Abstract:
An optical instrument including means for selecting one of several magnifications of an image being viewed, the selective magnification means being positioned in a collimated light path between an objective lens and a viewing lens and without change of conjugate distances therebetween; also an aperture stop located at one conjugate plane of a relay lens, the other conjugate plane being the nodal plane of the objective lens, which serves as a light-attenuating means without interference with the viewing optical system or without affecting the field being measured.
Abstract:
An integrated circuit comprising several transistors on a chip is maintained at a constant temperature by utilizing certain of the transistors as heating elements and other transistors as temperature sensors in a closed loop feedback network. The remaining transistors-not thus utilized for temperature regulation and sensing are available for use in work circuits where sensitivity to ambient temperature variations or selfheating present design problems.
Abstract:
A series-wave winding for a dynamo-electric multipolar machine having at least three pairs of inductor field poles on a face of a magnetic airgap progresses by waves each covering a quadruple polar pitch of the machine.
Abstract:
OPTICALLY CLEAR SENSITIZING SOLUTIONS FOR RENDERING SURFACES RECEPTIVE TO THE DEPOSITION OF AN ADHERENT ELECTROLESS METAL COMPRISE WATER AND A METAL COMPLEX CONSISTING OF (A) A PRECIOUS METAL SELECTED FROM A GROUP CONSISTING OF THE PRECIOUS METALS OF THE FIFTH AND SIXTH PREROIDS OF GROUPS VII AND I-B OF THE PERIODIC TABLE OF ELEMENTS, (B) A GROUP VI METAL OF THE PERIODIC TABLE OF ELEMENTS WHICH IS CAPABLE OF TWO VALENCE STATES AND (C) AN ANION CAPABLE FO FORMING A STABLE MOIETY WITH BOTH VALENCE STATES OF THE GROUP IV METAL, IN WHICH THE MOLAR RATIO OF (A) TO (B) TO (C) IS FROM ABOUT 1:1:3 TO 1:6.24. THE SOLUTIONS CAN BE PREPARED DIRECTLY FROM THE COMPONENTS OR, PREFERABLY BY DILUTING A CONCENTRATE. THE SOLUTIONS CAN BE STABILIZED AGAINST PRECIOU METAL SEPARATION BY ADDING AN ORGANIC MONO-OL, DIOL OR POLYOL, A FLUORINATED HYDROCARBON WETTING AGENT OR HYDROGEN FLYORIDE. PROCESS FOR RENDERING SURFACES RECEPTIVE TO THE DEPOSITION OF AN ELECTROLESS METAL ARE ALSO PROVIDED IN WHIC THERE ARE EMPLOYED THE NEW SENSITIZING SOLUTIONS.
Abstract:
THERE ARE PROVIDED MOLDING COMPOSITIONS COMPRISING PARTICLES OF RESIN HAVING INCORPORATED THEREWITH FILLERS CATALYTIC TO THE DEPOSITION OF ELECTROLESS METALS. THE CATALYTIC FILLERS ARE MADE BY REPLACING THE CATIONS IN PARTICULATE BASE EXCHANGEABLE MATERIALS WITH A CATION OF A METAL SELECTED FROM GROUPS 1 B AND 8 OF THE PERIODIC TABLE OF ELEMENTS. ARTICLES MOLDED FROM THE COMPOSITIONS AND THE WALLS OF HOLES DRILLED IN THEM ARE METALLIZED ON BEING IMMERSED IN ELECTROLESS METAL DEPOSITION BATHS.
Abstract:
A photometric device for measuring uniformity of illumination and color characteristics of light across an aperture area passing light from a light source, said device including an array of isolated light responsive elements and an associated calibration circuit for equalizing the output of each of said light responsive elements under conditions of uniform illumination. A photometer to measure illumination uniformity, average illumination, and color characteristics of light at a film gate of a continuous or non-continuous photographic or optical printer.
Abstract:
An optical system for a photometer including a light-measuring path provided with means for accurately defining a plurality of areas from which light is to be measured within a larger field of view.
Abstract:
In a full wave rectified control circuit for a D-C motor comprising two banks of silicon controlled rectifiers for forward and reverse operation, there is provided a pulse generation system which applies a firing signal to each of the control SCR''s when the power to the motor is lost. A short circuit is thereby provided for the motor armature through the control circuit and the rotational energy of the motor is rapidly dissipated to effect dynamic braking.