US3656788A - Double door security bolt assembly - Google Patents

Abstract

A high strength security bolt assembly for double doors of commercial establishments and the like affords security on both sides of the door when in the active locking position bridging both door leaves. The device features separate self-contained assemblies which are mounted with through bolts on each door leaf and a sliding locking tube which spans or bridges components of each assembly when in the active locking position. The assemblies are reversible to accommodate any arrangement of active and inactive door leaves.

Description

United States Patent Emery 4 1151 3,656,788 1451 Apr. 18, 1972 [54] DOUBLE DOOR SECURITY BOLT ASSEMBLY [72] Inventor: William L. Emery, PO. Box 6058, Corpus Christi, Tex. 7841] 221 Filed: July3l, 1970 211 Appl.No.: 59,939

[52] U.S. Cl ..292/148, 49/366, 292/259 [51] Int. Cl. ..E05c l/04 [58] Field of Search ..292/148, 147, 145, 259, 1, 292/DlG. l7; 70/DlG. 64, DIG. 65; 49/383, 394,

[56] References Cited UNlTED STATES PATENTS 1,506,310 8/l924 Klaus ..49/367 X 2,613,970 10/1952 Holmsten ..-....292/l48 Hollyday ..70/212 X 3,211,493 10/1965 Mandel ..49/3s3x FOREIGN PATENTS OR APPLICATIONS 614,146 12/1960 Italy... .......292/147 616,993 1/1949 Great 13111616....

Primary Examiner-Albert G. Craig, Jr. Attorney-B. P. Fishbume, Jr.

57 I ABSTRACT A high strength security bolt assembly for double doors of commercial establishments and the like affords security on both sides of the door when in the active locking position bridging both door leaves. The device features separate selfcontained assemblies which are mounted with through bolts on each door leaf and a sliding locking tube which spans or bridges components of each assembly when in the active locking position. The assemblies are reversible to accommodate any arrangement of active and inactive door leaves.

3 Claims, 6 Drawing Figures PATENTEIJAPR 18 M2 mar- INVENTOR WILLIAM L. ENERY 1 DOUBLE DOOR SECURITY BOLT ASSEMBLY The need for the invention arises in connection with adequate security for thedoors of industrial plants and stores which are being burglarized with increasing frequency. Usually, well concealed side and rear doors of such establishments are forced'at night by burglars to gain entry. Frequently the doors involved are double doors and the present invention has been devised to offer maximum security at minimum cost to such double doors by means of a simplified locking structure which is easy to install and requires virtually no main- 7 tenanc'e or adjustment after installation. The invention is in r the nature of a kit which includes two basic assemblies each mountable as a unit on the interior side of one leaf of the double door structure. Each assembly includes a main frame or mounting bar upon which the other components are mounted. Because of this, the individual smaller components cannot be misplaced, misaligned or improperly assembled and the very minimum of labor is involved in installing the device. While the device is customarily installed on the interior of the door, it has the capability of securing the door against unauthorized opening from the exterior or the interior.

Other important features and advantages of the invention will be apparent during the course of the following descriptron.

BRIEF DESCRIPTION OF DRAWING FIGURES DETAILED DESCRIPTION OF PREFERRED EMBODIMENT ,Referring to the drawings in detail wherein like numerals designate like parts, the numerals l'and l1 designate, respectively, the active and normally inactive door leaves of a double door closure for an industrial establishment or the like, the

hinges for the two leaves being indicated at 12 in FIG. 3. The

door leaves are hinged to a suitable frame structure which includes opposing vertical jambs 13 which may be metal box sections, as shown. The door structure and framing may be entirely conventional and the invention in fact is applicable to virtually any standard door structure with proper size modification.

The security bolt or door locking device proper forming the subject matter of the invention comprises a pair of assemblies 14 and 15 mountable bodily on the active and inactive door leaves 10 and 11, respectively. The assemblies 14 and 15 are similar but not identical and each embodies a base mounting plate 16 and 16' upon which the other components are conveniently mounted, as will be described. The plates 16 and 16 are secured in proper alignmentto the interior faces of the door leaves 10 and 11 by sturdy through bolts 17 which may be peened or staked securely after the application of nuts thereto. As shown, the base mounting plates 16 and 16' span substantially the entire width of the double door closure.

The plates 16 and 16 have securely welded thereto spacer bars or webs 18 substantially coextensive therewith lengthwise and located at the transverse center of the mounting plates and projecting above the same. Relatively stationary guide tubes 19 and 19', preferably square in cross section as shown, are welded to the webs l8 and are rigid therewith and these guide tubes are in accurate axial alignment on the two door leaves 10 and 11 when the latter are closed. As shown in the drawings, there is a slight gap 20, FIG. 2, between the assemblies l4 and 15 including a gap between the ends of the relatively stationary guide tubes 19 and 19.

locking tube or bolt 21 in the form of a slightly larger openended square cross section tube having a slot 22 in its interior side to receive the web 18 with clearance. The locking tube 21 may be equipped near one end with a gripping handle 23 welded thereto, as shown, for added convenience. The handle is an optional feature. The tube 21 is freely shiftable longitudinally between the bridging or locking position of FIGS. 1 and 3 to the inactive unlocking position shown in F IG. 2 where the locking tube is completely disengaged from the guide tube 19 on the door leaf I0.

The slidable locking tube 21 is equipped at one end with an upstanding apertured lug 24 on its top adapted to align with an L-shaped locking bracket 25, welded to the upper edge of the mounting plate 16 and overhanging the top of the assembly, as shown clearly in FIG. 4. The apertures of the two elements 24 and 25 are aligned when the tube 21 is in the locking position to receive the shackle of a first padlock, not shown.

At its opposite end, the sliding tube 21 carries a depending vertical apertured lug 26 welded thereto and projecting somewhat beyond the adjacent end of the tube 21 and being secured to the bottom wall of the tube 21 near one side thereof, FIG. 6. A coacting apertured plate or lug 27 is welded to the adjacent side of the relatively stationary guide tube 19 so as to lie opposite to the lug 26 when the tube 21 is shifted to the locking position, FIGS. 1 and 3. The element 27 also serves as a positive stop for the tube 21 in the locking position so that the apertures in the elements 24 and 25 and 26 and 27 will register to receive padlock shackles, not shown. A second padlock is employed to lock the elements 26 and 27 together. At this time, the locking tube 21 bridges the gap 20 between the two assemblies 14 and 15 and securely locks the two door leaves 10 and 11 against swinging on their hinges. Substantial portions of the two guide tubes 19 and 19 extend into the locking tube 21 from opposite ends, FIG. 3, to render the assembly very rigid against bending.

For further security, short bolts 28 are welded into the outer ends of the guide tubes 19 and 19' so as to enter openings provided in the jambs 13 when the door leaves are closed. As shown in FIG. 3, these bolts are tapered slightly so that they will not bind when the leaves swing open. The bolts 28 prevent forcing of the door leaves 10 and 11 inwardly or outwardly adjacent the jambs. v

It should now be clear in view of the drawings and above description that a simplified, compact and extremely sturdy locking unit for double doors is provided. The unit involves separate assemblies for the two door leaves and a sliding locking tube which is common to the assemblies and bridges the gap between the same in the locking position. Provision is made for double-padlocking the sliding tube in the locking position and a positive stop accurately positions the sliding tube to receive the two padlocks. Also, means in the form of the bolts 28 assure that the door leaves cannot be forced adjacent their hinges. I

It is to be understood that the form of the invention herewith shown and described is to be taken as a preferred example of the same, and that various changes in the shape, size and arrangement of parts may be resorted to, without departing from the spirit of the invention or scope of the subjoined claims.

I claim:

l. A security bolt assembly for double leaf hinged doors comprising a base mounting plate rigidly secured to one face of each door leaf and extending substantially thereacross horizontally, a relatively narrow web secured to each base mounting plate and projecting outwardlythereof and being substantially coextensive lengthwise therewith, a rectangular cross section bar forming a guide rail rigid with each web and substantially coextensive lengthwise with the web and maintained spaced outwardly from the adjacent base mounting plate by the web, each bar extending substantially equidistantly above and below the web and having horizontal faces above and below the web, a bridging locking member in on at least one of said bars.

2. The structure of claim 1, and a pair of apertured lugs on the bridging locking member near the opposite ends thereof adapted for padlocking with a pair of stationary apertured lugs adjacent to said bars.

3. The structure of claim 2, and rigid bolts on the outer ends of said bars adapted to enter openings of adjacent door jambs when the door leaves are closed and lie in a common plane.

Claims (3)

1. A security bolt assembly for double leaf hinged doors comprising a base mounting plate rigidly secured to one face of each door leaf and extending substantially thereacross horizontally, a relatively narrow web secured to each base mounting plate and projecting outwardly thereof and being substantially coextensive lengthwise therewith, a rectangular cross section bar forming a guide rail rigid with each web and substantially coextensive lengthwise with the web and maintained spaced outwardly from the adjacent base mounting plate by the web, each bar extending substantially equidistantly above and below the web and having horizontal faces above and below the web, a bridging locking member in the form of a rectangular cross section slotted tube slidable externally on both of said bars and being retractable bodily onto one bar so as to be completely separated from the other bar, said webs engaging through the slot of said tube and the slot being disposed on the interior side of the tube in opposing relation to the base mounting plates, and alignable elements adapted to be padlocked on the bridging locking member and on at least one of said bars.

2. The structure of claim 1, and a pair of apertured lugs on the bridging locking member near the opposite ends thereof adapted for padlocking with a pair of stationary apertured lugs adjacent to said bars.

3. The structure of claim 2, and rigid bolts on the outer ends of said bars adapted to enter openings of adjacent door jambs when the door leaves are closed and lie in a common plane.

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