Abstract:
CESIUM SPECIMENS IN SOLUTION ARE FED INTO A STANDARD ASPIRATING BURNER. A PAIR OF PHOTOMULTIPLIERS MONITOR THE FLAME RADIATION OF THE BURNER AND BAND-PASS FILTERS ARE USED WITH EACH PHOTOMULTIPLIER TO PRODUCE SIGNALS RESPONSIVE EXCLUSIVELY TO CERTAIN WAVELENGTHS OF THE RADIATION. ONE FILTER PASSES A NARROW BAND OF WAVELENGTH CENTERED AT THAT OF OF CESIUM OR THE SPECIMEN BEING ANALYZED, WHILE THE OTHER FILTER PASSES A PROXIMATE BUT SEPARATE BAND. INTERPOSED AT AN ANGLE TO THE AXIS OF THE BEAM OF LIGHT FROM THE FLAME TO ONE PHOTOMULTIPLIER, A PLANE OF GLASS REFLECTS A PREDETERMINED FRACTION OF THE BEAM TOWARD THE SECOND PHOTOMULTIPLIER. SINCE THE SIGNAL FROM THE CESIUM-RESPONSIVE PHOTOMULTIPLIER IS RESPONSIVE TO THE INTENSITY OF THE CESIUM RADIATION AND SINCE THE OTHER PHOTOMULTIPLIER IS RESPONSIVE EXCLUSIVELY TO A SIGNIFICANT AND REPRESENTATIVE FRACTION OF THE BACKGROUND RADIATION, THE TWO SIGNALS CAN BE DIFFERENTIATED TO PROVIDE A QUANTITATIVE DETERMINATION OF THE CESIUM CONTENT OF THE SAMPLE OR SPECIMEN EVEN WHEN THE FLAME FLUCTUATES.
Abstract:
A system for indicating the density and the combination of color compensating filters to be selected for the correction of color balance and for measuring the amount of exposure for color printing to be used in making positive images from the negative images comprises a plural number of detectors which are electrically connected in series and adapted to measure the light beam which has passed through color negatives.
Abstract:
A flow-through cell analyzer using a compensating photoelectric circuit indicating the ratio of light passing through a measuring cell and light impinging on the cell. A source of light projects a beam which is controlled, for example, by different filters and which is split into two equivalent beams going to respective photoelectric cells the outputs of which are compared, one of the cells providing a reference voltage which is kept constant by varying the intensity of the light source or by the use of filters or diaphragms.
Abstract:
A DIRECT READING COLORIMETER FOR CHEMICAL ANALYSIS IS PROVIDED WITH A PLURALITY OF METER SCALES AND A PLURALITY OF COLOR FILTERS WITH INTERLOCKING MEANS FOR AUTOMATICALLY SELECTING THE SCALE AND FILTER APPROPRIATE TO THE SPECIFIC ANALYSIS TO BE PERFORMED.
Abstract:
Method and apparatus for monitoring present location of a site arrestee confined to a permitted site of arbitrary size. Present location of the arrestee can be checked at selected time intervals of several hundred milliseconds to thousands of seconds, as desired. The arrestee wears a location-determining ("LD") unit that receives electromagnetic signals that contain information allowing determination of the present location of the LD unit and arrestee, from three or more non-collinear signal sources. These sources may be radiowave subcarrier transmitters, or may be a combination of radiowave subcarrier transmitters and (1) transmitters for a Loran, Omega, Decca, Tacan, JTIDS Relnav or PLRS or similar ground-based system, or (2) transmitters for a satellite-based positioning system, such as GPS or GLONASS. Present location or change in present location of the LD unit is determined and compared with the permitted site boundary at selected times to determine if the arrestee is present at the site. The LD unit issues an alarm signal if the arrestee is not on the presently defined site. The permitted site can be redefined, for a selected time interval, to include the first designated site, a second designated site and a corridor extending between the first and second designated sites. This allows the arrestee to temporarily leave the original designated site to seek service for medical or other needs, or to be transferred to another site. The arrestee can be excluded from one or more designated exclusion sites.
Abstract:
Monitoring device for densitometrically evaluating printed sheets with a printed print-monitoring strip includes holding means, a plurality of first densitometers for exclusively measuring full-tone density carried by the holding means at a selective spacing from one another so as to define respective gaps between the first densitometers, and a plurality of second densitometers for measuring at least one tone density value selected from a range of screen and full tone values, the second densitometers being receivable, respectively, in the gaps between the first densitometers and being connectible to a device for mathematically correlating the values measured by the second densitometers with quality-assessing parameters.
Abstract:
An integrating densitometer for comparing unknown values of an integrated color print with reference values of a standard to indicate changes in density and quality and quantity characteristics of color for correcting the values of the unknown to have substantially the values of the reference, the densitometer having a photopic filter before a light sensor, and a master control for biasing simultaneously individually adjustable color controls.