US1007043A - Latch for elevator-doors. - Google Patents

Description

G. M. PEELLE. LATCH FOR ELEVATOR DOORS.

APPLICATION 11,111) AUG.16. 1911.

1,007,043. 1 Patented Oct. 24, 1911.

wi f neooao 5 wva Mm COLUMBIA PLANOURIAPH 50., WASHINGTON. Dv c.

UNITED sra'rnis PATENT OFFICE.

CALEB M. PEELLE, or BROOKLYN, INEWVYVORK', AssIGNC-R o 'IHE FEELLE Co, or NEW YORK, N. Y., A CORPORATION on NEW YORK.

LATCH roa nnnvaronrnoons.

Specification bf Letters Patent.

Patented 0a. 24, 1911.

Application filed August 16, 1911. Serial No. 644,273.

To all whom it may concern: 4

Be it known that I, CALEB M. PEE LE, a citizen of the United States, and resident of Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Latches for Elevator-Doors, of which the following is a Specification.

The invention relates to improvements in latches for elevator-doors used for closing the. passageways leading to elevator-shafts, and has particular reference to fire-proof sectional doors, arranged in two parts and connected together and suspended for ver tical movement toward and from each other; and the object of the invention is to provide a safety latch or stop therefor, which, while permitting of the normal opening and closing movements of the doorsections, will, in case of breakage of the suspension means thereof by reason of fire or other causes, operate to maintain the sections in closed relation to prevent the passage of flame.

In describing the invention in detail reference is had to the accompanying drawing, forming a part of this specification, and wherein like characters of reference are used to designate like parts throughout the several views, and in which:

Figure 1 is a side elevation of a portion of a wall of an elevator-shaft, having a doorway therein closed by a sectional-door.

provided with the improved latch embodied in the present invention; Fig. 2 is an enlarged detail view of the latch, shown in ele vation, taken at right angles to Fig. 1; and Fig.8 is ground plan of the same, show ing portions of the adjacent parts in section.

Numeral 1 designates the vertical wall of an elevator-shaft, having a doorway 2, adapted to be closed by the two- part door 3 and 4. Upon the wall of the shaft are fixed in the usual manner a pair of main supporting angles 5 and 6, upon the upper ends of which are mounted the sheave-wheels 7, carrying the flexible connections 8, one end of each being attached to the upper doorsection 3 for the support thereof, and their opposite ends connected by means of the bars 9 to the lower door-section 4. As thus connected together and mounted upon the sheave-wheels, the door sections are arranged in counterbalanced relation for vertical movement toward and from each other, and upon the disconnection of the spring catch, 10 they may be readily opened or closed by an operator. Ifor vertically direc ting the door-sections,guide-bars 1 1 are fixed to the main supporting angles 5 and 6, and are slidingly engaged by the guideblocks 12, which are secured at several points upon the side edges of the sections.

The safety-latch comprises a base-plate 13, fixed at a suitable point by bolts or rivets to the main angle 5,, and provided with a fixed pin 14, uponwhich is pivotally mountea the latch-lever 1M5, having at its] u per end a head, preferably consisting of an antifriction-roller 16, carried by a pin 17-, fixed in bifurcat'ed jaws 18, formed with or fixed to said lever. Also fixedto the base-plate is a guide loop or hook 19, which not only acts to prevent lateral movement of the lever 15, but also serves to limit its out-ward or projected movement, which position is normally maintained by the lever under the influence of gravity by reason of its shape and arrangement of parts withrespect to its pivotal support 14, to cause an overbalancing effect. The normal outward position of the latch-lever is further yieldingly maintained by the leaf-spring 20, one end of which is fixed to the main angle 5, while its opposite or free end engagesa pin or projection 21, secured to the lever. Intermediate of its ends, the latch-lever is provided with a projecting stop-lug 22, adapted to engage one of the free ends of' the stop or hanger bar 23, secured to thelower. doorsection 4, and which also serves as connecting means for the support thereof. Fixed upon the upper door-section adjacent the stopbar 23, of the lower door-section, is an actuating-arm 24, the free end of which is suitably shaped and disposed for engagement with the roller 16, comprising the head of the latch-lever.

Referring to Fig. 2, the latch-lever, as indicated respectively by full and dotted lines to show the projected and retracted positions thereof, will be readily pushed aside upon the normal opening movement of the door-sections, which movement separates the stop-bar 23 and the actuating-arm 24, secured respectively to the lower and upper door-sections, and urges the said arm into engagement with the roller 17 to retract the latch-lever against the action of gravity and the spring 20, and provides a. clearance between said stop-bar and stop-lug 22 to permit of the free opening movement of the door-sections. During the closing movement of the door, the stop-bar as it moves upward engages the beveled shank of the stop-lug to retract the latch-lever, allowing the latter to spring back into its normal projected position upon the complete closing of the door, suflicient clearance only being allowed between the bottom edge of the stopbar and the top edge of the stop-lug for the engagement of the actuating arm and roller. It will thus be obvious that the normal opening and closing movements of the doorsections will not be arrested by the action of the latch. If, however, by reason of fire or other causes the supporting chains or connections between the door-sections become broken or disengaged, both door-sections will tend to fall, the latch-lever will remain projected, and the stop-lug on the latter will be engaged by the stop-bar 23 for the support and maintenance of the door-sections in closed relation.

Vhile I have shown and described a single latch upon one side only of the doorway, it will be obvious that in doors of considerable width a second latch may be applied to the. opposite side thereof and in a similar manner serve to additionally support the door. It will be evident that upon the breakage of the chain connections of the door-sections, the free upper section may be either carried upon the lower section, or, as in common practice, independently thereof upon stops fixed to the main supporting angle.

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

1. The combination of a two-partdoor having its sections connected together and suspended for vertical movement toward and from each other, a latch-lever yieldingly supported adjacent said do0rsections and normally projected, a stop-bar fixed to the lower section of said door and adapted to engage said latch-lever in its projected position to arrest the movement of said door, and an actuating-arm fixed to the upper section of said door and adapted to engage and retract said latch lever to permit the movement of the door, substantially as set forth.

2. The combination of, a twopa.rt door having its sections connected together and suspended for vertical movement toward and from each other, a latch-lever yieldingly supported adjacent said door-sections and normally projected, and provided with astop-lug and a head, a stop-bar projecting from the lower section of said door and adapted to engage the stop-lug of said latchlever in its projected position, and an actuating-arm projecting from the upper section of said door and normally adapted to engage the head of said latch-lever to retract said stop-lug, substantially as set forth.

3. The combination of a two-part door having its sections connected together and suspended for vertical movement toward and from each other, a latch-lever pivotally supported at one end adjacent said doorsections, a roller mounted on the opposite end of said lever, av stoplug formed on the lever intermediate its ends, a stop for limiting the outward or projecting movement of said lever, a spring for normally projecting the lever in contactwith the stop, a stop-bar fixed to the lower section of said door and adapted to engage the stop-lug on said latchlever in its projected position to arrest the movement of said door, and an actuatingarm fixed to the upper section of said door and adapted to engage the roller on said latch-lever for the retraction of the latter to permit the movement of the door.

Signed at New York in the county of New York and State of New York this 15th day of August A. D. 1911.

CALEB M. PEELLE.

Witnesses O. LEON KIESELBAGI-I, TVVM. HAPPELL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

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