Abstract: A device for holding rod-shaped workpieces, especially test tubes, has a base plate spaced at a distance from a support surface. A receiving and clamping device has at least two elastic tongues that are displaceable in the plane of the base plate. The tongues are positioned in a perforation of the base plate and act in pairs on the test tube. The holding device is extremely simple in its design and economical to manufacture, but ensures a reliable securing of the test tube at different levels.

Abstract: A device for holding rod-shaped workpieces, especially test tubes, has a base plate spaced at a distance from a support surface. A receiving and clamping device has at least two elastic tongues that are displaceable in the plane of the base plate. The tongues are positioned in a perforation of the base plate and act in pairs on the test tube. The holding device is extremely simple in its design and economical to manufacture, but ensures a reliable securing of the test tube at different levels.

Abstract: A brush holder mechanism for electric motors, especially the fractional horsepower commutator-equipped motors of workshop power tools. In order to prevent failure of the tool due to jamming of the carbon brushes in their holders, the brush holder according to the invention provides that the brush holder casing in which the carbon brush moves has smooth, flat and uninterrupted interior surfaces and the casing is constructed of a single piece of metal or a single piece of metal on which a continuous cover plate is attached. The integral construction of the casing insures that the casing is not deformed during manufacture or assembly, in particular by the bending of parts of the casing into fastening tabs and the like. In the brush holder according to the invention, the fastening means are integral with the cover plate or the casing. In other embodiments, the casing is held in a receiver by clamps and screws.

Abstract: An improved manually actuated liquid-atomizing pump assembly for non-pressurized pharmaceutical atomizers comprising a pump actuator unit and a pump unit, which causes a spray of substantially the same particle size spectrum to be discharged from the atomizer nozzle with each actuation of the pump; the improvement resides in a resilient mechanical resistance interposed between the manual pump actuator and the pump, where the resilient resistance requires a very definite amount of force to be overcome.