Abstract: A system is provided for rapidly determining the flatness of a rolled sheet of aluminum which comprises placing a ruled lightweight flat bar across the sheet with portions of the bar in contact with adjacent high points on said sheet and measuring the distance between the high points. The height is then measured by inserting, between the bar and the lowest point on the sheet between the high points, a gauge having continuous measuring means comprising a conically shaped device tapering to a point. The gauge is inserted until both surfaces are in contact with the conical device. The thickness of the conical gauge is then measured at the point of contact to determine the distance between the surfaces.

Abstract: An apparatus for determining the charging profile on the charging surface of a shaft furnace is presented. The apparatus consists of a plurality of level probes, each probe including a weight which is suspended vertically above the charging surface on the first end of a cable which projects from a supporting arm. The second end of each of these cables, in turn, is connected outside the furnace to respective winding drums, each drum being controlled by a driving device which raises or lowers the probe connected to the drum. This invention also consists of a monitoring device for measuring the unwinding of the cable from the drum and the descent of the probe onto the charging surface as well as a method of replacing an individual probe and its cable from outside the shaft furnace.

Abstract: Such a drying plant has drying surfaces (4) superposed in a chamber (1) and extending over the depth of the chamber (1). The drying surfaces (4) are provided with heating plates (3). The upper run of an endless conveyor belt running on rollers (6,7) is guided over the drying surfaces. The material to be dried is applied by a dosing device via a pipe (9) having branches (10) to the moving belts (5) uniformly over the width until the entire drying surface (4) is covered. The belts (5) are then stopped and the dosing operation is completed. The drying operation is then carried out on the drying surface (4) while the belts (5) are stationary. The belts (5) are then moved in the opposite direction, so that the dried material is thrown off via the rollers (7) and discharged through a discharge opening (13) and a charging valve (14). Thus, the drying operation is carried out under optimum conditions known for drying cabinets.

Abstract: A ring-gap nozzle for distributing a fluid medium over a plate, for instance over a bottom plate in a fluidized bed dryer, having two dish-shaped pressed parts suiting to each other complementarily being assembled in facing relationship and nested into each other and forming a ring gap through which the medium, deflected by 90.degree. or more, flows to the bottom plate, preventing both the settling of the product to be treated in the fluidized bed dryer on the plate as well as the reflux of the product backwardly into the nozzle when the flow of medium is cut off. This type of nozzle is simple to manufacture and does close the passage without any complicated manipulation automatically.

Abstract: This invention relates to a safety shoe of the type having an upper with a box toe cap in the toe portion thereof and an outer sole of relatively yielding, resilient and flexible material secured to the upper and having a supporting plate of relatively rigid material embedded in and surrounded by the material of the outer sole and having a configuration similar to the generally U-shaped configuration of the lower edge of the safety box toe and being disposed beneath said lower edge in registry therewith so as to impart additional support thereto when a blow or force is applied to the toe cap.In a preferred embodiment of the invention the supporting plate is formed of a relatively rigid, hard, polymeric material and has a plurality of apertures formed therein into which the material of the outer sole extends to help anchor the supporting plate in position.

Abstract: Footwear including an upper and a sole with a plurality of cleats extending from the sole arranged in groupings of cleats adapting the footwear to field sports. A control device extends upwardly of the sole around the heel, a pair of spines extend along the sole between cleats of a grouping of cleats within the region of the ball and heel of the foot, and a flex area is provided in the sole in the general off-center alignment of the heads of the metatarsal bones.

Abstract: A fastening and locking device structure, particularly for ski boots, comprises a hollow frusto-conical element enclosing the ski boot shell at a middle region thereof. The frusto-conical element extends at a top region into a tongue and laterally to the ski boot into two wings encircling the ski boot middle region and joining together in a groove provided between the sole and the heel region of the ski boot. The frusto-conical element is further fixedly connected with two lugs extending towards the boot heel, whereat they present a tension lever device for fastening them together and tightening the boot flaps.

Abstract: A foot retaining device in a ski boot comprises a pressure element arranged within an outer shell of the ski boot at the neck area of the user's foot, and a cable embracing the pressure element and having one end fixed to the outer shell and another end wound on a winding reel operable by a knob accessible from the outside of the ski boot. The reel and knob are arranged at a rear portion of the ski boot. Rotation of the winding reel causes the pressure element to increase or decrease pressure on the user's foot. Ratchet gears are provided for retaining the winding reel and cable in position in use.

Abstract: In-place underwater dredging apparatus for dredging solid material from an underwater area by pumping a mixture of water and solids from the area and discharging the mixture at a remote location to thereby clear and deepen the area. The apparatus includes an upstanding pipe having at its upper end a hydraulically driven pump with a discharge conduit for conducting said mixture to a remote location, auger screws extending generally laterally outwardly from the lower end of said upstanding pipe and delivering material at a selected rate to the upstanding pipe, and a variable speed hydraulic motor connected with and for rotating said auger screws. Thus the percentage of solids to water which is delivered is variable depending on variable conditions and circumstances. The pump draws the mixture from the auger screws and through the upstanding pipe and discharges it at a remote location.

Abstract: A plow blade for snow plowing or other plowing applications is constructed prepared from a transparent material to reduce plow weight and to permit the normal lighting of the plow vehicle to be seen through the plow blade, thus eliminating the need for auxiliary lighting. The plow blade is especially suitable for use with small plows, such as those designed for use with small four-wheel drive passenger cars. In the preferred embodiment, a transparent, replaceable plastic plow face member is supported by a light weight frame.

Abstract: An ironing board supported by collapsible legs to which a box-shaped body can be connected either fixedly or in a removable manner. This body is provided with a specific housing suitable to accommodate an iron interconnected to a steam boiler by a fluid passage duct. The steam boiler may be formed directly in one of the collapsible legs supporting the board or carried, in a substantially vertical position, by one of said legs. Also, the steam boiler may be incorporated in the box-shaped body.

Abstract: A container for storing and securing drawings. The container consists of an elongated tubular member that has a releasable cover at one end. The cover, which may be lockingly secured to the tubular member, contains a downwardly depending post upon which are secured one or more drawings that describe a specific piece of equipment to which the container is attached or located in close proximity. The drawings may be wrapped around the post and received within the tubular member which is enclosed by the cover.

Abstract: An improved identification locket having magnifying lens, a case, a frame for retaining a transparent transcript and means for opening and closing the case, also includes a support for maintaining the lens at a fixed distance from the frame and for preventing movement between the cover and frame in the open position. The support includes a first and second slotted arm attached to a first and second slide pin; each arm having a keeper for lockingly retaining the slide pin when the locket is in the open position.

Abstract: In a display or the like device, a flexible sheet is supported in tension within a frame by means of tensioning devices secured to the frame. Each tensioning device includes a movable peg which is engaged in an aperture in the sheet. Each peg can be placed in a position nearer the middle of the space within the frame in which it is retained, or displaced away from the middle of this space, to tension the sheet, and when so displaced, the peg is urged resiliently away from the middle of this space by a spring within the respective tensioning device, to hold the sheet in tension. The tensioning devices thus constitute a simple and compact means of providing for ready interchangability of various display areas in the frame.

Abstract: A street sign adaptor unit and a street sign assembly for allowing use of standard V-notch perforate or cylindrical metal fence or highway sign posts to be used with standard sign panels for intersecting streets in which the adaptor unit has a varied cross-section to accommodate attachment and fixation with standard fasteners and without expensive conversion apparatus to both types of post and to sign panels.

Abstract: A telescopic sight mount having a base portion, cap means flexibly connected together at a joint above the center line of the sight mount and connectable to the base portion and tightening means for connecting the cap means to the base portion at a point below the center line of the sight mount is provided.

Abstract: A self loading fire arm having manually releasable means for holding a box magazine in a well in the fire arm frame which is operable by either hand on either side of the fire arm. The releasable means comprises an aperture (T1) in the front wall of the magazine which is engaged by the nose (VV1) of a catch (VV) pivotable in a slot in the wall of the well from a central position in which the catch nose engages the aperture (T1) to either of two extreme positions in which the nose is withdrawn from the aperture, pivoting of the catch being effected from either side by means of a double plunger (UU).

Abstract: A barrel locking mechanism for a break-open-action gun having a barrel and a mechanical section rotatably engaged with each other by a hinge-pin. It has a lug secured to the barrel and having a delining surface. While a stationary receiver is integrally mounted on the mechanical section. On the top of it, a movable receiver having a delining surface corresponding to that of the lug is vertically movably mounted through a spring. When the gun is locked, the lug moves downwards depressing the movable receiver against the spring. As a result, intimate contact of the corresponding surfaces is obtained in order to receive the load when the gun is discharged.

Abstract: An apparatus for the rapid loading of ammunition into a magazine including a housing having open end to be received by the magazine. The housing has a receiving port into which the ammunition is disposed. There is preferably provided in combination with the apparatus a support pad for a plurality of rounds of ammunition with the support pad and ammunition being loaded into the receiving port of the housing. The housing has a means for limiting the position of the ammunition, typically a wall of the housing adapted to align the ammunition with the magazine. Means are provided supported at the housing remote from the open end thereof for contacting and driving the ammunition through the open end of the housing into the magazine.

Abstract: A fishing device, used by fishermen for gaffing a fish, which has two hooks at one end of a shaft at an angle to positively engage and retrieve fish; and a handle at the other end of the shaft with a strap to wrap around wrist to secure gaff to fisherman to avoid loss of gaff by pull of fish or slipping of gaff from hand.

Abstract: Collapsible net apparatus including a handle; a T-member having laterally spaced openings; a slide member slidably engaging the handle; a pair of arms pivotally connected to the slide member and slidably received within the openings of the T-member, the arms divergently extended or convergently retracted upon movement of the slide member; a latch member for holding the arms in an extended position; a net support extending between the free end of the arms; and a net stranded about the arms, support member, and connected to the T-member. Hook members at the free end of each arm gather the net strands during collapse of the device to maintain proper placement for the operational mode, and a hook located at the end of the handle, engageable with the net, restrains and holds the net in place during the collapsed storage mode.

Abstract: A fish lure of the type having a plate-like, V-shaped cross-section or configuration, formed from a drop-shaped plate. The pointed leading end of the lure is provided with means for securement of the lure to a fishing line. The trailing, rounded, relatively wide end portion comprises an outwardly bent small spoiler. The advance in the art is that the lure combines the ease of manufacture due to a simple exterior shape with the capability of movement, when moved through the water, similar to the natural movement of a struggling or lame prey fish.

Abstract: A cone-shaped fishing bobber features a fixed line retention member and a releasable leader line retention member. A movable plunger in the central bore of the bobber retains the fishing line by a slot and a movable ring at the plunger top. The releasable leader line retention member comprises a movable rigid wire set in the plunger bottom so as to bridge a recessed spool area at the cone base. Leader line is wound on the spool and held in place by the rigid wire during casting and released by the plunger and wire dropping down when the bobber hits the water. In the water the cone shape gives indication of the direction of current flow. The retention of the fishing line at the narrow end of the cone causes the cone to flip base-side-up when the weight of a fish attaches to the line. Ballast may be provided within the base of the cone body. The retainer ring and the movable rigid wire present no protruding parts to cause entanglement of the fishing line.

Abstract: An outrigger or downrigger fishing clip comprises a U-shaped arm pivoted to a body to define a cavity between the arm and body in which is positioned a roller journaled in the arm so that a fishing line extending through the clip between the arm and body rides friction-free over the roller. Shrouds extend from the body over the roller ends to prevent a line from slipping over the ends of the roller and getting caught between the roller ends and the pivoted arm. A latch link spans the arm and body, extending through outwardly opening mating recesses in the arm and body and has a cam element engaging the free end of the roller of the shaft. The latch link is resiliently pressed against the body within the recess to provide a selectively adjustable force that resists pivotal release of the arm and of the tensioned fishing line entrained over the roller.

Abstract: A light weight leader used for fishing is switched automatically to a heavy line when a large fish is hooked. Thus a connector link of the length of the leader has a heavy fishing line attached to one end and a detent mechanism for receiving the hook at the other to thereby replace the leader. A friction pad holding the heavy line in a loop for extending the leader from the other end of the connector permits the line to be cast and used for small fish with the light leader but gives way to the tension when a big fish is hooked and lets the hook be detented into the connector element for landing with the heavy fishing line.

Abstract: An outrigger or downrigger fishing clip comprises a U-shaped arm pivoted to a body to define a cavity between the arm and body in which is positioned a roller journaled in the arm so that a fishing line extending through the clip between the arm and body rides friction-free over the roller. Shrouds extend from the body over the roller ends to prevent a line from slipping over the ends of the roller and getting caught between the roller ends and the pivoted arm. A latch link spans the arm and body, extending through outwardly opening mating recesses in the arm and body and has a cam element engaging the free end of the roller of the shaft. The latch link is resiliently pressed against the body within the recess to provide a selectively adjustable force that resists pivotal release of the arm and of the tensioned fishing line entrained over the roller.

Abstract: A novel mouse trap is provided herein. The trap includes a base, a sensing platform having a forward end and a rearward extension and pivotable as a first class lever about an intermediate fulcrum. A spring loaded garrot wire is movable between a spring-load position extending rearwardly of the base and a spring-released, tripped position extending forwardly of the base, holding means for holding the garrot wire in its spring-loaded position and trip bar means for releasing the holding means to allow the garrot wire to move to the spring-released, tripped position. The essence of the invention resides in the provision of a combined holding member and trip bar, of a particular specified shape and having one essential element extending rearwardly from the sensing platform and lying beneath the garrot wire when the garrot wire is in the spring-loaded position. The linkage is pivotal about a fulcrum, and is held to the garrot wire by the holding member.

Abstract: A system for hydroponically growing plants in a vertical array includes a vertical cylindrical column adapted to contain an inert support material, the column including top and bottom openings and a plurality of side apertures. A nutrient reservoir is provided for positioning above the column and adapted to contain a nutrient solution. The introduction of nutrient solution into the column is controlled by an adjustable valve supported above the top opening of the column for gravity feed of nutrient solution into the column. The valve is positioned to permit visual inspection of the rate of introduction of nutrient solution through the valve and into the column. A conduit connects the valve to the nutrient reservoir.

Abstract: A device, which consumes little power while producing an automatic, periodic, partial rotation of a hanging planter, having a low-power consumption electronic timing circuit, an electric motor, a power supply and electronic and mechanical means to start the motor upon signal from the timing circuit, rotate the planter and stop it after sufficient rotation has occurred. The device is designed so that it can operate for many months using a small power supply such as a flashlight battery and to be as inconspicuous and aesthetically unobstrusive as possible.

Abstract: A process for growing nursery stock (e.g. trees, shrubs, etc.) involving the specific improvement of confining root propagation to a nonwoven porous polymeric fabric bag such that growth through the bag is severely constricted at the fabric, producing a girdling effect and root branching within the bag. Such a process leads to a tightly packed, highly root branched soil ball even in loose sandy loam that is easily removed from the field, readily transported and effective in re-establishing the tree upon transplanting even during the hot summer months.

Abstract: A vehicle barricade has two concrete walls contiguously disposed along either side of a roadway for defining a checkpoint. A shaft is pivotally secured to the roadway and extends transversely between the concrete walls. A barrier plate is pivotal with the shaft between a first horizontal position and a second angularly disposed position adapted for preventing vehicle passage through the checkpoint by engagement of the barrier plate with the vehicle. A shaft retaining system is provided for preventing removal of the shaft and the barrier plate therewith from the roadway surface.

Abstract: Apparatus for opening aligned sliding leaves of furniture, wherein the or each sliding leaf comprises, at its upper part, an upper track for receiving a first roller having a vertical axis and connected to a movable part of a slide guide fixedly secured to or integral with the furniture. The movable part is movable in a direction substantially perpendicular to the plane of the leaf and is provided with an engagement member, such as a pin, coupled with a first pulley connected, by means of an inextensible, flexible element, to a second pulley in a lower part of the furniture. The second pulley is supported by a horizontal shaft extending across the width of the door leaf and is provided at its ends with a pair of arms, acting upon lateral trolleys supported by pairs of rollers sliding in guides rigidly secured to the furniture. The trolleys carry a U-section member in which run horizontal-axis second rollers and vertical-axis third rollers, rigidly connected to the door leaf by means of a lower support member.

Abstract: A device for operating a swiveling or mobile body element intended particularly to seal an access opening to a control or observation post by a cover that can be moved angularly around a pivot pin fastened to the body by means of an operating and locking handle. The operating handle includes a gripping element and a control element. A hinge and connecting pin are provided between these elements and an interlocking mechanism between the control element and the pivot pin.

Abstract: A sliding door construction which includes trim disposed on side edges of the door and the trim on the side edges having an upwardly extending tab provided with a diagonal slot at its uppermost extremity having a roller carried therein adapted to move along the length of the diagonal slot, the roller constrained to ride in an overhead trackway and freely move along the diagonal slot to provide and accommodate variations in dimension between upper and lower frame members. Various channel members are disposed at a lowermost horizontal extremity to accommodate different types of design considerations.

Abstract: Elliptical error in the generating of toric lenses is substantially eliminated, thereby reducing the time and cost of the production of such lenses. A cup-shaped cutter wheel is swept to cut the lens in a plurality of cuts, suitably three cuts. During each cut the inclination of the cutter wheel and its displacement from the lens in a direction along the optical axis of the lens are changed. Each subsequent cut reduces the elliptical error left after the preceding cut. A computer controller, including a memory storing a table of values of angular orientations and displacements of the cutter wheel with respect to the lens for each of a series of cross curve powers (D.sub.C) which is desired to accompany each of a series of base curve powers (D.sub.B), is used to control the positioning of the cutter unit mounted on the headstock and the tailstock on which the lens is mounted for cutting so as to cut both convex (plus) and concave (minus) toric lenses with minimal elliptical error in the cross curve thereof.

Abstract: Apparatus for grinding twist drills comprises a drive shaft and a grinding wheel, which is coupled to said shaft and is mounted thereon to be axially movable relative to the shaft and is spring-loaded toward a drill-guiding structure facing the grinding surface of the grinding wheel. The drill-guiding structure comprises guiding passages for guiding drills differing in diameter against the grinding surface and in association with each guiding passage comprises at least one guide lug for extending into a flute of the twist drill extending through the associated guiding passage, and a drill stop for limiting the advance of the twist drill in the guiding passage against the elastically yielding grinding wheel. To said drill-guiding structure at least one abutment is connected which is engageable by the grinding wheel and has a higher hardness than the grinding wheel.

Abstract: The apparatus for grinding twist drills comprises a shaft and a grinding wheel which has a grinding surface and is rigidly secured to the shaft. The apparatus comprises also a drill-guiding body, which faces the grinding surface and is axially spaced from it and axially immovable relative to the grinding surface. The drill-guiding body is formed with a plurality of guiding passages for guiding twist drills differing in diameter toward the grinding surface. At least one guide lug is aligned with each guiding passage of the drill-guiding body and adapted to extend into a flute of a twist drill extending through the associated guiding passage. All guide lugs are mounted on a guide lug carrier, which is mounted to be axially movable between the drill-guiding body and the grinding surface and which is biased toward the grinding surface by a spring.

Abstract: Apparatus is disclosed for mounting a portable power drill with a rotatable abrasive disk for abrading the surface of a workpiece. The apparatus includes a base, a drill holding assembly, a workpiece support table, and a liquid reservoir with bristles for wetting the surface of the disk. The base includes at least one support column having a lug. The support table includes at least one base engaging wall. The base engaging wall has an arcuate channel for receiving the lug. The base engaging wall defines an opening to the channel for accommodating entry of the lug into the channel.

Abstract: A self correcting belt tracking mechanism is disclosed for a portable belt sander having an idler belt roller arranged with its axis movable into and out of co-planer relation with that of a driven belt roller, and springs acting in opposition to each other to resist such idler roller axis movement.

Abstract: A protective-hood fastening for portable angled grinders is disclosed. The protective hood is attached by a tensioning strap and screw to, and can be released from, a spindle collar on the gear housing. A securing element prevents the hood from slipping off the housing and into the grinding disk.

Abstract: A dwelling in which the utilities are built around a small core room with a bath arranged to either side of the core room and a kitchen arranged adjacent one bath so that all sewer lines may extend from the various facilities to a main single sewer line in the core. The core also provides for a water heater, air conditioning equipment, as well as water lines to the various facilities.

Abstract: A protective cover for temporarily enclosing a building or other structure during construction, includes a plurality of plastic or canvas panels which are mounted on cables connected to the structure, in parallel spaced apart vertical rows, by connectors including a rod for insertion through grommets in the edges of the panels, a lever rotatably mounted on one end of the rod for rotation around an axis perpendicular to the longitudinal axis of the rod, so that the rod can be inserted through the grommet and rotated to a locked position, and a C-shaped cable clamp on the other end of the rod, the cable clamp including a web mounting on and projecting perpendicular to the rod on each side thereof, an arm on each end of the web extending towards the other end of the rod and a slot in one side of each arm, the slot being inclined towards the other end of the rod and being sufficiently deep that a cable can be inserted through the slots and retained therein by the rod.

Abstract: A mast-type, three-dimensional framework structure of rectangular cross sion with four diagonally-braced frames which form the sides of the framework structure and all of which are manufactured from tubes and tubular joints made from fibre-reinforced plastics. The diagonally-braced frames are so interconnected by means of hinged connections on their longitudinal members that they can be folded flat in such a way that two adjacent diagonally-braced frames lie in each case on top of the two opposite diagonally-braced frames. Between the longitudinal members of two opposite corners of the framework structure, fixed-length cables are fitted which, when the structure is unfolded, form a stay in one of the diagonals. Between the outer opposite corners, which are on the outside when the structure is folded, there are low-friction cable deflectors for a tensioning cable.

Abstract: A roof tile is provided with a pair of batten lugs and a pair of stacking lugs protruding from the bottom side thereof. The batten lugs are positioned very close to and taper to the edge at the head end of the tile so that the thickness of the tail end of the tile may be relatively thin and may be equal to the thickness at the edge of the tile head end. The stacking lugs are positioned longitudinally away from the tail end of the tile so as not to interfere with tile overlapping. The thickness of the tile from the front surface thereof to the tip of each batten lug is substantially equal to the thickness of the tile from the front surface thereof to the tip of each stacking lug such that the tile may be stacked with other similar tiles without need to rotate every other tile by 180.degree..

Abstract: An insulated panel is provided with an embedded locking pin that is mounted to a plate placed flushly against a side of the insulated panel. An adjacent panel may be securely fastened by rotating a hook down into the insulation of the other panel and into locking engagement with the embedded locking pin.

Abstract: An acoustic fabric-mounting system includes a fabric stretched across a wooden frame of an acoustic panel. Some frame members are fixed to a wall, while other frame members are connected to one or more brackets which allow them to move relative to the fixed members along the wall. A tensioning bracket mounted beneath the panel exerts an expansion force against the movable frame member, tending to move it translationally apart from the fixed frame member, so that the fabric is stretched taut. The tensioning bracket is spring-loaded and adjustable.

Abstract: A plate-like ground or earth anchor has a scoop-like channel formed in the leading end thereof, and an open topped socket formed in the trailing end thereof, laterally extending wings along the length thereof, and a raised cable anchor ridge directing dirt from the channel so that a cable or rod secured therein will be free to swing when it is tensioned to pull the plate from an upright driving position to a transverse horizontal locking position. The leading ends of the wings are beveled toward the channel to cooperate therewith for forming a chisel-like leading edge on the plate. The open top of the socket is inclined to provide an apex beyond the wings and a cutting edge merging into the rear ends of the wings which are also beveled to provide cutting edges. The plate is driven upright into the ground by an impact rod loosely fitted in the socket and as it cuts into the ground, it leaves a channel or groove for a cable or tension rod.

Abstract: An improved building support system for minimizing the effects of strong seismic shocks to building structures transmitted through the earth to the foundation of the building structure, by laterally isolating the building base support structures from earth movements, comprising a first set of sliding bearing plates operably coupled to the base of the support columns of the building structure, a second set of sliding bearing plates fixedly mounted to the foundation and disposed in complementary sliding relationship to the first set of sliding bearing plates, a plurality of flexural members each fixedly coupled intermediately thereof to the support columns, and each flexural member being pivotally anchored at the ends thereof to a mounting post, each mounting post being moveably disposed along the longitudinal axis of the flexural members to which the mounting posts are secured and having a pair of apertures therein with bolts therethrough whereby said improved building support system provides a means for permi

Abstract: A construction element for foundation drainage has an integral, flexible, and substantially water-impervious panel lying generally in a plane and formed with respective arrays of inner and outer bumps to opposite sides of the plane. The outer bumps form outwardly open outer flow channels on the outer face. Normally the panel is applied to a vertical foundation wall with the inner bumps bearing against the wall and the outer passages vertical and opening outward away from the wall. The inner bumps and outer bumps are offset to one another in the plane in two perpendicular directions. Thus the channels communicate also in these two directions and the element can be rolled up. A water-pervious and rigid filter sheet overlies the outer bumps, is spaced outward from the plane, and outwardly closes the channels so that water can filter through the sheet and flow down the channels.

Abstract: A dock seal construction for a building having a door opening and side wall portions located to the sides of the door opening, the dock seal including a pair of elongated pad members secured on the side wall portions, a resilient flexible core in each of the pad members, a casing surrounding a substantial portion of the peripheries of the pad members, with the pad members each having an inclined outer side spaced from its respective side wall portion which extends at a slant toward the door opening so as to provide a relatively small amount of flexible core which is compressed by the rear of a truck.