Abstract: An antenna for providing a vertically polarized omnidirectional horizontal radiation pattern comprising colinear dipoles. Suitable feeding arrangements are provided for electromagnetically feeding the dipoles with a signal. An axially extending conductive member is spaced on either side of the colinear dipoles. The axis of each of said conductive members as well as the axis of the dipoles are colinear and parallel.

Abstract: A probe excited, open-end waveguide which can be used as an independent antenna, or as a launcher for an end fire, radiator and which achieves higher gain than conventional waveguides without an increase in size. The waveguide is formed as an elongated metallic container which includes a metal structure positioned within the container spaced from the side walls of the container and located within one half of the volume of the container, this volume being defined by cutting the cylinder along its elongated axis. A probe extends from the metal structure for excitation of the waveguide. An electronics package, conventionally utilized in conjunction with the waveguide can be positioned in the container within or under the metal structure. The electronics package does not interfere with the operation of the antenna. The antenna achieves higher gain as a result of the presence of the metal structure.

Abstract: An antenna assembly comprising elementary driven antenna elements and curvilinear end-fire directors on a conventional supporting structure to obtain an omnidirectional or other desired antenna pattern, even for supporting structures of relatively large transverse dimensions. The end-fire directors employ one or more curved conductive members.

Abstract: A disc-on-rod end-fire type antenna is disclosed in which close to optimum gain is maintained over a large range of antenna lengths, using the same disc size and spacing for all lengths.

Abstract: A microwave television system comprising, a probe excited waveguide, an electronics circuit package contained within the waveguide, and a support for mounting the waveguide. The probe excited waveguide is an open-end waveguide which can be used as an independent antenna or a launcher for an end fire radiator, and which achieves a higher gain than conventional waveguides without an increase in size. The waveguide is formed of an elongated metallic container and includes a metal structure positioned within the container spaced from the side walls of the container and located within one half of the volume of the container, this volume being defined by cutting the cylinder along its elongated axis. A probe extends from the metal structure into the other half of the container for excitation of the waveguide. The electronics package conventionally utilized in conjunction with the waveguide can be positioned in the container beneath the metal structure.

Abstract: A multi-jaw chuck having a centrifugally-actuated attachment for counterbalancing the adverse effect of centrifugal force on the chuck jaws during high speed operation. The chuck attachment includes an annular, hollow housing coaxially mounted on the chuck body and a lever associated with each of the jaws of the chuck which is pivotally mounted in the housing for pivotable movement about an axis parallel to the chuck body axis. Each of the levers includes a first pivot arm, disposed on one side of the pivot axis, for engagement with the jaw associated therewith and a second pivot arm, disposed on the other side of the pivot axis. The second arm has an effective length and weight such that it moves outwardly from the axis of the chuck body as a result of the centrifugal force developed upon rotation of the chuck body and, in turn, urges the first arm into engagement with the jaw associated therewith.

Abstract: An electronic control system which can control the operation of a number of electrical devices such as lights, outlets, sensing apparatus, etc., all of which are energized from the same power lines. Each of the electrical devices is respectively connected to the power lines by an addressable switch unit. A central control unit is connected to the power line and generates a binary coded time division multiplex signal, including an address portion and a command portion. The encoded signal is transmitted directly onto the power lines and is received by the addressed switch, which responds to the command to control the state of the electrical device, and in turn sends a status response onto the power lines which is received at the central unit.

Abstract: A hand tool having integral work area illumination means and magnifying means capable of being held and adjusted by one hand of the user. The apparatus may be powered by internal batteries or from an external source by means of an adapter.

Abstract: A dual gauge device for simultaneously indicating the quantity of liquid in a container and the amount of liquid that has been added to the container during a selected period of time irrespective of the amount of liquid withdrawn from the container during the same period of time.

Abstract: A covert mobile communications omni-directional gain UHF antenna comprises a body having a U-shaped cavity and radiating slot, an L-shaped feed line and an end-loaded, open-circuited voltage probe. The antenna is tuneable by adjusting a pair of variable capacitors to match the impedance of the antenna to that of an attached coaxial cable and transceiver.

Abstract: An alarm clock has associated with it an alarm and a snow-sensing means for detecting an accumulation of snow. The clock is provided with means for setting an alarm at two individually presettable times, one of which is set for normal waking and the other set in advance of the first to alert the sleeping user at a time earlier than the preset normal wakeup time when there has been an accumulation of snow while he slept.

Abstract: A connecting structure for shelves comprising horizontally-disposed distributing trays detachably affixed to vertical supporting members. The trays are provided with bent edges and with plastic elbows to cover the corner gaps of adjacent flank faces. The elbows have openings therein for screwing the trays to the supporting members.

Abstract: An omnidirectional broad band antenna employs a slot and a pair of radiating arms excited by the slot. In one embodiment slots are formed in a coaxial transmission line and covered by a resin bonded filament wound glass fiber tube which serves as an integral radome and permits pressurization. The arms are of substantial girth and arc upwardly, downwardly respectively and circularly, one clockwise and the other counterclockwise thus providing a large spacing between arms. The antenna is characterized by a broad bandwidth and low VSWR.

Abstract: The method hereof, conducted at the factory or site of printing of the wall covering, advantageously uses the same work or printing station reference that accurately positions the imprinted pattern on the wall covering substrate for the positioning of cutting means effective to sever said substrate free of the opposite unprinted selvage areas. Thus, although the substrate, which typically is a 100-foot strip, may be inadvertently slightly misaligned from a perfectly straight orientation, the cutting means nevertheless effectively moves along that path which accurately slits free the selvages of the "misaligned" substrate because it is guided by said imprinting reference during said movement.

Abstract: A circularly polarized antenna providing an omnidirectional pattern over an extremely broad band of frequencies. A pair of arcuate dipoles are mounted at an angle relative to each other and at about 45.degree. to the horizontal plane and fed 180.degree. out of phase from a common feed. The feed lines and feed points are completely enclosed.

Abstract: A practice pad for a drum or similar percussion instrument of the type fabricated of a construction material having sound-muffling characteristics and used in a directly supported position on the playing head of the drum, in the use of which all auxiliary structure to hold the pad on the drum vibrating playing head, and thus keep it in place, is eliminated. This is done simply by the advantageous selection of an appropriate weight oil-tanned leather as the construction material for the pad. In use, this specifically selected material has the proper weight to dampen, and thus muffle the drum auditory output and, also, by its sheer weight maintains a flat, surface-to-surface contact with the vibrating drum playing head, thus obviating any need for appropriate clamps or other structural members which typically are attached to the drum and to the pad.

Abstract: A vest having a semi-rigid closed cell foamed polyethylene liner which disperses the shock of impact of a ball. Padding provides additional cushioning as a shock absorbant. The vest is light in weight and is provided with crease lines which permit the semi-rigid liner to yield in order to enable the wearer to assume various postures.