US1235794A - Change-speed gearing. - Google Patents

Description

J. T. HARDAKER. CHANGE SPEED BEARING.

APPLICATION FILED OCT- 4, 1915.

Patented Aug. 7, 1917.

2 SHEETS-SHEET 1.

5 w m 0. i f f w MaaMV J. T. HARDAKER.

CHANGE SPEED GEARING.

APPLICATION FILED on. 4. 1915.

I'TE'Z Ratented Aug. 7, 1917.

2 SHEETS-SHEET 2.

JOHN THOMAS HARDAKER, OF BRADFORD, ENGLAND.

CHANGE-SPEED GEARING.

Specification of Letters Patent.

Patented Au. *7, 1917.

Application filed October 4, 1915. Serial No. 53,876.

To all whom it may concern: I

Be it known that I, JOHN THOMAS HARP- AKnn, a subject of the King of Great Britain, and resident of Bowling Iron Works,

Bradford, in the county of York, England, have invented a certain new and useful Improvement in Change-Speed Gearing, of which the following description, having reference to the accompanying sheets of drawings, is a specification.

This invention relates to the classor type of change speed driving gear wherein two' pairs of coned driving disks are made use of, one pair being mounted upon the driving shaft while the other pair is mounted upon the driven shaft, the driving belt extending from one pair to the other. In this type of driving gear the advancing of one pair of cones toward each other to. in.-

crease their efi'ective diameter while the other pair of cones are simultaneously receding from each other to decrease their effective diameter, and. vice versa, is the method followed of varying the speed of the driven shaft relatively with the driving shaft. It is known that the distances through which each advancing and receding movement respectively of said cones is car-- 'ried out are not equal, that is to say,the -advancing movement of one pair of cones the other arm'of the lever relatively with the paths through which the advancing and receding disks are made to move. However, the

employment of these lever devices does not attain the object desired with that precision that is necessary because of the fixed relative ratiosthat exist between the movement of -a lever and the paths in which the disks follow, neither can such levers be altered or varied as circumstances may require. To overcome this difficulty and produce means whereby the disks which recede'froni each other may be moved through spaces which vary from the spaces through which the disks which-are advancing toward each other, move, and that any alterations necessary to attain this with the greatest aci ments of the disks 2-2 necessitate.

curacy may be easily and readily effected, is the object of my invention.

In the accompanyingsheets of drawings which are illustrative of my invention Figure 1 is an elevation illustrating the formation and arrangement of devices that I make use of.

Fig. 2 is a sectional elevation taken on line AB of the "parts shown by Fig. 1 and as seen in the direction indicated by" the arrow a.

To attain the object of my invention I make useof the usual 'form or shape of cone drivingdisks 2, 2, 2", 2 and. arrange same to slide on their driving and driven shafts 3, 3 as heretofore. l'lowever. instead of relying on lever actions for transmitting motion'to these disks 2'2 1 introduce four pairs of incline or cam surfaces 4, 4", 4 and 4". The type of sliding inclines '-l:i as will be observed. may be shaped or cut to the exact requirements that any variations in the sliding moveln the arrangement of the inclines or sliding cam surfaces illustrated, I make use of sleeves 6, G 6*, 6, that-will slide upon the shafts 3 and 3 respectively, but which are held against rotation by the sliding bars 7 and '7 engaging flattened parts of said sleeves,

thus said sleeves while being permitted to slide through the central openings of the bars 7 .and 7 are by being spanned by. said bars securely held against rotation as desired. Upon these bars 7 'and 7* I mount my series of. inclines l-l and these bars 7 and 7 are arranged to slide over the two pairs of sleeves as they are actuated by the screws 8 andS. The screw 8 has mounted upon it a sprocket wheel 9, while the sprocket wheel '9 is fixed upon the screw 8, so that by coupling the two wheels 9 and 9 together by' a chain'10, when the hand wheel 11 is rotated (since it is fixed" against which the bars 7 and 7 may press a and their several bear- 7 were.

as they are being moved or slid over the sleeves 66.

As the inclines4 4: are thus moved by their respective bars '7 and 7*, they are caused to press upon rollers 65 carried by their respective sleeves 6 and 6 hence said inclines H as they advance and force the rollers d toward each other their respective sleeves 6 6 will also be forced to approach each other, and will thus force the pairs of ;disks,22 or 2", 2 toward each other as will be understood' since the sleeves 6 and 6 abut against the hubs of the disk 2 and 2*, While the sleeves 6 and 6 abut or press against the sleeves of the disks 2; and 2;

The arrangement of the inclines 4- is such that when their respective bars 7 and 7 are 'moved in the direction indicated by \the arrow 7, the disks 2 and 2 will be made to approach each other, at which time the disks 2" and 2 will recede from each other the re-- verse motion of the bars? and 7* having the .eflect'of reversing the actions of said disks 2, 2?, and 2 2. In order to relieve the disks of excessive friction I mount between the sleeves 6-6 and their respective disks 22 at theparts g antifriction ball thrust bearmgs. 7

Such being the nature and object of my invention, what I claim is g 1. In change speed mechanism, a driving shaft andja driven shaft having belt connection, complemental belt-engaging cone disks on each of said shafts, said cone disks on each of said shafts being movable laterally toward" and from each other, and means. operable to cause, simultaneously, the cone disks of one of said shafts to approach each 4 other and permit the cone disks on the other of said shafts to recede unimpeded at a predetermined rate from each other, said means including a plurality of cam-carrying members arranged to be moved simultaneously transversely of the shafts, cams arranged on said cam-carrying members, anti-friction devices arranged between said cams and said cone disks, each of said anti-friction devices being provided with a cam-engaging and a cone-disk-engaging part, and mechanism for moving said cam-carrying members in unison.

2. In change speed-mechanism, a driving shaft and a driven shaft having belt connection, complemental belt-engaging cone disks on each of said shafts, said cone disks carrying members, sleeves arranged on each of said shafts between said cams and said cone disks, each of said sleeves being provided with spaced-apart cameengaging parts whereby a plurality of saidcams may act upon the sleeve in unison, and each of said sleeves being provided with a cone-disk-engaging part, and manually operative mechanism for moving said yoked cam-carrying members in umson.

JOHN THOMAS HARDAKER. Witnesses a SAMUEL HEY, .AUGUSTUS E. INGRAM.

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