Abstract: A linear positioning device such as for optical measurements, having a base plate, an object carrier and a micrometer screw. Protruding extensions are formed on the base plate, a compensating member is arranged between the base plate and the object carrier. An actuating lever is inserted between the support of the object carrier and the operating micrometer screw. The compensating member is connected by leaf springs both to the extensions of the base plate and to the support of the object carrier, while said support is connected by a spiral spring to the extension of the base plate. The actuating lever of the device is connected by means of a transverse-spring-actuated joint to the extension of the base plate and by a leaf spring to the support of the object carrier and the operating micrometer screw which is led through one of the extensions of the base plate, is bearing up against the actuating lever.

Abstract: An illuminated display means is shown having, in combination, a support and a double faced sign frame. The structure includes a support having rigid arms for holding the sign frame in a generally vertical position for display of both of the faces thereof. The sign frame is formed of an extruded aluminum strip that is shaped to have protruding flange means adapted to slide into engagement with rigid arms on the support to permit easy and quick assembly of the sign frame on its support means. Preferably, a vertical support post is provided having the rigid arms extending horizontally therefrom on both sides of the post to provide a balanced multiple sign display.

Abstract: A method and means facilitating alignment of a focusing mirror in an optical spectrometer to maximize resolution and performance capability. More particularly, in an optical spectrometer having a monochromator with entrance and exit ports and a grating, an improved method and means for aligning a focusing mirror so that an optical beam can be easily and accurately focused on the entrance or exit ports of the monochromator or on its grating.

Abstract: A screen or storm window attachment system comprising a snap-type attachment means mounted so as to allow for dimensional changes in the casing on which it is detachably mounted. The snap-type attachment means is mounted flexibly near the perimeter of the screen or storm window, and includes means to accurately position the mating snap portion to be mounted on the window casement. This system may be used on the inside or outside of existing window casings.

Abstract: A one-piece spring clip for mounting a flat member on a rod-like member. The clip is disposed within an aperture in the flat member and includes a body portion defining oppositely disposed slots extending axially from the end of the clip adjacent the rod-like member, and then circumferentially to permit rotation of the clip from a disengaged position to an engaged position. As the clip is rotated toward the engaged position, and the rod-like member passes through the circumferential slots, the rod-like member is drawn into engagement with the rearward surface of the flat member, thereby preventing substantial relative movement between the flat member and the rod-like member.

Abstract: A security frame and mirror assembly for mounting to a wall, including a frame with a sidewall and a flange thereabout, a plurality of threaded receptacles secured to the rear face of the flange, mirror nested between the receptacles and the flange, and threaded rods having one end secured to the threaded receptacles and the other end engaged with the mounting wall.

Abstract: The present invention relates to a device for positioning and supporting apparatus, particularly for optical instruments in a laboratory, constituted on the one hand by a support rail and on the other hand by a clamp mounted to slide on said rail, the rail being constituted by a linear circular-sectioned tubular structure, the tubular section having four diametrically opposite radial fins projecting therefrom, the clamp is adapted to be positioned on two adjacent fins, the clamp comprising two side branches, one of which receives an adjustable locking member abutling an outer face of a fin.

Abstract: A set of connecting elements and mounting elements are provided with split openings and clamping means arranged selected distances apart and at selected orientations so that these elements may be attached to rods to form a multidimensional frame for mounting laboratory and experimenting equipment. Adjustable mounting devices are provided with three point supports centrally arranged on the mounting elements adjacent to apertures therein so that optical elements and other such devices may be supported on the mounting elements and so that the axes of such devices may be tipped or displaced as required for a particular situation.