Abstract: An extension arm apparatus is provided for mounting devices such as flat panel monitors above a workspace. The apparatus includes upper and lower channels connected to a pair of endcaps. One endcap may connect to the workspace and the other endcap may connect to an extension arm or to the device to be mounted. At least one of the channels includes a reinforcement structure providing additional support to the apparatus. The reinforcement structure is tapered. A forearm extension may also include a reinforcement structure. The endcaps may have interior spacers that provide clearance for the sidewalls of the channels, which may be fabricated without parting lines.

Abstract: The present invention pertains to extension arm apparatuses that are adapted to support user devices throughout a range of positions. A given apparatus may include one or more arms that position the user device remotely from a support position. An extension and retraction device such as a gas cylinder is received within each arm, and provides a force to support the user device as the arm is placed into a given position. A variable force clevis is connected to the extension/retraction device within the arm. The variable force clevis is connected to a pair of locations in the arm as well. As the arm moves, for instance up or down, the variable force clevis rotates within the arm and dynamically adjusts the force provided by the extension/retraction device. Thus, the arm may be positioned as desired, as such force adjustment stabilizes the arm.

Abstract: A positionable support device employs a motion restriction device retrofitted to an existing spring cylinder to adjust the amount of force exerted. In one embodiment, split ring is pressed against an actuating shaft of the spring cylinder with adjustable force. The force on the split ring causes frictional resistance to the motion of the shaft thereby reducing the force applied. This is useful in spring-loaded positioners which allow the object to be placed, and remain in a selected position. The spring cylinder may be gas-charged or spring-loaded support. Various types of friction adjustment units may be employed to result in a positionable support device which holds an object in a desired position.

Abstract: The present invention pertains to extension arm apparatuses that are adapted to support user devices throughout a range of positions. A given apparatus may include one or more arms that position the user device remotely from a support position. An extension and retraction device such as a gas cylinder is received within each arm, and provides a force to support the user device as the arm is placed into a given position. A variable force clevis is connected to the extension/retraction device within the arm. The variable force clevis is connected to a pair of locations in the arm as well. As the arm moves, for instance up or down, the variable force clevis rotates within the arm and dynamically adjusts the force provided by the extension/retraction device. Thus, the arm may be positioned as desired, as such force adjustment stabilizes the arm.

Abstract: An extension arm apparatus is provided for mounting devices such as flat panel monitors above a workspace. The apparatus includes upper and lower channels connected to a pair of endcaps. One endcap may connect to the workspace and the other endcap may connect to an extension arm or to the device to be mounted. At least one of the channels includes a reinforcement structure providing additional support to the apparatus. The reinforcement structure is tapered. A forearm extension may also include a reinforcement structure. The endcaps may have interior spacers that provide clearance for the sidewalls of the channels, which may be fabricated without parting lines.

Abstract: The present invention pertains to extension arm apparatuses that are adapted to support user devices throughout a range of positions. A given apparatus may include one or more arms that position the user device remotely from a support position. An extension and retraction device such as a gas cylinder is received within each arm, and provides a force to support the user device as the arm is placed into a given position. A variable force clevis is connected to the extension/retraction device within the arm. The variable force clevis is connected to a pair of locations in the arm as well. As the arm moves, for instance up or down, the variable force clevis rotates within the arm and dynamically adjusts the force provided by the extension/retraction device. Thus, the arm may be positioned as desired, as such force adjustment stabilizes the arm.

Abstract: An extension arm apparatus is provided for mounting devices such as flat panel monitors above a workspace. The apparatus includes upper and lower channels connected to a pair of endcaps. One endcap may connect to the workspace and the other endcap may connect to an extension arm or the to device to be mounted. At least one of the channels includes a reinforcement structure providing additional support to the apparatus. The reinforcement structure is tapered. A forearm extension may also include a reinforcement structure. The endcaps may have interior spacers that provide clearance for the sidewalls of the channels, which may be fabricated without parting lines.

Abstract: The present invention pertains to extension arm apparatuses that are adapted to support user devices throughout a range of positions. A given apparatus may include one or more arms that position the user device remotely from a support position. An extension and retraction device such as a gas cylinder is received within each arm, and provides a force to support the user device as the arm is placed into a given position. A variable force clevis is connected to the extension/retraction device within the arm. The variable force clevis is connected to a pair of locations in the arm as well. As the arm moves, for instance up or down, the variable force clevis rotates within the arm and dynamically adjusts the force provided by the extension/retraction device. Removable and/or pivotable covers are provided for managing cables of the user device attached to the extension arm.

Abstract: A display arm having an elongated outer housing, an elongated inner housing telescopically engaged within the outer housing, a biasing member coupled with the outer housing and operative to counter-balance the inner housing within the outer housing, and a locking mechanism for locking the position of the inner housing relative to the outer housing. The locking mechanism may include a first locking vane and a second locking vane, each locking vane having a sloped surface abutting an edge of the inner housing and a second surface abutting an interior surface of the outer housing, wherein the sloped surfaces initiate spreading of the locking vanes when the locking vanes are pulled into an extended position by the locking mechanism such that the second surfaces engage the interior surface of the outer housing with sufficient force to prevent movement of the inner housing relative to the outer housing.

Abstract: A mounting bracket and insert for use in mounting mountable devices to a mounting pole including a first section and a second section, each of said first and second sections having a concave surface, each concave surface having at least a one longitudinally extended groove, the first and second sections being joinable to one another, with such joining forming a cylindrical area between the first and second sections, said cylindrical area formed by said concave surfaces, and at least a pair of inserts, each insert having a convex surface sized to fit within the concave surface of one of the two sections, the convex surface of each insert having at least one protrusion aligned along the longitudinal axis of the insert and shaped to fit into at least one groove of the concave surfaces of the sections is described.

Abstract: A tilter assembly for an electronic device such as a liquid crystal display includes a swivel bolt having an opening at one end thereof, a swivel lug having one end pivotably attached to the swivel bolt within the opening, and an adapter having an opening within which the other end of the swivel lug is secured. The tilter assembly is attachable to an adjustable extension arm which is mounted to a supporting surface for positional manipulation of the electronic device.

Abstract: An electrical enclosure having a base, a cover, and hinge pivotally connecting the base and cover. The cover has a pair of ears, each provided with a key hole for receiving hinge pins mounted on the base. The pivot pins are provided with keys that align with notch portions of the key holes when the cover is disposed at an obtuse angle, preferably about 180.degree. with respect to the base. After assembly, the base is connected to a support which limits the range of pivotal movement of the cover to an angle less than 180.degree. so that the keys and notch portions can no longer be aligned. The base and cover have top, bottom and two side walls of substantially the same depth and the cover bottom wall has two cord receiving recesses extending inwardly about one-half the depth of the bottom wall to minimize the radius of bending of the cords inside the enclosure and minimize the size of the recesses.

Abstract: An electrical enclosure having a base, a cover, and hinge pivotally connecting the base and cover. The cover has a pair of ears, each provided with a key hole for receiving hinge pins mounted on the base. The pivot pins are provided with keys that align with notch portions of the key holes when the cover is disposed at an obtuse angle, preferably about 180.degree. with respect to the base. After assembly, the base is connected to a support which limits the range of pivotal movement of the cover to an angle less than 180.degree. so that the keys and notch portions can no longer be aligned. The base and cover have top, bottom and two side walls of substantially the same depth and the cover bottom wall has two cord receiving recesses extending inwardly about one-half the depth of the bottom wall to minimize the radius of bending of the cords inside the enclosure and minimize the size of the recesses.

Abstract: An electrical enclosure having a base, a cover, and hinge pivotally connecting the base and cover. The cover has a pair of ears, each provided with a key hole for receiving hinge pins mounted on the base. The pivot pins are provided with keys that align with notch portions of the key holes when the cover is disposed at an obtuse angle, preferably about 180.degree. with respect to the base. After assembly, the base is connected to a support which limits the range of pivotal movement of the cover to an angle less than 180.degree. so that the keys and notch portions can no longer be aligned.

Abstract: A self-closing lid is provided for a cover for a wiring device box. The cover has openings to provide access to a receptacle within the box. Each lid is formed with laterally protruding collinear gudgeons which are received in shell-like bearing members molded onto the cover. The lid and cover are each provided with a boss between which a compression coiled spring acts. The line of action of the spring is outside of the axis ine of the gugeons, causing the spring to continually urge the lid to its closed position.

Abstract: A tapped hole produced in a metallic material by threading a preselected standard threaded fastener into an untapped hole formed in the material. The diameter of the hole to be formed is determined by using a formula that takes into account the hardness and thickness of the material to be tapped and the basic major diameter and pitch of the preselected threaded fastener to be used to tap the hole. This formula can only be used with threaded fasteners having threads of the Unified Thread Standard type. This formula is particularly useful in tapping a hole formed in a mounting strap of an electrical wiring device.

Abstract: A tapped hole produced in a metallic material by threading a preselected standard threaded fastener into an untapped hole formed in the material. The diameter of the hole to be formed is determined by using a formula that takes into account the hardness and thickness of the material to be tapped and the basic major diameter and pitch of the preselected threaded fastener to be used to tap the hole. This formula can only be used with threaded fasteners having threads of the Unified Thread Standard type. This formula is particularly useful in tapping a hole formed in a mounting strap of an electrical wiring device.

Abstract: An electrical outlet box formed of metallic material has an integral boss that angularly aligns, engages and retains wiring device mounting screws. The boss has a bore for receiving the screw comprising in sequence a cylindrical surface having a diameter slightly larger than the crest diameter of the mounting screw threads, and a self-tapping surface defining generally a regular hexagon in transverse cross section. The hexagon has a diameter across its corners slightly larger than the crest diameter of the screw threads, and a diameter across its flat sides slightly larger than the root diameter of the screw threads and slightly smaller than the crest diameter of the screw threads. A slot extends laterally from the bore and into the boss.

Abstract: The gasket for forming a weather resistant seal between a lamp and a lampholder having a socket therein, said gasket comprising a circular ring of flexible water resistant material and having a preformed section therein for mounting the gasket around the exterior of a lampholder and connecting said preformed section to a lip in the lampholder, said gasket also including a reduced cross-sectional area in the portion adjacent the lamp such that the reduced cross-sectional area readily provides a flexible member adjacent the lamp for forming a weather resistant seal.