US363121A

US363121A - Thied to chaeles m

Info

Publication number: US363121A
Authority: US
Publication date: 1887-05-17
Anticipated expiration: 1904-05-17

Description

(No Model.) 2 Sheets-Sheet ,1.

Gr. M. DAVS.

ELEVATQR. N0. 363,121 PatntedMay 17, 117887..

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(No Model.) 2 Sheets-Sheet 2.

i G. M. DAVIS.

ELBVATOR. M

No. 363,121. Patentedmay 17, 188% 1 w10 l f f 0' VWL... L 1 WT @Jalan W Tali' g /Z 4' T Wgw@ liNiTnn STATES PnTnNT Ormea.

GOUVERNEUR M. DAVIS, OF XVATERBURY, CONNECTICUT, ASSIGNOR OF ONE- THIRD TO CHARLES M. FABRIQUE, OF SAME PLACE.

I ELEVATO R.

SPECIFICATION forming part of Letters Patent No. 363,121, dated May 17, 1887.

Application filed September 13, 1886. Serial No. 213,383.

To aZZ whom it may concern.-

Beit known that I, GoUvERNEUR M. Davis, residing at Vaterbnry, in the county of New Haven and State of Connecticut, have invented certain new and useful Improvements in Elevators; and I do declare the following to be a full, clear, and eXact description of the same, reference being had to the accompanying drawings, which form a part of this specification.

My invention relates to an improvement in elevators, the object being to provide simple and efficient means for guarding against accident in them.

Vith these ends in View my invention consists in certain details-of construction and combinations of parts, as will be hereinafter described, and pointed out in the claims.

In the accompanying drawings, Figure l is a View in front elevation of an elevator em- Q'o bodying my invention. Fig. 2 is a plan View thereof. Fig. 3 is a view in vertical section on the line a a of the preceding figure. Fig. 4 is a view in transverse section on the line b b of Fig. 3. Fig. 5 is a detached view of a locking-head, the upper end of a gate, and seetions of the chain, such parts being shown in position for tying `up the latter. Fig. Gis a similar view with the parts in position for the free action of the chain. Fig. 7 is aplan view 3o of the parts in the postions in which they are shown in Fig. 5. Fig. 8 isabroken plan view of the car, a-fioor, a gate, and a gate-lock, the latter being unlocked. Fig. 9 is a view of such parts in vertical section. Fig. l0 is a broken V view showing a floor, a gate, and a gate-lock in front elevation, the latter being locked; and Fig. 11 is a view thereof in vertical seetion.

rI he well A, car B, gates C C, suspension-ca- 4o ble D, operating-chain E, and the operating mechanism F of the elevator may be of any approved construction, the gates being vertically movable in grooved uprights Cr G, and each being counterbalanced, so thatif left free to act it will descend and close of its own gravity. This last feature is shown in Fig. 1 of the drawings, in which the lower gate has a connection, H, and a weight, I, attached to the outer end thereof. Each gate is also provided o at its upper end, upon its inner face,with a me- (No model.)

tallic bearing-plate, J, as shown by Figs. 5, 6, and 7 of the drawings.

My improved locking-head consists, as herein shown, of a sphere, K, provided with a central perforation, L, through which one partof the operating-chain passes, with an arm, M, having its outer end curved, and with a shank, N, carrying a set-screw, O, and receiving a spindle, P, mounted so as to turn freely in a standard or plate, Q, and coupled with the shank 6c, through the said set-screw. A stud, It, projecting from the well, is located in position to Isupport the arm in place for engagement by the gate. The said perforation L, as herein shown, is cylindrical and only large enough to permit a free movement of the. chain through it, so that a slight turning of the head will deflect-and grip the chain, which practically has no lateral play in the opening. Heads so constructed are secured through their plates to one side of the well and in position for the engagement of their arms by the tops of the respective gates, preferably when the same are at or near the limit of their upward movement. Then asa gate is lifted,this being dene by hand and with slight effort, as it is nearly counterbalaneed, 1t engages with the arm of the head next above it and turns the sphere thereof, as shown by Fig. 5 of the drawings, producing asharp deflection in the operating-chain, which is there- S0 by locked or tied up, so that it cannot be moved for starting the ear up or down. In this adjustment of parts the arm of the head bears against the plate J of the gate with sufficient force to overcome the gravity of the gate 8 5 and hold the same in its elevated position, from which it is pushed or pulled down by hand against suoli friction to release the arm and permit the head to be turned back by the weight of the chain, which may then be moved 9o through it freely for starting the car.

The function of the locking-head, it will be observed, is to virtually lock the car, so that it cannot be started upor down until after the gate of the iioor at. which it was stopped has g5 been closed, and this with an obvious increase in safety in the operation of the elevator, and as each gate, and hence each iloor, has a locking or tying head, each floor has equal protection.

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`with a beveled head, Z, located at its forward end and with a stop, A', and being actuated kin its forward movement by a spiral spring,

B', and pressed back or retired for unlocking the gate by an arm, C', attached to the under face and to the corner of the car, which when it reaches the level of the door pushes back the spindle and unlocks the gate, which cannot be opened until the car reaches this position of sa'fety. Each gate, and hence each oor,be ing provided with a gate-lock, as described, each floor has equal protection.

'Having described my improved elevator in detail, I will now set forth the mode of its operation. y

When a gate is closed, it cannot in the ordinary use of the elevator be unlocked, except by the engagement of the arm C', carried by the car B, with the beveled head Z of the horiizontal spindle V, located in the floor, protected by the particular gate, such head andv spindle being pushed inward, whereby the latch U, carried by the latter, is withdrawn from the hole T in the plate S, secure'd'to the lower end of the gate, which is then free to be raised by hand, and this, as has been said, requires but little effort, as the gate is nearly counterbalanced by its weight I, as described. Then as the gate is raised its plate J engages with the arm M of the locking-head K and ro tates the same, causing a defiection in the chain E, which is thus tied up. The friction and pressure developed between the gate and the said arm M operate tosustain the gate in its open position against its tendency to close by reason of its being heavier than its weight I. So long as the gate is open the arm M will remain elevated, the head K rotated, the chain E tied up, and the car BA from being moved, and so long as the car stands adjacent to the floor of which the gatel is open no accident can of course occur. To start the car the cable must be untied.' This can be done only by pulling down the gate, which when so moved permits the arm M to be returned to its -normal position and the head K to be turned back by the weight of the cable, which when deflected exerts a constant tendency to straighten out, and hence to turn the head. Therefore the very act of untying the chain to start the car involves pulling down the gate, which will avoid accident, otherwise liable to occur by the removal of the car from its position adjacent to the floor. Then as the car is moved up or down its arm C' breaks contact with the beveled head Z, which, with the spindle V, is then thrown forward by the spring B', and the latch U moved into the hole J in the plate S, whereby the gate is locked in its closed position and remains so until the Canis brought adjacent to the door protected by it, and unlocks it again by pushing back the said head and spindle.

It will thus be seen that an elevator furnished with my improved devices, making the starting of the car dependent upon closing the gates, and the opening of the gates upon the stoppage of the car in a position of'safety, is provided with two safeguards of obvious value against accident.

Having fully described iny invention, what I claim as new, and desire tosecure by Letters Patent, is- 4 1. In an elevator, the combination, with a car, of a chain or cable for operating the saine, a locking-head provided with a fixed opening through which the chain or cable passes, the walls of such opening being adapted to grip the chain or cable when the opening is carried out of line with the same, and means for moving the. head to deliect its opening from alignment with the chain or cable, substantially as setforth.

2. In an elevator, the combination, with a car, of a chain or cable for operating the same and a locking-head provided with a fixed cylindrical opening through which thechainor cable passes, the walls of 'such opening gripping the chain or cable when the opening is carried out of line withthe same by a deflection of the head, substantially as set forth.

3. In an elevator, the combination, with a car, of a chain or cable for operatin g the s anie, a locking-head for tying up such chain or cable, and a gate, the head being adapted to be operated by the gate, substantially as set forth.

4. In an elevator, the combination, with a car, of a chain or cable for operating the same, a locking-head for tying up such chain or cable and provided with an arm, and a gate engaging with the said arm to operate the head, substantially as set forth.

i 5. In an elevator, the combination, with a car, of a chain or cable for operating the sanie and a. lockiiig-liead for tying up such chain or cable, the said head being adapted to hold the gate in its open position, substantially asset forth.

6. In an elevator, the combination, with a car, of a chain or cable for operating the same, a locking-head for tying up such chain or cable, and a gate, the said head having an opening to receive the chain or cable and being provided with a shank, through which it is swiveled, and with an arm which isengaged by the gate, substantially as set fort-h.

7. In an elevator, the combination, with a gate and car, of a slidable spindle located in stationary frame-work and a latch carried by such spindle and engaging with the gate to lock the saine, the spindle being operated in unlocking the gate by the car, substantially as set forth.

8.111 an elevator, the combination, with a gate and car, of a slidable spindle located in IIOV stationary framework, alatch carried by such and an automatic gate-1ock unlocked by the Spnd1e,aplate secured to the gate and adapted car, substantially asset forth.

to be engaged by the latch, and a locking- In testimony whereof I have signed this spring for the spindle, which is operated in specification in the-presence of two subscrib- 5 unlocking the gate by the car, substantially ing witnesses.

as set forth.

9. In an elevator, the combination, with a GOUVERNEUR M' DAVIS' ear, of a chain or cable for operating the same, Witnesses: a looking-head for tying up such chain or F. CHILLINGWORTH,

1o cable, a gate adapted to operate such head, CHAS. L. SWAN, J1.