Patent US5128775A successfully refreshed from Google Patents.
Patent US4396990A successfully refreshed from Google Patents.
US4396990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Checking system for checking the functional integrity of the operating magnets in a flatbed knitting machine
Assignee: Henkel Dorus GmbH and Co KG
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Filing: 1980-09-25
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Granted: 1983-08-02
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Expires: 2000-09-25
Abstract
Abstract A system for checking the functional state of the operating magnets in a tbed knitting machine includes a microprocessor, a keyboard, a display unit, and sensors detecting short-circuit and open-circuit conditions in the magnets and their connections. In order to avoid dismantling the machine to check the magnets, the magnets are subjected in turn to pulse sequences at respective different frequencies and their behavior is monitored. One can monitor the vibrational noise of the magnets or the rise time of current and voltage in the magnets. The checking process can be initiated automatically, for example each time the machine is started up, or controlled manually via the keyboard. Frequencies within the range of 1 to 50 Hz are preferably used.
Inventors
- 👤 Albin K. Weingartner
- 👤 David A. Retallick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:27
CPC Classifications
G; G01; G01R; G01R31/00; D; D04; D04B; D04B35/00; D04B35/10; G01R31/327; G01R31/3277; G01R31/3278
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
126 words
An electromagnetically controlled flatbed knitting machine comprising a checking system for checking the operating state of operating magnets in said machine, said system comprising: amplifier means for feeding pulse sequences to said operating magnets in response to respective control signals; control means, including at least a microprocessor and a keyboard connected thereto, for selectively providing said control signals to said amplifier means, said control signals having different frequencies according to different functions of said operating magnets; sensing means having outputs monitored by said microprocessor for sensing whether or not each operating magnet operates properly in response to said control signals; and display means controlled by said microprocessor in accordance with the monitored sensing means outputs for indicating whether or not each operating magnet is operating properly.
Claim 2
Dependent Claim
126 words
An electromagnetically controlled flatbed knitting machine comprising a checking system for checking the operating state of operating magnets in said machine, said system comprising: amplifier means for feeding pulse sequences to said operating magnets in response to respective control signals; control means, including at least a microprocessor and a keyboard connected thereto, for selectively providing said control signals to said amplifier means, said control signals having different frequencies according to different functions of said operating magnets; sensing means having outputs monitored by said microprocessor for sensing whether or not each operating magnet operates properly in response to said control signals; and display means controlled by said microprocessor in accordance with the monitored sensing means outputs for indicating whether or not each operating magnet is operating properly.
Claim 3
Dependent Claim
28 words
A knitting machine according to claim 1, wherein said amplifier means energizes and de-energizes said magents at respective different frequencies within the range of 1 to 50 Hz.
Claim 4
Dependent Claim
29 words
A knitting machine according to claim 1, wherein said sensing means includes sensors connected to the microprocessor for detecting noise which occurs upon energization and de-energization of said magnets.
Claim 5
Dependent Claim
21 words
A knitting machine according to claim 1, wherein said microprocessor monitors the rise time of current and voltage in said magnets.
Claim 6
Dependent Claim
40 words
A knitting machine according to claim 1, wherein said control means includes a cyclic pulse generator connected to the microprocessor for providing said pulse sequences to the individual magnets each on the basis of a signal supplied by said keyboard.
Claim 7
Dependent Claim
29 words
A knitting machine according to claim 1, in which said control means automatically feeds said pulse sequences to the magnets in response to a signal supplied to the microprocessor.
Claim 8
Dependent Claim
35 words
A knitting machine according to claim 6, in which the signal supplied to said microprocessor is supplied by the keyboard and/or automatically upon starting up of the machine and/or intermittently during operation of the machine.
Claim 9
Dependent Claim
34 words
A knitting machine according to claim 1, in which said control means generates a signal to stop the machine in the event of a defeat being detected in one or more of the magnets.
Claim 10
Dependent Claim
31 words
A knitting machine according to claim 1, in which the microprocessor controls said display means to display the functional state of the magnets and also an identification of the respective magnets.
Claim 11
Dependent Claim
16 words
A knitting machine according to claim 1, which includes a separate amplifier provided for each magnet.
Claim 12
Dependent Claim
21 words
A knitting machine according to claim 1, in which the amplifier means includes sensor means for detecting short-circuit and open-circuit conditions.
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) | 1986-08-01 | 1987-01-31 | 1987-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-01 | 1991-01-31 | 1991-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-01 | 1995-01-31 | 1995-08-02 | $7700.00 | Window Closed / Lapsed |