Abstract: A combined observation and laser therapy instrument having an optical system which is fully compensated for the difference in focus of the laser radiation and the observation light.

Abstract: A safe having an outer shell mainly of plastic material, an inner liner of metal, and a filling of heat-resistive material between the shell and the liner. The safe body has a separate cover or door across the top of the body, and when the door is removed, it allows unhampered access to the complete area of the liner, which constitutes the storage space for the articles to be protected. Both in the safe body and the separate door, the filling material is put in while in a flowable condition, and filling is stopped when the space is not quite full. The panel members which are then put in place to close the filling openings have projections which make contact with the filling material to give stability and firmness to the panel members even though large areas of the panel members may not be in contact with the filling material. A simple latch and key mechanism is also disclosed.

Abstract: Resilient element material for a vibratory feeder is molded of a resilient plastic resin to have a base and generally upright elements molded integrally with the base and having upper ends that cooperate to support objects being fed vibrationally. The upright elements are configured so they bend in the feed direction and brace against bending in a direction opposite to the feed direction. This can be done by providing abutments or buttresses adjacent the elements, or configuring the elements so that the weight of the objects places a load on their upper ends spaced toward the direction of feed from respective lines perpendicular to the base through the centers of the bottoms of the elements. The upright elements then bend consistently in the feed direction under the weight of the objects during vibration to convey the objects along. The elements can also be molded to be tapered and to incline from a perpendicular to the base toward the direction of feed to bend reliably in the feed direction.