Abstract: A plurality of pins (20) are supported by a shuttle (42) with shanks (21) of the pins extending freely from the shuttle. The shuttle (42) is manipulated to insert the shanks (21) into a pin-insertion head (127). The shuttle (42) is then withdrawn from the pins (20) whereby shanks (22) of the pins extend freely from the head (127). The head (127) is then moved toward a board (24) to insert the pins (20) into apertures (23) of the board.

Abstract: A cutting tool for cutting open corrugated shipping cartons includes a cutting blade and a holding arrangement for the cutting blade. The holding arrangement includes a holding member on which the cutting blade is held in its cutting position by being accommodated in a recess and having a stationary pin extend into a slot thereof. The holding arrangement includes a contact surface which engages the edge region of the respective carton at the side wall thereof, and a distancing surface which engages the top wall of the carton during the cutting operation to determine the distance of the cutting blade from the top wall, while the contact surface determines the degree of penetration of the cutting edge of the cutting blade into the interior of the shipping carton. These surfaces are so positioned as to avoid any damage to the contents of the shipping carton.

Abstract: An automated sign generator produces large scale text on sheet material by means of a cutting tool which is guided relative to the material in accordance with preprogrammed data. The sheet material is supported for movement in one coordinate direction relative to the tool by a feed roller, and the cutting tool is supported for movement in an orthogonal coordinate direction parallel to the roller. Several cutting tools are employed and one of the tools is heated to penetrate through a vinyl sign material that is releasably secured by a pressure sensitive adhesive to a paper release liner. A plotting tool can also be substituted for the cutting tool to plot the sign on plain paper. The sign generator is controlled by a microprocessor and the font from which the sign text is prepared in stored in a ROM memory. A keyboard coupled with the microprocessor is utilized to control the machine operation as well as compose the sign text.

Abstract: Inclination measurement apparatus having a housing, a reference pendulum mounted for swinging about one axis of the housing to respond to deviation of the housing means about such axis, an inclination indicator responsive to the inclination of such housing about another axis, and connected to such reference pendulum, whereby to adopt a predetermined reference position relative to such first axis, a movable locking device operable to restrain movement of such inclination indicator about such transverse axis and being releaseable to permit such movement, the locking device being movable into and out of engagement with the indicator device to secure such indicator device against movement about such transverse axis.

Abstract: A digital level is disclosed that includes a digital display for displaying the angle of inclination between a straight edge of a digital level and a desired reference plane. An alarm is also included to indicate whenever the digital level is held parallel to a desired reference plane, such as alevel horizontal plane, or a vertical plane. The level transducer employed within the digital level includes a rotating member that is weighted so as to always be aligned with a gravitational field in which the level is used. The body of the level includes flip-up sights so that it can readily be used as a transit. A microswitch located on the underneath side of the level automatically powers the circuitry used in connection with the sensing circuitry and digital display whenever the level is placed on a planar surface.

Abstract: A ruler, especially a parallel ruler having a parallel guidance system comprising a cord (6) extending between four points (A,B,C&D) and crossing itself diagonally in a corner to corner-fashion in the central portion of the ruler, which ruler consists of two flexible parts, a ruler body (1) and a finger rail (2) being in slidable engagement by dovetailing (9) and having clamping devices in both ends in the form of a tapped sleeve (3) and a screw (4) in holes (7), whereby, upon imparting upon the two parts a differently curved shape, the two parts may be clamped together showing a rise of the arch of the ruler, so that the ruler will more easily be pulled over the surface of the drawing-board.The central portion of the finger rail (2) may be removed, whereby the cord (6) may cross itself in this cut away-area (8). Such cord will not hamper the draftsman and will still be easily accessible for check and repair.

Abstract: A method and/or apparatus for drying material is provided, the method comprising the steps of disposing the material in a heating unit to have the heating unit heat at least part of the liquid particles of the material, disposing a charged electrode unit so as to be adjacent one side of the material when the material is disposed in the heating unit and to define a plurality of alternately directed electrostatic fields that are serially arranged in a like repeating pattern and that are substantially constant and non-oscillating so that the fields at least partially extend through the material while the material is disposed in the heating unit, and moving the material in one direction through the heating unit to cause at least a portion of the material to have the particles of liquid thereof serially moved through a field that tends to move those particles in one direction relative to the material and then into the next field that tends to move those particles in substantially an opposite direction relative to

Abstract: A method and apparatus for batch continuous laundry processing involves a system for continuously centrifugally extracting fluids from sequentially received batches of washed laundry. The discrete batches of laundry are continuously received by a conveying apparatus that automatically loads the batches into the discrete compartments defined within the segmented drum of the extractor. While the extractor is rotating, the conveying apparatus arranges a plurality of laundry batches to be quickly loaded into the extractor upon completion of the processing of the previous batches so that the conveying and processing is completely continuous and automatic. The conveying apparatus is vertically, laterally and longitudinally translatable to receive the batches from a washer at one level, to arrange the batches in two rows, and then to automatically feed them, for example two at a time, into the compartments of the segmented extractor.

Abstract: An apparatus for controlling the discharge of particulate solids through a discharge opening from a zone containing an expanded bed of particulate solids, the apparatus comprising a plurality of vertical doors positioned to open and close the discharge opening with the doors being adapted to open and close by rotation about a vertical axis; a mounting means to support the doors in position; and a controller adapted to control the opening and closing of the doors.

Abstract: An apparatus and process for drying lumber under vacuum conditions using a drying vessel operationally connected to a sump which collects the extracted moisture. Vaccum conditions are maintained in the vessel and in the sump within the range of 10,000 to 15,000 microns, which reduces the boiling point of water to less than 80.degree. F. The temperature within the vessel is raised to approximately 105.degree. F. by a heating source and this combination of reduced pressure and elevated temperature causes the moisture in the lumber to boil off as vapor. This vapor is condensed inside the vessel by refrigeration coils cooled to a temperature between 36.degree. F. and 42.degree. F., and the liquid condensed on the coils is carried to the sump through a drain pipe where it is pumped to waste disposal through a flow meter.

Abstract: The device comprises a tubular container having a closed end and an opening at the opposite end. The roller is inserted in the container by way of this opening. The container has internally spacer elements capable of receiving the roller in a position spaced from the inner surface of the tubular wall of the container and rendering the container connected to the roller for rotation with the latter. There is at least one outer cylindrical rolling surface on the container. For removing liquid from the roller, the latter is placed in the container and the assembly comprising the container and the roller is rapidly rolled on a surface so that the mixture of water and paint is ejected from the roller by centrifugal force and received in the container.

Abstract: A drying apparatus includes a cabinet, an open-ended drum having a horizontal axis disposed in the cabinet, support means for rotatably supporting the drum, an opening with a door disposed in the front panel and faced toward the open end of the drum, an air inlet port provided in the cabinet, an exhaust port provided on one side of the door on the front panel and communicating with the interior of the drum, drive means for rotating the drum in the direction in which the lower portion of the drum moves away from the exhaust port, and means for supplying heated air into the interior of the drum.

Abstract: This invention relates to a foldable, removable drier divider assembly with removable suction cup pieces that can be easily inserted into a household drier and quickly secured in its operating unfolded position to act as a drier drum divider for separating materials or objects during the drying process in order to dry several non-mixable materials or objects in one operation that otherwise would take several drying operations. The drier assembly consists essentially of a rotatable core unit with a plurality of divider fins extending from it whose outer periphery in their open operating position substantially fit and rotate with the interior of the rotating drier drum without rubbing against the stationary portions of the drier interior.

Abstract: A roller arrangement for the dryer section of a multi-cylinder paper machine wherein two carrier belts are entrained, applied to each other to form a chimney through which air drafts pass. A seal roll is disposed between the runs of the belts to be driven by contact with one belt, while providing a slight gap between it and the other belt which moves in the same direction, so that a flow of air counter to the draft is created.

Abstract: This invention relates to an improvement in heat-treating equipment for flat, band-like lengths of materials, using a gaseous flowing drying medium, said equipment being composed of a thermally insulated housing with transmission slots at both ends for a length of material, nozzle conduits arranged in sequential spacing above and below the length of material and directed transversely to the direction of motion of said material and being provided with nozzles and communicating with pressure chambers, at least one heat exchanger connected to suction chambers, and at least one circulating fan, the improvement comprising that the upper and lower nozzle conduits include ledge means between the spacings of the nozzles extending transversely to the length of material and forming together a backflow cross-cut means, cover means mounted between the nozzles of a nozzle conduit of the upper nozzle conduits, and the backflow cross-cut means between the ledges of the upper nozzle conduits being covered with stop means, an

Abstract: A ski boot and lever locking device includes a plastics boot body having a front opening defining an adjustable closure and an encircling element on the portion of the boot body affected by adjustment of the front opening and provided with traction elements toward the rear of the boot body.

Abstract: A front end loader has a loading bucket secured to a tractor and a transversely elongate cutter blade closely spaced forward of a lower front edge of the bucket. Improved apparatus for reciprocating the blade in forward and aft directions relative to the front edge of the bucket is disclosed. A force transmitting beam has a resonant frequency with at least one node and first and second anti-nodes at the resonant frequency. A source of vibrations at or near the resonant frequency is coupled to the beam near the first anti-node to vibrate the second anti-node about a neutral position. The beam is secured near one node so as to locate the neutral position of the second anti-node in spaced relationship from the cutting blade within striking distance thereof. The second anti-node thus applies unidirectional force impulses to the blade in a forward direction as the second anti-node vibrates to drive the blade intermittently forward.

Abstract: A desk clock and display stand is disclosed having a frame with a cell to retain a display module, the frame being tiltably held to a base by a hinge means. The hinge means has a male hinge element having a generally cylindrical pin included with the frame and a female hinge element having a socket included with the base. The display module retains pictures, clocks or both on the frame visible through a clear window. The display module has a first plate portion joined to a second plate by a bridge section to bias opposite edges of the module against opposite borders of the cell to retain the module in the cell.

Abstract: In a transparency mount of plastic a pair of flap-like covering members are hingedly connected to opposite outer edges of a substantially square base plate having a picture opening therein. The covering members are formed integrally with the base plate and are both adapted to be folded in over one side of the same, against which marginal portions of the transparency are to be seated. In their folded-in positions the covering members, which are generally rectangular in shape, overlap opposite marginal portions of the transparency but leave considerable area portions of the base plate outside the picture opening free, and these area portions are raised to lie substantially flush with the upper faces of the folded-in covering members, thereby stiffening the mount. In their folded-in positions the covering members are retained by pegs protruding from the base plate and entering mating apertures in the covering members, the pegs serving also as positioning means for the transparency.

Abstract: A device for sequentially exhibiting the individual charts in a stack of charts, each of the charts having a plurality of spaced notches along the lower edge thereof, the notches on consecutive charts being misaligned, comprising a display area having a lower shelf on which the stack of charts rest, the shelf being sloped forwardly and downwardly to direct the charts to and off the front edge thereof, a sliding comb assembly positioned adjacent the shelf, the comb assembly including a plurality of spaced teeth, the spacing between the teeth being the same as the spacing between the chart notches, the teeth extending upwardly and inwardly adjacent and along the front edge of the shelf to block movement of the charts off of the shelf except when the notches on a chart are aligned with the teeth, the comb assembly being slideable laterally relative to the shelf to align the teeth thereof with consecutive charts to deliver consecutive charts from the display area, and a spent chart magazine positioned to catch th

Abstract: A billboard apparatus includes a back for mounting to a support surface and including a pair of bottom tabs extending outwardly of the perimetric edge of the back. A pair of top tabs extend outwardly of the top edge of the back in a position and direction opposite the bottom tabs. A cover includes a planar body and a perimetric wall defining opposed pairs of bottom and top slots positioned to receive the bottom and top tabs, respectively, of the back. A pair of spring arms extend from the bottom edge of the back and engage the perimetric wall of the cover to urge the cover downwardly, thereby retaining the top tabs within the top slots. The bottom tabs extend sufficiently downward to be retained in the bottom slots when the cover is mounted on the back and resting with the perimetric wall lying against top edge of the back.

Abstract: A hypodermic dart gun of the firearm type includes a user-adjustable valve for regulating the feed rate of high pressure combustion gases from an exploded blank cartridge into the breech end of a gun barrel containing a hypodermic dart whereby the velocity of the ejected dart, and hence its effective range, is controlled. A pivotally mounted breech block for receiving the blank cartridge includes a baffle element for generating high combustion gas temperatures and pressures to ensure complete burning of the smokeless type gunpowder used in conventional blank cartridges. The adjustable valve forms a part of the breech block and is comprised of a high-temperature-resistant metering orifice whose cross-sectional area is determined by the position of a threaded member turnable in screwlike fashion into and out of a bore in a wall of the breech block.

Abstract: A hand held weapon is fitted with a safety device responsive to the palm or fingerprint of one or more individuals. The safety device is activated by heat sensed when the device is hand held. Unless the palm or fingerprint of the person holding the device matches a prestored pattern, a blocking safety mechanism, normally preventing operation of the weapon, is maintained in its "blocking state" and the weapon will not fire.

Abstract: A choke for a shotgun barrel comprises a sleeve body having an outer cylindrical surface and an inner surface with a conical rear section and a cylindrical front section. The conical section rearwardly widens from a mouth thereof and the sleeve body is positioned rigidly within a seat provided longitudinally in the gun barrel. The gun barrel has an inner diameter equal to the outer diameter of the sleeve body and an inclined plane surface defining a seat for receiving a bevelled extremity of the sleeve body. The inclined surface and bevelled extremity both form acute angles with the longitudinal axis of the barrel. An annular threaded projection on the outer surface of the sleeve body is threaded onto an externally threaded ferrul provided on the gun barrel.

Abstract: The disclosure describes a device which makes it possible to retrieve a fishing lure which has become snagged on an obstacle, such as rocks or branches, under water. It comprises prongs projecting on at least one side of an annular member in a plane perpendicular to the latter. The annular member is constructed so as to enable the fishing line to be inserted in the annular member at a point between the fishing lure and the fishing rod. A strong filament completes the device, and it is attached to the annular member. By sliding the device along the fishing line until it reaches the lure and moving it around with the filament it is possible, either to disengage the lure or pull it out of the water together with the obstacle.

Abstract: A fishing rod handle assembly with a hollow handle into which the base of a rod is secured and into which a series of attachable and interchangeable storage compartments, the bottom of each storage compartment forming the top of the next storage compartment by attachable means, may be inserted slideably into a hollow handle with attachable means in the end cap attaching to the hollow handle and with additional attachable means in the end cap attaching to a storage compartment.

Abstract: A fishing rod has at least one fishing line guide made up of a ring-like body with a high resistance to deformation and wear or abrasion, it being joined to the rod by a winding placed round it and the rod. The winding is made up of a high-strength fiber material having a low ultimate elongation, such as, more specially, carbon fiber, aramide fiber, boron fiber, glass fiber or polyester fiber. The ring body may be made of ceramic material, sapphire or a high-strength carbide and it may be seated on the rod itself or be spaced at some distance therefrom. In the case of a preferred process for producing such a guide on a rod, two template bodies of silicone rubber are slipped onto the rod so that two faces, normal to the rod, on the templates, are opposite each other falling in a space in which the winding may be produced. One such face has a pin for positioning the ring body to be fixed in position.

Abstract: A fishing lure is disclosed having a keel wire formed of spring material shaped to removably retain a barrel weight thereon. The weight can be changed to change the running depth of the lure by merely slipping the weight off the wire and slipping on a substitute weight of different size. The force required to remove the weight is selected to be lower than the force required to break the associated fishing line so that the lure can be retrieved when the weight becomes snagged by pulling the keel wire out of the weight.

Abstract: Fishing lure storage apparatus is disclosed having an elongated base section, a plurality of separate cover sections disposed over one side of the base section, the cover sections being arranged adjacent to and overlapping each other along substantially the full length of the base section with the exception of an exposed portion at one end of the base section. Each cover section is secured to the base section along a transverse line dividing each cover section into a pocket portion and an overlapping restraining portion with the pocket portion being of substantially larger size than the restraining portion. A first releasable fastener is disposed on the exposed end portion of the base section for joining a cooperating second releasable fastener disposed on the opposite side from the first releasable fastener. A mounting mechanism is disposed on the same side as the second releasable fastener.

Abstract: A bubble blowing toy features two bubble blowing loops connected by a common support member essentially tangent to the loops, with the loops disposed in perpendicular planes. The loops produce different types of bubbles. While one loop is being used to produce bubbles, the opposite end loop serves as a handle.

Abstract: A cooking toy having a motor-driven magnet beneath a simulated cooking element is disclosed. Various food preparation devices having magnets therein can be placed on the simulated cooking element that provide motions indicative of food preparation in response to the rotation of the motor-driven magnet. Simulated food members having a magnetic portion is also provided.

Abstract: This invention is a toy in which two principal assemblies of parts are made to counter-rotate by a concentric internal coil spring, previously wound up by hand, whose tension is maintained by a one-way clutch and is released when the weight of the toy, when it is placed on a flat surface, disengages the clutch. A carrying handle, in the form of a miniature fence of posts and railings, is attached to the upper assembly. A mechanism is incorporated to free the inner end of the spring from its arbor when the energy of the spring is spent, so that the assemblies may continue to counter-rotate by inertia without damage to the spring. The toy is equipped with a lighting system of flashing light-bulbs around the perimeter and in a central transparent cupola, supplied with energy from flashlight-type electrical batteries in a central tubular shaft through a switch on the upper assembly.

Abstract: A doll that may be actuated to simulate a swimming, walking or kicking action includes a torso with a pair of arms rotatably mounted thereto. A head mounting member is pivotally mounted to the upper portion of the torso and a leg mounting structure is secured to the lower portion of the torso. A pair of legs are pivotally mounted on the leg mounting structure in a manner to allow independent rotation. A compound cam is rotatably mounted in the torso and includes a helical groove in which a pair of cam followers are positioned that are in turn secured to each of the legs. A third cam follower is positioned within the torso to engage an eccentric cam that is part of the compound cam. The third cam follower is mechanically connected to the head mounting member resulting in pivoting of the head. A flotation device is arranged to be engageable by the doll's arms for use in the swimming mode.

Abstract: A toy vehicle which is capable of changing both its size and shape has a compound vehicle chassis having a first and a second chassis member. The chassis members are movable with respect to one another. The chassis members are connected together such that they can be moved with respect to one another reversibly between a first position and a second position. The body of the vehicle includes at least one movable member which is movably associated with one of the chassis members and is movable with respect to the chassis member with which it is associated with between two positions. The spatial relationship between parts of the body of the vehicle is changeable in conjunction with movement of the chassis members and the movable member between their respective positions.

Abstract: An electric motor driven toy wheeled vehicle is provided with a projecting shift lever movable through an "H" pattern for selectively shifting the vehicle into any one of neutral, two-wheel high speed forward drive, two-wheel high speed reverse drive, four-wheel low speed forward drive, or four-wheel low speed reverse drive. The front and rear axles with their respective wheels and drive gears are journaled for rotation in a chassis which also carries a gear box for lateral axial movement. A mount for the shift lever and motor is supported by the gear box for movement in the longitudinal direction of the chassis transverse to the axial direction. The gear box also carries a high speed two-wheel drive gear train continuously connected to the motor and which can be engaged by movement to one side to drive the rear wheels and a second low speed four-wheel drive gear train also continuously connected to the motor that can be engaged by movement to the other side to drive both the front and rear wheels.

Abstract: A herbicide application system employing a wick applicator in adjustable suspension with a three wheeled all terrain vehicle. The suspension system comprises a rectangular frame that is rotatably affixed to the ATV and to the wick applicator, such that the operator may independently adjust the angle of the wicks and the elevation of the liquid reservoir via an associated lever/linkage assembly and a tilt arm/spring loaded detent assembly.

Abstract: One block is movable with respect to another block, one of the blocks having a clamp which clamps the scion or root stock, and the other having knives facing the clamp, and in a configuration to remove a dovetail chip from both the scion and root stock so that the chip from the scion when inserted in the root stock recess exactly matches the recess, and the two cambia align accurately.

Abstract: A method for separation of seeds, in which the seeds are incubated in a suitable environment and then dried to produce a pronounced difference in moisture content between filled-dead seeds and filled-viable seeds. These two seed fractions are then separated from each other by utilizing the moisture content difference.The seed fractions may e.g. be separated from each other by placing seeds in a liquid the density of which is somewhat lower than the density of viable seeds but higher than the density of filled-dead seed. In such a case the filled-dead seeds will float up whereas the viable seeds sink.

Abstract: A hydroponic plant growing device comprising a container adapted to hold a particulate growing medium and nutrient solution and at least one siphon generating means with inlet opening communicating with the interior of said container and outlet opening communicating with the exterior of said container, the vertical dimension of said siphon generating means being such that the uppermost edge is positioned below the maximum fluid level of said container so as to allow passage of liquid therethrough before the liquid within said container reaches the maximum level.

Abstract: A fire door assembly for automatically closing an opening in a wall in response to a predetermined condition has two or more door panels, a connection system for connecting a side edge of one of the door panels to an adjacent side edge of the other door panel in an edge-to-edge relationship, and flame break barriers interposed between the side edges of the panels and the connection system to provide a flame-resistant barrier between the core of each panel and the connection system. Tie bars are secured to the top and bottom edges of the panels to reinforce the edge-to-edge connection. A support system for the door has a track that is free from all external interference to allow free passage of suitably configured rollers.

Abstract: Vibratory finishing apparatus comprises an elongated container having an open top. The container is disposed with its longitudinal axis horizontal and is divided into a plurality of individual compartments arranged in tandem. A plurality of drain orifices are provided in the bottom of such compartments whereby the flow of fluid and particulate matter is through each of said compartments individually from the top to the bottom thereof. Means are provided for vibrating the container and its compartments in unison. Minute vibratory motion between metallic parts and medium within such compartments and the futher enmasse orbital movement of such mass about a common longitudinal axis are utilized to finish and in some instances polish such parts.

Abstract: A measuring controlling device for a circular grinding machine including grinding means and workpiece retaining means for rotatably holding a workpiece to be ground comprises two measuring key devices and a measuring head for supporting the measuring key devices. The measuring key devices are located on a diametrical line extending through the central axis of the workpiece to be ground and are brought into contact with the outer surface of the workpiece therebetween. The measuring head is moved relative to the axial direction of the workpiece to be ground so that the measuring key devices can contact the entire outer surface of the workpiece. Consequently, the workpiece can be ground by means of the grinding means into a predetermined profile with reference to the actual profile measured by the measuring key devices.

Abstract: A rotary orbital sander including a motor housing enclosing a motor, a drive shaft rotatable by the motor, which drive shaft has an off-set projecting portion, a pinion gear housing affixed to the motor housing, a carrier supported upon the shaft off-set projecting portion by two parallel arranged ball bearings, a sanding pad assemblage removably attached to the carrier, intermeshing spur gears arranged on the pinion gear housing and the carrier, a handle arranged for conduction of pressurized pneumatic medium to the motor, a throttle valve for regulation of pneumatic medium flow to the motor, a valve in the handle for cut-off of pneumatic medium to the throttle value, and a counter-balance weight affixed to the shaft off-set projecting portion, said weight being positioned so that its center of gravity of rotation is in the same plane as the center of gravity of rotation of--the carrier, the carrier supporting bearings and a sanding pad assembly attached to the carrier--said pinion gear housing having a circ

Abstract: A tool and a grinding member for installing thereon comprising a support structure having inner and outer portions journaled for relative rotational movement, a guide member for mounting on an object having a surface to be ground, the guide member having a cylindrical portion that extends from the object in a position centered on the axis of the surface to be ground, the inner portion of the support structure having a surface for making sliding engagement with the cylindrical guide portion, a work engaging member for mounting on the outer portion of the support structure in position to engage the surface to be ground when the tool is moved axially along the cylindrical portion of the guide member, the work engaging member having a surface portion contoured to the desired shape of the surface to be ground and having surface grooves formed therein at spaced locations extending thereacross, and a layer of relatively hard, wear resistant materials and a binder formed on the contoured surface of the work engaging

Abstract: A method for crown grinding of gear teeth having lengthwise curved teeth and a grinding head for the performance of the method, wherein there are ground the outer and inner flanks by means of rotatable, individually driven grinding elements or bodies, which are mounted in a grinding head rotatable about an axis of rotation and, during grinding, forming an outer as well as an inner envelope surface which is coaxial with respect to the axis of rotation of the grinding head. In order to be able to crown grind teeth flanks with greater accuracy, the axis of rotation of the grinding head is adjusted in spaced relation from a computation point of a tooth lengthwise line of the tooth flank, which is different from the spacing of the computation point of the tooth lengthwise line from a center serving as the center for non-crowned tooth flanks.

Abstract: The generating method is accomplished at a machine containing one or two tools, constructed to possess a disk, cone or double-cone configuration, which are moved to-and-fro in a stroke-like fashion along the tooth flanks and can be advanced in the direction of the tooth flanks and act at one or two work locations upon a respective tooth flank. The displacement of the tool or each tool needed for producing the profile and longitudinal corrections is determined for each work location at the field of action or engagement zone of the teeth and is controlled as a function of the generating position and the stroke position of the machine tools according to predetermined functions.

Abstract: A telescopic multi-tier riser assembly formed from a plurality of telescopic multi-tier riser modules positioned in side-by-side relationship. Each said riser module is of a telescopic multi-tier construction and includes top and bottom platforms and at least one intermediate platform. The platforms are telescopically movable relative to one another between an open position wherein the individual platforms project forwardly in a step-like manner and a closed position wherein the platforms are vertically supported one above the other. The platforms each have a side-to-side width which is substantially less than its front-to-back length, which width comfortably accommodates only a single chair on the respective platform.

Abstract: A gutter guard and locking snap clip for the guard for use with rain gutters in order to prevent leaves and other debris from clogging the outlet of the gutter. The gutter guard is formed with louvre type slots to permit rain to pass therethrough to said gutter for runoff but prevent leaves or other debris from passing through the guard. The guard in one form of the invention is formed with at least one guide groove adjacent the forward edge of the guard. The guide groove is located in a plane below the plane of the adjoining surfaces of said guard and the clip can be moved through the groove. The clip is formed adjacent its leading end with at least one surface irregularity above or below the plane of said leading end, which is adapted to be engaged by or be positioned behind a reversely bent flange of the gutter return bead so as to removably lock the clip, and thus the guard, to the gutter.

Abstract: This invention relates to construction units and assemblies, and to structures fabricated from such units and assemblies, and is particularly concerned with stressed membrane structures, and specifically with modular, multiple membrane structures.

Abstract: A collapsible dwelling is provided, including a plurality of elements hingedly joined with each other, which, when in assembled relationship, cooperatively define a protective enclosure suitable for pets, or, when constructed on a larger scale, for young children. All elements are hinged strategically so that the elements can be partially disassembled and the aggregate parts stacked, one upon the other, for inclusion within a container having a length and width no greater than that of the largest elements. At least two anchoring loops are attached at opposing sides of the dwelling and are so situated that ground stakes capturing the loops can be driven into the supporting surface to positively locate the dwelling. The dwelling is designed to be packaged within a rectangular container with one of the anchoring loops coinciding with a cutout in the container, which loop, when drawn through the cutout, serves conveniently as a carrying handle.