Abstract: A fiber optic cable winding tool having a disk-shaped base and a pair of semi-circular spools slidably mounted on the base. The spools are radially adjustable toward and from the central axis of the base by providing the spools on rails connected to and radially extending away from the central axis of the base. Each spool has a fiber optic cable contacting surface with a radius of curvature exceeding a minimum bend radius of the fiber optic cable. A pair of linkage arms connect to each spool and further connect to a slide block spaced from the spools. One of the spools is capable of being retained against the base once the desired diameter of the winding is located. The retained spool, in conjunction with the linkage arms and slide block, prevent the other spool from sliding relative to the base. This way the diameter of the spools can be set and the fiber optic cable may be wound thereon.

Abstract: A fiber optic cable winding tool having a disk-shaped base with a central axis, and four quarter-circle spools. Each spool has a fiber optic cable contacting surface with a radius of curvature exceeding a minimum bend radius of the fiber optic cable. The tool further includes four radial guides connected to the disk-shaped base for slidably mounting the four spools on the disk-shaped base such that the spools are radially adjustable relative to the central axis of the disk-shaped base. A resilient ring inwardly biases the spools on the radial guides towards the central axis of the disk-shaped base. A moveable wedge-shaped disk engages the spools to permit the spools to be radially adjustable relative to the central axis of the disk-shaped base. The radial guides permit the spools to be radially collapsed towards the central axis of the disk-shaped base after winding the fiber optic cable to permit removal of the fiber optic cable from the spools.

Abstract: A fiber optic cable winding tool having concentric upper and lower disk-shaped bases that are rotatable relative to each other. Four quarter-circle spools are slidably mounted on the upper base, and are radially adjustable towards and from the central axis of the upper base via radial slots formed in the lower base. Each spool has a fiber optic cable contacting surface with a radius of curvature exceeding a minimum bend radius of the fiber optic cable. The radial slots communicate with corresponding arcuate slots formed in the lower base, and roller guides are provided through each radial slot and its corresponding arcuate slot and connects to a corresponding spool. When the upper and lower bases are rotated relative to each other, the spools move either towards or away from the central axis of the upper base, enabling a spool a diameter to be set. A thumb screw is also provided to bear against the rear base and maintain the desired diameter setting.

Abstract: A variable inductor includes at most one coil of electrically conductive material and at most two distinct, separately formed portions of magnetic core material positioned to conduct magnetic flux resulting from passage of electrical current through the coil. At least one of the portions of magnetic core material is located at least partially within a space surrounded by the coil and is movable with respect to the coil. A control device is attached to the movable portion of magnetic core material in a manner such that the movable portion can be moved in its entirety, by manipulating the control device, to change the configuration of a gap within the space surrounded by the coil and defined in part by the movable portion, to vary thereby the inductance of the coil.

Abstract: A device for regulating the intensity of light emitted by a lamp includes a core of magnetic material, a first electrical circuit having a primary inductor wrapped around at least a portion of the core of magnetic material, and a second electrical circuit having a secondary inductor wrapped around at least a portion of the core of magnetic material. The first electrical circuit is designed for electrical connection to the lamp, and the primary inductor is arranged in the first electrical circuit in a manner such that a variation in the inductance of the primary inductor will cause a corresponding variation in the intensity of light emitted by the lamp. The second electrical circuit includes a control device (e.g.

Abstract: A device for regulating the intensity of light emitted by a lamp includes a variable inductor configured to surround a portion of the lamp and electrical circuitry arranged to connect electrically the variable inductor to the lamp in a manner such that a variation in the inductance of the variable inductor will cause a corresponding variation in the intensity of light emitted by the lamp while the lamp is electrically connected to the variable inductor.

Abstract: A control circuit is disclosed that can be used to control the light intensity of a fluorescent lamp. A first embodiment of the control circuit includes one variable inductor and a plurality of fixed inductors. A switch is used to connect one of the inductors to the fluorescent lamp in parallel. The intensity of the light output from the lamp is varied either by adjusting the inductance of the variable inductor, or by switching between the fixed inductors. A second embodiment uses a variable capacitor in place of the variable inductor and uses fixed capacitors in place of the fixed inductors.

Abstract: A conveyor roll adapted for mounting on a shaft comprises a pair of opposed roll halves of a resilient material of semi-cylindrical shape, each having a semi-cylindrical recess. A pair of opposed semi-cylindrical metal insert halves are nested and secured within each roll half and have assembly ends projecting axially outward of the roll halves. Each insert half has an elongated semi-cylindrical recess snugly receiving said shaft. Fasteners interconnect the assembly ends of the inserts securing the inserts together upon the shaft and securing the roll halves together.