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Publication numberUS2222288 A
Publication typeGrant
Publication dateNov 19, 1940
Filing dateOct 6, 1938
Publication numberUS 2222288 A, US 2222288A, US-A-2222288, US2222288 A, US2222288A
InventorsBen K. Ford
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Cover forming apparatus
US 2222288 A
Abstract  available in
Images(2)
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Claims  available in
Description  (OCR text may contain errors)

Nov. 19, 1940. B. K. FORD 2,222,288

COVER FORMING APPARATUS Filed Oct. 6, 1938 2 Sheets-Sheet 1 INVENTOR By B. K. FORD '\R\7 W/QM ATTORNEY Search rioorw uu. LA! ILth. KNH HNU.

Nov. 19, 1940. B. K. FORD COVER FORMING APPARATUS 2 Sheets-Sheet 2 Filed Oct. 6, 1938 FIG. 4

INVENTOR B. K. FORD .4 7' TOR/VEY Patented Nov. 19, 1940 UNITED STATES \JUQI bll PATENT OFFICE Electric Company,

Incorporated, New York,

N. Y., a corporation of New York Application October 6, 1938, Serial No. 233,544

17 Claims.

This invention relates to cover forming apparatus, and more particularly to apparatus for covering non-circular cores.

In some phases of the electrical art it has been found advantageous to employ non-circular conductors or cables the shapes of which vary depending upon their particular use. Such conductors are frequently provided with insulating coverings of textile cotton threads and the vario ous shapes present their particular problems regarding the uniform application of the coverings thereon.

An object of the invention is to provide an apparatus for efliciently and uniformly covering non-circular cores. With this and other objects in view, the invention comprises a knitting apparatus having a stationary needle bed centrally apertured for the passage of a non-circular core therethrough and grooved to receive needles reciprocated by fluid actuating pistons disposed in a stationary cylinder block associated with a fluid controlling element, the latter being rotatable with supports for cops supplying threads to the needles.

Other objects and advantages will be apparent from the following detailed description taken in conjunction with the accompanying drawings, wherein Fig. l is a front elevational view of the apparatus, a portion thereof being shown in section;

Fig. 2 is a fragmentary sectional view taken substantially along the line 2--2 of Fig. 1;

Fig. 3 is a fragmentary detailed view illustrating the general structure of the. fluid controlling element;

Fig. 4 is a plane development showing a pattern of the knitted structure made with the apparatus, and

Fig. 5 illustrates another type of non-circular core which may be covered.

Referring now to the drawings, particularly Fig. l, the apparatus comprises a stationary support or frame l centrally apertured and having a cylindrical portion ll integral therewith and extending vertically therefrom. Disposed in the cylindrical portion H is a sleeve l2 threaded at its lower end to receive a nut I3 for securing the sleeve against rotation in the frame Ill. The upper portion of the sleeve has an outwardly projecting annular portion I which rests upon the upper end of the cylindrical portion H and cooperates in the securing of the sleeve to the frame. The central aperture of the sleeve i2 may be of any desired contour to receive a needle bed IS, the contour of the needle bed, the inner aperture thereof, and the inner aperture of the sleeve, in this embodiment of the invention, being somewhat oval. These contours depend somewhat upon the contour of the core to be covered. For the purpose of illustration, a substantially flat core has been chosen, thus necessitating a somewhat oval formation of the needle bed [8 in order to position a desired number of needles 2| about the core.

The needle bed is grooved at 22 adjacent its lower end to receive projections of an adjusting ring 23 threadedly receivable in the nut l3 and arranged to be moved therein to adjust the position of the needle carrier relative to its thread supply. The ring 23 may be locked in any suitably adjusted position bya set screw 24.

Vertically extending grooves 26 are formed at selected spaced positions in the needle bed and extend at desired angles, as illustrated in Fig. 2, and with varying depths as illustrated in Fig. l to receive the needles 2| and permit reciprocatory movement thereof. These needles may be of the usual latch type, formed with projections 28 for forming connections with their respective pistons 29.

The pistons 29, in general, are formed of a resilient material such as neoprene, which serves not only as a definite body capable of performing the functions of a piston controlled by fluid under pressure but also has present therein flexible qualities capable of cushioning the ends of the piston strokes and the needle projections 28 removably embedded therein to eliminate breaking of the threads and needles caused by sudden stopping of the pistons. To provide means for taking the expansion load of the pistons 29 sleeves 30, shorter in length than the pistons, are disposed concentric therewith and formed with suit-- able slots to receive the projections 28. The sleeves 30 may be formed of any suitable material such as phenolized cambric. The pistons 29 with their sleeves 30 are reciprocally disposed in spaced apertures or cylinders 3| of a cylinder member 32. The arrangement of the cylinders is shown in Fig. 2. Adjacent each cylinder 3|, in the cylinder member 32, are passageways 34 and 35 extending in angular formation from the top and bottom, respectively, of the cylinder member to the outer wall thereof. Disposed between the cylinder member 32 and the annular portion [5 of the sleeve i2 is a disk 31 formed with pairs of apertures, one aperture of each pair being disposed in general alignment with its respective HIUHI passageway 35 and the other aperture of each pair being disposed in axial alignment with its respective piston 29 and cylinder 3|. Each of the pairs of apertures in the disk 31 are connected through groove 40 disposed in the upper surface of the annular portion |5, completing communication between the cylinders and the passageways 35. A disk 4| similar in structure to the disk 31 but slightly larger in outside diameter, is also formed with pairs of apertures similarly associated with their respective cylinders 3| and passageways 34 and joined by grooves 42 formed in a head plate 43. The head plate 43 together with the disk 4| are secured to the cylinder member 32 and provided with central apertures of contours to receive the needle bed l8. In a similar manner the sleeve l2 with its annular flange |5 together with the disk 31 are secured to the cylinder member 32, thus forming a stationary unit consisting of the needle bed l8, the sleeve I2, the cylinder member 32, and all of the other members carried thereby or secured thereto. This unit of members of course is connected to the frame l0 and may be removed therefrom by removing the nut I3.

Disposed concentrically with the annular portion l5, the disk 31 and the cylinder member 32 is a fluid controlling element 50 held against displacement by the disk 4| and mounted for rotary movement upon an annular boss 5| integral with the frame It]. The adjacent surface of the boss 5| and the element 50 are provided with smoothly flnished surfaces to eliminate friction. If desired suitable bearings may be provided between these surfaces. A belt receiving portion 52 is integral with the element 50 to receive a belt 53, from a suitable power means not shown. An annular groove 54 is formed in the lower portion of the element 50 and cooperates with a similar groove 55 in a stationary fluid supply ring 56 so that at all times during the rotary movement of the element the annular compartment formed by the grooves 54 and 55 will be in communication with a fluid supply line 51 leading to a suitable supply means (not shown). The ring 56 is mounted against movement on the frame In by suitable means such as screws or the like.

As shown mainly in Fig. 3, attention also being directed to Figs. 1 and 2, two rows of spaced grooves are formed, each row consisting of intake grooves 60 and exhaust grooves 6| alternately positioned. The intake grooves 60 are of greater length than the exhaust grooves and are positioned in staggered relation, that is, the intake grooves of one row are in general vertical alignment with the exhaust grooves of the other row. Each exhaust groove has disposed in communication therewith an exhaust port 63 which extends through the element and is open to the atmosphere. Each intake groove has a passageway 64 which extends through the element to the groove 54 for communication with the fluid supply. The annular rows of grooves are positioned to be moved into registration with their respective passageway 34 or 35 during the rotation of the element.

The means for supplying threads to the needles consists of an annular bracket 10 mounted rigid- 1y upon the element 50 in any suitable manner and having supports spaced as desired for thread supplies or cops 1|. Extending vertically from and mounted upon the bracket 10 are uprights center for the free passage of the core 20 therethrough. Carried by the cross member at its center is a disk 15 centrally apertured and conditioned to removably and adjustably receive thread guides 16, the lower ends of the thread guides being apertured so that the threads may pass therethrough.

During the operation of the apparatus the core 20 is advanced in the direction of the arrow (Fig. 1) by suitable means (not shown) and at a desired speed, the needle carrier and the other associated parts remaining stationary while the element 50 is rotated to introduce a fluid under pressure at predetermined intervals to the cylinders to cause actuation of the pistons, resulting in movement of the needles to knit a covering on the core.

The piston shown in Fig. 1 is in its upper position ready to begin its downward movement and thus move the needle associated therewith downwardly and form a loop in the knitted covering. When in this position the fluid under pressure is forced from the tube 51 into the compartment formed by the recesses 54 and 55, through the passageway 64, the recess 60, the passageway 34, the adjacent aperture in the disk 4|, the groove 42, the aperture in the disk 4| in axial alignment with the piston, and thus entering the cylinder 3|, causing downward movement of the piston. The speed of this downward movement depends upon the pressure of the fluid supply and regardless of the speed of the piston it will come to a cushioned stop at the end of its stroke due to the resiliency of the piston itself. The pressure of the fluid supply and the speed of rotation of the element 50 are such that the pistons are moving continuously at a predetermined high speed excepting at the beginning and end of each stroke. At the end of each stroke the piston strikes one of the disks, yet the portion thereof carrying the needle continues to a cushioned stop. The material of the piston at the projection of each needle further aids in bringing the needle to a cushioned stop. The flexed material, at the needle projections and at the engaged end of each piston when the piston completes its stroke, in assuming its normal unflexed condition starts movement of the needle in the opposite direction before the piston is brought into association with the fluid pressure. This results in an easy ending of one stroke and the beginning of another.

The element 50 may be rotated in either direction but for the purpose of illustration let it be assumed that it is rotated in a clockwise direction (Fig. 2). The piston shown in Fig. 1 in moving downwardly has exhausted the air from the cylinder 3| beneath the piston through the aligned aperture in the disk 31, the groove 40, and the other aperture in the disk 31, the passageway 35, the adjacent exhaust groove SI, and the exhaust'passageway 53. When this same piston is moved to the next position the lower end of the cylinder 3| will be brought into communication with an intake groove 60, completing communication between the fluid supply and the cylinder to cause upward movement of the piston and its associated needle. The fluid in the cylinder above the pistons will be exhausted to the atmosphere, the upper portion of the piston having been brought into communication with an exhaust groove 5| and an exhaust port 63. This action is continued throughout each cycle for each piston and associated needle. Therefore, at intervals during the rotation of the element 50, carrying with it the thread supplies, certain of the pistons will be moved in the active or downward stroke to receive a thread and form a loop in the knitted covering, at which time the other pistons will be moved upwardly to position their needles for their active or downward strokes. Any desired number of needles may be employed, depending upon the cross sectional area of the core to be covered. Furthermore, any desired number of thread supplies may be employed, this, however, depending upon the number of pairs of operating positions effective in the element 50. It is important that a thread be positioned for each needle at the beginning of its downward stroke. Therefore, as each needle requires two operating positions to complete a loop one thread supply is provided for each pair of operating positions.

In the embodiment shown in Fig. 2 the general formation of the needle bed, the arrangement of the needles therein, and the central aperture therethrough is substantially elliptical, and with this structure a covering may be formed on cores having cross sectional contours other than that shown, provided, however, that the cores may be passed through the central aperture of the needle bed. In other words, this embodiment is capable of forming covers on cores of various shapes within its capacity. It is obvious from this embodiment that various noncircular cores may be covered, the problem to be considered being the positioning of the needles about the core 30 so as to form a covering wherein the threads are connected at substantially equally spaced positions about the core.

If other types of cores, for example, the rectangular core 80 shown in Fig. 5, are to be covered, the needle carrier, the aperture therethrough, and arrangement of the needles therein may be of a contour similar in general to the core 80. Such an arrangement of the elements is believed obvious in view of the structure shown in Figs. 1 to 3 inclusive and it is not believed necessary to show in detail such structure as to set forth this additional embodiment of the invention.

It is apparent from viewing Fig. 1, that by removing the nut l3, across member H and the elements carried thereby, the needles I O, the sleeve i2 together with the structure resting upon the annular portion l5 of the sleeve including the disk 31, the cylinder member 32 with its pistons and associated needles, the disk I, and the annular member 43 may be removed as a unit and another unit of a similar structure differing only in the general contour of the needle bed, the central aperture, the arrangement of the needles and their associated pistons, may be inserted in place and secured therein by the same nut 13. This conditions the apparatus to apply a knitted covering of a wide variety of non-circular cores with the use of a small number of removable units.

The number of needles required may vary, depending upon the cross sectional area of the core being covered, and thus varying the number of -wales required. Any desired number of needles Search Boon out departing from the spirit and scope of the invention as pointed out in and limited only by the appended claims.

What is claimed is:

1. In a covering forming apparatus, means to knit a covering on a non-circular core while advancing comprising knitting needles, a thread supply therefor, means to position the needles in non-circular formation about the core, and fluid controlled means to actuate the needles.

2. In a covering forming apparatus, a plurality of needles, a stationary needle bed therefor apertured for the advancement of a non-circular core therethrough, a thread supply for the needles, fluid controlled means to actuate the needles to knit a covering on the core, an element to control the fluid, and means to move the element and thread supply relative to the needle bed.

3. In a covering forming apparatus, a knitting needle, a thread supply therefor, and an element to move the needle flexibly connected thereto to cushion movement of the needle.

4. In a covering forming apparatus, knitting needles, a thread supply therefor, and fluid controlled pistons to impart reciprocatory strokes to the needles and cushion the ends of the strokes.

5. In a covering forming apparatus, knitting needles, a thread supply therefor, and flexible means to impart reciprocatory strokes to the needles and cushion the ends of each stroke and the beginning of the next stroke.

6. In a covering forming apparatus, knitting needles, a thread supply therefor, flexible fluid controlled pistons to impart reciprocatory strokes to the needles and cushion the ends of the strokes, and means to limit expansion of the pistons.

'7. In a covering forming apparatus, knitting needles, a thread supply therefor, and fluid controlled means to impart reciprocatory strokes to the needles including flexible pistons connected to the needles.

8. In a covering forming apparatus, knitting needles, a thread supply therefor, fluid controlled means to impart reciprocatory strokes to the needles including pistons having rigid cylinder engaging portions and flexible abutting portions, and cylinders for the pistons.

9. In a covering forming apparatus, a fluid controlling element, and a knitting unit removably receivable in the controlling element including needles, a needle bed therefor, and means actuated by fluid under pressure controlled by the element to actuate the needles.

10. In a covering forming apparatus, a rotary fluid controlling element, and a knitting unit removably receivable in the controlling element including needles, a needle bed therefor, means actuated by fluid under pressure controlled by the element to actuatethe needles, and means to hold the unit against rotation.

11. In a coveringforming apparatus, a plurality of needles, a needle bed therefor apertured to receive a non-circular core while advancing, means to adjustably support the bed and hold it against rotation, a cylinder member with cylinders therein disposed adjacent the needles in the bed, pistons disposed in the cylinders and connected to their respective needles, a controlling element disposed concentric with the cylinder member and rotatable relative thereto to control fluid under pressure for the actuation of the pistons, means to rotate the controlling element, and thread supplies for the needles supported for rotary movement with the controlling element.

12. In a covering forming apparatus, a rotary fluid controlling element having a circular aidal aperture therein, a knitting unit with a circular outer periphery removably receivable in the element and having a non-circular aperture for the advancement of a non-circular core therethrough, needles positioned in the unit about the aperture, a thread supply for the needles, and means to cause rotation of the element to cause actuation of the needles to knit a non-circular covering on the core.

13. In a covering forming apparatus, a rotary fluid controlling element having a circular axial aperture therein, a knitting unit with a circular outer periphery removably receivable in the element and having a non-circular aperture for the advancement of a non-circular core therethrough, needles positioned in the unit about the aperture, a thread supply for the needles, means to cause rotation of the element to control a fluid under pressure, and means actuated by the fluid under pressure to actuate the needles to knit a non-circular covering on the core.

14. In a covering forming apparatus, a rotary fluid controlling element having a circular axial aperture therein, a plurality of knitting units with circular outer peripheries selectively receivable singly in the element and having non-circular apertures varying in contour with non-circular cores arranged to be covered, needles positioned in each unit in formation conforming to the apertures therein, means to removably secure one or the knitting units in the element, and means to cause rotation of the element to cause actuation of the needles to knit a non-circular covering on a non-circular core.

15. In a covering forming apparatus, a knitting needle having a projection, a thread supply therefor, and fluid controlled means to impart reciprocatory strokes to the needle including a flexible piston apertured to receive the said projection to cushion the needle.

16. In a covering forming apparatus, a knitting needle having a projection, a thread supply therefor, and fluid controlled means to impart reciprocatory strokes to the needle including a flexible piston apertured to receive the said projection to cushion the needle at the projection and cushion the ends of the strokes thereof.

17. In a covering forming apparatus, means to singly knit coverings on non-circular cores while advancing comprising knitting needles, a thread supply therefor, units to support the needles in varying non-circular formation similar to crosssectional contours of cores to be covered, means to support the units singly to form a uniform knitted covering on a core, and means to actuate the needles.

BEN K. FORD.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3543280 *Nov 30, 1967Nov 24, 1970Knitting Machinery CorpCircular knitting machine needle stem
US5222380 *May 20, 1992Jun 29, 1993Lonati S.R.L.Pneumatic service circuit for circular knitting machine service devices
US5368906 *Aug 13, 1991Nov 29, 1994Aerospatiale Societe National IndustrielleDevice for the thermic protection of the internal wall of a hollow structure subjected to an ablative flow and its production method
US5617743 *Mar 12, 1996Apr 8, 1997Rednour; Raymond J.Apparatus for knitting about a traveling strand