Abstract: A lock mechanisms for a fenestration assembly, such as a sliding door, includes a strike element preferably coupled with the door frame and a catch assembly preferably coupled with the fenestration member slidably supported within the frame. The catch assembly includes a catch having structure defining an element receiving slot. The catch is mounted for shifting among a plurality of positions including an engaged position in which the element is received within the slot and retained therein by the catch when the fenestration member is in a closed position, a disengaged position in which the element is disengaged by the catch when the fenestration member is shifted out of the closed position, and an intermediate position in which the element is received within the slot and the catch is positioned between the engaged and disengaged positions.

Abstract: A first column-like portion of a hook rod, substantially oval-shape in cross section, is fitted in hooks and then turned around its longitudinal axis by about 90°. Since a diameter in the vertical direction facing to a lower surface of the hook from the center of the first column-like portion having a substantially oval-shape in cross section increases with turning, pressing force becomes larger as the turning angle increases. Therefore, based on the pressing force an upper surface at a flange is pressed toward a flange of a case by a part positioned at the lower end in an outer peripheral surface. Based on the pressing force the flanges, an element peripheral portion sandwiched therebetween is elastically pressed to shrink, whereby the case and the cap are fastened by a simple operation of only fitting and turning the first column-like portion in recesses of the hooks.

Abstract: A panel fastener has a casing with two side walls formed with a boss having an outer annular wall that extends reentrantly from an adjacent planar surface of the casing side wall and an inner annular wall with a planar edge recessed from the adjacent casing side wall surface. A cam has a shaft journaled in the boss inner walls that extends out from the boss inner walls. A hook is mounted in camming engagement with the cam whereby the cam shaft is maintained axially aligned in said bosses by their inner wall edges.

Abstract: A fastener for coupling two members together is provided with a rotatable core carried by a first member and a protruding elbow for insertion through an elongated slot in the second member. By rotating the core, the elbow is caused to swing over the outer surface of the second member, adjacent the slot, coupling the two members together. The inner, member-engaging surface of the elbow is tapered to form a ramp-like surface that, with rotation, draws the two members together and frictionally fixes the elbow in its engaged position. The latch core when installed in a tubular first member may be provided with resiliently based, expanding locking members positioned adjacent to the core to secure the latch within the hollow core of the tubular first member.

Abstract: A check rail lock securable to the top rail of one window sash of a double hung window, including a housing, a cam pivotable about a first axis within the housing between an open position and a locking position, a pin extending from the bottom of the cam, and a guard member disposed substantially beneath the cam and pivotable about a second axis within the housing, the guard member having a slot receiving the pin for moving between a guarding position and a retracted position responsive to pivoting of the cam between the locking position and the open position. The cam in the locking position includes a portion extending from the housing and adapted to cooperate with a keeper secured to the other window sash to lock the one window sash in a closed position relative to the other window sash. The guard member extends from the housing to substantially overlap with the cam extending portion in the guarding position and the guard member is substantially entirely retracted into the housing in the retracted position.

Abstract: A lock device includes a frame which has an opening and a fixed portion internally provided therein. A lid member is hinged to the frame, the lid member being rotatable between an open position and a closed position, the opening of the frame being opened by the lid member at the open position and closed by the lid member at the closed position.

Abstract: The sash lock has a rotatable cam which engages the keeper. The sash lock has a slide plate mounted below the cam and the slide plate moves between a retracted position in which its leading edge is flush with the sash to which the lock is mounted. In an extended position in which the leading edge of the plate extends far enough to block the narrow gap between the sashes. The slide plate is mounted for movement perpendicular to the edge of the sash and parallel to the plane of the top surface of the sash. The slide plate includes an arcuate recess in one side of the plate which is engaged by a pin extending from the rotatable cam. The recess in the slide plate is contoured so that during initial portion of the movement of the cam from its open position toward its locked position, the slide plate does not move.

Abstract: A lock of the catch type adapted to use in combination with a casket is disclosed. The lock includes a locking pin and a receiving element. The locking pin in installed on the lid of the casket and has a portion configured so to enable it to engage and remain engaged, when so desired, in the receiving element of the lock. The receiving element is installed in one of the side walls of the casket so that it is directly opposite to the locking pin. The receiving element comprises a hollow cylinder case adapted to be inserted and rotate with respect to a sleeve. The hollow cylinder case and the sleeve each comprises an opening for receiving the corresponding portion of the locking pin. The receiving element further including a compressible O-ring for enabling the hollow cylinder case to be inwardly biased against the sleeve during locking and unlocking of the lock.

Abstract: A rotary latch for a clamshell housing with truncated circular upper and lower lugs, that can if desired, be made in a single plastic molding and rotatably attached to the housing without any rivets, pins or screws. The upper lug has an arcuate extent of more than 180 degrees and the lower lug has an arcuate extent coaxial with the upper lug but less than 180 degrees. The latch is an annular plastic body that is deformed to snap over and rotatably mount on the upper lug, effected by an annular recess in the body that extends 360 degrees inside around the body so as the body rotates on the upper lug, it never loses contact over any portion thereof. The lower lug is axially offset from the upper lug and the latch body has a latch cup portion that scoops and aligns the lower lug with the upper lug in three orthogonal coordinates. The latch cup portion is also axially offset from the upper lug so it can pass behind the upper lug as the latch body is rotated from a latch position to a release position.

Abstract: A latch dog assembly for latching and unlatching a storage bin door includes a latch dog member having a base portion, an end wall portion, and a cylindrical wear block member which extends outwardly from an opening on the inner wall of the end wall member so as to allow a latching cam to properly secure the bin door while avoiding undesired metal to metal contact. In one embodiment of the invention, a projection extends outwardly from the latch dog member base portion upper surface so as to assist in retaining the wear block member within the opening in the inner face of the end wall portion.

Abstract: The assembly includes an integral corner door and a latch assembly, the latch assembly including a user acuatable element, a dog-ear element, a cam receiving element and a door extension. The integral corner door has a hinging portion hingedly connected to a first surface of the housing and a latching portion perpendicular to the hinging portion connectable to a second surface of the housing. The user actuatable element has a user manipulative portion and a rotatable shaft affixed thereto. The user manipulative portion is positioned on the second surface of the housing. The shaft extends through an opening through the second surface. The dog-ear element of the latch assembly is securely affixed to the shaft. The dog-ear element has a first hooked end and a second end. The first hooked end forms a recess. The hooked end has a terminal cam portion. The second end includes a door disengaging portion.

Abstract: A panel fastener has a hook and cam assembly with a C-shaped leaf spring mounted in a recess in the camming surface of the cam. The recess is formed with a central barrier with opposed ledges on which the spring is mounted. Rotation of the cam causes the spring to frictionally engage the hook and in so doing become compressed and to flex below the recess edges without crimping.

Abstract: A single point lock or cam lock for a casement window is provided. The lock includes an escutcheon providing a low profile and a smooth uninterrupted surface which faces the inside of the room. The handle includes two opposing legs that enter the escutcheon for attachment to the hook through opposing side walls of the escutcheon. A shaft provides the connection between the hook and the handle which rotates on two brace structures provided by the frame. The frame is sandwiched between the escutcheon and the inside surface of the window frame. The design of the escutcheon, the shaft and the braces of the frame provide for an effective seal against the inside surface of the window frame.

Abstract: A safety door latch 10 has a base 12 with a shaft 24. A venting disc 30 is rotatably mounted on the base shaft. A lever 50 with a strike locking cam 54 is mounted on the base shaft over the venting disc. Lugs 23, 32 provide for limited relative movements of the locking cam with respect to the venting disc in conjunction with spring bias detenting balls 44.

Abstract: Apparatus for selectively permitting access to the interior of a boiler and selectively closing off access to the interior of the boiler which includes a frame, a support plate, and a hinge. The hinge couples the support plate and the frame and allows pivotal movement of the support plate with respect to the frame. The apparatus also includes a door plate; and apparatus for coupling the support plate to the door plate. In some forms of the invention the apparatus for coupling comprises a plurality of studs fixed to one of the plates in generally parallel spaced relationship. The other of the plates may include a plurality of holes disposed in generally registered relationship to the studs and dimensioned for loose fitting engagement with the studs. The apparatus may also include apparatus for latching the support plate to the frame to prevent pivotal movement thereof with respect to the frame. The apparatus may also include apparatus for urging the door plate away from the support plate toward the frame.

Abstract: A window latch includes a catch that is movable into and out of engagement with a keeper. A handle is connected to the catch and rotates relative to a base to move the catch relative to the keeper. Rotation of the handle relative to the base also causes axially movement of another member between positions of relatively greater and relatively lesser stability. The positions of relatively greater stability correspond to complete engagement and complete disengagement of the catch and the keeper.

Abstract: A racking resistant door control mechanism for securing a pivoted door employs an elongate lock rod that extends the height of the door and is journaled for pivotal movement by bearing assemblies having steel covers that enclose plastic bearing liners. The lock rod has upper and lower cam-type latch members welded to its opposite ends for engaging keeper members carried by upper and lower parts of a door frame for holding the door closed. The lock rod extends through and is welded to a steel sleeve at a location spaced a short distance upwardly from the lower latch member. If the lock rod is formed from two elongate elements instead of one, the sleeve is welded to both to aid in forming a connection therebetween. Racking resistance is provided by locating the sleeve and the bearing assemblies such that the steel covers of the bearing assemblies are held in engagement with the latch members and with opposite ends of the sleeve.

Abstract: A racking resistant door control mechanism for securing a pivoted door employs an elongate lock rod that extends the height of the door, is journaled for pivotal movement about a lock rod axis by door mounted bearing assemblies, and has cam type latch members welded to its opposite ends for engaging keeper members carried by upper and lower parts of a door frame. The cam and keeper members feature novel, compact arrangements of interengageable formations that are located on opposite sides of, but relatively near to, the lock rod axis of the locked door--formations that cooperate in bringing the door to its fully closed position, in securely retaining the door closed, in preventing racking movements of the closed door and its adjacent door frame, and in breaking the door open when ice formations, cold seals or the like resist initial opening movement of the door.

Abstract: A retaining latch for use in a hazardous materials storage or handling facility to adjustably retain a water pit gate in a gate frame. A retaining latch is provided comprising a latch plate which is rotatably mounted to each end of the top of the gate and a recessed opening, formed in the gate frame, for engaging an edge of the latch plate. The latch plate is circular in profile with one side cut away or flat, such that the latch plate is D-shaped. The remaining circular edge of the latch plate comprises steps of successively reduced thickness. The stepped edge of the latch plate fits inside a recessed opening formed in the gate frame. As the latch plate is rotated, alternate steps of the latch plate are engaged by the recessed opening. When the latch plate is rotated such that the flat portion of the latch plate faces the recessed opening in the gate frame, there is no connection between the opening and the latch plate and the gate is unlatched from the gate frame.

Abstract: An improved single actuation casement and awning window securing mechanism comprising two cams and a linking arm held in tension upon closing. The cams operate in unison in a clamshell fashion, such that closing and opening of the single actuation sash lock is accomplished in an easy and secure manner.

Abstract: A draw latch assembly is formed of three major components including a base member and a latch or bail member interconnected by a link member. The link member and the base member are capable of being pivotally connected in either of two positions rotated 180.degree. from each other so that the reach of the bail member can selectively be either of two different lengths.

Abstract: An overcenter latch for securing a closure to a body panel includes a panel bracket disposed opposite a closure striker block with a rubber link pivotally connecting the bracket and an operating handle. The block has spaced apart outwardly opening recesses each having a transverse raceway providing opposed inboard and outboard pivot sockets. A pair of depending handle prongs, each terminating in an arcuate cam, are adapted to snap overcenter on an associated raceway for pivotal reception between respective inboard and outboard pairs of sockets. The cams are readily positioned in their associated inboard sockets without the link being tensed. During latching, the handle cams are initially rotated about an inboard socket axis to an overcenter point, wherein the link is tensed to a predetermined dimension less than the links theoretical latching overcenter length.

Abstract: Sash lock for double hung windows which substantially limits movement of the sashes upon engagement of the sash lock. The sash lock also has an improved latching construction which results in a simple, easily manufactured latching portion.

Abstract: A hatch dog handle mechanism includes a rotatable hub assembly which includes a handle, a locking lug. A locking plate or portion of the frame is also provided for engagement by the locking lug. The locking lug is rotatable about a central axis through a limited arc by the handle. The handle is also rotatable through a limited are about a second axis which is perpendicular to the first axis. The mechanism also includes a locking element to prevent rotation of the handle about the second axis and a second locking element to prevent rotation of the handle about the first axis when in a first position with respect to the second axis.

Abstract: A lock for grasping a keeper to lock a window sash and window frame together including a base housing with a longitudinal opening therethrough and defines a pivot axis positioned between the ends of the opening, and a locking handle secured to the housing for pivoting about the pivot axis and including a handle portion extending from the one side of the housing opening and a grasping portion extending from the other side of the housing opening. The housing has a first shoulder facing one side of the housing opening and extending about the opening associated with one end and a second shoulder facing the other side of the opening and extending about the opening associated with the other end. A first handle shoulder abuts against the first housing shoulder when the locking handle is in a locking position, and a second handle shoulder is disposed adjacent to and overlapping with the second housing shoulder when the locking handle is in a locking position.

Abstract: An interlock system for locking wall panel frames. Vertical frame members are provided with keyhole-shaped openings for receipt therethrough of the head of a carriage bolt in one portion and having and a second elongate slotted portion capable of a non-rotationable engagement with the carriage bolt. A threaded shaft of the carriage bolt being threadably engageable by a dowel freely rotationally held by a lever bracket whereby the dowel can be threaded along the threaded shaft to bring the lever bracket against one of the vertical frame members. The latch bracket having camming edges and being pivotal around said dowel in a past-center relation whereby to cam said camming edges against the second frame member and lock the two vertical frame members together without the use of hand tools. Access from only one side of a panel frame joint is necessary to engage or disengage the interlock system.

Abstract: An improved latch for securing together two portions of enclosure in which a rotary latch member is secured for rotation to an upstanding wall of one of the portions of the enclosure. The latch member includes a generally circular disk having an annular wall formed about the periphery thereof, the annular wall having an interruption therein and the latch member being rotatable between locked and unlocked positions. A lug is formed on an upstanding wall of the second portion of the enclosure upon assembly of the two portions of the enclosure, the lug is received interior of the annular wall through the interruption therein and the latch member is rotated to the locked position to confine the lug within the annular wall. A stop member extends from one of the upstanding walls generally adjacent the periphery of the disk and includes a locking aperture. A locking lug extends generally outward from the annular wall of the latch member and generally tangentially to the periphery of the disk.

Abstract: A snap in latch assembly for selectively locking a movable member to a fixed member and preferably for locking double hung windows includes a keeper which would be secured to the hollow rail forming the frame of the fixed sash. A latch housing would be secured to the hollow rail forming the frame of the movable sash. Both the keeper and latch housing are secured to their respective rails in a snap in manner without the use of fasteners such as rivets or screws. The keeper includes at least one retainer pin having an undercut for snapping into a slot in its rail and includes at least one anchor member for engagement with the rail when the keeper is slid to its mounted position. The latch housing includes at least one retainer arm having an undercut for snapping into a slot in its rail with at least one locator bar engaging the rail when the housing is slid to its mounting position.

Abstract: In a double door device for the tight transfer between two closed volumes a centralized control mechanism (28) having incorporated safety means is proposed. This mechanism (28) comprises a mobile control member (36), placed opposite to a hinge of one (22) of the doors and facing a part (42) connected to said door (22). The mechanism integrates four mechanical bolts (48,62,78,92). Two of them (48,62) prevent any opening manipulation when a second door is not present and when a second flange is not entirely connected to the flange carrying the control member (36). A third bolt (78) prevents any disconnection between the two flanges after the control member (36) has cleared an intermediate locking position. Finally, a fourth bolt (92) prevents the return of the control member (36) to its initial position when the doors are open. In a certain number of industrial fields, e.g.

Abstract: A latch assembly is mounted in an aperture formed in a first member. The latch assembly includes a housing which is received within the aperture of the first member and includes an aperture extending therethrough. A slide is included which is received through the aperture of the housing. A pawl is also provided on the slide. A handle is pivotally attached to the slide for facilitating movement of the slide and pawl axially as the handle is pivoted between closed and opened positions. The pawl engages a second member in a latched position when the handle is pivoted to its closed position. The handle is also adapted for movement in a direction generally along a longitudinal axis thereof upon the closing and the opening of the handle which enables a first end of the handle to be positioned proximate to the housing when the handle is in its closed position.

Abstract: Hinge and latching structures associated with a door for a pressure vessel provides a tight and competent seal when the door is in sealed relationship with the opening of the vessel. The latching structure includes coupling structures which provide increased clamping engagement of the door in response to any increased pressure differential developed across the door.

Abstract: A locking mechanism for a double hung window includes a strike bracket and a locking member. The strike bracket attaches to the upper window sash, and has an upstanding locking plate with a vertical series of locking hooks, each extending inward and curling downward and back outward. The locking member attaches to the lower window sash, and has a rotatable clasp with a clasp hook extending outward and curling upward and back inward. The clasp hook selectively engages the locking hooks on an inward and downward line of action to clamp the window sashes together against relative movement, both vertical and horizontal.

Abstract: A latch dog assembly for a hinged door in a bin for bulk material wherein the latch dog includes a housing with a wear block of UHMW polyethylene plastic or similar low friction material and with the assembly being constructed to ensure proper drainage during cleaning and so that pressure of the door cam retains the wear block in proper position.

Abstract: An access door assembly for a pressurized windbox, comprising a door frame having an opening with a post extending from the door frame. A door is pivotally mounted to the frame at a hinge. A latch is pivotally mounted to the door and includes a hook which engages the post for locking the door to the frame. The latch also includes a catch member extending beyond the hook for catching the post when the latch is moved to unlock the door. This stops the door in an intermediate partly open position allowing gusts of air to blow through the opening thereby giving the operator a warning and indication that the windbox is in fact under pressure. In this manner, an operator has sufficient time to step out of the way before moving the latch further, thereby fully disengaging the latch from the post and allowing the door to open fully.

Abstract: A door system for use in a mine stopping comprises a door frame for installation in the stopping to define a doorway, a door hinged to a first side of the door frame for swinging between an open position and a closed position in which the door closes the doorway, and a latch for latching the door in its closed position. The latch comprises a strike which is secured to a second side of the door frame generally opposite the first side and which has a strike plate portion disposed in the doorway in a plane generally perpendicular to the plane of the doorway and spaced from the second side of the door frame thereby to create a void between the strike plate portion and the second side of the doorway. The strike plate portion has a latching aperture therein.

Abstract: A check rail lock including a housing with a pivot opening, a handle having a pivot shaft extending through the pivot opening, the handle being disposed over the housing when operably pivoted between locking and unlocking positions, and a cam secured to the pivot shaft beneath the housing with a post extending toward the housing. A C-shaped spring mounted to the housing between the housing and the cam has shoulders which (1) allow the spring to flex outwardly to allow passage of the post past one of the shoulders when pivoting the handle from a painting position extending away from the housing to either operational locking or unlocking position and (2) stop the handle from being pivoted beyond the locking or unlocking positions to the painting position. Recesses in the spring adjacent the shoulders positively indicate when the lock is in either the locked or unlocked positions.

Abstract: A door handle for breaking a vacuum seal and opening a door in a single operation includes a handle and a latch cam, attached to the door, and a pin, attached to a frame of the door. The pin is engageable with a slot positioned on the latch cam. The slot extends circumferentially around at least a portion of the diameter of the latch cam. Due to the configuration of the slot, as the pin travels within the slot to a closed end of the slot, the pin progresses from a position farther from the door to a position closer to the door, causing the pin to exert pressure on a second surface of the slot, which pulls the door toward the frame to close the door. As the pin travels within the slot away from the closed end of the slot, the pin progresses from a position closer to the door to a position farther from the door, causing a first surface of the slot to exert pressure on the pin, which breaks the vacuum seal and unlatches the door to open the door of a housing.

Abstract: A locking mechanism for a sash type window comprising two adjacent sashes arranged to slide one behind the other in a generally horizontal direction within an enclosing frame is disclosed. When the window is in its closed position, actuation of the locking mechanism causes the sashes to slide relative to one another in a direction away from each other to assure better sealing between the sashes and the enclosing window frame. In a preferred embodiment, the two sashes are also drawn towards each other in a direction perpendicular to the sliding direction in order to obtain better sealing between the sashes themselves. The locking mechanism may also be used on sliding doors.

Abstract: A peristaltic pump comprising a housing (19), including a base (21), a resilient tube (27) and a peristaltic pumping fingers (31) carried by the supporting structure. The tube (27) is positionable on the base (21) in a proper position and an improper position. In the proper position, the peristaltic pumping fingers (31) can properly progressively squeeze the tube to pump a fluid through the tube and in an improper position. A door (23) is mounted on the housing (19) for movement between an open position and a closed position. A latch (25) includes a pivotable latch member (51) on the door (23) and a fixed latch member (55) on the housing (19). The pivotable latch member (51) is movable between a latching position in which the door (23) is locked in the closed position and a releasing position in which the door (23) is not locked in the closed position. If the tube (27) is in the improper position, the pivotable latch member (51) is prevented from being placed in the latching position.

Abstract: An improved method and apparatus for latching and securing closure members within a frame are disclosed. A switching latch operatively secured to a first closure member engages a keeper secured to a second closure member and is rotationally operable to secure the closure members within the frame by simultaneously imparting translational forces to closure members through the keeper along two mutually orthogonal axes.

Abstract: An improved structure is provided for a window sash lock having a catch mounted to a face of a window frame to grasp and release a keeper reciprocally mounted to a face of a window sash. A housing (12) is mounted against the frame face (13) that has an opening therethrough with a portion substantially cylindrical about an axis perpendicular to the frame face (13). An operator (52) for the catch (32) comprises a cylindrical pivotal portion (56) which is receivable within the housing cylindrical portion and is adapted to pivot about the axis. The operator also includes a handle portion (54) secured at one end to the operator pivotal portion (56). The operator further comprises an actuator portion having a button (60) at one end for engaging the catch to control movement thereof. The actuator portion is secured at the other end to the operator pivotal portion. A part of the actuator portion is trapped between the housing and the frame face to prevent removal of the operator from the mounted housing.

Abstract: A casement window locking system includes a rotatable locking cam mounted in the frame jamb with a window catch access opening on one side and a locking lever access opening on the opposite side. The locking lever has a U-shaped inner end which embraces the locking cam when the two members are engaged and a tab on the locking cam engages a shoulder on the locking lever to prevent withdrawal of the locking lever until a tool is used to raise the locking cam when the tool is inserted through the catch opening. In an alternative embodiment, a spring clip may be placed on top of the locking cam and it includes a shoulder for engaging the shoulder on the locking lever. The removable locking lever makes it possible to install and finish the window without the locking lever and change locking levers to color coordinate with the room interior.

Abstract: A readily demountable door assembly for sealing an aperture in a duct comprises a door member having an inwardly directed ramp or cam which lies within the duct and is inclined outwardly toward the duct surface. A clamp is adapted to be mounted adjacent the aperture of the duct at a position diametrically opposite the ramp. The clamp engages the door and shifts the same in the direction of the ramp, which movement presses the flange of the door tightly against the duct surface, the clamp including portions which overlie the door at positions remote from the ramp to urge such remotely disposed portions of the door against the duct surface.

Abstract: A lock is described which is adapted for use in combination with a conventional latching handle assembly mounted on the bottom panel of a roll-up door mounted on a truck or the like. The lock includes a laterally movable dead bolt which, when locked, is in the pivotal path of the latching handle assembly thereby preventing the latching handle assembly from being moved to its unlocked position. A counter is also associated with the lock which visually indicates the number of times that the lock has been actuated.

Abstract: Locking mechanism for burial caskets in which a rod extending into the outer wall of the casket shell rotates a latch having a hook-like arm extending above the upper edge of the casket shell and provided with a cam surface which engages a keeper member on a matching edge of the casket cap to pull the cap tightly against the shell.

Abstract: A releasable latch construction having a body member attachable to a panel, a latching member turnable on the body member for arcuate movement between a latching position and a releasing position, a locking mechanism movably carried by the body member and operable to lock the latching member in either its latching position or else in its releasing position, and an actuator movably carried in the body member and engageable with the locking mechanism, for effecting the locking or releasing movement of the latching member. The actuator is directly engageable by a latch key and is shiftable thereby in order to effect such movements.

Abstract: A latch for slidable window panels of a vehicle. The latch includes a rotatable handle carried by one window panel and a cam part carried by the other window panel. The handle engages the cam part as the handle is rotated to draw the slidable window panels together. The handle defines a narrowing channel which engages the cam part as the window handle is rotated from an open position to a locked position. The narrowing channel, formed by a thickening outer side wall of the handle, draws the cam and its connected window toward the handle. Detents are provided to impart a positive snap feel to the handle when rotated into either its opened or closed positions.

Abstract: A combination door and door frame primarily designed for blast shelters wherein the hinged door, which in locked position is designed to withstand external overpressures resulting from detonation of either nuclear or conventional weapons, swings inwardly when opened, thus avoiding the objection of outwardly opening doors which can be blocked by rubble, debris, soil, etc. projected by the force of the explosion piling up against the door resulting in the occupants becoming entombed in the shelter.

Abstract: A rotatable knob mounted at one side of an opening to a container has formed on the underside thereof a recess and a channel extending therefrom through the periphery of the knob. Opposite the knob on the other side of the container opening is secured a clasp. When the knob is rotated into its open position with the catch channel directed toward the catch, closure of the opposite sides of the container opening moves the catch through the catch channel to the recess on the underside of the knob. Thereafter, rotation of the knob in either direction out of its open position, captures the catch in the recess on the underside of the knob. Release of the catch is accomplished by rotating the knob back to its open position. In an alternative embodiment, the catch channel terminates short of the periphery of the knob, but a portion of the knob extends beyond the edge of the container opening.

Abstract: An improved structure is provided for a window sash lock having a catch mounted to a face of a window frame to grasp and release a keeper reciprocally mounted to a face of a window sash. A housing (12) is mounted against the frame face (13) that has an opening therethrough with a portion substantially cylindrical about an axis perpendicular to the frame face (13). An operator (52) for the catch (32) comprises a cylindrical pivotal portion (56) which is receivable within the housing cylindrical portion and is adapted to pivot about the axis. The operator also includes a handle portion (54) secured at one end to the operator pivotal portion (56). The operator further comprises an actuator portion having a button (60) at one end for engaging the catch to control movement thereof. The actuator portion is secured at the other end to the operator pivotal portion. A part of the actuator portion is trapped between the housing and the frame face to prevent removal of the operator from the mounted housing.