US1017819A - Gearing. - Google Patents

Description

A. SUNDH. GEARING. APPLIoATIoN FILED SEPT. 5, 1911.

UNITED sTrim", EeaqlilNTOFFICE f AUGUST sUNDH, or HAsLrINGs-UroN-HUDSON, -NiavV Yonx, AssIGNoR 'ro ons ELE- VATOR COMPANY, JERSEY.

To all whom it may concern:

Beit known that I, AUGUSTFSUNDH, of H astngs-uponI-Iudson, county of Westchester. State of New York, have invented a new and useful Improvement in Gearing, of which the following isv a frh-clear, and exact description.

The object of the invention is to provide a new and improved yieldable, self-alining gear, whichis simple and compact in construction, and effectiveyin operation. y

The invention consists of certainparts, details and combinations of same as will be vfully described hereinafter and then pointed out in the claims.

Reference is to be had tothe accompany-v ing drawing forming'a partof the specification, in which similar lettersV of reference indicate corresponding'parts in all the tigures. y

Figure l is a side view of'a toothed gear with my invent-ion applied thereto. Fig. 2 is a front view of Fig. l. Fig. 3 is a sectional view, on line 3 3., Fig. 2. Fig.` 4 is a sectional view, onr line 44, Fig. 1. Fig. 5 is an end view of my invention applied to an internal toothed gear or annulus. Fig. 6 is a sectional view of my invention applied as a coupling. l

My improved gear is comprised of substantially three elements or parts, to wit:

an inner or central element, indicated by' reference letter A on the drawing, an outer element or part, indicated by the reference letter B on the drawing, which,

-outer element surrounds the inner element,

and an intermediate element C. The outer periphery of the inner element and the inner periphery of the outer element are corrugated or waved, the corrugations on the faces of the respective parts being substan tially of corresponding shape, so that the 'inner kpart or element-upon being rotated will impart its motion to the outer part 'or the outerpart being rotated will impart its `motion to the inner part.- The corrugations are transverse of the periphery of the vtwo elements, and there is a clearance-space left between the opposing faces of the parts, in

which thereis placed the third part or element, C. consisting of a strip or band ot"` metal. preferably steel, which strip may be of suicient thinness to be wound or-otherwise placed in the clearance space, in a single layer: or the clearance space between the Specification of Letters Patent.

Application led September 5, 1911. Serial Nol-647,464. A

row, Fig. 3.

A, will press against the strip,`C, substanoF JERSEY CITY, .NEW JERSEY, A CORPORATION 0.1.1` NEW GEABING.

Patented Feb.

parts, A and B, may be of sufficient dimenf sions to allow the strip of metal to bewound in the clearance space a number of times. I have indicated onthe drawing, seev Figs. 3 and 4, for instance, the strip, C, as being wound a number of layers between the parts, A and B. I preferably enlarge the clearance space, beginning at about the middle D of the corrugations of the parts, A and B, and flaring outwardly to the sides of those parts asA indicated by the reference letter, E. The flaring may bein one, or both ofthe parts, A and B. This lflaring feature practically amounts to a nearer approach of the parts, A and B, to each other at substantially a point, D, Figs. 3 and 4, included in a median line drawn around the circumferences of those two parts. Now,

by closely packing the strip between the two parts, A and B., at the point or points ,of their nearest approach, there is obtained, in effect, a pivotal point, about which there may be, and in some cases willbe, a slight pivotal or rocking movement of the parts, lA and' B, relatively to each other, thereby permitting theI gear to aline itself. This feature is carried out in the construction vofmy gear by having the apex of the corrugations at the median line, slightly closer to the opposing concavities or bottomsv than at the sides of the cprrugations in the parts, A and B, as

clearly shown in Fig. 3. I enlarge'thatpor-l tion ofthe clearance space between' the sides of the corrugations, by lessening the height ofthe shoulders of the corrugations, or by. increasing the depth' of the opp( )si11gcon` cavities or bottoms, as clearly shown in Fig.

3, at the locality F. This feature secures' a yielding relation betweenvthe parts, A and B, sincevit. allows ay relative movement between those parts. Further to explain;-v letit be rimagined that motion is imparted to the inner part A in the direction of the arrThe corrugat-ions on the part,

tially in the direction of the arrow, and by reason of the fact that thestrip, C, does not occupyall the space in that portion of-the vclearance space substantially opposed to the los.

H, Fig. 6, the application thereto being so y plain as not to require any further tentual description.

lflfhile I have shown the outer element. B, in Fig. i, as a toothed gear, it is plain that the part B might be shown as having a plain outer periphery instead of a toothed periphery, to be used as a friction or belt gear. t It is also plain that I might have shown the parts, and B, as having the corrugations extending from their lateral faces and engaging each/other. While I hare shown4 the corrugations rounded, it is plain that they may be of any suitable form.

rlhe part Alis shown in Figs. l, 2, 3, and 4, as keyed to a shaft, L and there is a face plate, A J, which is shown secured fast to the part B, with a slight clearance between the plate and the part A, and the shaft, I. It will be observed that the face plate serves to retain the part B in position with respect to thepart and this strip C between the parts A and B, and yet allows any relative movement by the parts A, B,

C, and I; i

` I am aware that it has been proposed to us'e rubber or springs between driving and driven parts; but they have not been arranged, so far as I am-aware, toallow the driven part to be self-alining without, at the same time, allowingthe axis of the driven part to be changed. This feature of aline-V ment is of course highly important in gears; it would appear that rubber or a spring cannot be successfully used for this purpose, because the center of the'axis of the gear must remain xed, whereas rubber Vor a spring will allow the center of the axis of the driven part of the gear to be changed under the strain of the application of power tc' it, both by the inner part of the yieldable gear, and the resistance offered by the gear to be driven by the outward part of the yieldable gear. I have successfully taken care ofthis objection to rubber or' a spring by using a metal strip'` closely packed in between the apex of the corrugations and the concave opposing surfaces, all of which I' vertheless, I have' ob have described. .tained a yieldable ear, as is obtained by the use of rubber or a spring, notwithstanding the fact that I use a metal strip. I obtain posing sides of the"corrugations, thereby l permittinga slight movement of the strip the yieldable feature by enlarging 'the op-.

irrigare and the added advantage over them of a self alining gear. lhiithei'niore, the strip is .g tempered and retains its original. di-

nsions and generally, l have found it to better than rubber or a spring or any 1. ng like them; and the gear will always herefore, aline itself perfectly.

(it course. various changes of the details might be made within the scope of my intention; I therefore wish not to be limited to the exact construction disclosed.

y lWhile I have disclosed my invention as comprising substantially three parts, it is obvious Jthat the invention comprises any number of parts greater than three, for instance, the inner and outer parts may consist of two parts or any number Agreater than two, and if those parts shall consist of any number greater than two, a band may be placed between two of the opposing parts a5 or between all of the opposing parts.

lll/'hat I claim as new, and desire to secure by Letters Patent of the United States, is

l. In a device of the class described, the combination of several parts or elements to be rotated, having corrugations, with a clearance space between the corrugations von one part and the corrugations on another part; and a strip or band of elastic material in the space. 95

2. In a device ofthe class described, the combination of several parts or elements to be rotated, having corrugations, Awith a clearance space between the corrugations on one part and the corrugations on another part; and al strip or band of steel in the space.4

3. Inra device of the class described, the combination of several parts or elements to be rotated, having corrugations, with a clearance space betweeny the corrugations on one part and the corrugations cn another part; the space being narrower at the median circumferential line of the two parts' than at the end circumferential lines of the said two parts; and a strip or band of material in the space and occupying all the narrow portion or part of the space; the part of the said strip in the 'narrower portion of the said space being unyielding to deformation. 115

4J In a device of the class described, the combination of. several ,parts or elements to be rotated, having' corrugations, with a clearance space between the corrugations on one part and thecorrugat-ions onanother 120 part; the space being narrower at the median circumferential line of the two parts than at the end circumferential lines of/the said two parts; and a' strip or band of steel in the space, and occupying all the narrow 125 portion of the saidV space.

' 5. Ina device of theclass described, the combination of'several parts or elements to. be rotated, vhaving corrugations, withA a clearance space between the corrugat-ions on .1.30

. space; that portion of the strip'in the nar.

one part and the corrugations on' another part;- the space being narrower Aat the median (':ircum'ferentia'l line of the two parts and flarin outward to the sides of the two parts; an `a strip of steelinthe clearance rower part of Vtlie space occupying all the space there; and that port-ion of the strip not in the narrow part of the clearance, not` occupfmg all .tle space, but being free to bev `faces of the parts being corrugated to correspond substantially, to each other, and the outer. face of the outer part having gear teeth; and a strip of steel in the clearance 7. A gear, comprising inner and outer parts, separated from each other, with a clearance space therebetween, the opposing faces being corrugated to 'correspond substantially to eachother; the clearance space being narrower at the median circumferen- '-tia .l hne of the ,saidftwo parts than at the sides of the latter; and a strip of steel fitted closely in the narrower portion ,of the clearance space.

8. A gear, comprising inner and outer par-ts, separated from each other, with a clearance space therebetween, the opposing faces being corrugated to' correspond substantially to each other; the clearance space being wider between the sides of th opposling corrugations than between the top of a corrugation on one of the said parts and the concavity opposite to the top in the other parts; and a strip or bandof'steel in the clearance space, not occupying allthe wider part of the said'space.

'9. A gear, comprising parts, separated from each other to form a clearance space; the outer; face 'of 'the outer part having gear teeth; the inner face of the outer part and the outer face ofthe inner part, being corrugated to'correspond substantially to each other; the clearance-space being narrower at-the median circumferen# tial line of the said two parts than at the vsides of the latter; and the clearance'space between the sides of opposing corrugations being wider than at the tops of the opposing corrugations; a strip of steel inthe clearance space, fitted closely between the outer' and inner parts along the median circumferential line, and more or-less loosely in the .space between the sides-of" the corrugations.

l0. In the class of article described, a yieldable, self-alinng geen/comprised substantially ofv an inner and'outer part, sep. arated from each other,` but arranged to engage each other; and a'strip of hard, elastic material placed between the said inner and outer parts. l v Y 11. In the class ofarticledescribed, a yieldable, self-alining gear, comprised sub-` stantially of an inner and outer part, separated from each other, but arranged to engage each other; and a stripof hard, elastic' material placed between the said IInner and uter parts, and a face-plate-'secured to th inner part. I

In testimonywhereof, I have signed my name to this specification in the presence of two subscribing witnesses.

AUGUST SUNDH. -Witnessesz WALTER C. mane;

inner and outer

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