US725991A - Reversing mechanism. - Google Patents

Description

, PAT-ENTBD APR. 21.1903. L. E. ROBINSON. RBVERSING `MLCHANISM. APPLICATION IFLEDJUNE 12, 1902.

z SHEETS-SHEET 1.

1K0 MODEL.

No. 725,991. PATBNTBD APR, 21, 1,903.y

" f L. E. ROBINSON.

RBVERSING MECHANISM.

I APPLICATION FILED JUNE 12, 1902. n

'N0 MODEL.' I 2 SHEETS-SHEET 2.l

' NITED STATES 'lATitivT ERICE.

LAwRENoE E. ROBINSON, on BUTLER, PENNSYLVANIA, AssIeNoR oF `oNE- FOURTH To P. E. DAUEENsPEcK,oE BUTLER, 1 ENNsYLvAN1A- R'VERSING. MECHANISM.

rsPEcIFcA'rIoN ferming part of Letters Eaten@ No. 725,991, dated April' 21, 1 903.

Appiieationfued June 12, 1902'.

To all whom zit may concern.:

Be it known that I, LAWRENCE AEgRoBIN- SON, a citizen of the United States, residing aty Butler, in the county of Butler 'and State of 5 Pennsylvania, have invented certain new and useful Improvements in Reversing Mechan-` ism, of which the following is a specificati'on, reference being had therein to the accompa-ly nying drawings. This invention relates to reversible clutchpulleys, and more particularly to certain img; provements in the pulleymechanism patented to me August 27, 1901,No. 681',511,'where; by the same is simplified, renderedmore effect-g 15 ive, and adapted to a Wider range of'use than@l heretofore. f 'j l The inventionv consistsin .thegnovel Vst r11cE tural features and combination of parts here-gy inafter fully described and claimed, and illusfy 2o trated bythe accompanying drawings, where- Figure 1 is a vertical longitudinal sectionall view of reversible clutch-pulley mechanism constructedin accordance with my invention. 25 Fig. 2 is a cross-sectional View on line 2 2 of Fig. 1. Fig. 3 is a sectional view of a portion of the pulley on an enlarged scale. Figs. 4 and 5 are views similar to Fig. 1, `illustrating different adaptations of the invention.

natos the shaft, and securedthereto is elongated bushing 3. v[oosely mountedion this bushing is pulley 4, constructed"withfelor 1 35 gated hub 5. Rotatable'onthe extended por-y tion of hub 5 is the wheellike head' or member 6, a ud projecting from 'one face' fof this head are the diametrically opposite h'ollow studs 7, while the opposite face ofthe head'is-l 4o formed with annular flange 8, tapering or V tom support 14, as in Figs. 1, 2, and 5, or may Referringfto the drawings, and more particularly to Figs. 1, 2, and 3 thereof, 2 desig- Serial 110.111.4045. (No model.)

be suspended from a hanger 14', Fig; 4, dependent Yon the elevation or use of the shafting. j .l

Movable longitudinally iu hollow studs 7 55 ,are stems 15;'ca`r'ryin'g at one end the disk-like heads 16, located between wheel 11 and the outer faces of gears 10. Stems 15 project through head 6 and are slotted at 1 7 to pass e levers 18"which are pivoted at their outer 6o ends at ears 19 on said head. The inner ends of theseleversare bifurcated at 1 8",V and pivfthe oppositel'y-beveled ring 23, mounted ou 'sleeve24adaptedfto slide on pulley-hub 5, 'being connected through 'the pulley-web by `rods25 to shifting collar 26, to which any suitable form of throwing-lever or other actuat- 7o ing mechanism (not shown) may be attached.

Carried by short arms 20 of levers 2l are adjustable screws 20', which bear against the face of head 6, and similar screws 15' in the extremities of stems 15 form adjustable bear- 75 ing-points for levers 18.

27 represents curved levers fulcrumed near their outer ends at 28 to ears 19 and at said lendsjcarry screws 29, which form adjustable bearing -j points for engaging the annular 8o shoulder 12', formed on the inner periphery `fof head 12 and faced with the thin bearingring The free ends of 'curved levers 27 extendfi'nward in tofthe path of bevel b of 'is'ZS- Q 'i In'operation with theclutching mechanism in neutraljpos'ition (shown in Fig. 1)'the pulley is loose, being unconnected for positive rotation in' either direction. y When the pulley is tol rotate with orin the same direction 9o as the shaft, beveled ring 23 is moved inward oitoward head 6 intovengagement with leversv21, forcing the outer extremities of the latter outward radially and short arms 2O in'- ward, with screws 20' bearing against head 6, 95 with the result that fulcrum-points 21-l ofthe leversare forced outwardoraway fromhead 6, moving therewith links 18', which in turn pull outward on stems 15 and cause heads or disks 16 to engage gears 10 and draw the latico ter so tightly against head 6 as to hold them against rotation. Thus a rigid connection is formed between the shaft and pulley through the medium of shaft-driven gear 11, non-rotating gears 10, and gear 9, the latter being fixed on the pulley-hub. In this adjustment it will of course be understood that head 6 turns with the shaft and pulley.

To drive the pulley reversely to the shaft, bevel-ring 23 is drawn outward or away from head 6, forcing outward levers 27, and bearing-screws 29, serving as adjustable fulcrumpoints, head 6 is drawn toward non-rotating ring 12, with V-shaped liange 8, tightly fitting corresponding groove 13 of the ring, thereby securing head 6 against rotation. In this adjustment, however, gears 10 are free to rotate 0n studs '7, and hence the motion transmitted therethrough to gear 9, rigid with the pulley, is the reverse of that of shaft 2 and driving-gear 11.

The periphery of gear-wheel l1 may be surfaced or crowned, as shown, to receive a belt for driving the same, in which case shaft 2 serves simply as a bearing or axial support for the clutch mechanism.

In the adaptation of the invention shown in Fig. 4 the reversing mechanism is shown applied to the shaft 2 for driving the same in either direction instead of driving a pulley, as in Fig. 1. Gear 11 is loose on shaft 2 and has ils periphery crowned to receive a belt extending from a drive-shaft. The pulleyhub of Fig. 1 being absent, the mechanism is mou nted directly on the shaft, though a bushing like that shown in Fig. 1 may be provided. The mechanism and means for adjusting the same for either motion are identical with those above described, save that shifting collar 3l is secured directly to sleeve 24, carrying bevel-ring 23.

In the adaptation shown in Fig. 5 the pulley of Fig. 1 is omitted, the mechanism being applied directly to the shafting, much as in Fig. 4; but in this embodiment of the in- Vention the mechanism serves as a means for coupling an auxiliary shaft 32 with the driveshaft 2 in such manner that the latter may be driven in either direction. The driven shaft 32 corresponds with pulley-hub 5 of Fig. 1 and has the reversing mechanism mounted thereon and gear 9 secured thereto in the same manner. In the one instance a pulley is driven, in the other a shaft. A removable key 33 unites gear 11 and shaft 2, which may be removed when power is applied through a belt on the periphery of wheel l1, in which case shaft 2 serves simply as a journal or axis for said wheel. The driven shaft may be larger or smaller than the drive-shaft and may represent counter-shafting, shafting for cranes and other machinery, the propellershaft of a boat, and, in fact, shafting for any and all purposes requiring a positive drive and a quick and sure reverse.

Obviouslymyimproved mechanism maybe employed for many uses wherein reversals of motion are desired, the embodiment of Fig. 1 being designed especially for pulley driving, while that shown in Figs. 4 and 5 is for shafts without the intel-position of a pulley.

I claim- 1. The combination of independently-rotative driving and driven gears, an independently-rotative head, gears rotatively mounted on the head between and meshing with the first-named gears, means for holding said interposed gears against individual rotation, a non-rotating device, levers fulcrumed to the said head and adapted to engage the non-1'0- tating device, and means for actuating the levers, substantially as described.

2. The combination of independently-rotative driving and driven gears, an independently-rotative head, gears rotatively mounted on the head between and meshing with the first-named gears, means for holding said interposed gears against individual rotation, a non-rotating device having an annular bearing-surface, levers fulcrumed on the rotative head and adapted to overhang and frictionally engage said bearing-surface, and means for actuating the levers, substantially as described.

3. The combination of independently-rotative driving and driven gears, rotative head G, gears 10 rotatively mounted on the head between the first-named gears, devices for holding gears 10 against individual rotation, levers 18 fulcrumed to head 6 and operatively engaging said devices, angular levers 2l bearing against head 6 and pivoted to levers 18, and means for actuating levers 21, substantially as described.

4. The combination of independently-rotative driving and driven gears, rotative head 6, gears 10 rotatively mounted on the head between the first-named gears, fixed head 12, means including levers 2l for holding gears 10 against individual rotation, means including levers 27 for securing head 6 to head 12, and actuating mechanism common to levers 21 and 27, substantially as described.

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

LAWRENCE E. ROBINSON.

Witnesses:

ALBERT L. BoWsER, JAMES MCLAUGHLIN.

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