Abstract: An electromotive scooter body is a hollow construction made of fiber reinforced plastics, so that the body is strong and light to reduce load on a traveling motive power source. The body can be separated into upper and bottom parts and the hollow of the bottom part accepts many batteries, so that a center of gravity of the scooter can be low.

Abstract: Apparatus for depolarizing light received from a source of light comprises a body of material that defines an optical waveguide, the material of the body and the length of the waveguide being such that when polarized light is propagated through the waveguide, light in one of two polarization eigen states is retarded relative to light in the other polarization eigen state by a time such as to destroy phase coherence between the polarization eigen states of the light emitted by the source. The relative amplitudes of the two polarization eigen states of polarized light entering the wave-guide are adjusted.

Abstract: A kiln controller controls the drying of lumber in a kiln by executing a drying schedule and adjusting the drying schedule in response to actual measured conditions in the kiln. A computer within the controller controls heating coils, spray nozzles and vents in the kiln to achieve the conditions prescribed in the drying schedule. The computer first executes a routine whereby the kiln temperature is brought up to a desired initial temperature. Then the computer concurrently executes the drying schedule and a routine wherein it monitors the temperature, vent load and spray nozzle activity, and automatically adjusts the duration of the current step in the drying schedule.

Abstract: The present invention relates to a system for inspecting large scale structural components such as concrete walls or the like. The system includes a mobile gamma radiation source and a mobile gamma radiation detector. The source and detector are constructed and arranged for simultaneous movement along parallel paths in alignment with one another on opposite sides of a structural component being inspected. A control system provides signals which coordinate the movements of the source and detector and receives and records the radiation level data developed by the detector as a function of source and detector positions. The radiation level data is then analyzed to identify areas containing defects corresponding to unexpected variations in the radiation levels detected.

Abstract: A four terminal ohmmeter apparatus includes circuitry for blanking the meter read-out in the event one or more connections to a device or structure under test have been improperly made. The voltage drop between current terminals is determined and compared with a threshold value. The voltage drop between potential terminals or between potential and current terminals, as caused by a separate a.c. source, is also determined and compared with a standard. Individual indicators inform the operator of the validity of each connection in order that corrective action can be taken if necessary. Voltage inputs are also utilized for ascertaining whether a correct meter range is being used and for changing the range if it is improper.

Abstract: An electrical connector comprises dielectric material defining a passageway, a conductor element having a surface portion that is spaced from, but presented towards, the central axis of the passageway, and a composite rod of dielectric material and conductive material. The rod comprises an elongate core of dielectric material and an elongate body of conductive material secured to and extending lengthwise of the core. The rod can be inserted into the passageway along the central axes of the passageway. When the rod is fitted in the passageway, the body of conductive material engages the surface portion of the conductor element, so that electrically-conductive contact is established between the conductor element and the body of conductive material.

Abstract: The invention relates to a method for manufacturing heat-resistant and/or fire-resistant fibre materials, when the employed initial material is molten slag from metal processes. According to the invention, the slag holding furnace (5) is used for achieving an essentially even and continuous molten flow from the slag smelting furnace (3) into the mineral wool furnace (6). The invention also relates to an apparatus for realizing the method, wherein the holding furnace (5) is provided with at least one control device (12) which shifts the furnace (5) between the different filling positions in order to ensure an even and continuous flow of molten material.