B-Line Systems, Inc.

Sigma-Aldrich Gmbh

Martin L Witherbee

Eric R Rinderer

A cable tray system comprising a cable tray for carrying cable, a support fastened to the cable tray, and at least one cover panel operatively associated with the support for covering cable carried by the cable tray. The cover panel is engageable with the support for pivoting about an axis generally parallel to a longitudinal axis of the cable tray between an open position in which the cover panel is swung up and away from the cable tray to permit access to cables in the tray and a closed position in which the cover panel is swung down to cover cables in the cable tray. The cover panel is removable from the support without removing the support from the cable tray.

Cable tray cover system

A bracket for mounting an electrical box on a wall stud including a sheet metal plate having front and rear faces and a large central opening therein. A pair of screw opening formations is provided in the plate generally adjacent diagonally opposite corners of the central opening in the plate. Each formation includes a relatively narrow screw shank clearance slot which receives the shank of a respective box mounting screw. The plate is so configured that an electrical box may be moved to a first position in which the front of the box is closely adjacent the rear face of the plate, and then to a second position in which the shanks of the mounting screws are received in the screw shank clearance slots of respective screw opening formations and in which the front opening of the box is generally in register with the central opening in the plate. A locking device on the bracket prevents movement of the box from its second position back to its the first position for locking the box in its the second position and holding the box captive on the mounting bracket without the need to tighten the box mounting screws.

Electrical box mounting bracket

A hold-down device for holding a cable tray on a support includes a rigid member having opposite side edges, opposite side margins adjacent respective side edges, and opposite end portions. The member may be placed on the support in a position in which the opposite side margins of the member bear on edges of the support with the member overlying the slot adjacent a flange of the cable tray. The member is constructed and arranged such that it is selectively securable to the support by a threaded fastener either in a clamping position in which one end portion of the member overlies the flange of the cable tray and may clamp the flange of the cable tray thereby to hold the rail in fixed position with respect to the support, or in a non-clamping position in which the opposite end portion of the member overlies the flange of the cable tray but cannot clamp the flange thereby to permit lengthwise thermal expansion and contraction of the rail while still holding the rail on the support. First and second anti-spin structures are provided at respective end portions of the member engageable with the support to prevent rotation of the member relative to the support as the threaded fastener is rotated to secure the member in its clamping or non-clamping position.

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Edwardsville, IL, United States of America

Martin L Witherbee