US707112A - Mechanism for converting motion. - Google Patents

Description

No. 707,I|2. Patentd Aug. I9, |902. J. HORBUCKS.

MECHANISM FOR CONVERTING MOTION.

@Application led Jan 10, 1902.)

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No. 7o7,||2. Patented Ag. I9, |902.

J. HRRCKS.

MECHANISM FUR CONVERTING MUTIUN.

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MECHANISM FOR CONVERTING MOTION. (Application leq Jan. 10, 1902.) (No Model.) a sheets-sheet a.

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UNITED STATES PATENT c* OFFICE. -w

JAMES I-IORROCKS, OF MANCHESTER, ENGLAND.

MECHANISM FoRfcoNvl-:Rrmc M oTloN.

SPECIFICATION forming part of Letters Patent No. 707,112, dated'August 19, 1902.

' Application iiled January 10, 1902. Serial No. 89,148. 'VINO model.)`

vwhich I have filed application for British Patent No. 19,202, dated September 26, 1901;) and I do hereby declare `the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains toma'ke and use the same.

My said invention relates to an improved combinationof mechanism for converting rotary motion 'into' reciprocating rectilinear motion. v Y

It is particularly advantageous forA operating the traversing thread-guide device used in winding machinery; but it .is also applicable to other purposes where a uniform velocity at lall parts of the travel, combined with a practically instantaneous reversal of the direction of motion, is required.

The accompanying drawings illustrate myV said invention as applied to the operation of the thread-guides of a winding-machine.

Figure 1 is a plan. Fig. 2 is a sectional elevation on the plane A B of Fig. 1. Figs. 3, 4, and 5 are enlarged views of details to be presently explained.

The shaft 1 of Fig. 2 is the main drivingshaft of a thread-winding machine. `2 is the end of the carriage which carries the threadguides and to which a reciprocating motion is to be imparted.

A v ertical shaft 3 derives continuous r0- tary motion through the bevel-wheels 3a 3b from the shaft l and transmits it to a pinion 4, secured to the upper end ofthe shaft 3. The pinion rotates in the direction of the arrow fw, Fig.4 l. 1

The pinion 4is provided with teeth on only a portion of its periphery.

A sliding traverse-block 5 has internal racks 5a 5b, With their teeth opposed to each other and set in such relative positions as to e11- gage alternately with the teeth of the pinion.

In Fig. 1 the teeth of vthe pinion are just commencing to engage with the rack 5EL and will drive the traverse-block 5 tothe right while the plain periphery of thepinion 4 is passing clear ofthe points of the teeth of the other rack 5b. Whenthe teeth of the pinion in their continued revolution come into engagement with the rack 5h, the traverseblock 5 will be driven a similar distance to the left, and so on. y

The method of obtaining a reciprocating motion from a pinion rotating between two racks is not in itself new, and I make no broad claim to such a combination.V

According to my present invention I form the teeth of the pinion and of the racks at the place where they first come into engagement with each other, of graduatedlengths. Thisis illustrated in Figa-13, 4, and 5. Fig. 3 is a plan. the traverse-block 5, seen in the direction of the arrow y of Fig. 3. The teeth oflthe rack are lettered from a to Z. Fig-5 is `an elevation in the direction of the arrowoo of Fig. 3L The pinion 4 is shown in fulllines. The teeth of the rack, with which it isj ust comi Fig. 4 is a sectional elevation of ing into engagement, are indicated by dotted lines. lThe lettering of the teeth in this glure is necessarily in the reverse order to Fig.

3. The pinion 4 (see Fig. 5) is undercut at 4' and 4b, and the teeth b c d e of the rack `are shortened in graduated or stepped fashion, so that the stepped overhanging portions of the pinion 4' 4b can pass clear over them until the advancing fore edge 4 of the pinion meets the half-tooth a of the rack when the latter begins to move. y The movement of the rack and the pinion now brings the fore edge 4d of the next overhanging part against the tooth b. The half-tooth 4e of the pinion comes next against the tooth c, and thereafter the full teeth of the pinion come into successive 'engagement with the other teeth ofthe rack. Although only four stepped teeth are shown by way of example it is to be understood that this may be varied to suit the pitch of the teeth and the diameter of the pinion. The object of the stepping is toenable the first -operating front face 4c of the pinionto reach Ythe tooth a without comi'nginto contact'fwith the other teeth. Thenumber of teeth on the pinion and the positionof the racks is so-arranged that there is the leastfpossiblelinterval of time between the last tooth of the pinion leaving one rack and the part 4 meeting the tooth a of the other rack. To minimize shock on the reversal of the motion, I use buffers of rubber or other suitable material. Two of these, 6 and 7, are mountedvon the rod 8, attached to and traveling with the carriage 2. The latter is connected by the rod 8EL to the traverse-block 5. A stop 9 is formed on a bracket 9 between the buffers. In addition to these buffers for cushioning the carriage 2 I use two circular buffers l0 and ll, covered with hide or other suitable material. The circular buffers are free to rotate on the pins on which they are mounted in slotted carriers 10a and 1l, by means of which they may be very accurately adjusted, so as to cushion the stroke at the most suitable point. A similar circular buer l2 is mounted on a pin on the pinion 4c and is carried around by the latter, so as to come alternatelyinto contact with the buii'ers l0 and ll just before but almost simultaneously with the contact of the part 4 of the pinion with the rack. Owing to the circular buers being free to rotate ou their pins and the way the buer 12 meets the buffers l0 and 1l, a cushioned rolling contact or impact is produced which absorbs the momentum of the moving parts and produces a comparatively smooth reversal of the motion. The buers 6 and 7 are also adjustable on the rod 8 to enable them to be set so that the shock on reversal may be partly taken up by them. The best result is obtained when the buffers lO, 11, and l2 are so set with regard to each other that they get the traverse-block 5 slightly under Way in the reverse direction just before the pinion comes into action, the pinion, so to say, being allowed to follow up the traverse-block. By carefully proportioning the number of teeth to the bare part of the pinion and suitably setting the buers a practically instantaneous reversal is obtained of great value in yarn or thread winding machines, particularly those in which yarn is wound on tubes or bobbins without heads, where a very sudden reversal is necessary in order to properly build up the yarn on the tube.

What I claim as my invention, and desire to secure by Letters Patent, is-

l. The combination of a continuously-rotating shaft, a pinion with teeth of graduated lengths, a reciprocating traverse-block, having internal racks with teeth of graduated lengths, and buffers for minimizing shock and assisting the reversal of the reciprocating motion substantially as and for the purpose set forth and shown.

2. The combination of a reciprocating traverse-block, parallel opposed racks and an intervening driving-pinion, the said racks and pinion having the teeth Where they iirst engage of progressively varying lengths substantially as and for the purpose set forth and shown.

3. The combination with a reciprocating traverse-block,operated by opposed racks,and an intervening continuously-rotatingdrivingpinion, of buiers rotatable on axes secured on the traverse-block and a buer rotatable on an axis secured on and revolving with the pinion substantially as and for the purpose set forth and shown.

In Witness whereof I have hereunto set my hand in the presence of two'witnesses.

JAMES HORROCKS.

Witnesses:

JOHN HALL, ALFRED T. WHIrELoW.

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