US1144807A - Gearing. - Google Patents

Description

A. F, BRONNER & A. A. QUICK. GEARING.

APPLICATION FILED AUG. 16, 1911.

l 1 44,07. Patented June 29, 1915.

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ALFRED FREDERICK BRONNER', OF MELBOURNE, AND ALFRED ARTHUR QUIQK, NORTHOOTE, VICTORIA, AUSTRALIA. p

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Specificationof Letters Patent.

Patented June 29, 1915.

Application filed August 16, 1911. Serial No. 644,334.

To all whom it may concern Be it known that we, ALFR D FnnnnnIoK BnoNNnn, subject of the Emperor of Germany, and resident of 117 Collins street, Melbourne, and ALFRED Anrr run QUICK, subject of the King of Great Britain and Ireland, and resident of Barry street, Northcote, in the State ofVictoria, Commonwealth of Australia, have invented Improvements in Gearing, of which the following is a specification.

This invention relates to certain improvements in epicyclic speed reducing or speed multiplying gearing, embodying the use of an oscillating wheel which engages with a fixed wheel and a rotating wheel, the motion being transmitted through the said rotating wheel.

I The object of our invention is to provide means whereby the forces about the central point of oscillation are symmetrically balanced, thus virtually supporting the central point of oscillation independently of the driving shaft, and operating cam thereon, and relieving the high speed or driving shaft of the back thrust from the teeth. The effect of virtually supporting the central point of oscillation is to reduce the pressures on the journal bearings of the high speed or driving shaft.

This invention consists of certain improvements in gearing which comprises an oscillating wheel operated with a cam without shoulders or abutments so that the said oscillating wheel and the cam have mutual freedom of lateral movement, the said oscillating wheel engaging with a fixed wheel and a rotating wheel, the motion being transmitted through the said rotating wheel.

Our improvements in gearings of this desoription comprise the duplication of the inner series of engaging teeth of the oscillating wheel by the provision of an additional wheel engaging therewith. In a gearing constructed in accordance with this invention there are thus at least three series of teeth upon the oscillating wheel. The additional wheel referred to may be either aw fixed wheel or a rotating wheel as the case may be provided it insures the duplication of the inner series of teeth upon the oscillating wheel. The mutual pressure between the additional series of teeth afforded by the,

aforesaid duplication causes the forces act,- ing in the plane of rotation to be counterbalanced about the central' point of oscillation, and the high speed shaft is thereby'relieved of the pressures due to such forces and is virtually supported. i

. In order that our invention may be better understoodwe will now proceed to describe the same with reference to the accompanyingdrawing which is an elevation partly in section of agearing (applied to a winding drum or winch) inwhich the balancing of resultant pressure at the central point of 0s-,

cillation iseii'ected by the duplication of the inner engaging series ofteeth on the oscil- I latin'g wheel and the-fixed wheel.

The fixed frame A is in the nature of a pair ofbraclretsor standards. The driving shaft B passes through from side to side, having means at either end for the attachment of driving pulleys or cranks as the case may. be. Upon this driving shaft B is mounted a cam D shown in section carrying the oscillating wheel E. The cam D is formed without flanges or side projections to allow of the wheel E having free lateral movement to automatically adjust itself to its true working position upon the cam D. The wheel E is formed with duplicate series of teeth E E upon either side engaging fixed series of teeth F upon fixed wheels F which are attached to the brackets or stand ards A. The oscillating wheel E has a duplicate series of teeth E which gear with the series of teeth H upon the inside of a drum or barrel M which thus acts as a winch and rotates upon the bosses of the fixed wheels F. This drum or barrel M is adapted to form an oil box for the gearing. The before men tioned duplication of the series of teeth is arranged for the purpose of balancing the resultant pressure at the central point of oscillation, thereby virtually supporting the said central point of oscillation.

In operation the driving shaft B is actutoothed wheel E. The two duplicate series of teeth E are one more in number than the two duplicate series of fixed teeth F so that for each complete rotation of the cam D the tion of the cam D the saidos'cillating wheel steps forward in rotation to the extent of one tooth. The resultant rotating movement imparted to the drum M is thus ex pressed by well known formula applicable for such reverted epicyclic gearing pressures from the teeth H would be directly transmitted on to the high speed s shaft.

In practice the oscillating wheel and the cam are so made that the center ofgravity ofthe two combined coincides with the central point of oscillation, so that the balance attained as above set out is not subjected to any disturbance due to the force of gravity.

'We claimzs I r In epicyclic gearing, the combination of a fixed member, a rotatable driving member, a rotatable driven member, an oscillating wheel, a cylindrical cam arranged upon one of the said rotatable members at an oblique angle to its axis and having the oscillating wheel j ournaled thereon, the center of oscillation of said wheel being disposed inwardly with respect to'the ends of the cam, inner duplicate series of teeth provided upon both sides of the oscillating wheel and upon the fixed member at opposite sides of the said wheel to gear with each other, and an outer series of teeth provided upon the other rotatable'member and the oscillating wheel at one side of the latter to intermesh.

"In testimony whereof we afiix our signatures in presence of two witnesses.

ALFRED FREDERICK BRONNER. ALFRED ARTHUR QUICK.

Witnesses:

CLEMENT A. HACK, VERA CRUIoKsHANK.

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

Washington, D. 0.

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