US1276281A - Hoist. - Google Patents

Description

E. STOUT.

HOIST.

APPUCATION FILED 050231911.

Patented Aug. 20, 1918.

2 SHEETS-SHEET 1- um/430% I E. STOUT.

HOIST.

APPLICATION FILED 050.21. 19:1.

1,276,281. I Patented Aug. 20, 1918.

2 SHEETS-SHEET 2.

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f HOIST.

Specification of Iietters Patent. Y

Patented Aug. 20, 1918.

Application filed December 27, 1917. Serial m5. 209,063.

To all whom it may concern: a v

Be it known that :I, EDWARD STOUT, a citizen of the United States,:residing at Brightomin the county of Washington and State of Iowa,.have invented certainnew and useful Improvements in Hoists; and I do declare the followin to be a full, clear, andexact description '0 theinvention, such as will enable-others skilled 'in theart to which it appertains to make and use the same.

-My invention has for its object to provide a simple and:inexpensive yet a highly eflicient and durable machine for operating the two cables or ropes used upon hay forks 1n stowing the hay into the mow, the construction bGIIIg'SHCh as to require one person only to unload the hay from thewagon' and vdeposit it in-the mow. I

. With the foregoing general object in view,

the invention resides in the novel features of construction and uniq'ue combinations of parts to be hereinafter fully described and claimed, the descriptive matter being sup-- plemented bythe accompanying, drawings which form a part-of this spec' cation and. inwhichz .l

Figure 1 is a side elevation of the machine; I

Fig. 2 isa top plan .view

Fig. 3 is acentral longitudinal section on the plane of the line 33 of Fig. 2'; and

Fig. 4 is a perspective view-'showing'more particularly one of the friction brakes for,

checking the unwinding movement of the In the drawings above briefly described, the numeral 1 designates a suitably mounted frame including a base 2, four vertical posts 3, and a pair of parallel horizontal bars 4 extending longitudinally of the frame and supported at their ends by said posts. A drive shaft 5 extends between the two bars 4 and passes through openings therein, one

end of said shaft having a pulley or'the like 6 by means of which it may be driven, while a friction driving wheel 7 is secured on the other endof said shaft. Parallel links 8 are pivoted to and rise-from the bars 4, the

upper ends of said linksbeing pivoted to a pair of longitudinal bars 9 which carry a, drum. 10. and an auxiliary;

main windin drum 10, sai drum 10 having a relatively large friction wheel 11 for contact with the, driving wheel 7,. while drum 16 is equipped.

with a somewhat smaller frictionwheel 11' for engagement with said driving wheel.

.A main pull rope 12 is woundon the drum'lO and leads to the hay fork inthe usual manner, for raising and lowering this fork and pulling'its carriage along the common overhead track. 'An auxiliary pull rope ortrip cable 12 is wound upondrum 110 and this cable serves to. trip the fork after it has beendrawn to the desired point, and

then, acts to return. the fork to the outer end of the track. When either drum is in operatlonito wind its respective rope, the other drum is free tounwind, but :in order to preventpossibletangling10f the ropes, a pair of frictio'n brake shoesv 13 are provided, these shoes cotiperatingwith the friction wheels 11 andll and being carried on the upperends of vertical arms 14, which are pivoted to longitudinalbars 15, said last named bars having their ends bent upwardly to form hangerslo' which are secured to the -bars9.' Links 16 connect theupper ends of the 1 arms 14 with the arms 17 of arched brake operating members 18, the crown bars of saidjmembers 18 being preferably formed of rollers 19, for engagement with the cables 12 and 12 By thismeans, the brake of either drumwill be applied when the cable is being unwound. from such drum, to prevent the cable from payingout too rapidly and possibly becoming tangled, spring's20 a being connected to the arms 17 for so applying the brakes the moment the cable is slack. As soon as theicable is placed under load, however, the member lS isso moved as to release the brake to permit winding of said cableas will be clear from the drawings.

Coiled springs21 connect one end of the bars 9 -with the .posts'3 atone end'of the frame. 1; for so moving said ,bars as to .bring the friction wheel 11 into contact ;with the driving wheel 7 whereby to rotate the drum 10 to wind its cable at 12*. For

shifting the bars 9 in the opposite direction to operatively engagethe, friction wheel 11 with the driving wheel 7, a lever 22 is provided, said lever being operatively connected with the bars .9 bya rock shaft 23 upon whichsaid lever, is mounted, crank arms 24 extending from said rock .shaft, and links 25 pivoted to said crank arms and to the bars 9Q An operating rope or the like 26 extends from the upper end of lever 22 and is adapted to beactuated by a person wall 29 and with aninclined wall which merges into its bottom. When dog 28 slowly approaches the notch, 1t drops into thesame'and its end28 abuts the wall 29 and thus holds the lever in a neutral p0sition, but when a quick pull is exerted upon therope 26, and this rope is then quickly released, the dog 28 is raised from the notch by the inclined wall 30 thereof and the action of the springs 21 then moves lever 22% quickly as to" cause the dog to ump the notch, thus permitting said springs'to move the bars 9 to position the wheel 11 againstthe driving wheel 7. The end28' ofthe dog 28 is beveled and when moving rapidly it will not lodge againstthe wall 29. The device is installed at any suitable point and the ropesor cables 12 and 12 of' the hay, fork are secured to their respective drums. Shaft 5 may now be driven by any suitable means and the control cable 26 is positioned within easy reach of the driver of'the hay wagon. By operating this cable in the proper manner, the fork maybe 10wered and slow release of the cable will then cause the lever 22 to stop at a neutral position, due to the coaction of the dog 28 with the notch of the sector 27 The fork may now be forced into the hayand cable 26 is .tlienpulled so that the bars 9 are moved to engage the friction wheel 11 of the main drum 10 with the driven friction wheel 7, the result being that the main rope 12 is brought'into play to raise the loaded fork and draw it along the track to the required point, placingjof this cable under load serving to automatically release the braking means of the drum 10'as will be clear from Figs. 1 and 3.

At the same time, however, since the cable 12 is slackened, the braking means of drum 10 will be automatically applied to prevent this cable from unwinding too rapidly. When the loaded fork has reached the required point, the cable 26 is quickly released withthe result that the springs 21 shift the bars 9 to engage the friction Wheel 11? with the wheel 7, at the same time releasing the brake of drum 10 and applying that ofdrum 10. The trip cable 12 is now wound andthe maincable 12 paid out so that the load is dumped and the fork returned-to the Wagon. Upon release of cable 26 as set forth, the movement of lever 22 under action of the spring21 is so rapid, as to cause the dogj 28 to jump thanotch of the sector 27.

From the foregolng, taken in connection with'th'e accompanying drawings, it will be obvious that I have provided a simple and inexpensive machine for the purpose set forth, yet one which will be highly efficient an'dwill require the attention of only one person. Since probably the best results are obtained from the several details shown and described, these details are preferably employed, but I wish it understood that within the scope of the invention as claimed, numerous minor changes may well be made. Iclaim: 1. A machine of the class described comprising a main drum and a main pull-rope wound thereon, an auxiliary drum and an auxiliary pull rope secured thereto,r;means for driving either drum andsimultaneously releasing the'other drum tofpermitits rope to unwind, controlling. meansfor saiddrivingmeans including an operating member leading toa point remotefromthe machine,

independent self-appliedbraking means for the two drums, andmeansoperatedibytightening of'ei-ther ropewhenplaced under load for releasing the 'brakingimeans' of its respective drum. Y 2. A machine' of the' class described comprising 'a pairof parallel horizontal supporting bars, a drive shaft extending between said bars and having on one end a friction-driving wheel, a pair ofadditionalbars spaced vertically from said supporting bars, parallel links connecting the two" pairs of bars and pivoted *to both, a pair of winding drums extending between" said additional bars on opposite sidesof sai'd drive shaft and having friction wheels for contact with said friction driving wheel, spring means for moving said additional bars in one direction to engage the friction wheel of one drum with said driving'wheel, and

manually operated means for moving said addltlon'al'bars in the other direction'to-position the frictionwheel of'theother drum against saiddrive'wheel. v v

3. A machine of the class described"comprising a pair of parallel Winding drums each having a friction wheel, ropes wound on said drums, a friction driving wheelbetween said first named wheels, carrying means for said drums, means for shifting" said carrying means to engagethe friction wheel of either drum with said driving wheel, apair of bars spaced from and secured to said carrying-means, arms pivoted to said-bars and having brake shoes for engagement with the friction wheels of said drums, arched brake operating members having the free ends oftheir arms pivoted to sa1d carryingmeanatlinks connecting said first named arms and the arms'of said arched members, and springs for moving sa1d members to apply said brake shoes, the crown bars of said 'archedmember's'being disposed for' engagement with the ropes of saiddrums to h'oldthe brake shoes of'either drum released when the rope of such drum.

is under load.

4. A machine of the class described, comprising a pair of parallel winding drums each having at one end a friction wheel, a friction driving wheel between said first named Wheels, carrying means for said drums, spring means for moving said carryingmeans in one direction to engage the friction wheel of one drum with said driving wheel, a lever operatively connected with said carrying means formoving the latter in the opposite direction to engage the friction wheel of the other drum with said driving Wheel, a sector adjacent said lever and Copies of this patent may be obtained for five cents each, by addressing the commissioner of Patents. I

having a notch formed with an abrupt wall and an inclined wall, a spring pressed dog on said lever adapted to engage said abrupt wall to hold said carrying means in a neutral position [against the tension of said spring means, and an operating member connected to said lever and extending to a remote point.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses. s

' r EDWARD STOUT. Witnesses: IVA SINN,

H. F. TRACY.

Washington, D. 0. o

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