US 4,394,805 A · Escapable-window-security-guard system

Abstract

An escapable guard system includes means for securance of a grill having at each side thereof to be attached to a window frame or the like a channel with legs outturned; for co-acting with channels of this type a self-protective fastening system is provided which on unlocking provides instant full access to the window opening; the fastening system includes for one side of such a grill an angled guard latch which fits within a channel where it is secured by carriage bolts passing through respective square holes in the channel and into square holes in base members of this invention which the square under-portion of each rounded head of the carriage bolt type machine screw fits, leaving exposed only the featureless semi-spherical portion of the bolt head; this guard latch co-acts with a frame latch which covers the nuts on the carriage bolts when attached to a window frame and which can be locked to the guard latch by a padlock; for the other side of such a grill similarly secured hinge hooks are provided which have angled portions for detachably securing through openings in respective hinge catch plates in such manner that it is only necessary to unlock the grill to remove it entirely, if desired.

Claims4

Dependent claims

In a system having means for hinging and locking grills over openings at window frames and the like, the improvement comprising:

the means for hinging having means for fastening a said grill to a window frame, including means for freeing a said grill from a window frame on hingedly pivoting a grill to an open position relative to a window frame;
the means for locking having respective means for attachment to a window frame and to a said grill;
means for protecting all said fastening means from tampering when a said grill is hinged and locked to a window frame;
said means for hinging including:
a plurality of hinge hooks, said means protecting including each hinge hook having a first portion proportioned for fitting a recess in a side of a said grill, a second portion extending at an angle from the first portion and a third portion extending from the second portion in a direction generally parallel with the first portion, means for fastening each hinge hook to a said grill;
a respective hinge catch plate for each hinge hook, means for fastening, each hinge catch plate to a said window frame, each said hinge hook third portion passing through a slot in a hinge catch plate with the hinge catch plate covering the hinge hook fastening means and the hinge hook covering the hinge catch plate fastening means, and the means for freeing further including each hinge hook third portion proportioned for free withdrawal from a said hinge catch plate when a said grill is at said open position.

3 more elements

In a system having means for hinging and locking grills in place over openings at window frames and the like, the improvement comprising:

the means for hinging having means for fastening a said grill to a window frame, including means for freeing a said grill from a window frame on hingedly pivoting said grill to an open position relative to said window frame;
the means for locking including respective means for attaching to a window frame and to a said grill with respective means for securing together as by a padlock;
means for protecting said means for hinging and means for locking from tampering when a said grill is hinged and locked in place;
said means for fastening including:
a slotted member for fixing to a window frame, an elongate member for fixing to a grill, the elongate member having a free end proportioned for passing through said slot;
said slotted member and free end having an inclined relation, said means for freeing including the inclined relation preventing removal of said free end from said slot when a said grill is hinged and locked in place but permitting removal of said free end from said slot when a said grill is pivoted on the hinge means to a said open position relative to said window frame;
said means for protecting from tampering including the elongate member having a base portion, said inclined relation offsetting said base portion generally parallel with said free end in location providing for bolting the base portion in a recess in a grill with a portion of said slotted member covering said recess and preventing access to an end of a said bolt;
a carriage bolt and nut for bolting each of said base portion and offset base part to a grill;
said means for protecting further including each carriage bolt having a rounded head with a square underhead portion, and each of said base portion and offset base part having a square recess therein for retaining a said carriage bolt against rotation when a said grill is hinged and locked in place.

6 more elements

Dependencies are inferred from the claim text.

Escapable-window-security-guard system

Life of this patent

Escapable-window-security-guard system

Life of this patent

Abstract

Claims4