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US 4,271,687 AGranted
Rapid maintenance thread or yarn supply apparatus, particularly for circular knitting machines
AssigneeMemminger GmbH
InventorsGustav Memminger, Falk Kuhn
Life of this patent
Estimating the term…
Abstract
To permit ready disassembly of thread sensing and thread brake elements from a yarn feed device, the thread sensing, thread guiding and thread brake elements are, selectively, secured to a separate attachment or housing which is connected to the holder by means of a slidable shoe-socket arrangement which, additionally, carries the contacts for the stop-motion system of the machine so that, depending on yarn being used on the machine and supplied by the device, the supply guide element can be suitably assembled to the machine without disassembly of the thread feeding devices including the thread supply drums as such; or the stop-motion switches coupled to stop-motion sensing elements can be individually maintained or replaced.
Claims24
Rapid-maintenance thread or yarn supply apparatus, particularly for a circular knitting machine having
- a holder (1) having a rear portion (2, 3) adapted for assembly to the machine;
- a thread supply drum (6) rotatably journalled on the holder;
- thread supply guide means (35, 36, 42) having, in operation of the machine, a predetermined position relative to the axis of rotation of the drum and guiding the thread in a supply guide path to the drum to wind a storage winding (43) thereon;
- thread take-off guide means (15, 38, 291) having, in operation of the machine, a predetermined position relative to the axis of rotation of the drum and guiding thread being taken off the drum in a take-off guide path;
- movable leading thread presence sensing means (30, 32) located in the supply guide path of the thread and in advance of the storage drum to sense presence and tension of thread (34) being supplied to the drum;
- movable trailing thread presence sensing means (29, 290) located in the take-off guide path of the thread and downstream of the storage drum to sense presence and tension of thread (37) being taken off the drum;
- a housing (22) removably attached to a front portion of the holder (1) to which both the leading thread presence sensing means (30, 32) and the trailing thread presence sensing means (29, 290) are secured;
- a thread supply portion (40) forming at least part of said thread guide means, pivotally secured to the housing and pivotable about a pivot axis (41) transverse to the axis of rotation of the drum, and including a thread drag sensing means (36);
- switch means (S29, S30, S40) located in said housing, operated by the respective thread presence sensing means and the thread drag sensing means;
- separable and engageable connecting contact means located, respectively, on said housing and on the holder;
- and relatively slidable interengaging means (24, 25) on the holder, and on the housing, respectively, to removably secure the housing, and with it said thread sensing means, said drag sensing means, and said switch means to the holder and electrically connect the switch means to a stop motion circuit connection in the holder for connection to the step motion system of the machine;
- to permit separate removal of the housing and with it the thread presence and drag sensing means without disassembly of the holder (1) and the drum (6) journalled therein from the machine.
9 more elements
For combination with a thread or yarn supply apparatus, particularly for a circular knitting machine, having
- a holder (1) for assembly to the knitting machine;
- a thread supply drum (6) rotatably journalled on the holder (1), a thread supply guide means (35, 42) guiding the thread in a thread supply path to the drum to wind a storage winding (43) thereon;
- and
- a thread take-off guide means (15, 38, 29') guiding thread being taken off the drum in a thread take-off path;
- a rapid maintenance attachment comprising separable means (22) removably attachable to the holder (1), said separable means having secured thereto
- a thread brake (36) pivotally secured to said attachment and pivotable about a pivot axis (41) transverse to the axis of rotation (5) of the drum, and including switch means (S40) operable upon pivoting movement of said thread brake (36) upon pivoting movement beyond a certain limit;
- leading thread presence sensing means (30, 32) located in advance of the storage drum, when the attachment is assembled to the holder, to sense presence and tension of the thread being supplied to the drum in the thread supply path and including switch means (S30) operated by said leading thread presence sensing means;
- trailing thread presence sensing means (29, 290) located downstream of the storage drum, when the attachment is secured to the holder, to sense presence and tension of thread (37) being taken off the drum in the thread take-off path and including switch means (S29) operated by said trailing thread presence sensing means;
- wherein the holder and the rapid maintenance attachment are formed with mutually interengaging sliding separable connection means (24, 25) to separably but firmly connect the holder and said attachment together;
- and separable connecting contact means (26, 27) respectively located on said attachment and on the holder and positioned for separable engagement upon interconnection of said attachment and the holder, the connecting contact means (26) on the attachment being in electrical circuit connection with said switch means (S29, S30, S40).
7 more elements
Rapid-maintenance thread or yarn supply apparatus, particularly for a circular knitting machine, having
- a holder (1) having a rear portion (2, 3) adapted for assembly to the machine;
- a thread supply drum (6) rotatably journalled on the holder;
- thread supply guide means (35, 36, 42) having, in operation of the machine, a predetermined position relative to the axis of rotation of the drum and guiding the thread in a supply guide path to the drum to wind the storage winding (43) thereon;
- thread take-off guide means (15, 38, 291) having, in operation of the machine, a predetermined position relative to the axis of rotation of the drum and guiding thread being taken off the drum in a take-off guide path;
- movable leading thread presence sensing means (30, 32) located in the supply guide path of the thread and in advance of the storage drum to sense presence and tension of thread (34) being supplied to the drum;
- movable trailing thread presence sensing means (29, 290) located in the take-off guide path of the thread and downstream of the storage drum to sense presence and tension of thread (37) being taken off the drum;
- a thread supply portion (40) including a thread guide eye (42) forming part of said thread supply guide means, said supply portion being movably secured to said housing and movable in the path of the thread from a supply to the drum (6);
- a housing (22) removably attached to the front portion of the holder (1) to which at least one of said movable thread presence sensing means (30, 32;
- 29, 290) is secured to permit separate removal of the housing and with it the respective thread presence sensing means without disassembly of the holder (1) and the drum (6) journalled therein from the machine;
- a belt holder and guide element (50) secured to the supply portion (40) and positioned opposite a drive belt (10) engageable with the thread supply drum (6);
- and wherein the thread supply drum has a first portion engageable by said drive belt (10) and a second portion separate from said first portion on which the thread storage winding (43) is wound, said belt holder and guide element retaining said belt on the first portion of the drum which is assigned to said belt and remote from the second portion assigned to the storage winding (43)
8 more elements
Dependencies are inferred from the claim text.