Abstract: A simple fluid actuated vehicle is described in the shape of a hollow hand which, by remote bulb pressure, precesses along a given route by means of advancing digits.

Abstract: In a diazo developer apparatus which includes a chamber, slightly larger than the film to be developed, having continuously circulating ammonia gas uniformly distributed in the film area, ammonia gas entry and exit ports, a temperature control device for the chamber, and elements in the chamber for preventing the film being processed from closing the exit port. The gas is derived from a container holding a predetermined amount of liquid ammonium hydroxide through which the gas exiting from the chamber is bubbled. The gas is derived from the container above the liquid level and fed directly to the chamber.

Abstract: A file cabinet construction includes at least one shelf mounted within a housing having parellel opposed side walls and a rear wall. A number of guide rails are mounted at predetermined positions along the shelf so that they are parallel to the side walls of the housing. Each guide rail has a longitudinal slot extending into the guide rail from the end located nearest to the rear wall of the housing and terminating at a point adjacent to the forward edge of the shelf. A boxlike container which includes opposed parallel longitudinal sides and a bottom having a longitudinal channel is detachably mounted on each guide by a floating pin. The floating pin is mounted so that the longitudinal axis of the pin is transverse to the channel in the bottom of each container.