrical
Condition responsive indicating system
Specific condition
74435, 74436, 74 892, 74DIG7, 340540, G08B 2100
Patent
active
049280910
ABSTRACT:
In an apparatus for detecting a position of a table, the table moves along a first track having a target position located within a predetermined range. The position detecting apparatus has a movable member and a detecting mechanism. The movable member is movable along a second track. The detecting mechanism detects the movable member when it reaches a predetermined point on the second track. The detecting apparatus further has a transmission mechanism for transmitting the movement of the table to the movable member. The transmission mechanism transmits the movement of the moving object to the movable member at a first transmission ratio moving distance of the movable member/moving distance of the table when the table passes within the predetermined range on the first track, and at a second transmission ratio smaller than the first transmission ratio when the table passes outside the predetermined range on the first track. When the table reaches the target position on the first track, the movable member reaches a predetermined point on the second track, and thus it is detected that the moving object has reached the target position. It can be detected with high precision that the table has reached the target position without increasing the size of the detecting apparatus.
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Kabushiki Kaisha Toshiba
Swann III Glen R.
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