US494693A - Weight-motor - Google Patents

Description

(No Model.) 4 Sheet-Sheet 1.

No. 494,693. Patented Apr 4,1893.

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(No Model.) .4 Sheets-Sheet 2.

0. E. 1-1103,- L. MQDONALD & J. D. McDOWELL. WEIGHT MOTOR.

No. 494,693. 7 Patented Apr. 4, 1893.

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(No Model.) 4 SheetsSheet 3.

9. E; RICE, L. B McDONALD &- J. D..M0'DOWELL'.

WEIGHT MOTOR.

No. 494,693. Patented Apr. 4, 1893.

(No Model.) 4 Sheets- -Sheet 4.

G. E. RICE, L. B. McDONALD & J. D. MQ'DOWELL. WEIGHT MOTOR.

No. 494,693. I Patented'Apr. 4, 1893.

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UNIT D STATES PATENT OFFICE.

CHARLES E. RICE, LEWIS B. MCDONALD, AND JAMES D. MCDOWELL, OF LITTLE ROCK, ARKANSAS.

WEIGHT-MOTOR.

SPECIFICATION forming part of Letters Patent No. 494,693, dated April 4, 1893.

Application filed May 25,

T aZZ whom it may concern.-

Be it known that we, CHARLES E. RICE, LEWIS B. MCDONALD, and JAMES D. McDow- ELL, of Little Rock, Arkansas, have jointly made a new and useful Improvement in Weight-Motor, of which the following is a full, clear, and exact description.

The novelty in the present invention consists in the means and mechanism and in the construct-ion and combination of the parts as set forth and claimed.

The most desirable mode of carrying out the improvement is exhibited in the annexed drawings, making part of this specification,

in which Figure 1 is a side elevation (a portion of the frame-work broken away) of the improved apparatus; Fig. 2 a vertical section on the line 2-2 of Fig. 1; Fig. 3 a vertical section upon the line 3-3 of Fig. 2; Fig; 4 a plan of the parts shown in Fig. 3; Fig. 5 a plan of the portion (the right hand portion as shown in Fig. 1) of the apparatus containing the capstan; Fig. 6 a side elevation of the eccentric gearing, the parts being as when the pump-rod is moved downward; Fig. 7 a similar view of the eccentric gearing, the parts being as on the up-stroke of the pump-rod;

and Fig. 8 a plan of the parts of Fig. 6. The

last six named views are upon an enlarged scale.

The same letters of reference denote the same parts.

The frame-work of the apparatus is usually, and mainly, in the form of a tower, A, substantially as shown. The weight, B, which may be of any preferred form and nature, is attached to a rope or other suitable tie, C, which is carried over an overhead or upper bearing, such as the sheave D, arranged at a suitable elevation in the tower, and thence to a part such as the drum, E, upon which the rope is adapted to be wound. The drum is attached to a shaft, e, journaled at e,'e, and it also carries, or is extended to form, another drum, E, preferably of larger diameter than that of the drum E, upon which another rope F, is adapted to be wound. The last named rope leads from the drum, E, to a capstan G. To suit the relative arrangement of said drum and capstan an intermediate bearing, H, for

1892. Serial No. 434,332. (No model.)

E, and'wound upon the capstan, and the other rope C, isthereby wound upon its drumE, and the weight elevated to thedesired level. \rVe desire not to be restricted to the means described, or any particular means,'f or rais-- ing the weight: neither to any 'special arrangementor construction of drumor other part upon which the weight-rope is wound,

.and whereby the power of the weight is stored to be used at will. We, however, prefer the means exhibited.

Under some circumstances the described weight-power can be taken ofi from the pulley, drum, shaft, or other part upon which the rope is wound, quite directly, but, to more fully carryout the improvement, and to multiply the motion of the shaft e, the following arrangement is preferably adopted. Said shaft, 9, is provided with a gear, I; this gear engages with a pinion J attached to a shaftj, that isjournaled in bearings j",j, and provided with a gear J; said last named gear in turn engages with a pinion K, upon ashaft, k, that is journaled in bearings k, It, all substantiallyasshown. Theshaftk,isthusdriveu from the shaft, e, and at a much higher rate than that of the shaft 6. Its rate, however, is substantially uniform .as long as the weight is descending,-but its motion, in turn, is communicated to produce a variable rotary motion in another shaft Z, journaled at Z, Z, and, preferably as follows: two gear wheels K and L, are hung eccentrically upon their respective shafts k and Z, and engage with. each other substantially as shown; the shaft Z is thus driven by the shank k, and at every revolution thereof it is driven part way round, say, half Way round, more rapidly and the remainder of the revolution less rapidly, and the leverage increased during the slower movement and lessened during the. quicker movement. The gear wheels are preferably circnlar,'although gear wheels hung eccentricallyand combined as described, but of a'difthe crank M, connected directly with the pump-rod, N, of the pump, and it might be termed the pump-rod shaft. The pump itself is not shown. It is of any of the customary forms adapted to be driven by a reciprocating motion.

The relative arrangement of the wheels K, L, is shown more distinctly in Figs. 6 and 7. In Fig. 6 the pump-rod is supposed to be making its down-stroke, and the driven shaft, Z, is moving at its maximum rate, and the driving shaft his exerting its least power. But as the pump is supposed to be a single acting oneit is only necessary to lower the pump-rod and pump-plunger, and for this work but little,if any, power is needed, and the sooner the pump-plunger or bucket is brought into position to act the better. In Fig. '7, the pumprod is supposed to be on its up-stroke, and the driven shaft is moving atits slowest rate, and the driving shaft is exerting its maximum power, which is desirable in view of the fact that the load is now being lifted. Thus, at each revolution of the driving shaft, its power increases with the work to be performed, and diminishes as the load is lightened. An important feature, however of this portion of the mechanism is the means for regulating the described motion of the eccentric gearing.

0 represents what might be termed a counterbalance, preferably in the form of a weighted arm fastened to the shaft Z, and projecting therefrom in the opposite direction to that of the crank M: it serves to balance the pumprod both in its upward and in its downward movement, at least to an extent sufficient to.

prevent the rate of the motion of the parts from changing too abruptly. The weight 0 is adjustable upon the arm 0 toward and from,

the shaft Z.

arm 17, secured to the shaft to rotate therewith. At one of its ends, and preferably at its ends respectively, it is provided with vanes 11' and p which are adapted as the rotation of the shaft 70 is accelerated, to open or turn more flatwise and thus offer more resistance to the rotation of the shaft, and, on the other hand, when the shaft motion is slackened, to turn more edgewise and offer less resistance. To this end the vanes are each jointed at the inner end,p thereof to the arm 13 to enable the vanes to turn thereon as indicated by the positions of the vanes shown in the full and in the broken lines in Fig. 3, and, at a point between the inner and outer end of the vane, are elastically connected with the arm by means of the spring 19, substantially as shown. That is, the spring yields when the shaft motion is accelerated, allowing the vane to open, and, when the shaft motion is checked, the spring acts to turn the vane into its full-line position. weighted, as at 12 12 The arm, may be To enable the weight to be wound up without working the pump-rod and the parts more immediately therewith connected, the shaft 3' and gear J are adapted to be connected by means of a paWl-and-ratchet mechanism Q, which acts to unite the gear and shaft to turn together only when the weight is running down.

In operation, the weight, in the manner indicated, is elevated to the preferred height and there upheld until it is desired to operate the pump. Whatever has been applied to the capstan for rotating it in efiecting the elevation of the weight is suitably disconnected therefrom to leave the capstan and drums free to turn whenever the weight is allowed to drop. Any suitable means, (not shown) may be employed to secure the weight in its tip-position, and to freeit when it is to be dropped, and for braking the weight in its descent. 0n releasing the weight its rope acts to effect the rotation of the drums and the various shafts and gears in the direction indicated by the arrows at, Fig. l, and the pn m p-rod and pump are accordingly operated. After its power is exhausted the weight is again elevated, and the operation is repeated.

We desire not to be restricted to a pump in the use of the hereindescribed mechanism. That is, the rod M might be any reciprocating part. Nor do we wish to be limited to the eccentric gearing for transmitting the drum-shaft motion, derived from the falling weight, to the pump-rod.

We claim- 1. In a pumping mechanism, in combination with a primary train of gearing, an cecentricgear engaging the last wheel of the train, another eccentric gear engaging that first mentioned, a crank on the shaft of the last-referred-to eccentric gear, and a counterbalance between the crank and said last gear.

2. In a pumping mechanism, in combination with a primary train of gearing, an eccentric gear engaging the last gear of the train, another eccentric gear engaging that first mentioned, stationary bearings for the shafts of said eccentric gears, a crank'on the shaft of the last-referred-to eccentric gear, an adjustable counterbalance between the crank and said last gear, said eccentric gears being so arranged as to allow a rapid downward movement and to cause a slow and powerful upward movement, substantially as set forth.

3. The governor consisting of the weighted arm, and the eccentrically-held pivoted vanes, substantially as described.

8\Vitness our hands this 20th day of May, 1 92.

CHARLES E. RICE. LEWIS B. MCDONALD. JAMES D. MODOVVELL. \Vitnesses:

RICHARD CHARLES MCDONALD, G. W. SHINN.

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