Abstract: A type of "improvement on microphone stand elevating device", comprising a base stand, an outer tube, an inner tube and a fixing joint; the outer tube is installed on the base stand; the inner tube is installed on the outer tube, with its top to accommodate the microphone piece, characterized in that: a fixing joint, comprising a main body, a fixing block and a pressing lever; the main body has a through hole to enable its mounting on top of the outer tube; one side of the main body has a depressed chamber; on the depressed chamber is an open hole communicating with the through hole; a fixing block, its front end is a pushing part; said pushing part corresponds to the open hole in the depressed chamber, its front slightly extending to the through hole, so the fixing block may be fitted onto the open hole; a pressing lever, its center part is hinge joined to the center part of the depressed chamber; between the bottom part of said pressing lever and the depressed chamber is a compressed spring; so the front pa

Abstract: A lift table includes a support table assembly mounted on a scissor arm mechanism. The support table assembly is raised and lowered automatically upon the imposition or removal of loads so that the height of the plane on which articles are being handled remains generally constant. Raising and lowering is effected via a lift spring assembly that acts without the assistance of any pneumatic or hydraulic actuators. The scissor arm mechanism of the lift table has angled arms and low-friction rollers to facilitate raising and lowering of the support table assembly and optimizing operation of the lift spring assembly. The resulting mechanically operated lift table is simple, reliable, and can be easily transported from location to location.

Abstract: Clipboards for holding paper are attached to a computer keyboard via arm bases and a detachable clipboard structure such that the clipboards can also be used as a dustcover for said computer keyboard. The said clipboards are adjustable to provide multiple viewing positions for the computer keyboard user while using little desk space.