USRE14398E - Sheet - Google Patents

Description

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worm DRIVE AxLE STRUCTURE.

APPLICATION FILED IULY`5I 19|?.

lieissued Nov. 27, 1917.

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UNITED STATES PATENT OFFICE.

THOMAS J' LINDSAY, 0F INDIANAPOLIS, INDIANA, ASSIGNOR TO LINDSAY AUTO PARTS COMPANY, A CORPORATION OF INDIANA.

WORM-DRIVE AXLE STRUCTURE.

Specification of Reissued Letters Patent. Reissued N0V 27, 1917 Original No. 1,088,660. dated August 27. 1912, Serial No. 684,575, led Hatch 18, 1912. Application for reissue led July 5, 1917.

To all whom it may concern:

Be it known that I, THOMAS J. LINDSAY, a citizen of the United States, residing at Indiana lis, in the county of Marion and State of In inna,.have invented a new and useful Worm-Drive Axle Structure, of which the following is a specication.

The object of my invention is to produce a convenient and economical power transmission unit for driving axle structures for automobiles, comprising a differential gearing or compensator, a riving worm. and an inclosing casing structure, the arrangement being such that the unit may be readily' assembled and adjusted on a bench and then embodied in an axle structure with the driving worm arranged either above or below the compensator.

One of the chief objects of my invention is to provide a worin drive axle structure' having a differential driving unit, including differential gearing, a drive shaft, and Worm gearing connecting said drive shaft and said diil'erential gearing, which differential driving unit is so mounted with reference to the ax e housing that it is readily accessible and removable so that this unit may' be removed rfrom the axle structure for the purposes of adjustment, replacement or inspection without disconnecting the axle vstruizture from the vehicle frame to which it is con nected;

The accompanying drawings illustrate my invention. Figure 1 is a transverse section of the complete unit; Fig. 2 an elevation1 `with the cover oi' the casing removed, and

the differential gearing in section, and with fragments of coperatin shaft units in place; Fig. 3 a section similar to Fig. 1, but with the driving worm above the di'erential gearing; Fig. 4 a section on line 4-4 of Fi 2; and Fig. an elevation, on a smaller sca e.

In the drawings. 10 indicates a, central casing member having a readily removable cap or cover 11. This central casing member 10 is formed, at axially opposite portions, so as to receive oppositely extending tubular shaft-Carr ing casing members 12, 12, in each of W ich is rotatably mounted a shaft section 13, as fully set forth in my Patent No. 1,097,653 issued May 19, 1914.

In the central casing member 10 I form Serial No. 179,647.

two seats or pockets 14, 14 each of which is complemented bv a cap 14 detachably secured in place by bolts 15. The pockets 14, 14 are formed to receive the hubs 16, 16 of a cage which is formed by two mating members 17, 17.- Cage 17-17 is provided with two alined pockets 18, 18 in each of which is mounted a roller bearing 19.

The main body of the compensator or diferential gearing is formed with two oppositely extending trunnions 21, 21, which are supported by the bearings 19, and the said main body carries a main worm gear 22. The center gears 23, 23 of the diiferential gearing have a non-rotative, axially and transversely separable, connection with the adjacent ends of the shafts 13.

The two cage members 17, 17 are preferably similar and each is provided with an `open-bottom bearing-pocket 211. These bearing pockets are formed in a lateral extension of the cage and are in alinement, with their common axis at right angles to and laterallyr offset from the axis oi thecasing 10-P12 and of the trunnions 21, and said pockets are on opposite sides of the plane which contains said casing axis und is perpendicular to the axis of said bearing pockets. Each of the pockets 24 receives a roller bearing 25, and arranged against the inner end of each pocket is a thrust bearing 26. Mounted in the bearings 25 and pro]ected throu h the bearings 26 and across the aforesaid p ane is a driving shaft 27 co-axial with said pockets; and splined upon this shaft, between the thrust bearings 26, is a driven worm 28 which meshes with the worm-Wheel 22 in such plane.

The central casing member 10 is formed with a transverse pocket 31, into which the pockets 24 of the cage 17 project, and this portion of the cage 17 is held between an inwardly projecting flange 32 `02E-the casing member 10, and the part 11 of cover 11. At 83 the casing 10 is formed to receive the rear end of a torque tube 40 which may house a main power or propeller shaft 4l connected, by an axially separable joint, with the shaft 27.

The casing member 10 is provided, top and bottom, `with a crotch 3% for the reception of the usual brace rod 35 the ends of which are to be connected in a suitable manner to joints near the outer ends of the tubular casing members 12, as in the manner shown in my above mentioned patent.

In assembling the various parts of my device, Worm Wheel 22 may be arranged to take the thrust in either direction by merely reversing the cage, end for end, in the casing. The Worm 28 may also be readily reversed on shaft 27.

If an under drive is desired the casing member 10 will be arranged as shown in Fig. 1, While if an over drive is desired, in order to give greater road clearance, the casing member 10 may be turned end for end relative to the tubular casing members 12 and then swung 180o into the position shown in Fig. 3.

By'removing cover 11 and caps 14', the

univ-consisting of the cage 17, the di'erential gearing, and the driving worm and its shaft and bearings-may be bodily withdrawn from the casing member 10 Without disturbing the adjustment of any of the bear ings and without disconnectin the torque tube from the casing member o the driving axle structure.

It will be observed that I can remove the differential driving unit from the axle housing Without disconnecting the axle structure from the vehicle to which it is attached. To do this, I, first, remove the cap or cover 11, as indicated above, andk I then removethe caps 14" which hold the hubs 16 of the cage in the seats or pockets 14. The shaft sections 13 are turned until they are lined up, as indicated in Fig. 2, and the differential driving unit can then be removed bodily by a lateral movement through the rearwardly facing openingr closed by cover 11. The "axially separable connection between the drive shaft 27 and the propeller shaft'41 permits of this movement without disconnecting the torque tube 40 and the bodily removal of the differential driving unit can be accomplished Without disconnecting the axle structure from the vehicle frame. It will be seen that this bodily removal of the differential driving unit does not affect or disturb any of the bearing adjustments and the bearings can be adjusted when the cage containing the differenti-,ii driving unit 1s placed on a convenient Work bench. The parts going to make up this driving unit can be disassembled by separating the mating members 17 forming the cage.

All of the bearings ofthe differential gearing, and the driving Worm and shaft may be adjusted accurately with the cage 17--17 011 a convenient bench and then the unit placed securely Within the casing member 10 without the necessity of any readjustment.

I claim as my invention:

1. A driving axle structure, comprising a casing, a cage detachably mounted in the casing and reversible therein end-for-end, said cage having' a lateral extension, shaft bearings carried by said extension with their axis transverse to and laterally offset from the axis of the casing, a drivin shaft carried in said shaft bearings an extending across the plane which contains the axis of the casing and is perpendicular to the axis of said shaft bearlngs, differential gearing mounted in said cage, and worm caring carried by and connecting said riving shaft and said differential gearing and meshing in the aforesaid plane. A

2. A driving axle structure, comprising a casing, a cage detachably mounted in the casing, said cage having a lateral extension, shaft bearings carried by said extension with their axis transverse to and laterally offset from the axis of the casing, a driving shaft carried in said shaft bearings and extending across the plane which contains the axis of the casing and is erpendicular to the axis of said shaft bearmgs, differential gearing mounted in said cage, and worm gearing carried by and connecting said driving shaft and said differential gearing and meshing in the aforesaid plane.

3. In a driving axle structure, the combination of a pair of oppositely extending tubular casing members, shaft sections rotatably mounted in said tubular casin members, a central casing member formed at its ends for detachable engagement with either of the tubular members, said central casing member having a transverse perforation the axis of which is offset from the axis of the casing, a cage detachably mounted in the central casing member and having a lateral extension, said cage bein reversible end-forend in the casing, shaftearings carried by the lateral extension of the cage with their axis in alinement with said transverse perforation, 'a driving shaft carried by said .bearings and extending across the plane which contains the axis of the casing and is perpendicular to the axis of said shaft bearings, differential gearing mounted in said cage, and worm gearing carried by and connecting said driving shaft and Said differential gearing and meshing in the aforesaid plane. v

4. In a driving axle structure, the combination of a pair of oppositely extending tubular casing members, shaft sections rotatably mounted in said tubular casing members, a central casing member formed at its ends for detachable engagement with either of the tubular members, said central casing member having a transverse perforation the axis of which is offset from the axis of the casing, a cage detachably mounted in the central casing member and having a lateral extension, shaft bearings carried by the .lateral extension of the cage with their axis in alinement with said transverse perforation, a driving shaft carried by said bearings and extending across the plane which contains the.axis of the casin and is perpendicular to the axis of sai shaft bearings, differential gearing mounted in said cage, and worm gearing carried by and connecting said driving shaft and said differential gearing and meshing in the aforesaid lane.

5. In a driving axle structure, t e combination of a pair of oppositely extending tubular casing members, shaft sections rotatably mounted in said tubular casing members, a central casing member formed at its ends for detachable engagement with either 1h of the tubular members, said central casing member having a transverse perforation the axis of which is offset from the axis of the casing, a cage'detachably mounted in the central casing member and havin a lateral extension, Said cage being rcversib e end-forend in the casing, shaft bearings carried by the lateral extension of the cage with their axis in alinement with said transverse perforation, a driving shaft carried by said 2b bearings and extending across y the plane which contains the axis of the casing and is perpendicular to the axis of said shaft bearings, differential gearing mounted in said cage, worm gearing carried by and connect- B0 ing said driving shaft and said differential gearing and meshing in the aforesaid plane, a torque tube connected to the centra casing member around its transverse perforation, and a ropeller shaft mounted therein, said propel er shaft and driving shaft being connected together and axially separable.

6. In a driving axle structure, the combination of a pair of oppositely extending tu Y. bular casing members, shaft sections rotatably mounted in said tubular casing members, a central casing member formed at its ends for detachable engagement with either of the tubular members, said central casing member having a transverse perforation the axis of which is offset from the axis of the casing, a cage detachably mounted in the central casing member and having a lateral extension, shaft bearings carried by the lat- 4eral extension of the cage with 'their axis in alinement with said transverse perforation, a driving shaft carried by said bearings and extending across the plane which contains the axis of the casing and'is perpendicular to the axis of said shaft bearings, differential caring mounted in said cage, worm gearmg carried by and connecting said driving shaft and said differential gearing and meshingin the aforesaid plane,a torque tube connected to the central casing member around its transverse perforation, a propeller shaft mounted therein, and an axially separable driving connection between said propeller shaft and said driving shaft. 68 7. A driving axle structure comprising a casing, a cage detachably mounted in the casing, said cage having a lateral extension,

co-axial shaft bearings carried by said extension with their axis transverse to and laterally offset from the axis of the casing, one 70 of said shaft bearings being located on each side of the plane which contains the axis of the casing and is erpendicular to the axis of said shaft bearings, a drivin shaft carried in said shaft bearin an extending across such plane, di erential gearing mounted in said cage, and a worm gearin carried by and connecting said driving sha t and said differential gearing and meshing in the aforesaid plane.

8. A driving axle structure, comprising a pair of oppositely extending tubular casing members, a central.- casing member formed at its ends for detachable en agement with said tubular casing mem ers, shaft sections rotatably mounted Within Said casing members, said central casing member having a lateral opening, a cage detachably mounted in the central casin member and insertible and withdrawable y way of such lateral opening, said cage having a lateral extension and being reversible endfor-end in said central casing member, shaft bearings carried by said extension with theiry axis transverse to and laterall offset from the axis of the casing, a riving shaft mounted in said shaft bearings and extend- -ing across the plane which contains the axis of the casin and is perpendicular to the axis of such sha bearings, differential gearing mounted in said cage, and worm gearing carried by and connecting said driving shaft and said differential gearing and meshing in the aforesaid plane.

9. A driving axle structure, comprising a pair of oppositely extending tubular casin members, a central casing member forme at its ends for detachable enga ement with said tubular casing members, s aft sections rotatably mounted within said casing members, said central casing member having a lateral opening, a cage detachabl mounted in the central casin member an insertible and withdrawable y way of such lateral opening, said cage havin a lateral extension, shaft bearings carrie by said extension with their axis transverse to and laterally offset from the axis of the casin a driving shaft mounted in said shaft bearings and extendin across the plane which contains the axis o the casing and is perpendicular to the axis of such shaft bearings, differential gearing mounted in said cage, and worm caring carried by and connecting said riving shaft`and said differential gearing and meshin in the aforesaid plane.

10. A dr1ving axle structure, comprising a pair of oppositely extending tubular casing members, a central casing member formed at its ends for detachable engagement with said tubular casing members, shaft sections rotatably mounted within said casing members, said central casing member having a lateral opening, a cage detachab] mounted in the central casing member an insertible and withdrawable by Way o such lateral opening, said cage having a lateral extension, shaft bearings carried by said extension with their axis transverse to and laterally offset from the axis of the casing, a driving shaft mounted in said shaft bearings and extending across the plane which contains the axis of thecasing and is perpendicular to the axis of' such shaft bearings, differential gearing mounted in said cage, worm gearing carried by and connecting said driving shaft and said differential gearing and meshing in the aforesaid plane, a propeller shaft, and a separable connection between said propeller shaft and said drivin shaft.

11. driving axle structure, comprising an axle housing having a lateral opening therein; a ca normally closing said opening; driven s aft sections rotatably mounted in said axle housing; and a differential driving unit for driving said shaft sections, comprising a cage, a driving shaft journaled therein, a driving worm carried b said shaft, and worm gearing meshing wit said worm and having drivin connections with said shaft sections, the said differential driving unit being removably supported within said axle housing independently of said cap and being removable bodily through the opening closed by said cap.

12. A driving axle structure, `comprising an axle housing, having a rearwardly facing opening therein; a cap normally closing said opening; driven shaft sections rotatably mounted in said axle housing; and a differential driving unit for driving said shaft sections, comprising a cage; a driving shaft journaled therein; a driving Worm carried by said shaft; and worm gearing meshing with said worm and having driving connections with said shaft sections, the said differential driving unit being removably supported within said axle housing inde endently of said cap and being removablie bodily through the opening closed by said cap.

13. A driving axle structure, comprising the combination of an axle housin driven shaft sections rotatably mounte in said housing; and a differential driving unit having driving connections With said shaft Selctions and comprising a cage mounted in said housing; Worm gearing carried thereby, a driving shaft journaled in said cage beneath said Worm gearing, and a driving worin on said'shaft meshing with said worm caring, said differential driving unit, including said drive shaft and worm, being removable bodily from said housing.

y 14. In a driving axle structure, the combination of a pair of oppositely extending tubular casing members; shaft sections rotatably mounted in said tubular'casing members; a central casing member formed at its ends for detachable engagement with either of the tubular members, said central casing member having a transverse perforation, the axis of which is otl'set from the axis of the casing; and a differential driving unit mounted therein and removable therefrom without disconnecting said axle structure from the vehicle frame, said unit comprisin a cage detachably mounted in the centra casing member and having a lateral extension; shaft bearings carried by the lateral extension of the cage with their axis in alinement with said transverseperforation; a driving shaft carried by said bearings and extending across the plane which contains the axis of the casing and is perpendicular to the axis of said shaft bearings; differential gearing mounted in said cage; and worm gearin carried b and connecting said driving s aft and sai differential gearing and meshing in the aforesaid lane.

15. In a driving axle structure, t e combination' of a pair of oppositely extending tubular casing members; shaft sections rotatably mounted in said tubular casing members; a central casing member formed at its ends for detachable engagement with either of the tubular members, said central casing member having a transverse perforation, the axis of which is offset from the axis of the casing; a cage detachably mounted in the central casing member and havin a lateral extension; shaft bearings carried y the lateral extension of the cage with their axis in alinement with said transverse perforation; a driving shaft carried by said bearings; differential gearing mounted in said cage; and worm gearinglcarried by and connecting said driving s aft and said differential gearing.

16. In a driving axle structure, the combination of an axle housing; shaft sections rotatably mounted therein; a differential driving unit connected with each of said shaft sections and comprising a cage removably supported within said housing and r0- vided with a pair of alined bearingsja dli'ive shaft journaled in said bearings, differential gearing mounted in said cage, worm ring connecting said drive shaft and sai differential gearing; a propeller shaft; and an axially separable connection between said prope ler shaft and said drive shaft located adjacent one of said drive shaft bearings.

17. In a drivin axle structure, the combination of an axleousing; shaft sections rotatably mounted therein; a cage supported in seats formed in said axle housing; releasable means for securing said cage in said seats; a drive shaft journaled in said cage and extending across the vertical lane containing the axis of said casing; ifferential gearing mounted in said cage and detachably connected with said shaft sections; a Worm gear for driving said differential gearing; and a Worm on said drive shaft meshing with said worm gear.

18. A driving axle structure, comprising a casing; and a differential driving unit mounted therein and removable therefrom without disconnecting said axle structure from the vehicle frame, said unit comprising a cage detachably mounted in the casing, said cage having a lateral extension, a driving shaft journaled in said extension and extending across the vertical plane which contains the axis of the casing, a differential gearing mounted in said cage, and Worm gearing carried by and connecting said driving shaft and said differential gearing and meshing in the aforesaid plane.

19. A driving axle structure, comprising an axle housing, having a rearwardly facing opening therein; a cap normally closing said opening; driven shaft sections rotatably mounted in said axle housing; and a differential driving unit for driving said shaft sections, comprising a cage removably secured within said axle housing independently of said cap, differential gearing Journaled in said cage and including a worm gear, said differential gearing bein con-y nected with said shaft sections, a riving shaft 'ournaled in said cage, and a worm carri by said driving shaft and meshing with said worm gear, said differential driving unit being removable bodily through the openi closed by said cap.

20. n a driving axle structure, the combination of a pair of oppositely extending tubular casing members; shaft sections rotatably mounted therein; a central casing member connected at its endsto said tubular members, said central casing member having a transverse perforation, the axis of which is offset from the axis of the casing* a cage detachably mounted in the central casing member and having a lateral extension; shaft bearings carried by the lateral extension of the cage with their axis in alinement with said transverse perforation' a driving shaft carried by said bearings and extending across the plane which contains the axis of the casing and is perpendicular to the axis of said shaft bearings; diferential gearing mounted in said cage; and worm gearing carried b and connecting said drivings aft and sai diiferential gearing and meshing in the aforesaid plane.

1. A driving axle structure, comprising a casin and a differential driving unit mounte therein and removable therefrom without disconnecting said axle structure from the vehicle frame, said unit comprising a cage detachably mounted in the casing, said cage having a. lateral extension; shaft bearings carried by said extension with their axis transverse to and laterally odset from the axis of the casing; a driving shaft carried in said shaft bearings and extending across the plane which contains the axis ofj the casing and is perpendicular to the axis of said shaft bearings; a differential gearing mounted in said cage; and worm gearing, carried by and connecting said riving shaft and said differential gearing, meshing in the aforesaid plane.

22. A driving axle structure, comprising a casin and a differential driving unit mounte therein and removable therefrom without disconnecting said casing from the vehicle frame to which it is attached, Said unit comprising a cage detachably mounted in the casing, said cage having a lateral extension; co-axial shaft bearings carried by said extension with their axis transverse to and laterally offset from the axis of the casing, one of said shaft bearings being located on each side of the plane which contains the axis of the casing and is perpendicular to the axis of said shaft bearings; a driving shaft carried in said shaft bearings and extending across such plane; differential gearing mounted in said cage; and a worm earring carried by and connecting said driving shaft and said differential gearing and meshing in the aforesaid plane.

23. A driving axle structure, comprising the combination of a casing; a cage detachably mounted in said casing; differential gearing mounted in said cage; shaft bearings carried by said cage, with their axis transverse to and laterally offset from the axis of the casing; a driving shaft carried in said shaft bearings and extending across the plane which contains the axis of the casing and is perpendicular to the axis of said shaftI bearings; a worm on said shaft; said shaft bearings comprisin anti-friction means for taking both the oad and thrust located on each side of said worm; and a worm gear carried by; said differential gearing an meshing wit said worm.

24. A driving axle structure, comprising the combination of a casing; a cage detachably mounted in said casing; differential gearing mounted in said cage; shaft bearings carried by said ca with their axis transverse to and latera 1y offset from the axis of the casing; a driving shaft carried in said shaft bearings and extending across the plane which contains the axis of the casin and is perpendicular to the axis of said s aft bearings; a worm on said shaft;

said shaft bearings including thrust bearings disposed on opposite sides of said worm; and a worm gear carried by said differential gearing and meshing with said worm.

25. A driving axle structure, comprising the combination of a casing; a detachably mounted in said casing; iierential gearing mounted in said cage; shaft bearings carried by said ca e, with their axis transverse to and latera ly offset from the axis of the casing; a driving shaft carried in said shaft bearings and extending across the plane which contains the axis of the easing and is perpendicular to the axis of said shaft bearings; a worm on said shaft; said shaft bearings including anti-friction bearings, located on opposite sides of said Worm, for taking the thrust in opposite diJY said said r carried bly; meshing wit the casing and .is perpendicular to the axis of said shaft bearings; differential gearing mounted in said cage; drivin connections between said shaft sections an ential gearing, ermitti drawal of said iiferentia axial movement of the sha sections; and worm gearin carried b and connecting said driving s aft and sai diierential gearmg and meshing in the aforesaid plane.

27. A driving axle structure comprising the combination of a casing; s aft sections rotatably mounted in said casing; a cage detaehably mounted in the casing, said ca having a lateral extension; co-axial sha bearings carried by said extension, with their axis transverse to-and laterall oEset from the axis of the casing, one ofsaid shaft bearings being located on each side of the plane which contains the axis of the easin and is perpendicular to the axis of sai shaft bearings; a driving shaft carried in said shaft bearings and extending across said plane; differential gearin mounted in said cage; drivin connections tween said shaft sections an said differential gearin ermitting transverse withdrawal of the di erential earing without axial movement of the sha sections; and worm gearing earried by and connecting said driving shaft and said differential gearing and meshlng in the aforesaid plane.

transverse withearm'g without 28. A driving axle structure, com rising l the combination of an axle housing aving a lateral o ening therein; a cap normall closing sai opening; driven shaft sections rotatably mounted in said axle housing; and a differential driving unit for driving said shaft sections, comprising a cage, a driving said dier-A shaft journaled therein, a driving worm carried by said shaft and a worm gear meshing with said Worm and having driving connections with said shaft sections, ermittin transverse withdrawal of `said ierentia driving unit without axial movement of the shaft sections, the said differential driving unitbeing removably sup orted within said axle housing independent y of said cap and being removable bodily through the opening closed by said cap.

29. A driving axle structure, comprising the combination of a casing and a dlii'erential drivin unit mounted therein and removable t erefrom without disconnecting said axle structure from the vehicle frame, said unit comprising a cage detachably mounted in the casing, said cage having a lateral extension; sha t bearings carried by said extensions with their axis transverse to and laterally offset from the axis of the casing; a driving shaft carried in said shaft bearings and extending across the planewhich contains the axis of the casing and is perpendicular to the axis of said shaft bearings; a differential gearing mounted in said cage; and worm carin carried by and connecting said driving s aft and said dif ferential gearin and meshing in the afore` said plane, sais? plura ity of parts separable in a plane containing the axis of said diierential gearing. 30. A driving axle structure, comprising the combination of a casing and a differential driving unit mounted therein and removable therefrom without disconnecting saidaxle structure from the vehicle frame, said unit comprising a cage* detachably mounted in the casin said cage; having a lateral extension; sha t bearings carried by said extension with their axis transverse to and laterally oiset from the axis of the casing; a driving shaft carried in said shaft bearings and extending across the plane which contains the axis of the casing and lis perpendicular to the .axis of said shaft bearings; a diderential lgearing mounted in said cage and provided with axially extending hubs, said ca e includin se arable mating members em racing sai hu s; and worm gearing carried by and connectin said. driving shaft and said di'erentia gead'ln 31. driving axle structure, com rising the combinationof a casing; a cage etachably mounted in the casing, said cage having a lateral extension; shaft bearings carried by said extension, with their axis transverse to and laterally oiset from the axis of the` casing; a drivin shaft carried in said shaft bearings an extending across the `plane which contains the axis of the casin and is perpendicular to the axis of said aft bearin said casing comprising a plurality of parte adapted to be drawn cage being made up of a together to position said shaft bearings; di erential gearing mounted in said cage; and Worm gearin carried by and connecting said,dr1ving s aft and said differential gearing and meshi in the aforesaid plane.

32. A driving ax e structure, comprising the combination of a'casin a ca e detachably mounted in the casing, sai cage having a lateral extension; shaft bearin carried by said extension, with their axls transverse to and laterally offset from the axis of the casing; a driving shaft carried in said shaft bearings and extending across the plane which contains the axis of the casing and is perpendicular to the axis of said shaft bearings; dierential gearing mounted in said cage; a worm gear carried by said differential caring; a worm s lined on said driving sha and meshing Wit said worm ear.

33. driving axle structure, comprising the combination of a casing; a cage detachably mounted in the casing, said cage having a lateral extension; shaft bearings carried by said extension, with their axis transverse to and laterally oil'set from the axis of the casing; a drivin shaft carried in said shaft bearings an extending across the plane which contains the axis of the casing and is perpendicular-to the axis of said shaft bearings; diiferential gearin mounted in said ca e; a worm gear carried by said dii'erentia` gearin and a worm sllalined on said driving sha t ereon end for end and meshing with said worm gear. y

In witness whereof I hereunto -set my hand this 3d day of Jul 1917.

THOMA J. LINDSAY. Witnesses:

LOUISE BENNETT, G. B. Sommr.

and reversible i It is hereby certified that in Reissue Letters Patent No. 14,398, granted November i 27, 1917, upon the epplication of Thomas J. Lindsay, 0f Indianapolis, indiana, for

un im revement in "Worm-Drive Axle Structures an error e. ears in the rinted P i P specification requiring Correction as follows: Page 1, line 89, for the word "drivenf" read driving; and that the Said Letters Patent should be read with this Correction therein that the same may mnform te the record of the case in the Patent Office.

Signed and sealed this 29th day of January, A. D., 1918.

[sELAJ R. F. WHITEHEAD,

Acting omssz'oner of Patents. C1. 'f4-99.

Correction in Reissue Letters Patent No. 14,398.

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