US1403178A - Safety fastener for sliding doors - Google Patents

Description

J. T. lViALLAHD.

SAFETY FASTENER FOR SLIDING DOORS.

APPUCAT|ON FILED MAR. 9| 1921- n l 39170 Patented Jan. w, 1922.

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J. T. MALLARD.

SAFETY FASTENER FOR SLlDING DOORS. APPLICMKIONFILED MAR. 9. 1921.

)1941;@3931780 Patented. Jan. 1051922..

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JVOHN T. MALLARD @Fllelillo SFETY FASTENER 'GR SEEDING. DORS.

Application filed March 9, 1921.

To all whom it may Concern:

it known that l, flor-iN Cllr-reims MAL. Lann, citizen of the United States, and resident olf Raleigh, in the county of llfake and fatato of llorth Carolina, have invented` certain new and useful lniprovenients in Safety Fasteners for Sliding` Doors, of which the following is description, reference being had to the accompanying drawings, which form a part oi: my speciiication lfly invention relates to improvements in safety fasteners for sliding doors, more par ticularly to the doors of railway baggage and express cars, and it also is applicable to various other types of sliding doors where it is desirable to prevent undue closing of the same.

rl`he wide side openings of railway baggage and express cars are provided with sliding doors the sudden undue closing ot which frequently causes serious accidents to messengers and baggagemen standing in the open door-ways when trains approach a station and are brought to a sudden stop causing the door to close suddenly, and which also occurs from other causes incig dental to the operation or r ,ilway cars.

The object of my invention is to provide a device for attachment to the door, whereby the latter when open cannot be closed except by rnanipulating` a lever which in turn operates a stop bolt adapted to engage perorations or receptacles therefor 'formed in the door frame or in a strip of iron or other material secured thereto.

With the aforesaid and other objects in view the invention consists in 'the various novel details ot construction and combination of parts hereinafter fully descril ed in the specications, illustrated in the drawings and more particularly pointed out in the claims.

ln the accompanying drawings 'forming part of the specilication, and in which like reference numerals indicate corresponding; parts, l have illustrated one form of device embodying` the essential features of my invention, although the same may be carried into eect in other ways without in the least departing from the spirit thereof.

ln the said drawings Figure l is a reduced iront view oi' the device applied to a door, the 'face member of the bolt casing and the door sheave being shown as a single structure and the door partially open.

Fig. 2 is a similar view to Figure l show- S'peciiication or Letters Eatent.

Serial Ilo. 450,851.

ing the bolt casing and the door sheave as separate units, the door being shown closed.

Fig. 3 represents a broken perspective view of the bolt casing separated from the door sheave and detached Jfrom the door, showing the lock bolt and its operating lever in their relative positions and a keeper-plate located thereabove, the latter being partly in longitudinal section in which an incline is shown adjacentto the bolt aperture.

Fig. l is a vertical cross section, taken on the line m a of Figure l, looking toward the front end orp the car, showing a modified form of door track in which stop perforations are formed in the horizontally disposed member thereof.

Fie', 5 is a vertical cross section taken on the line A A of Figure 2, looking toward the front end of car.

Fig. 6 is a longitudinal section through the center of the lock bolt casing showing a part oit the operating lever and its pivotal connection with the casing.

lt is to be noted that for the purpose of this application my invention is'illustrated and described in connection with the slid ing door of express car, one side of which is denoted by the numeral l.- 2 represents the side door opening and 3 the door, which is usually hung on a pair of door sheaves Ll-one only being shown-the rollers 5 oi1 which traverse a track 6 secured to the car above the door opening, and shown also, in modified torni, at Z in Figures l and 4l, it is to be understood, however, that my inventi n does not contemplate the use oi" any particular torni of door track nor of any special type or" door sheave and that it may be used in conjunction with any suitable 'forni ol type oi? either. S represents a lock boit ea. comprising two rimmed sections 81, S2 secured together by screws 9, l0, or they may be secured by any other convenient or desirable inea fi, the iace member oi secu S 1 is provided with end extensions 83, El* adapted to re eive screws for securing the casi in place. lllithin the chamber thus iorffned there is located a lock bolt 1l bifurea-ed and pivotally connected at one end with anoperating lever l2 by means of pintle i3, the lever being pivotally connected with the casing 8 by means oit a pintle la which 'i a, be formed integral with one oit the casing sections or it may be a separate piece secured to the casing section as more i shown in Figure 6, or any other suitthe lock bolt and in which the'l'atter has ver-A tical movement, the purpose of which will presently appear. The casing is recessed into the side of the door, adjacent toits'top horizontal edge and at vsuitable ldistance from the vertical edge thereof,so that theI face of the casingwill be flush with the side of the door. A stop strip or keeperplate of suitable material is secured to the underside of the door opening lintel and may comprise a separate unit, indicated vby the numeral y2O in Figures 2 and 5, or it may consist of an integral member of the door track as indicated by-the numeral 2l in Figure 1l, in either case the keeper is perforated, as at22, to receive the free end of the lock bolt 11 and when so engaged the door is held against undue `movement 'inv either direction, it being obvious that any desired number of such engagement may be provided for, also rthat when the door is closed and the parts referred to are in engagement a separate lock for the door may be dispensed with, entrance to and exit from the car being had through its end doors.

The free end of the operating lever 12 is pivotally connected, at 23, with the bifurcated `end of an operating bar 24;, the oppo.

site end of which terminates in a handle 25 whereby the bar may be raised and the upward movement of which'operates the lever 12 which in turn lowers the lock bolt 11 thereby releasing Ait from engagement with the perforation 22 in the keeper-plate and permitting of unobstructed movement of the door, the weight of the operating bar, when unrestrained, serving to force the .lock bolt into the perforations when their relative positions permit of engagement therewith.

To make more positive and to insure engagement of the lock bolt with the perforations in the stop strip or keeper-plate as the door moves forward towards a closing position inclines 26, see Figure 3, are formed in the said stop strip or keeper-plate at each perforation, up which inclines thepend of the lock bolt travels and is halted by the opposite wall ofthe perforation, thus avoid-v ing` failure to perform its intended function. The operating bar .is held in position by guide members 27-28 secured to the door and in which said bar is free tlc-moveA in a vertical line, its movement being limitedby the said guide members.

Reference has been made to a curved slot or opening 18 formed` in the face member of the section 81 of the casing, also to an aperture or bore 19 to receive the lock bolt formed in the upper rim of the casing while lockbolt will operate in whiclieverfset of said openings may be necessary tol adapt the devlcctoa right or a left hand dooras the case may be, thus contributing to expediency, veconomy and convenience in manufacture by avoiding the necessityvof separately constructing the device for right and left hand doors. y

In `Figures land fl `of the drawings rthe front section 81 of the lock'bolt lcasing and the face or supporting member 41 ofthe door sheave is `shown as comprising a single unit,` preferably a casting, and in Figures 2, 3 and 5 lthe door sheave and the'lockbolt casi-ng are shown *as rseparate units.

VJhile 'my inventionfper se is V.separate and distinct from and does not necessarily involve the use of any particular type of door slieave yet,where it is to be applied'to'new doors or to doors not previously mounted combining of the faceor supporting member of the door sheave with the face or front section S of the Vlock bolt casing'in la single unit contributes economy and convenience in manufacture, as well as'in the application of i the device tov a door. f

In the particular embodiment of my invention shown in j the "drawings, when the lock bolt is engaged with one of-its czmitingk stops7 or perforations, ithe door is yheld against movement in either di'rec'ti'on 'and the operating bar lis at rest at-its lowest limit of travel and raising of the bai-.to its Vhighest limit of travel withdraws theloc'k'bolt from such engagement and peri'nitsy of Lfree `movement ofthe doorin leitheropening or closing direction. i

It is obvious thatmy invention is equally well adapted yto cars o f wood or steel construction o'r 'of a combination ofwood and steel; Aand that vdetails of construction as herein shown and described' may be departed fr'oniin various particulars without in the least departing tion.

Vl. fina `safety fastener for sliding` doors,- the combination with Ya 'door of a casingv adapted ltol be vsecuredpto'l the door, lione'or morefstopsf secured 'to Ya 4support above Vsaid casing, anVK operating lever pivotally'mountp ed on said casing, a lock bolt inA pivotal confrom the spirit oi myinveny nection with one end of said lever and whose free end is normally in position to automatt cally engage the said stops during travel of the door, and a vertically disposed movable bar in operative connection with the opposite end of said lever; whereby raising of said bar will rock said lever causing withdrawal of said lock bolt from engagement with the stop and permit of unobstructed movement of the door while the said bar' is in a raised position.

2. In a safety fastener for sliding doors, the combination with a door of a casing` adapted to be secured to the door, a keeperplate secured to a support above said casing having one or more stop openings therein., an operating lever in pivotal connection with said casing, a lock bolt operative within and through said casing and being in pivotal connection with one end of said lever and whose free end is normally in position to automatically engage the said stops during travel of the door, a vertically disposed movable bar in operative connection with the oposite end of said lever; whereby raising of said bar will rock said lever causing withdrawal of said lock bolt from engage ment with the stop opening and permit of unobstructed movement of the door while said bar is in a raised position, and guide members secured to the door for controlling the vertical movement of said bar. l

3. ln a safety fastener for sliding doors, the combination with a door of a casing adapted to be secured to the door, a loclr bolt operative within and through a rim of said casing, an operating lever in pivotal connection with said bolt and with said casing, a keeper-plate located above said casing having one or more stop openings adapted to receive the free end of said lock bolt, an inclined surface leading from substantially midway of the depth of the opening to the bottom side of the keeper-plate and which inclined surface the end of the lock bolt travels to engage the opening, and means connected with said lever for operating the lool: bolt by the movement of said lever.

4. ln a safety fastener for sliding doors, the combination with a door of a casing adapted to be secured to the door, a lock bolt operative within and through a rim of said casing, an operating lever in pivotal connection with said bolt and with said casing, a keeper-plate located above said casing having one or more stop openings adapted to receive the free end of Said lock bolt, an inclined surface leading from substantially midway of the depth of the opening to the bottom side of the keeper-plate and up which inclined surface the end of the lock bolt travels to engage the opening, and a vertically disposed movable bar in operative connection with the opposite end of said lever adapted by a lifting movement thereof to rock said lever and release said lock bolt from locking engagement with said keeper-plate.

5. In a safety fastener for sliding doors, the combination with a door of a casing adapted to be secured to the door, a lever pivotally mounted on said casing, a lock bolt in pivotal connection with one end of said lever, a keeper-plate provided with stopopenings secured to a support above said casing; said openings being adapted to receive the free end of said lock bolt, and a movable bar in operative connection with and depending from the opposite end of said lever whereby the weight of said bar will cause the free end of said lock bolt to automatically engage said stop-openings and when held in raised position will disengage said bolt therefrom and permit of unobstructed movement of the door.

6. ln a safety fastener for sliding doors, the combination with a door of a casing adapted to be secured to the door, a lever pivotally mounted on said casing, a lock bolt in pivotal connection with one end of said lever, 1a keeper-plate provided with stop-openings secured to a support above said casing; said openings being adapted to receive the free end of said lock bolt, a movable bar in operative connection with and depending from the opposite end of said lever whereby the weight of said bar will cause the free end of said lock bolt to automatically engage said stop-openings and when held in raised position will disengage said bolt therefrom and permit of unob structed movement of the door, guide members secured to the door for controlling the vertical movement of said bar, and a handle formed on said bar whereby the same may be operated.

7. In a safety fastener for sliding doors, the combination of a casing adapted to be secured to a door and having a slot or opening through the outer face thereof, an operating lever comprising two parallel offset sections, formed by an angular section therebetween; one of said parallel sections being pivoted to and within said casing and the other being disposed outside thereof; the said angular section being operative in said slot or opening, a lock bolt in pivotal connection with the end of said lever within said casing, a keeper-plate secured to a support above said casing having provision for receiving the freeend of said lock bolt to arrest movement of the door, and means connected with the opposite end of said lever whereby said lock bolt may be withdrawn from locking engagement with said keeper-plate.

8. ln a safety fastener for sliding doors, the combination of a casing adapted to be secured to a door and having a slot or openlsaid casing, a keeper-plate secured to eenpport above seid easing having stop-openings 'forreoeving the free end or' 'said look bolt to arrest movement of the door, a` movable bar in operative connection with and depending from the opposite end 'of said lever; whereby the Weight of seid bar will cause the free end of seid lock'bol-t to automatically engage Said stop-openings and when held in raised position Will disengage Said bolt therefrom and permit of unobstructed movement of the door, guide members Secured tothe door for controlling the vertical movement of sedbar, and a handle formed on said her whereby the same may be open ated. f

In witness that I claim the foregoing 'I have hereunto Subscribed my vname this lst dey of March7 1921.

JoHN THOMAS MALLARD.

Vlitnessf R. T. HAMLET.

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