Abstract: A room temperature crosslinking, one component (RTV 1C) silicone rubber formulation with hydrophobic, silica featuring extremely low water absorption, a high level of whiteness, and fine-tunable, storage-stable rheological properties with a high reinforcing action in the silicone rubber vulcanizate contains A) from 0.5 to 60% by weight of a hydrophobic silica having the following properties: a carbon content of >3.1%; a methanol wettability of >60%; a reflectance of >94%; a BET/CTAB ratio of from >1 to <3; a DBP absorption of <230 g/100 g; a BET surface area of from 50 to 110 m2/g; a CTAB surface area of >30 m2/g; a water vapor absorption at 30° C. at an ambient humidity of 30 of <1.3; a water vapor absorption at 30° C. at an ambient humidity of 70 of <1.7; and B) 40-99.

Abstract: A room temperature crosslinking, one component (RTV 1C) silicone rubber formulation with hydrophobic, silica featuring extremely low water absorption, a high level of whiteness, and fine-tunable, storage-stable rheological properties with a high reinforcing action in the silicone rubber vulcanizate contains A) from 0.5 to 60% by weight of a hydrophobic silica having the following properties: a carbon content of >3.1%; a methanol wettability of >60%; a reflectance of >94%; a BET/CTAB ratio of from >1 to <3; a DBP absorption of <230 g/100 g; a BET surface area of from 50 to 110 m2/g; a CTAB surface area of >30 m2/g; a water vapor absorption at 30° C. at an ambient humidity of 30 of <1.3; a water vapor absorption at 30° C. at an ambient humidity of 70 of <1.7; and B) 40-99.

Abstract: The invention is an apparatus for mixing and injection molding thermosetting polyurethane. The invention involves using a premixer comprising of a series of specially designed premixing chambers, one or more static, rather than dynamic, mixers, and a specially designed dual-path mixer. After the material is mixed it is pumped into an injector, and then deposited into a mold. This entire process is accomplished in an airtight environment. The mold into which the material is pumped is attached to a vacuum that decreases the chances of any air bubbles being trapped inside the mold. New features of the apparatus include a dual-path mixer and a newly designed premixing chamber.

Abstract: The present invention is directed to a zoom lens device for use in, for example, a copying machine. A support member for supporting a stationary lens is adjustable relative to a guide device for guiding a movable lens in a direction of an optical axis.

Abstract: There is disclosed an apparatus including a guide member for guiding a photographed film, an illumination unit for illuminating the film, a reflection member for reflecting light from the film, a conversion unit for photoelectrically converting light reflected by the reflection member, and a housing which builds in at least the conversion unit and the illumination unit.

Abstract: A process for hydrotreating a hydrocarbon oil contaminated with suspended solid particles and dissolved metallic compounds, comprising the contacting of the oil at an elevated temperature in the presence of hydrogen with porous inorganic oxide particles having a surface area of 1 m.sup.2 /g or less and a pore volume of at least 0.1 ml/g in pores having a diameter of at least 10 microns.

Abstract: An electrical power source connecting device for connecting a first functional body having an electrical power source and a second functional body by an releasably attached connecting portion having an electrical connecting portion is disclosed, comprising a switch whose state is changed when the attaching of the first and second functional bodies is completed, and control means for discriminating the state of the switch upon affirmation of the attachment of the first and second functional bodies to supply electrical power from the electrical power source to the second functional body through the electrical connecting portion, the aforesaid connecting portion including a manually operable locking member for maintaining the attached state and for releasing the attached state, and the aforesaid switch cooperating with the locking member in such a manner that when the attaching of the first and second functional bodies is complete, its state changes, and when the locking member is operated to release, its state

Abstract: In an external-measured real image type finder optical system having a prism for a non-reverse erecting image interposed in between an objective lens system and an eyepiece lens system, parallax correction is accomplished by adjusting the position of at least a part of the objective lens system within a plane perpendicular to the optical axis of the finder optical system.

Abstract: An image pickup system includes a camera body having an image conversion device and a signal processor and a detachable lens including a memory and circuitry for transmitting the memory contents to the camera body signal processor. In one embodiment, the system provides for storage in the lens memory of the spectral characteristics of both the lens and the image conversion device. In a second embodiment, the system provides for storage of spectral characteristic data concerning a plurality of different lenses in memory in the camera body, with the lenses adapted for self-identification. In a third embodiment, camera body memory stores a single lens spectral characteristic for use in common with any one of plural lenses and representative of all such lenses.

Abstract: This invention is based on the discovery of the fact that a proportional relationship exits between a reciprocal of an exit pupil of a photographic lens and an error in light measurement value and provides a camera which is characterized by the provision of means for measuring light of a beam passing through a photographic lens into the camera and deciding an exposure value, means for generating an information corresponding to the reciprocal of the exit pupil of the photographic lens and means for applying correction to said exposure value on the basis of the information generated by said information generating means.

Abstract: The present invention is directed to a diaphragm device and, more particularly, to a device for adjusting a position of a guide groove connected to a diaphragm blade to control movement of the diaphragm blade, thereby adjusting a diaphragm opening. The present invention provides a diaphragm device including means for adjusting said diaphragm opening in which a position of a guide groove for defining a reduced opening state of the diaphragm is movable about a pivot axis corresponding to a position of the guide groove where the diaphragm is in full open state, thereby adjusting the opening characteristic at the side of the reduced opening state.

Abstract: A lens mounting having a diaphragm unit with a stepping motor as a drive source therefor. A bearing mechanism for the rotor of the motor is constructed with its inner ring in unified form with the rotor unit, and whether or not the diaphragm is at full open aperture is determined by detecting a particular phase of rotation of the rotor.

Abstract: A mechanical mounting for a zoom lens having a tubular body in which is rotatably fitted a cam sleeve for controlling the axial movements of optical elements contributing to a zooming action. In order to keep the axial position of the cam sleeve relative to the body tube with a high precision accuracy as it rotates about the optical axis, a restraining mechanism is constructed in the form of rollers radially extending from the cam sleeve into a fitted circumferential interior recess of the body tube.