A system is described in which a plurality of energy sources sequentially project segments of a directional code to a predetermined sector of space. An observer within the sector determines the angle between a reference direction and his line of sight to the system by noting the sequence and timing of the energy pulses he receives as successive segments are projected.

The present system determines the linear position of a machine tool slide driven by a lead screw. The rotational position of the lead screw is sensed by an analog-to-digital converter which produces a number designating the nominal linear position of the slide corresponding to the sensed rotational position of the lead screw. The system has an error program containing, for each one-inch increment along the lead screw, a digital error signal which represents the mean deviation between the slide's...

Apparatus for determining flammability of fabrics or other materials. The apparatus comprises a baseplate, means fixed to the baseplate for positioning and supporting a plurality of specimens above the baseplate in a spaced relationship such as to provide a gap between the specimens extending transversely of the baseplate and means for holding specimen igniting means on the baseplate beneath the specimens and in alignment with the transverse gap.

In applications where a movable body is to be precisely displaced and oriented over a range of movement with respect to a relatively fixed body, as for example, to maintain the movable body on a precise axial alignment (free of tilt and lateral offsets) over a range of axial displacement of the movable body, the invention contemplates a combination of optical systems, particularly afocal systems having imaging characteristics .beta.' = +1 and .beta.' = -1. These afocal systems include component ...

A distance ranging system of conventional design is utilized to measure radial distances transversely to the direction of motion of a vehicle or other object along a right-of-way. Using a high speed rotating transducer element, successive radial scansions are made during the vehicle movement. Each successive radial scansion or sweep is divided into segments or channels, one for every preselected number of degrees of arc in the swept field under examination. At least one channel covers every port...

A superposition algorithm is presented for reconstruction of a closed curve from length and width values. That is, the "thickness" of the curve as viewed from two intersecting directions. A special purpose digital computer is described for automatically reconstructing the shape of closed curves. The computer performs the algorithm steps, displays the results and permits easy correction of input data. A memory is employed in the computer with a plurality of memory planes each in the form of a mat...

A method and apparatus for determining the amount and location of corrective weight required to compensate unbalance in a vehicle wheel and tire without removing the wheel and/or tire from the vehicle. The wheel and tire are maintained out of contact with the ground and are turned at conventional highway speeds. An index tape is applied to the tire rim. Two separate spinnings of the wheel are required: one with a known trial weight affixed to the wheel rim, and one with the wheel and tire in the...

The invention provides a system employing a radio interferometer, in conjunction with a satellite whose orbit is precisely known, for determining the azimuth of a receiving station receiving a signal from said satellite by computing the relative phase difference of the signal from said satellite as it appears at each of two spaced antennas at said receiving station.

A method of determining hemoglobin in blood using Drabkin's reagent wherein acetone is added to the reagent as a loss of color inhibitor and to aid in attaining immediate recovery of the peak absorbance of cyanmeth-hemoglobin.

This disclosure is directed to a system for surveying ocean or inland water o obtain depth or slant range information without recording false signals. The system makes use of a single generator that generates a signal which starts a counter and is transmitted into the water. A portion of the generated signal is directed into the delay circuit which delays the signal that controls a gate through which the return signal is processed. The return signal is passed through an automatic gain control an...