Abstract: An inspection system for a welding apparatus for performing welding by supplying electric power outputted by an inverter based on a command from a welding control unit, through a welding transformer to a welding gun. The inspection system includes a first input/output section for receiving positive and negative components of a waveform outputted by the inverter and for outputting waveforms, a second input/output section for receiving waveforms outputted by the welding control unit and for outputting waveforms similar to those outputted by the inverter. A selector selects the operation of either the first or second input/output sections. A first OR circuit has applied thereto the first waveforms outputted by the first and second input/output sections, and a second OR circuit has applied thereto the second waveforms outputted by the first and second input/output sections. A third OR circuit has the outputs of the first and second OR circuits applied to the inputs thereof.

Abstract: A ship track and underwater conditions indicating system for displaying a ship track and the underwater conditions under the ship track at the same time on the screen of an indicator, and for associating the two resultant pictures with each other. The ship track and the underwater conditions are respectively displayed on two corresponding portions of the face of the indicator by dividing the screen into two parts. Also, the ship track or the underwater conditions are selectively indicated on the whole screen of an indicator at different times.

Abstract: A process for removing ash from coal comprising the steps of transferring pulverized coal to be treated by entraining it on a stream A of anti-oxidation gas, feeding the coal laden gas into dry-type electric precipitating chamber means 2 after suitably adjusting the temperature and humidity of the gas during transport, and separating particulate ash from the coal particles by capturing the former in the chamber means 2 by virtue of difference in specific resistance between the two kinds of particles, whereby highly purified coal B is obtained as entrained on the gas stream at the outlet 3 of the chamber means 2.

Abstract: This invention relates to an automatic seat belt applying device. Said device comprises seat belt means adapted to confine an occupant of a seat to a back rest thereof, a spring-loaded retractor secured to a vehicle body reinforcing member, and a guide mounted at a front end of a member connected for operation in association with opening and closing of said door and loosely supporting an intermediate portion of said seat belt means so as to guide the same. Said seat belt means is connected at one end to said retractor to be wound thereon by the resilience of the spring and at at least another end to a supporter mounted at least for forward and rearward movement in an outer marginal portion of a door hingedly supported at its inner marginal portion by a vehicle body and disposed adjacent said seat.