US3565126A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrangement on a loom for monitoring the weft insertion member
Assignee: Ruti Machinery Works Ltd
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Filing: 1969-01-21
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Granted: 1971-02-23
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Expires: 1989-01-21
Abstract
Abstract An arrangement for use in a loom for monitoring the movement of a weft insertion member, e.g., a shuttle which comprises means for producing two transit signals during movement of the shuttle through the loom, the time interval between the signals being dependent upon the speed of the shuttle, and a device actuated by these signals for performing a preset monitoring operation. This device produces an indication which occurs at the end of the completion of the preset operation, is so actuated by the signals that the first transit signal initiates the preset operation, and the second signal interrupts the preset operation, and allows the duration of the preset operation to be variable.
Inventors
- 👤 Rudolf Schlappi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:57
CPC Classifications
D; D03; D03D; D03D49/00; D03D49/58
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
185 words
An arrangement for use in a loom for monitoring the movement of a shuttle, comprising a first means for producing two transit signals during movement of a shuttle on a path through the loom, the time interval between the signals being dependent upon the speed of the shuttle; and a second means actuated by said signals for performing a preset monitoring operation and for producing an indication at the end of said preset monitoring operation, said second means comprising storage means for storing electrical energy; electrical circuit means responsive to said transit signals; said circuit means, in response to the first transit signal, charging electrical energy to said storage means whereby said preset operation is initiated and, in response to the second transit signal, discharging said storage means whereby said preset operation is interrupted; a signal producing means coupled to said storage means and responsive to the electrical energy stored therein for producing said indication when the electrical energy supplied and stored in said storage means exceeds a given threshold value; and regulating means for varying the speed by which said storage means is charged.
Claim 2
Dependent Claim
185 words
An arrangement for use in a loom for monitoring the movement of a shuttle, comprising a first means for producing two transit signals during movement of a shuttle on a path through the loom, the time interval between the signals being dependent upon the speed of the shuttle; and a second means actuated by said signals for performing a preset monitoring operation and for producing an indication at the end of said preset monitoring operation, said second means comprising storage means for storing electrical energy; electrical circuit means responsive to said transit signals; said circuit means, in response to the first transit signal, charging electrical energy to said storage means whereby said preset operation is initiated and, in response to the second transit signal, discharging said storage means whereby said preset operation is interrupted; a signal producing means coupled to said storage means and responsive to the electrical energy stored therein for producing said indication when the electrical energy supplied and stored in said storage means exceeds a given threshold value; and regulating means for varying the speed by which said storage means is charged.
Claim 3
Dependent Claim
27 words
The arrangement of claim 1 in which said second means includes an indicating means to which the indication is applied for indicating completion of the monitoring operation.
Claim 4
Dependent Claim
36 words
The arrangement of claim 1 in which the regulating means includes a scale which indicates the extent of the variation of the preset operation and which is calibrated in flight times or speeds of the shuttle.
Claim 5
Dependent Claim
38 words
The arrangement of claim 1 in which said circuit means comprises a flip-flop circuit, said flip-flop circuit in one condition successively charging electrical energy to said storage means and in its other condition successively discharging said storage means.
Claim 6
Dependent Claim
46 words
The arrangement of claim 1 further comprising means for stopping the loom, the duration of the preset operation being made variable during that period of operation when the loom is in its starting phase, and said indication being applied to the means for stopping the loom.
Claim 7
Dependent Claim
94 words
The arrangement of claim 5 in which said storage means comprises a first capacitor and said regulating means includes a second capacitor which is coupled to the first capacitor by a coupling which has limited conductivity for the charging energy to be applied to the first capacitor, the discharge arrangement of the second capacitor being inoperative, during the preset operation so that, with successive operations of the arrangement during the starting period of the loom, constantly decreasing amounts of the charging energy to be applied to the first capacitor flow to the second capacitor.
Claim 8
Dependent Claim
60 words
The arrangement of claim 1 in which said signal producing means comprises a trigger means coupled to said storage means, said trigger means being so adjusted that when the predetermined threshold value is reached, said trigger means is changed over from one state of operation to another state of operation, the other state of operation serving to produce said indication.
Claim 9
Dependent Claim
72 words
The arrangement of claim 7 in which the storage means comprises a capacitor and the trigger means comprises a transisTor which changes from a nonconductive state to a conductive state when a predetermined voltage is present at its control electrode in relation to another of its electrodes, said electrodes being connected in parallel with said capacitor and the capacitor having a voltage equal to this predetermined voltage on reaching its threshold value.
Claim 10
Dependent Claim
28 words
The arrangement of claim 8 in which said transistor is a unijunction transistor which has an emitter electrode that serves as said control electrode and two base electrodes.
Claim 11
Dependent Claim
117 words
The arrangement of claim 1 in which said electric circuit means includes a voltage source, two electrical contacts and a switching means, said storage means comprises a first capacitor and said regulating means includes a resistor, said capacitor together with the resistor forming a series arrangement situated between said two electrical contacts, one contact being coupled to one pole of the voltage source and the other contact being coupled to the switch means which is controllable in dependence upon the transit signals, whereby said other contact can be selectively electrically connected to said one pole of the voltage source or to ground by said switch means in order to effect charging or discharging of said first capacitor.
Claim 12
Dependent Claim
67 words
The arrangement of claim 10 in which said switch means comprises a transistor having one electrode coupled to ground and a second electrode coupled via the other contact of the series arrangement and through another resistor to said one pole of the voltage source, whereby said two electrodes may be conductively and nonconductively connected by the control electrode of the transistor in dependence upon said transit signals.
Claim 13
Dependent Claim
67 words
The arrangement of claim 11 in which the switch means is formed by one transistor of a flip-flop circuit comprising two transistors and controllable by the transit signals and the potential of the control electrode of one transistor being changed between two values by the operation of the flip-flop circuit, whereby said one transistor becomes alternately conductive and nonconductive between its emitter electrode and its collector electrode.
Claim 14
Dependent Claim
17 words
The arrangement of claim 10 in which the resistor of the series arrangement is a variable resistor.
Claim 15
Dependent Claim
55 words
The arrangement of claim 10 in which said regulating means also includes a second capacitor and a rectifier connected in series therewith which are connected in parallel with said first capacitor and are capacitively coupled to said first capacitor, the rectifier being conductive in the forward direction of the current supplied by the voltage source.
Claim 16
Dependent Claim
36 words
The arrangement of claim 10 in which said regulating means includes a rectifier coupled in parallel with said resistor, said rectifier conducting in the opposite direction to the charging current supplied by said electrical circuit means.
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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |