Abstract: A frame for a self-ventilated greenhouse, a self-ventilated greenhouse, and a method for controlling the air pressure between the layers of a double-layer roof for a greenhouse. The frame for the greenhouse comprises first and second parallel rows of upright sideposts; first and second sets of elongated, arcuate frame members; a plurality of cross-members hingedly connecting the sets of frame members; and means for separating and reuniting the sets of frame members. A roof for the greenhouse is provided by disposing first and second translucent sheets above the first and second sets of arcuate frame members, thereby conveting the frame into a greenhouse. The method comprises sealing the ends of a pair of sheets along their edges to form an inflatable pouch, disposing the sealed sheets above a frame to form a roof for a greenhouse, inflating the pouch, and controlling the pressure within the pouch with a back-pressure control valve.

Abstract: A culturing apparatus including a culturing tank for culturing cells, organs or tissue strips of a plant, internally therein, and a cutting device for cutting cultured plant bodies arranged within the culturing tank, wherein a push-out means for urging the plant bodies against the cutting device is further provided or the cutting means is made movable so as to be urged against the plant bodies.

Abstract: A spray shield assembly adapted to be moved over row crops to temporarily enclose the crops when liquids are sprayed onto them or the ground around them, which assembly includes a liquid distribution system for distributing liquid to outlet nozzles, and a polymeric shield defining a channel opening through one side and front and rear ends of the shield for receiving the crops. The shield has a converging leading portion for directing portions of plants into the channel, and a semi cylindrical portion in which the nozzles are mounted, with two of the nozzles in one of an array of openings in opposite sides of the shield, which arrays of openings allow adjusting the location of the nozzles to accommodate the portion of the plants desired to be sprayed.

Abstract: A ventilated greenhouse comprising an enclosure cooperatively formed by a first and second substantially parallel vertical side wall disposed in spaced relationship relative to each other by a pair of substantially parallel vertical end walls and a roof including a first and second roof section wherein opposite ends of the first roof section are disposed in overlapping spaced relationship relative to the upper portion of the second roof section and the upper portion of the first substantially vertical side wall to cooperatively form a ridge vent and side vent respectively and a first and second sealing element each movable between a first and second position disposed in operative relationship relative to the ridge vent and side vent respectively to permit air circulation through the ventilated greenhouse when the first and second sealing elements are in the first position and to seal the ridge vent and side vent respectively when the first and second sealing elements are in the second position.

Abstract: Two pipe-construction houses of a shed-roofed type, facing each other at their ridge sides with a gap provided between the ridges, are coupled with girders to make an integrated construction. The sides are covered with rollable ventilative sheets, and its roof is made of a soft plastic film span on a pipe-construction roof frame above a hard plastic sheet spread along the central part in the longitudinal direction of the roof. Cultivation beds of rust-prevention-coated thin steel sheet are hung on bed bearing fittings of a pipe structure. Nutrient solution is fed by an air lift pump under control by electric conductance thereof.

Abstract: A plant flat handling system for handling floatable plant flats employs a horizontally extending main channel which can be flooded from either a water tank or a nutrient containing tank with a plurality of branch channels extending outwardly from the main channel. Gate valve means between the branch channel and the main channel can be opened to permit the main channel to fill the branch channel or to drain the branch channel when the main channel is drained. Plural wires extend along the length of the branch channels and support floating plant flats when the branch channels are drained. Periodic flooding and draining of the branch channels is effected until plants in the flats have matured and can be harvested. Harvesting is effected by maintaining light pressure against the outermost plant flats in the branch channel to urge the body of plant flats toward a main work area overlying the main channel. A power conveyor extends downwardly into the branch channel and lifts the flats therefrom for harvesting.

Abstract: A water sprinkling system for greenhouse comprises two horizontal rails and a carriage movably mounted to the rails. A fluid outlet disposed at a substantially midway point along the rails is connected to the carriage by a fluid transfer hose for guiding fluid to the carriage from the fluid outlet. The hose has a first end portion extending from the fluid outlet along the first rail, a second end portion extending to the carriage along the second rail, and a middle portion connecting the end portions to one another. Support elements, preferably in the form of hook members, are spaced from one another along the first rail for supporting the first end portion of the hose, while a plurality of roller members are spaced from one another along the second rail for rollably supporting the second end portion of the hose. A hosecar is movably mounted to the rails for carrying the middle portion of the hose.

Abstract: A vent assembly which can be mounted to plant nursery buildings of the type which include a plurality of arcuate roof frame members covered by a fabric material, such as a plastic film, the vent assembly having at least one pair of sawtooth profiled frames which may be bolted or otherwise connected to the building roof frame members to be upstanding therefrom. A pair of members extending longitudinally of the building are connected to upper and lower parts of the vertical portions of the sawtooth frames to define a vent opening which may be opened and closed by means of a rollerblind.

Abstract: In order to provide versatile use for a surface that is provided with a covering of grass or the like, a plurality of bases are inserted in the subsoil of the surface below the grass covering for the support of a supporting structure that is provided with a floor covering that can be walked or driven upon. When the grass covering is used, the bases are covered by inserts that are adapted to be placed in the grass covering. When the surface is to be used for a different purpose, the supporting structure is supported on the bases in such a way as to be spaced from the grass covering. Illuminating means that are mounted on the supporting structure and that produce effects for photo-biological processes are provided for irradiating the grass covering, so that despite the covering, growth is not inhibited. Thus, the surface has a versatile use without having to worry about damage to the grass covering. Conversion is effected in a short period of time in an economical manner.

Abstract: The present invention entails a plant clipping system for clipping the top portion of growing plants. A boom structure is supported over an area of underlying plants. A plant clipping device is movably mounted on the boom structure and depends downwardly therefrom. In operation, the plant clipping device is fixed in a certain position on the boom structure and the boom is moved over the underlying plants and during this process the plant clipping device clips the top portion of the plants. The plant clipping device can be laterally adjusted on the boom structure such that it can be moved from one location to another location on the boom structure. By repeatedly shifting the position of the plant clipping device on the boom structure after each boom traverse it is seen that a relatively large area of plants underlying the boom structure can be clipped.

Abstract: The device comprises a hermetically sealed chamber (1) whose interior space accommodates a perforated band (3) held to a drive drum (2). Part of the chamber (1) is made as a flexible tubing (4) one end of which is connected to the free end of the perforated band (3), and the other end is turned inside out and held perepherally in the chamber (1) to form a hermetically sealed space (11) along therewith. The interior space (11) of the chamber (1) is connected to the working agent and nutrient medium feeding systems (8,9).

Abstract: The invention relates to polymer sheets or films for use in greenhouses. The polymer sheets or films contain components which absorb or reflect in the near I.R. (NIR) i.e. in the 0.7 to 2.0.mu. region, and which transmit at least 75 percent in the photosynthesis active radiation (PAR) region, which is essentially the 0.4.mu. to 0.7.mu. region of the solar spectrum. The compositions of the invention contain UV radiation stabilizers. The NIR absorbers and reflectors in the films of the invention are certain specific oxides or metals in a very fine particle size, in the submicron or micron range.

Abstract: Pesticide spraying apparatus for spraying crops in the field, grapes, and seedling trees. The spraying apparatus includes a wheeled arcuate canopy open at the bottom providing a rounded arcuate interior wall and a spacing at the open bottom related to the width of one or more conventional rows of crops of the like. The canopy has an arcuate peripheral flange at each end and a downwardly extending skirt or air curtain along the bottom of each side of the canopy to confine the pesticides to the open bottom area of the spraying apparatus. One or more blowers and pesticide assembly is provided for blowing droplets along the interior inner wall of the canopy at spaced locations. An air door or curtain is also created at each open end of the canopy and droplets of pesticide are thus blown into contact with the plants to treat the same under the canopy.

Abstract: For applying herbicides in fields of row crops an applicator in which the herbicide can be selectively applied to a localized wick in the row in which the weeds are present. The wick is also selectively supplied with herbicide dependent on whether or not weeds are present.

Abstract: An apparatus for applying a liquid chemical to plants includes an elongate hollow body which contains a liquid chemical. In use, the hollow body is transported through the plants in a direction transverse to the length of the elongate body. The elongate body includes a row of bottom holes and a row of side holes positioned along the leading side of the elongate body. A canvas cover is tightly wrapped around the elongate body in a double layer and the peripheral side edges of the canvas are sealed. The elongate body is filled with the chemical and an air valve is adjusted to bleed air into the interior of the elongate body. The elongate body is then moved through the field and, by adjusting the position of the elongate body above the ground, the chemical which has seeped into the canvas is wiped onto the plants. In a preferred embodiment, the elongate body is circular and made of a plastic material.

Abstract: A bracket assembly for mounting on any size tool bar or similar supporting structure oriented transversely at the rear of a tractor and supporting an agricultural implement such as a spray rig assembly which includes a plant leaf lifter and protector supported in depending, trailing relation to the bracket assembly by a pair of pivotal, parallel links having a ground engaging supporting shoe or skid at the lower end which supports a plant leaf lifter and protector associated with spray nozzles so that liquid discharged from the nozzles will not directly engage the plant stems or foliage. The bracket assembly includes a variation that enables the tool bar to be supported from the draft mechanism of the tractor including a structure accommodating the draft pins on the lower links or arms of a three point hitch mounted on the tractor.

Abstract: A method is described for spraying toxic chemicals onto agricultural plants that produces only a small amount of contained drift and then removes this drift from the air polluted.The environment is not badly damaged, less toxic chemical is used, the probability that a user will injure anyone with toxic spray drift is reduced and spraying work is made more tolerable.

Abstract: A system for controlling environmental conditions including irrigation or misting in greenhouses having a plurality of crop beds within one greenhouse enclosure arranged into a plurality of sense zones and a plurality of control zones comprises a plurality of sensors stationed over crop beds within each sense zone comprising an aspirated enclosure and means therein for generating analog electrical signals indicative of web bulb and dry bulb temperatures and also means for generating an analog electrical signal indicative of incident light over the bed of a microcomputer.

Abstract: A system for controlling environmental conditions including irrigation or misting in greenhouses having a plurality of crop beds within one greenhouse enclosure. Aspirated enclosures have associated temperature sensors for measuring dry bulb temperature and humidity, the temperature of a surface over the bed and also a sensor of incident light over the bed. A computer is programmed with a task for inputting temperature data and for calculating the vapor pressure deficit over each bed and for inputting incident light data for measuring a parameter indicative of physiological crop age. A task establishes times for supply of water based upon the gathered data.

Abstract: A cold frame comprising a housing formed of one or more housing sections with opposed ends walls. The sections include channel-defining end edges interlockable with the end edges of adjacent sections and with the end walls. The sections at the joinders therebetween, forming outwardly directed channels for water exclusion. The sections include, along the opposed side walls thereof, elongate vents with connector bars between the aligned vents of adjacent sections for a gang operation of all of the vents along a side of the cold frame. Each section and end wall incldues positioning blocks mounted thereon for the reception of horizontal alignment pins therethrough and vertical anchoring stakes.

Abstract: Apparatus for stimulating plant growth under controlled conditions comprises a housing having a lower portion, an upper portion, a hollow interior in which plants are grown and an exterior. Fluorescent lamps mounted within the interior stimulate growth of the plants. The housing is formed with vacuum-metalized walls or panels which, when illuminated by the lamps, reflect a major proportion of light into the interior. The housing is further formed with a lower vent and an upper vent to facilitate circulation of air through the interior. The lower vent substantially surrounds the lower portion of the housing and the upper vent substantially surrounds the upper portion of the housing to optimize the flow of air. The lower and upper vents are formed and located with respect to the lamps and walls so as substantially to block passage of light through the vents from the interior to the exterior.

Abstract: This invention is an irrigation system which is mounted on parallel tracks and spans the distance therebetween. The main frame is of the truss type and includes a drive means on each end thereof. Also, a tensioning means is provided to assure perpendicular travel of the irrigation system relative to the support track to prevent any twisting tendency. The system can be operated either automatically or manually, and when on automatic, it will cycle back and forth over the designated area.

Abstract: A device for determining the direction of a fluid spray pattern issuing from a fluid nozzle prior to flowing through the nozzle includes a body in the form of a template or a jig releasably attachable in a predetermined orientation to the nozzle tip. The body includes a pair of angularly related adjustable arms having axes which intersect the nozzle aperture and which extend such that the central axis of the nozzle bisects the angle between the arms. By applying the device to the nozzle tip in predetermined orientation, the arms define the lateral extremities of the spray pattern.

Abstract: The invention provides a sheltering structure essentially constructed of a framework and a cover of sheet material. The structure includes a plurality of arched bars arranged in a plurality of rows, wherein at least most of the bars are supported at their end portions at least indirectly by the ground, wire or rod-like elements extending between at least some of the arched bars disposed along a row, strips of sheet material, each strip extending in the direction of the planes of, and supported by, the arched bars and the elements, and means for securing the strips above the bars, the means extending across the strips along troughs formed between adjoining rows of arched bars. A method of assembling a sheltering structure is also described.

Abstract: An apparatus or greenhouse is shown, which comprises both a treatment area and growing areas. Normally the plants are kept in the growing areas. When the plants have to be treated they are conveyed to the treatment area, in which area treatment equipment (like sprinklers, elements for applying pesticides) is fitted. Also transport means for supplying and removing plants extend only into the treatment area.According to a preferred embodiment the treatment area is longitudinal and the growing area's are located on both sides of said treatment area. The conveying means are tables moveable along paths extending perpendicular to the length of the treatment area. Two tables are moveable along each paths, an upper table resting on an outer pair of rails and a lower table resting on an inner pair of rails. The containers with the plants therein are placed on the tables.

Abstract: A novel greenhouse or storage structure of simplistic design permitting controlled insulation and solar exposure.

Abstract: A drip stop spacer spaces a roof or wall covering such as sheet plastic from purlins or other frame members of a greenhouse. An elongate elastic cylindrical helix is formed of a length of helical chord of flexible material with chord depth dimension in the radial direction of the helix selected to achieve a desired spacing between a covering and frame members. The helix diameter is sufficient to place the helix in turns around the frame members with lead or pitch between turns of the helix selected to prevent sagging contact of the covering against frame members. The spacer elements can be installed by twisting or winding around the purlins without requiring removal of frame members. Condensation flowing down the covering bypasses the purlins and purlin dripping is avoided.

Abstract: A method of plant cultivation and growth acceleration includes enclosing the plants within a reflective chamber, controlling the CO.sub.2 concentration within said chamber so as to be at least 200 ppm, and irradiating the plants substantially omnidirectionally with a light intensity of approximately 3000 lux, while stably regulating the ambient temperature, relative humidity and nutrient supply.

Abstract: A self-ventilating greenhouse and frame therefor. The frame comprises a series of aligned sideposts connected to a series of partially overlapping frame members which support a translucent roof. The frame members are hingedly joined by a series of cross-members which guide the frame members as the roof is opened and closed by means of a worm gear or a rack and pinion.

Abstract: A multi-functional nursery cultivator includes a carrier support having a tank assembly operably secured thereto with a spraying assembly operably connected to tank assembly. The carrier support is rendered mobile and is powered by a detachable zero-turning radius tractor. Additionally the spraying assembly can be modified to include a cultivating assembly.

Abstract: A device and method of constructing articles of fresh cut parts of plants and artificial decorative embodiments. The packaging is characterized by enveloping such articles with an inflated balloon. The article being placed in an open container, a balloon is then inflated and receives the article and container and is then securely attached to the container, thereby enclosing the article. A device for constructing the packaged article employs a rigid conduit which is received in the balloon to facilitate reception of the article and container. The gas used to inflate the balloons can be air or nitrogen. If cut flowers are used, the container is provided with some water and plant food.

Abstract: A ventilating construction, such as for a cold frame or for other desired structures, and method of making the same are provided, the ventilating construction comprising a sheet of material having an opening therethrough a flap hinged to the sheet for opening and closing the opening. The sheet comprises two like walls of polymeric material disposed in spaced apart substantially parallel relation with a plurality of spaced apart substantially parallel ribs of polymeric material disposed between the walls and interconnected thereto. The flap comprises a section of the sheet cut therefrom to define the opening and having at least part of one edge thereof being uncut so as to be integral and one-piece with one of the walls to provide a natural hinge therewith.

Abstract: This invention relates to a method and apparatus for injecting agrochemicals into the subsurface of the soil without tilling of the soil. A high pressure pump delivers the solution to be injected to a series of injection nozzles. The injection nozzles cause liquid jets to be formed which have sufficient velocity and narrow cross-section to inject into the soil. The injection nozzles are supported by a shield-pan which rides on the surface of the soil. The apparatus causes continuous injection from a plurality of nozzles. The shield-pan minimizes clogging of the nozzles. In the preferred embodiment, a second low pressure system is incorporated to broadcast spray the soil surface. This is a low-pressure system utilizing a boom with broadcast nozzles.

Abstract: A process for erecting an inflatable building structure which is especially adapted for housing plants. The process includes the steps of(1) installing a plurality of support posts in the ground or other suitable base;(2) attaching a roof structure formed from one or more inflatable membranes to the plurality of support posts; and(3) inflating the inflatable membrane.Preferably the inflatable membrane has peripheral rigid support members which are each attached to a row of associated posts. The roof structure formed from the inflatable membrane(s) together with rigid support members may be initially laid on the ground before being elevated. There also may be provided an upper securing cable extending across the top of the or each inflatable membrane which may initially be in a slack condition but which is subsequently tensioned before inflation.

Abstract: A greenhouse structure for growing plants using nutrient feed solution. The structure comprises a plurality of elongated greenhouse production areas. Each area has a shell and a base enclosing a predetermined space within which plants are grown. The areas radially extend outwardly from a central supply area in which nutrient feed solution is supplied to the production areas is kept. The base of each of the production areas are sloped upwardly in the direction away from the central supply area so that excess nutrient feed solution passing to the production areas will return by gravity flow to the central supply area. The structure further provides pump and conduit means to supply nutrient feed solution from the central supply area to the production areas. The conduit means are sloped to return by gravity flow excess nutrient from the production areas to the central supply area.

Abstract: A portable wheel-about greenhouse is provided formed with a transparent top portion of double wall insulated construction configured to engage in interfitting relationship with a bed portion also formed of double wall construction providing further insulation to said bed thereby. Said transparent cover portion may be positioned in spaced relationship to said bed portion periodically by means of spacer elements positionable at respective corners of the bed and cover members. At least one pair of over-sized wheels are utilized for ease of portability and convenience in transport of said greenhouse from one site to another.

Abstract: A plant flat handling system for handling floatable plant flats employs a horizontally extending main channel which can be flooded from either a water tank or a nutrient containing tank with a plurality of branch channels extending outwardly from the main channel. Gate valve means between the branch channel and the main channel can be opened to permit the main channel to fill the branch channel or to drain the branch channel when the main channel is drained. Plural wires extend along the length of the branch channels and support floating plant flats when the branch channels are drained. Periodic flooding and draining of the branch channels is effected until plants in the flats have matured and can be harvested. Harvesting is effected by maintaining light pressure against the outermost plant flats in the branch channel to urge the body of plant flats toward a main work area overlying the main channel. A power conveyor extends downwardly into the branch channel and lifts the flats therefrom for harvesting.

Abstract: A heat storage composition excellent in heat storing effect contains calcium chloride hexahydrate as the main component and an appropriate amount of a nucleating agent combination for inhibiting supercooling which is composed of barium sulfide, barium chloride dihydrate and strontium chloride hexahydrate or of barium chloride dihydrate and strontium chloride hexahydrate and optionally contains an appropriate amount of a thickening agent combination composed of an ultrafine silica powder and glycerin. Latent heat storage capsules contain the above heat storage composition and are improved particularly in their structure such that improved heat storage and release effects can be produced. A temperature control apparatus can make most of the heat storage capsules in the temperature control of a hothouse or the like.

Abstract: A method of heating a greenhouse by means of an immersed water-bed (basin) which act as a heat radiator sit underneath the complete surface of the cultural soil; this immersed water-bed (basin) filled with gravel is heated by means of hot water or steam heating coil.

Abstract: A cooling system for a greenhouse comprising a plurality of water pipes mounted over the exterior surface of the structure to carry water from a source, with water outlets in the pipes to enable water to spray over the exterior surface, and controls associated with the pipes to control and regulate the amount of water and duration of spray received by the exterior surface of the structure.

Abstract: A light ray radiating device for effectively dispersing light ray energy emitted from an optical conductor cable into a direct-light ray component and into an indirect-light ray component in order to cultivate plants more effectively. The device comprises an upper plate having a hole through which the light-emitting end of an optical conductor cable is inserted at the approximate central portion of the upper plate, a lower plate composed of a light diffusing and reflecting liquid-crystal plate is disposed so as to be opposed to the light-emitting end of the optical conductor cable, a frame body for unitarily mounting thereon the upper plate and the lower plate, and an intermediate plate having a light ray passing portion at the central part thereof and mounted on the frame body between the upper plate and the lower plate. The light ray energy passing through the lower plate composed of the liquid-crystal plate is controlled by changing the voltage applied thereto.

Abstract: A structural aluminum extrusion which supports glass, plastic or other building panels and is also specially formed to house a lighting system. The panels are clamped edge to edge on one edge portion of the extrusion and a channel is formed in the opposite edge portion. The channel houses an elongate glass tube filled with neon. A special clip inserted in the channel holds the tube and the high voltage wire which supplies power to the tube. A snap on diffuser lens covers the channel and encloses the components of the lighting system.

Abstract: Greenhouse screen for use as a filter for short-day treatment of plants and made of a film, textile, non-woven material or a combination thereof with high light resitance and good weathering conditions. The greenhouse screen at least partly consists of a material which in one or more layers has high absorption of light in a significant part of the wavelength interval 575-800 nm and with substantially total absorption in the wavelength interval 600-750 nm and which has high transmittance of light in the wavelength interval 400-575 nm.

Abstract: Construction for roof of greenhouse consisting of triangular glazed panels are hinged together and removable to provide a sawtooth construction when assembled and placed over a rectangular base.

Abstract: A relatively small sprayer for liquid fertilizers, weed killers, herbicides or the like is mounted on a small frame and is attachable to a three-point hitch of a tractor or may be pulled by hand. A tank is mounted on the frame and a ground engaging roller is journalled transversely across the rear of the frame. An open based enclosure encloses the roller and shields the spray nozzle boom which extends transversely adjacent the front of the enclosure. The nozzles spray the liquid downwardly and rearwardly so that it strikes the plants on the front and top side thereof. It also maintains the roller in a wet condition so that the roller engages the rear of the plants as it passes over same thus ensuring a complete treatment of the vegetation. Flexible skirts extend downwardly from the front and side edges of the enclosure to prevent any spray escaping from around the perimeter of the enclosure.

Abstract: A heat exchanger comprises a housing containing upper and lower layers of fluid, the upper layer being less dense than the lower layer. The large and sharp density gradient at the interface between the upper and lower layers acts to prevent mixing of the two layers. A plurality of vertically oriented tubular sleeves that are closed at each end and filled with fresh water are located in the housing such that the axial ends of each tubular sleeve are in different ones of the layers. Heat added to the liquid in the lower layer is transferred to the liquid in the upper layer through the medium of the water contained in the tubular sleeves.

Abstract: A greenhouse for growing plants in desertic areas, including a watering system for recuperating condensate water from morning and evening dews and feeding this collected water to the plants.

Abstract: A device is disclosed for air conditioning in a winter garden, more particularly for dehumidifying a winter garden in order to avoid formation of perspiration and condensation water, the device having a housing (16) in which first, second and third heat exchanger means (26,28,30) are selectively connectable to a compressor means (32). Communication between said heat exchanger means and compressor means may selectively be established in such a manner that the winter garden can be dehumidified, cooled or heated, as required. At the same time, the device permits heat from the winter garden to be recovered for use in the dwelling house (10).

Abstract: A portable table having a platform comprised of a light-weight material with an outer insulated surface and a removable insulating cover. The platform includes a handle, a recessed dry storage compartment and a recessed ice storage compartment separated from the dry storage compartment by a separating member. A threaded orifice is provided between one storage compartment and the side of the platform for storing and draining water from the table. The table further includes supporting members fixedly secured to the botton of the platform for setting the platform on a conventional table and also includes legs pivotably secured to the platform to support the platform above the ground or floor. The legs are provided with retractable locking rings which frictionally engage the supporting member to secure the leg into position. The table includes numerous accessories which may be readily mounted to the table including a "sneeze" guard.

Abstract: The terrace glasswork, which is particularly simple to adapt to building conditions, contains the following features: (a) It is made up of a vaulted roof, which is supported above on an existing wall and below on the terrace floor; as well as two gable parts. (b) The roof is made up along its length of several identical, glassed in arch components, the side frame parts of which can be joined and sealed to one another. Each of the latter has two movable glass panes (17, 20) guided so as to slide at different levels. (c) The gable parts are each made up of three gable components, namely of a square basic component (4) and two connecting components (5a, 6a) each of which to the arch components, and which connects together two right-angled frame sides of the basic component (4).