Abstract: X-ray apparatus for examination of a patient comprises an upright standard, a patient table extending laterally from the standard, a two-limbed support carrying an X-radiation source on one limb and an X-radiation receptor on the other limb and a generally horizontal arm pivoted at one end to the standard on a first vertical axis and extending from the pivoted end at the standard to a free end connected to the two-limbed support so as to hold the source and receptor on a radiation axis through the table, the arm being articulately jointed intermediate the standard and support so as to selectively position the support at either side of the table.

Abstract: Electronic apparatus for receiving amplitude or frequency modulated facsimile signals detects the instantaneous value ( i.e., the amplitude or frequency) of the modulation by a circuit including means detecting the modulation value in each cycle of the signal and producing a gating signal corresponding in duration to the detected modulation value, a generator of clock pulses higher in frequency than the signal, and a modulator responsive to the clock pulse and gating signal to pass a number of clock pulses commensurate with the modulation value to a counter which generates a marking signal commensurate in amplitude to the modulation value for application to a facsimile recorder.

Abstract: An electronic system for processing graphic teletype coded signals or graphic facsimile signals in different modes of frequency modulation comprises two filter channels passing different frequency modulated or keyed bands, two filter channels respectively passing signals from the two bands to a pulse shaper which produces a pulsed signal corresponding to the outputs of the filter channels, and channels respectively coupling the output of one filter channel and of the shaper to a facsimile recorder.

Abstract: A method of recording the varying gray shades of a facsimile signal line by line with a thermal print head having a linear arrary of heating elements sorts out the individual pixels of a facsimile signal line according to their gray shade in a scale of 1 to 16, and to their line position, into a number of separate series of pixels, each series representing a different gray shade. The 16 different series are stored and read out of a memory in their separate series, and as the separate series are applied to a thermal print head the marking energy is varied 16 times from series to series corresponding to the gray scale of the original signal. Thus 16 successive series of pixels are marked on the same line of a thermosensitive paper to reproduce all the gray shades.

Abstract: A monochromatic spectrometer for evaluating contamination changes in the surface condition of lenses, reflectors and similar optical samples in the vacuum of a space mission includes a vacuum ultraviolet beam source redirected from a dispersion grating through a test station and reflected from a mirror to a photodetector. A rotatable carrier supports two or more optical samples, both transmissive and reflective and selectively positions one sample at a time at the test station so that the selected sample modifies the VUV beam according to its surface condition. The mirror is movable from a first position in which it reflects the beam transmitted through a sample to second position in which it reflects the beam reflected from a sample. The sample condition measured by the photodetector, the position of the rotatable carrier and mission elapsed time are recorded in a memory for re-transmission or later read out.

Abstract: A rotary router bit for smoothing the edges of a sheet of abrasive or easily splintered material has two collars axially spaced on the router shank. Each collar has peripheral cutting teeth overlapping opposed teeth of the other collar and inclined at a shearing angle with respect to the axis of the shaft. The teeth extend oppositely toward each other and are formed around a central open space between the teeth and the shank into which chips from the sheet are fed so as not to clog the cutting edge of the teeth but so as to allow for subsequent ejection from the bit.

Abstract: According to the invention a high voltage electrical coupling for attachment through a wall comprises a coupling body around a high voltage conductor and having a flange abutting one side of the wall and an external thread extending from the flange through the wall; and a nut with internal threads screwing onto the external thread and a face abutting the other side of the wall; wherein at least one of said body and nut is of dielectric material and the nut has air channels in its abutting face extending outwardly from its internal threads to its exterior for releasing air from the threads and face when the nut is screwed into abutment with the wall.

Abstract: In medical X-ray apparatus including a stand mounting an X-ray tube and two X-ray receptors such as an image intensifier and a film exchanger, the two X-ray receptors are mounted on a common frame pivoted to present either receptor at the image plane of the X-ray tube. Additionally the two receptors slide on the frame and are linked by a bell crank for coordinated rotation and sliding movement which restores their common center of gravity to its initial locus as one receptor is interchanged for the other. Balance of the receptors with the X-ray tube on the frame is thereby maintained.

Abstract: Apparatus for sensing smoke in a duct includes a housing with inlet and outlet ports and a flow chamber which directs gas flow on a path between the ports and to and from a smoke detector. A vaned rotor on the path is visible through a window in the housing gives a visual indication of the existence or nonexistence and direction of gas flow and thus whether or not normally flowing duct gas is being sensed.

Abstract: An X-ray apparatus is disclosed comprising an angularly adjustable parallelogram formed by two members parallel to a central axis and two members transverse the central axis. A radiation source and a radiation receptor are positioned at one end of the respective parallel members. The apparatus is characterized in that the two transverse members are disposed on opposite sides of the central axis, and one end of both parallel members is offset to the same side of the central axis.

Abstract: Apparatus for draining the static charge from an operator handling discharge-sensitive electronic components has an electrode module applied to the operator's wrist connected to a grounding module by a two conductor loop which includes a lamp, a battery and a switch which, when closed, lights the lamp if one of the conductors is continuous between the electrode and grounding terminal.

Abstract: A system for recording facsimile or teletype signals includes a switch connecting either signal to a graphic printer recording in raster format and means converting the teletype signals into raster format for recording on the same printer as are the facsimile signals.

Abstract: A high voltage electrical coupling has two parts, each with spaced mating conductors, one part forming a socket shaped to receive the body of the second part. The second coupling part has an elastic, insulative support forming sleeves around its conductors and a slot between the sleeves. The first part has an insulative barrier wall extending between its conductors and fitting in the slot of the second part. Either the socket of the first coupling part or the elastic body of the second part are tapered into the socket so that the elastic body is compressed against the barrier wall as the parts are mated, thereby squeezing closed any possible air path along the surfaces of the barrier wall.

Abstract: In a facsimile recorder a traversing print head is detachably coupled to a cable by a ball on the cable which is seated on the print head by a spring detent with camming ramps which allow automatic disengagement and reengagement of the ball and head and also rotation of the ball in the seat of the head.

Abstract: An X-ray system has radiation carriage for an X-ray source and receptor and a table carriage for a patient. The radiation carriage moves along a circular track on a primary carriage which in turn is on a beam rotating on a standard so that a patient at the isocenter of the two circular movements can be X-rayed at adjusted angles from spherical loci. The beam also pivotally supports a table carriage so that as the patient is inclined with the table the adjusted angle of the radiation is maintained.

Abstract: An X-ray tube and receptor are held on opposite ends of a two-limbed carriage mounted on a sliding arm. The arm is carried on a rotating support, the arm extending parallel to the rotational axis of the support. The two-limbed carriage pivots on the arm about a second axis perpendicular to the rotational axis and to a radiation axis extending between the X-ray tube and receptor.

Abstract: In an X-ray system with a rotating disk having sector slits transmitting fan shaped X-ray beams from a source through a subject to the image area of an X-ray receptor an improved ratio S/P of X-rays (S) scattered from the subject to primary rays (P) forming a true image of the subject at the image area is realized if the dimensions of the system fall within the following ranges of dimensionless ratios:(1) DW/RL is less than 0.5;(2) D/L is greater than 0.15;(3) LS*N/WD is greater than 0.15 and less than 0.6 whereinD is the distance of the disk from the X-ray source,W is the width of the X-ray image area spanned by the narrow beams,R is the radius of the disk,L is the distance between the X-ray source and the receptor.S* is the radially outermost slit width in the X-ray beam, andN is the number of slits whose beams simultaneously intersect the outer edge of the image area.

Abstract: An optical block for the exciter lamp and photocell includes a base with a first seat holding the lamp on a first optical axis and a second seat holding the cell on an intersecting optical axis. A cover with two light passages along the axes has a socket into which the base snap fits to confine the lamp and cell in their seats.

Abstract: A high voltage CRT anode electrical coupling has a connector with several spring contact fingers extending from a base and an insulating ring around the connector between the base and fingers. An insulative shroud is molded around ring and base leaving the fingers unconfined.

Abstract: Scatter is reduced in an X-ray system by a relatively large light- or X-radiation-opaque mask rotating on a first axis and carrying smaller, radiation-opaque masks rotating off the first axis. The smaller masks have elongate radiation windows which are held parallel to each other and to a fixed plane through the first axis by translative drive and driven wheels on the larger and smaller masks coupled by a flexible linkage belt.