Abstract: A base member and a fascia are assembled to form a hollow door section which is filled with insulative material. Adjacent sections are coupled along respective longitudinal edges for angular and spatial displacement. The base member is extended from a selected plastic with male and female coupling components extending continuously along respective longitudinal edges. A plurality of mounting members projecting from the lateral edges of the sections matingly and slidably engage the semi-cylindrical guide surface of a tract for reciprocal vertical movement of the door. The door may be partially raised for spatial displacement of the sections whereby flow-through ventilation openings are exposed. In a specific embodiment, a flexible drive screw is rotatably carried within the track for powered operation of the door. In alternate embodiments a generally tubular door track is either grasped by a door guide apparatus having a clip, or the guide is slit and a rounded guide rides within the track.

Abstract: A hinge for transferring power between a wall jamb and a door. The hinge includes a pair of hinge leaves having interleaved knuckles axially aligned to share a common bore and engaged to allow the door to rotate. At least one cable enters a recess in a rear surface of one hinge leaf, passes through a longitudinal passageway in the hinge leaf, across the common bore, through a longitudinal passageway in the other hinge leaf, and exits a recess in the rear surface of the other hinge leaf. The passageways are aligned or accessible from the common bore and have tapered openings to enable the cable to be routed or fished after the hinge is mechanically assembled.

Abstract: A microwave oven includes a main body forming a cooking chamber, and a door hinged to the main body for opening and closing the cooking chamber. The main body includes upper and lower horizontal walls forming a top and bottom, respectively, of the cooking chamber. The door is mounted by two hinges, each hinge comprising a pivot pin carried by the door, and a hinge plate carried by the main body. Each hinge plate includes a door-connecting section and a body-connecting section interconnected by an intermediate section. All three of those sections are integrally formed on a one-piece element. The door-connecting section is at a higher elevation than the body-mounting section and includes a hole rotatably receiving the pivot pin. The body connecting section is directly connected to a respective one of the upper and lower horizontal walls. The door carries a stop element which abuts a vertical edge of a respective hinge plate when the door is in an open state.

Abstract: An apparatus for providing an electrical connection from a power source, through a stationary door frame, into a door to connect to door-mounted electrically-operated hardware, includes an electrical junction box installed in a mortise cavity in the door frame adjacent to a similar electrical junction box installed in a mortise cavity in an edge of the door. The junction boxes are adjacent each other when the door is in a closed position; and a housing is installed in each junction box, each housing having a longitudinal slot in a face plate thereof of a length substantially equal to the length of the junction box. A cover plate is longitudinally slidably engaged in grooved fingers on a rear surface of the face plate, the cover plate having a substantially circular hole.

Abstract: Radio noise in an automotive vehicle is suppressed by grounding the hood of the automotive vehicle with a conductive washer. The conductive washer is concave and is disposed around a rivet used to pivot a hood hinge component to a body hinge component. When the rivet is set, the hinge components compress the washer so as to permanently load the washer to thereby ensure continuous grounding of the hood to the body. Preferably, the rivet is coated with a dry lubricant, such as TEFLON.RTM., which does not flow away from the rivet to interfere with electrical contact between the washer and hinge components.

Abstract: A hinge fastens a display screen to a keyboard base, and uses a frictional force generated by one or more compressed friction washers to control angular motion of the display screen with respect to the keyboard base. The hinge includes two shoulders defining inwardly-facing flat abutment surfaces separated by a first distance, the two shoulders being disposed on the keyboard base, and a knuckle having a pair of outwardly-facing flat abutment surfaces separated by a second distance which is less than the first distance, the knuckle being disposed on the display screen. Also included in the hinge is at least one compressible friction washer, disposed between the knuckle and the two shoulders, and having a thickness which is greater than a difference between the first distance and the second distance, but which is compressible to less than the difference. Each of the two shoulders, the knuckle, and the at least one compressible friction washer has an alignable throughbore.

Abstract: An improved hinge assembly is disclosed for interconnecting a pair of handcuffs. In the preferred embodiment, the hinge assembly comprises two parallel single-link hinges that are pivotally attached to the cuffs by trunnion pins. Each link has unique oversized slots, through which the pins extend. This permits the cuffs, when side-by-side, to collapse against one another; and it enables the cuffs to move away from each other for compact wearing over a user's belt. In addition, the trunnion pins are captured within the cuff frames. This avoids tampering found with exposed pivot pins in prior multi-link hinges.

Abstract: A hinge for transferring power between a wall jamb and a door. The hinge includes a pair of hinge leaves having interleaved knuckles axially aligned to share a common bore. The hinge pivots about upper and a lower pins disposed in the common bore. A coaxial cable enters a recess in a rear surface of one hinge leaf, passes through a longitudinal passageway in the hinge leaf, across the common bore, through a longitudinal passageway in the other hinge leaf, and exits a recess in the rear surface of the other hinge leaf. The passageways are aligned and have tapered openings to enable the cable to be routed after the hinge is mechanically assembled.

Abstract: A battery pack to be externally attached to a system body of a portable computer contains a plurality of batteries in two rows. A groove is formed on that portion of the top of the battery pack which correspond to the region between the rows of batteries. A hinge unit for swingably supporting a display unit is provided on the rear end of the system body of the computer in a manner such that it is partially housed in the groove of the battery pack. With this arrangement, the computer is reduced in thickness. The battery pack, which is connected to the rear end of the system body, is rotatable relatively to the system body. During use of the computer, therefore, a keyboard can be slightly declined toward a user by rotating the battery pack to raise the rear end of the system body.

Abstract: A hinge-lock security system for preventing relative motion between a door and a door frame.

Abstract: A laptop style computing device (10) includes a base portion (11), a display portion (12) containing a display screen (16) and a touch input panel (18) and a mechanism (45, 55) for selectively positioning the display portion in selective angular engagement with the base portion in a plurality of angular upright positions for use in the laptop mode, as well as the display up position for slate style use and the display down position for closing the device.

Abstract: A case houses a portable telephone apparatus having a display portion, an operating portion, a speaker portion and a microphone portion provided with respect to two main portions and a hinge portion which connects the main portions so as to be opened and closed. The case is formed of plastic molding. The hinge portion is formed of a soft resin having a resiliency, and the main portion is formed of a hard resin and integral with the hinge portion. A wiring member for provide an electric connection between the main portions extend through the hinge portion.

Abstract: A portable computer includes an upper housing for receiving a monitor, and a lower housing pivoted to the upper housing by means of a hinge assembly for receiving a computer processing unit. A connector unit includes an electrical connector having input terminals adapted to connect electrically with the computer processing unit and output terminals provided with conducting wires adapted to connect electrically with the monitor. The hinge assembly includes a first hinge unit which has a hollow pivot shaft and a first coupling member that extends radially from the hollow pivot shaft for connection with the upper housing, and a second hinge unit which has a sleeve portion that is sleeved rotatably on the hollow pivot shaft and a second coupling member that extends radially from the sleeve portion for connection with the lower housing. The hollow pivot shaft and the sleeve portion cooperatively define a space for the passage of the conducting wires from the electrical connector to the upper housing.

Abstract: A main body case for storing a keyboard and an upper case for storing an integrated display/input device are coupled by first and second hinge units, disposed through a groove in the main body case, to be arbitrarily pivotal from a state wherein the keyboard faces the integrated display/input device to a state wherein the back surfaces of the keyboard and the integrated display/input device face each other.

Abstract: A hinged safety hasp has a hasp plate, a hasp leaf, a staple plate, and a magnet plate. The staple plate and the magnet plate are hingedly attached to the hasp leaf and are to be attached by screws to a surface in an opposing configuration by. The magnet plate includes a flat magnet on its surface. When the hasp is open, the hasp leaf is folded back to contact the magnet, thereby maintaining the hasp plate in a safe position to prevent possible injury to a person contacting an extending hasp leaf.

Abstract: A case for housing an electronic apparatus has two main portions and a hinge portion which connects the main portions so as to be opened and closed. The case is formed of plastic molding. The hinge portion is formed of a soft resin having a resiliency, and the main portion is formed of a hard resin and integral with the hinge portion. A wiring member for provide an electric connection between the main portions extend through the hinge portion. The wiring member passes at a center of rotation on which the hinge portion is turned.

Abstract: An improved jewelry box which incorporates a light source to direct light rays at the jewelry contained therein when the jewelry box is opened. The box consists, generally, of a conventionally-shaped jewelry box with a top section and bottom section. The top and bottom sections are hingedly joined together. A miniature, high-intensity lamp bulb is mounted at the inner surface of the top section. A power source is contained under the jewelry support pad located in the bottom section. An electric switch is incorporated into the hinge about which the top section pivots relative to the bottom section. The switch automatically closes the electrical circuit between the power source and the light source when the box is opened.

Abstract: An electronic apparatus comprises a main body unit, a keyboard unit, a hinge portion for mechanically connecting the main body unit with the keyboard unit, and a flexible cable electrically connecting the main body unit with the keyboard unit. The hinge portion includes a first hinge portion connected to the main body unit, a second hinge portion connected to the keyboard unit and a holding member provided between the main body unit and the keyboard unit for rotatably holding the first hinge portion and the second hinge portion. The keyboard unit is rotatable relative to the main body unit about both the first and the second hinge portions so that an angle of rotation of the keyboard unit relative to the main body unit may be increased.

Abstract: In accordance with illustrative embodiments of the present invention, a door lock for a rear door of a van includes a T-shaped member having a leg that is received in the opening between the door hinges, and arms that extend outward from the leg over a portion of the door and the body, respectively. The leg is padlocked against removal from the opening.

Abstract: The body structure of a pocket computer includes a fastener mainly an elastic fastening element of a multi-layered construction accommodated in an insertion space located at a front edge of the main body housing. A simplified telephone input jack is constructed in the side wall of the pocket computer main body. The association of the main body and the cover body of the pocket computer is accomplished by a pivotal shaft, which is characterized in that it is provided with a delay swivel device permitting the communication cables linking the main body with the cover body to be less vulnerable to bending caused by the actions of opening and closing the cover body and that it includes indicator lights serving to show the operating status of electronic functions of the computer. The keyboard includes entry keys which are securely coupled with the housing plate of the keyboard by slide keys and slide key mounts.

Abstract: An electrically conductive hinge provides for the transmission of electrical power and signals between a pivotally connected display unit and system unit of a portable computer and eliminates cable connections between the display unit and the system unit. Either the system unit, the display unit, or both units have a set of wipers which contact the conductive lines in the electrical track. The conductive lines are long enough to allow the display unit to be pivoted to and from its open and shut positions while the wipers remain in contact therewith. In one arrangement, the electrical track is manufactured on the hinge pin. In another arrangement, the electrical track is manufactured on a disk positioned at or near one end of the hinge pin.

Abstract: This invention pertains to a retractable roller-hinge assembly for use with retractable overhead doors. More particularly, this invention relates to a novel roller-hinge assembly which when installed on conventional retractable overhead doors, such as garage doors warehouse doors or truck doors, enables the door panels to pull away more quickly from the door frame as the overhead door is raised, or lowered. A hinge assembly for connecting upper and lower panels of a retractable overhead door comprising: (a) upper devices for securing to the upper panel; (b) lower devices adapted for securing to the lower panel, the lower devices being hingedly connected by a pivotal axis to the upper devices; (c) roller and roller axle devices rotatably connected to the upper devices, said roller and axle devices being adapted to move towards the lower devices as the upper devices are pivoted about the pivotal axis.

Abstract: A hinge arm for a vehicle includes a tubular member having a first portion for attaching a panel thereto, a second portion for pivotally mounting to the vehicle, and a third portion for rigidly interconnecting the first and second portions so that the panel can be stably moved in a defined arc between open and closed positions. The first portion is shaped to provide panel attachment and includes a flattened side, two lateral sides extending therefrom, and an opposite side that is partially deformed against the lateral sides to support the flat side. The second portion includes a flattened wall with a transverse hole establishing an axis of rotation, and an extruded support surface extruded from the wall around the hole to improve durability. The third portion rigidly interconnects the first and second portions, and is shaped to avoid interferences on the vehicle, receive wires for routing therein, and provide drainage for moisture collected therein.

Abstract: A hinge for use with a fire door has a blade in which there are formed a number of screw holes and a larger opening. The larger opening is filled with an intumescent material.

Abstract: For a tub which provides access through a side door, an inflatable seal is employed with the fluid connection to the seal being provided through the door hinge structure. In one embodiment, sensors are provided in conjunction with the water level in the tub so as to activate the source of pressurized fluid to the seal as well as to deflate the seal at a desired time. In another embodiment, a latching mechanism is utilized so as to provide a secure but easy delatching of the door.

Abstract: A tweezer-type heating device for installation and removal device of electronic components with respect to a substrate, such as for SMC installation and through hole installation or removal. More specifically, a handheld tweezer-type heating device is provided in which a wide variety of different sized (and shaped) tips can be used with a high degree of accuracy in terms of thermo/mechanical contact. Tolerances in the parts of the handpiece, the assembly, the heaters and the tips that may bring the bottom edges of the tips out of their alignment plane are very easily corrected with an adjustable hinge which, by loosening of a screw and sliding the parts with respect to each other, allows proper alignment to be achieved. Still further, a thumb screw is provided at the back of the handpiece to allow the gap between the tips to be slightly opened or closed. This is useful in accommodating tolerances in the components.

Abstract: A hinge has an electrical connection contained therein. A first component (1) of two half-shells (11, 12) includes two hollow cylindrical projections (101, 121) having facing end faces provided with respective cylindrical cavities (102, 122) each having one-half contained in a respective one of the half-shells. A second component (2) includes a hollow cylindrical protuberance (201) with two reduced diameter cylindrical ends (202, 203). The projections and the protuberance are designed to axially interfit so as to constitute the hinge connection effected by engagement of the reduced diameter cylindrical ends (202, 203) within respective cylindrical cavities (102, 122). The two components include radial openings for passing portions of the electrical connection between the first and second components.

Abstract: A tailgate guard apparatus is arranged for securement to the confronting hinge plate walls defining a gate opening between the spaced side walls of a conventional pickup truck bed to effect covering of the various tailgate linkage typically deposed on removal of a conventional tailgate for securement of a gate opening flexible web within the gate opening defined between the spaced hinge plates.

Abstract: A lift mechanism (15) for the cover (13) of a portable spa or hot tub (11) comprising a pair of compressible struts (21) and upper and lower hinge mechanisms (24 and 23) is disclosed. The preferred lower hinge mechanism (23) includes a torque tube (25) rotatably mounted through bushings (31) housed in plates (27). The plates (27) are located at a pair of adjacent lower corners of the spa or hot tub (11) and held down by the weight of the spa or hot tub (11). The struts (21) are attached to the ends of the torque tube (25). The other ends of the struts are attached to opposite sides of the spa cover by the upper hinge mechanisms (24), which preferably include brackets (33) that are fixed to the cover and pivot nuts (71) that rotatably attach the brackets (33) to the struts (21). When the cover is in its closed position, the struts (21) incline upwardly toward the center of the spa or hot tub (11). When the cover (13) is in its open position, the struts (21) lie substantially vertical.

Abstract: An improved hinge assembly for a personal computer system. The hinge is comprised of a tubular portion which is rigidly connected to the cover unit of the computer. A part of the tubular hinge is left open to form a passageway into the cover unit. The tubular portion rotates relative to the main body section of the computer. The tubular portion has a longitudinal section removed from near its mid-point, forming a gap. This gap is closed by a curved cover element. The cover element is held stationary with respect to the main body section of the computer. Thus, when the cover unit is opened, the tubular portion rotates relative to the cover element. A cable connecting the electrical components in the cover unit to the main body section passes through an opening in the curved cover element, is bent, travels through the tubular section, parallel to its central axis, is bent again and passes into the cover unit.

Abstract: A locking hinge mechanism for concrete forms includes parallel hinge strips connected together by hinges positioned at intervals along the length of the strips. Each hinge includes provision for a wedge lock which, when fully inserted, positions the hinge strips at a secure 90.degree. angle. The hinge strips are spaced apart from the juncture of the strips, when arranged at the 90.degree. angle, so that concrete flashings do not clog the hinge. The hinge strips are in turn affixed to the side rails of the joining concrete forms to form a 90.degree. angle, such as for a column form arrangement.

Abstract: A manipulator having an end effector (1) displaceable by means of a four-rod mechanism, a comparatively light and stiff construction being obtained in that each of the rods (3,5,9,11) has a tubular support (73,79,159,181), which is secured by a bridge (147,149,169,191) to the bearing plate (87,93,119,193). The manipulator is particularly suitable for use in automatic mounting equipment.

Abstract: A control housing for storing control boxes below ground level. The housing includes an arm for raising the controls out of the housing for access. A rotatable lift assembly is connectable to a position sensitive control box and maintains the position sensitive control in its original position as the arm is raised.

Abstract: A leaf support for selectively supporting and placing drop leaves of tables and wall mounts in an in use position or a storage position. The leaf support includes a pair of channel-shaped arms pivotally connected at one end about an arms pivot axis. The other ends of the arms are adapted for pivotal attachment to a drop leaf or frame to which the drop leaf is connected. A helical spring is located within the channel-shaped arms and connected to the two arms at its ends thereof. A ring and cover member including a U-shaped member having a base portion and two legs attached thereto and a ring connected to the base portion is provided. The two arms near their pivotal connection are received within and between the two legs and the legs are pivotally connected to the arms so as to pivot about the arms pivot axis.

Abstract: A connector for an electronic apparatus with two cabinets which are foldable with respect to each other is shaped like a plate and is rotatably connected to these two cabinets around shafts which are inserted into holes formed on mutually opposite edge sections of the connector. A throughhole is formed perpendicularly to the shafts such that a connecting sheet for electrically connecting the two cabinets can be passed therethrough.

Abstract: An improved security hinge is provided in which security control wires pass through only one or two knuckles of a hinge whereby improved structural integrity of the hinge is achieved. Slots are cut through the body of the hinge which extend only part way through the thickness of the body of the hinge, and which are located between fastener openings whereby the integrity of the body of the hinge is not impaired. Furthermore, the security control wires extend through only one or two knuckles of the hinge, leaving one or more knuckles undisturbed, whereby the structural integrity of the knuckle portion of the hinge is not impaired. In an alternative embodiment, a hollow sleeve is formed from hardened steel through which the security control wires pass, whereby even greater structural integrity is achieved.

Abstract: A hinge assembly for barrier gates, sluice gates and the like attempted to be raised from beneath the sea, has a fixed portion mounted in a base which can be provided with a tunnel affording access to it and enabling a tierod to pull a replaceable body against this fixed portion. The body carries the movable part of the hinge and is provided with a rotating joint enabling compressed air to be delivered to the barrier.

Abstract: A screw press, and more particularly a pressurized screw press with a driving end, is pivotally mounted at its driving end and rests in a cradle at the other end. A pivotal bearing provided at the driving end of the screw press has a clearance for vertical movement in a fixed axis of rotation. By the aid of this mounting breakage of the screw press casing is avoided when operating conditions comprise varying pressures and temperatures.

Abstract: A hingeable plate assembly includes first and second substantially flat glass plates and first and second displaceable hinges for hingeably connecting the plates so that the second plate is outwardly displaceable with respect to the first plate in substantially parallel aligned relation thereto. The hinges each include first and second hinge pieces which are attached to the first and second plates, respectively, and pivot elements which are captured between the respective first and second hinge pieces thereof. The pivot elements are preferably formed as spherical balls which are received in elongated slots in the respective first hinge pieces thereof and sockets in the respective second hinge pieces thereof. The ball elements can rotate in the respective slots and/or sockets thereof to enable the second plate to be hinged relative to the first plate, and they can travel in the respective slots thereof to enable the second plate to be displaced outwardly from the first plate.

Abstract: First and second flaps (10, 12) are joined at a hinge joint formed by a hollow hinge pin (22) passing through alternating lug extensions (18, 20) of the first and second flaps (10, 12). A plurality of flow openings (24) in the hollow hinge pin (22) are provided for establishing fluid communication between the interior of the first flap (10) and the interior of the second flap (12).

Abstract: A fastening tool for wheel covers comprising a fixing blade, a clipping blade, a rod, a nut and a supporting sheet. These elements are configured so as to clamp the portion immediately after the hand hole of a wheel body. A plurality of fastening tools are, in turn, fixed externally onto a wheel cap. After proper adjustment of these structures, a passage will be provided for a bolt to screw therethrough.

Abstract: Hinge mounted doorstops which include channel members having a normally horizontal perforated web and normally vertical opposed flanges on opposite sides of the web mountable on top of door hinge hubs, engaged by the top hinge pin, edges of the flanges engaging the hinge leaves to limit door opening past a predetermined arcuate amount. The hinge mounted doorstops permitting opening of doors in the general arcuate range of 90.degree. to 180.degree..

Abstract: A modular article support unit consisting of an elongated tubular member adapted to be removably attached to the hinge pins of two hinges of a door by means of adjustable brackets, said elongated tubular member having a plurality of holes along the length thereof for removably attaching several different types of support devices, such as coat hooks, towel racks, bulletin boards and mirrors.

Abstract: A side door hinge mechanism for a motor vehicle includes a pair of top rotary center shafts supported on an end of the door at a top portion thereof, a pair of top rotary center shafts supported on the vehicle body, a pair of bottom rotary center shafts supported on the door, and a pair of bottom rotary center shafts supported on the vehicle body. The bottom rotary center shafts are aligned with the top rotary center shafts. A top control arm in rotatably connected at opposite ends to one of the top rotary center shafts on the vehicle body and one of the top rotary center shafts on the door. A bottom control arm is rotatably connected at opposite ends to the bottom rotary center shafts which are aligned with the top rotary center shafts which are rotatably connected to the top control arm. A main arm is formed integrally in the vertical direction, and i rotatably connected at its end portion to the remaining top and bottom rotary center shafts.

Abstract: A quadric rotary link device for a side door hinge mechanism in a motor vehicle is disclosed. The device has first and second arms connected by rotary center shafts to a vehicle body and a side door. The hinge mechanism has a door side base and a body side base formed long in the vertical direction. The door side base is secured to the rocking proximal end of the side door. The body side base is secured to a vertical surface of the vehicle body. There are four top rotary center shafts and four bottom rotary center shafts supported at two pairs of positions in the top and bottom of the door side base and the body side base, respectively.

Abstract: The invention relates to a hinge for pivotally mounting flood lamps. The hinge includes a first and second knuckle. The first knuckle has an internally threaded socket. The second knuckle includes a first part and a second part, and the parts are interlocked for simultaneous rotation. The first part further has a rotation resisting surface facing the first knuckle. The hinge further includes a pair of shroud members, which each have counterbored aperatures therethrough and are arrange on each side of the second knuckle. There is a pair of threaded hinge pins, one each passing through a shourd member and a part of the second knuckle and threadably received in the first knuckles threaded socket. Loosening the threaded hinge pins permits relative rotation of the knuckles while tightening of the threaded hinge pins fixer the angular orientation of the hinge. The counterbores of the shrouds make difficult uninvited (i.e. vandalism) tampering of the hinge.

Abstract: The hinge enabling articulation of sectional panels (30) on a frame (10) consisting of a lip (11) forming swivel pin, integral with the frame, and at least one retaining member (20), such retaining member being fitted onto a projecting part (12) of the frame and held in place by a flexible blade (23) having a catch thereon which snaps into a groove (13) in the projecting part, each sectional panel (30) terminating at the hinge in a substantially semi-circular trough (31) guided between the lip (11) and a rounded portion (27) of the retaining member (20) located opposite said lip, features a hand releasing tab (25) made integral with the flexible blade (23) and projecting outside the retaining member (20).

Abstract: An automobile body is disclosed herein having a roof hinged door operable between a raised open position and a lowered closed position wherein the hinge is a unitary construction having a well with arcuate side portions mating with a seal secured in the roof door jamb so as to be conformed with the outline of the automobile body configuration and further includes foldable, telescoping articulated support struts as well as lock mechanisms for releasably securing the door in its closed position.

Abstract: An apparatus for housing electrical wiring extending between a vehicle door and a vehicle body. A first link is pivotally connected to the vehicle door and the vehicle body for pivoting the door away from the vehicle body. A second link is pivotally connected to the vehicle door and the vehicle body rearward of the first link along the length of the vehicle. The second link cooperates with the first link to pivot the vehicle door away from the vehicle body. The second link includes a pivotal support frame, a conduit section, and a clamping member for removably clamping the pivotal support frame and the conduit section together to enable the conduit section to be detached from the pivotal support frame. When clamped, the pivotal support frame and the conduit section define a conduit therebetween. Electrical wiring extends within the conduit for providing electrical wiring between the vehicle door and the vehicle body.

Abstract: Apparatus is provided for attachment to a microscope which alternately positions a filter in alignment with the objective of the microscope and stowed along the side of the body of the microscope. A stationary post is screwed to an accessory fitting associated with the body of the microscope, and a filter holder, which includes a filter-retaining ring and an extending stem, is mounted for rotation from the end of the end of the post. To register the holder stabilized in its aligned and stowed positions, the stem rotates against a face of the post in which a groove is formed, and the stem is biased against the face by a spring so that it catches in the groove in either of the registered positions.