Abstract: A check rail lock having a housing with an interior space rotatably mounts a shaft connected to a handle and a cam and with stop members associated with the cam and the housing for limiting rotation of the cam between locked and unlocked positions. The cam is releasably held in either of these positions by mounting of a spring washer on the shaft to which the cam is fixed, and with the spring washer and the housing having coacting detent structure which releasably holds the cam in either the locked or unlocked position.

Abstract: A bolt fits slidably within a cylinder and is inserted in a drilled hole through a first slidable member to be interlocked. The bolt, under force of a coil spring within the cylinder, is forced into any of a series of aligned holes in a second member to be interlocked. A striker plate with aligned holes is attached to the second member and receives the end of the bolt as it slides until forced into a hole. A body is attached to the cylinder and the body is secured to the slidable first member to be interlocked. A D-spring on the body engages a D-spring notch on the bolt, locking the bolt in the projected position, thereby interlocking the two members. The body and handle, attached to the bolt, have flat surfaces which when aligned indicate that the D-spring is engaged to the D-spring notch. The handle must be rotated to disengage the D-spring and D-spring notch before the handle and bolt can be retracted.

Abstract: The invention provides a device for securing a window sash to the outer frame of the window so that, on the one hand the sash may be locked in a predetermined open position and on the other hand may be pivoted to open it fully. A single push-button serves both to disengage a catch in the predetermined open position and to release the sash for full opening.

Abstract: A sash lock for a casement window having a case with two sections of different height and with the lower level section having a top wall with a circular segment opening with a curved edge which receives a generally circular part of a rotatable operating member positioned in the opening and extending under a vertical wall interconnecting the two case sections of different height. The rotatable operating member has a curved edge of the same curvature as the curved edge of the case top wall opening as well as a peripheral flange underlying the curved edge of the top wall opening whereby in all rotative positions of the planar operating member the opening is effectively sealed.

Abstract: An improved casement window securement mechanism includes two cams, one handle, cam linkage and a cam and linkage supporting spacer. The spacer supported cam is a reaching cam including a cam ramp with a straight drawing portion, and cam center and over-center portions. The reaching cam draws a catch at a rate varying with the cam angle of rotation. The securement mechanism draws and positively secures a bowed or warped casement sash.

Abstract: A universal single hung window including a frame and at least one prime window sash therein movable in the plane of the frame and tiltable about the lower edge thereof out of the plane of the frame, whereby the window may be used as a single hung or a hopper window in one position thereof and in another position thereof may be used as a glider window. The window structure includes a thermal barrier between a prime window and a storm window. A pivot lock having an over center spring therein extends in one position thereof into the path of the one prime window sash to lock it in closed position. In another position thereof the pivot lock permits movement of the one prime window sash in the plane of the frame.

Abstract: A lock for a storm window, a catch of the lock being adapted to fit within a track along which a positionable window slides to a closed position. Spring biased latches on the positionable window are automatically biased by the catch away from the track and received by a recess in the catch, which recess retains the latch and prevents movement of the positionable window.

Abstract: A sash lock for sliding windows as for example in vehicles such as buses is provided. The lock has a minimum of moving parts (two), and great strength. The lock comprises a lock body having a projecting latch plate which is adapted to engage a slot in a track adjacent a sliding window. The latch plate has an upper unitary lip which is engaged by downwardly projecting members on the latch handle, and there is an associated spring normally urging the latch plate toward the slotted track. Pivotal movement of the handle, in either direction, causes the latch plate to be released from the slotted track so that the latch and its associated window may readily be moved along the track.

Abstract: A tilt latch for a window sash including a base member mountable on a sash and a slide member disposed for sliding movement in a channel formed in the base member and resiliently biased toward an extended position in which a nose-shaped first end of the slide member engages a window frame to prevent the sash from tilting out of the frame. A downward projection formed on a second end portion of the slide member interferingly engages an end edge of the base member to arrest movement of the slide member at the extended position, but this second end portion of the slide member is dimensioned to enable the projection to be lifted manually out of such engagement so that the slide member can be moved beyond the extended position.

Abstract: The window lock includes in combination a cylindrical barrel suitable for recessed installation and a special key for insertion and removal of the barrel from a window sash. The cylindrical barrel is fabricated of suitable length to seat within a bore drilled entirely through the lower sash and a portion of the upper sash of a double hung type window. The bore is drilled of sufficient depth to recess entirely the barrel so that there are no interiorly projecting or otherwise exposed parts. The barrel is interiorly formed with a recessed socket and the special key is provided to engage the socket for barrel removal purposes when it is desired to open the window.

Abstract: A lock for a horizontally sliding window including a base member attached to a window sill and a catch member slidably mounted on said base member for movement between a locked and unlocked position. The sliding catch member includes a window rail barrier portion for preventing horizontal sliding of a moveable window sash and a catch portion for preventing vertical movement of the slidable window sash to prevent removal of the entire window sash from the outside of a building.

Abstract: The apparatus includes a lock unit having dual eccentrics that are spring biased toward an opposing planar support flange. The lock unit is mounted so that a selected sidewall of a conventional sliding panel track is squeezed between the eccentrics and the support flange by the force of the spring. Slide stops extend from the support flange into the operative area of the track to prevent horizontal sliding movement of the panel. The apparatus further includes a lift stop which may be used in conjunction with the lock unit to prevent the sliding panel from being lifted clear of the lower track. It comprises a flat spring having a bias toward assuming a U-shaped configuration. The spring legs are spread so that the spring can be inserted into the upper panel track above the panel.

Abstract: A safety lock for window sashes and the like is provided which comprises a bolt and a locking and mounting sleeve adapted to be inserted in a drilled hole in the sash or other member to be interlocked, the sleeve and bolt being provided with detent means for releasably retaining the bolt in fully inserted locked position, a partially inserted locked position and in retracted unlocked position. The bolt has an enlarged head of substantially the same diameter as the sleeve and the sleeve is recessed in the drilled hole so that the head of the bolt lies flush with the outer surface of the sash or other member where it is inconspicuous and cannot be grasped for withdrawal, withdrawal from fully locked to partially inserted locked position requiring the use of a magnet. A modification of the end of the sleeve may be utilized for attaching the sleeve to the outer wall of a sash or other unit having a hollow interior.

Abstract: A pressure-sensitive lock for sliding windows and doors has rotatable eccentric cam means adapted to be mounted on the sash of a sliding window or door so as to engage the adjacent window frame when the cam means is rotated into the locking position. The lock also has a pressure block for mounting on the opposite side of the window adjacent the frame, such that when the cam means is placed in locking position against the frame, the sliding window is forced toward the opposite frame and the pressure block is thereby wedged against the frame to prevent the window from opening.

Abstract: A lock latch assembly for sliding closures (windows and patio doors) which is placed to limit the opening of such closures beyond an adjusted position and which prevents access through the closure opening. A simple integral notched plate as one element and a swiveled pin as a second element provides the structure, each held by fasteners which have substantially resistance in shear to any forcing of the closures.

Abstract: A latch assembly for use on a closure, e.g. a sash, the assembly comprising a housing from which a slidable, spring-biased latch bolt extends, an actuating handle pivotally mounted at one end in the housing for pivotal movement in a plane parallel to the plane of movement of the bolt and having an opposite end portion extending from a portion of the housing spaced from the portion of the housing from which the bolt extends and a pair of bolt-lifting levers pivotally mounted intermediate their ends within the housing, one end of each lever being engagable with the bolt and the opposite end of each lever being engagable by a projection on the handle intermediate its ends for withdrawing the bolt. When the handle is pivoted in one direction, one lever is engaged and lifts the bolt whereas when the handle is oppositely pivoted, the other lever is engaged and lifts the bolt. The levers are free to pivot when the bolt is pushed inwardly from externally of the housing.

Abstract: A window comprising a first sash, and a second sash movable relative to one another, and a window lock mounted on one of the sashes. The window lock includes a housing having an inner wall adjacent one sash and an outer wall. A block is fixed on the inner surface of the outer wall. A plunger is slidable in openings in the inner and outer walls and block. The opening in the inner and outer walls are circular. The opening in the block includes radial portions and the plunger has a radial projection conforming generally to the radial projection of the opening in the block. The other sash has an opening adapted to be engaged by the plunger such that when the plunger is in engagement with the opening in the other sash the other end of said plunger is spaced from the outer surface of the other wall. A knob is releasably engageable with the outer end of the plunger for engaging the plunger and moving it axially to unlock the sashes. A spring yieldingly urges the plunger toward the opening in the other sash.

Abstract: A safe and tamper-resistant lock assembly for sliding glass doors and the like for securely locking a slidable door in a closed or partially opened position. The lock assembly includes a specially configured bracket which is mounted upon the stationary frame assembly of the door unit. The bracket has an inverted J-shaped channel and an elongated wall defining a plurality of apertures including one aperture which is positioned to overlie an aperture in the slidable frame of the door when the door is in a closed position and another aperture which is positioned to overlie the aperture in the slidable frame when the door is in a partially opened position. A specially configured locking key is provided with a cylindrical shank having an arcuate locking cam for lockably engaging the inverted J-shaped channel of the bracket when the shank is inserted into the aperture in the slidable frame and into one of the apertures in the bracket.

Abstract: A window lock and, more particularly, a check rail lock which can be mounted in association with a double hung window having a center vertical muntin. The window lock has a casing housing a linearly movable locking unit with locking members having a locking notch at one end for engagement with catch means carried by the adjacent window sash, an operating unit with operating members movably mounted in the casing and movable between window unlocked and locked positions and with pin and slot structure interconnecting the locking members and the operating members with the casing whereby the locking members are guided in the linear movement thereof to an advanced position as the operating unit moves toward the locked position and the locking members are then raised into engagement with the catch means and withdrawn to tightly draw and lock the window sash together as the operating unit moves to the final locked position.

Abstract: A plate-like clip member is bent at one end and is positioned inside a window between parallel first and second units slidable relative to each other and fits over the edge of one of the units at its bent end. An elongated clamp member is bent at one end. The clamp member is positioned inside the window in operative proximity with the clip member and fits over the edge of the other of the units at its bent end. A fastening device releasably affixes the clamp member to the clip member inside the window thereby preventing relative movement of the members and the window units.