Showing papers on "Stub (electronics) published in 1979"

Apparatus and method for refinishing turbine blade airseals

Abstract: A method and apparatus for restoring airseals on gas turbine blades and vanes. A worn or damaged airseal is removed by abrasive belt grinding perpendicular to its length to create a stub. Then a piece of material is joined to the stub, as by welding. Next the airseal weldment is contoured using abrasive belting, perpendicular to the weldment length. The invention is particularly advantageous for the repair of components having two airseals of different dimensions. A single two-position fixture is usable to remove old airseals and to refinish airseal weldments. Refinishing is accomplished with a contoured belt; the contour is chosen to be intermediate, but within the tolerance of, the contours of the first and second airseals. As a result, airseals are economically restored in short runs.

Hydraulic valve for two-speed power take-off drive

Abstract: A hydraulic valve for a two-speed power take off selectively operated by a reversible stub shaft providing the proper output drive.

Vertical antenna with stub cancellation means

Abstract: Vertical antenna including a vertical radiator having a height of three-half wavelengths, a cancellation stub electrically connected to the vertical radiator three-quarters wavelength upward from a feed point at the base of the vertical radiator and extending downwardly one-quarter wavelength and upwardly one-half wavelength from the electrical connecting point of the vertical radiator, an insulation member mounted in a mounting post and supporting the base of the vertical radiator, quarter wavelength radials extending outwardly in the same plane and at right angles to the vertical radiator from the mounting post, and a transmission line connected between the feed point at the base of the vertical radiator and the radials. The gain of the vertical antenna is theoretically 3.2 db over a half wavelength dipole antenna. The vertical antenna is particularly lended to operation in the VHF spectrum and above.

Modular wind electric power plant

Abstract: A wind electric power plant that has the working components thereof assembled and aligned as a stub tower, then tested at the factory prior to shipment of the assembled stub tower to a use site. The power plant includes adjusting wedges for establishing and maintaining proper alignment between an alternator and a drive unit during shipment and installation.

Conformal dielectric-filled edge-slot antennas with inductive-post tuning

Abstract: A class of circumferential-slot antennas, called edge-slot antennas, that are ideally suited for conformal mounting on conducting bodies of revolution has been developed. The simplest form of the antenna is a disk of dielectric substrate that is copper-plated on both sides and mounted between two parts of the conducting body so that the aperture coincides with the surface. The antenna is excited by a single coaxial stub at the center and is tuned for proper operating frequency by inductive posts that connect the two copper-plated sides of the disk. By varying the number and location of the inductive posts the operating frequency of a disk can be tuned over a 6:1 range. Instantaneous bandwidths of three percent are typical. In practice, plated-through holes are used as inductive posts to provide mounting and access holes. The single coaxial feed excites azimuthally symmetric fields that are not significantly distorted by the symmetrically placed inductive posts. Therefore, radiation patterns of edge-slot excited bodies display a high degree of azimuthal symmetry. The small size, light weight, and inexpensive fabrication procedure make the edge-slot antenna attractive for many applications.

Microstrip bandstop attenuation equaliser - has three open circuited stub lines connected via specified resistors to continuous metallic strip

Abstract: The equaliser is for the microwave range, and consists of a substrate completely coated with a metal layer on one side. The other side has a continuous metallic strip from which open circuited stubs branch off. The length of the stubs and their separation corresponds to a quarter wavelength at the stop band centre frequency. A resistor (R1-R3) is inserted at the junction of each stub with the conducting strip (3). The resistors (R1, R3) in series with two outer stubs (4, 6) have specified equal resistances normalised w.r.t. the characteristic impedances of external connecting lines. The resistances are functions of the maximum attenuation in db. the series resistor (R2) of the middle stub line (5) has a valve R2 = 1/2(R1-1/R1)Z212, where Z212 is the normalised value of the characteristics impedance of the conducting strip sections (7, 8) between the stub lines.

Preterminated block system and method of installing same

Abstract: A predetermined block system for use in outside underground utility distribution networks, such as networks for providing telephone service, includes factory installed cable stubs spliced into a main distribution cable and encapsulated at predetermined intervals along the length of the distribution cable. The free ends of each cable stub are attached to one side of a terminal block which is adapted to be mounted in an aboveground or flush to the ground closure. Service wires may then be attached to the other side of the block. The cable stub includes a pair of bond wires insulated from each other. At a splice opening formed in the distribution cable one bond wire is connected to a field side and the other bond wire is connected to the central office side of the cable shields of the distribution cable. The bond wires terminate at commonly grounded terminal posts in the terminal block. The common ground may be provided by a ground braid fastened to the closure. This ground braid provides an aboveground disconnect feature for isolating and testing different sections of the buried distribution cable shields. The cable stub also includes twisted pairs of conductor wires spliced into preselected distribution wires carried within the distribution cable and connected to one side of conductive terminal posts mounted in the terminal block.

Heating plate glass for antenna extension

Abstract: PURPOSE:To improve FM broadcast reception and AM broadcast reception by improving the directivity of a received radio wave in the very high frequency band, by extending a lead wire that connects the start point of a very high frequency container to a heating conductor via stub connected to the start point. CONSTITUTION:On the surface of rear window glass 1 of a car, several heating conductors 10 are grouped and provided in parallel to the lateral direction of glass 1 together with each conductor element 11, which is connected to buses 12 and 13 at both its ends. At the upper of the heating area of this conductor 10, very-high- frequency antenna 14 long enough for FM broadcast reception in the best state is provided which extends from the center part laterally in parallel to elements 11 and has its tip folded in parallel to elements 11 and in a channel shape, as well as feeder 17 which extends from antenna start point 15 of antenna 14 to feeding terminal 16 and stub 18 which extends from start point 15 in parallel to elements 11 and in the opposite direction to antenna 14 and is folded in a channel shape. Then, stub 18 and elements 11 are connected together by lead wire 19 to improve the directivity of the very high frequency band.

Method of fabricating optical fibers

Abstract: The separate steps of forming an optical fiber preform and then drawing the fiber are combined into an essentially simultaneous process wherein a "stub" preform (18) is formed by means of the so-called "vapor-phase axial-deposition" method while the fiber (17) is simultaneously drawn from the end of the stub that is opposite to the end upon which the particulate matter (14, 15) is being deposited.

Flywheel for driving rail or road vehicle - has stub shafts with intermediate hollow conical components coupled to flywheel at larger ends

Abstract: The flywheel is coupled on both sides via an intermediate component to a stub shaft, the component having an annular portion by which it is secured to the flywheel. The component (11) is a half-open cylindrical or conical body, its open end with the largest diameter being secured to the flywheel (10), while the other end has a stub shaft (12, 13). The component has a shape and material where it is fixed to the flywheel to give it a radial stiffness. The component can have one or more conical portions and can be of anisotropic and typically fibre-reinforced composite material.

Coaxial stub tuner

Abstract: A coaxial stub tuner assembly is comprised of a short circuit branch diametrically opposite an open circuit branch. The stub of the short circuit branch is tubular, and the stub of the open circuit branch is a rod which extends through the tubular stub into the open circuit branch. The rod is threaded at least at its outer end, and the tubular stub is internally threaded to receive the threads of the rod. The open circuit branch can be easily tuned by turning the threaded rod in the tubular stub to adjust the length of the rod extending into the open circuit branch.

Wide band glass antenna

Abstract: PURPOSE:To make it possible to obtain an non-directional characteristic throughout a wide band by providing a prescribed antenna for very high frequency in the upper part of an antenna for intermediate wave. CONSTITUTION:Antenna line 14 for intermediate wave is provided in the upper side of window glass 1 of a car provided with heating electric wire group 10. Antenna line 15 for very high frequency is provided which extends in parallel with line 14 with the position, which corresponds to the approximate center in the longitudinal direction of line 14, as the start point and is bent in the edge upward and is folded in parallel. The length of antenna line 15 and the length of stub 19 connected to the start point of antenna line 15 are so adjusted that the gain may be maximum. The length of the folded part of antenna line 15 and the length of auxiliary line 20 are so adjusted that the antenna may be non-directional. Thus, the antenna having a non-directional characteristic throughout a wide band can be obtained.

Power transmission using bevel gears - has auxiliary gear pair mounted on their shafts with clearance to increase power capacity

Abstract: A bevel gear box (6) transmits power from the shaft (7) to the shaft (8). The power transmitted can be doubled by using an additional pair of bevel gears (3) and (4) which are mounted on stub shafts (9, 10) with a clearance (j1). With this arrangement of gears the extra power can be transmitted without increasing the size of the gear box. In addition the separating force between each set of meshing teeth is equal so that no bending moment is exerted on the shafts (7, 8) and the journal load on the bearings is also reduced.

Wind propelled apparatus

Abstract: An improved wind-propelled apparatus is disclosed which includes a body mounting a stub mast generally orthogonal thereto. The stub mast is mounted in a well formed on the body and secured by a sleeve, resilient annulus and plug combination. Mounted on the stub mast is a generally vertical sail mast which is rotatable about a vertical axis. The stub mast also mounts a boom of sufficient length as to be capable of passing under the sail and having an eye and strap arrangement for securing the boom on either side of the sail.

Power window lift assembly

Abstract: A power lift assembly for applying a rotary cranking force to the crank stub of a mechanical window crank in an automobile door is disclosed. The power lift assembly is intended for use in combination with an automobile door having interior and exterior side panels enclosing a compartment, a window mounted for reciprocal movement into and out of the compartment, and a mechanical crank assembly contained within the compartment and coupled intermediate the door and window. The force required to raise and lower the window is developed by an electrical drive motor which is mounted on the interior panel at a remote location relative to the crank stub. The rotary driving force developed by the drive motor is transmitted to the crank stub through a flexible drive shaft and a worm and gear assembly which is coupled directly to the crank stub. A switch assembly is provided for selectively applying electrical excitation from a power source to the drive motor, and includes a support housing which encloses the switch assembly and the gear assembly. Travel of the window is limited by the existing channel structure of the door with drive motor overheat control being provided by a self-interrupting and self-resetting current responsive switch coupled in series electrical circuit relation with the field winding of the drive motor.

Method for producing a connection to the downpipe of a drainpipe, and means for carrying out the method

Abstract: During renovations of old buildings it is desirable to connect new connections to an existing downpipe of a drainpipe. In the case of the proposed method, the downpipe (1) is broached at the desired height and a sealing (3) connecting stub (2) is inserted. The stub (2) is pressed onto the downpipe (1) by means of a collar (4) which engages around the downpipe and the stub. The stub (2), which is advantageously manufactured from plastic, has a collar (22) over which a seal (3), in the form of a profiled rubber ring with lips (31), can be pushed.

Wideband phase velocity compensated UHF line coupling - by short inward pointing stubs on dielectric substrate with metal backing surface

Abstract: Wide band phase velocity compensated line coupling is for UHF use. The coupling can be unidirectional with a 20db rejection. Typically the pass band fmax/fmin=3 and the standing wave ratio = 1.38. Compensation is by one or two short inward facing studs (52, 53) extending from parallel strip lines (2, 3) on the surface of a dielectric substrate (1) which has a complete metal backing surface. The length of the stub in the direction of propagation is lambda/40. the space (e) between the stubs determining the amount of phase compensation. The studs can be introduced at the entrance to a Schiffman cell.

Apparatus for bonding a plastic case to a stub cable

Abstract: A coiled section (16) of a plastic sheathed stub cable (10) is placed on a support (43) which is orbited about a longitudinal axis of a straight section (13) of the stub cable. The straight section of cable is positioned coaxially within an aperture formed in a casing part (12) which is mounted in a rotating nest (16). The juncture (70) between the apertured casing and the cable sheath is heated (81), whereafter a bead (91) of bonding material is extruded around the juncture. A molding die (106) is moved onto the extruded bead to force portions of the bead into the juncture to form a homogeneous weld with the cable sheath and casing parts while uniformly shaping the remaining portions.

Method of manufacturing a crank arm for a welded crankshaft, and a pressing equipment for carrying out the method

Abstract: For manufacturing a crank arm for a welded crankshaft a flat blank is gripped along its contour in a ring-shaped holder and is subjected to pressing forces acting perpendicular to the plane of the blank to produce, by extrusion, a crank pin stub and a journal pin stub projecting from opposite sides of the blank, respectively. Each stub can be extruded in two stages, the first of which results in a by and large axial material flow while the second stage produces a combined axial and radial expansion of the first formed stub to circular cylindrical shape. Simultaneously with the first extrusion a fillet merging smoothly into the stub is pressed into that lateral surface of the blank from which the stub is extruded. The fillet may extend continuously around the stub or alternatively it may be indented only along that part of the stub surface which is oriented towards the other stub. A pressing equipment for carrying out the method comprises a stationary lower tool with a segmented ring which determines the contours of the stub formed by the extrusion and of the surrounding fillet. The equipment comprises two interchangeable upper tools each having a pressing mandrel arranged to produce, in cooperation with an anvil at the bottom of the ring a substantially axial and a combined axial and radial flow of material, respectively, within the extruded stub.

Device for the inspection of welds

Abstract: Device for the inspection of a weld joint between a tubular stub and a wall, whereby a test probe is carrying out a rotational as well as a translational movement with respect to the stub, so that the probe is moved substantially parallel to the plane of the weld joint and the angle under which the weld joint is scanned remains substantially the same irrespective of the angle between the axis of the tubular stub and the wall.

Double combination key for vehicle locks - has two opposite notched edges and neck stub preventing introduction of wrong key edge to lock

Abstract: The double combination key for vehicle locks has a different combination of notches along each edge of the key so that two locks can be opened by one key. A neck stub on the key prevents the key from being introduced to the wrong lock. The part of the lock barrel opposite that receiving the correctly cut edge of the key is arranged so that it allows rotation of the wrongly cut edge of the key.

Low pressure warning for car tyre - has spring contacts with central connection through wheel bearing to operate warning relay

Abstract: The low pressure warning control for a vehicle tyre has a sprung switch formed by a springs (14, 15) set over, the centre of the wheel stub (1) with an electric connection through the centre of the wheel stub. The switch earthes the control line from a switching relay (18) to operate the low pressure alarm. The switch is activated by a pressure arm (11) linked to the tyre valve. The system provides simple and direct control signals without the complexity of inductive pickups etc.

Small pump or turbine for aquaria - has quick release couplings on stubs of casing with internally supported shaft

Abstract: The accessory has a cylindrical plastic body (1) with an inlet stub entering it tangentially and an outlet (8) leaving it vertically. There is a quick release coupling on the inlet stub formed of a rolled annular groove to take the lip of a connecting pipe. The body has a lid (10) which has a stub (11) on top. This contains ratchets (13) to form a quick release coupling with a pipe or other accessory which can be attached on top of the fitting. The lid (10) supports a shaft (16) which carries radial blades (17) to form an impeller for a turbine or pump to circulate the water in the aquarium.

Matching network for very short waves - has two resonating stubs terminated by sections of inner conductors and centred in outer conductors

Abstract: The network is in the form of a stub in a coaxial signal circuit of a reflection amplifier. The open ended or short-circuited stube is n half or quarter waves long (3, 4). It is mounted eccentrically to the signal conductors (1, 2), and carries at its ends movable sections (5, 6) of inner conductors, inserted into axial holes of a fixed inner conductor (4). They are springily held there and centred by insulating sleeves (7, 8) in the outer conductor (3).

Document set with stub and narrow transfer strip

Abstract: An improved multiple ply document set and method of manufacturing some is disclosed. The document set includes a transfer medium in the from of narrow ribbons extending longitudinally of the document set, preferably centrally thereof, between the posed plies. me narrow ribbons are attached to the superposed plies in the stub portion of tie document set, the stub portion being defined by lines of weakening extending across the superposed plies. The narrow ribbons are fed between the plies in continuous fashion during manufacture of the document sets. The invention greatly reduces manufacturing costs and provides numerous additional advantages as outlined in the specification. The invention is particularly suitable in the manufacture of postal money order forms but is not limited thereto.

Two stub tuner in waveguide bend

Abstract: In order to cancel unwanted reflected waves in a waveguide system, two micrometer-driven stub tuners are inserted in a waveguide bend. A first tuner is inserted through the outer bend wall to extend axially along one leg of the bend and includes a dielectric rod having a reflecting slug at its tip. Axial movement of the rod permits the variable position of the slug to vary the phase of the wave which it reflects. The second tuner includes a metal rod, which enters the waveguide transversely from the inner wall of the bend, diametrically across from the entrance of the dielectric rod, and permits adjustment of the magnitude of the wave which it reflects.

Exhaust system for vehicle IC engine - has chromium plated stub on outlet containing replaceable filter material

Abstract: A stub duct is fixed to the end of the exhaust system of the internal combustion engine of a vehicle. The stub is filled with a cotton like material which filters the bases being discharged. After a period of use the filter material is replaced by clean new material. The stub duct is made of steel and chromium plated.

Lateral reflector for bicycle wheel - has securing slot in stub locked over spoke by U=shaped clamping wedge

Abstract: The reflector for a bicycle whee has a round disc (1) with a central stub (5). The stub is slotted to slide over a spoke (9) and is secured by a U-shped insert wedge (6), with the reflector and wedge clipped onto the spoke from different sides. The reflector surface is applied to both sides and provides lateral recognition in the dark.

Power brush apparatus

Abstract: A power brush apparatus for use in cleaning airplanes or the like which includes an elongate hollow handle with a drive member coaxially mounted and journaled within the hollow handle and which drive member is connected at one end to a drive motor in a driving connection and at the opposite end to a stub shaft arranged in a housing at an angle of about 45° with respect to the longitudinal length of the handle and a brush of the rotatable type is secured for rotation to the terminal end of the stub shaft.