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US 4,227,724 AGranted
Security bar lock
AssigneeS.D.S. Industries, Inc.
InventorRobert L. Day
Life of this patent
Estimating the term…
Abstract
A security bar lock for a door is neatly encased in an elongated section of trim molding. The bar lock projects behind the edge of the door and is retracted therefrom. A sturdy but compact fulcrum pin mounting transmits heavy forces to the frame structure itself.
Claims14
In an apparatus for securing against entry by an unauthorized person, a building door hinged on one side of a door opening:
- (a) a door frame structure providing a flange faced to the inside of the door opening and located at a place past which the edge of the door swings;
- (b) an elongated bar lock;
- (c) means mounting the bar lock on said flange so that the bar lock substantially parallels the adjacent edge of the door opening;
- (d) said mounting means confining the bar lock for sliding movement substantially parallel to the plane of the door opening to project throughout its length over the said edge of the door and to retract to clear it;
- (e) said mounting means transmitting door opening pressure exerted on said bar lock to said frame structure;
- and
- (f) means determining stable open and closed positions of said bar lock.
4 more elements
In an apparatus for securing against unauthorized entry, a door hinged on one side of a door opening:
- (a) a door frame structure providing a flange faced to the inside of the door opening;
- (b) an elongated bar lock extending along the flange at a place past which the edge of the door swings;
- (c) means confining the bar lock for sliding movement substantially at right angles to the frame structure to project over the said edge of the door and to retract to clear it;
- (d) said confining means transmitting pressure exerted on said bar lock to said frame structure;
- (e) said bar lock including a plate in face to face contact with said flange;
- (f) said confining means including an elongated fulcrum member secured in spaced parallel relationship along said flange, and providing a space through which said bar lock plate is slideable.
3 more elements
In a metal door frame structure:
- (a) a plurality of substantially channel shaped frame elements cut to frame the two sides and the top of a wall opening;
- (b) a door hinged on one of the side frame elements;
- (c) said frame elements having flanges faced to the inside of the door opening and substantially flush with the inside door surface;
- (d) trim molding attached to said flanges, a section of trim molding along another of the frame elements being removed;
- (e) an elongated structural bar lock extending and slidable along the flange at the region of the removed trim molding section;
- (f) said elongaged bar lock having a series of guide apertures extending along the length of said bar lock and each elongated in the transverse direction;
- (g) a series of projections extending frontally of said flange and through the guide apertures of said bar lock;
- (h) a pin or rod extending through and mounted by said projections and overlying said bar lock to confine it for sliding movement against said flange;
- (i) said guide apertures determining alternate limited positions of said bar lock in which said bar lock is projected over the edge of the door and in which the bar lock is retracted to clear the edge of the door;
- and
- (j) a supplemental trim molding attached to said bar lock to conceal said bar lock and to provide a handle for operation of said bar lock.
8 more elements
In a door frame structure:
- (a) a plurality of substantially channel shaped frame elements cut to frame the two sides and top of a wall opening;
- (b) a door hinged on one of the side frame elements;
- (c) said frame elements having flanges faced to the inside of the door opening and substantially flush with the inside door surface;
- (d) trim molding attached to said flanges, a seciton of trim molding along another of the frame elements being removed;
- (e) an elongated spring steel bar lock plate extending along and slidable at the frame element flange at the region of the removed trim molding;
- (f) said bar lock having a series of substantially rectangular guide openings all parallel to each other and arrayed along the length thereof;
- (g) a backing plate extending behind the flange at the region of said bar lock plate, and having a series of knuckles extending through apertures in the flange to project frontally of the flange and through said guide openings, said knuckles having aligned openings;
- and
- (h) a fulcrum pin or rod extending through and mounted by said aligned openings of said knuckles and overlying said bar lock plate to confine it for sliding movement against said flange, said guide openings cooperating with said knuckles to determine transverse movement of said bar lock plate between opposite limited positions in one of which said bar lock plate is projected over the edge of said door and in the other of which said bar lock plate is retracted to clear said door.
6 more elements
In a door structure including:
- (a) a metal door frame defining a door opening for a building, said door frame having a flange faced to the inside of the door opening and generally paralleling the plane of the door opening;
- (b) a door fitted to the door opening;
- (c) hinge means located at one side of the door opening and attached to the corresponding side of the door for mounting the door for swinging movement;
- (d) a main door lock located at the opposite side of the door;
- the combination therewith of:
- (e) an elongated bar lock extending along the flange at a place past which an edge of the door swings;
- (f) means mounting the bar lock on said flange and confining the bar lock for sliding movement substantially parallel to the plane of the door opening retractably to project throughout its length over the edge of the door when the door is closed;
- (g) said mounting means transmitting to the metal frame structure door opening pressure exerted on said bar lock;
- and
- (h) means determining stable open and closed positions of said bar lock.
7 more elements
Dependencies are inferred from the claim text.