Abstract: A parallelogram gate for controlling traffic on a roadway, comprised of an arm assembly that is rotatable between a raised position and a horizontal, longitudinally-extended, roadway blocking position, a housing, and a drive assembly mounted within the housing. The arm assembly has parallel, elongated upper and lower rails, and a plurality of spaced-apart pickets pivotally attached to the upper and lower rails. A stationary pivot attaches a pivot end of the upper rail to the housing. A pair of vertical, grooved channel guides are attached to the housing at a location within the housing that is intermediate the stationary pivot and a lower portion of the housing. The drive assembly includes a hydraulic cylinder having a vertically-upward directed piston arm and mounted to the lower portion of the housing. A horizontal pin inserted through a traveling clevis carried by the piston arm, and inserted through a pivot end of the lower rail, extends into a groove within each of the guides.

Abstract: A crossing guard is disclosed which comprises an operator positioned on one side of a thoroughfare for raising and lowering an arm, a gate connected to the arm, a first lock positioned on the opposite side of the thoroughfare, a plurality of cables supported within the gate, joined together at fixed points intermediate the ends of the cables, and a first end assembly connectable with the cables and the gate at the end of the gate opposite the operator with the first end assembly engagable with the first lock. The device further comprises a second lock positioned on the side of the thoroughfare nearer said operator engagable with a second end assembly positioned on the end of the gate nearer said operator.

Abstract: A marker post formed of a resilient materiel which is normally bendable without breaking, with the resilient material arranged in a triangular cross shape with internal webs therein to impart sufficient rigidity to the marker post to enable the marker post to be driven into most soils with the internal webs coacting to provide a restoring force to enable the marker post under many field conditions to return to a normally straight condition.

Abstract: A secure vehicle parking space is provided with an adjustable barrier comprising a post that is located on the floor of the car space at the entry end. The post is movable from a prostrate position to an erect position and then is movable longitudinally of the car space toward the vehicle. A sensor in the post senses the distance of the post from the vehicle to locate the post a predetermined distance from the vehicle. The advantage is that a vehicle of any length can be securely restrained using a single erect post. The system is adapted for use with coin operated or other secure locking mechanisms.

Abstract: An attachment is provided for a safety gate that is positioned to close the opening in a catwalk to allow access to and from a ladder or stairs. The gate is urged to the closed position by springs. The improvement is an attachment for connecting to the lower side of existing gates to prevent workmen using the catwalk from slipping under the gate and falling into the opening for stairs or a ladder.

Abstract: As improved collapsible bollard is disclosed to control vehicular traffic. The present invention is comprised of a base that has at least one bore, a carriage having at least one bore that corresponds to the bore in the base. There is at least one impact release insert. The impact release insert is seated in the bore of the base. A fastening means is used to secure the impact release insert and the carriage to the base. A sleeve is removably fastened to the carriage. The sleeve has a free floating insert lock, a bias means, and a pulley system. The bias means of the sleeve is positioned to cause a downward bias against the free floating insert lock. The free floating insert lock is attached to the pulley system such that said pulley system is able to move the free floating insert lock in a direction that is opposite to the bias means. In the event the present invention is struck extremely hard, the sleeve will shear from base and the sleeve will typically be unharmed mechanically.

Abstract: A vehicle trafficway controller characterized by a person friendly driver intimidating wrong-way traffic condition for causing vehicle tire tread damage, having a vertically extensible tire tread piercing member shiftably carried by a frame and with a retractile tread piercing point, and a movable person protective cover isolating said point when in said person friendly driver intimidating wrong-way traffic condition, and exposing said tire tread piercing point to a tire tread rolling thereover, the tire tread piercing member being frangible and/or extended and retracted.

Abstract: A warning sign, having a vertically elongated housing mounted onto shelving with the housing extending a short distance laterally and perpendicularly from the face of the shelving, the housing preferably having advertising or other indicia positioned on opposing face members and a pocket which receives a pivoting warning arm, where the warning arm is hidden within the pocket in the vertical position but can be pivoted into an exposed horizontal position to extend laterally from the shelving to warn customers of hazardous conditions in the aisle. The sign is mounted with a hinged bracket having a non-vertical pivot axis, such that the sign will automatically resume a neutral position perpendicular to the shelving if it is pushed or pulled to either side.

Abstract: A gate barrier which includes a first post, a drive shaft and a driven shaft revolvably supported on the first post at different elevations, a second post disposed in parallel to the first post, the second post having at least one angled holder plate, and a folding collapsible barrier having a fixed end fixedly connected to the drive shaft and the driven shaft and a free end for resting on the at least one holder plate at the second post, the folding collapsible barrier being extended out when lowered with its free end rested on the at least one angled holder plate at the second post, the folding collapsible barrier being collapsed when lifted from the second post to a vertical position in vertical alignment with the first post.

Abstract: A vehicle security gate apparatus and methods are provided for inhibiting undesired access to a protected area. The vehicle security gate apparatus preferably has a barricade adapted to be positioned adjacent a roadway to thereby block vehicle passage along the roadway into an area desired to be protected. The apparatus also preferably has a barricade rotating mount connected to the barricade for rotating the barricade about a predetermined axis so that the barricade rotates about the predetermined axis between a vehicle passage position which allows a desired vehicle to readily pass along the roadway into the protected area, a vehicle blocking position which blocks the roadway so as to inhibit an undesired vehicle from readily entering into the protected area, and a vehicle arresting position which arrests an undesired vehicle responsive to an attempt by the undesired vehicle to ram the barricade when the barricade is positioned in the vehicle blocking position.

Abstract: A safety pole is comprised of a strip of plastic material having a normal elongated hollow cylindrical condition with overlapping longitudinal edges. A motor driven drum is mounted within a canister adapted to be recessed in the ground in spaced relation to a loading dock with the strip of plastic material connected at one end to the drum whereby the strip of plastic material may be wound on the drum in a flattened condition or extended vertically upwardly to form a pole. A loading dock is provided with a door and the operation of the motor driven drum is coordinated with the operation of the door so that when the door is open, the pole will be in the extended visible condition to warn a truck driven not to approach or leave a loading dock.

Abstract: An assembly, preferably comprising a clearance pole, includes a first pole element with a first horizontal portion and a second vertical portion, and a second tubular pole element mounted to the ground, extending vertically, and receiving the first pole second portion. The first and second pole elements are mounted so that the first element is rotatable with respect to the second about a vertical axis. The slanted surface of an ultra-high molecular weight polyethylene block acts as a cam follower engaging a rod, bar, or tube which acts as a cam, the structures biasing the first pole element first portion to a home position. A dry lubricant is provided between the pole element bearing surfaces to provide relatively friction-free rotation between them.

Abstract: A removable and collapsible barricade post assembly for the restriction of vehicular traffic. The barricade post assembly has a novel base assembly that allow the post assembly to be removed from its mounting bracket which is normally permanently affixed to the ground. Alternatively, the post assembly can remain attached to its mounting bracket while being lowered to allow the passage of vehicular traffic. The barricade post assembly has a number of security features to restrict the unauthorized removal or collapsing of the barricade post. A cover assembly to enhance security and to provide weather protection for the barricade post assembly is also described.

Abstract: A breakaway assembly comprises a first assembly member adapted for connection at one of its ends with a movable member of a vehicle barrier device, and a second assembly member adapted for connection at one of its ends with a gate arm of the vehicle barrier device. A breakable member is releasibly connected at one of its ends to the first assembly member, and is releasibly connected at an opposite one of its ends to the second assembly member. The breakable member is constructed so that it preferentially breaks between the first and second assembly members in response to a determined impact force imposed on the gate arm to spare the gate arm from serious damage, to ease and expedite repair operations, and to reduce the costs associated with maintaining and adequate inventory of replacement parts.

Abstract: A 90.degree. gate opener (20) includes a screw (22), and a nut (30) which travels along screw (22) as the screw (22) is turned by a motor (46). One end of a main arm 32 is pivotally connected to nut (30) so that it also travels along screw (22). Screw (22) is dispositioned a predetermined distance (D) behind a pivot (38) which slidably receives main arm (32). As screw (22) is turned, main arm (32) rotates approximately 90.degree. about pivot (38), and in so doing also slides through pivot (38). As a result of the increased mechanical advantage of the gate opener, a motor of smaller horsepower rating may be utilized. Gate opener (20) may be used in either horizontal or vertical applications.

Abstract: A retractable post that can be raised and lowered and stored in retracted subsurface position such that the post will be out of the way. The post can be extended to an upright position and locked in that position by a specific lift, twist and set locking mechanism. The post is lowered by a specific lift, twist and lower sequence in a somewhat reverse order. The post is typically used with a sign such as no parking, handicap parking, area closed or other such uses. The retractable post is designed so the post can be lowered for area maintenance such as snow removal or for general closing and opening access to restricted area. In a simple configuration of the retractable post, the retractable post contains a housing, a sleeve stabilizer attached to a top of the housing, a post having an elongated flat surface, a locking notch, a turning groove and a stabilizing end, and a D-block. The D-block has a D shaped opening that interacts with the turning groove on the post to allow the post to rotate.

Abstract: A barrier for a roadway has an upright (1), a barrier arm (9) fitted on a horizontal drive spindle (2), a pivoting mechanism and a balancing spring (8) supporting the opening and closing movements of the barrier arm (9). The balancing spring (8) has an untensioned zero position (0) between the blocking position (S) and the open position (F) of the barrier arm (9).

Abstract: A vehicular traffic controller is disclosed wherein the control mechanism is positioned beneath the road surface. A plurality of transversely spaced levers extend upwardly from the surface. The levers are coupled to a shaft journaled for rotation below the road surface. Shaft rotation and lever retraction is effected by an operator to withdraw the levers to a position beneath the surface. Each lever is provided with a tire disabling member. A vehicle traversing the control point with the levers extended imparts rotation to the levers and causes the disabling members to damage the vehicle tires.

Abstract: When a post 10 is hit by a car in the direction indicated by arrow 42 the post moves a restricted amount in the direction of that arrow and that movement causes a support member 34 to be lifted up to raise the front wheels of the car off the ground. A plate 58 is secured to the underside of the support member 34 and, during raising of the support member 34, the plate passes over a series of notches 56. However, the plate 58 abuts those notches 56 to prevent the support member 34 moving downwardly again.

Abstract: A vehicle control gate arrangement pivotable to a position for restricting flow of vehicular traffic where the gate is generally elongate and can include a tubular shell and a core member where the shell is more flexible than the core and contacts the core substantially continuously around the periphery of the core. The core can be terminated toward the distal end of the gate so that the shell extends outwardly from the termination of the core so that vehicles attempting to bypass the end of the gate but failing to do so, strike the flexible end of the gate so the gate is not damaged or knocked down. An arrangement is also provided to include a gate composed of one or more sections connected to an adjacent section or to a pivot by a joint assembly which releases the outermost section in the event the section is struck by a vehicle attempting to or accidently going through the gate.

Abstract: A railway gate arm assembly including a gate arm which is mounted to permit pivoting about a longitudinal axis when an external force is applied to the gate arm thereby causing the latter to swivel out of a vertical plane, and at least two torsion springs, one mounted on each side of the gate arm and having depending spring legs which engage against corresponding sides of the gate arm and bias the gate arm to a vertical position so if the gate arm is caused to swivel out of a vertical plane by an external force, it will be returned to the vertical plane by the depending spring legs when the external force is removed.

Abstract: A vehicle barrier in which two arms (6, 10) linked by a linking member (14) are pivoted to a base structure (1) so that they collapse into a recess (5) in the structure to "open" the barrier. To close the barrier the arms are raised and may be latched and locked in place, the arms and structure preferably forming a triangular shape when erect.

Abstract: A restraining barrier assembly is positionable across a roadway in a deployed position to define a restraining zone and may be moved vertically to a passive position. The barrier may be a rectangular net with wires (or cable) (21, 22, 23) spanning the net and a lower wire 24 below the net assuring effective trapping of autos and trucks of a variety of heights (of the vehicles and of their forward bumpers, hood and driver compartment sections) and a variety of spans between their bumpers and their forward wheels. Vertical strips (25, 26) are provided at intervals along the span of the barrier to maintain spacing of the wires from each other and relative to ground level. The lowest wire (24) is set back from the plane of the barrier that includes the mid-height and upper wires.

Abstract: A system for above grade and below grade installation, for rendering the mass weightless in preparation to being lifted subject to its mass inertia, wherein a pre-charge is applied to the pneumatic end of a pressure accumulator at a pre-set pressure, and an adjustment made charging the other end of the accumulator with a working fluid for balancing the mass as required against gravity and with a volume of working fluid to ensure operation, the pre-set gas pressure being increased by the adjustment to apply a working pressure for counterbalancing the mass above and below its weight as required.

Abstract: A ramped barrier is provided to control movement of motorized vehicles into designated areas. The ramped barrier can be mounted on a road, parking lot, driveway or other surface. The barrier is provided with a series of parallel tines secured to a rotating shaft. The tines form a tire piercing barrier against unauthorized traffic. The shaft is housed within the barrier and adjacent to the top wall of the barrier. The tines, when retracted, extend from the shaft to about the outer edge of one ramped side of the barrier. The tines can be positioned to project upwardly against vehicular traffic in one or two directions.

Abstract: A removable post assembly for securing an area including basically four parts: an underground base member, a removable post member, a hinge assembly and a locking mechanism. The underground base member includes a housing that partially receives the post member and an anchorage assembly mounted to the housing assembly. The hinge assembly includes two leaves and one of them is pivotally mounted to the housing at a position substantially adjacent to the ground level. The locking mechanism locks the other hinge leaf to the removable post member. A cover is rigidly mounted to the post member so that it houses the locking mechanism thereby protecting it from tampering. The cover includes a bottom opening that permits a user to insert a key or otherwise release the locking mechanism. The bottom opening is sufficiently close to the ground level to prevent the introduction of any tampering tools.

Abstract: A removable barrier gate to block a driveway or doorway, that has at least two crossmembers that attach to either side of the opening, and a linking member that connects the inner ends of the crossmembers together, forming a continuous barrier across the opening.

Abstract: A motorized retractable speed bump or warning device wherein the raising and lowering of the retractile is controlled by multiple remote means from signals generated by traffic conditions. The motorized retractable speed bump, wherein a retractile comprising of bi-folding hinged plates, which are elevated to present a visible obstruction to motor vehicles, and a position restraining device, operated by rotary and or linear motor drive means, by on/off manual push button switching, or through a series of Programmable Logic Controllers, by way of analog or digital signals emanating from permanently mounted speed detecting devices.

Abstract: The invention provides a device which includes a bracket to be firmly embedded in a driveway; and includes a post which is adapted to be slidably seated in the bracket in a vertical position to serve as an obstruction to passage of a motor vehicle from the driveway. An Ell-rod provided in the post is manually operable to interlock the post against removal from the bracket, and is adapted to be locked in the interlocked condition by a padlock. The ell-rod is manually operable upon removal of the padlock to release its interlocked condition so as to allow removal of the post from the bracket to enable vehicle passage over the driveway.

Abstract: A retractable boundary mark, particularly a road boundary mark, comprising a movable boundary mark body (5) which can move inside a corresponding housing or casing (4), whose upper side is open, from a working position wherein said body (5) fixedly extends above the level of the open end of the housing (4) to a resting position wherein said body (5) extends so that its top is approximately level with the housing (4) open end, characterized in that the body of said movable boundary mark (5) forms an integrated electric distribution point which is supplied by a source of electric power (20) so that at least one current consumer (21, 22) can work, said consumer being placed on the body of the movable boundary mark (5) or connected to the latter thanks to a cable (23).

Abstract: A speed controlling unit for maintaining a traffic hump in a raised position for a limited time to discourage vehicles from exceeding a threshold speed. The speed controlling unit includes a first surface (15a,415a,515a,615a) adapted for actuation by a moving vehicle, a second surface (15b,415b,515b,615b) which constitutes the traffic hump, and mechanical control structure (16,26; 416,426; 516,526; 616,626) for temporarily supporting the second surface in its raised position. An assembly of the speed control units may be arranged side by side across a traffic lane.

Abstract: A security post for automobiles vertically disposed in the ground to allow or prevent access to a particular area. The post is manually withdrawn form the ground and secured in place with a securing bolt and lock. Guides on the post provide and easily slidable member within a sleeve that is disposed in the ground. A cover is provided for preventing the accumulation of dirt or other foreign particles on the top of the post and sleeve.

Abstract: This is a device which will be part of a railroad highway crossing gate system to prevent gate-arms from being knocked out of their support members by contact with vehicles either by accident or on purpose. The device will allow the gate-arm to be pushed out of position with the traffic flow and return to its normal position when released by the vehicle in contact.

Abstract: A vehicle barrier having a vehicle barricade and a cooperating signal barrier for roadways or the like is provided. The vehicle barricade is pivotally connected to a housing, and is pivotal between a first generally horizontal position and a second angularly disposed position. A signal barrier cooperates with the vehicle barricade, and pivots between a first generally vertical position and a second generally horizontal position. A linear actuator is operably associated with the housing. A transmission is operably associated with the linear actuator and the vehicle barricade and the signal barrier for converting linear movement into pivotal movement of the vehicle barricade and signal barrier so that the barricade and the signal barrier pivot between the first and second positions.

Abstract: The invention relates to a self-contained bollard device of variable height for dispensing electricity supplies or various fluids, the device comprising vertically movable equipment, supporting a bollard, which contains a co-axial rotary shutter. Rotation of the shutter, which is controlled by a lock with pins, presents a dispensing surface to the user or closes the window of the bollard. A single wrench-type key controls holding of the bollard in the raised or lowered positions, and also rotation of the shutter, by means of two identical locks. The bollard includes safety devices, in particular to interrupt the electricity supply when the shutter starts to rotate or the bollard starts to descend, and also in the event of a shock. The field of the invention is that of street furniture, and in particular for equipping places open to the public, such as marketplaces, camping sites, quays or piers, and service stations.

Abstract: A service bypass apparatus for isolating a door from an automatic door operator on a passenger transit type railway vehicle, and lock such door in a closed position, which includes a partially rotatable shaft having a blocking lever arm rigidly secured to the rotatable shaft which can be pivoted into a position sufficient to block the door from opening. The shaft is also provided with at least one cam adapted to operate at least one switch which will electrically and pneumatically isolate the door from the automatic door operator, and activate whatever bypasses are necessary to permit other door operators to function in their normal manner. A remote control apparatus is also provided which includes a partially rotatable cylinder with a closed-loop cable interconnecting the rotatable cylinder and the shaft, so that any partial rotation of the cylinder will cause a partial rotation of the shaft as necessary to isolate the door from the automatic door operator.

Abstract: A barrier for a loading dock having an opening in a wall having a dock leveler positioned in a floor of the loading dock adjacent said opening. The dock leveler has a horizontal position where traffic may cross to adjacent areas of the loading dock. A support is located along a side of the dock leveler. A deformable barrier arm is pivotedly connected to the support by a mounting for movement between a horizontal blocking position and a raised vertical position exposing the opening. The mounting has a pivotal connection to the support to permit the deformable barrier arm to move in a vertical arc for raising and lowering the arm and a loose connection to the barrier arm to permit relative motion between the barrier arm and the mounting upon the application of a horizontal load to the barrier arm.

Abstract: A barrier for the protection of reserved areas including at least one upper element (1) rotatably mounted relative to a lower element (6) anchored in the ground (G). An elastic return spring (18) is interposed between the upper and lower elements (1,6). The upper element (1) is adapted to be displaced to either side of an upright reference position by rotating about a horizontal pin (2) provided on the lower element (6). A releasable mechanism selectively blocks rotation of the upper element in a first direction (F2) and a non-releasable mechanism blocks rotation of the upper element in the reverse direction (F1) at the end of a limited angular deflection. The elastic return spring provides a force opposing the limited deflection in the reverse direction.

Abstract: A railroad crossing gate has an arm that is capable of swivelling axially when a force is applied, rather than breaking. The gate arm is substantially resistant to breakage caused by high winds and contact with the tops of vehicles. In addition, a broken gate arm is easier to replace than in a traditional railroad crossing gate. In a preferred embodiment, the improved gate arm is attached to the gate mechanism through a swivel bracket, and is maintained in a preferred orientation by gravity.

Abstract: An arrangement with a barrier device pivoting between a position preventing the access to a reserved area and an access clearing position, comprising two bow-shaped pivot arms, a drive device for pivoting the barrier device and means for actuating this drive device, wherein the drive device comprises a lever with two arms of different lengths which is mounted for swinging about a pivot device, the short arm being connected to the barrier device for pivoting same when the lever is pivoting about said pivot device whereas the actuating device acts upon the end of the long arm, the invention being applicable to barrier arrangements for car parking places.

Abstract: A pop-up traffic control device (10) is raised above or withdrawn below the pavement surface through a bore in the cover (18). A lead screw (16), rotated by power source (30), raises a traffic marker tube (12) by a follower tube socket (14) attached to the lead screw (16). The follower tube socket (14) moves vertically on the lead screw (16) and is rotated to either raise or retract the traffic marker tube (12) above or below the roadway. The interior of the traffic control device is sealed from external foreign matter by a linear tube (48) in the cover bore surrounding the traffic marker tube (12). The traffic marker tube (12) is easily replaceable. Additional features include: a slope adjustment mechanism, a heating unit (74), a lead screw lubrication/cleaning arrangement (80, 82), lighting units (84) for the traffic marker tube (12), a watertight coupling (90, 92), a variable-speed arrangement for the lead screw rotation, and a marker tube status signal unit.

Abstract: A drive mechanism for a pivoted member (1), such as a beam of a traffic barrier, comprises a rotary element (6) coupled to the pivoted member (1). A friction roller (7) for driving the rotary element (6) is supported on a mounting (8) that is pivoted on an axis (9) and biased about the axis (9) to hold the friction roller (7) in pressure contact with the rotary element (6). When the friction roller (7) is driven to rotate the element (6) to raise the pivoted member (1), the frictional force between the roller (7) and the driven element (6) is increased, whereas the frictional driving force is reduced when the roller (7) is rotated in the reverse direction.

Abstract: An improved hurricane shutter is disclosed. The shutter is of the type in which a plurality of interlocking corrugated panels are attached between a header above the opening and a sill below the opening. The corrugated panels extend beyond lateral edges of the opening, so that they cover the entire opening. The hurricane shutter is improved with a reinforcement bar extending substantially parallel to and midway in between the header and the sill of the opening. The bar is additionally attached to the wall structure next to the opening. A concomitant method for improving the strength of a hurricane shutter assembly is also disclosed.

Abstract: Theft preventing means at a parking lot comprising a hindrance means (10, 30) raisable from a retired position and lockable in a raised position. The hindrance means comprises a tubular part (10) depressed into the ground at the parking lot, and a post (30) telescopically mounted therein. The post (30) has a slot (40) in which a catch (41) is pivotally mounted between an inner position, in which the catch is accommodated within the cross section of the post and an outer position in which the post is prevented from being pushed down in part (10), on the post. An opening (44) is arranged in the catch (41) for receiving the clamp of a padlock.

Abstract: A vehicle anti-theft parking space device including a vertically slideable post telescopingly received in a receptacle base securely mounted underground from ground level in a driveway and the like so that the post can be raised and locked in the raised position above ground level by a padlock to prevent unauthorized movement of a vehicle parked on the driveway. A spring mechanism is disposed between the post and the receptacle base to maintain the post in the raised position in a vertical alignment with the receptacle base. A hasp is pivotally mounted within the post so that the hasp can freely pivot through a slot in the post into a horizontal position extending outwardly from the post, and secured in the horizontal position by the padlock so that the post cannot be lowered into the receptacle base. The hasp is pivoted back into the post, when the padlock is removed, as the post is being lowered into the receptacle base. A handle is provided for pulling the post up to the raised position.

Abstract: A barrier system works in conjunction with an automatic fee collection system to prevent persons from gaining entry to a fee-paid area without payment of the required fee. The barrier system includes a physical barrier that controllably blocks a passageway through which the person who attempts to gain access without payment must move. A barrier actuator controllably drives the physical barrier from the open to the closed position under the direction of a controller. The controller receives sensor signals that warn of an attempt to gain admission without payment, processes those signals through a logic that prevents unauthorized admission, guards against injury to persons by operation of the physical barrier, and permits exit through the barrier system.

Abstract: A parking prevention means comprises a housing (1) containing a power supply, a controller signal receiver unit, said signals controlling a motor coupled to a shaft (8) bearing a movable part (2) which the motor moves from a substantially horizontal position to a substantially vertical position and vice-versa. The movable part comprises one or more legs (3) which are substantially nondeformable and also includes means enabling the shaft to impart its rotational movement to the movable part, whereas rotation of the movable part caused by an external force does not result in associated rotation of the shaft.

Abstract: A gate bar for a toll gate apparatus includes a tubular member surrounded by a sleeve of resilient material. The sleeve is protected by a sheath which may be painted to improve the visibility of the bar.

Abstract: A security gate system including a supporting structure and a gate mounted on the supporting structure for pivotal movement about a generally horizontal pivot axis between a closed position and an open position. A drive wheel is rotatably mounted on the supporting structure and is drivingly coupled to the gate so that rotation of the drive wheel in a gate opening direction drives the gate from the closed position to the open position. A first motor drives the drive wheel and a releasable lock releasably holds the drive wheel against rotation in the gate opening direction. A second motor moves a locking member of the releasable lock to a releasing position to allow the gate to be moved to the open position. The gate system may include two of the gates having operators sharing the same supporting structure.

Abstract: A vehicle barrier includes a barrier plate pivotally attached to a base support for movement between a horizontal non-operative position and an angularly operative position, a brace extending rearwardly from a pivotal support secured to a rear surface of the barrier plate and spaced from a barrier pivot disposed on a front of the base support, a brace stop device mounted on a rear of the base support, and operating mechanisms for raising and lowering the barrier gate and associated brace from horizontal non-operative positions to angularly operative positions and vice-versa. When the barrier plate is in its angularly operative position, a rear end of the brace abuts the brace stop device so that the brace is in an inclined position. The brace lies in a substantially horizontal plane and is out of engagement with the brace stop device when the barrier gate is in its horizontal non-operative position.