US1044993A - Doffer. - Google Patents

Description

BEST AVNLABLE COPY H. D. COLMAN.

DOFFBB- APPLIOATIOI rum: 110v. 1, 1910.

1,044,993. Patented Nov. 19, 1912.

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APPLIOATIOI FILED 1on1. 1910.

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APPLICATION FILED NOV. 7,1910. 1,044,993. Patented Nov. 19, 1912.

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BEST AVAILABLE COPY UNITED STATES PiTENT OFFICE.

HOWARD D. COLMAN, OF ROCKFORD, ILLINOIS, ASSIGNOR TO HOWARD D. COLMAN', LUTHER L. MILLER, AND HARRY A. SEVERSON, COPARTNEBS DOING BUSINESS AS BABIBEB-COLMAN COMPANY, OF ROCKFORD, ILLINOIS.

DOFFEB.

Specification of Letters Patent.

Patented Nov. 19, 1912.

Application filed November 7, 1910. Serial No. 590,970.

To all whom it may concern:

Be it known that I, HOWARD D. Commas, a citizen of the United States, residing at Rockford, in the county of Winnebago and State of Illinois, have invented certain new and useful Improvements in Dotl'ers, of which the followin is a specification.

This invention re ates to machines for replacing full bobbins on spinning frames with empty bobbins, and particularly to a dofler of the traveling type, that is to say, a dotting machine adapted to'travel along the front of the spinning frame to doll and don bobbins in succession. It has been proposed to propel the dofi'er along the spinnin frame by means of a inion on the do er meshing with a rack ar extending along the front of the spinning frame, but this method of propulsion, as heretofore practised, involves difficulties arising from the fact that the spindles on a given frame are not always spaced a uniform distance apart, ant. from the further fact that the dofier is intended to operate upon a number of spinning frames, each of which may differ slightly with reference to the spacing of the spmdles.

It is the object of this invention to provide means for sensitively controlling the traveling movement of a dofier, whereby the difiiculties alluded to are obviated.

In the accompanying drawings Figure 1 is a fragmental front elevation of a dofler embodying the features of my invention, the dofler being shown in o erative relation to a portion of a spinning rame. Fig. 2 is a fragmental section on line 2 2 of Fig. 1. Fig. 3 is a section on line 3 of Fig. 2. Fig. 4 is a sectional view of the parts shown in Fig. 2, the view being taken substantially in the plane of dotted line 4 4 of Fig. 2. Figs. 5 and 6 are detail views showing different positions of the sensitive feed-controlling means.

My invention may be applied to traveling doffers of various types. By way of exam le, I have shown a dofler comprising a rigid framework or carriage consisting in art of twonJiright members 1, a middle bracket 2, an" a lower bracket 3. Said framework may be supported upon the s inning frame for traveling movement t erealong by any suitable means, as, for example, a track 4 fixed to the spinning frame, grooved rollers 5 carried by the dofi'er framework and arranged to run upon the track 4, and a bracket 6 carryin a roller 7 arranged to bear against the %orward edge of the lower flange 8 of the spindle rail of the s inning frame.

The mechanisms 0 the dotfer are actuated and the dofier caused to travel along the front of the spinning frame by any suitable means, as, for example, a horizontal shaft 9 supported in the bracket 2 and having a hand crank 10 fixed thereto. A vertical shaft -11 1S 1ournaled in suitable hearings in the dofl'er framemork, two of said bearings being shown in the drawings at 12 and 13. Sand vertical shaft is connected with the hor zontal drive shaft, in the present em bodiment, by means oftwo s iral gears 14 15 of equal diameter, the an e of the gear teeth being such that the shzt 11 is rotated through one-half revolution in each rotation of the shaft 9. Fixed to the lower end of the vertical shaft 11 is a spur gear wheel 16 by means of which motion is transmitted to the dofier-propelling mechanism. In this instance, the dotfer mechanisms are actuated through one cycle of operation in each rotation of the hand crank 10, and the gear wheel 16 is rotated through a half revolution in each cycle of operation of the dofiing mechanisms.

The dotfer is arranged to be propelled along the front of the spinning frame by means comprising a toothed bar herein shown as a rack 17 attached to the spinning frame in any suitable manner, as by being formed integral with the dofiensupporting track 4. Cooperating with said toothed bar is a propelling element consisting, in this instance, of a pinion 18 which is supported for rotation upon a stud 19 fixed in the bracket 3. The pitch circle of this pinion is somewhat greater than the average distance between spindles, say one-sixteenth of an inch greater. Fixed with relation to the pinion 18 is a ratchet wheel 20. A gear wheel 21 is rotatably mounted upon the stud 19 and meshes with the spur gear wheel 16. The pitch circle of the ar 21 is one-half that of the gear 16. Fix to the gear wheel 21 is a disk 22 that carries a double awl or pallet 23, the teeth 24 and 25 of w ich are ada ted to engage with the teeth of the rate et wheel 20. A spring 26 tends to rock the pawl 23 to throw the tooth Q-k into engagement with the ratchet wheel.

A bracket 27 is fixed to the bracket 3 and extends toward the spinning frame. In the rear end of said bracket is mounted a pivot pin 28 to which is fixed a feeler finger 2%,)

arranged in position to be carried into contact with successive spindle bases (1 during the travel of the dott'er. Said feeler finger has a rearwardly-extending arm 30. and to this arm is connected a coiled spring 31 attached at one end to the lower side of bracket 27, said spring tending to hold the feeler finger in position to engage the spindle-bases.

32 is a stop pin for limiting the action of the spring 31. The finger 29 is free to swing upon its axis as the dofi'er travels until said finger snaps off from the spindle-base into position to be engaged by the next succeeding base. A finger 33 is fixed to the pivot pin 28 of the feeler finger and carries a projection 34 lying in the horizontal plane of a locking member 35 pivotally supported upon the pin 28. A torsion spring 36 secured at one end to the pivot pin 28 and at its other end to the locking member 35 tends to swing said locking member into its operative position, as will be presently ex lained. \Vhen the spring 31 swings the eeler finger 29 into the position represented in Fig. 2, the projection 34: upon the finger 33 swings the locking member 35 out of operative position. A pawl controlling arm 37 is pivotally supported at 38 upon the bracket 27. said arm having a cam surface or dwell 39 thereon curved upon the arc of a circle concentric with the orbit of the double pawl 23, as shown in Fig. 2, the entering end of said cam surface being defined by the shoulder 40. The arm 37 has a rearward extension 41 which is notched at 42 to receive the end of the locking nember 35. A spring 43 tends to hold said extension against a stop pin 44 and in position to be engaged by the locking member. \Vhen the arm 37 is locked against movement, the shoulder 40 lies in position to be engaged by a projection t5 upon the rear end of the double pawl 23, whereby the tooth 24 of said pawl is lifted out of engagement with the ratchet wheel until the projection 45 runs off the cam surface 39, when the spring 26 throws the tooth 25 out and the tooth 24 in.

In operation the doffer is actuated by continuously rotating the shaft 9. whereby the pawl-carrying disk 22 is rotated through one revolution during the time that the doifer is traveling from one spindle to the next. The manner in which the propelling mechanism is sensitively controlled may best be understood by reference to Fig. 2, wherein the tooth 24 is shown as driving the feeding element 18 through the ratchet wheel 20. The feeler finger 29 has just contacted a BEST AVAILABLE COPY -spindlebase a but it may be assumed that the projection 45 on the pawl has previouslv swung the arm 37 slightly so that the lock. ing member 35 cannot drop into the not h l2. Continuing movement of the disk will cause the projection l5 to push the arm 37 aside (Fig. 5). and thus the pawl will not be affected by the engagement of the feeler finger with that particular spindle-base: but by the time the dotfer reaches the next operative position the feeler finger will have contacted the spindle-base before the projection 45 reaches the shoulder 40 (due to the fact that the pitch circle of the pinion 18 is greater than the distance between spindlebase centers) consequently the arm 37 will have been locked before the projection 45 reaches it, and said arm will throw the feeding tooth 2% out and the feeding tooth 25 in (Fig. 6). The teeth of the ratchet wheel 20 are so spaced with reference to the pawl teeth 24 25 that at each shift from one pawl tooth to the other lost motion will occur and the doffer travel will be suspended momentarily. Such a shift of the pawl teeth will take place when the projection *5 runs up the shoulder 40 and again when said projection leaves the surface 39, the two shifts causing the tooth 2t to advance from one ratchet tooth to the next. By reason of the retardation caused by the movement of the disk 22 with relation to the ratchet wheel, the contact of the feeler finger with the next succeeding spindle-base may not affectthe pawl. depending upon the spacing of the spindles.

It will be seen that the propelling mechanism tends to overrun, and that the feeler neans suspends the action of the propelling mechanism for a moment at sufficiently frequent intervals to keep the dofi'er in step with the spindles.

In Fig. 2. b indicates one of the vertical rods that operates the ring rail of the spinning frame. The presence of such rods does not affect the travel of the dotfer, since the pawl 23 is at the side of the disk 22 opposite to the arm 37 when the feeler finger 29 engages said rods.

I claim as my invention:

1. The combination, with a dotfer for spinning frames. of mechanism for propelling the dofl'er along a spinning frame. said mechanism tending to overrun, and means for engaging portions of the spinning frame for intermittently suspending the action of said propelling mechanism.

2. The combination, with a' dotl'er for spinning frames. of mechanism for propelling the dofi'er along a spinning frame, and means adapted to engage the spindlebases on the spinning frame for controlling said propelling mechanism.

3. In a dofler for spinning frames, a propelling mechanism compnsing a rotary propelling element adapted to coact with an element on the spinning frame, a pawl and ratchet mechanism for driving said rotary element. and means adapted to engage portions of a spinning frame for shifting said pawl in relation to said ratchet wheel.

4. In a doffer for spinning frames, a propelling mechanism comprising a rotary propelling element adapted to coact with an element on the spinning frame, means including a pawl and ratchet mechanism for driving said propelling element, and a pivoted feeler finger adapted to engage the spindle bases on a spinning frame for shifting said pawl in relation to said ratchet wheel.

5. In a dotfer for spinning frames, a rotatable propelling element adapted to coact with an element on the spinning frame, a. ratchet wheel supported to rotate with said propelling element, a rotary member carrying two feeding teeth adapted to engage and drive said ratchet wheel, and means adapted to engage the spindle bases on a spinning frame for shifting said teeth alternately into and out of engagement with said ratchet wheel.

6. In a dofl'er for spinning frames, a retary propelling element adapted to coact with an element on the spinning frame, a ratchet wheel supported to rotate with said propelling element, a member mounted for rotation on an axis concentric with the axis of the ratchet wheel, a double pawl ivoted on said rotary member and arrange to engage and drive said wheel, means tending to rock said pawl to place one of its teeth in engagement with said ratchet wheel. and means adapted to engage portions of the spinning frame for rocking said pawl in the opposite direction.

7. In a doffer for spinning frames, a propelling mechanism comprising a rotary propelling element adapted to coact with an element on the spinning frame. a ratchet wheel mounted for rotation with said propelling element, a double pawl supported for movement in an orbit concentric with the ratchet wheel and arranged to engage and drive said wheel, an arm adapted to operate said pawl. and means adapted to engage portions ofthe spinning frame for controlling said arm.

8. In a doffer for spinning frames, a propelling mechanism comprising a rotary propelling element adapted to coact with an element on the spinning frame, a ratchet wheel mounted for rotation with said propelling element. a double pawl supported for movement in an orbit concentric with the ratchet wheel and arranged to engage and drive said wheel. a spring tending to hold one tooth of said pawl in engagement with said ratchet wheel, a member located at one side of the orbit of said pawl and BEST AVAILABLE COPY adapted to engage the latter to rock the same against the tension of said spring, and means adapted to engage portions of the spinning frame for controlling said last mentioned member.

9. In a doffer for spinning frames, :1 propelling pinion whose pitch circle is only approximately equal to the average distance between spindles on a spinning frame. a rack engaged by said pinion, and means controlled by the spinning frame for rotating said pinion.

10. In a dofi'er for spinning frames, 3. propelling pinion whose pitch circle is slightly greater than the average distance between spindles on a spinning frame, a rack engaged by said pinion, means for rotating said pinlon, and sensitive means for intermittently suspending the action of said rotating means.

11. In a textile apparatus, a doifer framework, means for supporting said framework for traveling movement along a spinning frame, a propelling element carried by the doifer framework in position to engage a toothed portion on the spinning frame, and feeler means engaging portions of the spinning frame and controlling said propelling element.

12. In a textile apparatus, a doffer framework, means for supporting said framework for traveling movement along a spinning frame, a propelling element carried by the dofi'er framework in position to engage a toothed portion on the spinning frame, and means carried by the dotfer framework and adapted to engage the spindle-bases on the spinning frame for controlling said propelling element.

13. In a textile apparatus, a doffer framework, means for supporting said framework for traveling movement along a spinning frame, a propelling element carried by the doifer'framework in position to engage a toothed portion on the spinning frame, and a pivoted finger feeler carried by the doiter framework in position to engage the spindlebases on the spinning frame and arranged to control said propelling element.

14. In a dofter for spinning frames, a dolfer frame, a vertical shaft in said frame, means for rotating said shaft, a gear wheel fixed to the lower end of said shaft, a gear wheel mounted in said frame in mesh with the other gear wheel, the pitch circle of the second gear being one-half that of the first gear, a pawl rotated by the second gear, a ratchet wheel engaged by said pawl, and a drifter-propelling pinion adapted to engage a rack on a spinning frame and having a driving connection with said ratchet wheel.

15. In a dofier for spinning frames, a doffer frame, a vertical shaft in said frame, means for rotating said shaft, a gear wheel fixed to the lower end of said shaft, a gear BEST AVAILABLE COPY wheel mounted in said frame in mesh with the other gear wheel. the pitch circle of the second gear being one-half that of the first gear. a pawl rotated by the second gear. a i ratchet wheel engaged by the pawl. a tlotferl propelling pinion having a driving conneci tion with the ratchet wheel. and adapted to engage a rack on a spinning frame, the pitch circle of said pinion being slightly different from the average distance between spindles HOWARD D. COLMAN.

Witneeses BURT A. PETERSON, LOUISE A. Convex.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

It is hereby certified that in Letters Patent No. 1,044,993, granted November 19, 1912, upon the application of Howard D. Colman, of Rockford, Illinois, for an improvement in Dofiers, an error appears in the grant requiring correction as follows: In the granting clause, line 3, strike out the Words their successors or assigns, and insert the words copartners, doing business as Barber Colman Company, of Rockford, Illinois, their heirs or assigns; and that the said Letters Patent should be read With this correction therein that the same may conform to the record of the case in the Patent Ofiice.

Signed and sealed this 18th day of March, A. D., 1913.

[SEAL] I O. C. BILLINGS,

Acting Commissioner of Patents.

It is hereby certified that in Letters Patent No. 1,044,993, granted Noyember 19,

1912, upon the application of Howard D. Colman, of Rockford, Illinois, for an irriprovement in Dotfers, an error appears in the grant requiring correction as follows: In the granting clause, line 3, strike out the words "their successors or assigns, and insert the words oopartners, doing business as Barber- Colman Company,

of Rockford, Illinois, their heirs or assigns; and that the said Letters Patent should i be read with this correction therein that the same may conform to the record of the case in the Patent Ofiice.

Signed and sealed this 18th day of March, A. D., 1913.

[SEAL] I C. C. BILLINGS,

Acting Commissioner of Patents.

BEST AVAILABLE COPY It is hereby certified that in Letters Patent No. 1,044,993, granted November 19, 1912, upon the application of Howard D. Colman, of Rockford, Illinois, for an improvement in Dofi'ers, an error appears in the grant requiring correction as follows: In the granting clause, line 3, strike out the words assigns, and insert the words oopartners, doing business as Barber- Uohnan Company, of Rockford, Illinois, their lmJrs or assigns; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Ofiice.

Signed and sealed this ism day of March, A. 1)., 1913. s

' 0. 0. BILLINGSE;

Acting of Patents.

[emu] "their successors or

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