Abstract: A window securing device (36) for use in a double-hung sash window assembly having upper and lower sash window frames (14,16) installed for relative overlapping vertical sliding movement, said upper sash frame (14) having a recess into the interior of a vertical facial member of the window. The device (36) includes a housing (38) having a front faceplate opening (51) into a cavity (50) therein and a means for retaining the housing (38) in the recess with the faceplate (42) covering the edges of the recess. A pawl (40) mounted in the cavity (50) of the housing (38) is spring biased into an extended position where the lowermost arresting edge protrudes through the opening (51). In effect, the extended pawl (40) blocks the pathway of a top portion of the lower sash (16) for preventing further upward movement thereof.

Abstract: The invention provides a barbeque lid adjustment device including a shaft member attached to a movable lid of a barbeque grill or cooker and a rotatable elongate member. The rotatable elongate member includes an engagement section at one end for engaging a cooking bin of the barbeque grill or cooker and a handle section at a distal end for rotating the elongate member about an axis coincident with the shaft member. The elongate member is rotatably attached to the shaft member between the engagement section and the handle section and enables a user to adjust a lid of a barbeque grill with one hand to various partially open positions for controlled cooking.

Abstract: A hold open arm assembly for a non-vertically hinged door prevents a door for a roof or floor opening from closing unexpectedly and allows one-handed operation. The assembly includes an elongated arm that bears directly against a stop aligned with the axis of the arm when a closing force, such as a wind load, is applied directly to the door. The arm has a guide that engages a guide slot in a bracket attached to the door. The guide slot is tapered and widens near the stop. When a closing force is applied to a handle connected to the arm, the guide moves parallel to the guide slot and the arm clears the stop, allowing the door to close. When the closing force is applied to the door, and not the handle, the guide moves perpendicular to the guide slot so that the arm engages the stop. The guide is provided with a low friction roller bearing for smooth operation.

Abstract: The present invention relates to a door safety device for use in conjunction with a door that is pivotably mounted to a wall. The safety device comprises a base member that mounts to either the door or the wall, and an engaging member that movably mounts to the engaging member for movement between operative and inoperative positions. In the operative position, the engaging member prevents the door from being moved into the closed position thereof. In the inoperative position, the engaging member is positioned such that the door can be moved to the closed position thereof.

Abstract: A vehicle has a vehicle body with a tailgate rotatably secured to the vehicle body for rotation about a generally horizontal axis between a closed generally vertical position and an open generally horizontal position. A pair of relatively spaced first support members are secured to the vehicle body and the tailgate for supporting the tailgate in the open position. Two pairs of latches, each having a first latch element secured to the vehicle body and a second latch element secured to the tailgate, cooperate to have each first latch element engage the second latch element when the tailgate is in the closed position. A pair of removable elongated supplementary tailgate supports each have one portion removably secured to the first latch element and a second portion removably secured to the second latch element when the tailgate is in the open position. The supplementary tailgate supports are preferably substantially rigid and may be made of metal.

Abstract: An improved locking device for adjustable garment racks including an inner tube slidable in and out from an outer tube. The improved locking device includes a sleeve having a simplified locking tab for engaging and locking the inner tube in a position relative to the outer tube and a touch tab by which an operator may easily and safely manipulate the sleeve to an unlocked position for adjustment of the inner tube relative to the outer tube and again lock the inner/outer tube combination.

Abstract: A support (10) for the bonnet (6) of a motor vehicle (5) in which a plastic hinge member (11) is snap fitted into an elongate aperture (21, 22) in a structural member (20) of the motor vehicle (5). The invention therefore provides a simple and quick to fit support for the bonnet of a motor vehicle.

Abstract: A door holder assembly used to maintain a door in an opened position. The assembly is made up of a door stop, a locking plate mounted on the door and a floor mounted door holder. The door stop and the door holder are fixed to the floor while the locking plate is fixed to the lower portion of the door and is positioned to engage the door holder when the door is opened. The locking plate has two joined segments one of which is planar and flat while the other of which has a right angled groove. Depending on the vertical elevation of the door's bottom above the floor, the same locking plate can be mounted to the door in one of two different positions. If the elevation is slight then the right angled groove portion is mounted on the vertical front door surface. If the elevation is larger and sufficient space exists, the locking plate may have the right angled groove portion mounted to the lower edge of the door between the door and the floor.

Abstract: A latch that secures a closure member includes a bolt and a support member, with the support member attaching the bolt to a part, which could be a door frame. The support member is configured with head and shank portions, so that when the support member is tightened to the part, the bolt is free to rotate and slide about the shank. The bolt is held captive on the support member by a shoulder of the head, and a longitudinal slot in the bolt allows the bolt to rotate and slide about the shank. The bolt has a second slot with parallel sides that engage parallel flat surfaces of the support member head, thereby suspending the bolt in a horizontal closure locking position to allow unobstructed opening or closing of the closure member.

Abstract: A doorstop for use with swingable doors to prevent unauthorized entry into an area which includes a brace member pivotally connected to a base. The brace has an end for engaging the floor when the doorstop is in use. An angular orientation of the brace relative to the base is controlled by a lock bar having a T-shaped head connected by a shank to an enlarged inner end which is seated in non-rotational relationship to the base after being inserted in a first orientation through aligned slots in the base and brace member and then rotated to seat within the base.

Abstract: A restrictor device for limiting the degree of opening of an openable closure. The restrictor device has an arm (10) with a mounting plate (12) to pivotally mount the arm to either the closure or the frame on which the closure is mounted. The arm (10) is furthermore coupled to the closure or the frame as the case may be by a slideable element (16) to which the arm is pivotally coupled by a pivot (15). A movement restricting device is incorporated in the slideable element (16) whereby the movement of the slideable element can be selectively restricted.

Abstract: A door brace for bracing a door against a fixed object and for controlling the opening and closing of the door includes an elongate member of variable length, extendable and retractable between a first length and a second length; a first anchor means constructed and arranged to secure a first end of the elongate member to a door; a second anchor means constructed and arranged to secure a second end of the elongate member to a fixed object; and control means for forcefully extending the elongate member from the first and toward the second length. The door is at least partially open when the elongate member is at the first length, and closed when the elongate member is at the second length.

Abstract: A window latching arrangement for the first and second window portions of an operator's compartment of a work machine includes an access door housing the first window portion, first and second latching assemblies, each associated with the respective first and second window portions, and a plurality of lock and release mechanisms associated with the first and second window portions. The first window portion is pivotably connected to the access door for opening movement independent of the access door. The first and second window portions can open and pivot one toward the other and the first and second latching assemblies will engage and hold the window portions together until one of the latching assemblies is released.

Abstract: A glove box structure uses clip members fixed to a glove box slidably engaging arms that extend inwardly from a lid. Resilient cam surfaces in the clip members support beads on the arms for maintaining the lid in an open position. Resilient cam surfaces flex outward to allow slidable passage of the arms and the beads when the lid is moved between the open position and a closed position. The resilient cam surfaces return inward below the beads to support the lid in its open position until additional manual force is applied to close the lid.

Abstract: Vehicle including a body component and an additional body part, particularly a hatch door, which is movably mounted on the body component. The hatch door can be mounted on a power-assisted pivoting axis by means of a pneumatic spring or strut hinged by connection elements to form a pneumatic spring assembly. The vehicle has a component, particularly a trunk compartment cover, which moves simultaneously with an hatch door by means of a connection. The connection is mounted between the component and the pneumatic spring assembly.

Abstract: An upwardly pivotable vehicle lid is provided with a pneumatic pressure strut intermediate body and lid, as an opening drive for the pivot movement into a terminal position having a maximum pivot angle, with the extending movement of a piston rod out of the pneumatic strut cylinder defining the pivot angle being limitable in a plurality of positions ahead of the maximally possible pivot angle by an arresting device mounted outside of the cylinder. The arresting device includes an arresting member positioned on the cylinder of the pneumatic pressure strut and movable into frictional engagement with a complementary member movable by the piston rod of the pneumatic strut.

Abstract: A latching mechanism for a swinging door pivotally mounted on for movement about a first axis between fully open and closed positions includes a support column pivotally mounted for rotation about a second axis parallel to the first axis. One end of the support column is provided with a support block for supporting the door in the open position, and the other end of the support column is provided with a latching bar for securing the support column in a first position where the support block underlies an edge of the door in the open position. A cam surface is provided on the support column, engagable by the door as the door moves from the closed to the open position to rotate the support column and the support block to a position which permits the door to move to a fully open position without interference from the support column or the support block.

Abstract: A hood control apparatus comprises at least one counterbalancing spring engaged between a forward tilt hood and a top surface radiator frame mounted under the hood. The spring is chosen to have a spring rate such that, when the hood is opened, the spring supports the hood in an open equilibrium position less than fully open. A locking latch device is provided for latching the hood in the open position against unintended closure thereof.

Abstract: A door damper includes a base, an outer tube having one end rotatably received in the base, an inner tube retractably received in the outer tube, a contacting member disposed to the inner tube so as to contact an inner side of a door, an actuating member including a handle and an end plate which extend transversely from an end of the handle wherein the end plate inserted into and pivotally connected to the inner tube via a slot defined in the inner tube, and an actuating member eccentrically disposed to a free end of the end plate and rotatably received in an underside of the contacting member.

Abstract: A lid support releasably locks a casket lid in an open position relative to a casket body. A curved arm with a curved slot is pivotably connected at one end to the lid and the other end having a circular opening at the adjacent end of the slot. A follower has a stem disposed in the slot and is movable therein as the lid is moved between its open and closed position. A tubular boss coupled with the stem is adapted to enter the circular opening under the influence of a spring to releasably lock the lid in its open position. Upon depressing the stem against the bias of the spring, the boss is adapted to be withdrawn from the opening and the stem is adapted to enter the slot to permit the lid to be moved to its closed position.

Abstract: A door holder assembly for use with an associated electromagnet and an associated door having a pneumatic or hydraulic door closer mechanism mounted thereon which includes an elongated body having first and second axial portions. The apparatus includes a threaded member coupled to the first axial portion and to the second axial portion, the threaded member is coupled to one of the axial portions by mating threaded surfaces whereby relative rotation of the first and second axial portions varies the combined axial extent of the elongated body. The assembly further including a plate at one end of the elongated body and a base at the other end of the elongated body, the base and the plate are each mounted on the elongated body by means that allows relative angular movement therebetween. In some forms of the invention the first and second axial portions are disposed in telescoping relationship and each of the axial portions are cylindrical.

Abstract: A door securing device including an upper housing member being mounted about a door knob rose. The upper housing member encasing a locking mechanism with a trigger. A lower housing member is mounted to a lower door portion and has a bottom opening. The lower housing member has a rear wall with a pair of sprocket frames projection therefrom. A cable guard with a cable is coupled with the trigger. The cable guard is coupled with the upper housing member and the lower housing member. A door stop mechanism is housed within the lower housing member. The door stop mechanism has a stop wedge with a top side having a track, and a bottom side with a stopper. The door stop mechanism has a first sprocket member and a second sprocket member that rotatably coupled between the pair of sprocket frames. The first member capable of engaging the track. Included is a chain for engaging the first and second sprocket members.

Abstract: This invention relates to a door locking device that attaches to a door and can be used and stored easily. This invention further relates to a device that provides more support for hollow core doors. The construction of the device provides a leg having a slot which is received by a pin between two brackets. This construction allows for ease in use and storage while securing a door in a closed position.

Abstract: A trailer cover lift arm for assisting in opening a trailer cover and supporting the cover in an open position. The lift arm can include four elongate members each member having two ends pivotably coupled to define a member having parallelogram-like shape. First and second elongated gas springs can be disposed within the parallelogram member to assist an operator in opening, and supporting a trailer cover in an open position. The lift arm can be used to two-way tilt open a trailer cover.

Abstract: A prop device for assembly on a vehicle having a convertible top and a tonneau cover. The prop device is adapted to support a five bow of the convertible top in a suspended position. The prop device includes a mounting bracket adapted to be mounted on the tonneau cover and a pivoting arm attached to the mounting bracket at a first end thereof. The pivoting arm has a curved bow engaging portion at a second end thereof.

Abstract: A home security device comprising a first attachment device, mounted on a distal end of a first rigid arm, adapted to be removably secured to a door or window, a second attachment device, mounted on a distal end of a second rigid arm, adapted to be removably secured to a floor or wall adjacent to the door or window, proximal ends of the first and second rigid arms positioned end to end forming a substantially straight line, and a fastening device, releasably holding the proximal ends in position, adapted to remain secure against force exerted at the distal ends of the rigid arms and to release the proximal ends from position in response to force exerted near the proximal ends and substantially perpendicular to the axis of the rigid arms.

Abstract: A door stop includes a mounting bracket for mounting to a swingable door, a base which is connectible to the mounting bracket, and a leg pivotally connected to the base and having an end for engaging a floor in an operative condition of the door stop. In one embodiment, the mounting bracket is detachably mountable to doors of different thicknesses and the base is detachable from the mounting bracket so that the door stop can be disassembled when not in use, and the base can be used with alternative mounting brackets. The base is preferably vertically adjustable relative to the mounting bracket and the leg can be releasably locked in a range of different angular positions. The door stop may optionally not include a mounting bracket with the base being attached directly to the door.

Abstract: A roof window has a locking device (1) for locking the sash (4) in open positions relative to the casing (3); a device for opening the sash including spring arms (2) extending at a right angle to the window casing (3) at least in the closed condition of the roof window, and the spring arms (2) support the window sash (4) on said casing (3) in the open position thereof, the spring arms (2) are operatively connected both to the casing (3) and the window sash (4) by pivot bearings (5, 6), and one of the pivot bearings (6) is disposed on a spring-operated slide (8) movable in a guide (7). The slide being lockable by the locking device (1) which is operatable by a handle (9, 9').

Abstract: The invention relates to an apparatus which automatically locks the hood of a vehicle in a position which allows access to the engine. The invention includes a swing arm which is spring loaded and pivotally connected to the support structure of the vehicle, like the vehicle frame, near the hood hinge and away from the engine. When the hood is opened and the hood hinge pivots, the swing arm automatically follows the hood hinge until the swing arm reaches a position which prevents the hood hinge from pivoting in a direction which would result in the hood closing. In this way the invention automatically locks the hood to prevent premature hood closure which could injure the driver or maintenance personnel.

Abstract: An improved doorstop provides increased safety along with the simplified operation over previous doorstops. The doorstop is adapted to be mounted directly to the door in close proximity to an immovable surface such as the floor or a door channel. The device includes a frictional contact member which is leveraged from a first position away from the immovable surface to a second position in frictional contact with the surface. The improved doorstop is useful on sliding doors as well as hinged doors.

Abstract: A collapsible strut for connection between a first member and a second member mounted on the first member.

Abstract: This is a retaining device for locking pistons that have retractable sliding arms. The retaining device has a first ring portion having interior, exterior, and two end surfaces with screw receiving areas. A receiving area for a holding screw extends from the interior surface to the exterior surface of the first ring portion. A second ring portion also has interior, exterior, and two end surfaces with screw receiving areas. The ring portions are assembled through use of screws to form a collar. A holding screw with a handle, sized to be threaded into the receiving area of the first ring portion, locks the retaining device onto the piston arm.

Abstract: A casket cap brace support comprises a support bracket adapted to be affixed to a wall of the casket body and including an aperture therethrough adapted to receive an end of a brace member, an elongated brace member having one end pivoted to the cap and the other end received in the support bracket aperture, the other end having a projection thereon, the support bracket having an elongated slot therein with a terminal end, the brace member projection being received in the slot during at least a portion of the movement of the cap to and between the closed and open positions, the slot being so configured such that when the cap is in the open position the brace member is in compression, the brace member projection residing in the slot terminal end and being prevented from moving out of the slot terminal end by the action of the weight of the cap, the cap thereby being resistant to inadvertent closing in the event that the casket cap or body is accidentally bumped.

Abstract: A device for holding a door upright for painting comprises a bracket that attaches the device to the electrical junction box in a ceiling, a telescoping rigid section held by the bracket, and a pin at the end of the rigid section that engages the top edge of the door. The telescoping rigid section adjusts to different door sizes and different ceiling heights. It also moves to a retracted position from an extended position, so that the door can be easily positioned and removed. In the vertical position, only slight force is needed to hold the door there, force provided in part by the attachment of the device to the junction box. Use of the junction box obviates the need for more elaborate support systems.

Abstract: A retaining assembly includes a hollow casing mounted on a door. The casing has a horizontal wall portion formed with a through-hole and an upright rotary shaft which has an end portion that extends out of the casing through the wall portion and which is rotatable relative to the casing. A coupling rod has a first end portion connected pivotally to a door frame and a second end portion connected to the end portion of the shaft so as to, drive rotatably the shaft in a first direction when the door moves relative to the door frame to an open position. A pin has an end portion which is normally biased to extend out of the casing via the through-hole. An elongated positioning plate has a first end portion and a second end portion which is coupled releasably and selectively to the end portion of the shaft such that the first end portion is displaced by a variable initial angle, corresponding to the open position, with respect to the pin when the door is in a closed position.

Abstract: A hinge type drop-leaf support includes a table hinge plate, a leaf hinge plate, and a slotted strut. Both the table hinge plate and the leaf hinge plate are hingedly coupled to each other and each are provided with respective depending legs. One end of the strut is hingedly coupled to table hinge plate leg and the other end of the strut is provided with an L-shaped slot. The leaf hinge plate leg is provided with a pin which engages the L-shaped slot. The L-shaped slot and the depending legs are dimensioned so that the use of a detent is obviated. If desired, a coil spring may be provided at the hinged coupling of the strut and the table hinge plate leg to bias the strut in a downward direction. The L-shaped slot has a long portion and a short portion which form an angle between them which is preferably acute.

Abstract: A washing machine has a door mounted for rotation between open and closed positions. An electrical solenoid is connected to the door by means of a wire so that when the wire is pulled by the solenoid, the door is opened from a closed position, or closed from an open position. A torsion spring is connected to the door for storing energy while the door is being opened or closed, and then releasing the stored energy to maintain the door in the open or closed position. The wire is flexible to enable the door to be manually opened without actuating the solenoid.

Abstract: A tumbler is pivotably mounted in a sash lock housing. In an extended position, an end of the tumbler limits movement of a window sash. A post in the housing extends through an eccentric bore in the tumbler. The bore defines a shelf or protrusion that urges the tumbler into engagement with the housing, thereby preventing over-rotation of the tumbler in the extended position. A spring urges the tumbler toward the extended position and cooperates with the protrusion to urge the tumbler into engagement with the housing.

Abstract: An automotive adjustable truck lock device for a trunk lid of a trunk at a rear deck of an automobile, including a structure for maintaining the trunk lid in an open locked position, if a large article is placed in the trunk prevents the trunk lid from completely closing down on the trunk.

Abstract: This invention is a spring-loaded door-closing device consisting of a section (1) having a longitudinal cavity (2) in the lower part which houses and allows a moving tube (15) attached to a pressure hook (16) and a reaction spring (18) to slide within. In the upper part of the section there are one or more longitudinal channels (5, 6), and one or more brackets (13) equipped with a structure for moving along, and fixing to, the channels (5, 6). The brackets have components for fixing them to the under part of a vehicle floor in such a position where they can hold open, when activated, the vehicle door, or doors.

Abstract: A retractable door or window stop member includes a barrel which defines a recess in a top surface. A spigot is pivotable about a first axis extending transversely of the recess. An adjustment means enables the spigot to be pivoted between its first and second positions. A spring means is in the recess and acts between the spigot and the barrel to urge the spigot to and thereby tending to positively retain the spigot in its first position. The spring means is secured in relation to the barrel between the first axis and the second axis at each of the opposite sides of the recess, the spring means having an intermediate position which extends towards the first axis and which engages a protrusion on the underside of the spigot to thereby urge the spigot to its first position.

Abstract: A counterbalance device for a mail processing system includes a cover; a base; a support arm fixedly mounted to one of the cover and the base and articulately mounted to the other of the cover and the base such that the cover and the base pivot relative to each other; a device for counterbalancing the one of the cover and the base to create a predetermined force profile throughout a full range of pivoting movement of the one of the cover and the base from a closed position to a fully opened position relative to the other of the cover and the base. The predetermined force profile represents the net force acting on the one of the cover and the base at each point in the full range of pivoting movement.

Abstract: There is disclosed a device for limiting the swinging of a door hingedly connected to a second wall adjacent to the first wall. The device includes a bracket adapted to be mounted on the door hinge for swinging about its axis, as well as first and second arms pivotally connected to the bracket for swinging toward and away from the door and adjacent wall, respectively. A strut extends between the arms to limit swinging the first arm toward the second arm when the second arm is against the second wall, and one end of the strut is movable away from a stop on the second arm to permit the door to be opened and/or the arms to be stored next to one another.

Abstract: A security door bar safety device elongated rod has a main extension portion having a distal end insertable within a hole within a floor adjacent to the door, and an arcuate handle end at a proximal end of said main extension portion. The arcuate handle end has extending downward therefrom a further partial extension, which is rotatable within a ferrule bar sleeve portion mounted adjacent to said door. The further partial extension portion is movable rotatably about the extension portion within the ferrule sleeve from a position of non-use to a locking position, wherein the main extension portion extends vertically parallel to said further partial extension portion.

Abstract: A security bar system for use on both "inward" and "outward" opening doors that provides security by preventing forcible entry. The system preferably comprises an elongated, telescoping, bar arranged to extend horizontally across and adjacent to a pair of double doors. Inward opening doors are secured by mounting the security bar on opposing hinges, modified by incorporating docking ferrules into which right angle mounting dowels existing at each end of the reinforcing bar can be securely inserted, effectively barricading the doors closed. For outward opening double doors, where the hinge pins are typically located on the outside, door jamb mounting brackets in lieu of hinge mounted docking ferrules, are securely fastened to both sides of the door jamb material on the interior at approximately the same height as the door knobs.

Abstract: A pneumatic spring is equipped with a shell tube (12) which is telescopically guided on a pneumatic-spring cylinder (9) and which can snap into different positions. For bolting between the shell tube (12) and the pneumatic-spring cylinder (9), a bolt body (16) is attached to the cylinder bottom (17). In the bolt body (16), a bolt (18) is spring-loaded by a resilient force directed radially outward. In order to bolt the pneumatic-spring cylinder (9) relative to the shell tube (12), the bolt (18) engages in various breaches (19a and 19). Finger pressure required to release the bolting depends on which one of the two relative-shift directions between the pneumatic-spring cylinder (9) and the shell tube (12) is intended. (FIG.

Abstract: A hood prop rod assembly 16 which includes a secondary latching assembly 30 mounted upon the housing 32 of a primary hood latch assembly 24. The housing 32 of the hood latch assembly 24 is utilized to pivotally mount a jaw-type latch member 70 for engaging a catcher 28 mounted on a prop rod 26, which extends through the latch housing 32. The primary latch housing 32 is simply modified to provide for passage of the rod 26 through the housing for supporting the rod in the hood open position and for guiding its movement between that position and the closed position.

Abstract: A door stop adapted for a mounting adjacent a lower edge of a door at a location remote from the hinge, such door stop functioning to prevent an intruder from pushing the door open. This door stop comprises a mounting device adapted to be secured in a fixed position adjacent the lower edge of the door, and an elongate, rigid member operatively associated with the mounting device. One end of the elongate, rigid member has an aperture, enabling it to be pivotally mounted to the mounting device, and the other end of the elongate, rigid member has a component adapted to move, at the behest of the user, into contact with the floor. The elongate member is selectively movable between a raised, substantially vertical storage position residing close to the door, and an active, downwardly angled position in which the other end is in firm contact with the floor. I advantageously utilize a spring bias arrangement serving to hold the other end of the elongate member in such position of firm contact with the floor.

Abstract: A door-stop alarm has a frame adapted to be affixed to an inside surface of a door, and a rotatable lever carried on the frame rotatably movable between a position engaging a floor surface and a position away from engagement with the floor surface. Means for are provided for translating rotational movement caused by slight opening of the door to upward movement of one end of the rotatable lever. An alarm switch is provided within the frame, and a projection on the rotatable lever engages the alarm switch upon upward movement of the rotatable lever. The rotatable lever comprises a portion to engage the alarm switch for turning the alarm circuit on and off when the lever is rotated to a position away from the position engaging the floor surface.

Abstract: A security lock for a double-hung sash window assembly which is to be mounted in a stile of a sash frame to limit movement of a lower sash frame relative to an upper sash frame. The lock includes a casing adapted to be mounted within a recess formed in the upper sash frames, and a faceplate on the casing having an opening therein communicating with an interior casing cavity. A tumbler pivots in the cavity and is spring biased by a leaf spring to normally project through the opening to engage the lower sash in a locking position. The leaf spring is mounted completely within the casing cavity normally to bias the tumbler into its extended, locking position, but permitting the tumbler to be completely retracted within the casing cavity so that the lower sash frame can be raised and moved past the tumbler. The tumbler and casing wall include interlocking protrusions to prevent over-rotation of the tumbler during engagement with the lower sash frame. The lock can be supplied as an assembled unit for installation.