Abstract:
A triggering transformer having windings surrounding a photographic flash tube fires the latter when the transformer primary winding is energized by the closure of a switch. This switch closure also turns off a transistor which then unblocks a light sensitive integrator including an LASCR which receives the flash tube light by reflection. When the integrator has received a predetermined quantity of light, the LASCR turns on and energizes the primary winding of a second triggering transformer having windings surrounding a quench tube connected in parallel with the flash tube. This fires the quench tube which in turn extinguishes the flash tube.
Abstract:
A SINGLE UNIQUE UNIVERSAL INK MIXTURE CONTAINING POLYETHYLENE OXIDE POLYMER AND OTHER INGREDIENTS WHICH CAN BE USED IN PLACE OF THE NUMEROUS DIFFERENT TYPES OF TAILOR MADE SLOW DRYING, QUICK DRYING AND GENERAL PURPOSEMEDIUM DRYING INKS THAT HAVE HERETOFORE BEEN REQUIRED TO MAKE DIFFERENT TYPES OF RECORDS. THIS MULTI-PURPOSE INK IS ALSO USEFUL IN INSCRIBING A CLEAR CONTINUOUS LINE ON A MARKING SURFACE E.G. A CHART DURING ADVERSE WRITING CONDITIONS WUCH AS WHEN IT IS REQUIRED T BE TRANSMITED THROUGH A LONG LENGTH OF CAPILLARY TUBING TO A PEN AND WHEN IT IS TO BE USED IN AN ABNORMALLY HUMID OR BELOW FREEZING CLIMATE.
Abstract:
A digital to analog conversion circuit for producing an analog signal proportionally related to the length of a line segment whose quadrature components are represented by a pair of digital signals. The circuit comprises a constant current source and a current sink connected by current path means whose impedance is varied in accordance with the sum of first and second fractions of the larger and smaller digital signals respectively to produce the analog voltage at the input to the current path means. The current path means may comprise a plurality of parallel weighted resistive elements, each in series with a digitally controlled switching element. A logic circuit is provided for directing the larger and smaller digital signals to the appropriate switching elements.
Abstract:
Electric switching apparatus having an adjustable differential switching action. A two-state switching device, for instance a relay, assumes a state dependent on the response of a pair of photoelectric cells which, in dependence on the position of a movable vane, are illuminated by a lamp. The switching device is controlled by the cells through a circuit having a switching differential, that is exhibiting hysteresis or backlash, such that switching occurs only when both cells become shielded from the light or exposed to it. The two cells are movably mounted such that the distance the vane has to move to produce switching, and hence the differential switching action, is adjustable.
Abstract:
A pressure ratio indicator used to determine the ratio of a first and second fluid pressure. The indicator consists of a plurality of curved wall-orifice arrangements of varying parameters and a fluid detector for each arrangement. A jet of fluid issuing from the orifice will be made to have, for each successive curved wall-orifice arrangement, an increasing tendency to detach from the wall. The attachment of the jet to the wall will be detected by a first set of detectors and will not be detected by a second set of detectors since separation has occurred prior to reaching these detectors, so that the pressure ratio is determined to be a value greater than that necessary to cause flow to exist at the first set of fluid detectors which are detecting flow, but less than the value necessary to cause flow to exist at the second set of fluid detectors which are not detecting flow.
Abstract:
A read only memory utilizes magnetic cores rotated 90* from the normal orientation about the read/write coincident wires so that their magnetic state cannot be switched, thereby indicating the storage of logical zeroes regardless of the actual state stored. Logical ones may be stored by orienting the magnetic cores in their normal orientation, so that they can be switched. The read only memory may also be combined at random locations in a standard read/write magnetic core memory thereby sharing the read/write logic, sense logic and inhibit logic associated with a single memory system.
Abstract:
A multiphase encoder translates the bits of a Non-Return-to-Zero digital signal into a three frequency self-clocking signal characterized by having a data transition at the center of a binary ONE bit and a data transition between successive binary ZERO bits.
Abstract:
A moving contact arrangement, for a relay, for example, which allows for selective normally open and normally closed contact orientation with respect to fixed contacts by rotative movement between two opposite positions of a bridging bar carrying the moving contacts about an axis substantially parallel to and coextensive with a straight line connecting the moving contacts.
Abstract:
A pneumatic unit ventilator control system utilizing a diaphragm logic memory circuit for winter-summer changing over to allow the running of a single main from the pressure source to the units. Depending upon the magnitude of the main pressure input to the memory circuit, and upon previous alterations of the main pressure, either summer or winter control will be achieved. Recycling means are included in the system to assure the return of the system to the desired mode of operation after a fluid pressure failure or a changeover from one mode of operation to another.
Abstract:
A HIGH PRESSURE, LOW VOLUME, HYDRODYNAMIC PUMP COMPRISING A SLEEVE, A SHAFT ROTATABLE WITHIN THE SLEEVE, MEANS TO VARY THE GAP BETWEEN THE SHAFT AND THE SLEEVE, AND AN OUTLET IN THE SLEEVE. WHEN SUBMERGED IN OR OTHERWISE PROVIDED WITH A SUPPLY OF FLUID SUCH AS OIL, RELATIVE MOTION BETWEEN THE SLEEVE AND THE SHAFT RESULTS IN THE ESTABLISHMENT OF A HYDRODYNAMIC PRESSURE BETWEEN THE SLEEVE AND THE SHAFT WHICH PRESSURE CAN BE INCREASED OR DECREASED BY DECREASING OR INCREASING THE GAP BETWEEN THE SLEEVE AND THE SHAFT.