Abstract: A door lock set includes: an outer lock held in an outer trim plate on an outside surface of a door, a latch device for locking the door on a door frame, an inner reinforced retaining member fastened with the outer lock and retained on an inside surface of the door, an outer reinforced retaining member fastened with the inner reinforced retaining member across the door, an inner trim plate having an inner knob or handle rotatably or pivotally held on the inner trim plate fastened to the inner reinforced retaining member and retained on an inside surface of the door; and the outer lock fastened to the inner reinforced retaining member for retaining the outer trim plate on the outside surface of the door for providing a door lock set easily assembled but difficultly damaged.

Abstract: A door lock assembly having a first escutcheon assembly for mounting a latch mechanism. The escutcheon includes a plate having a through-hole, first and second post mounts formed on an inward facing side of the plate outside the through-hole, and first and second removable posts that are removably coupled to the first and second post mounts, respectively, such that they are removable without permanent alteration to the escutcheon. The latch mechanism includes a shaft coupled with the bushing, a torsion spring having two distal ends for centering an angular position of the, wherein the two distal ends rest against a stop formed on the inward facing side of the escutcheon, and wherein at least one distal end is engaged with the off-centered protrusion of the bushing. The bushing may also include an ear protruding radially for engagement with a penannular portion formed in the through-hole of the escutcheon.

Abstract: A door lock assembly includes a rose having a peripheral flange which has a recess defined therein. A handle is connected to an outer surface of said rose and a mounting plate is connected to said inner surface of said rose. A lock device is located between the rose and the mounting plate. Two retaining members extend from an inner surface of said rose and two engaging members extend from said mounting plate. The engaging members are force-fitted to said retaining members. The mounting plate has a groove defined therethrough so that the lock device is engaged with said groove and a latch is connected to said lock device and extends through said recess of said peripheral flange.

Abstract: A door latch operator mount comprises a coupling member and a bearing member. The coupling member includes a plurality radial flanges and an integral resilient arcuate tab member projecting angularly outwardly of the outer surface of the coupling member. The coupling member is mounted to a door for receiving the bearing member. The bearing member has an opening for rotatably receiving a shaft of the latch operator. The bearing member also includes a plurality of flanges and an arcuate channel which tapers in depth. When the bearing member is positioned against the coupling member, the distance of the bearing member flanges from the surface of the coupling member is less than the distance of the coupling member flanges form the surface. The tab member is received in the deeper portion of the arcuate channel.

Abstract: A dummy lockset includes a rose liner, an exterior sleeve and a retainer for retaining the sleeve on the rose liner. The exterior sleeve 14 extends through an aperture in the rose liner and is held in place by the retainer. A stop plate with a self-tightening mechanism engages the exterior sleeve to automatically align a handle coupled to the sleeve.

Abstract: A dummy trim comprises a mounting plate to be fixed to a door, a spindle holder mounted to the mounting plate and including a peripheral wall, a spindle including a first end mounted in the peripheral wall of the spindle holder, and a lever securely attached to a second end of the spindle to move therewith. The first end of the spindle includes a slot having an edge facing the lever. The peripheral wall of the spindle holder includes an integral stop extending into the slot of the spindle and abutting against the edge of the slot.

Abstract: A door lock assembly includes a rose having a peripheral flange which has a recess defined therein. A handle is connected to an outer surface of said rose and a mounting plate is connected to said inner surface of said rose. A lock device is located between the rose and the mounting plate. Two retaining members extend from an inner surface of said rose and two engaging members extend from said mounting plate. The engaging members are force-fitted to said retaining members. The mounting plate has a groove defined therethrough so that the lock device is engaged with said groove and a latch is connected to said lock device and extends through said recess of said peripheral flange.

Abstract: A door lock assembly having a first escutcheon assembly for mounting a latch mechanism. The escutcheon includes a plate having a through-hole, first and second post mounts formed on an inward facing side of the plate outside the through-hole, and first and second removable posts that are removably coupled to the first and second post mounts, respectively, such that they are removable without permanent alteration to the escutcheon. The latch mechanism includes a shaft coupled with the bushing, a torsion spring having two distal ends for centering an angular position of the, wherein the two distal ends rest against a stop formed on the inward facing side of the escutcheon, and wherein at least one distal end is engaged with the off-centered protrusion of the bushing. The bushing may also include an ear protruding radially for engagement with a penannular portion formed in the through-hole of the escutcheon.

Abstract: A door lockset comprises a transmission assembly comprising a chassis with two through-holes, an outside handle assembly, and an inside handle assembly. The outside handle assembly comprises an outside handle, an outside rose, and an outside rose liner. The outside rose liner has at least two pairs of diametrically disposed positioning holes selectively aligned with the through-holes of the chassis. The outside rose liner further includes two engaging posts each having a screw hole. The inside handle assembly comprises an inside handle, an inside rose, and an inside rose liner. The inside rose liner includes two holes aligned with the screw holes of the engaging posts.

Abstract: An auxiliary lock structure includes a housing seat and a base plate each provided with a positioning hole for allowing a positioning member to be fixed to a door plate. The housing seat is provided with a protruding ring mating with a hole of the door plate. A pivot shaft rotatably passes through the central hole of the base plate and the axial hole of the housing seat. The central hole of the base plate has a periphery provided with protruding lugs. The pivot shaft is fitted with a control piece and an elastic member. The control piece is urged by the elastic member, so that the recesses of the control piece mate with the protruding lugs of the base plate so that the rotation knob can be positioned when its rotation stops.

Abstract: A lever handle structure includes a fixed disk defining an axial hole and having a first side provided with a positioning. catch piece, a driving axial tube rotatably mounted in the axial hole of the fixed disk and having a first end defining a guide slot and an annular groove, a lever handle secured on the driving axial tube for rotating it, a positioning catch ring having an inner wall provided with two lock blocks each secured in the guide slot of the driving axial tube and an outer wall defining an arcuate limit recess receiving the positioning catch piece and having two distal ends each formed with a stop wall for limiting rotation of the driving axial tube, an elastic member secured on the driving axial tube and rested on the positioning catch ring, an actuating ring secured on the driving axial tube and rested on the elastic member, and a positioning member secured in the annular groove of the driving axial tube for preventing detachment of the actuating ring.

Abstract: A door lock includes a main body having a transmission assembly and a positioning assembly. The positioning assembly includes an inside seat and an outside seat. An inside rose liner is mounted around the inside seat. An inside rose is mounted around the inside rose liner. An anti-torque ring is mounted around the outside seat and includes two positioning posts projecting therefrom. An adjusting sleeve includes an inner threading that is engaged with the outer threading of the outside seat. A first end of the adjusting sleeve includes two diametrically opposed cutouts, thereby defining two sector wings each having two end faces. Each end face defines an end of an associated cutout. The sector wings of the adjusting sleeve is mounted into a hole of the anti-torque ring with each end face bearing against an associated end of the associated flat section of the anti-torque ring. An outside rose is securely mounted around a second end of the adjusting sleeve to rotate move therewith.

Abstract: A door lock includes a main body including a transmission assembly and a positioning assembly. The positioning assembly includes an inside seat and an outside seat. An inside rose liner is mounted around the inside seat and includes two positioning holes. An inside rose is mounted around the inside rose liner. An anti-torque ring is mounted around the outside seat and includes two lugs formed thereon. Two positioning posts respectively project from the lugs and extend along a longitudinal direction of the anti-torque ring. An outside rose liner includes an inner threading that is engaged with an outer threading of the outside seat. The outside rose liner includes a side with an annular recessed portion for receiving the anti-torque ring. The annular recessed portion includes two recess extensions for positioning the lugs of the anti-torque ring. An outside rose is securely mounted around the outside rose liner to rotate move therewith.

Abstract: A cylindrical lock includes a transmission assembly and a positioning assembly. The transmission assembly includes a retractor, an inside spindle, an outside spindle, a latch bolt, a lock core transmission device, an inside handle, and an outside handle. The positioning assembly includes an inside hub, an outside hub, an inside escutcheon, and an outside escutcheon. The inside hub includes a flange formed on an outer periphery thereof. Two diametrically opposed tabs project from a first side of the inside hub. A tubular member projects from a second side of the inside hub and includes two diametrically opposed recesses in an outer periphery thereof. Two diametrically disposed through-holes are defined in the flange and aligning with the recesses, respectively. The outside hub includes a tubular section having an outer threading with two diametrically opposed recessed sections. The tubular section includes an annular flange formed on an inner periphery thereof.

Abstract: A door lock for use with a door having a through bore and an intermediate transverse aperture connecting said bore with an edge of the door, into which through bore actuator portions of the lock are inserted, and through which transverse aperture a latch portion of the lock is inserted; the lock having an outer first portion insertable into an outer portion of the through bore, an inner second lock portion insertable into an inner portion of the through bore, the lock first portion having at its inner end a laterally extending slot to receive the latch portion in entered relation therein, the lock second portion having a threaded cylindrical portion at its inner end, the lock first portion having a threaded inner end portion to make threaded engagement with the lock second portion, enabling rapid mounting of a lock within a door.

Abstract: A device for unlocking a tubular-type door lock in conjunction with the indoor handle is disclosed. A hollow shaft is fitted into the outdoor plate, while a hollow sleeve is axially received in the hollow shaft to be movable in opposite directions. The sleeve is normally and rotatably positioned in the opening of the outdoor plate to be unlocked, but selectively engages with the locking slot of the outdoor plate to be locked. A ratchet unit, consisting of locking and unlocking ratchets, is received in the sleeve, thus being operable in conjunction with the indoor handle to selectively move the sleeve. The two ratchets, individually having a ratchet face, engage with each other at their ratchet faces to be relatively slidable on their slope surfaces in conjunction with the indoor handle, thus selectively and axially moving the sleeve from the locked to the unlocked position.

Abstract: An auxiliary door lock in which a spring is coupled between a coupling block, which moves a latch bolt, and a left side board to push the coupling block and the latch bolt forwards when the door lock is unlocked and the key is removed from the door lock; the door handle is locked to stop the door lock from unlocking with the key when pressing a button on the door handle after the door handle has been turned to a vertical position, and unlocked when pressing the button again.

Abstract: A lever handle door lock keeps the lever handle horizontal and accommodates pre-manufactured doors with pre-drilled mounting holes at varying rotational orientations by providing a two piece adapter connection between the lever handle and a rose. The rose is mounted to the door via the mounting holes and includes a spring for returning the lever handle to horizontal. A first adapter piece is rotatably driven by the spring to return to a home position relative to the rose. A second adapter piece is connected to the lever handle and is adjustably connectable to the first adapter piece at different desired rotational orientations. Rotating the adjustable connection between the first and second adapter pieces changes the angle between the lever handle and the home position on the rose to bring the lever handle to horizontal regardless of the rotational orientation of the rose.

Abstract: A door handle assembly is described comprising a mounting base, a cover plate, an inner cylinder and a lock mechanism wherein the cover plate covers the means for attaching the handle assembly to a door. The handle or grip holds the cover plate in place and the lock mechanism holds the handle in place. The handle assembly cannot be removed without the removal of the lock mechanism.

Abstract: A fixing device for an item of door furniture such as a knob or handle includes a mounting plate assembly with an internal locking slide plate which engages, with a snap-action, fixing lugs carried by the knob or handle when the knob or handle is presented to the mounting plate assembly.

Abstract: A training device, for mounting to a standard door having a cutout at middle height, the door mounted in a door frame having a strike plate at middle height. A sliding box is mounted in the cutout for slidable motion toward and away from the strike plate. At least one spring is mounted between the sliding box and the cutout for biasing the sliding box toward the strike plate. The spring is selected to resist compression and thus motion of the sliding box away from the strike plate. The amount of resistance that the spring provides is equivalent to the amount of resistance presented by a doorknob and locking assembly on standard doors. Thus, a crowbar-like tool may be used to pry the sliding box away from the strike plate to open the door and simulate the force and action necessary to pry open any standard door.

Abstract: A torsion spring positioning device of a cylindrical lock includes a spindle outer casing through which a spindle extends and the spindle outer casing has two protrusions extending radially inward from an inner periphery thereof. The spindle has two slots defined in a periphery thereof and two stops extending radially outward from the periphery thereof so that two legs of the torsion spring respectively abut an end of the corresponding stop and an end of the corresponding protrusion. A washer is mounted to the spindle and has two notches defined in an outer periphery thereof so as to respectively receive the protrusions. A C-shaped clamping member is mounted to the spindle and has two stubs extending radially inward from an inner periphery thereof so as to be received in the slots.

Abstract: A fastening device used with a lock for firmly securing the lock in position against undesired rotational movement with respect to a door where the lock is mounted. The fastening device comprises a pair of mounting screws for firmly securing an inside and an outside escutcheon to the door and a pair of fastening screws extending through a main lock assembly to firmly support it with respect to the outside escutcheon of the already firmly secured inside and outside escutcheons assembly.

Abstract: A tubular lock assembly includes an inner handle, an outer handle, and a control mechanism. An outer protective cover is mounted to the outer side of the door plate and includes a pair of notches defined therein. The control mechanism includes a tubular shaft, a latch plate including a pair of protrusions formed on a mediate portion thereof, and a stop plate including two teeth. The tubular shaft includes a first end securely attached to the inner handle to rotate therewith and a second end. Two blocks are formed on the second end of the tubular shaft and have an operative recess defined therebetween. The teeth of the stop plate are received in the notches of the outer protective cover when the tubular lock assembly is in a locked position, and rotation of the inner handle in either direction causes the protrusions to be received in the operative recess of the tubular shaft such that the teeth of the stop plate disengage from the notches of the outer protective cover for unlatching.

Abstract: A universal door latch is mounted on a door having a series of holes therethrough for a latch spindle and fasteners. The latch has first and second subassemblies, a spindle, and means to rotate the spindle. The first subassembly includes a first housing which is secured to one side of the door and has a recess in its inner surface in which is seated a track plate with a central aperture and elongated slots diametrically spaced from the aperture. A pair of mounting studs are slidably seated in the slots, and a ribbon spring couples the mounting studs to cause the studs remain equidistant during their sliding movement. The second subassembly includes a second housing which is secured to the other side of the door and has a recess in its inner surface in which is seated a mounting plate with a central aperture and elongated slots diametrically spaced from the aperture. A pair of fasteners is slidably seated in the slots and engaged with the studs of the first subassembly.

Abstract: A lever assembly for a door lock which permits simplified assembly is provided. The lever assembly comprises a lock body cylinder, a lock shank with an inside portion and an outside portion extending from either side of the body cylinder and a series of components assembled to the outside portion of the lock shank with aligned central apertures to receive the lock shank. A retainer is operatively coupled to the body cylinder, and an annular outer plate is rigidly attached to the outside portion of the lock shank by mating internal and external threads. The retainer and annular outer plate are provided with mating elements disposed at different distances from a center point to allow for blink assembly of the two by rotation relative to one another. A leaf spring and actuator plate are coupled to the said outer plate with two outside cover pieces attached to the lever assembly.

Abstract: Method and apparatus for mounting a push/pull handle on a latch mechanism is disclosed. Recently, it has become desirable for large medical service facilities, such as hospitals, to change their door latch mechanisms from rotatable lever handles to push/pull handles. The apparatus comprises a pair of mating adapter plates mountable on either side of a door outwardly adjacent a mortise lock presently mounted in the door. The adapter plates include a plurality of pairs of aligned apertures, each of the several pairs of which are adapted to align with a pair of apertures which differing lock manufacturers position in differing radial and arcuate positions with respect to a mortise operating key. The adapter plates fasten through the mortise to the respective door sides and allow push/pull type handle assemblies to be mounted on the adapter plates so as to be operatively connected through the mortise operating key.

Abstract: A latch bolt operating device is adapted for use with a latch bolt unit that is installed in a door panel, and includes exterior and interior operating units. The exterior operating unit includes a key-operated plug-and-cylinder lock assembly, and an exterior housing having an outer annular cover, an inner annular cover and an annular shield. The outer annular cover has a rear end portion formed with a first annular shoulder. The inner annular cover is received in the outer annular cover and has a rear end portion formed with a second annular shoulder. The annular shield extends into the rear end portion of the inner annular cover and has a peripheral portion which engages the second annular shoulder when the latter is bent. The interior operating unit includes a torque bar and an interior housing. The torque bar can be positioned releasably in a first position corresponding to an extended position of a bolt of the latch bolt unit and a second position corresponding to a retracted position of the bolt.

Abstract: A modular return spring cage assembly for door lock handles, consists of a door lock mounting chassis member having two opposed faces, at least one face having two opposed arcuate channels forming a circular groove in the face. The groove has two split diametrically opposed spring bases each formed by two substantially equal spring stops projecting from radially outer and radially inner walls of the groove. Two compression springs are slidably disposed within the channels and have length such that a slight compression is required to fit the springs between the split spring bases. An arrangement for transmitting torsional motion between a door handle and the springs, and for limiting rotary motion of the handle is included. A provision for positively retaining the springs and the torsional motion transmission arrangement on the mounting chassis member completes the modular assembly.

Abstract: A handle-operated lock and latch assembly for interfacing a Eurocylinder type of electronic lock with a rose-accessible door lock/latch mechanism employs a handle of the type used in a mechanical handle-actuated door latch, but in which the shank portion of the handle is modified to include a cavity that accommodates a Eurocylinder-configured electronic lock. The original rose is replaced by a rose having a slightly larger circular aperture, so that it may receive a rotatable collar that is configured to engage the modified handle shank, whereby the handle and the collar are rotatable relative to the rose, with the cam of the electronic lock being inserted into the door's existing lock spindle mechanism.

Abstract: A thumb actuated latch retracting mechanism, for mounting with a grip handle on a door, includes a thumbpiece, the thumbpiece having a laterally offset cam on a second end thereof; an escutcheon plate having an opening through which the second end of the thumbpiece and the cam protrude into a door preparation cavity; and provision within the cavity for retracting a latchbolt in response to pressing the thumbpiece, the provision including a chassis mounted to the escutcheon and containing further provisions for converting linear motion of the thumbpiece cam to rotary motion of a spindle for retracting the latchbolt. The chassis also has tabs which act as barbs to hold the handle and mechanism against the door when pushed into mounting position and to simplify installation.

Abstract: A lockset chassis assembly is provided for use with a door latch. The lockset chassis assembly includes a rotatable spindle, a chassis supporting the rotatable spindle, a rose engaging the chassis at a junction therebetween and defining a space between the rose and the chassis at the junction, and a locking pin. The chassis includes an inner hub and an outer hub separated from the inner hub. The outer hub includes a threaded outer surface and an outer hub keyway interrupting the threaded outer surface. The locking pin engages the inner hub, lies in the outer hub keyway, and engages the rose and the chassis in the space at the junction between the rose and the chassis.

Abstract: The present invention relates to a system for reinforcing door frames and doors, and in particular to a unit including twin plates which are joined one to the other transversely through the door and which are positioned on the outside and on the inside of the door to reinforce the same at the level of the handle, the latch and the dead bolt. An inner plate is also proposed which is hidden in the door frame to reinforce the same at the level of the dead bolt.

Abstract: A latch assembly and process for manufacturing such an assembly and process for painting an assembly with a pivoting member are disclosed. The latching assembly comprises a body, a latch moveable between open and closed positions, and a thumb turn mounted for pivotal movement in the body. The thumb turn includes a cylindrical boss mounted for rotation in the body about a central axis of rotation, and a lever arm extending radially outwardly from the central axis of rotation of the cylindrical boss to a free end exposed outside of the body. A plurality of resilient arms having free hook ends engage the cylindrical boss to hold the cylindrical boss in the body while allowing for rotational movement of the cylindrical boss with pivotal movement of the lever arm. The free hook ends are held in a separate position which prevents rotational movement during the painting step of the manufacturing process.

Abstract: A system for attaching door lock trim roses on inside and outside faces of a door, has a mounting chassis with inside and outside members, each having outwardly projecting portions with opposed cylindrical sector arcs. Fasteners join the outside member to the inside member to secure both members against the outside and inside faces of the door. Interchangeable hollow inside and outside trim roses have at least two inwardly projecting pips close to a door contacting lip of the trim rose. Detents on the outside member of the mounting chassis receive the pips of the outside trim rose and secure the outside trim rose against the outside face of the door; and grooves on the inside member of the mounting chassis receive the pips of the inside trim rose.

Abstract: A kit for converting a key-in-knob lockset to a lever handle operated lock employs the existing cylindrical lock and its associated latch bolt. The conversion apparatus employs a lever handle having a non-circular shank portion which is received in, and thus drives, a resiliently biased coupling device which is interpositioned between the handle and a rose housing affixed to the door. The existing cylindrical lock is supported within the lever handle shank portion by a dummy bible member in such a manner as to prevent forces resulting from operation of the lever handle from damaging the cylindrical lock.

Abstract: A tubular lock assembly which is to be located within a suitable thru bore in a door comprising: a pair of rose liner assemblies each including a rose liner, a collar selectively sized to effectively close the thru bore of the door, and means for securing the collar on the rose liner. Means for securing the rose liner assemblies together on either side of the door with the collars effectively closing the door thru bore, the securing means including a screw interconnecting the collars.

Abstract: A field conversion means to convert a knob-handle cylindrical lockset either with or without a key cylinder, installed in a door, to a lever-handle cylindrical lockset without changing any existing original key cylinder. The conversion means comprises an inside and an outside means, each including a lever-handle, a drive cartridge adaptor cylinder and a rosette or escutcheon containing a helical spring and a positive stop disk. The spring is biased to oppose droop of said lever-handle from a normal horizontal position and to oppose downward operating force, applied to said lever-handle and is increasingly biased when the lever is operated to oppose downward rotation of the lever. Stop means are provided in the rosette or escutcheon to limit the angular rotational travel of said lever-handle. Differently sized adapters are provided to permit the conversion of different sized cylindrical locks.

Abstract: A door lock having upper and lower vertically spaced actuator seats centered on respective vertically spaced upper and lower axes has a handle assembly having inner and outer mounting plates horizontally flanking the door lock. An upper stem fitted in the upper actuator seat and supported on the inner plate can rotate about the upper actuator axis and carries an inner handle. A lower stem fitted in the lower actuator seat and supported on the outer plate can rotate about the lower axis. An outer stem separate from the inner stem and supported on the outer plate can rotate about the upper axis coaxially with the inner stem and carries an outer handle. Gearing interconnects the outer and lower stems for rotation of the lower stem about the lower axis on rotation of the outer stem about the upper axis.

Abstract: In a door knob assembly, a guide ring for a door fits within a rose member and provides a locator so the rose member is located exactly in the center of the round opening through the door, and provides additional strength to prevent movement of the door knob assembly in the door. The guide ring has guide tubes thereon that align with holes in the inside rose member. The guide tubes ensure that attachment screws to be threadably received in tapped holes in posts of the outside rose member are inserted axially parallel to both the axis of rotation of the door knob assembly and the posts. The guide ring ensures that the screws line up with tapped holes in posts of the outside rose member and do not float or drift out of such alignment.

Abstract: A handle assembly (5) is shown having a back plate (11) to which a knob (10) may be secured. A mounting plate (7) is fixed to the door (6). The plates (11, 7) have complementary fixing means (15, 16) to enable the plates to be secured to one another.

Abstract: A cylinder lockset (30) includes a chassis assembly (72) with sleeves (80) and (81). A pair of liners (36) and (48) are mounted on sleeves (80) and (81), respectively, and facilitate attachment of chassis assembly (72) with a door (260). A pair of spring cassettes (38) are mounted on sleeves (80) and (82). A pair of levers (42) and (54) are mounted on the sleeves (80) and (82), respectively, and operate cassettes (38) directly for spring return of the levers upon release thereof. A pair of posts (388) and (390) are mounted on liner 48 and are formed with score locator lines (412), (414) and (416) to locate the liner relative to a housing (74) of assembly (72). Liner (36) is formed with four mounting holes (356), (358), (360) and (362) which facilitate use of the liner with either a lefthand or right-hand door mode.

Abstract: An integral door knob assembly for mounting on a face of a door has a spring return so that the door knob rotates to one position when released. A shank formed integral with or attached to the door knob is formed of plastic material eliminating the requirement of a separate plastic bushing in the rose member, and has flexible fingers to provide a snap lock between a spring assembly member and the end of the shank to hold the knob assembly to the rose member. The spring assembly member is also formed of plastic material and has sufficient flexibility to allow a torsion spring to be inserted and removed.

Abstract: A handle lock having two handles to be symmetrically fixed on the inner and the outer bearing plate fixed on the inner and the outer side of a door, each handle assembled with a tubular shaft and a square shaft to retract a dead bolt to open the door, a locking rod combined in the inner bearing plate and being movable therein to permit the tubular shaft either to be rotated to open the door or to be prevented from being rotated by the handle either outer or inner, to lock the door.

Abstract: A latch bolt includes an outer knob and an inner knob, a tube rotatably engaged in the inner knob, a button having one end engaged in the tube and having the other end extendible outward of the inner knob, and a barrel rotatably received in the tube. The latch bolt is locked when the button is depressed inward of the inner knob and is unlocked when the inner knob is rotated. The latch is also unlocked when a key is inserted into the outer knob and when the outer knob is rotated.

Abstract: The lever assembly for a door lock comprises a door lock cylinder having a shank extended from each side of the door lock cylinder and two structure provided between the inside and outside lever and a door lock cylinder, respectively for resiliently returning and maintaining the levers in their horizontal positions. The returning and maintaining structure includes a spacer, a nut for fastening the spacer against the door lock cylinder, a mounting member for mounting a rotatable member, and a spring member cooperating with the rotatable structure and a retainer for holding the spring member, and a lever having a shaft fitted to the shank. The parts of the lever assembly are in turn fitted onto the shank in a cooperating relationship, thereby to resiliently return and maintain the lever in its original, horizontal position without tilting by using of the lever.

Abstract: An escutcheon used with a plumbing fixture that is recessed in a wall and that has a part projecting through the wall itself has a plate shaped to fit around the part flatly against the wall and formed offset from the part with a throughgoing hole. Structure fixed relative to the fixture forms a throughgoing hole offset from the part snugly receiving a radially expansible anchor tube also extending through the plate hole and having an enlarged head lying against an outer face of the plate. A screw engaged in the tube radially expands same into tight engagement with the structure hole.

Abstract: A rose retaining system comprising a mounting plate, rose, rose mounting screw and washer. The mounting plate is mounted to the door by screws passing through holes in the mounting plate. The rose plate is mounted to the mounting plate by the rose mounting screw. The rose mounting screw has a externally threaded tubular portion which passes through the center of the rose and is threaded into the internally threaded tubular projection of the mounting plate. The rose mounting screw is threaded until the slotted collar contacts the recessed shoulder of the rose plate. The key is then used to tightened the rose mounting screw, securing the rose plate in the desired position. The key can be used whether or not the spindle is mounted through the axially aligned openings of the mounting plate, rose and rose mounting screw. After mounting is completed, the exterior surface of the collar of the rose mounting screw is recessed below the outer surface of the rose mounting plate.

Abstract: A plastic door lock comprises opposed flat inner and outer cover plates (1,1') each recessed to house slidable drag units (3,3'), and a core unit (2) located between the cover plates (1,1') housing a latch unit (4) which, on sliding movement of the drag units (3,3'), can be moved between a closed position and an open position. A limit switch (25) housed in the inner cover plate (1') can be pivoted between an unlocked position permitting movement of both the inner and outer drag units (3,3') to actuate the latch unit (4), and a locked position preventing movement of the outer drag unit (3) but being such that, on movement of the inner drag unit (3'), the limit switch (25) is returned to its unlocked position to enable actuation of the latch unit (4) from inside the door. The components of the lock are moulded from a plastics material.

Abstract: A tubular door lock for low safety comprising two knobs provided with a tubular shaft combined with a bearing plate, the tubular shaft having a hook and a projection to combine with an actuating plate, a square rod provided to fit in the actuating plates at both ends to enable the two knobs--the inner and the outer one--to move together at the same time.