Abstract: A releasable door hold-open mechanism, for use with a door closer, is disclosed. The mechanism employs a latch assembly, mounted in a track which defines a predetermined path for a slider shoe associated with a door closer arm. The latch assembly employs a pair of reciprocable rollers, associated with a solenoid activated clevis. When the solenoid is actuated, the clevis maintains the rollers in a latching position, in which they can capture and hold a wedge associated with the slider shoe. Deactivation of the solenoid permits release of the wedge, and the force of the solenoid can also be overcome manually to release the wedge. The latch assembly is selectively positionable in a broad range of positions within the track, to determine the angular position of the door at which holding occurs.

Abstract: A latch device for a hinged door including a resiliently flexible latch bar secured to the door and having a free portion extending along the inside of the door to an end portion, near the door edge, which engages a catch by means of the bending and straightening of the latch bar. Preferred embodiments include a stop bar similar to the latch bar, but extending beyond the opposite door edge to engage another catch to hold the door open. The latch and stop bars are preferably a single bar with two free portions at its opposite ends. The catches have bearing surfaces which distort the bar as the door swings to prepare it to snap into locking engagement with the catches. Access to the latch bar, to allow unlatching, is provided through the door.

Abstract: A venting arrangement for an automotive vehicle is provided in which its rear closure is automatically raised to a slightly open position in response to opening a door of the vehicle so that upon closing the door, entrapped air in the vehicle can escape through the rear to reduce door closing effort. The arrangement includes a latch and pull down mechanism for the rear closure of the vehicle to move the same between a partially open and a closed position and a control means including door jamb switches for energizing the pull down unit to raise the rear closure to its partially open position in response to opening movement of the door and to return the same to its fully closed position in response to closing of the door.

Abstract: A sliding truck window bar lock includes a pair of bars, each bar being hingedly mounted atop a vertically oriented post and collar asembly and adapted for mounting to the rear wall of a passenger compartment in a pick-up truck such that an operator may move the bars into a locking orientation intermediate the edge of a sliding glass window and the window frame. Each bar may consist of a pair of telescoping tubes, each tube having a plurality of holes such that they may be telescoped in and out to align the holes and adjust the effective length thereof.

Abstract: A door latch apparatus has a door latch face plate adapted to be attached to a doors edge and a door latch bolt adjustably fastened to the door face plate and having a latch head on one end thereof protruding from the door latch face plate. A door jamb bracket has a latch head track formed therein for receiving the door latch bolt latch head therein when the door is closed. A latching member is hinged to the door jamb bracket and has a latch head track formed therein. The latching member has an unlatched position swung out of the path of the latch bolt latch head protruding from the door and a latched position aligning the position of the latched member latch head track with the door jamb bracket latch head track so that the latch bolt head will slide from the door jamb bracket latching head track into the latching member latching head track when the latch member has been placed in a latched position while the door is closed.

Abstract: A lock for selectively locking sliding patio doors and other closures in fully closed and partially open positions and characterized by ease of installation and use.

Abstract: A latching mechanism provides a locking support for an article which periodically requires to be moved from a rest position to a stable elevated position. The latching mechanism comprises an assembly attached to the article and movable therewith, the assembly containing a guide mechanism which cooperates with a cam pawl device mounted on a fixed assembly. The cam/guide mechanism interaction provides for a 180.degree. cam rotation driving a sequence of article movements from a rest to elevated/locked to rest position.

Abstract: A safety door latch, which can be simply and quickly disengaged in the event of an emergency, has an elongated keeper plate, which is secured to the inside of the stile of a door in proximity to the edge of the stile and substantially perpendicular thereto. An elongated slide, which is received by and releasably retained within the keeper plate, has an elongated slot therein for releasably securing a chain thereto. The proximal end of the slide is positioned within the keeper plate near the edge of the stile, and the distal end of the slide, which terminates in a clasp, is positioned within the keeper plate away from the edge of the stile. A chain is anchored at one end thereof to the striker jamb of the door and has a pin secured to the other end thereof for insertion into the slot and releasable retainment therein.

Abstract: Multiple embodiments of a security lock for hinged entry doors or the like are disclosed, each having a strike plate adapted for mounting on the door jamb with a lock element being selectively operable for locking the door and being opened inwardly. In one embodiment, the lock element is engaged with a slotted extension of the strike plate for locking the door and with an offset plate portion for storing the lock element in an unlocked position out of engagement with the door. In another embodiment, the lock element is connected to an offset portion of the plate by an elongated flexible element such as a chain. In yet another embodiment, the lock element is an elongated hook member which is rotatably attached to the plate and extends inwardly of the door in its closed position, the hook member being rotatable into either a locking position for engaging the door after it is opened a short distance from the jamb or an unlocked position.

Abstract: A child resistant safety latch for the door or drawer of an enclosure such as a cabinet. The door or drawer is latched in a slightly ajar position from which it can neither be fully opened nor reclosed, preventing both access to the contents of the enclosure and possible injury to the child's fingers upon reclosure.

Abstract: An auxiliary door latch for children's safety which comprises a flexible tape-like member having openings in opposite end portions for detachably engaging projecting heads provided on the free end portion of a door and the adjacent jamb. The flexibility of the tape-like member permits reliable and facile accommodation for the particular locations of said heads, which latter may, if desired, be readily removed in periods of disuse.

Abstract: A combination stop and latch for a door. The latch is swingably carried within the door or structure side wall with the stop secured to the other of the door or side wall. The latch automatically swings into an extended position projecting from the door or side wall as the door is opened for engagement with the stop.

Abstract: An automobile trunk tie-down is constructed of a flexible strand provided with a plurality of eyelets disposed at intervals throughout its length to receive hooks mounted inside the trunk compartment and lid, so that varying lengths of strand may be selected depending upon the size of the object being transported in the automobile trunk which prevents the lid from closing over it. Automatic storage of the tie-down is provided by means of a conventional retracting reel permanently mounted within the trunk.

Abstract: A window pane is hung along one edge of a window frame by a flexure mechanism arranged to permit pivotal movement of the pane about an axis oriented along the corresponding edge of the frame. An over centered handle latch is mounted on the lower edge of the frame and is operable to move the window pane between an open and closed position. A resilient hinge connects the handle latch directly to the pane so as to enable the handle latch and pane to have relative elastic movement during movement into and also in both the closed and open condition.

Abstract: The locking bar assembly of the present invention is adapted to lock horizontally slidable, overlapping window doors, such as patio doors, in closed position. One end of a locking bar is pivoted to a bracket, or pivotal member, for movement in between a stored vertical position and a horizontal locking position. A clasping member, carried by the bracket, resiliently retains the locking bar either in the vertical position, or against upward pivoting from its horizontal position. The bracket is so constructed that it can be secured to the sash or to the handle flange of one door when the two doors can be opened, or to the door opening frame when only one door can be opened.

Abstract: A door operating mechanism for a cab door of a material handling implement is disclosed which includes a hold-open latch arrangement for conveniently maintaining the door in a partially open position. The operating mechanism includes a selectively operable door latch mechanism mounted on the cab door which cooperates with a latch pin mounted on the cab frame for releasably maintaining the cab door in a closed position. The hold-open latch of the mechanism is pivotally mounted on the cab door for movement between active and inactive positions, whereby in the active position thereof the hold-open latch is releasably engageable with the frame-mounted latch pin. By this construction, the hold-open latch and latch pin can be positioned in cooperating engagement with each other whereby the cab door is maintained in a partially open position.

Abstract: An apparatus, for retaining a sash in a desired open position in a projected window, comprises at least one retaining unit adapted to be mounted on an outer frame, and at least one transforming unit adapted to be mounted within an inner frame. The retaining unit includes a tube-like member adapted to be pivotally connected to the outer frame, and a rod turnably and telescopically received in the tube-like member. The transforming unit is operatively connected to a handle (on the inner frame) and the rod for, in response to angular movement of the handle, turning the rod between a first position in which the rod is prevented from being longitudinally or axially moved relative to the tube-like member and a second position in which the rod is allowed to be longitudinally or axially moved relative to the tube-like member.

Abstract: A rigid elongate bracket is provided which has at one end a disc-shaped lug generally corresponding to the lug on the door frame which is designed to interact with the door latch on the door of a vehicle, and has at the other end a hook-shaped member adapted to grasp the lug on the door frame, whereby the bracket can be fitted to hold the door in a partially open position while bodywork is being performed on the vehicle. The bracket preferably has a telescoping feature whereby the door edge can be anchored at different distances from the door frame.

Abstract: In a structure for removably mounting a support rod for an openable closure member such as engine hood, trunk lid or the like of a motor vehicle, a retainer member of a plastic material is mounted on at least one end of the support rod, and an anchor member of a plastic material which is adapted for engagement with the retainer member, is mounted in a mounting aperture formed either in the vehicle's body or the openable closure member. By virtue of the engagement between the retainer member and the anchor member, the support rod is removably retained with respect to either the vehicle's body or the openable closure member, thereby supporting the openable closure member at its open position.

Abstract: A locking bar (3) for use with a slideable panel (9), for example, sliding glass patio doors. The bar (3) includes first and second telescoping members (14 and 15) and a locking mechanism (16) at the point of attachment of the two members. The first member (14) is fixed against movement toward and away from the second member (15). The second member (15) is capable of telescoping movement relative to the first member (14). The locking bar further includes a bracket (19) for holding the second member (15) against movement relative to the slideable panel (9).

Abstract: The sliding deadbolt of a security door lock internally mounts a latching device engageable with the coupling element on the end of a flexible guard element retracted within a jamb-mounted, strike housing into which the deadbolt is projected for door locking purposes. Retraction of the deadbolt permits opening of the door to a limited extent by extension of the guard element from the strike housing in the jamb. Continued retraction of the deadbolt effects release of the latch device and retraction of the guard element.

Abstract: An adjustable bar lock for use between an abutment member and a slidable member. The bar lock includes a base attached to the abutment member and an adjustable bar comprising a rigid first link pivotally attached to the base and telescopically connected to a rigid second link. The second link has a free end adapted for abutting the slidable member with the bar in a locked position. A retainer clip adapted for attachment to the abutment member is provided for releasably securing the adjustable bar in a pass position, whereby the slidable member may be moved from a closed to an open location. The adjustable bar is foldable between the locked and the pass positions.

Abstract: A hingeless ventilator having a frame attachable to a wall of a compartment about an opening therein, a closure member swingable against a side of the frame for opening and closing the opening, guide members fixed to and instanding from an opposite side of the frame beyond opposite ends of the wall opening, and arms fixed to the closure member adjacent opposite ends thereof and instanding therefrom through the wall opening and a screen plate integral with the frame and screening the opening, in which the arms mount on oppositely projecting stub axles a pair of rollers each riding on a guide surface of the adjoining guide member and having for engaging that surface an elastomeric collar, and compression of the collars of the pair of rollers against the guide surfaces provides through the arms of the closure member the tensile force for holding the closure member against and in any selected position relative to the frame when swung to that position by a handle connecting and reinforcing the end portions of the

Abstract: A door structure (10) having a blocking element (19) selectively positionable to hold a door (13) in an open disposition relative to an opening (12) in a wall structure (11) to which the door is hingedly mounted. The door holding structure includes a blocking element (19) pivotally mounted at one end to one portion (21) of the wall structure (11) and provided at its distal end (24) with a magnetic element (31). The door (13) carries an electromagnetic device (33) which is selectively energizeable to releasably magnetically hold the plate (31) when desired. Energization of the electromagnetic device coil (40) is controlled by one or more switches (38,39). One illustrative switch is a proximity switch arranged to be closed as an incident of positioning of a door handle (36) of the door latching mechanism (35). The door holding structure is arranged to swing under gravitational basis to a retracted position providing free passage through the door opening (12) when desired.

Abstract: A device is provided for use with a vehicle having a body and a door movable between an open and a closed position for rigidly but detachably holding the door in a predetermined open position. The vehicle door is of a conventional construction having a latch mechanism in the door which engages a cylindrical striker pin secured to the vehicle body when the door is in its closed position. The device comprises an elongated rod having a striker pin secured to and extending laterally outwardly from one end of the rod. A pair of elongated tabs are secured to the other end of the rod so that the tabs extend perpendicularly outwardly from the rod with respect to the axis of the rod. In addition, the tabs are spaced apart from each other by an amount sufficient to receive the vehicle striker pin therebetween.

Abstract: A security bar for securely holding in a closed position a horizontally sliding door, such as a so-called patio door, for example, or a horizontally or vertically sliding window. The security bar of the invention consists of a massive metallic or plastic bar member, preferably square or rectangular in cross-section, pivotally supported at one end by means of a bracket from an inoperative position to an operative position wherein the free end of the bar member is supported by a clip with the longitudinal axis of the bar member substantially orthogonal to the rear edge of the frame of the sliding door or window and to a fixed structural surface such as the door or window jamb.

Abstract: A locking bar for use with sliding doors such as patio doors or the like, and permitting the sliding door to be securely locked either in a fully-closed position or in an ajar position. The locking bar includes a pair of telescoping members that are adjustably interconnected to have either a greater or a lesser length. One of the telescoping members selectably attaches to a keeper on the sliding door, and is nonremovably retained in the keeper whenever the shorter length is selected so that the door may be ajar, or optionally when the door is locked in the fully-closed position.

Abstract: A slidable door is fastened in a stationary relationship with respect to its door frame by a mounting plate rigidly attached to the frame, elongated socket connector pivotally mounted at one of its ends to the mounting plate and extending toward the door handle, and a locking element comprising a door handle engagement portion connected to the door handle and a tongue projecting therefrom and extending into the opening of the socket connector. The tongue and socket connector have interengaging lock elements that are biased into engagement with each other by a set screw and/or spring means.

Abstract: A cable lock for doors in which a loop at one end of a cable is attached by a bolt or screw to a building wall adjacent to a door and a larger loop at the opposite end of the cable is applied over and around a doorknob to limit the extent to which the door may be opened. In one embodiment of the lock, a metal sleeve encircles the major portion of the cable between the end loops. The metal sleeve increases the resistance of the device to cutting by bolt cutters, saws, and other burglary tools. A sleeve of resilient material encircles at least part of the cable between the end loops and serves to protect the door and door frame from damage upon contact of the cable therewith.

Abstract: The invention relates to a supplemental locking device for panel type doors which are mounted in a frame having top and bottom members and where one panel is adapted to open by sliding with respect to the other into a position adjacent the other door panel. More particularly, the apparatus of the invention includes a vertically disposed mounting post attached to the top and bottom door frame members and having a rigid bar pivotally attached to the mounting post so as to abut against or lock onto the handle or other part of the frame of the movable door so as to prevent the movable door from being open when the locking bar is perpendicular to the mounting post and in contact with the sliding door's handle.

Abstract: A railway car having an end opening includes a swingable folding door assembly provided with a keeper mechanism carried by the door assembly and the adjacent side wall of the railway car. As the panels of the door assembly are folded from a flat, closed position overlying the car end opening to a collapsed, open position disposed substantially longitudinally extended away from the end of the car side wall, a guide rod carried by the door assembly is arcuately displaced to simultaneously horizontally shift a vertical locking pin to a position overlying an aperture in a lock plate whereupon gravity concurrently drops the connected rod and pin to secure the open door assembly in a fixed position.

Abstract: A door holding latch, primarily for holding a door in open position, using a telescopic strut with an enclosed cam latch which engages when the strut is collapsed. The cam latch is incorporated in an end of a torsionally resilient rod which slides in a sleeve and engages a latch pin extending across the sleeve, the cam being angularly offset so that the rod must twist as the cam engages the pin. The torsion applied to the rod locks the cam in place, the latch being released by a pull on the door sufficient to overcome the frictional grip of the latch.

Abstract: A burglar alarm is disclosed which detects the unauthorized opening of a door or window. The device has a longitudinally adjustable rod which extends between the burglar alarm and the moveable portion of a closed door or window. An attempt to open the door or window activates the burglar alarm causing the alarm to sound. A built in detent within the burglar alarm holds the alarm in the "on" position until manually released. A releasable locking fabric mounts the alarm to an adjacent stationary door or window frame. The alarm is readily separated by hand from the releasing locking fabric for easy opening of the door or window in the event of an emergency requiring a rapid exit.

Abstract: A trunk retainer assembly for an automobile that provides a structure for holding the trunk lid securely when an oversized load has been placed into the automobile trunk compartment that necessitates the trunk lid being left in a partially open position. The trunk retainer assembly has an elongated strap and a buckle. The buckle has a strap attaching portion, an intermediate portion, and a mounting portion. The strap attaching portion has a pair of longitudinally spaced slots, one of these being a top slot and the other a bottom slot. These slots extend laterally with respect to the longitudinal axis of the strap attaching portion whereby the strap may be threaded through the top slot and then direction reversed 180 degrees so that it can be threaded downwardly through the bottom slot. The mounting portion of the buckle has an aperture adjacent its upper end through which a threaded bolt passes for securing the buckle to the interior of the trunk lid.

Abstract: A door lock mechanism for hopper cars includes a longitudinally extending operating rod actuated by a linkage means tripped by a track side cam. The rod in turn actuates cam locks by means of bell cranks which cause the locks to rotate and release transverse tension rods connected to doors for opening the same. The cam locks include cams engageable with teeth on the tension rods for securely locking the doors in a closed position. The operating rod also includes cam means effectively engaging the cam locks to positively lock the same in a closed position.

Abstract: A safety catch for a frontally opening hood of a motor vehicle comprises a resilient strip having transverse tongues at its upper end which snap engage in a recess in a bracket on the under side of the hood, the strip being capable of limited vertical movement and being anchored elastically at its lower end. Snap engagement of the tongues in the recess is facilitated by curvature of the upper end of the strip in the longitudinal direction of the vehicle, and release of the catch is effected by exerting finger pressure on the resiliently flexible strip to disengage it from the recess.

Abstract: An automobile trunk lid holder comprising a rod with an engagement means at each end capable of gripping in opposing directions and an offset intermediate therebetween, wherein the offset means allows one of the engagement means to engage the trunk lid with a gripping action and further allows the other engagement means to engage the trunk lid frame with a gripping action in a direction generally opposite to that of the first engagement means.

Abstract: A door support bracket includes a slide member telescopically inserted in a housing bracket member. The housing bracket member is attached to a horizontal hung door by means of a swivel bracket. The free end of the slide member is pivotally attached to the frame for the door. The housing bracket member is formed from an elastic material and cooperates with cam members on the slide member to hold the door in an open position.

Abstract: A window safety system for a window having a frame with a head, a sill, and side jambs defining a sash receiving opening, and a sash member mounted in said opening for pivotal movement about a vertical axis between closed, opened and reversed positions relative to said frame, said safety system including a releasable latch assembly spaced intermediately of said pivot axis and one of said jambs for selectively interconnecting said frame and said sash for limiting the initial opening movement of said sash out of said closed position to a ventilating position, said latch assembly being key releasable for permitting further free swinging opening movement of said sash member toward a fully reversed and latched position for window washing.

Abstract: A door lock for use with an auxiliary door holding mechanism that is in addition to the conventional door lock. An auxiliary door holding plate is adaptable to be locked and unlocked from outside the door by means of a conventional key-actuated driver bar. The door holding plate may also be locked from inside the door. The door holding plate also permits the door to be held against further opening from a partially open position. In one of the embodiments of the invention a device is employed for swinging the auxiliary locking plate from an unlocked position to a locked position by the closing movement of the door. By another embodiment of the invention the auxiliary locking plate is moved from unlocked position to locked position from outside the door after the latter has been closed.

Abstract: A vehicle door assembly having a safety latch mechanism is disclosed, wherein the assembly includes a door having an inner and outer side, a frame for the door, hinges connecting the door to the frame, latch means for latching the opposite side of the door to the frame to restrain the door against pivotal movement, the latch means including mating male and female elements on the frame and door respectively. The latch means are operated by door handles, on both the inner and outer sides of the door, which serve to disengage the female element from the male element so that the door may be opened. The male element is mounted on the door frame by a retaining element, such as a shear pin, which under conditions of abnormal stress, such as in an accident, can release the male member from engagement with the door frame. One end of the male element is connected to a cable, which is connected at its other end to the door frame, and which is at least 3 inches longer than required for assembly.

Abstract: A hinged unit that serves as a security door step to prevent opening of a slidable door. The unit consists of a pair of bars pivotably linked together at adjoining ends and of a length to fit in the extended position, between an external bottom side edge of a slidable door and the bottom side edge of the door frame within the bottom channel in which the door slides to block movement of the door in the closed door position. The hinge line is located below the horizontal longitudinal axis of the joined bars in the extended position. A pivoted kicker plate is pivoted to one bar so that downward pressure on the kicker plate serves to raise the hinge point above the horizontal axis so that the bars will fold upward about the hinge point to permit the bars to fold against the door frame along a vertical axis as the door is opened.

Abstract: A door safety latch permitting the partial opening of a door consisting of an arcuate lug mounted on the door, and having an enlarged ball portion mounted on the end thereof, with a fastening member mounted in the door frame having a pivoted yoke portion whose spaced apart leg portions prevent the ball portion of the lug from passing therethrough. At the pivoted end of the yoke portion, the leg portions are sufficiently spaced apart to permit the ball portion to pass therethrough. When the door is in a closed position and the safety latch swung to the position to permit only a partial opening of the door, the arcuate lug will extend through the space between the leg portions.

Abstract: A door holding apparatus has rotatable and pivotal holding means that is spring biased for contacting a catch and is positioned generally along a plane of an adjacent structure in a stored position and contacting and maintaining a door at a preselected location at a door holding position.

Abstract: A door lock, requiring no penetration of a door leaf for unlocking from the outside, comprises a keeper secured to the inner surface of the door leaf, a housing slidably articulated to the keeper by two pivot studs, and a detent on an adjoining door post engageable by a pair of spring-loaded levers in the housing whose fulcra are a pair of pins normally immobilized by a retaining disk. With the door closed and the detent engaged, the housing fits around the keeper and can move away from it to a limited extent, allowing the door to be opened slightly, unless a handle on the housing is turned into a latching position engaging a bolt fixed to the keeper. Unlatching of the door from within, by reverse rotation of the handle, also disengages the levers from the detent so that the door can be opened wide. When the door is opened from the outside, its leaf is held ajar by the housing whose handle cannot be rotated in this position since the levers are blocked by the pivot studs.

Abstract: An elongated wedge member is pivotally supported at its minor dimension end on the free swinging edge of a door for swinging relative to the door about an axis generally paralleling the axis about which the door may be swung and for movement of the wedge member between first and second active and inactive positions with the wedge projecting outwardly of the inner side of the door and swung toward the hinged edge of the door overlying the inner side thereof, respectively. In addition, an elongated tapered and open-sided channel member is provided and has its minor dimension end pivotally supported from the jamb of the aforementioned door for swinging about an axis generally paralleling the pivot axis of the door and movement between first and second active and inactive positions with the channel member projecting outwardly of the inner side of the jamb and swung away from the door overlying the inner side of the jamb.

Abstract: A window stay comprising an attachment part and an elongated stay bar, the attachment part having pivoted therein a headed pin through the end of which extends a transverse pin on which the stay bar is itself pivoted the further pin occupying a position adjacent to a spigot formed on the attachment part to prevent the pin becoming detached from the attachment part.

Abstract: A device comprising a securing means and a latching means for latching a door in a pre-determined position of rotation relative to a frame associated with said door when rotating the door in one direction. Means is securely attached to the door and arranged to coact with the door at its upper horizontal edge surface. The latching means extends from the securing means in the form of a horizontally or substantially horizontally extending portion. The securing means and the latching means are pivotally arranged relative to each other and exhibit locking means, which are adapted to co-act with each other so that the latching means is able to adopt one of two position of rotation relative to the securing means. A first position of rotation in which closing of the door 1 is prevented and a second position of rotation in which the door is free to close. The securing means and the latching means are formed integrally of a plastics material.

Abstract: A fastening device for wings, specially for windows, for lockable closure and lockable holding of the wing in one or more opened positions, which device comprises a movable arm which has one end connected to the wing of the window. The arm forms a channel and has a longitudinal slot in communication with the channel, and a plurality of spring loaded locking means are placed in a row in the channel. Upon introduction of a latch through the slot in an upward direction into the channel between two locking means, the latter are moved apart under spring action, whereupon at least one of the two locking means engages an engagement surface of the latch inserted in the channel. A screw spindle is screwed into the other end of the arm, and the two locking means are arrestable, in the position in which they engage the latch introduced into the channel, by such a displacement of the screw spindle that the spring action is abolished.

Abstract: A security device for windows comprising a first tube member pivotally secured at its lower end to the upper end of the lower window unit and having a second tube member slidably received on the upper end thereof. The upper end of the second tube member is pivotally secured to the window frame or to the upper end of the upper window unit. The first tube member has a plurality of spaced-apart openings formed therein which are adapted to receive a bolt extending therethrough. The window units may be moved relative to the window until the bolt engages the lower end of the second tube member to prevent further movement.