Showing papers on "Anchoring published in 1991"

Post anchoring device

Abstract: An anchoring device for supporting a post in a generally upright, vertical position. The anchoring device includes a base plate having a surface area substantially greater than the cross-sectional surface area of the post to be supported, and a plurality of ground-penetrating stabilizing pins spaced near the perimeter of the base plate.

Shaft anchoring apparatus

Abstract: Apparatus for reliably anchoring a vertical shaft to various types of earth. The apparatus includes an anchor pin having a helically coiled portion at the lower end thereof designed to be screwed into the ground, and a shaft holder releasably attached to the anchor pin and having a shaft-receiving opening through which a shaft carrying a load to be anchored is adapted to be extended. The shaft-receiving opening is laterally offset from its attachments to the anchor pin such that the shaft may be extended fully through the opening and firmly inserted into the ground. The anchoring apparatus of the invention is designed for general use in anchoring vertical shafts carrying various types of loads including umbrellas, birdhouses, signs, flags and the like.

Tie down stake

Abstract: A tie down stake for anchoring small aircraft or other objects to the ground in any soil conditions and which consists of a central hub with an eyelet and arms which extend away from the hub. At the opposite end of each arm consist of holes that serve as stake guides for directing a plurality of anchoring rods at a fixed angle downward and inward into the ground. Thus joined by the arms and hub, the anchoring rods cooperate together to form a secure earth anchor. Also disclosed is a rod extraction tool.

Threshold behavior and electro-optical properties of twisted nematic layers with weak anchoring in the tilt and twist angle

Abstract: Analytical and numerical calculations of threshold behavior and electro‐optical characteristics in twisted chiral nematic layers are presented, when weak anchoring in the tilt and twist angle of the director is assumed. An analytical expression for the effective twist angle and the Freedericksz threshold voltage is derived. In cells with bistabilities, we investigate the influence of the anchoring parameters and device parameters on the width of the hysteresis. Using the 4×4‐matrix formalism of Berreman [J. Opt. Soc. Am. 62, 502 (1972)], we demonstrate the influence of the weak anchoring on the transmission‐versus‐voltage characteristic.

Earth anchor system

Abstract: An earth anchor that can be driven into the ground to a desired anchoring depth and which has a tie rod extending therefrom for connection to an above-the-ground structure to be supported. The anchor is in the form of a stamped plate having a substantially flat co-planar body portion with a tapered ground entry end and with planing wings formed at a trailing end which are angled out of the plane of the body portion for guiding the anchor plate into a substantially horizontal anchoring position upon tensioning of the tie rod. The anchor plate is formed with a stepped drive rod receiving notch in the trailing end which is engageable by the head of the drive rod and which maintains the anchor plate in coaxial relation to the drive rod as it is being driven into the ground.

Device making it possible to instal, without tooling, fastening points for securely positioning and anchoring a load

Abstract: The device makes it possible to position and to anchor easily secure fastening points for immobilising any loads on a suitable structure. A rail (11) of special shape receives the anchoring points, according to the appended figure, which can be fixed at any point whatsoever on the rail. Eccentric cams (6) which can easily be operated by means of levers (7) make it possible to immobilise an anchoring point, by pinching the rail (11) between the head of the screw (2) and the base (1) of the anchoring point. Suitable machinings prevent the anchoring point from slipping on the rail, even under the effect of significant urging. The device is intended, in particular, for immobilising loads transported on platforms of lorries or trucks (wagons).

Experimental measurement of the azimuthal anchoring energy function at a SiO–nematic interface

Abstract: The functional form of the azimuthal anchoring energy, i.e. the anisotropic part of the interfacial free energy, at the interface between the nematic liquid crystal 4-n-pentyl-4′-cyanobiphenyl and an obliquely evaporated SiO substrate is measured for the first time by using a reflectometric method. The anchoring energy function is obtained by measuring the director rotation on the interface caused by an external magnetic field ranging from 0 to 2·3 T. The dependence of the anchoring energy on the director azimuthal angle is found to be well fitted by the function W a(ϕ) = W asin2 ϕ in agreement with the predictions of the Berreman model for the anchoring at a grooved interface.

Static splay-stripes in a hybrid aligned nematic layer

Abstract: A usual aperiodic hybrid alignment can appear in a nematic layer with weak anchoring only if the cell thickness is greater than a critical value dh, below which a static periodic pattern instead of the hybrid aperiodic structure could be preferred, if the energy cost for a three dimensional deformation, involving twist, is less than the cost for the two-dimensional deformation of splay-bend type. We have studied the occurrence of the mechanical instability leading to the static periodic splay-stripes, i. e. in the case of the tilt anchoring stronger at the one of the walls, in which the anchoring is planar, for several values of the twist anchoring strengths. Here the behavior of the threshold d for the periodic stripes is presented and discussed as a function of the anchoring energies and of the ratio of nematic bulk elastic constants, in the frame of the usual continuum theory

Swedge anchoring assembly

Abstract: An anchoring assembly for use in a hole bored inwardly from the surface of a receiving material. The anchoring assembly includes, in general, an anchoring component or swedge anchor having a plurality of fingers, a spreading component or spreader having a tapered portion which points toward the anchoring fingers, a bolt or threaded shaft onto which the spreader and swedge anchor are positioned, and structure for interlocking the anchor and spreader together during the procedure for setting the assembly into a receiving material.

Order parameter spatial variation and anchoring energy for nematic liquid crystals

Abstract: A spatial variation of the nematic scalar order parameter leads to a surface anchoring energy renormalization. This renormalization is a consequence of torque conservation and of the ‘‘macroscopic’’ definition of the surface orientation. The order change comes from an assumed property of the boundary or from an external curvature constraint inducing surface melting. In both cases, the maximum effect leads to a surface extrapolation length comparable with the nematic‐isotropic coherence length. Strong anchoring data should be remeasured and reinterpretated.

Anchor, in particular for a concrete panel

Abstract: The anchor rod ( 2 ) has a lateral bulge or projection ( 5 ) running along its length and constituting an anchoring element for providing anchoring in a direction perpendicular to the longitudinal direction of the rod ( 2 ). Such an anchor is applicable to lifting and handling panels, in particular panels made of reinforced concrete.

Set of modular anchoring elements for mounting a fluid-operated workpiece-clamping element on a supporting pallet

Abstract: A set of anchoring elements including a first and a second anchoring element of modular type, usable either as an alternative to or in combination with one another in relation to the requirements of height adjustment of a clamping fixture's components. Each of the anchoring elements includes a hollow external casing provided with a hollow threaded screw for its fastening to an underlying anchoring element or to a supporting pallet for a piece which is to be machined, and a hollow threaded bush for the fastening of a clamping fixture's anchoring element or active component located immediately above. The first and the second anchoring element are provided with structure suitable for preventing their rotation with respect to the underlying anchoring element, or supporting pallet. Moreover, the second anchoring element includes a hollow internal casing in which the threaded bushing is housed, which is axially slidable with respect to the external casing for the adjustment in height of the upper component or anchoring element located immediately above.

Material handling apparatus with multi-directional anchoring

Abstract: A material handling apparatus comprises a chassis, an anchoring mechanism retained in the chassis and a material handling mechanism secured to the chassis. The anchoring mechanism provides multi-directional anchoring of the chassis onto a penetrable surface upon which the apparatus rests. The anchoring mechanism comprises a pair of counter-rotating shafts whose lower ends comprise left and right-hand helical augers, respectfully. The upper ends of the shafts are drivingly connected to a means of rotation. The material handling mechanism pulls, pushes or lifts the material being handled. The anchoring mechanism is so retained in the chassis to react the operating forces of the material handling apparatus. Use of this multi-directional anchoring mechanism obviates the requirement for massive, traction based devices, which presently perform large material handling tasks.

Strain-induced anchoring transitions

Abstract: The orienting action of a mica surface on nematic liquid crystals is studied using a polarizing microscope. The experiments show that anchoring transitions can be induced by mechanical strain of the crystal surface. Characteristics patterns of phase boundaries are observed close to genuine or artificial inclusions on the mica surface where shear strains have all possible directions and a large range of amplitudes. In order to describe the observations, the thermodynamic potential as a function of the anchoring direction is expanded in a Fourier series reflecting the symmetry of the solid substrate. It is shown that both the well known adsorption-induced and the strain-induced anchoring transitions can be interpreted in terms of the same generic anchoring diagram in Fourier space.

Anchoring Energy or Surface Melting in Nematic Liquid Crystals

Abstract: The influence of the spatial variation of the scalar order parameter on the anchoring energy is analysed. It is shown that if the nematic average orientation is forced to change too rapidly, a surface melting is expected. Furthermore, by considering two typical situations in which the surface scalar parameter is different or equal to the bulk one, the renormalization of the anchoring energy is estimated.

Set of anchoring elements of adjustable type for components of pieces clamping fixtures on a supporting pallet

Abstract: The set comprises a first and a second anchoring element (1, 18) of modular type usable either as an alternative to or in combination with one another in relation to the requirements of height adjustment of a clamping fixture's components. Each of them comprises a hollow external casing (4, 19) provided with a hollow threaded screw (2, 21) for its fastening to an underlying anchoring element or to a supporting pallet (3) for the piece to be machined and a hollow threaded bush (37, 13) for the fastening of a clamping fixture's anchoring element or active component located immediately above. The first and the second anchoring element (1, 18) are provided with means (14, 20) suitable for preventing their rotation with respect to the underlying anchoring element, or supporting pallet. Moreover, the second anchoring element (18) comprises a hollow internal casing (22) in which the threaded bush (13) is housed, which is axially slidable with respect to the external casing (19) for the adjustment in height of the upper component or anchoring element located immediately above.

Anchoring method of passing overhead wire

Abstract: PURPOSE:To simplify anchoring system by fixing D-type arms having anchoring unit to the opposite sides of a dismountable D-type arm existing on a pole then anchoring an existing overhead wire and cutting the overhead wire, thereafter removing the existing arm. CONSTITUTION:An anchor unit 8, assembled on the ground, is suspended above a dismountable D-type arm 7 existing on a pole by means of a hoist mounted on a high position working vehicle (not shown). Then a pair of arm metals 8a in the anchor unit 8 are lowered along the opposite sides of the D-type arm 7, and a bolt 9 is inserted into the bolt holes 8e, 7d of the anchor unit 8 and the D-type arm 7 in order to secure the anchor unit 8 to upper and lower horizontal arms 7a. Thereafter, each phase wire W is clamped with the anchor clamp 8d in the anchor unit 8 and the wire W is cut off at the opposite sides of an existing pass insulator 10. Then a vertical arm 7c is removed from the upper and lower horizontal arms 7a with the insulator 10 being fixed to the vertical arm 7c.

Equipment for casting plaster floor - comprises anchoring fillet locating on floor and vertically extending threaded bolts

Abstract: The equipment includes an angle piece (3) with a horizontal anchoring leg (19) and a vertical limit leg (20) which is fixed to the basic floor (1). The free longitudinal edges (18) of the horizontal anchoring leg (19) enable the angle piece to be pivotable both vertically and horizontally, and adjustable as to height. The free longitudinal edges of the horizontal anchoring leg are partly enclosed by a clamp piece (12) which by means of nuts (13,14) is vertically adjustable on a threaded bolt (8) standing vertically on the basic floor (10) The threaded bolt is a component of an anchoring fillet (8) and the clamp piece is formed as a two-piece component. The angle piece (3) the clamp piece (12) and a diagonal brace (23) used are all of aluminium, aluminium alloy or plastics. USE - For casting a plaster floor in a building.

Rope anchoring device for elevator

Abstract: PURPOSE:To eliminate the trouble of maintenance work with effect on a load detector at the time of nut operation for an anchoring tool eliminated by making the deflection of an elastic body due to a cage load detectable via the displacement of a working body inserted in a rope anchoring tool and an anchoring plate. CONSTITUTION:An elastic body 5 is provided so as to contact an anchoring tool 3, whose one end is jointed to a rope and the other end pierces an anchoring plate 2, and a nut 6, engaged with the piercing end of the anchoring tool 3 and one end is contacted to the above anchoring plate 2 and the other end is screwed in the piercing end of the anchoring tool 3. A working body 7, whose one end and the other end are contacted near to the rope and the nut respectively, is movably engaged with the above anchoring tool 3 with the anchoring plate 2 and the elastic body 5 pierced. Moreover the deflection of the elastic body 5 due to a cage load is transmitted to a detector 8 via the displacement of the working body 7 protruded from the anchoring plate 2 by providing the load detector 8 operable by the relative displacement of the anchoring plate 2 and the end part near to the rope of the above working body 7.

Construction system for erecting walls, and wall erection method using said system.

Abstract: not available for EP0511987Abstract of corresponding document: WO9111568A system comprising an assembly of prefabricated blocks (1) each with at least one through cavity (2) in the shape of a square-based right parallelepiped, and several anchoring pieces (3) for firmly locking together the rows of blocks arranged in pairs one on top of the other. Each anchoring piece (3) consists of a generally rectangular plate having upper and lower sloping edges (4, 5). The lower sloping edge (4) can cooperate with the upper sloping edge (5) of a similar anchoring piece on which the first anchoring piece (3) is placed, and the upper sloping edge (5) can co-operate with the lower sloping edge (4) of a similar anchoring piece which is placed on top of the first anchoring piece (3).

Method for anchoring on to a hollow structure made of composite material

Abstract: Method for anchoring on to (into) an elongate hollow structure made of composite material intended for elements such as guys (stays, shrouds), characterised in that there is connected to the anchoring location for the element, an auxiliary component (2) fixed by means of filament winding (3), the fibres of which point in the direction of the load exerted by the said element to be anchored, which is anchored to the said auxiliary component (2)

Fibre-reinforced concrete member

Abstract: PURPOSE:To improve bending yield strength and bending toughness by a method wherein anchoring bodies each having an anchor part are arranged to the bending reinforcing bar of cageform reinforcing bars formed of a FRP rod formed in a way to converge high strength fibers by using resin for curing. CONSTITUTION:Anchoring bodies 5 formed or a steel rod having an anchor part are arranged to a bending reinforcing bar 2a of a cageform reinforcing bars formed of an FRP rod. The anchoring body 5 is extended and coupled to a reinforcing bar 2b and may be functioned as a spacer. The anchoring bodies 5 are embedded in concrete 4 to form a concrete beam 1. This structure enables provision of a concrete beam having excellent bending yield strength and bending toughness.

Fascia for anchoring-bolts

Abstract: The utility model relates to a supporting plate for anchor rod used for roadway and tunnel in mine, and is particularly used for supporting the anchor rod in roadway of coal mine. A hole through which an anchor rod can penetrate is opened in the center of the supporting plate for anchor rod, the central position of the supporting plate for anchor rod is of a hollow sphere-shaped convexity, and the top part of the hollow sphere-shaped convexity can be provided with a platform; the supporting plate can be made of steel plate or cast iron, and in the supporting plate made of cast iron, reinforcing ribs can be arranged around the hollow sphere-shaped convexity. The utility model has the advantages of the improvement of stress state inside the supporting plate for anchor rod, strong bearing capacity and material saving.

Pulling-resistance window hook

Abstract: The utility model belongs to hardware, which relates to a pulling-resistance window hook. The utility model is composed of a wind hook and an eye ring. After improved, the eye ring is composed of an anchoring piece, an anchoring hole and a fixed ring, wherein, the anchoring hole is arranged on the anchoring piece. The eye ring can be fixed on a window by the anchoring hole through two nails. The utility model has the advantages of firmness, durability, simple technology, easy manufacture, light weight and easy installation. The looseness and the shedding of the window hook, which are caused by wind and use for a long time, can be resisted, and the window hook is not easy to twist out by hand. The utility model is a novel window hook with strong applicability for protecting the window glass for public facilities (particularly for middle and primary schools).

Anchoring device for bridge

Abstract: PURPOSE:To easily perform low cost construction work by integrally fitting a coating elastic member provided with a flange like elastic member on its outer peripheral face on an anchor bar and fitting an anchor cap on the anchor bar so as to be movable along the direction of expansion of a bridge. CONSTITUTION:The lower part of an anchor bar 1 is buried in a bridge pier 2 or an abutment with the upper part of the anchor bar 1 protruding from the bridge pier 2 or the abutment. Then, a flange like elastic member 6 is provided on the circumference of a coating elastic member 5 with which the protruding part of the anchor bar 1 is covered. The coating elastic member 5 is mounted on the peripheral face of the anchor bar 1. Next, an anchor cap 4 is fitted on the protruding part of the anchor bar 1. On the top face of the coating elastic member 5, a tip support elastic member 8 for securing a clearance toward the ceiling face of the anchor cap 4 is provided. When a bridge girder after construction is expanded by contracted due to change of temperature or the like, the peripheral part of the flange like elastic member 6 is deformed to absorb the displacement of the anchor cap 4. Vertical deformation is absorbed by the elastic deformation of the support elastic member 8.

Clamp type anchor

Abstract: The utility model relates to a clamp type anchor used for the post-tensioning anchoring of high-strength twisted steel, comprising an anchor ring and an anchor head. The clamp type anchor is characterized in that the cast steel anchor ring with the hardness of HRC 26-31 is provided with a through hole, the inner hole of the through hole forms a circular platform shape, and a cone angle has 8.5-11.5 DEG. The anchor head is formed into a circular platform body by two or more than two cast steel clamps with the hardness of HRC 24-29. The inner side surface of a rib clamping hole between the clamps is a smooth surface, and an included angle between the central line of the rib clamping hole and vertical direction is 1-3 DEG. When the clamp type anchor is utilized, the anchor head is pressed into the inner hole of the anchor ring, the outer threads of reinforcing bars are pressed in the clamps with certain depth during anchoring process, frictional resistance is increased, and anchoring performance is enhanced. The utility model has high anchoring performance, simple structure, low cost and convenient operation.

Wood anchored reusable type metal anchor botl

Abstract: The utility model relates to a wood anchored reusable metal anchor bolt which is suitable for underground mining and tunnel engineering support, belonging to a mechanical anchor bolt for anchoring in end head anchor class. The wood anchored reusable metal anchor bolt is characterized in that one end of a left anchor bolt is a pointed end, the other end of the left anchor bolt forms a circular shape, and an annular groove and an inverse ratchet are arranged at the bolt near the pointed end. The anchor bolt is matched with shim plates and round timbers to support rock layers. The wood anchored reusable metal anchor bolt has the advantages of simple processing, low cost, high recovering rate, etc.