Abstract: An antenna is provided for a wireless communication device such as a handheld radio or cellular telephone. The antenna may be either embedded internally in the transceiver or may be mounted externally thereof. The antenna comprises a pair of 1/4 wave radiating elements which are coupled out of phase to create an end fire bi-directional pattern for the antenna. The radiating elements are attached to a micro-strip transmission phasing device which is comprised of a center conductor, a ground plane and a substrate material. The micro-strip transmission phasing device supplies a zero degree to one hundred eighty degree phase shift from one radiating element to the other radiating element.

Abstract: Antenna mounts to enable a conventional antenna to be securely attached to a motor vehicle, such as a standard pick-up truck, and electrically connected to a radio that is carried by the truck. To increase the strength of the antenna mounts and thereby reduce the possibility that the antenna will snap off when subjected to high winds and other loads, the mounts are located through an existing hole that is established in a wall which surrounds the bed of many pick-up trucks. In one case, where the antenna mount is substantially recessed within a cavity below the existing hole in the wall, a fastener secures the antenna mount to the bottom of the cavity. In another case, where the antenna mount is partially recessed within the cavity, a pair of L-shaped clips are attached between opposite sides of the antenna mount and the top of the wall.

Abstract: An antenna wherein a rod is connected to a supporting base by articulated joint formed by a first articulation element rigidly connected to the supporting base and a second articulation element connected to the rod. The first and second articulation elements have contacting toothed surfaces which revolvingly cooperate to permit orientation of the rod to a selected orientation.

Abstract: A known mounting for attaching an antenna pole to a motor vehicle window comprises an antenna mounting plate which is fitted to the outside of the window glass and an inner plate which is fitted to the inside of the window glass. The inner plate includes an antenna connector and a connector for connecting a coaxial cable to a receiver/transmitter. With the intention of simplifying the antenna mounting in a manner which will enable the antenna pole to be readily removed but nevertheless to be securely held when the vehicle is in use, and also with intention of eliminating the deleterious effect of atmospheric conditions on the mounting and the component parts thereof, so as to prevent corrosion or rusting, the mounting plate is made of an electrically non-conductive material and has formed integrally therewith an attachment which coacts slidable with an antenna-carrying attachment piece.

Abstract: A mobile antenna mount structure has a two-piece assembly including an upper chamber adapted to hold a whip-type antenna, and a lower chamber for holding a spring-loaded contact. The upper and lower chambers are separated from one another by a wall which prevents passage of water.

Abstract: An improved panel mounting assembly for a vehicle antenna mast wherein the assembly is provided with an anchoring arrangement which eliminates the need for stamping a raised stiffening dimple in the panel design surface contour. A mounting assembly mast tubular holding section, which extends vertically through a panel aperture, is provided with a downwardly extending support tube uniquely coupled to and forming a part of the section lower end. The support tube is held in a subjacent body frame member opening by a snap-fitted rubber grommet permitting limited reciprocal travel of the support tube. The arrangement accommodates vehicle build tolerances between the panel and frame during assembly, while stabilizing the antenna structure against fore, aft and lateral movement relative to the panel.

Abstract: A connector for connecting a transmission cable to an antenna. The construction utilizes a rugged machine screw for holding the cable to the antenna, and is provided with a contact plate embedded in a plastic body which both seals the cable connections to the plate and machine screw and isolates the contact plate from the atmosphere when attached to the antenna.

Abstract: A transportable broadcast antenna supported on a moveable carriage comprising a telescoping tower having plurality of nesting sections, including an outer section, and intermediate and inner sections, each section slidable relative to the adjacent exterior tower section between retracted, deployed and release positions, and latches to hold the section in the deployed position. The latches disengage when the section is further extended to the release position, and is prevented from locking when the tower is retracted. Radials join the tower and extending outwardly therefrom.

Abstract: An antenna protecting device for motor vehicles including a triangular base made of magnetic conducting material, a gourd-shaped container having a small spherical portion at an upper part, a large spherical portion at a lower part, and a neck portion between the small and large spherical portions, the neck portion being rotatably connected with the triangular base, a bracket extending upwardly from a top of the small spherical portion of the gourd-shaped container and having a platform at an upper end, a screw being threadedly engaged with the platform of the bracket and extending downwardly into the spherical portion of the gourd-shaped container, a ball disposed within the small spherical portion of the gourd-shaped container and connected with a lower end of the screw via a chain, a circular seat arranged with a bottom of the large spherical portion of the gourd-shaped container, a magnet fitted in the circular seat, a protective rod fixedly mounted on the platform of the bracket, and an antenna connected

Abstract: An antenna protecting device for motor vehicles including a triangular base having a cavity at an inner bottom thereof, a spherical container having a neck portion rotatably connected with the triangular base and provided at a bottom with a spring-loaded ball, a bracket extending upwardly from the spherical container and having a platform at an upper end, a hemispherical seat engaged with a lower portion of the spherical container and having an orifice which is smaller than the ball in diameter, a protective rod partly inserted in the spherical container through the bracket, and an antenna connected with the platform of the bracket.

Abstract: A capacitively coupled high frequency broad-band antenna comprising a stub having a tubularly shaped lower end that is capacitively coupled to a first terminal element for the center conductor of a transmission line. The outer conductor of the transmission line is connected to a base support element which is accurately spaced from the first terminal element by a dielectric spacer element; and the three elements are encapsulated and hermetically sealed by a plastic molded housing.

Abstract: An antenna apparatus for a hand-held symbology reader device having a housing and an elongated one-quarter wavelength antenna. A rotatable coupling member has an L-shaped conductor fixedly and electrically coupled to the antenna by a first end thereof. A second end of the L-shaped conductor is rotatably received by the housing. A ground plane of an electrically conductive material, having a plastic film coated thereon, is positioned within the housing. A washer of an electrically conductive material is electrically coupled to the second end of the L-shaped conductor, and is positioned in face-to-face juxtaposition with a portion of the ground plane. The washer and the portion of the ground plane form a parallel plate capacitor, with the plastic film forming a dielectric therebetween to capacitively couple the ground plane to the antenna.

Abstract: A mobile communication antenna adjustably mounted to a base at desired angular orientations. A decorative cover snap locks to the base to cover the antenna base structure. The cover includes a small opening through which a portion of an articulating arm extends to provide a wide range of angle adjustments of the antenna within the opening in the cover. The articulating arm provides an offset between the antenna axis and the axis of pivotal movement.

Abstract: A cover for the base element of a magnetically mounted vehicle antenna in the form of a bag having a closure is provided to protect the finish of a vehicle's surface from blemishes due to repeated removal or placement of the magnetic mount and movement caused by high vehicular speeds. Various types of closure are provided for the cover bag such as a snap, zipper, hook and loop fastener, elastic banding, drawstring or combinations thereof. The cover may be made from cloth or a leathery material or a combination thereof. The cover bag may be colored for aesthetic and/or protective reasons.

Abstract: A free standing antenna for use in associations with high-stress environments subjecting the antenna to extremes of flexing stress and temperature stress and chemical stress, the antenna having a mounting base portion which can be secured to a base adjacent to the high-stress environment, the base member being formed of glass fibre reinforced resin materials containing fibres extending in a longitudinal direction, along the axis of the base, and further fibres running in a generally annular fashion in planes generally transverse to the axis, and the base member further defining a fastening flange, a plurality of fastening holes formed in the flange, a generally tapering neck portion extending upwardly from the fastening flange, and a generally cylindrical junction head extending upwardly from the neck, the head and the neck being located along a common central axis, and an antenna column secured to the cylindrical head, the column being formed of hollow tubular metal defining outer and inner wall surfaces, an

Abstract: A whip antenna for vehicles including an antenna element with a skirt-form coupling member provided on the antenna element. The coupling member is, at a predetermined point on the antenna, prevented from moving toward the lower end of the antenna and has a screw thread on its inner surface. The lower end of the antenna is inserted into an antenna attachment base installed in a vehicle body, and the coupling member is screwed to this antenna attachment base.

Abstract: A phased array monopole antenna has a single layer membrane upon which a plurality of antenna units are attached. Each antenna unit has a flexible curved antenna blade which bends over or springs up when the membrane is rolled or unrolled on a drum.

Abstract: A whip-tilt adapter allows a whip antenna designed for use over the 2-30 MHz frequency band known as the high frequency (HF) radio band that is normally vertically polarized to be horizontally polarized for use in near vertical incidence skywave (NVIS) communication. The adapter has a vertical shaft for connection to an antenna mount or a bottom section of the antenna, a near-horizontal member having a port to connect to the antenna, and optionally a vertical port for an antenna connection. The adapter can be made to mate with any whip and whip base.

Abstract: An antenna mount is shown for mounting an antenna whip on a support surface. The mount includes a first adapter for receiving and coupling the antenna whip to the mount and a second adapter for receiving and coupling the lead-in conductor to the mount. A coil spring is located intermediate and serves as the electrical connection between the first and second adapters. A one-piece elastomeric body is molded about the spring with the adapters being exposed for connection to the antenna whip and lead-in conductor.

Abstract: A portable antenna is provided for mounting on a motor vehicle's side window and enabling easy and rapid mounting and removal. The portable antenna includes a base member with a current-fed radiator carried by the base member and having a first portion for location on the inside of the side window, a second contiguous portion for overlying the side window and a third portion, contiguous with the second portion, for location outside of the side window with a distal end thereof extending upwardly when in use. A field-canceling conductor is carried by the base portion for location on the inside of the side window. A coaxial cable has its main conductor connected to a proximal end portion of the current-fed radiator and has a ground conductor connected to the field-canceling member. The current-fed radiator is dimensioned so that the second portion thereof is a relatively low impedance area.

Abstract: An automotive vehicle antenna comprises an outer cover having a cross section elongated in the direction of travel of the vehicle. The cover, which includes an enlarged section covering a loading coil, strengthens the antenna against bending due to wind force and presents a low wind resistance profile. The antenna may be window mounted and is provided with a conductive base engaging a conductive pivot support. The antenna may be pivoted to a flattened position to avoid damage by objects such as may be encountered in an automatic carwash. The antenna may be adjusted to a precise upright position for optimum reception and is adapted to return to a previously adjusted position when it is returned to the upright position from a flattened position.

Abstract: An adjustable cellular mobile antenna assembly capable of being mounted on a vehicle in which the angular orientation of the antenna whip or radiator is adjustable relative to the surface on which it is mounted. The antenna member of an adjustable antenna includes a whip or radiator and a support portion. The support portion includes a bottom member, suitably shaped to be receivable in a base attached to the vehicle. The antenna member is angularly adjustable relative to the base and is retained in such a selectable position by a retaining member adapted to engage and interact with both the antenna member and the base and to retain the antenna member in the angular position selected. The antenna assembly is designed to receive and connect to a cable to provide an uninterrupted electrical connection between a transceiver and the antenna whip over all of its angular positions.

Abstract: A whip-tilt adapter allows a whip antenna that is normally vertically polarized to be horizontally polarized for use in near vertical incidence skyway communication. The adapter has a vertical shaft for connection to an antenna mount or a bottom section of the antenna, a near-horizontal member having a port to connect to the antenna, and optionally a vertical port for an antenna connection.

Abstract: A screw type coupling device includidng a male screw element formed by installing a coil spring form helical component on the outer surface of a columnar element and a female screw element formed by installing a coil spring form helical component in a tubular element so that the two helical components are screw engaged with each other. With the application of such coupling device to an antenna for vehicles, the antenna having the male screw element at the base is removably attached to a vehicle body by screwing the male screw element of the antenna to the female screw element installed in the vehicle body.

Abstract: An apparatus for mounting an antenna at the upper end of a mast. The antenna has a first electrical connector extending downward from its lower end. The mast has a second electrical connector extending upward from its upper end and is interengageable with the first connector. The apparatus comprises a head moveably adjustable on the upper end of the mast. The head has a skirt surrounding the mast and an upper surface. The upper surface has an opening therein dimensioned for passage of the connectors. The head is movable downwardly on the upper end of the mast to a lowered retracted position and movable upwardly on the upper end of the mast to a raised extended position. When the head is in its retracted position the second connector extends up through the opening above the upper surface for connection of the connectors.

Abstract: An antenna mounting for mobile and portable radios with an antenna element which can be quickly and easily removed, replaced, or secured in selectable positions manually without hand tools. The antenna is received and supported by a manually rotatable setscrew which engages a complementary threaded opening in a selectively positionable arm assembly. The arm assembly is pivotally attached to a fixed vertical support perpendicular to the antenna mounting base. The pivoted arm allows the antenna setscrew's bottom tip to be selectively positioned and secured relative to indentations along the arcuate surface of a semicircular shaped structure on the vertical support. The antenna may be physically removed for safekeeping by reversing the aforementioned procedure.

Abstract: A portable antenna is provided for mounting on a motor vehicle's side window and enabling easy and rapid mounting and removal. The portable antenna includes an outer RF transfer member, a current-fed radiator connected to the outer RF transfer member, an inner RF transfer member, a field-cancelling member operative to cancel the electromagnetic field in the plane of the field-cancelling member, and a pair of generally parallel wire members pivotally connecting the outer transfer member to the inner transfer member and bridging the inner and outer transfer members so as to overlie the side window when the antenna is mounted thereon.

Abstract: For a vehicle which sometimes requires two-way radio communications but which sometimes requires an ordinary appearance, for example an unmarked law enforcement vehicle which could be compromised by the conspicuousness of a conventional communications antenna and associated external mounting hardware, this antenna system provides an external antenna rod which is readily deployable and removable from within the vehicle. The novel mounting hardware is highly inconspicuous since its exposed area is very small and is made flush with the surrounding vehicle body surface. In the mounting assembly, an insulated bushing, carrying a socket having a contact sleeve, has a small aperture in line with the contact sleeve, forming a passageway through the vehicle body through which the external antenna rod may be deployed. Alternatively, an internal antenna rod may be readily deployed in the same mounting assembly to project inwardly, enabling covert limited range communications.

Abstract: A base loaded antenna is provided, which securely holds the inductive loading coil of the antenna while minimizing capacitive coupling of adjacent coil turns. A coil support has fins with grooves that hold the coil, so most of the space between adjacent coil turns contains only air. A cover surrounds the coil, and the coil support is loaded in tension while the cover is loaded in corresponding compression. A base on which the coil support and cover are mounted, is held to a vehicle sheet metal body by a star plate that lies on the underside of the sheet metal. The star plate has bent-up peripheral portions that "dig" into the sheet metal to make an electrical ground connection therewith, and a flat middle for making electrical and mechanical connections to outer coaxial conductors.

Abstract: An insulative housing has a first recess provided with a threaded metal insert adapted to engage a threaded antenna mount on a vehicle. A second relatively smaller recess through which an antenna whip extends has a compression spring which, when the antenna is installed on the vehicle, urges the contact at the lower end of the whip into secure electrical contact with the contact on the mount and also operates to compress a weather seal about the whip at the upper end of the recess.

Abstract: An antenna construction having a whip supporting sleeve with a depending support pin that is received in a socket in an antenna support sleeve, and with an insulator in the socket electrically separating the support pin from the support sleeve but providing a predetermined capacitance therebetween. The insulator rigidly connects the support pin to the support sleeve to resist lateral loads on the whip in a manner preventing cracking of the insulator. The antenna includes a structural inductance in parallel with the built in pin-socket capacitance to allow a shorter whip at resonance than the prior art base loaded antenna.

Abstract: Antenna mounting structure to mount an elongated communications antenna to a fender. A signal carrying cable is routed from a radio to an opening in the vehicle body. A cable retaining collar slips over the cable and is held in place by an insulating mounting nut. An exposed conductor is then coupled to an antenna base by a metal lock nut that slips over a spherical antenna base. As the lock nut is tightened, the orientation of the antenna is fixed.

Abstract: A portable antenna is provided for mounting on a motor vehicle's side window and enabling easy and rapid mounting and removal. The portable antenna includes an outer RF transfer member, a current-fed radiator connected to the outer RF transfer member, an inner RF transfer member, a field-cancelling member operative to cancel the electromagnetic field in the plane of the field-cancelling member, and a pair of generally parallel wire members pivotally connecting the outer transfer member to the inner transfer member and bridging the inner and outer transfer members so as to overlie the side window when the antenna is mounted thereon.

Abstract: A heavy duty aerial mounting base which is structurally resilient and electrically insulated. There is a solid inner core and a weathershielding outer core integrally formed with the inner core. The inner and outer cores are concentric and are formed with a space between them. The outer core tapers inwardly and upwardly at one end until it meets the inner core. There are reinforcing ribs in the space between the inner and outer cores.

Abstract: A short, resonant top-loaded helical coil antenna having a flexible lower section is attached to one side of the housing of a receiver unit. The antenna is approximately eight inches in length, and extends outwardly from the receiver unit at an angle of about 30.degree. from vertical, so as to maintain a minimum spacing from the dog's neck.

Abstract: This application discloses an improved citizens band radio coaxial antenna mount, featuring a vertical leg for connecting with a whip antenna and a connected internal core extending to near the bottom, and a hollow horizontal leg having exterior connection means for a coaxial connector leading to the radio and said horizontal leg including a central core pin and surrounding compressable spring, serving to control contact of central core elements to complete the connection.

Abstract: A removable rod antenna comprises a first fitting for rigidly coupling to a radio body; an elongate rod-like antenna body; a second fitting of complementary configuration for engaging the first fitting, and a retaining arrangement for holding the second fitting in captive relation on the antenna. Respective mating fastener portions are defined respectively on the first and second fittings for removably engaging each other in electrically conductive contact to thereby removably mount the antenna body to the radio body in electrically conductive contact with the first fitting thereon.

Abstract: A low cost antenna mount is disclosed for mechanically securing an antenna to an electronic device and simultaneously providing assurance of good electrical contact with the input circuitry of the device. An antenna base (1) with a machined groove (2) is inserted through a hole (4) in a molded plastic antenna housing (5). An integral electrical contact and cam follower (7) is secured to the interior of the antenna housing (5). A cam (15) is used for moving the integral electrical contact (7) and cam follower (7) into mechanical and electrical contact with the antenna base (1). The cam follower (7) is formed from a single strip of spring metal and is bent at three places to form a guide (6) for receiving the antenna base (1) as it is inserted into the hole (4) in the antenna mount. The cam follower (7) is biased to follow the inclined surface of the cam (15) as it is rotated to securely lock the antenna base (1) in place and simultaneously make good electrical contact therewith.

Abstract: A payload-carrying projectile 1 includes a sensor 16 and a sensor carrier 15 disposed in a launch-resistant manner in a recess 14 in the tail section 11 of the projectile 1. After impact of the projectile, which is stabilized by extendable vanes 12, in the target area, where it may penetrate the ground as necessary, the object is to deploy the sensor from its protected position inside the projectile 1and to place it as high as possible above the surface of the ground. For this purpose, the sensor 16 is connected with a concertina bellows 15 which for its part leads into a reservoir 13a which is disposed in the projectile, and which is filled with polyurethane foam mixed with a propellant gas under high pressure. The connection of the reservoir 13 with the concertina bellows 15 is made via a valve 13c which is regulated by an electronic control element 13a containing, for instance, a timer switch.

Abstract: When a portable communication equipment such as a cellular telephone is carried inside an automotive vehicle, there is a need for its antenna to be supported exterior to the vehicle frame but at the same time be easily detachable from the vehicle.The invention provides a mounting clamp assembly for removably supporting an antenna on the exterior side of a vehicle window, and includes circuit means extending over the top of the window for sending signals between the antenna and the equipment. The mounting clamp assembly is easily attached to or removed from the window and its operation does not interfere with either the operation of the electrical circuit or the opening or closing of the window.

Abstract: A slewing assembly comprises a cylindrical main body and a shackle member, it is characterized that the cylindrical main body includes a pedestal-like member with a terminal to be connected to a radio set or the like and a hollowed cylindrical section for rotatably receiving the shackle member; the shackle member comprises a forked portion containing a slot and a screw hole for pivotally securing an extensile rod antenna or the like and a hollowed cylindrical section to be rotatably received in the hollowed section of the main body, a plurality of grooves surrounding the outer surface thereof are provided for lubricating purpose, one slit extends axially on the entire outer surface of the same, the other one slit extends more than a hemicircumference around the outer surface of the same at the end abutting against the flange of the forked portion, said two slits intersect at right angle to form an integral cross slit so that the hollowed cylindrical section of the shackle member is contractable and expandable

Abstract: A mounting structure for mounting an automobile antenna, shaft, mirror or other device within a hole in a support surface such as a fender, at various angles to such support surface, comprises a base which partially passes through the hole, a device-supporting bushing which partially passes through the base, a clamping nut above, and a retainer below, the support surface. The bushing has engagement means above the support surface to mate with the clamping nut and stop means below the support surface against which the retainer pivots and bears. The base has a central aperture receiving the bushing, which can swing through various angles. A spherical upper bearing surface on the base mates with the clamping nut, and includes a flange bearing against the upper support surface. A toothed lower surface and a pair of legs extend downwardly from the base and have inner surfaces parallel to a given plane.

Abstract: A high-precision injection-molded form for an inductance coil comprises a cylindrical core formed of a solid mass of plastic or similar material which has a surface of relatively low dimensional precision. A thin plastic layer molded over the surface of the core provides a high precision surface including helical grooves in which the windings of the coil are seated.

Abstract: Disclosed is a car antenna system which comprises a substantially cylindrical mounting base having a conductor fitted therein and penetrating a car body wall, a mounting member shifted along the mounting base and fixed, a fixing means formed of an insulating material shifted by the mounting member to fix the mounting base to the car body wall, a rod antenna element attached to the outside end of a conductive part of the mounting base, and a loading coil located inside the car body wall and connected between the conductive part and a cable led to a CB-wave transmitter-receiver whereby, the capacitance between the car body wall and the conductive part being lower as compared with a case in which the mounting member is not included.

Abstract: A mobile antenna adapted to be mounted to a motor vehicle includes a vertical radiating element, an antenna base from which the radiating element extends, and a cylindrical mounting pin for mounting the base to a body panel of the vehicle. The mounting pin establishes at one end a first quick-release bayonet-type connection to the antenna base, and a second quick-release bayonet-type connection to a skirt member positioned between the base and the body panel. The base includes a socket for receiving the pin, and a contact member within the socket which engages tabs contained on a first electrically conductive end cap molded into the pin housing to mechanically and electrically connect the pin to the base. The other end of the pin includes a second electrically-conductive end cap which receives a coaxial cable and establishes an electrical connection between the shield of the cable and the inside surface of the body panel.

Abstract: An angularly adjustable antenna mounting assembly for mounting a mobile antenna to the exterior surface of a motor vehicle includes a semi-hemispherical mounting shell. The antenna base is secured to the exterior surface of the shell by a pin member which extends through the shell and is retained therein by a retaining plate biased against the interior surface of the shell. The antenna is connected to the other end of the pin member by a quick-release bayonet connection which also serves to establish electrical connection to the antenna. The mounting angle of the antenna is adjusted by adjusting the location of the bridging plate within the shell.

Abstract: An automobile antenna mounting structure comprises a base supporting and electrically insulating an antenna mast, the base extending through a bore of laterally elongated cross-section in a lower mounting plate, a circular mounting aperture in a mounting surface, and a bore of laterally elongated cross-section in an upper mounting means, respectively. A pair of downwardly concave shouldered portions on the base support a pair of downwardly depending legs on the lower mounting plate, so formed to permit limited relative pivotal movement between the base and plate in a vertical plane. The base and lower mounting plate are further formed to be both insertable through the mounting aperture in the support surface from the exterior thereof. The lower mounting plate and upper mounting means are adapted to be clamped to the support surface by a nut threaded on the upper portion of the base.

Abstract: A precision injection-molded form for an inductance coil comprises a cylindrical core member having a surface of relatively low dimensional precision, and a thin plastic layer molded over the surface to provide a surface of high dimensional precision for supporting the windings of the coil. Metal insert-members having threaded axial bores and radially extending wing portions are provided at either end of the core to establish electrical contact with the winding and a mounting capability for the assembly. The coil form is formed by injection molding techniques and apparatus which provide for axial compression of the assembly prior to molding to obtain a predetermined longitudinal dimension, and for equalization of forces exerted during molding to prevent longitudinal deformation.

Abstract: A support structure is disclosed for mounting a mobile antenna to a support plate and for connecting the antenna to a coaxial cable. The structure includes an electrically conductive nut adapted for mounting on the support plate, a dielectric cap to receive and house the nut and clamping means disposed between the nut and cap. The nut, cap and clamping means each has a central bore or passage to accommodate the cable. The clamping means is also constructed such that its frictional engagement with the cap is less than its frictional engagement with the nut, such that as the cap is threaded over the clamping means and nut, the clamping means remains generally stationary relative to the nut.

Abstract: The invention is a two-ended fastener having one end suitable for attaching the fastener to a base with a second end having a special thread that is substantially cylindrical at its root and sharp at its crown. This thread is designed to mate with the radially inward surfaces of a round wire helical spring so that the helical spring may simply be threaded to the fastener. By utilizing the special thread described, a high degree of surface contact between the fastener and the spring is made possible, increasing spring retention. The special thread inner diameter may be made slightly larger than the interior diameter of the spring so that the helical spring will be slightly expanded when threaded to the fastener. An elastic force between the threaded portion of the spring and the fastener further helps retain the spring to the fastener. This elastic force increases as an attempt is made to unthread the spring from the fastener.