US279612A - Elevator-hatch - Google Patents

Description

(No Model.)

W. STEVENS.

BLBVATOR HATCH.

No. 279,612. Patented June 19,1883.

gif-f? N, PETERS. Phplvulhngnpner, wa'mngmn. D. c.

'i UNITE STATES PATENT OFFICE.

WILLIAM STEVENS, or PHILADELPHIA, PENNSYLVANIA.

ELEVATORFHATCH.

SPECIFICATION forming part of Letters Patent No. 279,612, dated June 19, 1,883.

Y Application filed May 4, 1883.` (No model.)

To all whom it may concern,.-

Be it known that I, WILLIAM STEVENS, of the city of Philadelphia, county of Philadelphia, and State of Pennsylvania, have invented an Improvement in Elevator-Hatches, of which the following is a speciiication.

My invention has reference to elevatorhatches; and it consists in certain improve` ments therein, as fully set forth in. the following specication, and shown in the accompanying drawings, which form part thereof.

Heretofore in making automatic hatch-doors for elevators in which the guide is arranged against the wall it has been necessary to place the arms or levers which lift the doors sufficiently far to the Sides that the rods which are attached to the doors shall pull backward when the said doors are raised to insure their being opened fully 5 otherwise the descending cage would catch upon their edges and be arrested. Innumerous instances it is found th at there is not sufficient space upon either side of the elevator close to the wall `to place said lifting-arms in such positions. My object, therefore, is to provide suitable means whereby said lifting arms or levers may be placed iii-back of the elevatorcage, and so arranged that the lifting ends of said levers or arms may come substantially in line with the raised hatchldoor, and yet shall so be devised as to tend to throw it back to insure its being opened fully.

In the drawings, Figure l is a sectional elevation of my improved automatic elevatorhatch doors on line a". x, and Fig. 2 is a sectional plan View of same on line y y.

A is the iioor.

B B are the hatch-doors, hinged at C (l to the said-iloor or hatch-frame.

` I) is the usual weight box, and has the guides M M, upon which the cage or platform E runs.

Secured to the side of the doors B, and at a short distance from their hinged edges, are the n brackets F, which when the doors are closed, project downward for a few inches. Connect# ing the ends of said brackets with the lifting ends of arm I of the lever I are rods G. The levers or arms I are preferably made of two distinct arms, I and I2, hinged together at K,

the fulcra of the compound* levers I, the said arms I and I2 being adjusted and held at any desired angle to each other by links and nuts J, as more fully set out in a patent granted to me August 8, A. D. 1878, and numbered 206, 842.

The pivot-points K are arranged closewto the guides M, so as to bring the ends of arms I in line with the hatch-door when open. Rollers L are secured to the cage E, and when the latter is descending press upon the arms I2 and 6o cause the doors to be lifted. -In ascending, the bow N, on top of the cage, raises the doors from below. i

The former location of the lifting devices is indicated by dotted lines on left-hand side of Fig. l, and it is evident that if bodily shifted toward the center, so as to bring` the lifting rod G in line with the door, it would be impossible to open the door fully, as 'the pull or lift would be in line with said door from its 7o hinged edge upward. Now, by the addition of the bracket F, this difficulty is readily overcome, as the slightest movement of the lifting rod G tends to throw back the door clear of the descending cage. If desired, the

lifting-arms I may be made of one piece, and may be located at any place between the two hatch-doors, or even slightly beyond them.

I do-not limit myself to the exact construction shown, as it may be modified in various 8o ways without departing from myinvention.

Having now described my invention, what I claim as new, and desire to secure by Letters Patent, is

l. In an automatic hatch-door attachment for elevators, the hinged doors, in combinati ouwith lifting-arms arranged to be actuated bythe descending cage, the lifting ends of said arms being arranged at or about in line with the open hatchdoors, and connecting 9o mech anisln between said arms and doors,whereby the Said arms tend to force the doors outward beyond a vertical line to clear the hatchway, substantially as an d for the purpose specified.

2. The combination of thc hatch-doors with lifting arms located within a vertical line through said doors when raised, rods or links connecting said lifting-arms to the door a short distance below its under face, and a cage or Iool platform adapted to operate said liftingftrnis In testimony of which invention I hereunto in the tot of descending, substantially as und set my hond. for the purpose specified.

3. The combination of the hatch-doors B, WM. STEVENS. 5 brackets F, projecting below the said doors,

rods G, lifting-firms I, and einge E, having Vitnesses: rollers L, substantially as and for the purpose R. M. HUNTER,

specified. R. S. CHILD, J1'.

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