Patent US4688019A successfully refreshed from Google Patents.
US4688019A
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Signal transmission system
Assignee: Dr Johannes Heidenhain GmbH
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Filing: 1984-10-05
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Granted: 1987-08-18
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Expires: 2004-10-05
Abstract
Abstract In a measuring instrument for measuring the relative position of two objects, the graduation of a scale as well as a number of identical reference marks absolutely positioned with respect to this graduation and associated code marks are scanned by a scanning unit. The periodic scanning signals obtained in the scanning of this graduation are transferred via first signal lines, and the reference signals obtained in the scanning of the reference marks are transferred over a second signal line to an evaluating arrangement. Code signals obtained in the scanning of the associated code marks by the scanning unit are also transmitted over the second signal line to the evaluating arrangement. The reference signals and the code signals on the second signal line are distinguished from one another by means of AND gates which ensure that the reference signals and the code signals are present on the second signal line only during respective predetermined signal states of the periodic scanning signals.
Inventors
- 👤 Walter Schmitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:37
CPC Classifications
G; G01; G01D; G01D5/00; G01D5/12; G01D5/244; G01D5/245; G01D5/2454; G01D5/2455; G01D5/2457
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
109 words
A method for transmitting signals in an instrument of the type comprising at least a first signal line on which a periodic signal with first and second signal states is transmitted, at least a second signal line, and means for generating at least first and second nonperiodic signals, said method comprising the following steps: transmitting the first nonperiodic signal via the second signal line when the periodic signal is in the first signal state; and transmitting the second nonperiodic signal via the second signal line when the periodic signal is in the second signal state; thereby transmitting both the first and second nonperiodic signals on the second signal line.
Claim 2
Independent Claim
109 words
A method for transmitting signals in an instrument of the type comprising at least a first signal line on which a periodic signal with first and second signal states is transmitted, at least a second signal line, and means for generating at least first and second nonperiodic signals, said method comprising the following steps: transmitting the first nonperiodic signal via the second signal line when the periodic signal is in the first signal state; and transmitting the second nonperiodic signal via the second signal line when the periodic signal is in the second signal state; thereby transmitting both the first and second nonperiodic signals on the second signal line.
Claim 3
Dependent Claim
14 words
The invention of claim 1 wherein the second nonperiodic signal comprises a monitoring signal.
Claim 4
Dependent Claim
118 words
A measuring instrument of the type comprising means for generating at least a periodic signal on at least a first signal line, said periodic signal having first and second signal states; at least a second signal line; and means for generating at least first and second nonperiodic signals; the improvement comprising: first means for gating the first nonperiodic signal onto the second signal line when the periodic signal is in the first signal state; and second means for gating the second nonperiodic signal onto the second signal line when the periodic signal is in the second signal state; said first and second means cooperating to transmit both the first and second nonperiodic signals on the second signal line.
Claim 5
Dependent Claim
118 words
A measuring instrument of the type comprising means for generating at least a periodic signal on at least a first signal line, said periodic signal having first and second signal states; at least a second signal line; and means for generating at least first and second nonperiodic signals; the improvement comprising: first means for gating the first nonperiodic signal onto the second signal line when the periodic signal is in the first signal state; and second means for gating the second nonperiodic signal onto the second signal line when the periodic signal is in the second signal state; said first and second means cooperating to transmit both the first and second nonperiodic signals on the second signal line.
Claim 6
Dependent Claim
60 words
The improvement of claim 7 further comprising: a third AND gate having a first noninverting input coupled to the first signal line and a second noninverting input coupled to the second signal line; and a fourth AND gate having a first inverting input coupled to the first signal line and a second noninverting input coupled to the second signal line.
Claim 7
Dependent Claim
34 words
The improvement of Claim 4 further comprising an evaluating unit coupled to respond to the periodic signal on the first signal line and to output signals generated by the third and fourth AND gates.
Claim 8
Independent Claim
183 words
A method for transmitting signals in a length or angle measuring instrument, the instrument comprising a measuring graduation, a plurality of identical reference marks associated with the graduation, a plurality of code marks associated with the reference marks, a scanning unit, at least a first signal line on which a periodic signal with first and second signal states is transmitted, the periodic signal generated by the scanning unit in response to scanning of the graduation, at least a second signal line, at least first and second nonperiodic signals, the first nonperiodic signal generated by the scanning unit in response to scanning of the reference marks, the second nonperiodic signal generated by the scanning unit in response to scanning of the code marks, said method comprising the following steps: transmitting the first nonperiodic signal via the second signal line when the periodic signal is in the first signal state; and transmitting the second nonperiodic signal via the second signal line when the periodic signal is in the second signal state; thereby transmitting both the first and second nonperiodic signals on the second signal line.
Claim 9
Independent Claim
183 words
A method for transmitting signals in a length or angle measuring instrument, the instrument comprising a measuring graduation, a plurality of identical reference marks associated with the graduation, a plurality of code marks associated with the reference marks, a scanning unit, at least a first signal line on which a periodic signal with first and second signal states is transmitted, the periodic signal generated by the scanning unit in response to scanning of the graduation, at least a second signal line, at least first and second nonperiodic signals, the first nonperiodic signal generated by the scanning unit in response to scanning of the reference marks, the second nonperiodic signal generated by the scanning unit in response to scanning of the code marks, said method comprising the following steps: transmitting the first nonperiodic signal via the second signal line when the periodic signal is in the first signal state; and transmitting the second nonperiodic signal via the second signal line when the periodic signal is in the second signal state; thereby transmitting both the first and second nonperiodic signals on the second signal line.
Claim 10
Dependent Claim
206 words
In a measuring instrument of the type comprising means for generating a periodic signal on a first signal line, said periodic signal having first and second signal states; a second signal line; and means for generating first and second nonperiodic signals; the improvement comprising: first means for gating the first nonperiodic signal onto the second signal line when the periodic signal is in the first signal state, the first means comprising a first AND gate having a first noninverting input connected to the first signal line, a second noninverting input coupled to receive the first nonperiodic signal, and an output; second means for gating the second nonperiodic signal onto the second signal line when the periodic signal is in the second signal state, the second means comprising a second AND gate having a first inverting input connected to the first signal line, a second noninverting input coupled to receive the second nonperiodic signal, and an output; and an OR gate having first and second inputs coupled to the outputs of the first and second AND gates, respectively, and an output coupled to the second signal line; said first and second means cooperating to transmit both the first and second nonperiodic signals on the second signal line.
Claim 11
Dependent Claim
206 words
In a measuring instrument of the type comprising means for generating a periodic signal on a first signal line, said periodic signal having first and second signal states; a second signal line; and means for generating first and second nonperiodic signals; the improvement comprising: first means for gating the first nonperiodic signal onto the second signal line when the periodic signal is in the first signal state, the first means comprising a first AND gate having a first noninverting input connected to the first signal line, a second noninverting input coupled to receive the first nonperiodic signal, and an output; second means for gating the second nonperiodic signal onto the second signal line when the periodic signal is in the second signal state, the second means comprising a second AND gate having a first inverting input connected to the first signal line, a second noninverting input coupled to receive the second nonperiodic signal, and an output; and an OR gate having first and second inputs coupled to the outputs of the first and second AND gates, respectively, and an output coupled to the second signal line; said first and second means cooperating to transmit both the first and second nonperiodic signals on the second signal line.
References Cited (Backward Citations)
US2986726A
Cited
US3534360A
Cited
US3601634A
Cited
US4101764A
Cited
US4229647A
Cited
US4306220A
Cited
DE2850555A1
Cited
US4418348A
Cited
US4342025A
Cited
US4524347A
Cited
DE3039483A1
Cited
US4491928A
Cited
US4465928A
Cited
US4600835A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-08-17 | 1991-02-16 | 1991-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-17 | 1995-02-16 | 1995-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-17 | 1999-02-16 | 1999-08-18 | $7700.00 | Window Closed / Lapsed |