Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
66 words
A crossed radiant beam x-y coordinate detection and encoder system including a plurality of emitter and detector pairs along each axis comprising: means for scanning a display space with crossed light beams; means for detecting interruption of said light beams; and means for repeatedly reporting coordinates associated with said interrupted light beams which are present over a series of display space scans at preselected scan intervals.
Claim 2
Dependent Claim
66 words
A crossed radiant beam x-y coordinate detection and encoder system including a plurality of emitter and detector pairs along each axis comprising: means for scanning a display space with crossed light beams; means for detecting interruption of said light beams; and means for repeatedly reporting coordinates associated with said interrupted light beams which are present over a series of display space scans at preselected scan intervals.
Claim 3
Dependent Claim
30 words
The system according to Claim 1 wherein the means for detecting the interruption of said crossed light beams is in response to the presence or absence of said AM modulation.
Claim 4
Dependent Claim
48 words
The system of Claim 2 wherein said detection means comprises means for eliminating ambient light interference comprising: means for operating said detectors over a wide dynamic range; and means for detecting the presence or absence of said AM modulation when said detectors are operated within said dynamic range.
Claim 5
Dependent Claim
28 words
The system of Claim 2 wherein said detection means comprises amplifier means coupled to said AM detection means for providing high gain amplification in excess of 40 dB.
Claim 6
Dependent Claim
31 words
The system of Claim 4 wherein said AM modulation detection means further comprises: filter means for eliminating interfering frequency below 1 kHz; and clamping means for eliminating high amplitude noise spikes.
Claim 7
Independent Claim
30 words
The system of any of Claims 1 to 5 wherein said preselected scan intervals comprises an initial first scan interval equal to T1 and subsequent scan intervals equal to T2.
Claim 8
Dependent Claim
26 words
7 . The system of any of Claims 1 to 6 wherein said reporting means comprises means for reporting immediately when said interrupted beams have disappeared.
Claim 9
Dependent Claim
58 words
The system of Claim 7 wherein said system further comprises means for locking out repeated reportings of continuously present interrupted beams and said disappearance of said interrupted beams beyond the initial reporting of the coordinates of interrupted beams, said locking out means operating in response to the position of said interrupted beams for a selected display space format.
Claim 10
Independent Claim
30 words
The system of any of Claims 1 to 8 wherein said reporting means further comprises means for reporting the minimum and maximum coordinates of said interrupted beams for each axis.
Claim 11
Dependent Claim
30 words
10 . The system of any of Claims 1 to 9 wherein said reporting means further comprises means for reporting an average coordinate along each axis for said interrupted beams.
Claim 12
Dependent Claim
34 words
11 . The system of Claim 9 wherein said system further comprises means for reporting an error when the number of interrupted beams along either of sald axes is too small or too large.
Claim 13
Dependent Claim
30 words
The system of Claim 9 wherein said system further comprises means for reporting an error when said interrupted beams are discontinuous between the minimum and maximum coordinates along either axis.
Claim 14
Dependent Claim
32 words
The system of Claim 10 wherein said system further comprises means for reporting an error when the number of interrupted beams along either of said axes is too small or too large.
Claim 15
Dependent Claim
26 words
14 . The system of any of Claims 1 to 13 wherein said system further comprises: diagnostic means for checking the operation of each emitter/detector pair.
Claim 16
Dependent Claim
29 words
15 . The system of Claim 1 4 wherein said diagnostic means further comprises means operating at a reduced emitter output level to check marginal performance of said system.'
Claim 17
Dependent Claim
26 words
16 . The system of any of Claims 1 to 15 wherein said system further comprises: diagnostic means for checking the scan speed of said system.