USRE12583E - Clutch-pulley - Google Patents

Description

REISSUED DEC. 18, 1906.

W. J. 'HILLIA-RD. CLUTCH PULLEY. APPLICATION FILED MAY 28, 1906.

' INVENTOR 2 SHEETS-SHEET 1.

WITNESSES:

ATTORNEY REISSUED DEC. 18, 1906 W. J, HILLIARD. CLUTCH PULLEY. APPLICATION FILED MAY 28, 1906.

2 snnrs-sngm 2 ATTORNEY To 0.7 whom/it may concern:

. a citizen of the United on the rotation of the latter,

' defined by the annexed claims.

' the purpose of rotating UNI-TED STAEATENT OFFICE.

WILLIAMJ. HVILI'JIAR'D, OF ELMIRA, NEW YORK, ASSIGNOR TO THE 1, HILLI ARD CLUTCH &

Yon

Original No. 753,073. dated Specification of Beis Be it known thatI, WILLIAM J. HILLIARD, States, and a resident of Elmira, in the county of Chemung and State of New York, have invented new and useful Improvements in Clutch-Pulleys, of which the following is a full, clear, and ex-I act description.

My invention relates to improvements in clutch-pulleys adapted for use on shafts and machinery; and one object that l have in view is the provision of vice which embodies in a single structure the a simple and compact departs necessary to drive orto be driven by a belt and to make the belt member fast or loose with a shaft.

A further object is to provide the pulley with means by which the loose member may be made fast automatically with the shaft thus making provision for taking up the load gradually and by theprogressive action of the clutch, such form of the pulley being especially use: ful in connection with gas-engines and other forms of machines.

Further objects and advantages of the invention will appear in the course of the subjoined description, and the novelty will be Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure 1 is a side elevation of .a clutchpulley constructed in accordance with my invention and showing the same equipped with means for automatically making the loosemember fast withthe shaft member. Fig. 2 is a vertical cross-section on the line 2 2 of Fig. 1. Fig. 3 is a vertical sectional elevation taken centrally through the construction shown by Fig. 4, and Fig. 4 is a horizontal section on the line 4 4 of Fig. 1.

A designates the fast or revoluble member, and B is the loose or idle member.

-' The fast member A is provided with an elongated hub or sleeve 5, adapted to .be fastened in any suitable way to a shaft for therewith. This fast member has aweb 6 extending outwardly from the hub and joined with a rim portion 7. The rim 7 is provided with an annular groove ohehannel 8; which accommodates a ser es .the rollers 9 of the ranged, in Fig. 1.

MACHINERY COMPANY, OF ELM1RA,- NEW CLUTCH-PULLEY.

sued Letters Patent; Reissued Dec. 18, 1906..

February 23, 1904. Application for reissue filedMay 28, 1906. Serial No. 319.212.

- of bearing-rollers 9, the latter having stub-axles 10, which are mounte in any suit able way in said rim of the fast member A. As shown by Fig. 1, I employ a series of four suit able rollers 9, which are spaced equidistant around the periphery of the member and lie partly within. the annular channel 8 thereof, the rollers projecting beyond the periphery of said member A that the number of rollers employed in the series may be increased, although in Figs. 1 and 2 I have only shown the series of four rollers, the latter being sufficient to properly support the pulley member B when it runs idly on the member A.

The loose pulley member B is. shown by Fig. 2 as consisting of complemental sections 11 12, which are assembled in matching relation and are secured firmly together by a plurality of through-bolts 13, the sectional construction of said pulley-member facilitating its application to the rim and the rollers of the fast member A. The parts comprising inner edges and in their opposing faces with matching recesses adapted to form an annular track or way 14, in which is received the projecting portions of the rollers 9, constituting the series on .the fast pulley member- A. The inner edge of the sectional loose pulley'member B is disposed quite close to the periphery of the rim 7, forming the part of the member A, and this member B is sustained loosely in place around the member A by the series of rollers 9, which fit in. the annular track 14, provided in the inner edge ofsaid member B, said rollers preventing lateral displacement of one member rela; tively to the other.

The member A is furthermore provided in its web and the rim with a series of radial openings 15," the same being equidistantli formed in the member and alternating .wit

series as the parts are ar- Theseradial openings accommodate the shoes 16, which are fitted snugly inthe openings and are free to have a limited radial movement therein. Each shoe is forked, bifurcated, or split for a part j of its length, as shown by Figs. order that the shoe may straddle or embrace l the annular channel .8, which is provided in l the rim, a d 'theseshoes. are provided at their It is evident, however,

the loose pulley member are provided at their 2 and 4,111

' screw-thread formed thereon at 22 tion of the member A outer end's with friction-faces 17, which are disposed in opposing relation to, the inner edges of the parts 11 12, comprising the idle member B. These friction-faces may consist of layers of compressed fiber or any other suitable material adapted to have the proper amount of frictional idle member B, and movable radially with said idle member.

Through the forked shoes extend the bridgeplates 18, which are fastened to the rim porand afford the tracksurfaces for the travel of the rollers 9 in case it is desired to allow these rollers to run idly in the coincident channels 8 14 of the members A B. These bridge-plates have arcuatc, outer edges disposed flush with the bottom of the channel8 in the rim, as indicated more clearly by Fig. 3.

Between the fixed bridge-plates 18. and the radially-movable shoes 16 are disposed the coiled springs impel the shoes inwardly with respect to the member A, and thus withdraw the frictionfaces 17 from engagement with the memengagementwith the said friction-faces are the shoes relatively to her B.

I will now proceed to describe the means by which the shoes are automatically moved radially in outward directions. The web 6 of the member A is provided with transverse slots 20, and across these slots are disposed the radially-movable stems 21, each having a for a part of its length and terminating in a head 23 at its outer end. A portion of each stem 21 plays loosely in a guide sleeve or socket 24, provided in the-hub portion of the member A,- each stem being free to rotate axially and. to have a radial movement. Ineach slot of the web is arranged a two-part or split nut 25, which when closed is adapted to have its threads engage with the male threads 22 of the stem. The members or parts of the, divided nut are embraced by the bifurcated end 26 of crumed on a suitable pin or bolt 28, supported on the member'A. The arms 26, formed by the bifurcation of the lever, are provided with cam-slots 29, which are engaged by the pins orstuds 30, attached to the members of the nut 25, and when the member 'A is-in motion the centrifugal force developed. by'said ing two of these member throws the lever 27 in outward-direction, thus imposing the action of the levers on the studs and allowing the members of the nut to close, so as to have engagement with the threaded stems 21.

provided with a weight 31, ings I have shown the fast and in the drawlike number of nuts which actuate the stems 21,-placed on diametrically opposite sides of the pulley. Each stem is furthermore provided with a ratchet 32, which is engaged by 19, which tend to normally a lever 27, the latter being ful- Each lever 27 is l member A as hav= levers adaptedto control aa lever 33, the latter fitting loosely on the stem to turn freely thereon and extending outwardly from the pulley member A, so as to fit in an opening 34, which is provided in a slidable bar 35. One of these slidablebars is used in connection with each stem, and each bar is loosely held for endwise movement in a pair of guide-lugs 36, provided on one face of the member A. Each bar has a-shoulder 37, against which acts one end of a coiled impellin -spring 38, the other end of which is seated against one lug 36. The free end of each slidable bar has a curved or beveled nose 39, and this bar is normally impelled by the spring 38 in one direction, so that its nose will'ride against the projecting edge of a camplate 40, carried by the idle member B. This cam-plate is loosely fitted on one of the through-bolts 1.3, and it is. provided with a corner thereof to project beyond the inneredge of the member B, to which said plate is attached. Between the head 23 of each stemand the inner end of one of the shoes is interposed a coil-spring 42, which serves to return the stem toits normal position; but on the outward movement of the stem the spring" is compressed and imparts a like movement to the shoe l6. 1 YVith the parts in their normal positions the stems 21. arepressed toward the hub of the member A by the s rings 42, and the weighted levers 27 are thrown inwardly in order to release the members of the nuts from engagement with the threaded portions 1 of the stems The member A rotates with the shaft of an engine or other part of machinery, while the member B remains atreist owing to its engagement With the belt which is to be driven. On therotation of the-ment ber A the levers 27 move outwardly by the IOK centrifugal energy developed by said ment-.110

her, and these levers turn on their {pier-a. 28." to make the cam-slots 29 acton the ins 30, thus securing the desired closingoft "e nuts 25. The bars 35 rotate withthe member A, and as they pass the cam-plat s 40- these bars are moved inwardly against" the energy of the springs 38. By pressing-the bars 35 backwardly the levers 33 are moved in order to turn the ratchets 32 and impart like movement to the stems 21 tion of the pulley member'A imparts aprogressive step- -step movement to thestems 21,which wor in theclose'd nuts 25, thus gradually moving the stems in: radial di The eqntinuedrota- 1 2o rections againstthe shoes 16. The shoes are I 2 5 the action of the feed mechanism heretofore described operates to clutch the member B 139 i parts .are then rotating u the cams will aain I tlon, by reason of t tightly to the member A, whereby the'load is gradually taken up and the member B is caused to rotate with the member A.

together at the the earns Wlll of course cease same speed; to act on the slippage occur between fore four in number, and two of these shoes thenut 53 by making thefriction-faees '17 5: feet in the web of the member are formed or securedthe bearing-lugs 44.

extend outwardly 44.) ..Each lever is provided provided in the lever.

screw 56, which finds a up the ride against the stems 16 moving the latter outwardly against the en 50 lie against the stems ride against the levers are provided with inwardly-extending stems (See Figs. '3 and 4.) into radial slots 43, which are provided A, and in the slots The lugs are dis osed in pairs to receive pmt'les and an a justable thrust-block 46, the latter fitting in recesses 47, which are provided at the knees o'f 'angu'lar levers 48, each.

lever having, an oflstanding arm 49, which carries an antifriction-roller 50.- "The levers osite sides of the hub and om the pulley. (See Fig. I with a slot or r pening 5.1 at a point intermediate of its length, and through. this slot'passes a fuldrum-bolt 52, which is screwed into the hub, said bolt having a nut 53 and supporting the are disposed on op The lever is held oosely on the fixed bolt and pressed against Said lever is also provided with a take-up threaded bearing in lever and which acts to take e parts. he provided for pair of levers 48 in one direction and making the rollers the inner portion of the against the pivoted block 46 in a wayk lost motion due to wear, of t Any suitable means may simultaneously moving the of the springs 19 and making the friction-faces 17 of the shoes engage with the member B. By reference to Fig. 4 it will le seen that in the normal positions of the levers .48 the rollers 50 lie to one side of the stems 16 on the shoes; but when the outer ends of the levers 48 are pressed apart these inner arms 49 are moved, so as to make the rollers Y 16 and force the shoes radially in outward directions, thus against the inner edge of the member B. The desired movement of the lovers 48 may be efiected by the employment of a slidable ted to member on a shaft, such as a cone ada' 48 and to be c anged I When the members and B are rotating A and These stems pro the action of the spring 52.

of the shoes, thuspress forci ly ploy a continuous series of ing tioiledspring-M; which fits in a socket 55,' b

. necessity of in, osition by the operationof a suitable matie clutch may be employed wherever it is desired to have the by the application of clutch mechanism.

It will also be understood that the levers 2'7 ma be operated by hand instead of by centri .ugal force to close the nuts and place the automatic set-up in operation.

Where the ulley is to be used as a tight and loose puley alternatively, I may em rollers 9 between the fast and loose members, as indicated in Fig. 3, thus equalizing the bearing and minimizing the friction of the member D on the member A.

My improved construction obviates the oiling the bearings of pulleys and wholly overcomes the cutting or wearout of the hub where it engages with the shaft, because there is no friction between the'shaft and the pulley, and the parts can not become clogged or worn. The clutch mechanism cannot slip in the rotary motion of the pulley, because any slipping will insure the rotation of the screw, which thereby tightens the parts and increases the frictional engagement of the shoes with the loose mem- The clutch mechanism as herein described may be modified within wide limits and may be applied to diiferent forms of clutches used for coupling and uncoupling running parts.

Having thus described vmy invention, claim as new and desire to secure by Letters Patent- 1. Aclutch comprising driving and drive members, movable shoes carried y one member to engage the other, means also carried by the one member for actuating the shoes, means actuated b the rotation of said member to automatica ly place said shoe actuating means in operative condition, and cooperating devices upon the two members whereby the rotation of one relatively to the other will automatically impart motion to the shoe-actuating means.

2. A clutch comprising members,

the ether, a screw mechvices upon the two members whereby the rotation of one relative to the other will automatically impart motion to the screw mechanism, means for throwing said screw mechanism. into and and means, for releasing the shoes when the screw mechanism is thrown out.

load gradually taken up movable shoes carried by one ,member to engage anism for actuating the shoes, cooperating deout of operative condition,

driving and driven I stem, a slide on one 3. A clutch comprising driving and driven members, a shoe carried by one member to engage the other, an adjusting-screw adapted to actuate the shoe, a divided nut, means for moving the parts of said nut into and out of engagement With the screw, andcooperat- 'ing devicesupon the two members whereby the rotation of one relatively to the other will automatically rotate the screw.

4. A clutch comprising driving and driven members, a shoe carried by one member to engage the other, a threaded stem adapted to actuate the shoe, a div' erable by the rotation of one of said members for moving the parts 'of said'nut into enga ement with the stem, and cooperating devices upon the tWo members whereby the rotation of the one relatively to the other will impart rotation to the stem'in the not.

5. A clutch comprising driving and driven members, a shoe carried by one member to engage the other, a threaded longitudinally-- movable stem to actuate said shoe, a-fixed nut in which the stem operates, a ratchet on the member in operative the ratchet, and a cam on member whereby a reciprocating connection with the other motion is imparted to said. slide When one members, a shoe carried member rotates relatively to the other.

members, a shoe carried by one member to engage the other, a threaded longitudinally movable stem to actuate said shoe, a fixed nut in which the stem operates, and means for imparting a. step-by-step rotation to the stem when one member rotates relatively to the other. Y

7. A clutch comprising driving and driven by the driving memher to engage the driven member,a threaded stem to actuate said shoe, a divided not adapted to engage the stem, a centrifugallyoperated lever connected with the parts of said nut to'automatically close the same upon the stem When. the driving member is rotated, and means for imparting rotation to the stem when one member rotates relatively to the other.

8. A clutch comprising driving and driven members, av shoe carried by one member to engage the other, a threaded stem to actuate said. shoe, a divided. nut adapted. to engage the stem, a lever having arms provided. with cam-slots, and projections on the out parisengaging said slots.

9. A clutch comprising ('lriviug and d ri vcii members, a shoe carried by 'one member to engage the other, a threaded stem to actuate said shoe. a nu t in which the stem operates, a ratchetlever, a bar slidably mounted on the shoe-carrying member in engagement with said lover, a spring for impellmg said bar in one direction, and. a cam on the other impelled m the member whereby said bar is driving and driven ded nut, means opl l I l i l the bridge-plat the shoe-carrying member to actuate said..-

shoe, and an adjustable cam on the other member adapted to set said mechanism in motion when one memben-rctates relatively to the other.

11. A clutchpulley comprising driving and driven members, coincident channels in the opposing surfaces of said members, a series of rollers in said channels, a forked shoe slidably mounted on one member to straddle the roller-channel and having faces adapted the other member, adjustint, said shoe.

12. A clutch-pulley comprising fast and loose members pr )vided in their opposing faces with coincident channels, bearing-rollers in said channels to support the loose member on the fast member and maintain it against lateral displacement thereon, forked shoes mounted for radial movement on the fast member and straddling the roller-chann el therein, said shoes having divided friction-facts presented to the loose member, and means for ad usting said shoes.

13. A clutch-pulley comprising fast and loose members, roller-bearings between said members, forked shoes on the fast member arranged to straddle the bearings and hav ing radial stems associated therewith, and means engaging said stems for moving the shoes radially.

14. A clutchpulley comprising a shaft member, a loose member, forked shoes movable-radially in the shaft member, bridgeplatos carried by the shaft member and ex tending .througi said shoes, fitted to the members and. adapted to ride on as, and means for moving said shoes into engagement With the loose mem. ber.

15. A clutch ep'ulley comprising a shaft member provided With a peripheralchannel, a loose member consisting of oomplemental sections united. laterally to complete said member and produce an internal channel to coincide with the channel on the shaft member, bearing-rollers fitted in said channels, forkei shoes mounted in the shaft member, bridge-plates spanning the shoes and afford ing traclesurfaces for the rollers, and means fo" adjusting the shoe.

in testimony vihereof I have tame to this specification in the are subscribing witnesses.

Vfivl. J. HILLTAR D.

signed my presence of itnesses:

JAMES H. OBRIEN, LEO V. SToEL'rZLEN.

and means for ioo ISO

Images