Abstract: A frame support for a cardiac tissue valve is provided of the type including a hollow, substantially cylindrical body composed of a semi-flexible structure of a material such as polypropylene, covered by a medical grade fabric. The frame support defines two fully opposite ends or entrances, to the edge of which are sewed the aortic ring and the remaining portions of the resected sinuses of Valsalva including the commissural areas of the aortic wall of an animal valve, such as a porcine valve. The frame further includes an outer-widening or suture ring which defines a continuous ridge of the same fabric material. The frame has a wavy or scalloped proximal end and a distal end; the proximal end having a number of cusps corresponding to the number of commissures of the valve supported thereby.

Abstract: A portable and rechargeable self-contained bidet for use in conjunction with toilet fixtures which controllably dispenses a contained water solution under pressure. A cylindrically shaped reservoir provided with an integral mounting bracket which passes between the lowered seat and the toilet bowl supports the reservoir adjacent to the exterior rim of the toilet bowl. The free end of the mounting bracket further extends into, thence inwardly and downwardly into the interior of the toilet bowl. A directable spray nozzle is located adjacent to the terminus of the free end of the mounting bracket. The reservoir contains the douche solution, and is provided with a spring biased piston by which pressure is maintained on the stored solution. An inlet valve permits charging of the reservoir with water under pressure from an available source through a hose connection. A discharge passage within the mounting bracket connects the reservoir interior to the inlet of the directable spray nozzle.

Abstract: An article of furniture is formed of a plurality of interconnected modules. Each module comprises a cabinet module in that it is formed by exterior wall members which define an interior storage space therewithin. The module is constructed having one or more slidable drawers or a lid for providing access to the interior storage space. The modules are provided with connecting members, such as male and female fasteners on appropriate side wall members thereof for mutually interconnecting a plurality of such cabinet modules so as to form a desired article of furniture thereby inherently imbuing the article of furniture so formed with cabinet or storage capabilities. The modules can be interconnected in a multitude of different configurations to obtain a variety of different articles of furniture.

Abstract: A hospital stretcher, including a chassis frame mounted on wheels, and a stretcher frame carried upon the wheeled chassis frame, transverse extending rails across a top of the chassis frames so that a ball bearing suspension mounted on an underside of the stretcher frame, allows the stretcher frame to be sidewardly moved a part way upon a bed so as to more easily permit transfer of a patient therebetween.

Abstract: A support cushion for medical use, especially during surgery, to support the patient's head and neck in convenient positions without patient damage includes two portions made of polyurethane foam separably joined by hook and loop fasteners or the like. The portion normally on top when the two are used together has a hemispherical depression in the top, a groove extending outwardly from the depression, dihedral plane surfaces extending out from the groove and a rectangular bottom surface. The bottom portion has a rectangular top surface, a V-shaped groove in the bottom and planar surfaces on either side of the V-groove lying in a plane which makes an acute angle of about 7.degree. with the plane containing the top.

Abstract: A self-tapping screw of the type including a head, a depending cylindrical portion, a tapered point and a thread running continuously from the cylindrical portion onto the tapered point and a method of making same are disclosed. A screw blank is formed with a constant diameter cylindrical shank, the lower end of which includes a depression or concavity. Cooperating, relatively moving dies including opposed faces defining a tapered slot within which the blank is received cut a continuous thread into the blank. The concavity in the blank permits the metal to flow more readily resulting in crisp threads and a significant increase in the life of the thread rolling dies.

Abstract: A concrete bridge girder support structure for use in a cantilever erection method is disclosed. The support structure comprises an upper shoe for use as a fixture to the girder through a sole plate fixed to the girder at a predetermined position, a lower shoe fixed on a pier and abutment, a movable part(s) disposed between the upper and lower shoes, and a movable plate placed for bridge-axial movement relative to the upper shoe. A concrete bridge girder erection method using such a support structure is also disclosed. The girder having the sole plate fixed thereto at the predetermined position is carried on the movable plate and continuously advanced along the upper shoe up to a predetermined erection position with bridge-axial movement of the movable plate. At the erection position, the sole plate is integrally fixed to the upper shoe of the support structure.

Abstract: The cleaning apparatus includes: (A) a cleaning head having a plurality of angled side by side chisel-like blades, the end sections of which are affixed to a pivotable member having one end portion secured to a frame member, said pivotable member allowing said blades to traverse an arcuate path, said cleaning head having a centrally located pivotable member for affixing cleaning head to a carriage and allowing for uniform loading of blades against surface to be cleaned; (B) a carriage for transporting the cleaning head in a reciprocal path across the periphery of an open door surface to be cleaned, pivotably connected to the cleaning head by the centrally located pivotable member and means for driving said carriage; and (C) a supporting ram affixed to the carriage on the side opposite from the cleaning head, and means for moving the carriage and cleaning head toward and away from the surface to be cleaned.

Abstract: A gripping construction of a toothbrush handle consisting of opposed substantially rectangular-block shaped flanges of approximate dimensions as of the dimensions of the handle in cross section and positioned about one third the distance from the brush head end (or about two and one half inches) and extending vertically and transversely at one hundred and eighty degrees to the top and bottom surfaces of the handle to form a cross-arm therewith whereby principally the side edges of the cross-arm and the front and back surfaces of the flanges allow the forefinger and thumb to press opposingly to effectively grip the brush for better manipulation of it.

Abstract: A hinge-pin doorstop made of spring-steel bent to provide a loop through which the hinge pin on the door hinge fits for mounting purposes, and having a pair of resilient arms which extend radially from the loop in spaced relation to each other, so that when they are pinched between the door and the molding on the door frame, they absorb the shock of the door, thereby preventing damage to the door or frame.

Abstract: A self-closing door hinge arrangement including two hinges with the structure which enables the hinges to be bolted together so as to rotate about a common axis, thereby allowing the door to swing in a balanced and smooth manner.

Abstract: Apparatus and method for delinting cottonseed wherein a moving body of cottonseed is subjected to a flame treatment for burning off excess linters, then subjected to an acid treatment wherein foamed sulfuric acid of adequate water content is deposited on the seed and the seed agitated, and then the seed is dried and the acid degraded linters removed. In an important embodiment the seed is acid treated, dried and buffed to remove degraded linters serially in at least two successive stages.

Abstract: A bale opener includes guide elements for bilaterally bounding a space in which a bale to be opened is accommodated, bale opening elements for opening the bale at its underside and a bale supporting device arranged above the bale for engaging an upper face of the bale and for exerting thereon a downwardly oriented pressing force.

Abstract: A condensing trumpet for a draw frame has internal passages formed in such a way as to receive two separate sliver types and bring them together in a sheath-core arrangement where one sliver completely surrounds the other.

Abstract: A one-piece, spring steel fastener (10) for releasably retaining the edge of a plastic panel (P) with a predetermined resistance to release is provided. The fastener comprises a base section (12) and a pair of leg sections (14, 16) extending therefrom. The leg sections each comprise a first portion (22, 24) extending upwardly and inwardly from the base section and a second portion (34, 36) extending downwardly and inwardly from the first portion to a free edge (38, 40). A tab (46, 48) is sheared from the second leg portions and extends generally inwardly therefrom. The free edges are separated by a distance (42) generally equal to the thickness (44) of the panel while the innermost edges of the tabs are separated by a distance (50) less than the thickness of the panel.

Abstract: A self-stringing jet device which is compact and easy to string up includes a body, a yarn inlet section, and a movable venturi and a rotatable cylindrical baffle located at the outlet end of the jet. The yarn inlet section comprises a cone-shaped yarn entrance having an axis that is at an angle with the axis of the yarn passage through the jet. The venturi may be moved from a stringup position to an operating position by one or more camming surfaces on the rotatable cylindrical baffle.

Abstract: A running tow of filamentary filter material is banded by a plurality of streams of compressed air which issue from the orifices of plenum chambers forming a row which extends transversely of the direction of transport of the tow. The streams which issue from the plenum chambers band discrete strip-shaped portions of the tow. The density of such strip-shaped portions is monitored at or downstream of the banding station, and the pressure of air in one or more chambers is increased or reduced when the monitored density of the respective strip-shaped portion or portions deviates from a desired density. The monitoring devices can utilize optoelectronic or electropneumatic transducers.

Abstract: The apparatus has two pairs of long driven nip rolls on which bobbins with residual roving are advanced axially in a row with the nip rolls engaging the ends of residual roving and unwinding the roving into a delivery plenum therebelow through which the roving is drawn by suction to the surface of a rotating perforated delivery drum through which the suction is drawn to retain the roving thereon as the drum rotates the roving to a discharge plenum in which a shredding drum shreds the roving for discharge in pieces through a discharge plenum. A baffle plate is mounted closely adjacent the delivery drum to confine suction through the drum and to allow roving to be transported on the delivery drum between the drum and the plate, and extends adjacent the shredding drum to confine the roving thereto. In one embodiment, the baffle plate is perforated to allow suction to be drawn through the plate into the drum and to direct roving to the shredding drum.

Abstract: Apparatus for efficiently producing a wire fin tube for heat transfer which comprises fin-forming means for shaping a plurality of wires to a wavy shape, said fin-forming means including a pair of gears; means for guiding the wavy wires in an upstanding state including guide plates spaced apart a selected distance; means for feeding a revolving tube in a crossing direction, to the wavy wires so that the wires can be wound on the tube; means for controlling the operative speed relation of the fin forming means and the tube feeding means so that the wavy wires may be helically wound on the tube under a moderate tension so as to maintain the upstanding state and the same pitch as the distance of the guiding means; and means for welding the wire fins to the tube.

Abstract: There is disclosed a technique for tightening threaded fasteners in which values of offset torque, initial tension rate relative to angle, final tension rate relative to angle and other joint related factors are empirically determined by instrumenting a plurality of fasteners of the type ultimately to be tightened. In one embodiment, torque and angle are monitored during tightening. Calculations are conducted, while tightening, to determine the tension prevailing in the bolt at a particular angle of advance. By using the calculated tension value and the particular angle of advance, an instantaneous position of threading advance on the tension-angle curve of the fastener is established. From this instantaneous position, it is determined how much greater angle of advance or how much torque is required to tighten the fasteners to a final desired tension value. The same technique may also be used merely to monitor tightening which is terminated by a different tightening strategy.

Abstract: There is disclosed a technique for tightening threaded fasteners in which values of offset torque, initial tension rate relative to angle, final tension rate relative to angle and other joint related factors are empiricallly determined by instrumenting a plurality of fasteners of the type ultimately to be tightened. In one embodiment, torque and angle are monitored during tightening. Calculations are conducted, while tightening, to determine the tension prevailing in the bolt at a particular angle of advance. By using the calculated tension value and the particular angle of advance, an instantaneous position of threading advance on the tension-angle curve of the fastener is established. From this instantaneous position, it is determined how much greater angle of advance or how much torque is required to tighten the fasteners to a final desired tension value. The same technique may also be used merely to monitor tightening which is terminated by a different tightening strategy.

Abstract: A universal tool for installing and removing hubs on a shaft having a threaded end portion. The assembled tool comprises a support member, a reversible member, a bearing and a plug. The reversible member includes an integral drive and bearing support portion intermediate its ends with an externally threaded removal portion on one end of the reversible member and an installing guide portion on the other end thereof.

Abstract: There is disclosed a technique for tightening threaded fasteners in which values of offset torque, initial tension rate relative to angle, final tension rate relative to angle and other joint related factors are empirically determined by instrumenting a plurality of fasteners of the type ultimately to be tightened. In one embodiment, torque and angle are monitored during tightening. Calculations are conducted, while tightening, to determine the tension prevailing in the bolt at a particular angle of advance. By using the calculated tension value and the particular angle of advance, an instantaneous position of threading advance on the tension-angle curve of the fastener is established. From this instantaneous position, it is determined how much greater angle of advance of how much torque is required to tighten the fasteners to a final desired tension value. The same technique may also be used merely to monitor tightening which is terminated by a different tightening strategy.

Abstract: A method of assembling a metal-clad rigid airship hull and apparatus for use in the assembly is disclosed. The apparatus is a rotating cradle consisting of an endless belt extending around and suspended between motor-driven cylinders. The cradle is rotated to provide angular positioning of hull surfaces of the airship at specific work locations. The bow and stern of the airship are assembled in a vertical position and, upon completion, are hoisted by a crane or sling to the horizontal position and attached to the main section of the airship hull structure utilizing the rotating cradle.

Abstract: A rotary rake structure for use in a settling tank comprises a torque transmitting member and a pair of rake arms. The torque transmitting member is mounted in the tank for rotation about a vertical axis. Each rake arm comprises one or more upper chords and one or more lower chords, the two rake arms being symmetrically disposed on opposite sides of the vertical axis of rotation along a transverse axis generally perpendicular to the axis of rotation. The upper and lower chords of each rake arm are fixedly positioned with respect to each other by truss members. The upper chords of both rake arms are attached to the torque transmitting member so as to permit pivotal motion of each rake arm in a plane containing the transverse axis and the vertical axis of rotation. Scraping devices depend from the lower chords for raking sediment at the bottom of the tank when the rake arms are rotated by the torque transmitting member. The end of each lower chord adjacent the axis of rotation terminates in a flange.

Abstract: A tool for the selective joining of the individual conductors of a multiconductor flat cable. The tool may be set according to indicia on a selection device to punch any pattern, which can be correctly employed, on the cables guided and oriented on the tool base. After punching, connectors are manually inserted through the punched apertures and the tool is reapplied to simultaneously crimp all of the connectors to complete the joints.

Abstract: The radiation resistance of an MOS transistor is improved by making the transistor in a manner such that, after the gate insulation layer is formed, all further steps are carried out at a relatively low temperature, i.e., less than about 900.degree. C. The source and drain regions are preferably formed by ion implantation with very little or no post implant thermal activation, and the metallization is applied by low temperature techniques.

Abstract: This invention relates to a machine which receives ballpoint pen barrel assemblies in bulk form, feeds these barrel assemblies in single-file order and orients them over a preassembled refill, spring and cap assembly which is carried along a predetermined path.

Abstract: A shaving apparatus has a circular shear plate provided with hair-entry apertures and a cutting unit associated with and rotatable relative to the shear plate. The cutting unit comprises a cutting member having a circular central body provided with circumferentially arranged cutters and lead cutters respectively associated with and movable relative to the cutters. Each lead cutter is secured to the central body of the cutting member by a resilient connecting arm, the inner end portion of which extends substantially radially with respect to the cutting unit axis and undergoes torsion-loading by reason of the movement of the lead cutter away from the shear plate, the lead cutter being connected eccentrically to such inner end portion. The torsion-loading is elastically opposed in each instance.

Abstract: A convenience improvement in rotary mowers, trimmers and edgers of vegetation that have a rotating body from which one or more flexible cord-like filamentous cutting blades or flails extend radially so that additional flail length can be fed from the device by merely bumping the rotating body on the ground. The improvement includes a plurality of spline lugs on one portion which extend into a serpentinous cam slot on another. Bumping of the device on the ground causes the lugs to move from stable positions to other stable positions allowing relative movement between the outer case of the mower and a spool of flail therein so that predetermined length of flail is fed out through the case.

Abstract: In a segmented bar having a longitudinal axis, a first bar section slidably interengageable with a second bar section under longitudinal axially displacement to move into and out of end to end abutting interlocking mating relation, each of said bar sections presenting corresponding longitudinally extending mating surface formations on opposite sides and corresponding longitudinally extending mating edge formations along opposite edges, each bar section terminating in an abutting end edge formation to be presented to the abutting end edge formation of the other of said bar sections when disposed in interlocking mating relation, the opposed surface formations of one of said sections each including a locating recess therein and offset in relation to each other and each bounded by a portion of the extent of its adjacent abutting end edge formation, the opposed surface formations of the other of said sections each including a mating projection for each of said locating recesses and likewise offset in relation to e

Abstract: The four sides of a rectangular piece of screening are secured into an open frame to form a grid. Opposite lengthwise sides of the frame are grooved on the edges to make a track along which a separate piece can slide. This piece consists of a long, rectangular, magnifier lens, of a length equal to the width of the grid screen, bonded at each end into a framework the total length of which extends over the two sides of the grid frame hooking into the two side grooves of the grid frame. Height of the lens framework is dependent upon distance necessary for maximum magnification of lens. The grid frame is placed over a picture or design to be copied and, as the lens is slid along the grid frame vertically, a graph of the design is magnified for reproduction square by square into any material compartmentalized to receive the graphic presentation. The invention is particulary adapted for needlepoint rendering.

Abstract: A marking template for marking the location on a wall covering of both electrical outlets and electrical switches located in the wall to be covered. The template can be supported by either the single support screw for an outlet trim plate or the two support screws for a switch trim plate. The template comprises a base plate having a central aperture, two tabs thereon for receiving the outlet trim plate support screws, and a pivotable bar for receiving the switch trim plate support screw. Four pins extending from the template mark the wall covering. When the template is used on a switch, the bar is pivoted out of the way of the switch toggle.

Abstract: A system for minimizing manual handling of tobacco leaves for bulk cure comprises a container for use in forced air curing of tobacco in bulk, a kiln having a floor arrangement to effect better control of air flow in achieving forced air cure in such containers and apparatus to facilitate handling of containers from the field, placement in and removal from a kiln. The bulk cure container sidewalls have a plurality of projections to define internally of the container a plurality of obstructions which impede the flow of air along container sidewall interior filled with tobacco in bulk form. The kiln has a floor arrangement which provides a plurality of cavities adapted to sealingly engage container bottoms. The apparatus for handling the containers includes a mobile frame supporting a pair of spaced-apart rails. Such rails cooperate with corresponding pairs of rails in kiln so as to be interconnectable therewith.

Abstract: A simplified testing apparatus comprising a test board assembly and an information display sheet. The board includes correct and incorrect answer circuits which are completed by placing a signal manually positionable answer selector unit through a selected aperture in the board. Each aperture registers with an associated answer terminal. Inserting the answer selector, through the selected aperture energizes an answer indicator. The invention display sheet contains a multiple answer format, with apertures being provided in the answer sheet for association with the apertures in the test board. The answer sheet is arranged so as to disguise the fact that there is a prearranged correct/incorrect answer circuit contained in the board. In a preferred form, a portion of the answer sheet consists of a plurality of flaps, the reverse side of which contains information explanatory of the answers.

Abstract: A simulated open circuit on high current electrical lines is generated, such that high currents, including transient currents, do not interact with and adversely effect the low current digital computer electronics which control the simulation. A bi-directional triode thyristor in its non-conducting state is triggered to enter its conducting state allowing current to flow through the thyristor and to trip a circuit breaker connected to the output of the thyristor. The tripping allows the thyristor to reset itself to its non-conducting state and to be ready for any new triggering signal.

Abstract: The disclosed educational devices comprise self-adhering members to which a pressure sensitive adhesive material is applied, on the outside of at least a portion of each member. In one embodiment, each educational device comprises an elongated stick, rod or tube which is sufficiently rigid to be self-supporting. A knob or body of the adhesive material is mounted on at least one end of such stick or the like. Preferably, knobs of the adhesive material are mounted on both ends. The sticks may be adhered to one another and also to supporting surfaces, to produce letters, symbols, figures, geometric designs, and many types of artistic representations. The adhesive material comprises microcrystalline wax with mineral oil in the proportion of 2 to 12% mixed with the wax to provide greater tackiness, the wax being of a flexible type with a melting point between 150.degree. and 180.degree. F. and a needle penetration between 20 and 50 when measured at 77.degree. F. in accordance with ASTM Standard No. D1321.

Abstract: This article insulates the toes and feet of a cross-country (Nordic) skier when it is secured in position atop the forward part of the ski boot by strap means and by the clamping effect of the bail of the ski binding on the tongue section of the article. The article consists of two fabric components, an upper and a lower, attached at their front and lateral edges. They are shaped and dimensioned to fit over the forward part of the boot upper and to contain a pad of insulation between them. The tongue section is an extension of the two components beyond the toe end of the boot upper; it contains no insulation. A first strap, attached to the insulator, extends over the insulator and beneath the boot sole to hold the insulator in position against the boot upper. A second strap extends around the heel of the skier's boot and also serves to hold the insulator in position.

Abstract: The invention concerns an article of footwear comprising a footwear upper attached to a footwear base, said footwear base comprising a sole part and a heel part, said heel part having an upper surface on which the weight of a person's foot will press and a lower surface adapted to contact the ground, the area of the lower surface being greater than the area of the upper surface, said lower surface extending outside vertical planes passing through the upper surface at the periphery of the upper surface on both sides of the heel part and behind the heel part, and a peripheral ridge extending upwardly from the surface on which the weight of a person's foot will press, said peripheral ridge flaring outwardly on both sides of the heel part and behind the heel part. The flaring occurs from the top of the ridge to the lower surface of the heel part. The upper inner surface of the heel part is attached to the footwear upper. The article of footwear may be a shoe, especially a running shoe.

Abstract: A unitary, light weight metal I-beam frame member of generally oval plan configuration bears a first transverse spreader rod between lateral sides to support a flat swivel toe plate which extends across the top of the rod. The plate has fixed at its center a flexible strip material toe binding for partial wrapping of its opposite lateral sides about the toe of an inserted boot of the snow shoe wearer. The I-beam frame carries opposed sharp edges at its base for improved traction. Flexible sheet material pads are laced to the interior of the frame forward and aft of the binder to resist snow shoe penetration into the snow field during use. A U-shaped traction device is fixed to the bottom of the I-beam frame member, beneath the toe plate, and is notched on its lower edge to bite into the snow.

Abstract: In a snowplow having a steel blade and an auxiliary blade of elastomeric material which can be moved pivotally from an inoperative to an operative position, power means are provided for raising and lowering the steel blade between first and second working positions. In the second working position the scraping edge of the steel blade is raised from the ground and the auxiliary blade is pivotally moved into cooperative alignment with it, the blade structure as a whole being tilted forwardly to change the angle of attack of the scraping blade.

Abstract: A dragging type cutter head for a suction dredger has a cutting member that rotates about a horizontal axis and has at its periphery a series of cutting teeth disposed side-by-side in the axial direction. At the lowermost point in their rotation, the cutting teeth rotate in the dragging direction. The dragging head has an inlet opening for cut material, whose edges extend to the outer circle of rotation of the cutter teeth with the lower edge of that opening at the same level as the lower part of the cutting member. The cutting teeth are pivotal on horizontal axes spaced from that of the cutting member; and springs urge the cutting teeth about their axes in the cutting direction.

Abstract: A press table comprising a suction and blowing unit is disclosed. The suction and blower unit is adapted for direct connection with the lower side of the press table, thereby achieving optimized changeover speed from suction to blowing and vice versa. The press table comprises one or two auxiliary press table members and control means for automatically bringing the auxiliary press table members into communication with the suction and blower unit when they are used, simultaneously disconnecting the main press table from the unit.

Abstract: A transparent convention badge holder of the type having front and rear panels and seals securing the panels to one another has a transverse seal and fold line forming an elongated compartment and a short pocket. The elongated compartment is adapted to be positioned in a coat pocket, with the short pocket suspended outwardly in exposed position over the coat pocket edge. The panels forming the exposed pocket are sealed together at their peripheral edges, and one of the panels has a horizontal slit formed therein and extending thereacross. A cut out is heat sealed about its periphery and is centered on the fold to permit grasping of a printing card/identity insert. A pair of vertical seals also join the panels, the vertical seals extending from slightly above the slit and serving as card guides for the removable positioning of the printing card/identity insert therein.

Abstract: A holder for supporting a pair of pet tags while preventing rattling therebetween comprising an elongated base member having means at one end for connection to a pet collar and carrying a post on a second end for engaging a hole in pet tags. A pair of spring arms are carried by the base member and have free ends spaced in opposition about the post to urge the tags against the base member to thereby prevent rattling. In a preferred form the base member comprises a flat plate having dimensions comparable to a pet tag and providing a surface for carrying identifying indicia.

Abstract: An all-inclusive package comprising a book having an easily removable binding and cover, and removable leaves; in combination with a plurality of transparent plastic frames into which individual leaves from the book may be placed temporarily or permanently, means for hanging the frames for display, and means for holding the book, the frames and the hanging means together as a unit.

Abstract: A display apparatus is provided comprising a plurality of spaced lights with reflectors operatively associated with the lights which are isolated from one another. A circuit is provided for actuating the lights for selected periods of time to create an appearance of sequencing. Shaped lenses having the form of alphabetic characters or the like are associated with the lights and are illuminated thereby to achieve a desired effect. The reflectors and seperators associated therewith are connected together in a monolithic structure. The reflectors are asymmetrically formed in the case of asymmetrically shaped alphabetic characters in order to direct the light most appropriately through the shaped lenses. Sequencing is provided by the use of a binary counter, the output of which selectively actuates the lights.

Abstract: A display device which can rotate a flap of a display unit in opposite directions in accordance with a predetermined program without necessitating any expensive electronic circuit and switch mechanism. The device comprises a substrate, a flap rotatably supported on the surface of the substrate, a permanent magnet secured to the flap, and a driving magnet located in the rear of the substrate and movable rotative to the substrate. The driving magnet includes an S pole magnetized region and an N pole magnetized region arranged so as to hold the flap at either one of two positions disposed on the substrate.

Abstract: A picture viewer having an enclosure including a housing or frame and a slider movable in the housing, the frame and slider defining a compartment for a pile of pictures, a separator bar or pile transporter in the enclosure, an individual picture transporter accomplishing loosening of an individual picture from the pile and transporting the individual picture away from the pile, the loosening being accomplished by surface retentive means engaging the face of the individual picture at an end of the pile, such retentive means taking any of a number of different forms including forms which adhere, apply suction, are magnetically or electrostatically attractive, or otherwise retentively related to the face of the individual picture, the surface retentive means, in several forms of the invention, accomplishing the transporting function as well as loosening function, and in other forms of the invention the transporting being accomplished by separate transporting devices.

Abstract: A portable sign having a lightweight, detachable framework, sign support and ground engaging means is disclosed. The sign is further provided with reinforcing means which seal, add weight and stiffen the reversible foldable sign face and which cooperates with portions of the framework to maintain the sign face in its intended position.