Abstract: The disclosure relates to a story book wherein the rear cover is of increased thickness so that it can hold the necessary transparencies and optics therein for viewing and wherein predetermined pages of the story book are provided with apertures aligned with transparencies and optics associated therewith so that the viewer can observe the scene being depicted on a transparency by locking through the aperture on the page. The transparency illustrations which are disposed in the book rear cover, in one embodiment, are encased in opaque tubes, each tube being aligned with one of the apertures on the book pages. Each of the tubes includes a magnifying lens on the side of the rear cover closest the apertures on the pages and a transparency of the scene to be depicted between the lens and the portion of the rear cover remote from the apertures.

Abstract: A piezoelectric resonator includes a base plate and a strip-type, energy trapping piezoelectric resonator chip mounted on the base plate. The piezoelectric resonator chip includes a piezoelectric chip plate and a pair of electrode patterns formed on the opposed main surfaces of the piezoelectric chip plate. One main surface of the piezoelectric chip plate faces the base plate and is parallel therewith, and a conductive layer is formed on each end of the main surface facing the base plate. The thickness of the conductive layer is greater than that of the electrode pattern so that the electrode pattern is separated from the base plate. The conductive layer is directly mounted onto a conductive portion of the base plate, so as to electrically connect the electrode pattern and the conductive portion of the base plate.

Abstract: A method for controlling the transverse thickness profile of paper or other web-like product by controlling temperature, including the axial temperature profile, of the mantle of a roll forming a nip with another roll in the manufacture of the paper or other web-like product includes forming a layer of heat transfer liquid on the inner surface of the mantle under the effect of the centrifugal forces generated by the rotation of the mantle, the layer of heat transfer liquid being divided into separate annular sections, and controlling the temperature of the heat transfer liquid layer of each of the sections. A roll in accordance with the invention includes a cylindrical outer mantle rotatably mounted at its axial ends, a stationary inner shaft situated within the mantle and partitions for dividing a layer of heat transfer liquid formed on the inner surface of the mantle into a plurality of separate annular sections.

Abstract: A roll for use in a calender has a stationary carrier for a hollow cylindrical shell whose end portions are supported by combined radial and axial bearings surrounding annular bearing members which, in turn, surround the end portions of the carrier. The carrier defines with each bearing member a set of chambers which are sealed from the atmosphere and can receive pressurized hydraulic fluid to ensure that the end portions of the shell are biased toward a second roll with a requisite force as well that the end portions of the shell are stabilized against lateral and/or other stray movements. The fluid in the chambers ensures that the shell can be acted upon by large forces without unduly stressing the antifriction bearings. The bearing members flank a hydrostatic bearing unit which acts between the central portion of the shell and the carrier.

Abstract: A roll for use in a calender has a stationary carrier which is surrounded by a hollow cylindrical shell with the interposition of a hydraulically operated displacing unit which can flex selected portions of the shell when necessary so as to establish a preselected nip between the peripheral surface of the shell and the shell of an adjoining roll. The hydrostatic displacing unit is flanked by two antifriction bearings which operate between the carrier and the shell and are lubricated by a circuit which is independent of the circuit that supplies hydraulic fluid to the displacing unit. This renders it possible to use in the displacing unit a fluid whose temperature is much higher than the maximum permissible temperature of lubricant for the bearings. The bearings are sealed from the respective ends of the displacing unit by single seals or by multiple seals, and any leak fluid which penetrates beyond the neighboring seal is evacuated through one or more channels in the carrier and/or in the shell.

Abstract: A variable-crown roll for forming a nip with a counter-roll includes a rotatably mounted roll mantle and a fixed central axle situated within the roll mantle defining a space therebetween in which nip profile adjustment devices, such as hydrodynamic glide-shoes mounted on pistons, are provided. The roll mantle is journaled on the central axle which in turn is supported at its ends at points axially outside of the journaling points of the roll mantle. An annular member is provided between each of the end portions of the central axle within the mantle or an extension thereof. A bearing or bearings for journaling the roll mantle on the fixed central shaft is mounted at each end of the roll between a respective annular part and an end region of the mantle or an extension thereof. Hydraulic power devices are provided at each end of the roll between the annular part and the end portion of the central axle which act in the plane of the nip.

Abstract: A glide shoe arrangement for a variable crown roll is disclosed. The roll comprises a fixed central axle on which a hollow cylindrical roll mantle is rotatably journalled. A series of piston-glide shoe arrangements are fitted along the length of the roll between the axle and the inner surface of the roll mantle and are adapted to be loaded by hydraulic pressure fluid so that each piston loads a corresponding glide shoe against the inner surface of the roll mantle to control the distribution of nip pressure in a nip formed by the variable crown roll and a counter roll. The piston-glide shoe arrangements are fitted in cylinder bores formed in the axle. Spherical surface bearings are fitted between the loading pistons and the glide shoes, the center of curvature or rotation of the bearing surfaces being located on the side of the glide shoe. A pin-shaped projection is fitted in the loading piston and extends through the spherical bearing.

Abstract: A fan assembly includes a propeller fixedly mounted on a shaft. The propeller has a rear side where fluid enters and a front side where fluid exits. The propeller has blades with an arcuate rib located on the front side of each blade. The arcuate rib may have curved outer surfaces at its outer ends and may be made up of portions formed about different centers of curvature.

Abstract: A pliers for inserting the ends of hoses onto hose fittings. The pliers include a first set of jaws adapted to engage the fitting, a second set of jaws for grasping the end of a hose, and handles which are movable in a pincer action to force the end of the hose over the end of the fitting. The fitting jaws are spring biased to adapt to fittings of varying sizes. The hose engaging jaws lock in place on the hose to facilitate assembly of hose and fitting.

Abstract: In an apparatus for removing fastener members, from a garment fabric by punching the fastener members, by means of a movable punch and a stationary die, a scrap-piece removal member is carried on a vertically movable punch holder around the punch and movable downwardly relative to the punch, in response to the upward movement of the punch holder, for automatically removing a scrap piece which is stuck to the punch as a result of the punching.

Abstract: This invention relates to a set of tools for removing lugless snap rings from the internal annular grooves provided therefor in parts containing internal bores, these tools consisting of a pointed tool for making an indentation in the base of the groove between the ends of the ring, a plunger-actuated ball magazine for placing a ball in the indentation thus formed preparatory to driving the ring aroung in its groove until one of its ends rides up upon the ball to create a gap therebeneath, a clamping tool for holding the ring in its groove against further relative rotation, a wedge for movement into the gap underneath the raised end of the ring, and a wedge-driving subassembly for moving the wedge into the gap to a point where the raised end of the ring is free of the groove and in position to be grasped and removed.

Abstract: This invention relates to an internal snap ring removal tool which is characterized by a first cylindrically-surfaced clamp-forming element clampable onto a surface of the snap ring exposed outside its groove while the cylindrical surface of the aforesaid element lies in essentially tangent relation to the bore of the part containing the snap ring, and an eccentrically-bored collar that encircles the clamp-forming element for relative rotation therearound in contact with the bore of the part housing the snap ring thereby camming the snap ring free of its groove.

Abstract: A jacking crane supported by four telescoping hydraulically powered legs is used to erect a two spaced apart parallel column drilling derrick. Each column is composed of a number of identical column sections which are assembled on site using the jacking crane which is supported in the space between the columns. The two parallel columns are erected by the jacking crane lifting sections one on top of the other. As soon as these newly added sections are secured to the previous sections, the legs of the jack which are supported from column sections are actuated to move the platform of the jack upwardly where it is attached to an upper portion of the partially completed columns and the legs are then released and then raised to a higher point where they are again attached. The crane lifts additional sections and is "walked-up" by stages between the two partially completed columns until the columns reach the desired height.

Abstract: A method for a cutting locking tab 56 and tool for a selected configuration on a joint (a pin (12a) and box (16a) threaded together). The pin has longitudinal slot(s) 24a and the box (16a) has inner and outer peripheral grooves (44,46) forming shear lines (50) to enhance the shearing to form the locking tab (56).The essential feature is the elimination of clocking, i.e., a predetermination of the relative orientation of the box and pin during manufacture.

Abstract: Method of providing the inner side of a neck of a vessel with a synthetic sleeve provided with inner screw thread for a closure stop (15) said sleeve being provided with an outer collar (8) with the shape of a truncated cone having its smallest diameter at the outer end and smaller than the inner diameter of the neck (3) and its largest diameter larger than the inner diameter of the neck, which sleeve in heated condition is pressed into and through the neck until the collar snaps outwardly over the edge of the neck.

Abstract: A novel process and system is provided for protecting oil filed tubular goods such as subs, drill pipe, casings, tubing, drill collars, line pipe and the like having threaded or machined end coupling portions, against rust, pitting and moisture induced corrosion damage, wherein the machined, threaded or tool joint area of such tubular product are coated with grease, dope or like protective compounds and then is encased and protected against the weather and moisture attack by a shrinkable plastic wrapping enveloping end portions of the machined and grease coated tubular products protecting them by a shrink wrap encasement of low density polyethylene film or the like.

Abstract: A rivet has a head and an elongated shank of generally circular cross section extending axially therefrom. The head has a periphery including a multiplicity of spaced portions projecting radially outwardly of the periphery of the shank and at least three guide portions between these projecting portions which provide guide surfaces extending axially of the rivet with their root surface disposed in substantial axial alignment with the periphery of the shank. The head may have a configuration shaped like a dome, or an inverted frustoconical element, or a prism, and the guide portions can be arcuate in transverse section or rectilinear. The rivet shank may have a groove along its length to facilitate securing of the workpieces therewith without requiring upsetting of the shank, and the shank may have a sharp cutting edge at its free end to facilitate penetration of the workpieces to avoid the necessity for predrilling and the like.

Abstract: The axially movable pressure plate of a friction clutch for motor vehicles is non-rotatably secured to the housing by a set of leaf springs each of which has an end portion overlying that surface of the pressure plate which faces away from the clutch plate. The end portion of each leaf spring has an opening in register with the open end of a blind bore in the surface of the pressure plate. Such end portions of the leaf springs are permanently fastened to the pressure plate by tubular connecting elements having (a) enlarged end portions overlying those sides of the leaf springs which face away from the pressure plate and (b) main portions which extend through the respective openings and into the registering blind bores and are radially expanded into pronounced frictional engagement with the pressure plate.

Abstract: A transmission is disclosed for rotating the work supporting chuck assembly of a power driven threading machine at low and high speeds. The transmission includes a sun gear, a ring gear coaxial with the sun gear and axially shiftable between first and second positions relative to the sun gear and to a fixed clutch component, and a plurality of planet gears between the sun gear and ring gear. The sun gear is motor driven to provide the transmission input, and the planet gears are connected to and drive an output sprocket wheel drivingly connected to the chuck assembly. The first position of the ring gear provides clutched interengagement thereof with the sun gear for rotation therewith, whereby the planet gears rotate therewith to rotate the output sprocket wheel at a first speed equal to the speed of rotation of the sun gear.

Abstract: A machine which separates pallet boards from their connecting stringers by sawing essentially through their attaching nails only, thus minimizing damage to the boards so that they can be reused.In order to separate and loosen the boards so that only the nails are cut a pressing device is designed to squeeze the sides of a pallet inserted within it. Then the loosened pallet, with the boards lifted so that there is space enough for a saw blade to be inserted to cut the nails only, is sent through the previously described sawing machine.

Abstract: A component lead cutting and forming apparatus for radial lead electrical components secured to tape, including first and second stations for processing each of the electrical components. The first station includes clamping apparatus for strain relief clamping the component lead, and also for supporting and aligning the body of the component. Blades and bending dies located at the first station cut and form a selected lead. The second station includes clamping apparatus for strain relief clamping the remaining uncut leads, and also includes blades for cutting the remaining uncut leads.

Abstract: An armature conductor to commutator bar connection. The bars of the commutator have radially extending slots that are defined by surfaces that taper outwardly. The ends of the armature conductors are formed to a generally wedge-shaped configuration such that the side surfaces are tapered inwardly. After the ends of the armature conductors have been formed to the tapered shape they are pushed into the slots of the commutator bars to such a depth that there is an interference fit between the side surfaces of the ends of the armature conductors and the tapered walls of the slot to lock the ends of the armature conductors to the commutator bars. After the ends of the formed armature conductors have been pushed into the slots, portions of the commutator bars are staked over into engagement with the top armature conductor end.

Abstract: A collector ring installation and lead terminating assembly comprising cooperating terminals (40,40'), poke-in terminals (60,60'), and collector ring leads (50,50') for forming an electrical connection between a collector ring assembly (30) and a rotor winding of a rotor (10).

Abstract: A rotor assembly particularly suited for use in oscillating electric motors includes magnet assemblies mounted on stiffening rings. The stiffening rings and magnet assemblies are bonded together by an intermediately disposed matrix. Each stiffening ring includes at least two radially outwardly extending tangs, the tangs separating adjacent pairs of magnet assemblies. In operation, these tangs function to support the magnet assemblies, particularly against cyclic fatigue loads developed in oscillating electric motors.

Abstract: A method of assembling a switch and terminal assembly with an end frame of a dynamoelectric machine. In this method, a casing of the switch and terminal assembly is arranged in an assembly position on the end frame, and a separate ground terminal is associated with the casing so as to be arranged generally in row formation with an electrical connection section of at least some of the terminals of the switch and terminal assembly. The ground terminal is then secured in ground circuit relations with the end frame.

Abstract: A method and apparatus for manufacturing wooden pallets including a vertically-reciprocating nailing head for nailing deckboards to stringers and a limit switch arrangement for adjusting the stroke length of the nailing head individually for each deckboard, so that in each deckboard, all of the nails will be driven to a uniform vertical position. A gripper carriage effects horizontal movement of pallets at various stages of completion. Hydraulic drive means are provided for both the nailing head and the gripper carriage.

Abstract: A movable working head carries a pair of drive rollers, an insertion quill, and a routing nozzle that are manipulated so that a first terminal on one end of a wire is grasped between the rollers and inserted into the quill which is then inserted partly into a connector aperture. The rollers are rotated to drive the wire and terminal through the quill into an engaged position within the connector, terminal insertion is tested, and the insertion quill is replaced with the routing nozzle so that the working head can traverse a harness routing path with the rollers and nozzle sliding freely along the length of the wire towards its other end. Near the second end of the wire, the rollers grasp the second terminal pin, rotate with the pin 180.degree. about an axis parallel to the roller axes and are moved to insert this terminal pin into the insertion quill so that the working head may move the quill and rollers to a second connector.

Abstract: (a) This installation comprises means for positioning and holding car body parts and devices for welding these parts to one another. (b) This installation is characterized in that it comprises a rigid, fixed stand (1) provided in its upper part with a horizontal conveyor track (11) for carriages (12) referred to as upper carriages each having elements for positioning and holding components of the upper part of a particular car body model of the motor vehicle, and provided in its lower part with a lift (8,10) containing centering devices cooperating with the components of the lower part of a type of motor vehicle body, which lower part is common to several models.

Abstract: A vehicle body assembling line includes a door installing station where vehicle side doors are installed on the body. In the installing station, there is an installing robot which is planned to operate in a predetermined sequence to install the doors on the vehicle body. For supplying appropriate doors to the installing robot from the door storing sections, a door pick up mechanism is provided to pick up an appropriate door from the storing section and a door transferring carriage is provided to receive the door from the pick up mechanism and transfer to the robot. The arrangement can afford an effective door installing operation.

Abstract: There is disclosed an improved apparatus for joining a plurality of pieces of sheet metal or other sheet material items by first drawing and then laterally extruding portions of the material to be joined into an enlarged shape which will permanently mechanically interlock the sheet material pieces. The apparatus utilizes a novel die construction in which portions thereof are resiliently biased toward one another and pivot or slide laterally in response to lateral extrusion of the joining material, and which is applicable to conventional "lanced" type joints as well as to a novel leakproof joint. A method of forming a leakproof joint between a plurality of pieces of sheet material and a method of fabricating a novel die construction are also disclosed.

Abstract: Surface mount networks and methods of making. One form of a network is a single in-line network. According to one method all components are mounted within a bar stock of generally rectangular cross section, the components have end caps disposed over a cylindrical body portion, which body portion is received within grooves on the bar stock material, and the end caps extending to the sides of the bar stock. A portion each of the end caps lies in a plane to one side of the bar stock so that the network can be mounted on the conductive traces of a printed circuit board. The single in-line network may also be molded to its final configuration. In another form two in-line networks are provided with a bus between adjacent end caps, a portion of the cylindrical wall surface of the end caps lying in a common plane on the periphery of the network and being adapted to be surface mounted onto the conductive traces of a printed circuit board.

Abstract: A coin roll cutter comprising a body to be clasped in a user's hand, an arcuate member adjacent to and normally spaced from the body and having one end connected to the body for swinging movement of the arcuate member toward and away from the body, and a cutter extending from the body into and terminating within the arcuate member when the latter is in its normal position, swinging movement of the arcuate member, as by a coin roll engaged in the concave side of the arcuate member serves to project the cutter beyond the arcuate member into cutting engagement with the wrapper for the coin roll.

Abstract: A cutter type knife comprises a hollow handle, a housing in said handle adapted to receive a removable blade fixed in position relative to said handle and projecting at least partly from one end of said handle. A blade cover is slidably disposed within said handle to be movable axially between a first position in which it is retracted into said handle and a second position in which it is adapted to surround or cover the part of said blade projecting from said handle. Means are provided for moving said blade cover between said first and second positions consisting of a trigger pivoted to said handle and a transmission mechanism is adapted to convert rotation of said trigger into axial displacement of said blade cover within said handle, whereby when said trigger is depressed said blade cover is moved to said first position.

Abstract: The effective reach of a chain saw is increased by drive transmitting extension structure which is interposed between the cutting head and motor and handle unit. A first gearbox is attached against a side of the motor and handle unit and contains a pair of orthogonally positioned engaged bevel gears one of which is driven by the drive output element of the motor. A drive shaft extends forward from the first gearbox within a tubular extension arm to a second gearbox to which the cutting head is secured and which transmits drive to the cutting chain drive sprocket. The extension maintains the center of mass close to the operator to minimize strain on the operator and is largely free of exposed moving parts and structural convolutions that could entangle foliage during tree trimming operations or the like.

Abstract: An archery bow sight includes a plate arranged for removable attachment to the handle portion of an archery bow and supporting a longitudinally extendable mounting arm which mounts at its forward end a horizontally extending support to which a vertically elongated sight bar is mounted for horizontal windage adjustment. The sight bar mounts a plurality of sight pin blocks by means of interconnecting dovetail components, the blocks extending transversely across the sight bar for adjustment along the length of the sight bar. An elongated threaded sight pin member extends adjustably through a threaded bore in each block in the transverse direction of the sight bar, and a slot intercepts the dovetail component and sight pin bore in the block. A clamp screw in the block extends across the slot and operates upon rotation in one direction to clamp the block to the sight bar and the sight pin to the block.

Abstract: A vial retaining assembly for a level or like object employs a retainer member for securing the vial in a mounting receptacle of the level. The retainer member comprises a first set of generally radially extending ears which frictionally engage the wall which defines the receptacle. A second set of radially extending ears forcefully engages the end of the vial to secure the vial in fixed relationship within the receptacle.

Abstract: A ruler for use in the measurement of distances on a flat surface is disclosed herein, having an elongated base with raised edge marginal regions defining a T-shaped recess therebetween. A first edge marginal region displays a plurality of analog measurement increments in the form of transverse marked lines while numerical indicia associated with each line increment is carried at the bottom of the recess. A cursor having an inverted T-shaped portion is slidably engaged with the base T-shaped recess. The cursor further includes a guide rail on one side frictionally engaged with a track provided on a second one of the edge marginal regions while cantilevered finger having an index line thereon projects over the first edge marginal region for selected registration with the end of an object being measured.

Abstract: A method of drying a formed ceramic mass having an end face in which holes are open, including preparing a jig having at least one projection which protrudes from a surface of the jig, holding the jig in abutting contact with the end face of the formed ceramic mass such that the at least one projection pierces or penetrates a portion of the formed ceramic mass adjacent to the end face, and then drying the formed ceramic mass. The jig is effective to protect the formed ceramic mass against distortion in the drying process.

Abstract: The system comprises a settling tank with a steam heating coil, connected via a pipe conduit to a sludge pump and a sludge tank in which the sludge and fuels are collected. The settling tank is also connected to a control unit which comprises gate valves, a funnel and a drain for visual inspection of the mixture. The tank is also connected to an evaporation vessel via valves, pipe conduits and a fuel pump, while the evaporation vessel is connected to a condenser. The latter is connected to a condensate vessel via an overflow pipe. In its bottom portion the condensate vessel is connected to a disinfestation tank, and in its top portion--to the vacuum side of an ejector, the pressure side of which is connected to the condenser.

Abstract: A suction transfer device located over a length of a single continuous dryer fabric extending between two rolls and below which length the web to be dried extends, with the device producing preferential negative pressure in active sections at the edges of the fabric with relation to a relatively inactive central section between said active sections.

Abstract: A sole structure of a shoe, e.g. a sport shoe, comprising an outer wearing sole, an inner or intermediate layer, and additionally a cushioning and supporting structure between the sole and layer. The cushioning and supporting structure has a flexible toe portion extending substantially from a tip of the shoe to a ball area of a foot in the shoe, a resilient heel portion tapering in a wedge-like manner from a rear edge of the shoe towards the forward tip of the shoe, and extending at least over a heel area of the shoe, and additionally a body piece fitted above the heel portion and substantially extending from the rear edge of the shoe to the ball area of the foot, over a zone adapted to fit against the heel of the arch of the foot. The body piece is substantially stiffer and harder than the heel portion and the toe portion.

Abstract: A ski boot comprises a foot-encasing shell body having front and rear cuffs, each being pivotally engaged on opposite sides to the shell body for relative movement away from each other into boot-open position and toward each other into boot-closed position; there being an inner boot member. A boot tightening element is carried on the rear cuff with a pair of elongated cables extending forwardly along opposite sides of the boot from said element. Each cable in the forward portion thereof being operatively related to a pressing pad overlying the inner boot member in the portion thereof disposed upon the wearer's foot between the ankle and instep. A guide is carried on each side of the shell body for training thereabout of an intermediate portion of the related cable.

Abstract: The present invention relates to an improved portable power shovel including a shovel portion and a base portion. The shovel portion includes a handle which is to be gripped by the operator, a blade for digging and two hydraulic rams connected to the blade, a first of the rams being provided to reciprocate the blade so that it may dig into a desired area. The second hydraulic ram is connected to the blade so that movements of the second hydraulic ram result in pivoting motions of the blade so that the blade may loosen dirt or other materials at the location where the blade has been inserted through reciprocations of the first mentioned hydraulic ram. The base is connected to the shovel portion and is provided so as to connect the shovel portion with the surrounding walls and ground area so that reciprocations of the first hydraulic ram will have their maximum effect.

Abstract: A sign in accordance with this invention comprises a pair of end members, with each end member having a longitudinal groove, and with each of the end members having a foot portion configured such that the respective longitudinal groove bears approximately a 15.degree. relationship to the vertical. The longitudinal groove in one of the end members faces the longitudinal groove in the end member such that respective ends of a generally rectangular sign of appropriate thickness may be closely received in these grooves. Importantly, the groove in each of the end members is of dual width, with one portion of each such groove being wide and of comparatively shallow depth, whereas another portion of each of the grooves is comparatively narrow, and of greater depth. Because of this arrangement, elongate panel members of either of two different thicknesses can be readily received in a tight fitting manner in appropriate portions of the grooves.

Abstract: A calendar comprising a plurality of sheets hinged along one edge. Each sheet comprises spaced removable postcards along the free edge thereof with one part of a month printed on one side of the sheet and another part of a month printed along the other side of the sheet. The portions of each sheet between the postcards are aligned when the sheets are folded against one another and aligned openings are provided in the portions such that the calendar can be opened and suspended with one side of one sheet being visible with a part of a month visible and the side of a succeeding sheet being visible with the remainder of the month showing and such that the postcards can be removed along weakened lines leaving the remainder of the calendar intact.

Abstract: An article for producing an interesting visual effect is disclosed. The article has a translucent or transparent conduit extending in a loop defining a path of fluid flow. A portion of the loop is contained in an opaque container and a portion extends out of the container. A pump moves a stream of liquid containing phosporescent particles through the conduit. A light in the container charges the particles immediately prior to their movement through the portion of the conduit outside the container where the glow from the moving particles are observable through the conduit wall. Continued operation continuously moves the particles past the light for recharging.

Abstract: A display apparatus includes a mechanism for storing images on a plurality of partially transparent sheets. Each sheet includes several rows of graphic material separated by rows of transparent areas. The sheets are relatively stiff so that they do not wrinkle or buckle under their own weight and are supported on upper and lower edges by tabs. A drive mechanism brings one sheet into viewing position as another sheet simultaneously withdraws in the same direction to produce a smooth dissolve of the projected image. Silk screened stripes of material on the sheets prevent the sheets from rubbing against each other and harming the graphic information and otherwise prevent mechanical interference between the sheets. By contouring the surface of the screen, it is possible to create a three dimensional image by illuminating the rear surface with a television screen or other image storage or producing means.

Abstract: Pistol for slaughtering animals with captive projectile and hinged breech block, the breech block 13 being automatically locked to the breech 10 before the explosion by means of a balancing lever 37, inside the breech block, having a head 40 at one end for cocking the percussion pin 50 and a tooth 39 at the other end that fits onto a tooth 36 on the breech, the initial stroke made by the trigger 72 causing rotation of the lever 37 and hook-up onto the breech 10, continuance of the trigger's stroke causing said hook-up to be strengthened, releasing the percussion pin 50 for its forward movement.

Abstract: A trigger fired underwater firearm particularly adapted to defense against sharks is described. The firearm has an elongated tubular handle with a cartridge receiving head at one end, a trigger mechanism in the middle, and a safety mechanism at the other end. A longitudinal shaft extends down the tube and has a firing pin at the end which engages the firing head and a safety pin where the shaft passes through the safety mechanism to the external cocking grip. Pulling back on the cocking grip on the end of the shaft stores energy in a firing spring. The firing mechanism uses a cocking notch in the interior elongated shaft to engage a moveable pawl on the end of a firing lever extending through the tube wall. Depressing the external end of the firing lever releases the pawl from the firing notch allowing the shaft carrying the firing pin to advance under spring pressure to hit the firing pin against the cartridge primer in the head end. The cartridge fires through the open end of the head into the target.

Abstract: An electrical trigger mechanism for a gun 1 has a relatively small and lightweight firing pin 5 which is held in its stationary position shown in outline 5.sup.1 by a permanent magnet 2 or the like and in which position the firing pin is spaced apart from a solenoid coil 4.A capacitive discharge circuit discharges through the solenoid coil upon operation of the gun trigger, the movement of or pressure on the gun trigger being detected by any suitable triggering means such as an optical interrupter, a microswitch or a strain gauge. The energizing of the solenoid coil 4 is for a sufficiently short time that the magnetic field has decayed or substantially decayed by the time the firing pin reaches the coil 4. The firing pin is therefore not restrained as it passes through the coil 4 into an abuttment member 6 which has a substantially central aperture through which the firing pin 4 can project in impacting against the bullet or cartridge 9 in position within the barrel 8.