EP0026425A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Control device for a circular knitting machine, in particular a hose knitting machine
Assignee: COSTRUZIONI MECCANICHE LONATI SpA
•
Filing: 1980-09-22
•
Granted: —
•
Expires: 2000-09-22
Abstract
Abstract The invention provides a circular knitting machine, in particular a single or double cylinder hose knitting machine, wherein various operations, such as the advancement of the main drum (2), speed changing, needle selection, movement of the stitch-adjusting unit (3), etc. are controlled by an electronic programming unit instead of the traditional main chain. The electronic programming unit programmingly controls a series of electro-mechanical transducers, preferably solenoid valves and pneumatic or hydraulic cylinders (12, 23), which determine the required movements of the machine operational members (2, 3). The programming unit is operative at each revolution of the machine to receive drive pulses from a revolution transducer. A considerable constructional simplification and adaptability of the machine to different knitting programs is thus achieved.
Inventors
- 👤 Francesco Lonati
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 13:27
CPC Classifications
D; D04; D04B; D04B15/00; D04B15/66; D04B15/68; D04B15/78
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
80 words
A control device for a circular knitting machine, in particular a hose knitting machine, adapted for controlling operational machine members, the device being characterized in that it comprises an electronic storage-type programming unit (41) effective to produce control pulses in the sequence of operations required by the knitting process, and at least one electromechanical transducer (33;54) for converting the control pulses generated by said electronic programming unit (41) into mechanical movements for controlling said operational machine members (2, 3, 45).
Claim 2
Dependent Claim
80 words
A control device for a circular knitting machine, in particular a hose knitting machine, adapted for controlling operational machine members, the device being characterized in that it comprises an electronic storage-type programming unit (41) effective to produce control pulses in the sequence of operations required by the knitting process, and at least one electromechanical transducer (33;54) for converting the control pulses generated by said electronic programming unit (41) into mechanical movements for controlling said operational machine members (2, 3, 45).
Claim 3
Dependent Claim
68 words
A device according to Claim 1, characterized in that said at least one electromechanical transducer (33) comprises at least one solenoid valve (32) actuated by said electronic programming unit (41) and operative to admit fluid under pressure into a pneumatic or hydraulic cylinder (12,23,48) wherein a piston (28 s 51) is slidable, said piston (28,51) being operatively connected to a respective one of said operational members (2,3, 45).
Claim 4
Dependent Claim
45 words
A device according to Claim 1, characterized in that said at least one electromechanical transducer comprises at least one electromagnet (54) activated by said electronic prcgramming unit (41) and having a movable anchor (55) operatively connected to a respective one of said operational members (45).
Claim 5
Independent Claim
68 words
A device according to Claims 1 and 2 or 1 and 3, characterized in that to said at least one electromechanical transducer (33) there is connected one end of a lever (10) pivoted, at an intermediate point thereof, to the machine stationary structure (1) and having an opposite end adapted for de-actuating, under control by said transducer (33), the advancement pawl (5) of the machine main drum (2).
Claim 6
Independent Claim
95 words
A device according to Claims 1 and 2 or 1 and 3, characterized in that said at least one electromechanical transducer (33) is associated with one end of a lever (21) pivoted, at an intermediate point thereof, to the machine stationary structure (1) and having an opposite end in the shape of a hook adapted for penetrating a yoke element (17) carrying a pawl (15) for advancing a cam (13) of a stitch-adjusting device (3), known per se, the engagement of said opposite end with said yoke element (17) causing said pawl (15) to stop.
Claim 7
Independent Claim
94 words
A device according to Claims 1 and 2, or 1 and 3, characterized in that a plurality of electro- mechanical transducers (33,54) are provided for selective control by said electronic programming unit (41), said transducers (33,54) being associated each with a selection slide (43) of a needle selecting device to move the respective selection slide (43) between a position whereat the selection slide (43) does not interfere with the pattern butts (44) of jacks (45) associated with the needles and a position whereat the selection slide (43) interferes with one of said butts (44).
Claim 8
Independent Claim
86 words
A device according to one or more of the preceding claims, characterized in that it comprises members effective to drive said electronic programming unit (41), said drive members including a disk (36) rotating synchronically with the needle cylinder(s) (38) and being provided with at least one radial pin (39), and at least one photoelectric element (40), preferably a phototransistor, in the path of said rotating pin (39) for generating a drive pulse to said electronic programming unit (41) for each revolution of the needle cylinder(s) (38).
Claim 9
Independent Claim
118 words
A device according to one or more of the preceding claims, characterized in that said electronic programming unit (41) comprises a microprocessor (56), at least one read-only memory (ROM) (59) containing a main knitting program, at least a pair of random access memories (RAM) (57,58) containing a specific knitting program, peripheral interface adapters (PIA) (60,61,62,63) for connecting said microprocessor (56) and said memories (57,58,59) to a keyboard type of programming device (64), a machine number of revolutions display (65), a member (67)- supplying pulses to said electronic programming unit (41) synchronically with the revolutions of the needle cylinder(s) (38) in the machine, and at least one amplifier (69) adapted for controlling said at least one electromechanical transducer (33,54).
Claim 10
Independent Claim
32 words
A device according to one or more of the preceding claims, characterized in that said electronic programming unit (41) is controlled by means of a magnetic tape (68) containing a knitting program.
Claim 11
Independent Claim
62 words
A device according to one or more of the preceding claims, characterized in that it comprises a pin or peg (78) rigid with the machine main drum (2) and a microswitch (77) actuated by said pin or peg (78) at each complete revolution of said main drum (2) to zero said electronic programming unit (41) at the end of each knitting cycle.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.