US1128684A - Change-gearing. - Google Patents

Description

E. G. JOHANSON.

CHANGE SHARING.

APPLwATIoN HLED 001.30, 1013.

1,128,684. Patented Feb. 16, 1915.

Gigi

' i" it subject ofthe King of Sweden, residing at4 UNITED' STATES ,PATENT vonirica.

EMIL G. JOHANSON, OF.CHICAGO, ILLINOIS, ASSIGNOR T0 `SVEN ALBIN MLIN, OF

CHICAGO, ILLINOIS.

CHAN GE-GEARIN G.

Specicatlonof Letters Paten-t.

Patented Feb. 16, 1915 Application @led ctober 30, 1913. Serial No. 798,193.

-To all 'whom 'it may concern:

Be it known that I, -EMIL G. JoHANsoN, a

Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in ChangeGearing, of which the following is a specification- My invention relates to speed changing mechanisms and has particular reference to simple and compact mechanism adapted for automobiles andthe like where speed changes `are frequently made, where it is` desirable to take up a minimum of space, inclose the gears and avoid sudden jarrings .incidental to throwing gears into and out of mesh -With each other. A

In thepresent invention the gears are always in mesh for the different speeds, those not acting rotating idly, and all incased in a casing part of which is utihzed as a driving p art for the gears; and the invention consists in the novel construction, combination and arrangement of parts all as hereinafter described in detail, illustrated in the accompanying drawing and more particularly pointed out in the appended claim.

In the drawing-Figure v1 is an edge view showing the outside of a casing and change gear mechanism embodying my invention. Fig. 2 is a section taken substantially on line 2-2 of Fig. 3. Fig. 3 is a section taken substantially on line 3 3 of Fig. 2. Each of Figs. 4 to 8, inclusive,represents one ofthe different sets of gears shown in Fig. 3.v Fig. i) is an enlarged perspective view of av broken away portion of gears showing the relative toothed arrangement whereby the vdifferent speeds are obtained.

In the several views 2 represents a drumshaped orcylindrical casing one side Wall 3 of which is rotatably mountedv at-its edges ing ,may-be termed the motor element on s which is a wrist pin 9 which may be cony nected with the piston of the usual engine (not shown).

From the inner ace'of the motor element, or disk 3 projects a spindle or stud-shaft l0 on which is rotatably Yextension from the extension' 15.

lmounted'a pinion or gearwheel 11 which meshes with a plurality of gears that are revolubly mounted on the Ashaft 7 and 1abeled 12, 13 ahd'14. The pinion 11 isalso in mesh'with a fixed gear Wheel 15 which projects` from the inner face of a wall 16 of the casing and may be an integral part of said wall. The toothed Wheel 11 is therefore substantially four pinions secured together and the portion of said wheel or pinion meshing with the. fixed gea-r 15 is distinguished from its remaining portion by the numeral 17. Between thisportion and the vportion labeled 11 is loosely mounted on a hub prtion 19 of the pinion 11i-(17, a pinion or gear Wheel 18 whichV is lthick enough to mesh with a fixed gearwheel 20, (which may also be an integral part of the wall 16 and wheel 15,) and a gear wheel 21. The Wheel 20, like the wheel 15, is fixed relative to the wall 16, ora toothed annular Then the disk or casing Wall 3 is rotated the pinion 11 will be rotated by'reason of the mesh of its portion 17 with-the toothed poras shown in Fig.' 3, is larger in circumference'than the pinion 11, or its portion 17,

while thestationary ring of teeth 20 is smaller inl circumference than the' stationary ring A'of teeth 15. The pinion 18 will therefore be rotated at a slower rate of speed than the pinions 11 and 17. If the loose gears 12, 13 and 14 had the same num-V ber of teeth, respectively, as the pinion 11` they would, of course remain stationary while the pinion 11 rotated about the ring of teeth 15. The same would be true of the loose gear wheel 21 in its relation with the pinion 18 and ring of'teeth 20.

Motion is imparted 'to the wheels 12, 13,

14, and 21 by providing the first three with larger numbers of teeth than contained on the ring of teeth 15 and providing the wheel 21 with more teeth than the number provided for the wheel 20. The wheels 15 and 2 0 may be termed fulcrum wheels and the pinions 11|-17 tand 18 driving or master wheels or`pinions. In the illustration the fulcrum wheel 15 is provided with 30v teeth while the Wheel 13 has 31 teeth. The latter wheel will therefore be moved the distance of one tooth at each complete rotation of the pinion 11, or 17, about the wheel 15'. The' wheel 12v is' provided with 32 teeth, which y makes its' speed of rotation double that'of the'wheel 13. The wheel 14 is provided with 33teeth, making its speed three times that of the wheel 13. The fulcrum-wheel carries 2 '0 teeth while the wheel 21 has 21 teeth',l which gives the slowest of the fourspeeds' shown in Figs. 3 to 8, inclusive, by reason of the fact that the driving or master pinion 18 is larger and rotates slower than the pinion 11, andthe circumference of and number of teeth on the Wheel 2O is smaller than that of the wheel 15.` In the arrangements shown to either of these wheels consists of the folI lowing parts: Each ofl the wheels 12,13, 14 and 21 is providedwith preferably four key-seats 39 tobe engaged by a series of vfour keys 40,41, 42 and 43 which are lateral projections on arms 44, pivoted on lugs 45 projecting from the inner face of a' head 46 slidably mounted in a bore 47 in the hub of sprocket wheel 8. The arms'44 are placed in slots 48 formed in the periphery of the 30 l shaft'7. The head146 is more firmly supported by a spindle 49 which projects rigidly from the head and Y.islongitudinally slidable in a bore 50 through the axis of the.

shaft 7. y The latter is proifided with a flange 51 between which and the. wheel 14 is interposed a Washer 51. To the flanged end of the shaft, which is flush with the outer surface of the disk or wall 3, is secured a' washer 52 which is larger than the opening for the shaft through said disk or wall.

The washer 52 is 'fastened byA a screw 53l which has threaded engagement with a screw hole in the end of the shaft as shown in Fig. 3. The arms 44 are tensioned to spread apart and force the keys into their4 seats, by means of springs 54 which are each secured to its arm 44 at one end and bear Yalzarmi with the other end a ain'st' the spindle '49.

The hub of the sproc et wheel 8 1s secured to the shaft 7 by means of a. set screwJ 55 or by any other suitable means. Looking at Fig. 3 the shaft 7 and its parts are assembled by inserting the shaft from below through the shaft-'openings in the loose gear .wheels and casing until the flange 50 4contacts with the washer 51. The sprocket wheel is then keyed to the shaft. Finally the spindle 49 is inserted from the upper end'of the shaft, together with the arms 44. In Fig. 3 the keys 40 to 43 are shown engagement with the wheel 21, the lowest speed. The mechanism for moving the keys from that position into engagement with Y either of the other wheelsl land holding th"` keys in the adjusted position consists of lever 56 pivoted at5; to a lug 58f-on the casing'2, and at 59 toa lug 60 on the head 46. This lever is provided with a movable detent56 that may be engaged with 'either of four notches 61, `62, 63v 01264 in a bar65 extending rigidly from the casing.

Having thusA described my invention, =Ix

claim as new and desire to secure by Letters Patent- Y The combination with a drumsshaped casing, one end or plane-side of which is revoluble,` of a shaft mounted vin said casing and serving as the axis of rotation for said end or plane-side, a set of change gears of equal diameters carried by said side, means to control the rotation of said gears, means toconnect said gears tothe shaft,`and means for changing the connections of said gears and varyingl the speedl of rotation 'of said shaft, said means being operable through the end of s'aid shaft.

In testimony whereof I have hereunto set.

my hand in the presence of two subscribing witnesses.

EMIL G. JoHANsoN.

W itnesses JNO. il. NnLsoN, EDWIN B. NELSON.

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