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US3719803A
Expired / Lapsed
US
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Electronic reading in of designs for the preparation of perforated jacquard cards
Assignee: Staeubli Verdol SA
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Filing: 1972-01-18
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Granted: 1973-03-06
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Expires: 1992-01-18
Abstract
Abstract The invention refers to the electronic reading in systems for the designs on squared paper provided for the preparation of the perforated cards or paper used in loom jacquards. These systems generally comprise main photo-electric means which follow the successive horizontal rows of squares to detect the colors thereof and to emit corresponding main signals which are applied to the transducer circuits of a perforating machine through a gating circuit, and auxiliary photo-electric means which scan a succession of vertical lines (actually the vertical lines of the squared paper) to generate auxiliary conditioning signals which are applied to the gating circuit to only condition same when the main photo-electric means are just in front of the center of a square. In order to avoid that a defectively printed vertical line may cause a defective perforation, according to the invention the system further includes chronometric means which generate chronometric pulses in substantial synchronism with the auxiliary pulses, and if some of the latter are missing, these chronometric pulses act on the gating circuit to permit passage of the main signals while the main photo-electric means still scan the central portion of the respective squares to which the missing auxiliary pulses should have corresponded.
Inventors
- 👤 P Frappe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:13
CPC Classifications
D; D03; D03C; D03C19/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
261 words
In a system for the electronic reading in of designs on squared paper for the preparation of the perforated cards or papers used in loom jacquards and for the control of a perforating machine in accordance with said design, the said system including: main photo-electric means which are moved at a substantially constant speed with respect to said paper to scan the squares of the successive rows of squares thereof so as to detect at least one of the colors of the design and to generate corresponding main signals; a gating circuit through which said main signals may reach the perforating machine to control same, said gating circuit being normally blocked; and auxiliary photo-electric means which detect a series of successive lines in unison with the scanning of the centers of the successive squares by said photo-electric means to generate corresponding auxiliary pulses at a substantially constant frequency, said auxiliary pulses acting on said gating circuit to condition same for passage of said main signals towards the perforating machine; the improvement according to which said system further comprises: chronometric means to generate chronometric pulses at a frequency substantially equal to the frequency of said auxiliary pulses; means to substantially synchronize said chronometric pulses with said auxiliary pulses in such manner that each of said chronometric pulses appears while said main photo-electric means scan the central portion of a square; and means to apply said chronometric pulses to said gating circuit at least when one of said auxiliary pulses is missing to condition said gating circuit for passage of said main signal.
Claim 2
Dependent Claim
261 words
In a system for the electronic reading in of designs on squared paper for the preparation of the perforated cards or papers used in loom jacquards and for the control of a perforating machine in accordance with said design, the said system including: main photo-electric means which are moved at a substantially constant speed with respect to said paper to scan the squares of the successive rows of squares thereof so as to detect at least one of the colors of the design and to generate corresponding main signals; a gating circuit through which said main signals may reach the perforating machine to control same, said gating circuit being normally blocked; and auxiliary photo-electric means which detect a series of successive lines in unison with the scanning of the centers of the successive squares by said photo-electric means to generate corresponding auxiliary pulses at a substantially constant frequency, said auxiliary pulses acting on said gating circuit to condition same for passage of said main signals towards the perforating machine; the improvement according to which said system further comprises: chronometric means to generate chronometric pulses at a frequency substantially equal to the frequency of said auxiliary pulses; means to substantially synchronize said chronometric pulses with said auxiliary pulses in such manner that each of said chronometric pulses appears while said main photo-electric means scan the central portion of a square; and means to apply said chronometric pulses to said gating circuit at least when one of said auxiliary pulses is missing to condition said gating circuit for passage of said main signal.
Claim 3
Dependent Claim
261 words
In a system for the electronic reading in of designs on squared paper for the preparation of the perforated cards or papers used in loom jacquards and for the control of a perforating machine in accordance with said design, the said system including: main photo-electric means which are moved at a substantially constant speed with respect to said paper to scan the squares of the successive rows of squares thereof so as to detect at least one of the colors of the design and to generate corresponding main signals; a gating circuit through which said main signals may reach the perforating machine to control same, said gating circuit being normally blocked; and auxiliary photo-electric means which detect a series of successive lines in unison with the scanning of the centers of the successive squares by said photo-electric means to generate corresponding auxiliary pulses at a substantially constant frequency, said auxiliary pulses acting on said gating circuit to condition same for passage of said main signals towards the perforating machine; the improvement according to which said system further comprises: chronometric means to generate chronometric pulses at a frequency substantially equal to the frequency of said auxiliary pulses; means to substantially synchronize said chronometric pulses with said auxiliary pulses in such manner that each of said chronometric pulses appears while said main photo-electric means scan the central portion of a square; and means to apply said chronometric pulses to said gating circuit at least when one of said auxiliary pulses is missing to condition said gating circuit for passage of said main signal.
Claim 4
Dependent Claim
261 words
In a system for the electronic reading in of designs on squared paper for the preparation of the perforated cards or papers used in loom jacquards and for the control of a perforating machine in accordance with said design, the said system including: main photo-electric means which are moved at a substantially constant speed with respect to said paper to scan the squares of the successive rows of squares thereof so as to detect at least one of the colors of the design and to generate corresponding main signals; a gating circuit through which said main signals may reach the perforating machine to control same, said gating circuit being normally blocked; and auxiliary photo-electric means which detect a series of successive lines in unison with the scanning of the centers of the successive squares by said photo-electric means to generate corresponding auxiliary pulses at a substantially constant frequency, said auxiliary pulses acting on said gating circuit to condition same for passage of said main signals towards the perforating machine; the improvement according to which said system further comprises: chronometric means to generate chronometric pulses at a frequency substantially equal to the frequency of said auxiliary pulses; means to substantially synchronize said chronometric pulses with said auxiliary pulses in such manner that each of said chronometric pulses appears while said main photo-electric means scan the central portion of a square; and means to apply said chronometric pulses to said gating circuit at least when one of said auxiliary pulses is missing to condition said gating circuit for passage of said main signal.
Claim 5
Dependent Claim
115 words
In a system as claimed in claim 1: said chronometric means being in the form of a pulse generator having an outlet connected to said gating circuit and a synchronizing inlet through which the frequency of said generator may be adjusted; and said system further comprising a comparator having a first inlet connected to the outlet of said generator, a second inlet connected to said auxiliary photo-electric means to receive said auxiliary pulses therefrom, and an outlet connected to the synchronizing inlet of said generator to alter the frequency thereof in response to the order in which said comparator receives the chronometric pulses from said generator and the auxiliary pulses from said auxiliary photo-electric means.
Claim 6
Dependent Claim
209 words
In a system as claimed in claim 1: said chronometric means being in the form of a monostable circuit having a stable state and an unstable state, and including an inlet connected to said auxiliary photo-electric means to be brought to its unstable state by said auxiliary pulses, and said monostable circuit also having an outlet, the period of said monostable circuit to return from its unstable state to its stable state in the absence of any pulse on its inlet and to emit a corresponding pulse on its outlet being longer than the period which corresponds to the frequency of said auxiliary pulses; said system further comprising OR gate means having an outlet connected to said gating circuit, a first inlet connected to said auxiliary photo-electric means, and a second inlet connected to the outlet of said monostable circuit; and the difference between the periods of said monostable circuit and of said auxiliary pulses being so small that when an auxiliary pulse emitted by said monostable circuit at the end of its period may condition said gating circuit through said OR gate means while said main photo-electric means still scan the central portion of the square to the center of which said missing auxiliary pulse should have corresponded.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-05 | 1976-09-04 | 1977-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-05 | 1980-09-04 | 1981-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-05 | 1984-09-04 | 1985-03-06 | $7700.00 | Window Closed / Lapsed |