US1165915A

US1165915A - Differential gear.

Info

Publication number: US1165915A
Application number: US1729015A
Authority: US
Inventors: Thomas H Sparks
Original assignee: Individual
Current assignee: Individual
Priority date: 1915-03-26
Filing date: 1915-03-26
Publication date: 1915-12-28
Anticipated expiration: 1932-12-28

Description

DIFFERENTIAL GEAR.

APPLICATION man MAR. 26, 1915.

Patented Dec. 28, 1915.

3 SHEETS-SHEET 1.

T. H. SPARKS.

DIFFERENTIAL GEAR.

APPLICATION FILED MAR. 26. 7915.

Patented Dec. 28, 1915.

3 SHEETS-SHEET 2.

s snaars-smm 3.

Patented Baa. 28

T. H. SPARKS.

DlFFERENTIAL GEAR APPLICAHON man MAR. 26. I915.

CHE-ulna warren STATES Parana onnicn.

THOMAS H. SPARKS, OF WICHITA, KANSAS.

DIFFERENTIAL GEAR.

Application filed March 26, 1915.

To all whom it may concern Be it known that I, Trrouas H. SPARKS, a citizen of the United States, residing at \Vichita, in the county of Sedgwick and State of Kansas, have invented certain new and useful Improvements in Differential Gears; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the'same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

This invention relates to new and useful improvements in transmission gears for engines and the object in view is to produce an apparatus of this nature so constructed as to provide for varying speeds with varying degrees of power.

The invention consists further in the provision of an emergency t'ansmission gear whereby the pulling power of the engine may be increased over the apparatus being driven.

The invention consists further in the provision of a transmission gear in which the engine is relieved of extra strain under an increased load.

The invention comprises various other details of construction, combinations and arrangements ofparts which will be hereinafter fully described, shown in the accompanying. drawings and then specifically defined in the appended claims.

My invention is illustrated in the accompanying drawings, in which:

Figure 1 is a central transverse sectional view through the transmission gear apparatus. Fig. 2 is a vertical sectional view through the mechanism shown in Fig. 1. Fig. 3 is an enlarged detail sectional view showing the means for locking the parts to rotate together. through the shaft showing in elevation a means for locking one of the gear bands to the casing. Fig. 5 is a top plan view with a part of the casing removed, and Fig. 6 is a detail sectional view of a modified form of a part of the invention.

Reference now being had to the details of the drawings by numeral, 1 designates a suitable housing of the transmission in which bearings 2 are mounted in a suitable housing 3, and 4 and 5 designate stub axles upon Specification of Letters Patent.

Fig. 4 is a sectional View.

Patented Dec. 28, 1915.

Serial No. 17,290.

which the driven wheels of the apparatus are adapted to be mounted. Mounted loosely upon the .two axles are the two similar casings 6 and 7 and the marginal edge of the flange of each casing is provided with recesses forming, when the two parts are fastened together, apertures for the reception of the stub shaft 8, there being four of said shafts, as shown clearly in Fig. 2 of the drawings, said stub shafts being mount ed n radial apertures in a disk 9 which has cyl pdrlcal recesses in its opposite faces in which the inner ends of the axles 1 and 5 have bearings. The outer end of each stub shaft 8 is mounted in recesses in the outer marginal edge of the shell of the casing sections 6 and 7 Upon reference to Fig. 2 of the drawings, it will be noted that each of the sections 6 and 7 has oppositely disposed recesses 10 in which the beveled gear wheels 11, which are journaled upon the stub shafts 8, are positioned. Fixed to the axles at and 5 are the

beveled gear wheels

12 and 13 which are in mesh with a pinion 1-1 which is loosely mounted upon the stub shaft 8. 15 designates a gear band,the marginal edge of the opening therein having a bearing upon a' shoulder 16 of the casing section (3. and ball bearings 17 are inounted in suitable raceways formed in the adjacent faces of the gear band 15 and a disk 18. A driving shaft, designated by numeral 15". has fixed thereto a beveled gear 15 which is in mesh with the teeth of the gear band 15. A second gear band, designated by numeral 19. has a. central opening. the marginal edge of which fits over and has a hearing about a shoulder- 20 upon the casing section 7. and the teeth upon the two

axle sections

15 and 19 are in mesh with the beveled gear 11 which is loosely mounted upon the stub shaft 8. Said gear band 19 has a raceway upon its outer face and cooperates with a similar raceway formed in the inner face of a disk 21 to receive the balls Bolts, designated by numeral 23, pass through registering apertures in the disk 18. the two casing sections 6 and 7 and the disk "21 and hold the same securely together. The circumteronce of the gear band 19 is provided with slots or recesses 9% at intervals. and designates a spider disk having lingers 2t thereon which. when the disk is driven to its farthest inner throw, are adapted to engage said slots or recesses :24. It will be noted that the interior surface of the housing is provided with grooves 26 in which said fingers 26 are mounted and in which they have a play as the disk is moved toward or away from the differential. By this construction, when the fingers are thrown into engagement with the slots of the ear band 19, a rigid means will be afforded or holding said band locked to the housing. A yoke 27 has connection through the pivots 28 with said spider disk at points diametrically opposite, said yoke having integral therewith a hollow c lindrical portion 29 for the reception 0 the rod 30 which is adapted to be rocked by any suitable lever-actuated mechanism, not shown, within convenient reach of the operator.

Upon reference to Fig. 3 of the drawings will be noted. a locking bolt, designated by numeral 31, having an offset or head 32 at one end, there being shown in the drawings four of said bolts, each movable through registering apertures in the disk 18, casing sections 6 and 7 and in disk 21 and the ends of said bolts project beyond the outer face of the disk 21 and each is recessed with the threaded wall for the reception of a screw 34 which passes through an aperture in a disk 35, having a boss 36 around the central opening 37 therein, and 38 is a. disk which is fastened to the outer end of said boss, leaving a space intervening between the same and the disk 35 for the reception of the spider disk 25. Screws, designated by numeral 39, one of which is shown in Fig. 1, pass through registering apertures in the disks 38 and 35 and the inner end of one screw projects beyond the inner face of the disk 35 and over which a coiled spring 10 is held, which passes through an aperture in the disk 21 and its inner end is seated in a recess formed in the casing section 7, the purpose of said s rings being to normally hold the bolts 31 1n the positions shown in Fig. 3 of the drawings, in which the disk 18 and gear band 15 are locked securely together.

Referring to Fig. 6 of the drawings, I have shown a slight modification of a part of the invention in which, instead of the beveled gear 15 as shown in Fig. 1 of the drawings, I provide a driving shaft 12 having a worm 43 thereon which is in mesh with worm teeth 11 formed upon the gear band 45 which in other respects is similar to the gear band 15.

In operation, when the parts are assembled as shown in Fig. 1 and locked together by means of the headed bolts, a detail of one of which is shown in Fig. 3,. the various parts within the housing will, with the exception of the spider disk and shifting arm 31 connected thereto, rotate together when power is applied through the medium of the engine shaft 15*. When the apparatus,

der 16 of the casing. Immediately after the bolts are released from their engaging relation shown in Fig. 3, the spider disk, which is also moving with the bolts, will be so positioned that the fingers 26 thereon will engage the recesses 21 formed in the marginal edge of the gear band 19, thus locking the latter, through the medium of the spider disk, to the housing. When the parts are adjusted in these positions, a rotary movement imparted through the medium of the driving shaft 15 will cause the gear band 15 to rotate independent of the disk 18 and the casings 6 and 7. Motion is imparted from the gear band 15 to the gear wheel 11 which is in mesh with the gear band 19.

It will be understood that, as the gear band 19 is locked to the housing, it will require twice the revolution of the gear band 15 to be made to one of the casing sections 6 and 7 which carry the axles rotating therewith. This operation of the apparatus will divide the strain between the engine and the housing, thus relieving the engine of substantially half the pulling strain of the car. When the parts are in adjusted positions, various speeds may be had through the usual transmission mechanism, not shown, and, when the parts are thus adjusted, all speeds found in the regular transmission are duplicated at half .speed with increased power of the engine. when operated in this way, the engine is required to stand only half the pulling strain at any speed had in the regular transmission.

What I claim to be new is 1. In combination with a differential and easing therefor, a housing about the casing, gear bands mounted to rotate loosely about the casing, gear connections between the bands, means for locking one band to the housing, and gear mechanism for driving the other band.

2. In combination with a differential and casing therefor, a housing about the casing, gear bands mounted to rotate loosely about the casing, gear connections between the hands, a spider disk mounted upon the housing and adapted to engage and lock one of the gear bands to the housing, and gear mechanism for driving the other band.

3. In combination with a differential and gear bands mounted to rotate loosely about the casing, gear connections between the bands, one of said bands having recesses formed therein, a spider disk carried by the housing and having fingers adapted to engage the recessed band to lock the latter to the housing, and gear mechanism for driving the other band.

4. In combination with a differential and easing therefor, a housing about the casing, gear bands mounted to rotate loosely about the casing, gear connections between said bands and means for causing the bands to rotate with the casing.

5. In combination with a differential and easing therefor, a housing about the casing, gear bands mounted to rotate loosely about the, casing, gear connections between said bands. disks fastened to said casing, ball bearings between said bands and disks, bolts passing through said disks and casing and adapted to hold one of said bands from rotation independent of the casing, and gear mechanism for driving the band thus locked.

6. In combination with a differential and easing therefor, a housing about the casing, gear bands mounted to rotate loosely about 'the casing, gear connections between said bands, disks fastened to said casin ball bearings between said bands and disks, bolts passing through said disks and casing and adapted to hold one of said bands from rotation independent of the casing, gear mechanism for driving the band thus locked, means for releasing the bolts, and mechanism for locking the other of the bands to the housing.

7. In combination with a differential and easing therefor, a housing about the casing, gear bands mounted to rotate loosely about the casing. disks fastened to said casing, ball bearings between said bands and disks, bolts passing through said disks and casing and adapted to hold one of said bands from rotation independent of the casing, gear in'ech-' adapted to hold one of said bands from rotation independent of the casing, gear mechanism for driving the band thus looked, a spider disk having fingers for engagement with recesses formed in one of said bands, a yoke fastened to the spider disk, and a shaft for moving said yoke.

9. In combination with a differential and casing therefor, a housing about the casing, gear bands mounted to rotate loosely about the casing, gear connections between said bands, disks fastened to said casing, ball bearings between said bands and disks, headed bolts passing through registering apertures in the disks and casing sections, one of said disks having openings through which the bolt heads move, the adjacent gear band being recessed for the reception of the heads of the bolts, a disk to which the ends of the bolts are fastened and provided with a boss, a diskfixed to said boss, a spider disk interposed between the disks which are fastened to said bolts and boss and having fingers for engagement with recesses in one of said gear bands, springs for normally holding the heac'fs of the bolts in the recesses of said bands, and a yoke for moving said spider disk.

10. In combination with a differential and easing therefor, a housing about the casing, gear bands mounted to rotate loosely about the casing, gear connections between said bands, disks fastened to said casing, ball bearings between said bands and disks, headed bolts passing through registering apertures in the disks and casing sections, one of said disks having 0 enings through which the bolt heads move,the adjacent gear band being recessed'for the reception of the heads of the bolts, a. disk to which the ends of the bolts are fastened and provided with a boss, a disk fixed to said-boss, a spider disk interposed between the disks which are fastened together and having fingers for engagement with recesses in one of said gear bands, the inner surface of the housing having grooves for the reception of said fingers, springs for normally holding the heads of the bolts in the recesses of said bands, and a yoke for moving said spider disk.

In testimony whereof I hereunto afiix my signature in presence of two witnesses.

THOMAS H. SPARKS.

\Vitnesses A. L. Honor-r, FRANKLIN H. HOUGH.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

DISCLAIMER,

1,165,915.Th0mas H. Sparks, Wichita, Kans. DIFFERENTIAL GEAR. Patent dated December 28. 1915. Disclaimer filed July 23, 1925, by the assignee, Ruckstell Sales (6 Maw-ufaczuring Company.

Hereby enters the following disclaimer:

(a) To any combination of the recited BlQII'lOIltS of claims 1 to 10 inclusive of said Letters Patent. except as an auxiliary to the main or regular transmission and clutch mechanism of a motor vehicle for the purpose of doubling the various speeds of said main or regular transmission and increasing the driving power of the motor;

(b) To anycombination of the recited elements of claims 1 to 10 inclusive wherein the gear connections between the bands are not journalled on the (Iifierential casing;

(0) From claim 1, any means for locking one band to the housing other than a positive member performing the alternative function of also causing both bands to rotate with the casing;

(d) In claim 4, any means for causing the bands to rotate with the casing other than a shiftable member performing the alternative function of positively locking one band to the housing.

'[OflZm'aZ Gazette August I], 1925,]