US1696340A

US1696340A - Distributor

Info

Publication number: US1696340A
Application number: US725337A
Authority: US
Inventors: Ernest A Bohlman
Original assignee: Kellogg Switchboard and Supply Co
Current assignee: Kellogg Switchboard and Supply Co
Priority date: 1924-07-11
Filing date: 1924-07-11
Publication date: 1928-12-25
Anticipated expiration: 1945-12-25

Description

Dec. 25, 1928. 1,696,340

E, A. BOHLMAN DISTRIBUTOR Filed July ll, 1924 2 Sheets-5heet l Y Ill l 2755/555/77//775 C n .QI s* EZZPU@ EjA. BOHLMAN DISTRIBUTOR Dc. 25, 192s; 1,696,340

Filed July ll, 1924 cs-Sheet 2 lulllulm" Patented Dec. 25, 1928.

UNITED STATES PATENT OFFICE.

ERNEST A. BOHLMAN, 0F CHICAGO, ILLINOIS, ASSIGNOR TO KELLOGG SWITCHBOABD AND SUPPLY COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION 0F ILLINOIS.

DISTRIBUTOR.

Application led July 11,

My invention relates to improvements in currentcontrollers commonly called ignition distributors for the electric ignition of ion-- ternal combustion engines, and is particu-v 5 larly intended for use in engines which are subject to various and sudden changes of speed, such as automobile engines and the like.

One of the objects of my invention is the' l0 provision of an ignition distributor which may be considered as universal in scope as the 5 same is designed so that it is adaptable for use withl different makes of internal combustion engines 'which utilizes an automatic spark advance mechanism.

Another feature of my invention is the provision of kan automatic spark advance control mechanism which is provided with adjustable means for adjustably controlling the angle or degree of advancement of the auxiliary rotatable shaft which is opera- Cil contact means of the distributor of my invention, that is, I have provided the automatic spark advance control mechanism of my distributor with adjustable means whereby I am able to regulate the degree of advancement of the sparking mechanism of my distributor so that my distributor may be utilized on differenty makes of internal combustion engines.

Another feature of my invention is the construction and arragement of the weighted members of my automaticr spark advance control mechanism which enables me to greatly reduce the size and weight ofthe said weighted members without interfering with the etticiency of my said mechanism. Prior to my invention the` weighted members, of the different types of automatic spark advance control mechanism, were very large and particularly thick which made them sometimes objectionable.

Still another feature of my invention is the provision of simple stop means for limiting the degree of movement ofthe 0 Weighted members ofthe automatic spark advance control mechanism of my distributor. j v

The above features, as well as others, will be morespeciiically pointed out in the entively associated with the ignition controllingy 1924. Serial No. 725,337.

suing specification, and for a clearer understanding of the same reference may be had to the `accompanying drawings in which like reference characters in the several views denote like parts.

Referring to the drawings:

Fig. 1 is a top plan view of the distributor of my invention with the top or cover thereof removed;

Fig. 2 is a sectional View in elevation of the distributor of my invention along the line 2 2 of Fig. l;

Fig.v 3 is a view along the line of Fig. 2 showing the automatic spark advance control mechanism of my invention in its normal inert position,and also showing the adjustable pins, for adjustably controlling the degree of advancement of the sparking control mechanism of my distributor, in one of their adjustably operable positions;

, Fig. 4 is a view similar to Fig. 3 but showing the automatic spark advance control mechanism in its fully operated position;

Fig. 5 is a bottom view of the automatic spark advance control mechanism of my invention along the line 5 5 of Fig. 2 and. showing the supporting plate, which supports the weighted members of said mechanism, in dotted lines;

Fig. 6 is a view similar to Fig. 3 but showing the manually adjustable control pins in a different adjustably operable position;

Fig. 7 is a view similar to Fig. 6 but showing the automatic spark advance control mechanism in its fully operated position.

Referring now in detail to my invention as illustrated in the drawings, the distributor of my invention comprises an cnclosing cup shaped casing EC which is provided with an integrally formed hub vor sleeve 1 having a central opening 2 `extending therethrough. The central opening 2 is adapted rto receiveya cylindrical rotatable driving shaft 3, which has a circumferential collar 4 integrally formed therewith and adapted to engage and rest upon the internal end 1y of the sleeve l, the said sleeve l serving. as a bearing for the rotatable shaft 3 and, as is apparent, theV collar 4 `of the shaft 3 bearing upon the end 1 of the sleeve l will prevent downward movement of said shaft 3. 'A cylindrical member 6 isk rovided and is adapted to lit over the en of the shaft 3 andvis retained thereon against lll dll

displacement and rotation relative to said shaft 3 by means of a plug 7 which engages suitably aligned openings in the shaft 3 and the said member 6, and to prevent the re mo val of said plug 'i' l provide a flexible coil S which engages a suitable circumfen ential groove 9 formed in the member (3 and in alignment with the openings engaged by the plug 7 whereby said plug 'i' lies in a plane within said coil 8. The member is adapted to prevent upward movement of the shaft 3 and is also adapted to tit into a suitable opening in a shaft of the engine with which my distributor' may be used. the connection of the member 6 with the engine shaft being such that rotary movement will be imparted to the shaft 3 by the engine when the engine is running.

The end of the shaft 3, having the circumferential collar et, is provided with an opening 10. the purpose of which will be pointed out later. A plate 12 is provided which has a suitable centrally located opening adapted to permit the said plate 12 to tit over the end of the shaft 3, whereby said plate 12 will engage the circumferential collar 1 of the shaft 3 and the end of said shaft 3 is then staked over to prevent the removal of the plate 12. and the engagement of the end of the shaft 3 in the opening in the plate 12 is such as will prevent rotary movement of said plate 12 relative to said shaft 3. rl`he plate 12 carries the control mechanism thatoperates to automatically advance the spark as the speed of the driving shaft increases. The plate 12 is provided with integrally formed

ears

111 and 15 each of which is provided with a suitable opening. Ting members 1G and 17 are also provided and integrally formed with the plate 12, each of said wing members being provided with a suitable opening.

The weighted members A and B of my automatic spark advance control mechanism are identical in construction and assemblage and are secured and supported on the plate 12 in the same identical manner so that a description of one will sutlice for a clear understanding of the other of said weighted members, the said weighted members being pivot'ally supported diagonally opposite each other on the plate 12.

The weighted member A. comprises a pair et angularly shaped members 2O and 21 of suitable metal and, which are suitably secured together so that the contour of the curved edges of said members coincide. and. also so that the. free ends of said members4 will coincide. A slot 22 is provided in the enlarged end of the member 21 and a-lso an opening 23 for purposes to be pointed out later. @ne end of the. member 2() is L- shaped and is provided with an opening 21. which is in alignment With the opening 23 in the member 21. The Weighted membe A is pivotally supported on the supporting member 12 by means of a pivot pin 25 which has its one end engaging the orifice in the wing member 1G and is suitably secured therein and to the said supporting plate 12 so that the collar 26, integrally formed with the pin 25, engages the upper face of the plate 127 while the other end of the pivot pin 25 extends through the aligned openings in the L-shaped end of the member 2() and the member 21, the said L-shaped end of the member 2t) engaging and resting upon the upper face of the collar 2G of said pivotI pin 25. To prevent the remo val of the weighted member A from its pivotpin 257 a split spring member 2T is provided, which adapted to rest in a circumferential groove. formed in the pin 25, so that said splitspring member 2T engages the upper face of the L-shaped end of the member 2() which will prevent the displacement of the said weighted member and at the same time allow rotary movement of the said weighted meniber on the pivot pin 25. The L-shaped end of the member 20 engaging the pivot pin 25 and the collar 2G7 the Weighted member A is separated from the supporting plate 12 for purposes to be subsequently pointed out.

An auxiliary shaft 3() is provided which has its one end C30 reduced to a size so that it will lit into the opening 1() provided in the end of the shaft 3 and also bring the tlange 31. formed integrally with the auxiliary shaft 30, into engagement with the end of the driving shaft 3 and a portion of the top face of the plate 12, said plate 12 and end of the shaft 3 forming a bearing for the auxiliary shaft 30. The opening 10 in shaft l is such as to permit movement of the auxiliary shaft 30 relative to said shaft 3. A plate $32, having a pair of openings 3? provided in each of its ends. is provided and has a central opening of a size to permit it to be slipped on over the end of the auxiliary shaft 30 and brought into engagement thereon with the flange 31. and a portion 531 of the shaft 3() is then staked over to secure the plate '32 in position on said shaft 30 against displacen'ient and rotary movement relative to said shaft 30.

The plate 32 is positioned between the supporting plate 12 and the weighted members A and B. A pin 3G is secured in one opening of one pair of the openings 33, while a pin 36 is secured in the corresponding opening in the other pair of openings 33 in the other end of the plate 32. The pins 3G and 3G are adapted to engage and protrude through the oblong slots 22 in the weighted members A and B respectively. the said pins 86 and 36 being of a size to permit their moving Within the said slots 22. The portions of the meml'iei 2O and 21 ot' the weighted members A and B opposite the auxiliary shaft 30 are shaped so lli) as to conform to the contour of said auxiliary shaft 30 so that the said weighted members A and B may assume the position as shown in Fig. 3 of the drawings. To maintain the weighted members A and B in their normal inert position and to `restore said members to their normal position. a pair of helical springs 38 are providt-d which have their one end engaging grooves in the free ends of a pair of pins 39 secured in the openings in the ears 14 and 15 of tne supporting plate 12, and their other end engaging circumferential grooves in a pair of pins 40 secured in suitable openings in the Weighted members A and B. The pins 40 extend downwardly and one of said pins is adapted to engage the face 12 of the plate 12 and the inner face41 of the wing member 16 and the other of said pins 40 adapted to engage the face 122'of plate 12 and the face 41 of the wing'n'iember `17 of the said plate 12 thereby serving also as stop pins for limiting the degree of rotary movement of the weighted members A and B, the said pins 40 engaging the faces 12 and 122 of the plate 12 also will prevent the weighted members A and B from engaging the auxiliary shaft 30. The plate 32 being secured to the auxiliary shaft 30 and also being disposed between the plate 12 and the weighted members A and B, and the pins 36 engaging the slots 22 in said members A and B it will be obvious that the auxiliary shaft 30 cannot move in a longitudinal direction to disengage the rotatable shaft 3, and consequently the assemblage of the various parts as just described above will be maintained. The ears 14 and 15 of the plate 12, in which the pins 39 are secured, are so positioned relative to the pins 4() secured in the weighted members A and B, that the helical springs 38 exert a pull upon the pins 40 at such an angle that the weiglited members A and B tend to assume their normal position as shown in Figs. 3, 5 and 6.

A late is provided which has an integra ly formed cup 46 in which is secured and supported any suitable standard type ball bearings 47 and ball bearing races 48, said plate 45 being supported in the casing EC ony ears 49 integrally formed with the easing EC and is held on said ears 49 by suitable screws 50 which pass through suitable openings in the plate 45 and have serewthreaded engagement with suitably tapped orifices in the ears 49. The heads of said screws() are sunk into the plate 45 so that their top surface is flush with the to surface of said plate 45. One of thel bal bearing races 48 is secured to t-he reduced end of the shaft 30 by a drive fit and rests upon the circumferential shouIder 51 of said shaft 30. A plate 53 rests upon the y lplate- 45 and a washer 54 tits around the shaft 30 yand rests upon one of the races 48, said plate 53 and washer 54 serve as separating means and also to prevent. foreign mattei' from getting between the ball bearing races 48. A felt washer 54 is provided which rests immediately below the washer 54 and is for the usual oiling and sealing purposes. A collar 55 fits over the shaft 3() and engages the washer 54,4 and a split ring 56 is provided which engages a circumferential groove 57 formed in the shaft 30 to prevent longitudinal movement of the different parts on the reduced portion of the shaft 30.

An insulation plate 59, a metal ring 6() and a metal conductii'ig plate 6i are provided which arc secured on the plate 45 by suitable screws 62, said ring 60 and plate 61 being insulated from the plate 53 and said plate 45 by the insulation plate 59, and suitable insulation bushings insulate the screws 62 from the ring 60 and plate 6.1. A pair of interrupter contacts 65 and 66 are pivotally supported by suitable pivot pins 67 and 68 respectively, which pins are suitably secured in openings in the ring 60 and plates 59 and r61 but suit-ably insulated therefrom and also do not have contactual engagement with the plates 45 and

Adjustable contacts

70 and 71 are provided which are secured to and supported on a pair of angular members 73 and 73', respectively, which are formed integrally with the conducting plate 61, said contacts and 71 adapted to make contactual engagement with the interrupter contacts 65 and 66 respectively. The interrupter contacts 65 and 66 are spring pressed into engagement with

contacts

70 and 71 rcspectively by spring members s and s. A cam member 72, having a central opening, is provided and is adapted to fit over the end of the shaft 30 and rest upon the split ring 56, so that the octonary peripheral edge 74 of the cam 72 rests between and is adapted to engage the insulation buffers 75 secured to the interrupter contacts 65 and 66. -f The end of the shaft 3() is split and a screw 76 has screw threaded engagement with said split end and is of such a size and shape that when screwed into the said split end, said .split end willy spread and engage the inner wall of the cam 72 to thereby prevent the removal of said cam 72 and to also prevent rotary movement of said cam 7 relative to the shaft 30.

The rotor element R of my distributor comprises a circularly shaped disk of suitable non-conducting material. A block 83 is formed integrally with the disk 8O and has its one end 84 cut down to form a step 85. Moulded in theblock 83 is a stud 86 which has one of its ends protruding above the step 85 and a contact spring 87 and a conducting member 88, having suitable inn llO

ment ivith the eontaet spring 8T and extends slightly beyond the end St ot' the bloelt 83 for purposes to be pointed out later. A eentral opening' Sl is provided in the disl; El() and extends partially into the bloel: S3. and is of a size and shape to tit loosely over the redueed end Q2 ot the eam .so that th. Collar 93 formed integrally ivith the dish S() rests upon the eireumiierential C'boulder 9% and the end of the openi: T' ill re upon the end ot the said redueed end and to prevent rotary movement of said disk S0 on the Cam 72 said eam T2 is provided ivith a pair of flat surfaees tf1-'tf and 95 adapted to engage similar tlat surtaees formed in the Wall of the central opening' Slt.

Air holes (L are provided in the easing FC tor permitting' air currents to pass into and out ot the interior ot my distributor.

A eover Cap or distributor hea d C@ is vided 'for my distributor vvnieh has a rality of suitable terminals 9T suitably secured therein and adapted to receive external conductors ivhieh have eonneetion ivith the spark plugs of the ei ine .vith ivhieh my distributor is used. their beine' a terminal 9T for eaeh spark plug'. The distributor is also provided ivith a suitable terminal 98 for reeeivineY an external eonduetor evtendine` trom a sonre of eurrent, or from a Coil. said cover eap or distributor head CC adapted to tit over the open end ot the easing' EC and rest upon a eireumterential shoulder 9S) formed in the easingv EC. To secure the head CC on the easing' EC against displai'ementv a pair ot spring' members 10() are provided and pivotally supported by suitable means on the side ot the easing' E@ Whieh members l0() are adapted to en a'ae'e a pair ot ears lOl vformed integrally with the eover Cap CC, and means are. also provided tor positioning' the eap relative to the easing' Then the distributor head CC is lin position on the eas ina' EC, shoivn in Fie'. 2. the 'tree end ot the eontaet spring 87 will engage the eonta"t member 102 seeured in the Verminal and the extending' end lOl, ot the eonduetiite` member 9S vvill be opposite. the inserted end of the terminal di but sligfhijly separated therefrom b v a small air grap. the eontaet spring' due to its spring tension will tend to hold the rotor element'v dov-fn on the earn Condenser C is provided and `ured on a fiaty portion o't the Casingv EC by suitrupt'er contacts (l5 and (i6 through a terminal .sereiv lll which has eonduetive eonneetion with the plate (il whieh is eonduetively connected with the interruper eontarts and 6G.

For manually adjusting' my distributor, lever ineehanism is eonneeted to the easing;r to osflillate the same. To limit the manual adjustment ot the easing the same is provided with an integrally 'formed braeket 112 u'hieh hasl a slot 11S.

Having described the construction of the distributor ot my invention, If will now give a briet description of its operation.

VWhen the engine with vfliieh my distributor is operatively assoeiated is runningVr or operati rotary motion ivill be imparted to the drivin;r shatt 3 and member whereupon said shaft 3 will rotate in and on the bearing sleeve l ot the easing' EC. The plate 'l2 being' secured to the shaft 3 against rotary movement will also rotate with the shaft 3 and, the auxiliary shaft 30 being operatively and rotatably associated with the driving' shaft 3 and. the. weighted members A and B beingl pivotally supported on the plate 12 and operatively connected to the plate secured to the auxiliary shaft 3, it ivill be at once apparent that the said auxiliary shatt BO together with the parts supported thereon ivill rotate simultaneously with the shaft l, so that the corners ot the eam 72 will rotate into engagement with the butlers T5 to operate the interrupter eontaets 6:7 and GG to cause the same to disene: i and engage the stationary contacts T0 and 'Tl respeetively thereby interrupting the ignition eireuit, The auxiliary shatt- 30 will rotate in s vm'hronism with the shaft 3 until a Certain rate ot speed ot' rotation is reaehed u'hieh speed will cause the weighted members A and l. pivotallj.' supported on the plate Yl2 and also positioned diagonally thereon. to move outwardly and away from tbe auxiliary shaft El() by eentritugal torre and overeome the spring tension ot the heli` soi-ings 3S. and the pins 5G and Sli selll) the position yof the said slots and said

pins

36 and 36 and the members A and B being pivotally supported on the plate 12 and' positioned diagonally opposite each other, the plate 32 will be rotated which in turn will rotate the auxiliary shaft 30 in an ad vanced or clockwise direction relative to the driving shaft 3, whereby the cam 72 secured on the shaft 30 will also rot-ate with the shaft 30 to an advanced position so that the corners of said'cam will make an earlier en-r gagement with the buffers 75 of the interrupter contacts 65 and 66 thereby advancing the spark as will be obvious to and understood by those skilled in the art. It will be obvious that the weighted members A and B can not move outwardly without moving the )late 32 and auxiliary shaft 30 in a ro tata ly advanced position relative to the shaft 3, due to the fact that the

pins

36 and 36 engage the slots 22 and, the weighted members A and B moving outwardly and away from each other attheir free ends a pull will be exerted upon the plate 32 in the same rotatable direction to cause the same to move rotatably on the shaft 3. The weighted members A and B will move out to their maximum extent, which movement is measured by the distance between the face .12 and the inner face 41 of the wing member 16 for the member A and by the distance between the face 122 and face 41 of the wing member 17 of the plate 12 for the member B, the pins 40 secured to the members A and B are adapted to move between these'faces respectively and to engage the same to limit the movement of said members A and B, to advance the spark a predetermined maximum amount when the speed of rotation has reached a certain rate of speed. When the speed of rotation has reached a certain rate of speed, and as the rate of speed decreases and drops below that necessary to maintain the weighted members A and B in their maximum operated position by` centrifugal force the springs 38 will, through the medium of the

pins

36 and 36 secured to the plate 32 and the slots 22 in the members A and B move the plate 32 and shaft 30 in a counter clockwise direction relative to the driving shaft 3 thereby retarding the spark as will be clearly understood by those familiar with the art. From the above it will be seen that the driving shaft 3 serves as a bearing for the auxiliary shaft 30 as well as for supporting the same. When the shaft 30 is rotating the free end of the contact spring 87 rotates under the contact 102 secured te the terminal 98 and the conducting` member 88 rotates with the rotor disk whereby the free end 104 of the conducting member 88 is brought opposite the inserted ends of the terminals 97 and Willestablish a sparking circuit with the articular terminal 97 whose inserted end 1s oppodescribed in Figures 3, 4 and 5. lVhen the pins 36 and/36 are engaging the openings 33 in the plate 32 as illustrated in Figs. 6 and 7 the auxiliary shaft 30 will be rotatably advanced to a much greater extent than when the said pins are positioned in the opening 33 as shown in Figs. 3, 4 and 5 the openings in the plate 32 in which the

pins

36 and 36 are .inserted as illustrated in Figsu and 7 are positioned at a 'greater angle with relation to axis of the auxiliary shaft- 30 than the openings 33 in the plate 32 in which the

pins

36 and 36 are located in Figs. 3, 4 and 5, so that as the weiglited members are moved outward about their pivoted points 25` the plate member is moved through a greater arc consequently rotatably advancing the auxiliary shaft 30 will at once be apparent from inspection of the drawings. The pins l36 and r36 are such as will permit the same to be readily secured in the desired openings 33 in the plate 32. lVhile I have only shown a pair of openings 33in each end of the plate 32 itis to be understood that other openings similar to openings 33 may be provided in said plate 32 to receive the

pins

36 and 36 whereby a different adjustment of the auxiliary shaft 30 may be obtained relative to the shaft 3. The operation ofthe automatic spark advance control mechanism as shown in Figs. 6 and 7 is the same as that described above in connection with the other figures of the drawings.

Thus it will be seen that by having a number of openings 33 adaptabley for receiving the pins 36 and 36 I am able to obtain practically any degree of rotatable advancement ofthe shaft 30 relative to the shaft 3 which obviously renders my distributor universal in scope as it may be utilized on practically any make of internal combustion engine requiring a distributor of the automatic spark advance type. y

While I have described a preferred embodiment of my invention it is to be understood that I do not wish to be limited to the exact structure, as shown and described, but that I intend to cover all changes and modiications which may come within the scope and spirit of the appended claims.

Having described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. A device of the character described including a driving shaft, a control member secured thereto, an auxiliary shaft having a split end adapted to be rotatable therewith and to be moved angnlarly with respect to said driving shaft, a cam member adapted to lit over said split end, a screw adapted to enter said split end to expand the same to secure said cam member to said shaft, centrifugally controlled means for connecting said auxiliary shaft to said driving shaft and for angularly moving said auxiliary shaft, means formed integrally with said control member for limiting the movement of said centrifugally controlled means, and adjustable means whereby said auxiliary shaft may be moved various amounts with respect to said driving shaft for full movements of said centrifugally controlled means.

2. A device of the character described including a driving shaft, a control member secured thereto, an auxiliary sh: ft having split end adapted to be rotated with said driving shaft and to be moved angularly with respect to said driving shaft, a cam member adapted to t over said split end, a screw adapted to enter said split end to expand the same to secure said cam member against movement relative to said shaft, centrifugally controlled means for connecting said auxiliary shaft to said driving shaft and for angularly adjusting said auxiliary shaft, means formed integrally with said control member for limiting the movement of said centrifugally controlled means, and means whereby said auxiliary shaft may be moved various amounts in response to movements of said centrifugal means from its normal to its fully operated position.

3. A device vof the character described inclnding a driving shaft, a control member secured thereto, an auxiliary shaft having a split end rotatable therewith but angularly adjustable thereto, a cam memberI adapted to fit over said splitr end, a screw adapted to enter said split end to expand the same to secure said cam member against movement relative to said shaft, centrifugally controlled means connecting said. auxiliary shaft to said driving shaft, means formed integrally with said cortrol member for limiting the movement of said centrifugally controlled means, and means wherel y said auxiliary shaft may be angularly adjusted different amounts in response to movements of said centrifugally controlled means from its normal to its fully operated position.

Ll. A distributor and timer of the automatic advance type including a drive shaft. an auxiliary shaft, having a split end, a cam member adapted to fit over said split end, a screw adapted to enter said split end to expand the same to secure said cam against movement relative to said auxiliary shaft, said cam adapted to be rotated to make and break an electrical circuit and means including a centrifugally controlled member for connecting said auxiliary .shaft to said drive shaft and for rotatably adjusting said auxiliary shaft relative to said drive shaft to advance the spark and other means whereby the mechanism may be adjusted so that the spark will be advanced different amounts in accordance with the type of engine with which the device is used.

5. A distributor of the automatic advance type including a drive shaft, an auxiliary shaft having a ,split end, a cam member adapted to lit over said split end, a screw adapted to enter said split end to expand the same to secure the cam against 1novement relative to said auxiliary shaft, said cam adapted to be rotated lo make and break an electrical circuit, centrifugally controlled means for rotatably adjusting said auxiliary sh: ft relative to said drive .shaft to advance and retard the spark and means for fully advancing and retarding the spark different maximum amounts in accordance with the type of motor with which the distributinis used.

G. A device of the character described including a drive shaft, a control member supported thereon, an auxiliary shaft having a split end adapted to rotate with said driving shaft and to be rotatably adj usted relative to said drive shaft, a cam member adapted to fit over said split end, a screw adapted to enter said split end to expand the same to secure said cam member against movement relative to said shaft, centrifugally con trolled means connecting said shafts, said centrifugally controlled means having a normal and a fully operated position, means formed integrally with said control member for limiting the movement of said centrifugally controlled means, and auxiliary means whereby said auxiliary shaft may be adjusted to move different amounts with respect to ,said drive shaft when said centrifugally controlled means is moved from its normal to its fully operated position.

7. A device of the character dcrribed including a drive shaft and an auxi tary member having a split end rotatable with said drive shaft and rotatably adjustable with respect thereto, a cam member adapted to tit over said split end, a screw adapted to enter said split end to expand the same to secure. said cam against movement relative to said auxiliary member, a centrifugally controlled member connecting said shaft and auxiliary member and adapted to rotatably move said auxiliary member a predetermined amount with respect to said drive shaft when said centrifugal member is operated over its full range of movement, means formed iiitegrally with said controlled member for limiting' its range of movement, and means for permitting said auxiliary member to be rotatably moved a lll!) lill) different amount with respect to said drive shaft when said centrifugal member is operated overl its fullrange of movement. n

8. A device of the character described including a driving shaft, an auxiliary shaft having a split end and a current interruptor adapted to fit over said split end and to be operated thereby,a screw adapted to enter said split end to expand the same to secure said current interrupter against movement relative to said auxiliary shaft, a centrifugally controlled member for connecting said auxiliary shaft to said driving shaft and for rotatably adjusting said auxiliary shaft and said current interrupter with rcspcct to said driving shaft, means formed integrally with said centrifugally controlled member for limiting the movement of; .said member, and adjustable means so that said current interrupter may be rotatably adjusted any desirable distance with respect to said driving shaft in response to movement of said centrifugal means from its normal to its fully operated position.

9. A device of the character described including a drive shaft, an auxiliary shaft having a split end rotatable therewith but angular-ly adjustable thereto, a current interrupter adapted to fit over said split end, a screw adapted to enter said split end to expand the same to secure the said current interrupter against movement relative to said auxiliary shaft, a control member rsecured to said drive shaft, a centrifugal member supported by said control member for connecting said auxiliary shaft and said drive shaft and for angularly adjusting said auxiliary shaft with respect to said driving shaft, adjustable means whereby said aux iliary shaftmay be moved various amounts with respect to said driving shaft for full movements of vsaid centrifugal member, and means formed integrally with said control member for limiting the movement of said centrifugally controlled member.

10. A device of the character described including a drive shaft, an auxiliary sha-ft having a split end, a cam member adapted to tit over said split end, a screw adapted to enter said split end to expand the same to secure said cam against movement relative to said shaft, ra centrifugally controlled member for connecting said drive shaft and said auxiliary shaft and for rotatably adjusting said auxiliary shaft relative to said drive shaft, said member consisting of a pair of plat-cs in contact with each other except at one extremity of said plates at which point they are separated, adjustable means whereby said auxiliary rshaft may be moved various amounts with respect to said driving shaft for full movements of said centrifugally controlled member, and a pivot pin extending through said plates at the point Where they are separated.

11. A device yof vthe character described including a drive shaft, an auxiliary shaft having a split end, a cam member adapted to fit over said split end, a screw adapted to enter said split end to expand the same to secure said cam against movement relative to said shaft, a weighted member for connecting said drive shaft and said auxiliary shaft and for rotatably adjusting' said auxiliary shaft relative to saiddrive shaft, said member comprising two plates normally in contact with each other except at one point where the plates are separated and are provided with orifices adapted to receive a` pivot pin for pivotally supporting said weighted member, `and :uljustable ymeans whereby said auxiliary shaft may be moved various amounts with respect tosaid driving` shaft. for full movements of said weighted member. f

l2. A device of the character described including a drive shaft, an auxiliary shaft having a split end, a cam member adapted to tit over said split end, a screw adapted to enter said split end to expand the same to secure said cam against movement relative to said shaft, a weighted member for connecting said drive shaft and said auxiliary shaft and forrotatably adjusting said auxiliary shaft relative to said drive shaft, said by said auxiliary'shaft may be moved various amounts with respect to said driving shaft for .full movements of said weighted member, and a groove in said pivot pin adapted to receive a member to prevent 1ongitudinal movement of said weighted member.

13. A device of the character described including a drive shaft, an auxiliary shaft having a split end, a cam member adapted to fit over said split end, a screw adapted to enter said split end to expand. the same to secure said cam against movement relative to said shaft, a weiglited member for connecting said drive shaft and said auxiliary shaft and for rotatably adjusting said auxiliary shaft relative to said drive shaft, said member comprising a pair of plates normally in engagement with each other except at one point where said plates are separated to provide spaced bearings for said weighted member', and adjustable means whereby said auxiliary shaft may be moved various amounts with respect to said driving shaft for full movements of said weighted member.

14. A device of the character described including a drive shaft, an auxiliary shaft having a split end, a cam member adapted to lit over said split end, a screw adapted to enter said split end to expand the same to secure said cam against movement relative to said shaft, a weighted member for connecting said drive shaft and said auxiliary shaft and for rotatably adjusting said auxiliary shaft relative to said drive shaft, said member comprising a pair of plates nor mally in engagement with each other except at one point where said plates are separated to provide spaced bearings for said weighted member, adjustable means whereby said auxiliary shaft may be moved various amounts with respect to said driving shaft for full movements of said weighted member, and a spring for returning said weighted member to its normal position, said spring lying in a plane between the planes of the spaced portions of the plates.

l5. device of the character described including a drive shaft, an auxiliary shaft having a split end, a cam member adapted to tit over said split end, a screw adapted to enter said split end to expand the same to secure said cam against movement relative to said shaft, a weighted member for connecting said drive shaft and said auxiliary shaft and for rotatably adjusting said auxiliary shaft relative to said drive shaft, said member formed of a pair of plates in engagement throughout the greater portion of their surfaces, a portion of one plate being formed to extend in a plane parallel to the plane of the main body portion of said plate, adjustable means whereby said auxiliary shaft may be moved various amounts with respect to said driving shaft for full movements of said weighted member, a pivot` member extending through said plates, and retaining means engaging said pivot memA ber at a point between said plates.

16. A device of the character described including a rotary shaft and a member attached thereto, an auxiliary shaft with a split end having a member attached thereto, a screw adaj'ited to enter said split end to expand the same. to secure said member attached thereto against movement relative to said auxiliary shaft, said auxiliaryY shaft adapted to rotate with said rotary shaft, a centrifugal member attached to the member attached to said rotary shaft, and means connecting said' centrifugal member to the member connected to said auxiliary shaft for rotatably adjusting said auxiliary shaft relative to said rotary shaft, said last means being adjustable so that said auxiliary shaft may be rotated various amounts with respect to said rotary shaft.

Signed by me at Chicago, in the county of Coohr and State of Illinois, this 7th day of July, 1924.

ERNEST A. BOHLMAN.