US8717A - Horse-poweb - Google Patents

Description

\ nutren sTAfrnsrAT/ENT onrrcn M. H. CRNELL, OF FEASTERVILLE, PENNSYLVANIA.

` `Honsn-is'ovvnn.

speqincation of Letters Patentino. 8,717, dated February 1o, 1852.

`To all whom #may Concern.' Be it known that I, MARTIN H. CORNELL, of Feasterville, in the county of Bucks and State o-f Pennsylvania, have invented a new and `useful Improvement in Horse-Powers, of-which the following is afull,.clear, and exact description, reference being hadto the accompanying drawings, which` form part ofthis specification, and in which- Figure l represents a sideelevation and Fig. 2 an end elevation of myimproved self-regulating horse power. n

In horse powers as generally constructed no efficient means are provided forregulating `the speed; hence it frequently happens that when a portionof the machinery driven `is thrown out of gear the remainder vattains an inordinately` high `velocity from the increased speed of the horse, who, finding the load diminished, moves with greater speed. The object of my invention is to obviate this defect and it consists in the combination of a governor and friction brake in such l manner that as the speed increasesbeyo-nd its proper limit the brake is brought into action to increase the resistance `which the The several parts of my horse power as represented in the accompanying drawings are all secured to a strong bed frame A upon j which two side frames B B are mounted to support the moving platform C and the other parts of the mechanism. The platform is composed of an endless series of separate foot boards a, a, which are connected by links, which render it sufficiently j flexible to enable it to pass easily around supporting drums. This platform is mounted upon two horizontal polygonal drums D, D, whose journals are supported upon friction wheel e, e. One of these drums (D) is larger than the other, and they are arranged in such relative positions that the lower faces of theirbarrelshare at the same level, hence the upper portion of the plate form supported by them is inclined while its lower portion is horizontal. The upper and lower portions of the platform are supform is taken olf and transmitted by belts `or otherwise to the machinery to be driven.

The apparatus for regulating the speed is situated `inthis instance at the side of the machine; it consists of a` governor of peculiar form and of a friction brake. The friction brake consists of a. curved beam F which embraces a portion of the rim of one ofthe fly wheels Gr, and is linked at oneof itsV extremities to a standard d projected upward from the bed frame. AIts opposite extremity is linked to a radius bar f and is also connected by a link rod g with the extremity of alever beam H above. The opposite extremity z' of this lever beam j is forked to embrace a sleeve J which is` constructed to slide upon the spindle of a gov ernor K. `The governor is supported in an erect position by suitable boxes in which the journals of its spindle are inserted. Itis fitted with two fly balls j, j, whose rods are pivoted to the spindle. Above these `ball rods are a` pair of levers 7c,` le, which are pivoted near their centers to the spindle and turn with it; their upper extremities are formed into jaws Z, Z, which embrace the lower extremity of the sleeve J. The latter has a screw thread cut upon it and the lever jaws have corresponding threads upon their adjacent faces, so that when the threads of the lever jaws are engaged with that on the sleeve, and the governo-r is revolving while the sleeve is prevented from revolving by the pins which connect it with the forked extremity of 'the lever beam, the threads of the jaws acting upon those of the sleeve will act as a nut to draw the sleeve downward, thus depressing the forked extremity of the lever beam and raising its opposite extremity and the friction brake connected therewith. The governor is driven by a belt o-r cord m from the fly wheel shaft, and the belt pulleys n, 0, `are of such relative sizes that when the plat-form, in moving, does not exceed the sufficiently thrown out from the spindle to cause their rods to actuate the levers and force their jaws `to embrace the sleeve. Hence at such a speed the brake will remain at rest in its lowest position out of contact with the flywheel rim. If however the horse moves the platform beyond its proper speed the governor balls will diverge farther by reason of the increased speed imparted to the governor by the accelerated movement o-f the iy wheel shaft. As the balls diverge `1.00V proper speed, the governo-r balls will not be e' released from the sleeve, and the frictionV brake drops to its lowest position, thus relieving the machineinstantly of the extra resistance imposed upon it. In order to facilitate the action of the brake 'beam F it is lined with a spring bar which is fitted at its extremity with a friction roller 1. This addition prevents the too sudden action of the brake and renders the pressure gradual and uniform.

The horse power I have thus described is well adapted to obtain the maximum effect which a horse can exert, for the platform drums are large and the arrangement of the whole driving apparatus upon friction rollers reduces the friction of the machine to such a slight amount that an inappreciable fraction of the power exerted by the horse will put the whole in motion. It is peculiarly adapted to the driving of light machinery where an excess of speed would endanger the machinery driven; and the solidity of the machine is such that it is not liable tobreakage and consequently may be employed to drive the heaviest machinery to which itspower can be advantageously applied.

The machine represented in the accompanying drawing is constructed for a singlehorse but its dimensions may be increased to admit two or more horses as may be required. It is also obvious that the construction and arrangement of the governor and brake may be varied to suit particular cases or to meet the views of different construc tors. A second friction brake should be applied to o-ne o-f the fly wheels and should be connected with a hand lever by operating which the machine can, when required be quickly stoppedy by hand.

I-Iavingt-hus described'my improved horse power what I claim therein as especially ,new and for which I solicit Letters Patent- The method of regulating the motion by means of a brake worked by a governor constructed substantially as herein described so as to operate the brake with a force which increases with the velocity of the machine until the motion is checked and .then instant-ly lrelease the brake, so that no unnecessary labor may be imposed upon the animals when working at a proper speed.

In testimony whereof I have hereunto subscribed my name.

MARTIN HARRIS CORNELL. Witnesses:

ROBERT BEANS, LEMON BANEs.

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