US3522745A

US3522745A - Gas control turning grip for motors with internal combustion

Info

Publication number: US3522745A
Application number: US738490A
Authority: US
Inventors: Romeo Milosevic
Original assignee: TOMOS MOTOR VEHICLES FACTORY
Current assignee: TOMOS MOTOR VEHICLES FACTORY
Priority date: 1967-06-22
Filing date: 1968-06-20
Publication date: 1970-08-04
Anticipated expiration: 1987-08-04
Also published as: SU396032A3; NL141963B; BE717061A; DE1755786A1; FR1586378A; ES355287A1; NL6808818A; AT288177B

Description

Aug. 4, I970 GAS CONTROL TURNING GRIP FOR MOTORS WITH INTERNAL COMBUSTION Filed June 20, 1968 I 3 Sheets-Sheet 1 I /Ir .III (III llIl/llllllllll g- 4, 1970 R. MILOSEVIC 3,522,745

GAS CONTROL TURNING GRIP FOR MOTORS WITH INTERNAL COMBUSTION Filed June 20, 1968 3 Sheets-Sheet 2 H42 Fig. 2,

I4 24a 64b 54 247; 24 249 942 24 2] 24 242 Fig.4

If 75 55/) 6)? 15 250 ff 2J0 35 fit! Fig.5 7 x United States Patent US. Cl. 74-489 19 Claims ABSTRACT OF THE DISCLOSURE A rotary hand grip for controlling the fuel supply to an internal combustion engine on a motorcycle, outboard motor, motor-scooter, or other apparatus, by controlling the axial movtment of a Bowden cable connected to the carburetor of the engine in response to the turning movement of the hand grip mounted on the end of a handle-bar stem. A sleeve mounted on the end of the stem is constrained for rotary movement with the hand grip and is provided on the interior thereof with a double course threaded groove which accommodates the opposite ends of a slide bar which is constrained to move axially without binding, by rotation of the sleeve, and which simultaneously anchors the terminal end of the Bowden cable at the central portion thereof. The axial movement of the slide bar is limited in one direction by an anchor piece which bridges the handle-bar stem in the direction of the regulating member for the engine, for example, the carburetor, and which simultaneously provides a seat for the sheath or envelope for the end of the Bowden cable. Circular stops at the distal end of the sleeve limit the movement of the slide bar in the opposite direction. The hand grip is designed to contain the components of the mechanism and to fit tightly against the end of the handlebar stem so that the entry of moisture and foreign matter thereto is effectively pre vented.

The object of the present invention is a gas control turning grip for internal combustion engines.

There are already known such turning control grips for the actuation of two Bowden cables, the movements of which are dependent on one another. One of the cables has a movable slider controlled by a screw thread groove which acts on the end of the wire of the first Bowden cable, whereas the end of the wire of the second Bowden cable passes through said slider and is fastened to a suitable fixed part of the rotary grip beyond the field of movement of the slider. The characteristic feature of this rotary grip is that the end of the first Bowden cable wire is tied to the slider and is limited in its movement in an axial direction, while the sheath therefor is firmly fastened in the handle-bar, whereas the envelope of the second Bowden cable Wire leans against the slider.

In the second known embodiment, two independent closely disposed rotary parts of the grip are mounted on the handle-bar. One part, which may be considered the main grip, to support the hand, cooperates with the slider which is guided by means of the internally threaded groove along the elongated slot of the handle-bar stem, the slider being linked with the terminal of the Bowden cable. This part is placed on the external part of the handle-bar stem whereas the second part of the handle is made as an auxiliary short grip. The characteristic feature of this grip is that it consists of an external grip ring and an internal ring rotatably positioned on the handle-bar stem with the two parts interconnected by a screw to execute simultaneous rotations. Both parts, together with 3,522,745 Patented Aug. 4, 1970 "ice an intermediate ring situated on the side, proximal to the main handle, create an annular space. The grasping of the assembly which is situated on the distal side of the auxiliary grip, fixed on the handle-bar stem and opposite to the main grip, effects an engagement with the annular space and the groove disposed in the intermediate ring, while the front surfaces of the intermediate ring and assembly, respectively, which face the main grip, are disposed towards the front surface of the grip ring.

The common characteristic features of all known embodiments of the gas control turning grips with centrally disposed Bowden cables is that they are rigid and are mainly used to control engines on motorcycles and different agricultural machines. In these embodiments a slider moves in an elongated slot of the handle-bar stem, in which slider the Bowden cable is fastened. An internally threaded rotary sleeve, covered with a protecting jacket engages with a sliding cam. For the fastening of the handle-bar stem, special terminals on both sides of the handle are provided. The friction brake arrangement with spring and regulating screw is usually mounted within the inner terminal. The sliding parts of these embodiments are not sufiiciently protected against the entry of moisture and require constant attention and lubrication. Since they are sensitive to corrosion and because of their inelastic and rigid construction which does not damp vibrations, these grips are not suitable for outboard motors.

The object of the present invention is to provide a gas control turning grip comprised of such constituent elements which will result in a rigid and flexible grip assembly, the elements of which are few in number and insensitive to corrosion, and which may be fabricated and assembled by simple technological procedures and therefore not expensive, and requiring but little work on the handle-bar stem to mount the grip thereon when the unit is attached thereto.

The objective of the invention is attained by a gas control turning grip for use on devices equipped with internal combustion motors, such as for motorcycles, scooters, outboard motors and the like, which comprises a centrally disposed and fixed Bowden cable with a rubber or plastic protective jacket, having externally cast integral fins, characterized by a two-part rotary sleeve which moves simultaneously with the jacket, with a slide bar movable along a double course thread groove inside of the longer part of the sleeve. The movable slide bar is connected to the wire of the Bowden cable which is protected against escaping, and is axially guided. The shorter part of the rotary sleeve is frictionally coupled with the jacket and with the handle-bar stem, the latter having an elongated slot for fixing the movement of the sleeve within the jacket in an axial direction, and providing an arrangement for supporting the envelope of the Bowden cable.

A further characteristic feature of the rotary grip consists in this, that the two-part rotary sleeve, formed as a cylindrical body, has in its longer part an internal twocourse thread groove and at its end in the middle part of the sleeve, a circular groove, against which runs a single threaded notch from the shorter part of the sleeve, towards the bottom of the thread groove, the said sleeve having an external integral cast fiange with elongated ribs, and the shorter part thereof having openings for friction inserts.

The characteristic of the slide bar is that it is a prismatic body, having on the lateral surfaces two cogs, and a central bore the passage of the Bowden cable wire, which enlarges in an indentation for the nipple of the wire, and is provided with an elongated incision for inserting the wire.

A further distinctive characteristic resides in the arrangement of the handle-bar stem which is provided with an elongated slot which enlarges at the distal end in which the anchor piece engages, the elongated slot serving for the axial guiding of the sliding bar.

It is the characteristic of the anchor piece that it is a prismatic body, provided with a central bore which axially enlarges into an indented seat for the Bowden cable envelope, and enlarges at the lateral ends into two segment-like teeth.

Finally, the jacket is characterized by an internal annular projection at the passage of the hollow distal part into the proximal part, which contains the described elements, from which projection elongated grooves run to the distal end and enter into an annular groove, beyond which the jacket continues into the annular part, pressed by an ornamental r'ing after the jacket has been placed on the described elements.

The characteristic of another embodiment is that the grip has no ornamental ring, or that the rotary sleeve is made of two parts, and on one external rib at the proximal end of the longer part of the sleeve there is provided a cog, whereas the shorter part is made as a collar substituting for the ornamental ring, which continues over a round groove into a segmental split ring which is provided with an integral cast flange and a rim at the free edge thereof having a nose projecting therefrom for cooperation with the cog of the longer part of the turning sleeve, and the short part of the sleeve is pressed against the handle bar stem with an annular spring.

A third embodiment has a two-part turning sleeve formed by a cylindrical body between a collar and a segmental split ring, constituting the shorter part of the sleeve and corresponding to the length of the proximal part of the grip, so that the distal part of the grip contains the longer part of the turning sleeve in which the slide bar and the anchor stock are placed.

A further characteristic of the arrangement of the handle-bar stem, which is provided with an elongated slot which is enlarged at the distal end into a transverse slot, in which the anchor piece is placed, whereas the elongated slot serves for the axial guiding of the slide bar.

Another possible embodiment is characterized by the turning sleeve without the shorter part, while the longer part is divided into an element provided with the twocourse tread groove and with an axial groove, and into another element, made as a ring the jacket having at the proximal end a collar with axial incisions, embraced by a-cylindrical ornamental ring which presses the said collar against the handle-bar stern, and having, in order to facilitate the mounting, an inserted cover on the distal end. A reinforcing and friction ring is provided inside the jacket at the proximal end, and with a two-part reinforcing and friction ring in its middle part, which is provided with a seat, as well as with a reinforcing and friction ring at the distal end.

The characteristic of one embodiment of the invention is that the anchor piece and the slot for the axial guiding of the slide bar are integrated into the guiding socket which becomes a special body, inserted into the twocourse turning sleeve as guiding socket, having in the distal part an elongated slot for the axial guiding of the sliding bar and in the middle part a two-stepped flanged seat, against the narrower part of which the handle-bar stem is supported. The proximal part of the guiding socket is provided with a tongue having a catch knob thereon, and beneath its point of origin, a key, to snap into and to block the handle-bar stem, which is provided, for this purpose, with an elongated slot for the key and with a closed hollow opening for the knob. The wider stage of the flange rests on the internal cast flange of the turning sleeve, and the said flange is arranged near the base of the two-course thread groove and is divided into two parts by spaced notches in order to make possible the insertion of the movable slide bar.

Several embodiments of the invention are described below in conjunction with the attached drawings, wherein FIG. 1 is a longitudinal section through the grip, having a turning sleeve and a guiding socket,

FIG. 1A is an axonometric view of the component parts of the embodiment shown in FIG. 1, shown as single elements, with the jacket being cut longitudinally,

FIG. 1B is an axonornetric view of the longitudinal section of the turning sleeve from FIG. 1A;

FIG. 2 is a longitudinal section through the turning grip, having an anchor piece instead of the guiding socket, with the handle-bar stem provided with slots for the axial guiding of the slide bar;

FIG. 2A is a cross-section along the line IIAIIA of FIG. 2;

FIG. 3 is a longitudinal section through a third embodiment of the grip;

FIG. 3A is an axonometric view of some of the component parts of the embodiment shown in FIG. 3, excluding the gripping jacket;

FIG. 4 is a longitudinal section of the fourth embodiment showing the rigid jacket containing all the elements of one rigid type of the grip;

FIG. 5 is a longitudinal section of another embodiment of the invention.

In FIGS. 1 to 5 the characteristic elements of the first embodiment have the following reference numbers: handle-bar stem 11, rotary sleeve 21, slide bar 31, twopart guiding socket 41, grip jacket 61, ornamental ring 71, Bowden cable 81, the linking, friction and limiting elements 91.

The essential constructive elements of the second embodiment are: the handle-bar stem 12, turning sleeve 22, slide bar 32, anchor piece 52, grip jacket 62, ornamental ring 72, Bowden cable 82, and the limiting and friction elements 92.

The essential constructive elements of the third embodiment are: handle-bar stem 13, rotary sleeve 23, slide bar 33, anchor piece 53, grip jacket 63, and the limiting and linking elements 93.

The essential elements of the fourth embodiment are: handlebar stem 14, rotary sleeve 24, slide bar 34, anchor stock 54, grip jacket 64, Bowden-cable 84, and connecting elements 94.

The essential elements of the last embodiment are: handle-bar stem 15, rotary sleeve 25, slide bar 35, anchor piece 55, grip jacket 65, and Bowden cable 65.

In FIG. 1, the handle-bar stem, having reference number 11, is provided on the surface with an elongated slot 111 and above it with an opening 12.

The two-part rotary sleeve 21 has a longer distal part 21a and a shorter proximal part 21b. The internal surface of part 21a is provided with a two-course tread groove 213, running up to the two-part integral cast flange 215, which is divided in two parts by oppositely disposed notches 215. The external surface of the rotary sleeve 21 has an external integral cast flange 211 with elongated ribs 212 extending therefrom. Tht part 21b of the sleeve 21 has two openings 214 for receiving the frictional inserts 91b.

The slide bar 31 is a prismatically shaped body, having on both lateral surfaces the cogs or lugs 314, a central bore 312 which in the distal part enlarges into the indentation 313 for the metal nipple 812 of the Bowden cable wire. The proximal part of bar 31 has an elongated incision 315 to facilitate the mounting of the wire 811.

The guide-socket 41 is provided with the distal part 41a and the proximal part 41b which are divided by the stepped integral cast flange 414, which in the interior is designed as an integral strap 412, In the following embodiments this strap is formed by a separate anchor piece to develop the characteristic features of the guide socket elements which pass to the other corresponding elements of the grip, mainly to the handle-bar stern and to the jacket. The proximal part 41b is formed with a tongue 415 fitted with a catch knob 416, and a key 417 is provided beneath the point of origin of the tongue. The key and the knob serve to interengage with the elongated slot 111, and with the closed opening 112 of the handle-bar stern, respectively. The strap 412 of the guide socket is also provided with a central bore 412' and the enlarged indented seat 413.

The jacket of the grip has also two main parts consisting of the hollow distal part 61a and the proximal part 61b, containing the described elementspOn the internal surface of the jacket between the two parts is the annular projection 614 above which begin, in the proximal part, the elongated resting notches 162, which end in the annular seating groove 611. The external surfaces of both parts have integral cast fins 613, to make possible a good hand-grip. The proximal part is constricted beyond the annular dividing incision 615a, to form an annular part 615, which is embraced by an ornamental ring 71 in the finished mounting.

The Bowden cable 81 is anchored in the slide bar 31, and passes through the strap 412 of the guide sleeve and through the proximal part 61b of the grip'jacket 61 and the handle-bar stem 41 up to the carburetor (not shown). The Bowden cable is composed of the known elements, i.e. the wire 81, sheath or envelope 813 and the metal nipple 812.

The embodiment shown in FIG. 2 has a handle-bar stem 12, provided with the elongated slot 123, ending at the proximal part with the transverse slot 124. The rotary sleeve 22 is divided into a longer distal part 22a and the shorter proximal part 22b, and its internal surface is prowided with a two-course thread groove 223 which in the course of passage into the proximal part, enters into an annular groove 226, into which runs a unilateral notch 226, passing beside one of the openings 224, and its beginning being offset in relation to the base of the thread groove. The rotary sleeve is provided on its external surface with elongated ribs 222, which extend from the integral cast circumferential flange 221.

The slide bar 32 is constructed like the one of the first embodiment, and the corresponding parts have therefore the corresponding numbers 322, 323, 324 and 325. The anchor piece 52 engaging within circular groove 226, has a central bore 522, which enlarges in the proximal end into an indentation 523, and has two segment-like teeth 524 on the lateral sides, one of them being covered with the peripheral tooth elongation 534a, to enable the bar to be guided along the notch 226' of the rotary sleeve.

The grip jacket is constructed like the jacket of the first embodiment and the corresponding parts are therefore shown with the

reference numbers

62a, 62b, 621, 622, 623, 624, 625 and 625a. On the annular projection 624 lies a stop disk 92a, which prevents the slide bar to escape from the end part of the threaded groove.

The handle-bar stem of the third embodiment has the same characteristics as the stern of the second embodiment, with the difference that its length is a special characteristic feature of the turning sleeve. The corresponding parts of the handlebar stem have therefor the reference numbers 133 for the elongated slot and 134 for the transverse slot.

The rotary sleeve 23 consists now of two separate parts, i.e. the longer distal part 23a and the shorter proximal part 23b. The internal surface of the distal part of the jacket is provided with a two-course thread groove 233, ending in round groove 236 which is open on one side and which passes into the seat 236". The proximal part 231) is made preferably of Teflon and consists of the collar 238 which substitutes for the ornamental ring, and which distally merges into the segments of the split ring 239, having the cast flange 239', followed by the round groove 239". The nose 239" on the extreme distal rim of the said ring is adapted to be engaged with the cog 232 of one of the elongated ribs 232 of the distal part 23a.

The slide bar is similar to the one of the former embodiments and the corresponding parts, and therefore 6 bear the reference numbers 332, 333, 334, 335. The anchor piece also engages in the circular groove 236 while resting on the seat 236". The prismatic body 531 of the slide bar has a central bore 532 which enlarges into the indentation 533.

The distal part of the grip jacket is the same as the first embodiment and the corresponding elements have the following reference numbers, i.e. the external integral cast fins 633, and the annular projection 634 between the two parts. The proximal part 636 of the jacket has a reinforcing friction ring 637 with the seat 637 adapted to be pressed into and to rest on the segmented split ring 239 and on the integral cast flange 239, respective ly, of the rotary sleeve. The auxiliary annular ring 930 forces the segmented split ring 239 of the rotary sleeve against the handle-bar stem. The elongate ribs 232 of the rotary sleeve engage within the elongated seating notches 632, but there is no circular seating notch as was the case with the first embodiment.

The handle-bar stem 14 of the fourth embodiment fits within the whole length of the grip jacket together with the rotary sleeve 24. The handle-bar is provided with an elongated slot 143 ending in the transverse slot 144, as indicated in FIG. 3A.

The two-part rotary sleeve 24 has a longer proximal part 24'b, formed as a cylindrical body 247 at the central portion thereof and ending at the proximal part with the collar 248 and at the distal part with ring 249. The latter passes through a circular groove to the integral cast flange 249 and the round groove 249", and is provided on the extreme rim of the ring with the nose 249', as indicated in FIG. 3A.

The distal part 24a of the rotary sleeve has the same elements as the preceding embodiment, i.e. 242, 242', 243, 246 and 246", as indicated in FIG. 3A.

The slide bar 34 has the same characteristic features as the former embodiments and its parts have therefore the reference numbers 342, 343, 344 and 345. The anchor piece 54 is the same as that in the preceding embodiment and the parts have therefore the reference numbers 541, 542, 543 and 544, as indicated in FIG. 3A.

The handle jacket consists of the proximal part 646, which is stiff in this embodiment, because it contains the handle-bar stem 14 and the cylindrical body 247 of the proximal part of the rotary sleeve. The distal part 64a of the handle jacket is also rigid because it contains the distal part 24a of the rotary sleeve. The suitable construction of these elements makes possible the omission of the annular projection between the distal and the proximal parts of the gripping jacket, but this is made up effectively by the reinforcing friction ring 646 at the end, and another friction ring 647 in the region of the segmented split ring, and a third one 648 at the other extreme end of the distal part of the jacket. The reinforcing friction ring 647 has a seat 647 which makes possible a good support for the integral cast flange 249 of the segmented split ring 249.

Since the motion of the slide bar in the direction of the distal part is limited by the bottom of the jacket, no other limiting elements are needed. Neither is there needed any friction insertions, for this need is satisfied by the segmented split ring 249 which is pressed on the handle-bar stem 14 by the auxiliary annular spring 940.

The handle-bar stem 15 of the fifth embodiment fills the entire length of the jacket and it is provided with an elongated slot 153 ending in the transverse slot 154, as indicated in FIG. 3A. The rotary sleeve in this embodiment is divided and has a proximal part 25b, in the form of a ring, and a longer distal part 25a. The distal part has external elongated ribs 252 and an internal one-side open circular groove 256' with a seat 256" and a two-course thread groove 253 for the movement of the slide bar, as indicated in FIG. 3A.

The anchor piece 55 rests on the seat 256" of the rotary sleeve and presses laterally on the one-sided open circular groove 256.

The slide bar 35 has the same elements as in the other embodiments, its features are therefore shown by the reference numbers 352, 353, 354, 355. Also, the anchor piece 55 is the same as that of the second and fourth embodiments and its elements are shown by the reference numbers 551, 552, 553, 554, 555, as indicated in FIG. 3A.

The grip jacket has a proximal part 65b and the distal part 65a, closed by a cover 659 which is necessary for the mounting of the anchor piece and the rotary sleeve within the jacket. Besides the elements described above, the jacket is provided with a reinforcing friction ring 658 adjacent to the cover, a reinforcing friction ring 657 with a seat 657' at the sleeve portion 25b of the rotary sleeve, so that the seat rests on the proximal part of element 25b, as well as a reinforcing friction ring 656 in the region of the annular collar 655 which is provided with incisions. The latter is sufficiently flexible to embrace the handle-bar stem 15, when the ornamental spring ring 75 is placed thereon.

The gas control turning grip according to the invention works this way:

To increase the gas supply in the motor, the grip is turned in a counterclockwise direction, thereby causing

slide bar

31, 32, 33, 34, 35, to slide through the

twocourse thread groove

213, 223, 233, 243, 253 of the turning

sleeve

21, 22, 23, 24, 25. Its motion towards the proximal part of the grip is limited by the anchor piece, and the motion towards the distal part by the limiting disk 91a, 92a, 93a, or by the bottom of the distal part, which in one of the embodiments is constituted by a cover. The axial guiding of the slide bar is effected by the elongated slots 123, 133, 143, 153 of the handle-

bar stem

12, 13, 14, 15, or by the elongated slot 148 of the guiding socket 41.

The transmission of the turning of the grip to the turning sleeve is effected by the elongated ribs 212, 222, 232, 242, 252 and by the external integral cast flange 211, 221 and by the proximal parts 23b, 24b and 25b of the turning sleeve, respectively. The friction insertion 91b, 92b and the auxiliary annular spring 930, 94c and 75' keep the grip in the selected position, but they may be omitted if the maintenance of this position is not necessary.

The advantages of the grip according to the invention are considerable. All component parts are covered with a jacket, which acts as a gripping surface. Apart from its connecting all the component parts, the jacket damps the vibrations, and for this purpose especially, the flexible embodiments in FIGS. 1, 2 and 3 are suitable. Such a grip is convenient especially for outboard motors, in which instance the vibrations are very objectionable to the operator. The rigid arrangement of the distal part of the grip, which contains the elements for the guiding of the Bowden cable is convenient for motorcycles, scooters and other vehicles or engines.

All component parts are adapted to be extruded from plastics which makes possible economical production while attaining resistance against corrosion and wearing out.

The grip with the jacket containing the component parts, is mounted as an integral unit and needs no special servicing after its mounting, in commercial use. The grip may be easily mounted, simply by attaching it to the handle-bar stem. Since the axial extension of the elements of the Bowden cable is short, the grip can be adapted for different purposes and in different installations.

If some parts have to be replaced by spare parts, the jacket may be removed with help of simple tools and procedures.

A very important advantage of the construction is that no damage can occur if the turning of the grip is forced in the direction of full gas. Owing to the flexibility of the jacket and of the Bowden-cable, the slide bar can push forward the limiting disk 91a, 92a, 93a and the said bar slips out of the thread groove of the turning sleeve. The

grip turns easily, and in this way the internal parts are protected against damage. At the turning of the grip in the opposite direction, the limiting disk 91a, 92a, 93a drives the slide bar back into the thread groove and the grip continues to function normally.

I claim:

1. A rotary fuel control grip for internal combustion engines on vehicles and the like, having a regulating mem ber therefor, comprising (a) a tubular handle-bar,

(b) a rotary gripping jacket of plastic material mounted on the end of said handle-bar,

(c) a cylindrical sleeve mounted in the interior of said jacket for rotary movement therewith,

(d) said sleeve having a two-course spiral groove formed on the interior thereof,

(e) a slide bar extending transversely to the longitudinal axis of said sleeve and provided with a lug at each end thereof for engaging the spiral groove of each course,

(f) a Bowden cable having the free end thereof retained by said slide bar at substantially the central portion thereof and with the cable extending from said free end adapted to pass through the interior of said handle-bar,

(g) a sheath for said Bowden cable, and

(h) means mounted on the interior of said handle-bar proximate to said regulating member for providing a seat for the end of said sheath in surrounding relation to said Bowden cable.

2. A device as set forth in claim 1, wherein said sleeve is formed integrally of two parts having a distal portion longer than the proximal portion.

3. A device as set forth in claim 2, wherein the twocourse spiral threads are formed in the longer distal portion.

4. A device as set forth in claim 3, wherein the shorter proximal portion of the sleeve is provided with openings, and frictional inserts therein acting against the external surface of the handle-bar to yieldingly retain said sleeve in its set position.

5. A device as set forth in claim 1, wherein said sleeve is formed of two Separate coupled portions with the distal portion of greater length than the proximal portion.

6. A device as set forth inclaim 5, wherein the twocourse spiral groove is provided in the distal portion, and the proximal portion is provided with radial incisions at the end thereof adjacent to said distal portion to form a split ring, an annular spring ring in engagement with said last-mentioned end to force said end into tight engagement with the external periphery of said handle-bar, and coupling means at the juxtaposed ends of said sleeve portions to enforce the conjoint movement thereof.

7. A device as set forth in claim 6, wherein said lastmentioned coupling means comprises a lug extending beyond the juxtaposed end of said distal portion adapted to engage within a socket provided at the end of the proximal portion.

8. A device as set forth in claim 7, wherein the proximal portion of the cylindrical sleeve is provided with a collar at the proximal end of said proximal portion and an annular groove between said collar and split ring, with an internal collar at the proximal end of said gripping jacket for engaging said annular groove on said proximal portion of said sleeve.

9. A device as set forth in claim 1, wherein said sleeve is formed of two separate coupled parts with the distal portion of lesser length than the proximal portion.

10. A device as set forth in claim 1, wherein said slide bar is of prismatic contour having a bore at the central portion thereof with an enlargement at the distal portion thereof for receiving the enlarged free end of said Bowden cable to maintain the latter secured therein, and an incision extending from one end of said slide bar to said bore to permit the mounting of the end of the cable therein.

11. A device as set forth in claim 1, wherein said lastnientioned means comprises an anchor piece in the form of a guide socket fixedly mounted within the handle-bar adjacent to the end of the latter.

12. A device as set forth in claim 11, wherein said guide socket is provided with two spaced portions separated by a stepped flange at an intermediate point of the external surface thereof for support within the central portion of said cylindrical sleeve, a resilient tongue provided with a catch knob adjacent the free end thereof and a lug therebeyond in one portion of said guide socket for interlocking engagement with the end of said handle-bar, said other portion of said guide socket provided with longitudinal slots for constraining the movement of said slide bar in an axial direction.

13. A device as set forth in claim 1, wherein said lastmentioned means comprises an anchor piece having enlarged ends adapted to be seated within diametrally opposed transverse peripheral slots adjacent to the end of said handle-bar, and said handle-bar having longitudinal slots extending from said transverse slots in an axial direction to constrain the movement of said slide bar in an axial direction.

14. A device as set forth in claim 1, wherein said rotary gripping jacket is formed of two portions with an annular flange on the interior thereof at the junction line between the proximal and distal portions thereof, said cylindrical sleeve being mounted in the proximal portion of said jacket, and a confining disk at the base of said sleeve and supported by said annular flange.

15. A device as set forth in claim 14, wherein said gripping jacket is provided with a plurality of longitudinal grooves distributed around the internal periphery thereof for receiving correspondingly distibuted ribs on the external surface of said cylindrical sleeve, an annular groove on the outer periphery of said gripping jacket adjacent to the proximal end thereof, and an ornamental ring surrounding said last-mentioned annular groove to maintain a tight engagement of said jacket with said end of said handle-bar.

16. A device as set forth in claim 1, wherein said sleeve is formed of a plurality of coupled portions, with the two course spiral groove provided in the most distal portion, with an intermediate portion having radial incisions therein at the end thereof adjacent to said last-mentioned portion to form a split ring, an annular spring ring in engagement with the external surface of said intermediate portion to force said last-mentioned portion into tight engagement with the external periphery of said handlebar, coupling means at the juxtaposed ends of said sleeve portions to enforce the conjoint movement thereof, an auxiliary sleeve mounted on said tubular handle-bar at the proximal end of said intermediate portion and provided with an annular peripheral collar at the outer end thereof, said gripping jacket adapted to surround said coupled sleeve portion and said auxiliary sleeve.

17. A device as set forth in claim 16, wherein said gripping jacket is provided with a plurality of annular reinforcing projections on the interior thereof adapted to engage the peripheral external surface of said most distal sleeve portion adjacent to the outermost end thereof, the adjoining peripheral portions of said intermediate sleeve portion and auxiliary sleeve, and said auxiliary sleeve adjacent to said peripheral collar.

18. A device as set forth in claim 1, wherein said sleeve with the two-course spiral groove therein is positioned within the most distal portion of said gripping jacket, a circular end closure thereat for said jacket, internal reinforcing frictional rings at each end of said jacket surrounding the distal part of said sleeve and the proximate part of said handle-bar, an additional stepped reinforcing ring at an intermediate portion of the interior of said jacket for embracing and confining the proximate part of said sleeve, and an ornamental spring ring surrounding said handle-bar at the proximate end of said jacket.

19. A device as set forth in claim 1, wherein said gripping jacket is provided with a circumferential groove on the interior thereof proximate to the mounting thereof on said handle-bar with at least one groove extending longitudinally therefrom, and a peripheral flange on the exterior surface of said sleeve at the shorter proximal part thereof with at least one rib extending longitudinally therefrom for interengagement with said one groove in the jacket to constrain said sleeve against movement in an axial direction.

References Cited UNITED STATES PATENTS 591,994 10/1897 Warren et al. 74489X 1,019,304 3/ 1912 Chubbuck 74489 1,231,055 6/1917 Packard 74489 2,788,676 4/1957 Spexarth 74489 FOREIGN PATENTS 516,475 1/1953 Belgium.

JAMES A. WONG, Primary Examiner