Abstract: A cylinder lock with a removable plug incorporates a series of spring biased combinating disc tumblers which cooperate with a first key in normal lock operation. An additional, unbiased control tumbler at the end of the plug cooperates with a retention flange associated with the cylinder to retain the plug against removal from the cylinder while permitting rotation of the plug in the cylinder. The control tumbler includes a notch for receipt of the first key as well as a second, plug removal key. The first key acts against one edge of the notch to displace the control tumbler into a position which ensures that the tumbler will remain engaged with the plug retention flange regardless of the orientation of the plug.

Abstract: A continuous business form assembly of a plurality of webs is disclosed. Two webs form a series of envelopes. Other webs form envelope inserts substantially free and loose in the envelopes. The inserts are joined to the assembly through only abbreviated tear tabs which are behind envelope tear strips and joined to insert web attachment strips formed into the envelopes.

Abstract: An ashtray for eliminating emitted smoke is disclosed. The ashtray defines, within its housing, a predetermined, fixed filter region. An air filter is positioned within and confined by the filter region to ensure that substantially all air passes through the filter medium of the air filter.

Abstract: A fuel element in the form of a log made from highly compressed comminuted cellulose waste e.g. wood and paper, having an external layer of aluminum particles all enclosed in a hard protective shell of matted cellulose fibers. In a preferred form the log has a central bore, the walls of which are also coated with aluminum particles. The log upon burning emits great quantities of heat due to the generation of hydrogen.

Abstract: A construction for shielding microwave antennas is disclosed including a plurality of RF reflective modular panels positioned to surround a microwave antenna location. Each modular panel has the surface of at least one side adapted to reflect RF signals away from the antenna location. The construction includes a frame for supporting the panels, and a means for connecting the panels to the frame. In the preferred embodiment, the panels are reflective of RF signals on both sides of the panel, with the side of the panel facing the antenna location reflecting RF signals upward and the side away from the antenna location reflecting signals downward. The preferred embodiment also includes dual inclined-step reflectors to achieve the directional reflection, preferrably prepared with a cross-section defining a plurality of linked Z's.

Abstract: This invention is concerned with improvement in the nutritive value of soybean meal and other oil seed proteinaceous meals for feeding cattle. The improvement is accomplished by treating the meals with a water-soluble zinc salt to provide zinc ions for reaction with the protein. The treatment reduces the rumen digestibility of the protein of the meal and thereby improves its nutritive value.

Abstract: Dry mixes of zinc salts with particulate proteinaceous feeds for ruminants decrease the rumen digestibility of the protein thereby increasing the nutrient value of the feed to the ruminant. The zinc salts are incorporated as powders external to the particles of feed material. The protective action against micro-organism attack on the protein is provided in the rumen. The dry mix feed materials can be used with beef and dairy cattle and sheep.

Abstract: System for protecting machine parts, such as threads, from physical and chemical damage. The parts to be protected are cleaned, coated with a separating agent, and a mold is placed around them. A protective material is inserted in the interspace between the mold and pipe end. The protective material forms a tough, protective jacket. If desired, the mold can later be removed by means of a tear-open element or integrated weak spots. For the protection of pipe interiors, plastic material can be pressed into the end of the pipe such that it seals against the inside lining of the pipe.

Abstract: The invention relates to a melting furnace for vitrifying highly radioactive waste, comprising a melting tank of refractory material and a furnace upper section enclosed by insulation and a steel container. The furnace contains electrodes of ceramic block material for direct heating which comprise part of the wall of the melting tank. Electrical conductors project from the electrodes through the top of the furnace. In order to avoid the danger of the melt flowing into the gaps between the electrodes and the surrounding tank wall and shorting the electrodes, the melt level is maintained below the top surface of the electrodes. In one form of the invention, the electrodes are recessed along the upper edge of the front side facing the melting tank, which recess accommodates a refractory block which is highly resistant to the corrosive effect of the waste at the melt level. The electrodes require no cooling, and are insulated on their back sides which avoids temperature differentials within the electrodes.

Abstract: A microphone and loudspeaker arrangement for use in a teleconference system, wherein a plurality of microphones are held in a fixed relationship to a loudspeaker. The microphones are independently gated ON in response to (1) speech picked up by the microphone, (2) a loudspeaker signal driving the loudspeaker and (3) an electrical signal related to the microphone signals of the other associated microphones. A noise adapting threshold circuit generates a voltage level representative of background noise which is compared with the microphone signal of a respective microphone for determining whether the microphone is receiving speech. A decisional circuitry monitors the microphone signal of the associated microphone with respect to a MAX bus which carries microphone signals representative of the level of microphone signals at the other microphones. The decisional circuitry generates a signal indicating that the associated microphone is the first loudest microphone signal.

Abstract: The basketball goal support of the present invention need not include the traditional backboard. Rather, this goal support includes a generally U-shaped anchor attachable to a door or similar structure. A hollow cylindrically shaped receptacle is fixed to the anchor for receiving a support tube in close fit within the receptacle. The support tube supports the basketball goal.