Electrical computers: arithmetic processing and calculating – Electrical digital calculating computer – Having specialized input
Patent
1998-01-08
1999-10-05
Ngo, Chuong Dinh
Electrical computers: arithmetic processing and calculating
Electrical digital calculating computer
Having specialized input
178 1801, 341 5, G06F 300
Patent
active
059615745
ABSTRACT:
A device (10) for obtaining information relating to the relative positions of first and second members (11, 12), the first member (11) comprising at least three isolated electrically conducting parts (13-16), and the second member (12) being electrically conducting and adjacent to and capacitively coupled to the first member (11), the first and second members (11, 12) being relatively movable such that the proportions of each of the respective parts (13-16) of the first member (11) in overlapping relationship with the second member (12) may be varied, oscillator means (25) to provide a first waveform signal (26) to one of the parts (13-16) of the first member (11) and a second waveform signal (27) to another of the parts (13-16) of the first member (11), means (40) to analyze a signal arising in the capacitively coupled second member (12) to provide a device output signal (50) containing positional information and characterized in that a switch means (31) is provided whereby when the switch means (31) is in a first condition the first waveform signal (26) is selectively applied to a first part (16) of the first member (11) while the second waveform signal (27) is applied to a second part (15) of the first member (11) so that the device output signal (50) contains information relating to the relative positions of the first and second members (11, 12) in a first direction (33), and when the switch means (31) is in a second condition the first waveform signal (26) is applied to another part (14) of the first member (11) while the second waveform signal is applied to another one of the parts (15) of the first member so that the device output signal (50) contains information relating to the relative positions of the first (11) and second (12) members in a second direction (34).
REFERENCES:
patent: 4743902 (1988-05-01), Andermo
patent: 4879556 (1989-11-01), Duimel
patent: 5736865 (1998-04-01), Nelson et al.
patent: 5872408 (1999-02-01), Rakow
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