US761538A - Mechanical movement. - Google Patents

Description

.PATENTED MAY 31, 1904. -W.,A. PENTEGOST. MECHANICAL MOVEMENT.

APPLICATION FILED 0012,1902;

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No. '761;538. PATENTED MAY 31,1904.

,W. A. PENTEGOST.

\ MECHANICAL MOVEMENT.

APPLICATION FILED 00T.'2, 1902.-

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WILLIAM AUGUSTUS PENTEOOST, OF WORCESTER, MASSACHUSETTS. I

MECHANICAL MOVEMENT.

SPECIFICATION forming part of Letters Patent No. 761,538, dated May 31 1904.

Application filed, October 2, 1902.

To all whom it mlay'concern:

Be it known that I, WILLIAM AUGUSTUS PENTECOST, a citizen of the United'States, residing at Worcester, in the county of Worcester and Commonwealth of Massachusetts, have invented a new and useful Mechanical 'Move- .ment, of which the following is a specification.

My invention relates to improvements in mechanical movements employed 1n furnish- 1ng power for varlous purposes in which certain peculiar mechanism adapted to utilize gravity through the medium of weights form-- ing a part of said mechanism and arranged so as to be capable of being relatively changed, in a predetermined manner to produce results similar to those produced by other motors and enginesis used, as hereinafter described and claimed; and the objects of my improvement are, first, to provide mechanism whereby weights are utilized in an efficient and practical manner for moving ponderable bodies located either near to or at a distance from said mechanism; second, to afford a safe and durable substitute for an ordinary motor or engine which is capable of practical operation when applied to an elevator or to other devices of a similar nature or of such a nature as to render this invention applicable thereto and which is simpler and'less expensive to operate than other engines or motors used for a like purpose, and, third, to embody my improved mechanical movement in aworking machine or engine practicable for such uses as it may be adapted, a conspicuous 'example beingthe running of an elevator. I attain these objects by the mechanism illustrated in the accompanying drawings, in which- Figure 1 1s a side view of my improved mechanism, showing its application to an ele- 'vator, the movement being normally disposed,

as'when the elevator-car is half-way between the extreme limits of its travel; Fig. 1, a part of Fig. 1, showing the car and upper supporting and operating members; Fig. 2, a similar view showing the position of the parts when the movement is at one end of what may be termed its stroke; Fig. '3, aview showing said mechanism at the other end of its stroke; and Fig. 4, an end view of certain parts of the mechanism, the major weight being shown in section.

- direction beyond said plane or center.

Seria1N0.1 25,622. (No model.)

' Although the mechanical movement herein set forth is illustrated in connection with an elevator, and I consider it particularly adaptported bya suitable framework 12, is pro-' vided with a depending arm 13, rigidly attached' to the under edge thereof, the center of said arm being in line with the center of said shaft and at right angles to the longitudinal'axis of the walking-beam. The walking-beam 10 is further provided with a curved track 14: on one side and a substantially straight track 15 on the other side. The track 14 preferably. consists of two arcs or rails separated from each other and securely bolted or otherwise rigidly attached to the walking-beam, as best shown in Fig. 1. 'I prefer to elevate the track 15 above the walking beam for the greater part of its length and do this by means of suitable brackets, to which said track is securely attached and which are in turn bolted or otherwise rigidly fastened to said walking-beam. With the exception of one end of the track 15 the tracks 14 and 15 are both situated at one side of the .central vertical plane or pivotal center of the walkingbeam, the exception noted being that said track 15 extends a short distance in the oth(e)r f course the tracks 14 and 15, either one or both, may be raised or lowered from their present position as the exigencies of the case demand, andtheir length may be varied more or less to meetd ifferent conditions, there being no objection to lengthening or shortening either of the tracks in either direction; but if the length of the track 1 1 is increased toward the pivotal center of the walking-beam said track must be lowcred so th at it can pass beneath the shaft 11 and in order to utilize that portion of said track which passes beneath said shaft in this event it will be seen that a bend in the hanger 16 (presently to be described) is required, so as to permit the whole length of the track to be utilized.

The hanger 16 is designed to be supported by and move upon the track 1 1, andwhat I rails which compose the track, and hubs 20,

extending from opposite sides of said hanger and resting upon the upper concave edges of said truck. With the exception of the rolls 19 the truck 18 moves back and forth between the rails of the track, and the hanger 16 extends between said rails and through said truck some distance above the walking-beam when the same is normally disposed or stands with its longitudinal axis in a horizontal position, as shown in Fig. 1. minor weight 21 is attached to the upper end of the hanger 16. A link 22 has one end pivoted at 23 to the major weight 17 and the other end pivoted at 24; to the arm 13 a little distance above the base thereof. The pivot 23 is practicallyin the center of the weight 17, and the upper edges of the track 14 should correspond with an arc struck from the center of said pivot.

. Assuming that the force exerted by the load on the free end of the walking-beam 10 where no tracks are located is equal to that exerted by the hanger 16 and its weights, so that said walking-beam stands horizontally when the hanger 16 is moved so that its support represented by the truck 18 and the hubs 20 travels away from the shaft 11, the equilibrium is overcome, and the walking-beam begins to tilt and to approach the position shown in Fig. 2; but as the point 23 approaches a line dropped from the center of the shaft 11 the power of the Weight 17 decreases until only the power exerted by the weight 21 remains to do the work. This loss, however, is compensated for in a manner and by the means hereinafter described. On the other hand, when the hanger 16 is moved from the position shown in Fig. 1, so that its track-support approaches the shaft 11, the balance is overcome and the preponderance of power is shifted to the free end of the walking-beam, or rather to the load attached to the same. The result of this last action is to cause the parts to tend toward an assumption of the position shown in Fig. 3, the power 7 of the weights 17 and 21 being minimized as the change in position takes place until the weight 21 passes. the vertical central plane of the shaft 11, when said weight passes to the assistance of the load. The compensating means above referred to is also utilized to bring the parts into the extreme position shown in Fig. 3, because of the impossibility of entirely eliminating the weight 17 as a factor now on the wrong side of the What I term the center of gravity. The hanger 16 is free to turn upon the pivot 23 and the link 22 upon the pivot 24:; but the centers represented by said pivots can never approach each other. Hence it is possible to obtain the effects described by changing the position of the tracksupport of said hanger. What is true when the track-support of the hanger 16 is moved from the intermediate position in either direction is also true, although in a less degree, when said support is moved away from either of its extreme positi0ns-that is to say, when said support is adjacent to the end of the walking-beam by moving it toward the center that end of the walking-beam begins to rise and when the support is at the other end of its travel and is moved away from the center the same end of the walking-beam begins to descend.

In order to make up for the loss referred to in the preceding paragraph, what may be termed a compensating weight is employed, the same preferably consisting of a heavy roll 25, arranged to travel upon the track 15. The roll 25 is mounted in the end of a rod 26, the opposite end of which is pivoted to the upper end of a lever 27, pivoted at 28 to the framework 12 and having its lower end connected with the base of the arm 13 below the pivot 24 by means of a link 29. The parts are so arranged that the equilibrium of the walking-beam 10 is theoretically maintained only when the centers of the weight 21, roll 25, hub 20, and pivot 23 are in the same vertical plane, the weights being necessarily commensurate with the load. It should be stated in this connection that in the description previously given of the operation of the walking-beam and hanger the load must be less in the absence of the compensating weight 25, in order to secure the equilibrium there described, than when such weight is used. It is believed that the movement is not as practical without the compensating weight, and the aforesaid description was intended merely to explain the theoretical operation of the parts described. up to that point. Assuming now that the hanger 16 is shifted so as to depress the track end of the walking-beam, the roll 25 will be moved outward on the track 15 through the medium of the arm 13, lever 27, and connecting parts, and said roll adds its weight to that exerted by the weights 17 and 21, being actuated farther away from the center as the weight 17 approaches the center and begins to lose its power, until the parts stand as shown in Fig. 2. By changing the direction of the hanger 16 it will be readily seen that the roll 25 must begin at once to ap proach the center and to exert less and less power until it passes the center into the position shown in Fig. 3, when its power is added to that of the load.

The load in this case is represented by the elevator-car 30, suspended from a cable 31,

which passes over a'sheave 32,"suspended. 'in the usual manner, to a large pulley 33, tight on a shaft 34, suitably journaled in theframework 12. The lower end of the cable 31 issecurely fastened to the pulley 33. A cable 35 is attached at one endto thefree end of the walking-beam andat the other end to a small pulley 36, tight on the shaft 34. The

pulleys 33 and 36 are normally prevented from.

pended from the top of the elevator-well, passes; through the car, 30, and is attachedto the end.

of the lever 40. As a convenient means of shifting thehangerlt} a shifter-rod 43"is piv-I oted at one end to said hanger below the track 14 and at the other end to' an arm 44, forming;

7 part of a reversing-reel 45, which is mounted on a shaft 46-, suitably journaled in a framework 47. A rope 48 passesovera sheave49, supported ina similar manner as the sheave 32,

at the top of the elevator-well, and hasits lower ends fastened to opposite sides of the reel 45. One reach of the rope 48 passes through the car 30, and the necessary tension is provided for said rope by means of sheaves 5O 50,

bracketed beneath the first floor in any convenient manner.

- 1f the diameters of the pulleys 33 and 36 are as two to one, it will be necessary for the free end of the walking-beam to describe an arc.

the chord-of which'is' One-half'the distancethat the car is to travel in order to raise or lower. said car the requireddistance, and the weight required to raise the maximumload must be approximately twice that of' the car when loaded. It is obvious, however, that these proportions may be changed, and if they are as siX to one the practicability and efficiency of the mechanism are not impaired, but, on the contrary, are increased. ffllhe car 30 is operated from themside' 1n the following manner: To cause it to ascend, pull downward on that-part of the rope 48 which passes through the car and at the same time pull upward on the rope 42, in order to partly or wholly release the pulleys 33 and 36 from the brake, according to the amount of load relative to the weight. The movement given to the rope 48 rotates the reel to the right, and this moves the shifter-rod 43 and the hanger 16 in thesame direction. The car at once begins to ascend and continues on its upward course until the brake is again applied by being entirely released to the influence of the weight 41 or the walking-beam arrives at.

the end of its lifting stroke, when further upward movement of the car ceases. To descend, pull upward on the-rope 48 and partly release the brake; The reel 45 is this time rotated to the left by the rope 48 and draws the hanger 16 over to the center by means of the rod 43. The car now descends under the control of the brake and may be stopped by the same at any point desired, or if allowed to reach the bottom, the walking-beam then having completed its stroke in the other direction, all further motion-ceases. In manipulating the car it should generally be controlled and governed" by the brake in order to insure steadiness and evenness of movement, and for thefurther reason that in practice the weights which fur nish the power are in excess of the maximum load to theextentneeded to raise the same and overcome frictional resistance as well 'lthey should also be great enough to lift the maximum load at the desired speed. Hence j without the controllinginfiuence of thebrake a load less than the maximum would be propelled upward with too much swiftness.

A stop 51 maybe mounted on the framework 12 in-such a position as to receive .the

" weight 17 at the end of its inward travel, and

thus prevent liability of breaking or disarranging the'mechanism. v

- "he weight 17 may be formed in :part of separable slabs held to the base of the hanger 16by mean'sof pins 52, projecting from said base, a convenient method'of increasing or decreasing the weight being thus furnished.

' The ends of the track 15 may be curved upward more or less for the purpose of checking the roll 25 at the extreme limits of its travel, and this curvature, especially "if it approaches the horizontal when the walking beam is tilted, also serves in a measure to decrease the power required to shiftthe parts, since said roll can be more easily started from such a position than when it has to be moved initially'up an inclined plane. -This is a detail of'construction not thought to be of vital importance, but is mentioned herein as one of various modifications which will suggest themselves to one'skilled in the art.

The shifter-rod 43 may be pivotally connected with the hanger 16 above instead of.be low the track 14, if desired,'and the walkinging-beam may have arms or sections of unequal length. These and other changes 'of minor importance, including those hereinbefore mentioned, may be made without departing from the nature of my invention, which I seek to cover broadly. I do-not wish to be restricted to the exact construction herein shown and described, but desire to include all modifications falling within the scope of my invention and claims.

What I claim as my invention, and desire to secure by Letters Patent, is

1. A mechanical movement comprising a 1 member pivotally mounted between its ends a 7 IIC--' weighted member suspended from and slidingly' mounted on said first-mentioned member, and automatic means for controlling the swing of said weighted member.

2. In a mechanical movement, a track ad apted to rock, a member slidingly mounted thereon, and a second member pivotally mounted on the first and having weights above and below said track. the swinging motion of the second member being independent of the rocking motion of the track.

3. Ina mechanical movement, a member pivotally mounted between its ends and provided with a track, a suspended member slidingly mounted on said track, and automatic means for controlling tlie swing of said suspended member.

4:. In a mechanical movement, a member pivotally mounted between its ends, a second member suspended from the first, automatic means for controlling the swing of said second member, weightscarried by the second member, and means adapted to shift said weights relative to the pivotal point of the first member.

5. In a mechanical movement, a member pivotally mounted between its ends, a second member suspended from the first, automatic means for controlling the swing of said second member, weights carried by the second member, and means adapted to shift said weights relative to each other and to the pivotal point of the first member.

6. In a mechanical movement, a member pivotally mounted between its ends, a second member suspended from the first, automatic means for controlling the swing of said second member, weights carried by the second member, means adapted to shift said weights relative to the pivotal point of the first member, and a compensating weight movably mounted on the latter.

7. A mechanical movement comprising a member pivotally mounted between its ends and provided with a projection, a weighted member suspended from the first, the point of suspension being movable, and a pivotal connection between said suspended member and projection.

8. A mechanical movement comprising a member pivotally mounted between its ends and provided with a projection, and a Weighted swinging member slidingly mounted on said first-mentioned. member and pivotally connected with said projection.

9. A mechanical movement comprising a member pivotally mounted between its ends and provided with a projection, a weighted member suspended intermediate of its terminals from the first, the point of suspension being movable, and a pivotal connection between said suspended member and projection. I

10. A mechanical movement comprising a member pivotally mounted between its ends and provided with a projection, a second memvensss ber suspended intermediate of its terminals from the first, the point of suspension being movable, weights mounted on said suspended member above and below its point of support, and a pivotal connection between said suspended member and projection.

11. A mechanical movement comprising a member pivotally mounted between its ends, a weighted member suspended intermediate of its terminals from the first, the point of suspension being movable, and a movable compensating weight, the parts being arranged so that the centers of the weights shall be in the same vertical plane with the center of the point of suspension only once while the latter is passing from one end of its course to the other.

12. A mechanical movement comprising a member pivotally mounted between its ends and provided with a projection, a weighted swinging member slidingly mounted on said firstmentioned member and pivotally connected with said projection, and a compensating weight movably mounted on said firstmentioned member and also pivotall y connected with the projection.

13. A mechanical movement comprising a member pivotally mounted between its ends and provided with a projection, a weighted member suspended intermediate of its terminals from the first, the point of suspension being movable, a movable compensating weight, and pivotal connections between said projection and the suspended member and compensating weight, the parts being arranged so that the centers of the weights shall be in the same vertical plane with the center of the point of suspension only once while the latter is passing from one end of its course to the other.

14. The combination with a walking-beam suitably mounted and means to control a load connected with the free end of the same, of a weighted member suspended from and slidingly supported by said walking-beam, and automatic means for controlling the swing of said weighted member.

15. The combination with a walking-beam suitably mounted and means to control a load connected with the free end of the same, of a weighted member suspended from and slidingly supported by said walking-beam, adapted to swing independent of the rocking motion of the latter, and a compensatingweight movably mounted on the walking-beam.

16. The combination with a walking-beam suitably mounted and a load connected with the free end of the same, a weighted member suspended from and shiftingly supported by said walking-beam adapted to swing independent of the rocking motion of the latter, and means adapted to be operated at some remote point to shift said member.

17 The combination with a walking-beam suitably mounted and means to control a load connected with the free end of the same, of a weighted member suspended from and shiftingly supported by said walking-beam adapted to swing independent of the rocking motion of the latter, and means adapted to be operated at a remote point to shift said member.

18. The combination with a walking-beam suitably mounted and provided with a depending arm and a' track, of a weighted swinging hanger slidingly supported by said track and pivotally. connected with said arm.

19. The combination with a walking-beam suitably mounted and provided with a depending arm and a track, of a swinging hanger slidingly supported by said track and pivotally connected with said arm, and weights mounted on said hanger above and below its point of support. I

20. The combination with a walking-beam suitably mounted and provided with a depending arm and a track, of a truck adapted to travel upon said track, and Y a hub-provided weighted hanger carried by said truck and pivotally connected with said arm. 21. The combination with a walking-beam suitably mounted and provided with a depending arm and tracks, of a weighted swinging hanger slidingly supported by one of said tracks and pivotally connectedwith said arm, and a compensating weight mounted to move on the other track and also pivotally connected' with the walking-beam arm.

22. The combination with a walking-beam suitably mounted and provided with a depending arm and tracks one of which latter projects beyond the other, of a weighted swinging hanger slidingly supported by one of said tracks andpivotally connected with said arm, and a compensating weight mounted to move on the other track and'also pivotally connected with the walking-beam arm.

23. The combination with a walking-beam suitably mounted and provided with a depending arm and a curved and a substantially straight track, of a weighted swinging hanger slidingly supported by said curved track and pivotally connected with said arm, and a compensating weight mounted to travel on saidstraight track and also with said arm.

24:. The combination with a walking-beam suitably mounted and provided with adepending'arm and a curved track, of a weighted pivotally connected swinging hanger slidingly supported by said track and pivotally connected with said arm,

the supporting edge of the track being in conformity with an arc struck from the hanger end of the pivotal connection.

25.v In combination, a walking-beam suitably mounted, weights supported by said walking-beam, one of said weights being suspended from the latter, means to change the positions of said weights relative to each other and to the walking-beam support, and means to connect a load with the free end of the walkingbeam, comprising pulleys of different sizes.

26. In combination, a walking-beam suitably mounted, weights supported by said walking-beam, means to change the positions of said weights relative to each other and to the walking-beam support, means to connect a load with the free end of the walking-beam, comprising pulleys of different sizes, and a brake adapted to control said pulleys.

27. In combination, a walking -beam suitably mounted and provided witha depending arm, a weighted hanger slidingly supported by said walking-beam and pivotally connect- -ed with said arm, a reversing-reel suitably mounted, and a shifter-rod between said reel and hanger.

28. In combination, a walkingbeam suit-- ably mounted and provided with a depending arm, a weighted hanger slidingly supported by said walking-beam and pivotally connected with said arm, a compensating weightmovably supported by the walking-beam and also pivotally connected with the arm, a reversingreel suitably mounted, and a shifter-rod between said reel. and hanger.

- 29. In combination, a walking-beam suitably mounted and provided with a depending arm, a weighted lever slidingly supportedby said walking-beam and pivotally connected with said arm, a compensating weight movably supported by the walking-beam and also pivotally connected with the arm, a reversingreel suitably mounted, a shifter-rod connected with said reel and hanger, and means to connect a load with the free end of the walkingbeam, comprising differential pulleys.

30. In combination, a walking-beam suitably mounted and provided with a dependingarm, a weighted lever slidingly supported by said walking-beam and pivotally connected with said arm, a compensating weight movably supported by the walking-beam and also pivotally connected with the arm, a reversing-reel suitably mounted, a shifter-rod connected with said reel and hanger, means to connect a load with the free end of the walkingbeam, comprising difierential pulleys, and a brake for controlling said pulleys.

31. In combination, a walking-beam suitably mounted, a hanger slidingly mounted on said walking-beam, automatic means for controlling the swing of said hanger, a weight at the lower end of said hanger, and means to increase or decrease said weight.

In witness whereof I have signed my name to this specification in the presence of two subscribing'witnesses. I

WILLIAM AUGUSTUS IENTECOST. Witnesses:

REUBEN H. SOUTHGATE, FRED W. GHEEVER.

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