Patent US3667023A successfully refreshed from Google Patents.
US3667023A
Expired / Lapsed
US
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Tracer control system
Assignee: Cleveland Machine Controls Inc
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Filing: 1970-03-30
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Granted: 1972-05-30
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Expires: 1990-03-30
Abstract
Abstract A tracer control system employs a plurality of sampling devices for decoding signals representing information relating to the magnitude and direction of deflection of a stylus associated with a tracer head. The signals from the sampling devices are mixed with the outputs of other sampling devices, which outputs are representative of reference signals, to produce control signals to control the drive of the stylus relative to a template.
Inventors
- 👤 Marcel R Sommeria
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:32
CPC Classifications
B; B23; B23Q; B23Q35/00; B23Q35/04; B23Q35/08; B23Q35/12; B23Q35/14; B23Q35/121; B23Q35/123
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
228 words
In apparatus of the type described, having a tracer head with a stylus adapted to bear on the surface of a template, drive means for moving said tracer head relative to said template in at least two orthogonal directions and an oscillator for exciting said tracing head, said tracer head producing an output indicative of the magnitude and direction of displacement of said stylus relative to said template; the combination comprising means for deriving a first signal proportional to the product of the deflection magnitude and the cosine of the deflection angle, means for deriving a second signal proportional to the product of the deflection magnitude and the sine of the deflection angle, means for deriving a third signal proportional to the product of the desired deflection magnitude and the cosine of the deflection angle, means for deriving a fourth signal proportional to the product of the desired deflection magnitude and the sine of the deflection angle, first mixing means for mixing said first and third signals to produce an output signal to control said drive means for moving said tracer head relative to said template in a first direction, and second mixing means for mixing said second and fourth signals to control said drive means for moving said tracer head relative to said template in a second direction, said second direction being orthogonal with said first direction.
Claim 2
Dependent Claim
228 words
In apparatus of the type described, having a tracer head with a stylus adapted to bear on the surface of a template, drive means for moving said tracer head relative to said template in at least two orthogonal directions and an oscillator for exciting said tracing head, said tracer head producing an output indicative of the magnitude and direction of displacement of said stylus relative to said template; the combination comprising means for deriving a first signal proportional to the product of the deflection magnitude and the cosine of the deflection angle, means for deriving a second signal proportional to the product of the deflection magnitude and the sine of the deflection angle, means for deriving a third signal proportional to the product of the desired deflection magnitude and the cosine of the deflection angle, means for deriving a fourth signal proportional to the product of the desired deflection magnitude and the sine of the deflection angle, first mixing means for mixing said first and third signals to produce an output signal to control said drive means for moving said tracer head relative to said template in a first direction, and second mixing means for mixing said second and fourth signals to control said drive means for moving said tracer head relative to said template in a second direction, said second direction being orthogonal with said first direction.
Claim 3
Dependent Claim
29 words
Apparatus according to claim 1 wherein said means for deriving said signals each comprises means for selectively sampling the magnitude of an input signal and thereafter manifesting said magnitude.
Claim 4
Dependent Claim
28 words
Apparatus according to claim 2 including means for connecting one of said sampling means with said tracer head, whereby said input signal is a tracer head generated signal.
Claim 5
Dependent Claim
23 words
Apparatus according to claim 2 including means for connecting sampling means with said oscillator, whereby said input signal is an oscillator generated signal.
Claim 6
Dependent Claim
69 words
Apparatus according to claim 2, including means for connecting a first pair of said sampling means with said tracer head, wHereby the input signals of said first pair of sampling means are each a tracer head generated signal, and means for connecting a second pair of said sampling means with said oscillator whereby the input signals of said second pair of sampling means are each an oscillator generated signal.
Claim 7
Dependent Claim
90 words
Apparatus according to claim 5 including means for connecting said first pair of sampling devices with said oscillator to cause said first pair of sampling means to each sample said tracer head generated signal at times bearing a predetermined phase relation to a signal generated by said oscillator, and means for connecting said second pair of sampling means to said tracer head to cause said second pair of sampling means to each sample said oscillator generated signal at times bearing a predetermined phase relation to said tracer head generated signal.
Claim 8
Dependent Claim
27 words
Apparatus according to claim 1 wherein said means for deriving said third and fourth signals include variable resistor means for adjusting the magnitude of the desired deflection.
Claim 9
Dependent Claim
63 words
Apparatus according to claim 1 including means for deriving a pair of signals respectively representative of the desired velocity of said tracer head relative to said template in two orthogonal directions, means for mixing one of said velocity representative signals with said first and third signals, and means for mixing the other of said velocity representative signals with said second and fourth signals.
Claim 10
Dependent Claim
31 words
Apparatus according to claim 8, wherein said means for deriving said velocity representative signals includes variable resister means for adjusting the desired velocity of the tracer head relative to the template.
Claim 11
Dependent Claim
16 words
Apparatus according to claim 8 including inverter means for inverting one of said velocity representative signals.
Claim 12
Dependent Claim
22 words
Apparatus according to claim 9 including selectively operable contact means for selectively inverting one or the other of said velocity representative signals.
Claim 13
Dependent Claim
34 words
Apparatus according to claim 1 including means for selectively disconnecting said third and fourth signals from said mixing means to permit manual control of the positioning of said tracer head relative to said template.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |