US365791A - Hatchway-operating device - Google Patents

Description

(No Model.)

P. BYRNE.

HATGHWAY OPBRATINGDBVIGB. Y No. 365,791. Patented July 5, 1887..

Nv PETERS, PlwtLllhngmpher, washington. Dc,

UNITED STATES PATENT Prien.

PATRICK BYRNE, OF NASHVILLE, TENNESSEE.,

HATCHWAY-OPRATING DEVICE.

SPECIFICATION forming part of Letters Patent No. 365,791, dated July 5, 1887.

Application tiled July 23, lSEG.

To @ZZ whom, it may concern:

Be it known that I, PATRICK BYRNE, a citizen of the United States, residing at Nashville, in the county of Davidson and State of Tennessee, hav-e invented a new and useful I m provementin HatchwayOperating Devices for Elevators, of which thefollowing is a specication.

My invention relates to an improvement in elevators, and more particularlyto the hatchway-doors of the same; and the object of my invention is to provide balanced elevator-doors for the hatchway and mechanism for automatically opening and closing the same as the elevatoi.1 ascends or descends; and my invention consists in the peculiar construction and combination of devices, that will be more fully set forth hereinafter, and particularly pointed out in the claim.

In the drawings, Figure l is a` vertical sectional view of an elevator provided with balanced automatically operating hatchwaydoors embodying my improvements. Fig. 2 is an enlarged detail view of one of the operating-arms. Fig. 3 is a detailed end elevation of the same. e l

A represents the usual vertical guidevposts.

B are the iloors, C the hatchways, and D are the doors to close the hatchwa'ys, the said doors being pivoted or hinged at their outer edges to the sides of the hatchway, as at E, and meeting at their inner edges centrally in the hatchways when the doors are closed ,as shown in the lower portion of Fig. l. i

On the inner sides of the vertical posts `A, immediately above the hatchways, are made vertical recesses F, which are of sufficient height to admit and receive the doors D when the latter are open, as shown by the dotted lines in Fig. 1, so that the inner sides of the doors will be flush with the inner sides ofthe posts.

G represents the elevator cage or platform, the sides of which that bear against theinner sides of the posts are provided with vertical metallic straps or tracks H. The lower ends of the said tracks are bent under the bottom ofthe cage or platform, and are secured thereto by means of vertical bolts l', and the said tracks extend above the cross-beam K at the upper end of the cage or plat-form, incline upw ardly from the ends of the said beam, and meet Serial No. 208,877. (No model.)

directly over the center thereof, as shown. A vertical brace-bar, L, extends upwardly from the beam K, and is connected to the central portion of the strap or guide above the cageA M represents the elevatingrope, which is operated by the usual wellknovvn mechanism to raise or lower the cage. Extending across the bottom of the cage is a guide-track, N, and at the ends of the said track, at the sides of the bottom of the case, are journaled anti-friction rollers O, which are mounted in suitable frames or castings, I.

At a suitable distance above each hatchway and to the posts A are secured outwardly-pro jecting horizontal brackets R,to the outer ends of which are pivoted segmental rockingleverarms S, the said arms having sides .S and S'l arranged at an angle of about sixty degrees with relation to each other, and connected by a curved side, S3. The side S2 proj ccts slightly beyond the curved side S3, and is provided with an anti-friction roller, S".

T representsacircularweight, which. isslotted on one edge, andis thereby adapted to be tted to the curved side of the lever-arm, and is provided with a setscrew, T', the function of which is to rmly secure the weight to the said side of the levcr-arm. Near the point where the sides S and S" of the lever-arms meet is attached a connectingi'od, U, which extendsto one of the folding doors and is connected thereto, as at U.

The operation ot' my inv'entionis as follows: The doors D are normally closed in a horizontal position over the hatchways, and the upper port-ions of the curved sides and of the angular sides S2 of the lever-arms project inwardly from the guideposts into the vertical path traversed by the cage or platform. When the latter is elevated, the guide at the upper end of the cage strikes against the under sides of the doors, raising them to a vertical position and' forcing them into the recesses F of the guide-posts. The said doors are provided on their under or innersides with anti-friction rollers D, which bear against the guide or strap H.

It will be noted that the operation oli opening the doors to a vertical position causes the rocking levers S to be moved through a quarter ot' a circle, thereby causingthem to be entirely withdrawn vfrom the inner sides of main in contact with the bottom of the cage,

the guide-posts, so as not to project into the pathway ofthe cage.` are in this position, their friction-rollers S4 are just lush with the inner sides of the guideposts, and as the cage continues to rise the strap II bears against thesaid rollers and keeps the levers R in that position, so as to cause them to keep the doors open until the vertical track of the cage entirely clears the rollers S4.

It will be observed that when the doors are in ahorizontal position the levers S projectinwardly, thereby throwing all their weight upon the inner sides of their fulcrums, and that the rods U are attached slightly beyond the outer sides of the fulcrums, thereby causing the projecting inner portions of the levers to counterbalanee the doors. The weights T, which are attached to the levers, maybe oi' any necessary weight, in order to cause the levers to exactly counterbalance the doors, as the weight of the doorsl for the hatchways of elevators varies in different cases. As soon as the ascent ofthe cage or platform brings the rollers S* to the bottom thereof, the weight of the levers S causes them to reverse their movement and partly closethe doors. The rollers S4 reand continue to bear and travel under the track N of the cage during a portion of the distance traversed by the cage, thus causing the doors to be closed gradually and at aspeed exactly equal to the speed of the elevator. This prevents the doors from closing the hatchways with a bang, and thus avoids noise, and

When the lever-arms of the doorsbear against the vertical straps H, thereby keeping the doors open, andwhen the upper inclined portions of the strap reach the said rollers they canse the doors to be gradually closed, as before.

Having thus described my invention, I claimf f The combination, with the elevating cage or platform G, of the pivoted segmental rocklevers S, comprising the arms SS2 and curved arms S3, the arms S2, projecting into thepath of the cage or plat-form, the weight T, adj ustable along the curved arms S3, and the rods U, connect-ing the doors with the arms Si, as set forth.

In testimony that I claim Vthe foregoing as myown I have hereto affixed my signature in presence of two witnesses.

- PATRICK Brenn.

I-I. B. GRAY.

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