Abstract: A round or oval powder drum is disclosed which comprises a spirally wrapped paper construction body closed at both ends and sealed to prevent leakage of contained, dry fine powders.

Abstract: High temperature resistant tubes are described, which are useful as heat insulators for thermocouples. The tubes are made of spirally wound, refractory cements reinforced with non-woven webs of ceramic fibers. The tubes are advantageous in that by the method of their manufacture, they are free of significant proportions of organic binders and adhesives which may be volatilized at high temperatures, releasing gases.

Abstract: The disclosure is of a tamper-proof tubular container, which comprises: a tubular body including a detachable or removable body wall portion contiguous with one end, a plug for the opposite end and a removable closure member mounted on the inner surface of the removable portion. Frangible means permits detachment of the removable portion. The closure member has a threaded portion in contact with the inner surface of the tubular wall, to facilitate removal and replacement of the closure member. The container of the invention is particularly advantageous in that it is lightweight, tamper-proof, secure after opening and replacement of the closure member and is easier to employ for multiple opening and reclosures. The disclosure is also of a self-threading closure member for use in association with tubular-type containers.

Abstract: Disclosure is made of a universally fitting electrical insulator for mounting between the armature shaft and the windings and laminations of an armature. The disclosure is also of a method for mounting the insulator in the armature. The insulator and method are particularly useful in the production of double insulated electrical hand tools.

Abstract: Disclosure is made of a novel sheath and the method of its use for protecting electrical conductors and connections. The sheath comprises a tubular body which defines an interior space. The space contains an expandable, synthetic, polymeric resin foam forming composition. The method of the invention comprises inserting an electrical conductor or connection into the sheath of the invention and activating the foam forming composition to foam and encapsulate the conductor or connection. The installed sheaths protect the conductors and/or connections from degradation by environmental conditions, are resilient and improve the insulative quality of the electrical connection.