Title:
Removably mounting extractor shafts
United States Patent 2351361


Abstract:
This invention relates to improvements in the method of and means for rotatably mounting the individual shafts of a thread extracting machine in which the loose threads from fibrous materials, such as cotton sweeps, and the like, are separated from the rest of the material. An object of the...



Inventors:
William, Ockrant
Kinney Jr., John W.
Application Number:
US38931641A
Publication Date:
06/13/1944
Filing Date:
04/19/1941
Assignee:
Ockrant
Primary Class:
Other Classes:
366/331
International Classes:
D01G9/14
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Description:

This invention relates to improvements in the method of and means for rotatably mounting the individual shafts of a thread extracting machine in which the loose threads from fibrous materials, such as cotton sweeps, and the like, are separated from the rest of the material.

An object of the present invention is to provide simple, yet effective means for removably mounting the extractor shafts of thread extracting machines.

A further object ,of the invention is to provide a device wherein only the active portion of an extractor shaft, around which the extracted threads become entwined, is removably mounted between rotatably disposed stub shafts which are secured to and carried by the side walls of the device.

These and other objects are attained by the means described herein and disclosed in the accompanying drawing in which: Fig. 1 is a fragmental vertical sectional view taken laterally through the housing of a thread extractor.

Fig. 2 is an enlarged fragmentary view, partly in section, of the right and left ends of the removable thread extractor shaft of Fig. 1 operatively secured to a pair of fixed, rotatably mounted stub shafts.

Fig. 3 is a sectional view taken on line 3-3 of Fig. 2,.but turned 900 thereto in a counterclockwise direction.

Fig. 4 is a view similar to Fig. 2, but disclosing a modified form of extractor shaft and stub shaft mounting.

Fig. 5 is a sectional view taken on line 5-5 of Fig. 4.

It is common practice in the art of extracting loose threads from masses of fibrous materials, such as cotton sweeps and the like, to ,subject such materials to successive action of a plurality of revolving shafts, each of which includes a plurality of radially projecting pins. The longer of the loose threads are extracted from the mass of fibrous material by reason of being entwined or wrapped around the revolving shafts, whereas the shorter threads are extracted by reason of being wrapped around the projecting pins. Quite obviously the efficiency, or ability of an extractor to extract loose threads from a mass of fibrous material is seriously impaired as the quantity of extracted threads builds up or accumulates on the various extractor shafts and pins.

Heretofore the threads entwined or wrapped about the extractor shafts and pins were removed by stopping the machine, and then cutting the threads from the shafts and pins. However, since considerable time is required to cut such threads from the shafts, the entire machine was rendered useless until the thread cutting operation had been completed. The time required to cut the threads from the average extractor usually approximated two hours, wherefore it is apparent that in any working day the machine would be idle for two hour intervals while the threads were being removed.

One of the primary objects of the present invention is to provide a thread extracting device, the individual thread extractor shafts of which are individually removable, and interchangeable with other similar shafts. Such construction makes it not only possible, but commercially feasible to bodily remove the various thread ladened extractor shafts and replace them with other similar shafts from which the threads have been previously cut. By reason of the unique construction of the extractor shafts, as hereinafter more fully disclosed, it is but a simple matter to remove and replace the beater shafts of an extractor, in a very short period of time, such as ten minutes. By reason of the time thus saved, it is possible to practically double the output of such device.

0 At the outset it should be understood that the present invention is not concerned with, nor directed to any particular type of thread extractor device, but is directed to the particular means disclosed in the drawing for removably ;5 mounting thread extractor shafts in any suitable machine which is adapted to extract the loose threads from fibrous substances, such as cotton sweeps, and the like. If desired each thread extractor shaft may be of the general uo nature disclosed in the copending patent application of William Ockrant, filed December 30, 1940, Serial No. 372,306.

As disclosed in Fig. 1, the numeral 10 represents generally a thread extractor shaft which extends laterally between spaced side walls or support members iI and 12 of a suitable extractor chamber. A plurality of agitator arms or pins 13 project radially from shaft 10. These pins are adapted to impart a rotary motion to the fibrous material from which the loose threads are to be extracted whereby the loose threads will be wrapped or entwined around shaft 10, and pins 13. In order to support the fibrous material from which the loose threads are being extracted, a pan, denoted generally by the numeral 14, may be secured below and spaced from the arcuate path described by the ends of the pins 13, as is the common practice.

A rotary motion may be imparted to shaft 10 by any suitable means, such as a chain driven sprocket 15 secured to the rear end of the shaft, as shown.

As clearly disclosed in Fig. 1 it will be observed that the present method of removably mounting thread extractor shaft 10 may be employed in a device similar to that disclosed in the Ockrant co-pending patent application, wherein fibrous materials are simultaneously opened, blended and cleaned as the threads are removed, and wherein the rate of lineal travel of material through the device is controlled by means of adjustable depending baffle plates 24 pivotally suspended from their upper longitudinal edges for movement on opposite sides of a perpendicular disposed midway between adjacent beater shafts.

With reference to Figs. 2 to 5 inclusive it will be observed that only the active portion of beater shaft 10 around which the extracted threads are wrapped is removable from the device, thereby eliminating the need for disconnecting and then reconnecting the power drive of pulley 15 incident to the removal and replacement of shafts 10. As disclosed in Fig. 2 beater shaft 10 is shorter than the lateral distance between side walls 11 and 12. Opposite ends of the shaft are adapted to be securely, though releasably mounted to a pair of rotatably mounted stub shafts 30 and 31 respectively. The stub shafts may be rotatably mounted in bearings 32 and 33 fixedly secured to and carried by side walls II and 12.

In order to preclude movement of stub shafts 30 and 31 along their longitudinal axis they may be provided with a thrust collar 34 mounted between ball bearings 35 as illustrated, whereby each stub shaft will be freely rotatable about a common longitudinal axis.

As disclosed in Figs. 2 and 3, the opposite ends of shaft 10 may be provided with a projecting tongue 36 which is adapted to be received within a complementary groove 37 provided in the inner ends of stub shafts 30 and 31. In the preferred embodiment of the invention tongue 36 is of a lesser width than the diameter of the stub shafts for providing a supporting web 38 below the bottom edge 39 of tongue 36, as best disclosed in Fig. 3. Such construction provides means for supporting shaft 10 relative to the stub shafts 30 and 31 while pins 40 are being inserted into, or withdrawn from a diametric hole 41 disposed through the aligned and engaging portions of shaft 10 and the stub shafts 30 and 31. Inasmuch as pin 40 does not transmit torque between shaft 10 and the stub shafts, but merely functions to prevent the unintentional, or accidental disengagement of tongue 36 from groove 37, this pin may be fairly light and releasably securable in place by any suitable means, such as by way of a friction fit, or the like.

In the modification disclosed in Figs. 4 and 5 6 it will be observed that stub shaft 30 is provided with a taper 50 to provide a conic socket which is adapted to be engaged by a tapered end or conic tongue 51 of thread extractor shaft 10.

Stub shaft 30 may be suitably mounted as dis- 7 closed in Fig. 2. The other end of shaft 10 may be provided with a tapered stepped offset 52 which is adapted to engage a complementary tapered stepped offset 53 provided in the free end of stub shaft 31. Shaft 10 may be operatively 75 secured to stub shafts 30 and 31 by means of a retainer pin 54 which extends axially through stub shaft 31 and into the end of shaft 10, as shown by the broken lines. The removal of shaft 10 may be effected by withdrawing retainer pin 54 outwardly until the right end of shaft 10 may be lifted upwardly for disengaging the abutting edges of the complementary tapered stepped offsets 52 and 53. By lifting upwardly on the thus free right end of shaft 10 the engagement between the complementary conic, or tapered portions of the left end of said shaft and the inner end of stub shaft 30 may be effected, whereby shaft 10 may be removed from the device by one operator standing at side wall 12. Conversely, when another shaft 10 is to be mounted between stub shafts 30 and 31, it is first necessary to introduce tapered end 51 of shaft 10 into the tapered recess 50 of stub shaft 30, after which the tapered stepped offset 52 may be brought into engagement with the corresponding offset 53 of stub shaft 31. It should be noted that by reason of the taper provided on the right end of shaft 10 the tapered left end 50 will snugly engage the complementary taper 51 of stub shaft 30 as the right end of shaft 10 is brought into axial alignment with stub shaft 31.

After being so aligned, retainer pin 54 may be inserted for positively locking shaft 10 to stub shaft 31. If desired the outer end 60 of retainer pin 54 may be provided with a female socket 61 engageable by a suitable wrench for causing said pin to make threaded engagement with a tapped hole, (not shown) provided in the hub of sprocket 15. From the foregoing it is apparent that it is but a simple matter to bodily remove one or any number of thread extractor shafts from the device whenever such shafts become entwined with a large quantity of extracted threads. By 0t immediately replacing the removed shaft with a second clean shaft, the machine may be immediately thereafter placed in operation. The threads entwined about the removed shaft may then be cut off at the convenience of a machine operator, while the machine is operating on the replaced shaft. In this manner the machine is rendered inoperative only during those periods of time within which a thread ladened shaft is being removed and a clean shaft is being replaced. This is in sharp contrast to the method heretofore followed wherein the entire machine was rendered inoperative while the threads were cut from the shafts while mounted in the machine.

5 It is to be understood that various modifications and changes in the structural details of the device may be made, within the scope of the appehded claims, without departing from the spirit of the invention.

What is claimed is: 0 1. In a device of the class described, the combination which comprises a pair of spaced side walls, a pair of rotatable stub shafts carried by and secured one to each side wall, the stub shafts 5 comprising a pair fixed against axial displacement and being rotatable about a common axis, a removable shaft adapted to be supported by and between a pair of stub shafts, and means for releasably interlocking the opposite ends of 0 said shaft to each of said stub shafts whereby said shaft is rotatable with and about the axis of rotation of said stub shafts.

2. In a device of the class described, the combination which comprises a pair of spaced support members, a pair of rotatable stub shafts carried by and secured one to each support member for rotation about a common axis and against axial displacement, a shaft adapted to be removably supported by and between said stub shafts, the adjacent ends of said shaft and stub shafts provided with interlocking means adapted to transmit a driving torque from one of said stub shafts through said removable shaft to the other stub shaft, means for precluding accidental or unintentional disengagement of said interlocking means, and means for driving one of said stub shafts.

3. In a device of the class described, the combination which comprises a pair of spaced support members, a pair of rotatable stub shafts carried by and secured one to each support member for rotation about a common axis, a shaft adapted to be removably supported by and between said stub shafts, one end of said removable shaft and the inner end of a stub shaft provided with interfitting complementary conics, the other end of said removable shaft and the inner end of the other stub shaft being provided with interfitting complementary tapered-stepped portions adapted to transmit torque from the stub shaft to said removable shaft and to maintain an interfitting relationship between the other end of said removable shaft and the other stub shaft, means for releasably locking the complementary, interfitting tapered-stepped portions of said shafts together, and means for imparting a rotary motion to the torque transmiting stub shaft.

4. In combination with a thread extractor device which includes a housing having a pair of laterally spaced walls, of a thread extractor shaft extending between said walls, said shaft comprising a central removable portion and a pair of rotatable stub shafts carried by and secured against axial displacement one to each wall, means for releasably securing the opposite ends of said central removable portion to said stub shafts for rotation with said stub shafts, and drive means on one of said stub shafts for imparting a rotary motion to said thread extractor shaft.

5. In a device of the class described, the combination with a pair of laterally spaced support members, of a pair of bearings carried by and secured in spaced axial alignment one to each support member, a pair of stub shafts rotatable one in each of said bearings and confined thereby against axial displacement, the adjacent ends of said stub shafts projecting outwardly from their respective bearings, a closed bottomed Ushaped slot provided in the adjacent ends of said stub shafts, a beater shaft removably supported by and between said stub shafts, the opposite ends of said beater shaft terminating in Ushaped tongue members which are complements of the U-shaped slots of said stub shafts, said tongue members releasably interlocking the slots of said stub shafts, and releasable means engaging each complementary tongue and slot for precluding accidental or unintentional disengagement of said interlocking parts.

6. In a device of the class described, the combination with a pair of laterally spaced support members, of a pair of bearings carried by and secured in spaced axial alignment one to each support member, a pair of stub shafts rotatable one in each of said bearings and confined thereby against axial displacement, the adjacent ends of said stub shafts projecting outwardly from their respective bearings, a closed bottomed Ushaped slot provided in the adjacent ends of said stub shafts, a beater shaft removably supported by and between said stub shafts, the opposite ends of said beater shaft terminating in Ushaped tongue members which are complements of the U-shaped slots of said stub shafts, said tongue members releasably interlocking the slots of said stub shafts, each pair of interlocking tongues and slots having a common passageway extending therethrough, and a pin removably receivable within said passageway for precluding accidental or unintentional disengagement of a tongue from its cooperative slot.

7. In a device of the class described, the combination with a pair of lateral spaced support members, a pair of bearings carried by and secured in spaced axial alignment one to each support member, a pair of stub shafts rotatable one in each of said bearings and confined thereby against axial displacement, the adjacent ends of said stub shafts projecting outwardly from their respective bearings, a beater shaft removably supported by and between said stub shafts, complementary conical tongue and socket members provided on the adjacent end of one stub shaft and on one end of said beater shaft, complementary interfitting stepped portions provided on the end of the other stub shaft and the other end of said beater shaft, said last mentioned stub shaft provided with a passageway extending axially therethrough, that end of said beater shaft which is complementary to said last mentioned stub shaft having a passageway disposed axially thereof, the passageways of said stub shaft and beater shaft adapted to be disposed in axial alignment when the opposite ends of said beater shaft are engaged with their respective stub shafts, and a member insertable into said aligned passageways for releasably 65 locking said beater shaft to and between said stub shafts and for precluding accidental or unintentional disengagement of said interlocking parts.

WILLIAM OCKRANT.

JOHN W. KINNEY, JR.