Abstract: A photographic printing and developing apparatus includes a turnout device for separating a transfer path, along which sheets of printed paper are conveyed from a printing station to a development station, into a main transfer path and a branch transfer path. A joining device joins the branch transfer path to the main transfer path at a position downstream of the separating position. The turnout device selectively transfers sheets of printed paper of a given size to the branch transfer path.

Abstract: An apparatus for vacuum absorption is provided which is quiet and simplified with maintaining an absorption power. The apparatus comprises: a tank for accumulating circulating water; a waterway for circulating the circulating water by a pump disposed at an absorption inlet side of the waterway and having an outlet disposed over the water surface of the circulating water in the tank; an aspirator disposed on the waterway; and a reverseflow prevention mechanism surrounding the outlet, having a small hole of the size to drain less volume of water than the volume flowing out of the outlet at the position sunk under the water, and comprising a buffer (hollow body) with drain windows at the position over the water surface. The apparatus serves to drain the circulating water into the water during the operation of the pump and to absorb air from the outlet into the vacuum vessel during the stoppage of the pump.

Abstract: An apparatus for vacuum absorption is provided which is quiet and simplified with maintaining an absorption power. The apparatus comprises: a tank for accumulating circulating water; a waterway for circulating the circulating water by a pump disposed at an absorption inlet side of the waterway and having an outlet disposed over the water surface of the circulating water in the tank; an aspirator disposed on the waterway; and a reverse flow prevention mechanism surrounding the outlet, having a small hole of the size to drain less volume of water than the volume flowing out of the outlet at the position sunk under the water, and comprising a buffer (hollow body) with drain windows at the position over the water surface. The apparatus serves to drain the circulating water into the water during the operation of the pump and to absorb air from the outlet into the vacuum vessel during the stoppage of the pump.

Abstract: A method of inspection of structures in which a hammer capable of imparting a non-destructive impact to an object to be inspected and provided with a pressure sensor or an acceleration sensor is hit against the object and, from a signal then put out, a processed signal of the time during which the hammer is in contact with the object or of the waveform signal during such time is displayed, apparatus provided with a signal processing device for the measurement of the above time, and apparatus provided with a device for removing an impact driving force responsive to a signal put out when the hammer contacts the object, for the measurement.