US109331A - Improvement in elevators - Google Patents

Description

W. K. MARVIN. BLBVATOR.-

10.109,331. Patented Nov. 15, 1870.

tttzt tatzt WALTER K. MARVIN,

on NEW YORK, N.Y.

1 Letters Patent No. 109,331, dated-November 15, 1870.

iMPRovsMl-:Nr IN ELEvA-roRs.

The Schedule referred to' in these Letten Patent and making psrt of the hams.

Tool! whom 'it may concern Beit known that I, WALTER K. MARVIN, of the city, county, and State of New York, have invented a new and improved Elevator and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable othersskilled in the art to make and use the same, reference being had to the accompanying drawing forming part of this specifica-- tion.

My invcntioirconsists ina mode of producing the up and-down movements of an elevator-carriage'or platformby means of a chain or other weight, which maybe transferred from the carriage or platform to the balancc-box, or equivalent receptacle for said weight, or 'vice lversa, so as to ina-kei he one heavier than the other, thus causing the carriage to rise or descend, according as the greater portion of the weight is carried by the boxor by the carriage. y

The manner in which. my invention is or may be carried into effect will he readily understood by reference vto the accompanying drawing, which represents one mode of lapplying the invention.

Figure l represents a sectional side elevation of my device through the linea: x, showing the car in the act of descending.

Figure 2 is a vfront elevation of the same.

Figure 3 is a plan'of the same.

Figure 4 is a modification of the device forholdng vthe clutch-lever.

Similar letters of reference indicate corresponding parts. q In this vcase the letter A represents the frame in which the car B travels, the said can being suspended by the cord O which passes over a lixed pulleyon the shaft I), andis secured to the weight-box E, asI shown in theI drawing.'

F represents a chain of suitable weight. 'I he said chain hangs over the loose-pulley G on theshaft D'. The Vsaid chain is provided Awith sufficient slack, so as to allow the .weight of the same to-be transmitted from the balance-box to the car, or from the car to the balance-box, as the circumstances of the case may require, 'in order to raise or lower the car. j

Hiis a clutch set loose on the shaft D. .'lhe said clutch is operated by a lever, I, which is pivoted at J, the-end of the said lever I-passing through the end of the' weighted lever K, which will serve to hold the clutch steady in or out of gear.

Fig. 4 represents a modification' of the device for holding the clutch-lever steady in or out of gear, the 1 said modification consisting of a pulley, L, provided with a solid segment, M, in which a slot is made for Vthe purpose of receiving the end of the clutch-lever I.

The brake consists of a male-screw, P, working in a female-screw in the arm N', and bearing against the arm N. ',lhe'said arms are pivoted at Q, and are clamped against the sides of the pulley'O' by means of va llandsrope passing overthe fixed pulley R.

In order to operate this elevator, I first clamp the brake against the pulley O', and then pull the hand-rape S, which will throw the clutch in gear with the wheel '1, which meshes in the wheel U ou 'the shaft V. I then pull-the hand-rope W until I have caused a Sudicient amount of the chain F to be transposed frorn t-he balancebox to the car, or from thecar tothe balancebox,.so as to overcometlie weight to be raised or lowered. I then release the brake, and, by the balancing medium f tbe chain, the elevator will 'be moved, and the speed governed by the amount of friction allowed by thegbrake -on the aforesaid pulley.

Having thus describerlrny invention,

That I claim as new, and desire to secure by Leitels Patent, is-

1. Anelevator, in which the carriage and the balance-box connectedtherewith are combined witha chain or other weight-and means for transferring a greater or lesser portion of said chain or weight from the carriage to the balance-box, o r cicc versa, substantially as described, whereby, by the shifting ofthe chain or weight,.the carriage, together with its load, may be caused to rise or descend, as required.

2. The combination, with the elevator-carriage, tue balance-box, the chain or weight, and means for transferring the same, of a brake arranged to he operated from the carriage, so as to-regulate or entirely check the movement of the carriage as dcsired,.s`nhstantially as shown and set forth. Y

3, The weighted lever, or its equivalent, as described, in combination with the clutch, the chain-pulley, and the shaft upon which the same are mounted, arranged substantially as andl for the'purposes set forth.

4. The brake, constructed, arranged, and operating in the manner and for the purposes substantially as herein shown and described. l

.The above specification of my invention signed by .me this 13th day of April, 1869.

WALTER K. MAR VIN.

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