Abstract: A system for assembling a hard crystal blank onto a base which includes connecting pins, using an apparatus providing self-locating and self-fixturing features, is described. The apparatus comprises a hard crystal blank supporting structure which provides vertical, horizontal and transverse locating features. The vertical, horizontal and transverse locating features are contiguous to the crystal supporting structure and locate the hard crystal blank to the crystal supporting structure. The hard crystal blank once located may be secured to the crystal supporting structure with a suitable adhesive. Connecting features for securing the crystal supporting structure to the base are provided. Once the crystal supporting structure has been secured to the base, the vertical, horizontal and transverse locating features are separated from the crystal supporting structure. The hard crystal blank and crystal supporting structure so assembled are precisely aligned to the base.

Abstract: A twin disc type tool turret mechanism for CNC machines including a double layer of tool mounting discs attached respectively to two of a three-piece toothed ring-type registration and lock coupling. The front disc provides a number of mounting slots for external turning tools and the rear disc provides the same number of mounting seats for facing, OD turning or internal boring tools. A drive mechanism combined with a hydraulic control system incorporated in/on the turret housing facilitates unlocking, rotation, and relocking of the discs with the turret housing. The subject turret can also include provisions for attachment of revolving tools with an active spindle and an additional spindle motor for effecting the required processing operations. In addition, both OD and ID probes and a signal transmitting mechanism may be installed in both discs to accomplish in-process measurement of the workpiece.

Abstract: A slide (20) having conveniently removable and replaceable bearing components (28-38) with the bearing components engaging seats (50) made of resilient, low friction material. The slide is supported on ways (24, 26) by way bearing pads (28-32) and opposed adjustable bearing assemblies (34-38). The seats (50) are formed by rough machining pockets (40, 42) into slide (20), positioning the slide (20) onto the ways (24, 26), positioning tooling blocks (60) at the locations normally occupied by the bearing components (28-36), and filling the spaces between the tooling blocks and pockets with a low friction, epoxy material, thereby forming the seats (50). Any one of the bearing components (28-38) may be removed and replaced without removing the slide (20) from the ways (24, 26). Further, each bearing assembly (34, 38) is mounted on one side of a respective way with a way bearing pad (28-32) being mounted on the opposite side of the way.

Abstract: A method for and an apparatus for assembly of rotating ring rotary compressors is disclosed. A cylinder, shaft, roller and supports are initially assembled together, fixing means being kept in a slackened position. A preliminary centering operation is then carried out for bringing the axis of the shaft into a diametral plane of the cylinder constituting a predetermined reference plane. This operation is carried out by orientation of the shaft into two angular positions spaced from each other by 180.degree.. The shaft is then oriented relative to the cylinder, the region of maximum eccentricity of the core being brought into the said reference plane. The support and the cylinder (this latter with the interposition of the roller) are then pressed onto the shaft by a thrust exerted in the said predetermined plane.

Abstract: A method of manufacturing a variable incidence stator blade assembly comprising forming a blade with a root which forms an extension of the aerodynamic profile of the blade, forming a bush with a recess accommodating the root by ultrasonic, electro-chemical or electro-erosion machining and assembling the blade and bush in a turbo-machine outer casing and in an inner ring of channel section.A variable incidence stator blade assembled in a compressor of a gas turbine is also described, the blade assembly being as manufactured by the method. The channel section inner ring carried an abradable layer which co-operates to form a seal with annular lips carried by the compressor rotor drum.

Abstract: Heat exchanger tubes and heat pipes are simultaneously radially expanded into engagement with heat transfer fins and provided with internal spiral grooving by a generally spherical shaped tool disposed on the end of an elongated mandrel. The tool comprises a spherical segment having helical teeth formed on the exterior thereof and the tool is mounted for free rotation on the end of the mandrel. In forming a finned tube type heat exchanger a series of platelike fins are disposed in alignment with each other with tube receiving openings formed slightly oversize with respect to the outside diameter of the tube prior to expansion. The tube is supported by the fins and is secured at one end by a suitable device such as an expanding jaw collet connected to a hydraulic cylinder for extending the mandrel through the tube.

Abstract: For the purpose of compressing by hammering a steam generator tube (1), a stream of gas at high velocity charged with particles having a particle size of between 50 and 500.10.sup.-6 m, is directed onto the inner surface of the tube (1) in radial directions and onto the whole of the periphery of the tube. The flow of the mass of the particles is higher than 0.008 kg/sec for tubes having an inside diameter of around 0.020 m. The device comprises a flexible sheath (20) movable inside a case (16, 18) fixed in a sealed manner under the tube plate (2) around the tube (1). An injection nozzle (21) is disposed at the end of the sheath (20) receiving the gas charged with particles.

Abstract: A tool is provided for repairing valve elements in pressurized systems having a valve stem and a valve core. A block member has a passage therethrough at which a valve stem engagement structure is affixed. A slide member is dovetailed to slide along the block member. The slide member also has a passage therethrough such that in one sliding position of the slide member relative to the block member the respective passages align to allow a tool to be passed through the slide member, block member, and valve stem engagement structure to service the valve. When the passages are misaligned, the passage through the block member is substantially sealed from gas leakage by abutment with the dovetail-attached slide member.

Abstract: A vehicular exhaust hanger tool for swift, facile removal and installation of vehicular exhaust hangers by which vehicular mufflers are mounted. A hanger hook member with a curved hook is slidably movable along a guide member away from a mounting bracket abutting portion of the guide member to position and flex a hooked hanger.

Abstract: Means and method for mounting utility boxes, panels, or like housings, as between studding in the framework of a building. A self-supporting tool is provided that can be interposed manually between a pair of flanking wooden studs or equivalent vertical structural members at desired height and depth of insertion. The tool, when manually released, engages the studs forcibly enough, as by indenting their sides, to be held in place while a utility box or panel is placed on the tool by the user of the tool, who then secures the box or panel in place by inserting fastening means, such as nails or screws, through its side and into the sides of the studs. The tool gauges the depth of insertion of the box or panel between the studs, by contact with the front surfaces of the studs and the rear surface of the box or panel.

Abstract: A thread gage for use with a threading machine for automatically and quickly gaging a thread after it is formed. A stylus support is mounted on the machine turret for placement of the stylus in position for movement axially of the thread to follow the thread contour. The stylus is connected to a transducer. The machine computer control may be programmed to receive signals from the transducer indicative of radial position of the stylus tip and signals relative to axial position of the turret indicative of axial position of the stylus tip to form a digital model of the thread which may then be compared to a standard thread and/or used to make adaptive threading machine offsets.

Abstract: Process for the hot forming of sheets (5) made of a material that is difficult to work, especially of a dispersion-hardened high-temperature alloy by hot-isostatic pressing in one operation against the contour of a mold (1) serving as negative form in a container (2) that is under vacuum (6) and closed by a cover (3) with welding seam (4). In addition, joining of several sheets (5) to form one body (9) of complicated shape by the diffusion bonding process at the end of the hot-isostatic pressing in one heat in the same single operation.

Abstract: There is disclosed a hand-held tag attacher having a manually engageable handle and a hopper for holding a stack of tags, a feeder for feeding tags one-at-a-time from the stack in the hopper to an attaching position, the hopper being constructed to position the stack at an acute angle relative to the axis of the attacher, the attacher having a hollow needle and a push rod for pushing a bar section of a fastener through a tag at the attaching portion behind the needle and into and through the needle, a mechanism for feeding fasteners one-at-a-time into alignment with the needle, and an actuator disposed at the handle and operable twice to complete a cycle of operating the tag feeder, the push rod and the feeding mechanism.

Abstract: A method of reinforcing a structural assembly having an elongated panel with spaced front and rear thin metal walls. One of the panel walls is lanced to form a tang transverse to the elongated panel and attached at one end to the wall and having its opposite end free. One of the panel walls is also lanced to form a resilient tang spaced from the transverse tang and longitudinal to the elongated panel which tang is attached at one end to the wall and its opposite end is free. Both tangs are bent away from their respective walls. A reinforcing member is formed having a length slightly less than the distance between the spaced tangs and a thickness slightly less than the distance between the front and rear walls of the panel.

Abstract: This invention relates to a process for connecting an element to the end of a tube of composite material, wherein, at least at said end, said tube presents an annular cross-section of which the outer and inner contours are each constituted by a circular line or with interference of shapes, for example polygonal, and said element comprises a recess defined between two spaced apart coaxial prismatic or cylindrical walls, the annular section of said recess corresponding to that of said end so that the latter may be fitted in said element with interposition of an intercalated sleeve made of high-resistance fibers impregnated with resin or polymerizable elastomer. The invention is more particularly applicable to the production of torque tubes or power transmission shafts made of composite material.

Abstract: Method and apparatus effective for emplacing a ring (52) at a selected axial location of a pipe (45) by reducing its diameter and establishing a circumferential bulge (146) adjacent to the selected location and ring (52), said bulge (146) cooperatively resisting axial displacmeent thereof and being in physical conformity therewith.

Abstract: An inner tube (1) and an outer tube (6) are provided of suitable shape and size for the inner tube to be received coaxially inside the outer tube, thereby causing the outside face of the inner tube to face the inside face of the outer tube. A neutron-absorbing screen (2) is fixed to one of said faces. The inner tube is inserted into the outer tube, and the inner tube is radially expanded into the outer tube while leaving the outer tube externally free to expand, and thereby plastically deforming both tubes and obtaining a solid single block assembly of desired shape and size for the container. The container may be used for storing radioactive material.

Abstract: A mechanical joint for interconnecting rail members having a male end on one of the rail members, a female end on the other rail member, and an annular collar for constraining longitudinal movement. The male member has an external circumferential groove for receiving the annular collar. The female end has an internal circumferential groove which aligns with both the annular collar and the external circumferential groove on the male end.

Abstract: This invention relates to a support bracket which positions the flow sensor of an IV pump or controller used in fluid administration systems for patients in medical care. Significant problems have been encountered when the flow sensor and the drop chamber to which it is attached become tilted during use causing improper operation of the system. This invention prevents such problems by securely mounting the IV sensor to the IV pole through the use of a support bracket.

Abstract: A tapping machine has a base plate fixed to one of the platens, a spindle extending along a spindle axis between the platens in the closing direction of the press actuating the machine, and a nut threaded on the spindle. The nut is normally rotatable about the spindle axis on the base plate and the spindle is fixed nonrotatably about the spindle axis on the other platen so that relative displacement of the platens rotates the nut in the base plate. An element displaceable on the base plate along an element axis but nonrotatable on the base plate about the element axis carries a plurality of tap holders generally fixed relative to the element axis in the element and rotatable in the element about respective tap axes parallel to the element axis. Respective taps are fixed axially and rotationally in the holders.

Abstract: In a cutting and mounting apparatus for cutting a film section (9) which can be lowered into a slide mount (10) positioned below a cutting tool (5) in a slider (7), and which upon withdrawal of slider (7) can be snapped into the slide mount (10) while resting agaisnt a guiding jaw (2a), a component (12), shiftably guided on the slider (7), is designed as a U-shaped resilient clamp enclosing the rear area of the slider (7). The component (12) comprises guiding elements (12b) which point in the direction of movement of the slider (7), and are formed by tongues pointing upwardly at an angle, seizing the rear edge of a bent film section (9) when the slider (7) has been partly extended, and deflecting said rear edge so that it snaps into the groove-shaped recess in the rear frame portion (10b) of slide mount (10).

Abstract: A machine tool having a table movable relative to a head for machining a workpiece mounted on the head by a tool mounted on the table. The table also supports a magazine for blank workpieces, and the table is movable between a first position in which the head and the tool are in machining proximity and a second position in which the head and the magazine are proximate. The head has a work holder adapted to grip a blank workpiece at said second position for transfer, by movement of the table, to said first position. After machining, the workpiece is correspondingly returnable to the magazine. The work holder is mounted on a spindle supported on the head and rotatable for machining purposes. In a modification the spindle supports a tool, and the head has a gripper which is separate from the spindle and is used for the transfer of workpieces between the magazine and a work holder mounted on the table.

Abstract: The device comprises a series of tool carriers each of which is provided with a tool, a connector tang and aseries of three abutments disposed substantially around the axis of the tool and in a plane orthogonal to the axis itself, a rack provided with a plurality of seats each of which is able to support a tool carrier, a support unit fixed to the head of the machine is provided with a series of frontal surfaces operable to constitute bearings for the said abutments; this unit is provided with connector means operable to grip the connector tang of one of the tools, and displacement means operable to support the connector means and to displace it with respect to the support unit in the direction of the axis of the tool from a first position in which the abutments of the said series of abutments are at a predetermined distance from the frontal surface of the first defined series, to a second position in which the abutments themselves are in contact with the frontal surfaces, the displacement from the first to t

Abstract: The center comprises a conveyor, a motor-driven carriage equipped with a gripper to move a section (2) over the conveyor, along a numerical axis toward the fixed frame (7) of a machining station, and a vise (11).In accordance with the invention, the machining station includes only the following: two moving elements (16, 21) adapted to move along cross-axes, the first said element (16) being movable relative to the fixed frame (7) and the second (21) being movable relative to the first (16), said second moving element (21) carrying a swivelling spindle head (25) equipped with at least one tool (5).Also, the actuator (22) which controls the movement of each said element is a multipurpose actuator selectively controlled by the main numerical control program to execute either positioning-only commands, or feed-only commands, or combined commands, among others.

Abstract: An improved method of manufacturing a semiconductor accelerometer having a cantilevered beam is shown. In the fabricating process a semiconductor substrate is divided into p-type regions and n-type regions. The substrate is immersed into an electrochemical solution with a cathode and a suitable voltage is applied. Certain portions of the substate are protected from the etching by the voltage such that the semiconductor substrate is etched to form the cantilevered beam.

Abstract: The dielectric stability of a hermetically-sealed solid-electrolyte tantalum capacitor during high temperature storage is improved by the introduction of a small controlled amount of water into the capacitor container before the final sealing step in the manufacture of the capacitor.

Abstract: A method for manufacturing a semiconductor photoelectric conversion device including forming a first impurity doped non-single crystal semiconductor layer of a first conductivity type on a substrate; forming an intrinsic non-single crystal semiconductor layer on the first semiconductor layer; forming a second impurity doped non-single crystal second conductivity layer type opposite to the first conductivity type on the intrinsic layer; irradiating the outer surface of the second impurity doped semiconductor layer with light energy of suitable wavelength which is effective to selectively crystallize the second impurity doped layer; irradiating the outer surface of the second impurity doped semiconductor layer with light energy of suitable wavelength which is effective to selectively crystallize the intrinsic semiconductor layer, whereby only the portion of the intrinsic semiconductor layer adjacent the impurity doped semiconductor layer is crystallized.

Abstract: A method of passivating a gallium arsenide surface includes the steps of implanting a subsurface layer of nitrogen ions and annealing and reactive the nitrogen to form a layer consisting primarily of gallium nitride.

Abstract: In one embodiment of a vertical bipolar transistor constructed in accordance with the teachings of this invention, oxygen is implanted into the vertical bipolar transistor to provide a silicon dioxide layer between the base and collector of the vertical bipolar transistor. This silicon dioxide layer reduces the actual interface area of the base to collector junction, thereby decreasing the capacitance of the base-collector junction. In addition, the dielectric constant of the silicon dioxide layer is such that the capacitance across the silicon dioxide layer, and thus between the base and collector, is minimal relative to the base to collector capacitance provided by the base to collector junction itself. In an alternative embodiment, nitrogen is implanted to form silicon nitride regions rather than silicon dioxide regions.

Abstract: A parts mounting apparatus has a plurality of suction nozzles for picking up and holding the parts, the nozzles intermittently moving along a closed path to stop positions arranged at predetermined set intervals along the path, including a parts pickup position at which parts are picked up by the suction nozzles and a parts mounting position at which parts are mounted on an article on which parts are to be mounted. A position adjusting device is provided between the parts pickup positions and the parts mounting position for adjusting the position of a part held on a suction nozzle to orient the part relative to the longitudinal axis of the suction nozzle in two directions at right angles to each other and perpendicular to the longitudinal axis of the nozzle.

Abstract: An improved and novel lag screw driving apparatus whereby a screw along with a hanger formed thereon is threaded into a wooden ceiling member or the like from floor level. The apparatus comprises a handle having a wire magazine, a wire magazine loader mounted above the handle and through which wires have ingress to and egress from the magazine, a head or holder for an eye-screw mounted on the magazine loader, at least one pair of longitudinally-split sleeves spaced one from another and to which tubular members forming the magazine and the magazine loader are clamped. Each of the split sleeves includes a ledge from which smaller and larger bores in opposing directions extend. A clamping means across the split of each sleeve and to each side of the ledge is provided so that handle tubing and the magazine loader which are inserted into the bores of the sleeve are secured therein. Chamfers along the split are provided.

Abstract: A multi contact connector includes a ground terminal block and signal and power source terminals connected with tape wires. Bare wires of the tape wires connected to the signal and power source terminals are provided with roundabout portions respectively to form slacks in the bare wires. With this arrangement, when external tensile forces act upon the connector, the slacks prevent disconnection of bare wires for signal and power source terminals indispensable for operation of the connector, even if a few bare wires among a number of bare wires connected to the ground terminal block are disconnected.

Abstract: A plated metal assembly used for packaging hybrid microcircuits features both insulated and grounding leads plated with successive layers of nickel and gold, the leads attached to a metal header which is plated only with nickel. A method for mass producing the assembly includes pre-plating the grounding leads, and brazing them to the header after the header and insulated leads have been assembled and plated.

Abstract: A method of producing a nonwelding contact assembly for an electrical switch using a composite contact material formed by extruding a metal oxide core surrounded by a metal or metal alloy sheath with good welding properties to form a wire of core material having a layer of the metal or metal alloy metallurgically bonded thereto. A segment of the wire is resistance welded to a contact carrier and coined to the desired contact shape, after which the layer on the contact surface is sufficiently thin that it is oxidized to provide nonwelding characteristics after a few switch operations.

Abstract: The tool includes a fixture for locating a coaxial cable lengthwise in a predetermined position and for confining the tool to turn about the axis of the cable. Pivotally mounted on the fixture is a cutter arm having a pair of spaced blades positioned to cut the cable to two different depths at two axially spaced locations. After the cutter arm has been pivoted downwardly to an active position, the tool is rotated about the axis of the cable. As an incident thereto, one blade cuts an outer insulating jacket, an outer conductor and an inner insulating sheath away from an inner conductor while the other blade simultaneously cuts the outer insulating jacket away from the outer conductor at an axially spaced location.

Abstract: A one piece blade holder having a handle portion for serving as a hand grip when the holder is used as a razor blade scraping tool. A plurality of opposed, interdigitated finger members extend from the handle portion and operate to hold a blade having a cutting edge in either a cutting edge exposed or cutting edge protected position. A pivoted locking member is provided for engaging the blade in either of said positions, the locking member has means for releasably engaging the blade and is pivotable between a rest position in which the blade is engaged with a locking pin and a pivoted position in which the blade is released from engagement with the locking pin.

Abstract: An embodiment of a quick change mechanism permits, without using hand tools, the very quick changing, in second, of circular saw blades and other spinning disc devices, which have diamond shaped arbor holes, in respect to the drive shafts of portable powered circular blade saws, and radial saws. No modification of most existing saws is required. At the location of the existing saw drive shaft, with its central threaded hole, the drive shaft bearing, and the saw body; this quick change mechanism is secured, using an installation bolt passing through it and into the central threaded hole of the existing saw drive shaft.

Abstract: A device to determine the operable failure mode of mechanically fastened lightweight composite joints by measuring the hole elongation of a bolted joint is disclosed. The double-lap joint test apparatus 10 comprises a stud 20, a test specimen 30 having a hole, two load transfer plates 31, and linear displacement measuring instruments 27. The test specimen 30 having a hole is sandwiched between two load transfer plates 31 and clamped together with the stud 20. Spacer washers 22 are placed between the test specimen 30 and each load transfer plate 31 to provide a known, controllable area for the determination of clamping forces around the hole of the test specimen 30 attributable to bolt torque. The spacer washers 22 also provide a gap for the mounting of reference angles 23 on each side of the test specimen 30. Under tensile loading, elongation of the hole of test specimen 30 causes the stud 20 to move away from the reference angles 23.

Abstract: A borehole survey apparatus includes an angular rate sensor, a tilt sensor, a rotary drive to rotate the sensors about an axis extending in the direction of the borehole, circuitry connected with said sensors to determine the azimuthal direction of tilt of the borehole at a first location therein, drive control circuitry and a switch operatively connected with the sensors whereby they may be connected in feedback relation with the rotary drive so that an axis defined by a support for the rate sensor is maintained at predetermined orientation relative to horizontal during travel of the apparatus in a borehole relative to the first location, and integration circuitry connected with the rate sensor whereby changes in borehole alignment during travel may be determined.

Abstract: An attitude displacement measurement apparatus including a base, primary bearing means retained by the base, auxiliary bearing means mounted for rotation on the primary bearing means on a given axis with respect to the base, a first rotor mounted for rotation on the auxiliary bearing means on the given axis, a second rotor mounted for rotation on the auxiliary bearing means on the given axis, a first drive mechanism coupled to the first rotor and operable to produce rotation thereof on the auxiliary bearing means in one sense on the given axis, and a second drive mechanism coupled to the second rotor and operable to produce rotation thereof on said auxiliary bearing means on the given axis in a sense opposite to the one sense.

Abstract: A dehydrator for fluent materials includes a pulse combustor and a cyclone separator having a cylindrical cyclone chamber and a central gas discharge tube. The pulse combustor has a finned tail pipe which is contained within a casing disposed generally tangentially to a cylindrical wall of the cyclone chamber. Material to be dried is introduced into the tail pipe and is discharged in a spiral pattern that flows downwardly around the gas discharge tube. Material in the gas stream falls into a collection hopper below the cyclone chamber. Gases leave through the gas discharge tube. In an alternative embodiment, a simpler dried material collection chamber is used.

Abstract: In a papermaking machine comprising a drying section wherein a hood covers a series of dryer drums supported by the frame, the dryer drums convey an endless felt supporting a continuous sheet of pulp to be dried. At least one heat collector is provided for collecting high quality heat generated and concentrated in the immediate vicinity of the dryer drums. The heat collector defines an enclosure having bases, sides and ends wherein one of the bases is constituted by a plurality of the dryer drums. The heat collector also contains an exhaust system to separately evacuate the high quality heat collected within the heat collector from the low quality heat collected by the hood covering the dryer drums. The heat collector is preferably constituted of fabric material and the heat separately evacuated therefrom is recycled elsewhere in the plant to supply or release additional energy.

Abstract: An interchangeable shoe and slipper combination includes an upper having a front upper portion secured on a sole and a rear upper portion. A slide fastener couples or uncouples the front upper portion and the rear upper portion so as to assemble a shoe, or form a slipper by separating the rear upper portion from the front upper portion. A detachable heel is fixed under the sole, which includes several heel sections selectively fixed under the sole for adjusting the heel height of the shoe.

Abstract: This ski boot fastener comprises a stretching lever having pivotally mounted therein at least two nipples each fulcrumed on a crosspin, and boot closing cables having each one end passing through the corresponding nipple and anchored to a cable head or socket movable along the cable and reacting against the corresponding nipple. The head or socket consists of an internally screw-threaded tube engaged by an externally screw-threaded core soldered to the cable end. The adjustment is obtained by rotating the socket.

Abstract: A replaceable retention system for mounting golf spikes, cleats, and the like to the bottom of a shoe sole including a transverse plate and a holder. The holder is adapted to be insertable into a prepared cavity in the sole of the shoe and also includes an interior thread for receiving the threaded shank of a spike. The plate slidably engages structure in the holder which supports the plate in a transverse orientation to the interior thread of the holder whereby the threaded shank of the spike contacts and secures the plate in this arrangement. By this configuration, the plate may be inserted between the lower and upper layers of the sole for securely retaining the holder in position within the cavity in the lower layer of the sole. The removal and replacement of the plate, holders and spikes is thus facilitated by this invention.

Abstract: Ballast dressing unit (17) on machines (10) which dress and re-distribute railway road bed ballast, such unit (17) comprising at least one rotary dressing drum (23-24).

Abstract: The file is equipped with a plurality of bags, which are vertically stacked, between the front cover and the back cover being unfoldable. The vertically adjoining bags are connected by way of the connecting part one to another and the upper bags can be shifted from the lower bags in the direction opposite to the opening section within the allowable range of the connecting part so that the opening section of the lower bags may be exposed from the upper bags. The knob is provided on the uppermost bag.

Abstract: Each picture frame cassette has a frame member with two crossing rectangular frames which surround a picture window. A back-plate is fitted at the rear of the frame member behind the picture window. The frame member and back-plate enclose a picture seating, the end regions of which are open at the rear for the fitting and engaging of photographs. The cassettes are secured together by tongues fitted in seatings in the back-plate and are engaged by projections with apertures in the seatings. Securing recesses and string are attached therein for hanging purposes.

Abstract: A display element has a rotor designed to assume 3 or 4 angular positions to display corresponding panels on a viewing direction. The rotor has a permanent magnet at an angle to the axis. The position of the permanent magnet and rotor are controlled by stationary pairs of pole piece tips adjacent but spaced from each other, located adjacent the locus of the magnet at locations spaced by the angle between adjacent locations.

Abstract: A vandal resistant mounting method and apparatus for an advertising display unit for use with a public telephone is disclosed. The advertising display unit mounting comprises a vertical post having, a recessed support in a front opening to secure the public telephone, and an advertising unit including a display wall having an aperture. The mounting disclosed operably prevents removal of the display wall from the post. The display wall has a least one laterally outwardly extending wall section adjacent the aperture of the unit for display of advertisements. Additionally, a transparent covering is attached to the display wall to operably shield the advertisements.