US1234868A

US1234868A - Change-speed gear.

Info

Publication number: US1234868A
Application number: US11382016A
Authority: US
Inventors: Frederick Oatley Bynoe
Original assignee: Individual
Current assignee: Individual
Priority date: 1916-08-08
Filing date: 1916-08-08
Publication date: 1917-07-31
Anticipated expiration: 1934-07-31

Description

F. O. BYNOEi CHANGE SPEED GEAR} APPLICATION FILED AUG-B. 1916- Patented J 1113731, 1917..

5 SHEETSSHEET I F. 0. BYNOE.

CHANGE SPEED GEAR. APPLICATION man VAUG-B, ISHG.

Patented July 31, 1917.

5 SHEETSSHEET 2 1 a m n Y7 mv v U7 5 F FJO. BYNOE.

CHANGE SPEED GEAR.

APPLICATION FILED Aue.a. 1916.

Patented July 31, 1917.

5 SHEETS-SHEET 3.

' F. 0 BYNOE.

CHANGE SPEED GEAR.

APPLICATION FI LED AUG.8, 1916.

Patented July '31, 1917.

5 SHEETS-SHEET 4.

F. 0. BYNOE.

CHANGE SPEED GEAR.

APPLICATION FILED'AUG.8. 2916.

.1 234,868. Pafented uly 31, 1917. i

k V/ F I I a WM FREDERICK OATLEY BYNOE, OF ACTON, ENGLAND.

CHANGE-SPEED GEAR.

Specification of Letters fatent.

Patented July 31, 1917.

Application filed August 8, 1916. Serial N 0. 113,820.

To all whom it may concern:

Be it known that I, FREDERICK OATLEY BYNOE, a subject of the King of Great Britain and Ireland, and resident of Acton, county of Middlesex, England, have invented a certain new and useful Improvement in Change-Speed Gear, of which the following is a specification.

This invention relates to improvements in frictional change speed gear.

The invention is illustrated by the accompanying sheets of drawings, in which Figure 1 is an elevation and Fig. 2 a sectional view on line 1, 1 of the outside case containing the mechanism hereinafter referred to.

Fig. 3 is a longitudinal section, gear being shown at low speed.

Fig. 4 is a view of a cylindrical frame detached and showing the cones carried thereby.

Fig. 5 is a transverse section on

line

2, 2 of Fig. 3.

Fig. 6 is a transverse section on

line

3, 3 of Fig. 3.

Figs. 7, 8 and 9 are views showing how the roller hereinafter referred to may be provided or fitted with a spring contact ring, Fig. 7 being a side view of the spring contact ring, Fig. 8 an end View of the roller showing rin in position, and Fig. 9 is a detail elevation thereof.

Figs. 10 and 11 are views showing the roller provided with corrugated contact rings.

Fig. 12 is a view similar to Fig. 3, but

showing the pressure removed from the cone-carrying frame and roller free to be shifted.

Fig. 13 is a view similar to Fig. 12, but showing roller shifted for high speed and pressure on cone-carrying frame restored.

Fig. 14: shows the construction of the double cones.

Fig. 15 shows a modified construction of said double cones.

Fig. 16 is a part longitudinal sectional view showing a modification of the arrangement shown in Figs. 3 to 13.

Fig. 17 is a view showing the conical frame employed in such modified arrangement, and cones carriedby said frame.

18 is a sect onal. view o line 4:, 4

. are- Fig. 19 is a sectional view on line'5, 5 of Fig. 7

Figs. 20 and 21 are diagrammatic views hereinafter referred to.

Like letters of reference indicate corresponding parts in the several figures.

speed gear consists essentially of a series of double cones designated by a as a whole, and

hereinafter more particularly described,

loosely mounted in longitudinal slots 6 spaced at equal distances apart around the circumference of a frame 0 centrally and rotatably mounted within an outer stationary case 63 provided with a conical bore which forms a cone race 6, said frame c as shown in Figs. 3, 4L, 5, 6, 12 and 13 being of cylindrical formation, so that when said frame is rotated by its shaft f the cones run around the conical race 6, provision, as hereinafter described, being made, in the frame 0 for a radial adjustment of the distance between said cones and the central axis around which they revolve.

Mounted on the shaft 9, which in the present case is the driven shaft, and fitting centrally within the cylindrical cone-carrying frame 0, is the roller 72, which contacts with the cones a; in such a manner that the cones a which surround it press against its circumference as they roll around the conical race 6 and cause it to revolve. This roller h mayasshown in Figs. 3, 12, 13

' In carrying out the invention, the change and 16be plain, or said roller h-as shown in Figs. 7, 8 and 9may be recessed at h for the reception of a ring it? having an internal diameter slightly in excess of the recessed portion k, and an external diameter slightly in excess of the external diameter of the roller to allow of its constant deformation during rotation when in contact with the cones a, projections h on said ring fitting in notches h in the roller preventing said. ring rotating on said roller.

cones, and for this purpose the shaft 9 is arranged to have a sliding as well as a rotary motion.

A spring acting on the cylindrical conecarrying frame is arranged in such a manner that it pushes the cones into the conical bore or race of the outer case, so that said cones act as revolving wedges between said conical race and the roller, the amount of pressure, being dependent on the strength of the spring, being varied as required.

Such an arrangement may consist-as shown in Figs. 3, 12 and 13of a coil spring j surrounding the driving shaft f of the frame 0, said spring 7' taking between a collar j butting against the rear end 0 of the frame 0 and a screwed collar y' said collar j being screwed more or less into the outer case d.

A suitable arrangement of removing or relieving the pressure of the spring is provided to facilitate the skidding of the roller 72, to any position along the cones and which at the same time acts as a clutch release as it sets the roller free.

Such an arrangement consistsas shown in Figs. 1, 2, 3, 12 and 13-of a compound lever, one arm is of which is pivoted at 76 to the outer case d and connected by links is, pivoted at 76 to a collar 7% loosely but nonslidably mounted on the shaft 9 and pivoted at k to said arm is, and, on being operated by a downward movement, slides the shaft 9 and with it the roller h to any position between the smaller and larger ends of the cones. The other arm k of the compound lever is pivoted in its length at is to the arm 70 and bears by its inner end 7:" on the front end 0 of the cone-carrying frame 0 so that as said arm k is actuated, (upward movement) it presses back said cone-carrying frame 0 against the action of the spring 7, thus releasing the pressure of said spring upon the cones, setting the roller free. This operation facilitates the sliding of the roller to a new position and acts as a clutch release.

The arms 70, 7& of the compound lever act in unison, that is to say, if it be required to shift the roller h from the position shown in Fig. 3 to the position shown in Fig. 13,

then the outer ends of said arms 70, 7c are brought together as in Fig. 12 and then depressed together; or if the shaft j be required to run free, then by locking the arm h when it has pressed back the cone-carry ing frame 0, no motion is transmitted from said cone-carrying frame 6 to the centrally disposed rotatable shaft g, as there is no frictional contact between the cones a and the roller 7a and the cone race 6.

For the proper working of the invention it is necessary that the ratio between the diameters of the conical race e and the diameters of the cones at every section of contact between them shall be the same.

sary that double cones constructed in the 7 following manner and illustrated more especially in Figs. 14: and 15 must be used.

Each double cone consists of three sections, viz :a cone (4 between the two end sections a a of another cone, the sides of the middle cone converging at a more obtuse angle than, and to a point in the longitudinal axis of the cone of which the end sections a", a only are retained.

By this construction the sides of the mid dle cone a, or middle cone, maybe made parallel with the axis of the conical race 6- see Figs. 3, 12 and 13and exert a pressure upon the whole length of the roller, while the two end sections a, a which form parts of the other cone are in contact with the conical race esee Figs. 3 and 13. Thus, while the same ratio between the diameters of the two end sections a a of the cones and the diameter of the conical race a at their point of contact is maintained, the parallelism be tween the sides of the middle parts a of the cones which face the axis of the conical race 0 insures good contact with the roller h, and it also provides a parallel path which facilitates the sliding of the roller as it is moved along to a new position between the cones when changing speed.

When the cone-carrying frame 0 is rotated, the cones a as a whole revolve around the conical race :2 and the roller h is revolved with varying speeds according to the variations in the diameter of the sections of the middle cones 0: which are acting upon said roller, the limit of the variations of speed 7 which can be obtained being dependent on the difference in diameter between the larger and smaller ends of the cones a.

In the modified form of arrangement of change speed gear shown in Figs. 16, 17, 18 and 19, a conical cone-carrying frame 0 is employed and such frame 0 is at its front and rear ends 0*, c slot-ted for the reception of slides c in which are housed the pins a of the double cones a, such slides 0 allowing for the rise and fall of the cone, and for the more perfect working of the cone-carrying frame 0 there is interposed between the end 0 of the frame and the loose collar on the shaft 7 a ball-bearing ring 7' the pressure of the spring 7' on said ball-bearing ring 7' and the frame a being regulated by means of the screwed collar or cap 7' As shown diagrammatically in Fig. 20, a second central roller h may be employed to actuate the cones, the shafts of the rollers being connected up in any suitable manner so that .the rollers h, k" may be moved toward or away from one another; oras shown in Fig. 2l-gear wheels a may be attached to the ends a of the cones a and meshed to a central driving gear a.

The roller spindle may be fixed, then either the outer casing containing the cone race or the cone carrier may be the driver, the other being driven. In like manner, the cone carrier may be made stationary, then either roller or outer casing may be driver or driven. If the outer casing is made stationary as illustrated and described herein, either the carrier or roller may be driver or driven. In the case of two central rollers being used, either may be driver and the other driven. I

Having now described my invention, what I claim as new and desire to secure by Letters Patent of the United States is 1. A frictional change speed gear including in combination a driving element and a driven element a casing having a cone race, double cones operated by the driving element and consisting of three sections, namely, a

cone between two end sections of another cone, the sides of the middle cone converging at a more obtuse angle than the sides of the end cones, and the sides of said end cones being disposed at an angle to the axis of the cone race of the casing, while the sides of the middle cones are parallel with said axis.

2. A frictional change speed gear includ: ing in combination a driving element and a driven element a casing forming a bearing for the driving element and having a cone race, double cones operated by the driving element and consisting of three sections, namely, a cone between two end sections of another cone, the sides of the middle cone converging at a more obtuse angle than the sides of the end cones, and the sides of said end cones being disposed at an angle to the axis of the cone race of the casing, while the sides of the middle cones are parallel with said axis, and an axially shiftable roller carried by the driven element and engaging with the middle parallel portions of said double cones housed within the casing.

3. A frictional change speed gear including in combination a driving element and a driven element a casing having a cone race, double cones operated by the driving element consisting of three sections, namely, a cone between two end sections of another cone, the sides of the middle cone converging at a more obtuse angle than the sides of the end cones, and the sides of said end cones being disposed at an angle to the axis of the cone race of the casing, while the sides of the middle cones are parallel with said axis, and maintain the same ratio between the diameters of the two end sections of the double cones and the diameter of the cone race at their points of contact, and an axially shiftable roller carried by the driven ele ment for engaging with the parallel sides .ofthe middle sections of the double cone.

4. A friction change speed gear including in combination a driving element and a driven element, a casing having a conical pressure of the spring.

7 5. A frictional change speed gear, including in combination a driving'element and a driven element a casing having a conical bore forming a cone race, a cone carrying frame having longitudinal slots, double cones loosely mounted in said slots of the frame, said double cones having-their end sectionsengaging the conical race, a roller carried by the driven element and centrally mounted between and shiftable along said double cones, a spring bearing on said conecarrying frame to push the same into the conical bore so that the cones act as revolving wedges between the conical race and the roller, means for regulating the pressure of the spring, and means for relieving the pres.

sure of said spring to facilitate the sliding of the roller and act as a clutch release.

6. A frictional change speed gear, including a driving shaft a casing forming a bearing for said driving shaft having a conical bore forming a cone race, a cone carrying frame having longitudinal slots, double cones loosely mounted in said slots, said double cones having their end sections engaging the conical race, a driven shaft, a loose collar on said shaft, a roller also on said shaft and mounted between and shiftable along the middle section of said double cones, a spring bearing on said cone-carrying frame to push the same into the conical bore so that the cones act as revolving wedges between the conical race and the roller, means for regulating the pressure of the spring, means for relieving the pressure of said spring to facilitate the sliding of the roller and act as a clutch release, a compound lever one arm of which is pivoted to the outer case and linked up to said loose collar on the roller shaft, while the other arm of the compound lever is pivoted in its length to the other arm of the compound arms acting in unison. V

7.- A frictional cha g peed gear, including a casing having a conical bore forming a cone race, a cone carrying frame having longitudinal slots, double cones loosely mounted in said longitudinal slots, gears attached to .either end of said double cones and meshing with a central driving gear, said double cones having their end sections engaging the conical race, a roller centrally mounted between and shiftable along said cones, a spring bearing on said cone-carrying frame to push the same into the conical bore so that the cones act as revolving wedges between the conical race and the roller, and means for regulating the pressure of the spring.

8. A frictional change speed gear, including a driving and driven shaft a casing forming a bearing for said driving shaft and having a cone race, double cones consisting of three sections, viz.a cone'between two end sections of another cone, the sides of the middle cone converging at a more ohtuse angle than the end sections, said cones being mounted within said cone race Where- Copies of this patent may be obtained for race at an angle to the axis thereof, an

the end parts revolve in contact with the axially shiftable roller carried by the driven shaft and engaging the middle cones of the compound cones for transmitting power,

ment of a plurality of compound cones operated by said driving element, said cones being mounted about a horizontal axis, and each having their own axis converging toward said horizontal axis, each of said cones comprising bearing end portions, and an intermediate working portion, the faces of said intermediate working portions being parallel. V

In testimony whereof I have aflixed my signature in presence of two witnesses.

FREDERICK OATLEY BYNOE. Witnessesz,

ROBERT HUNTER, BENJM. Tnos. KING.

five cents each, by addressing the Gommissioner of Patents,

Washington, I), C.