摘要:
Apparatus for developing latent images of X-rayed objects on dielectric receptor sheets has a carrier which advances receptor sheets along a circular path about a horizontal axis. A tank with an open top is installed below the six o'clock position of the carrier and contains a horizontal developing electrode having narrow elongated channels extending in parallelism with the axis of the carrier. A pump draws liquid developer from a vessel in which the tank is confined and admits the developer into the bottom zone of the tank wherein the developer rises to fill and flow above the channels of the electrode and to thereby contact the latent image of a sheet on the moving carrier. The surplus of liquid developer overflows the upper edge of the tank and returns into the vessel. The electrode is movable up and down by rotary eccentrics to thereby influence the development of latent images, especially the development of outlines of dark portions of the images.
摘要:
An ionography imaging chamber for use in the cassette of an X-ray apparatus has a flat prismatic pressure vessel defining an interelectrode gap for compressed high Z gas and a dielectric charge-receiving sheet which is to be exposed to a pattern of X-rays. The pressure vessel fits into the compartment of a strongly deformation-resistant jacket having a centrally located sleeve consisting primarily of polyurethane foam, a thin tubular inner envelope which consists at least in part of convoluted fibrous material, and a thin tubular outer envelope which also consists at least in part of convoluted fibrous material. That envelope which takes up compressive stresses has a layer of carbon epoxy fibers. The other envelope takes up tensional stresses and contains Kevlar fibers. The pressure vessel has two flat tray-shaped main portions which consist of polyurethane foam. The main portions of the pressure vessel and/or the sleeve of the jacket may be strengthened by inserts consisting of metal or a synthetic plastic material with fibrous reinforcements embedded therein.
摘要:
Sheet-like dielectric receptors which are to be exposed to object-modulated X-rays in the interelectrode gap of an ionography imaging chamber are attached to sheet-like carriers so that the carriers extend laterally beyond the reactors. The carriers are thereupon transported through the interelectrode gap and through successive stations of a xerographic printer which renders the latent imges of objects visible and subjects the receptors to other treatment. The carriers can be attached to receptors by resorting to an adhesive, by the application of electrostatic charges and/or by causing the marginal portions of the carriers to engage the receptors by suction. The carriers are provided with semiconductive layers whose surface resistance can be varied at or prior to entry of carriers and attached receptors into the various stations; this can be achieved by utilizing semiconductive layers whose resistance can be influenced by changing the pressure of the surrounding atmosphere or by utilizing photosensitive layers whose resistance changes in response to exposure to light. The layers are regenerated upon separation of finished receptors so as to allow for renewed use of the respective carriers.
摘要:
An ionography imaging chamber wherein the front side face of the pressure vessel is immediately adjacent to the foremost portion of the interelectrode gap and the image-receiving part of a dielectric receptor sheet in the gap extends into immediate proximity of the front side face. The front part of the margin of the sheet is bent over the front edge portion of one of the electrodes, and the gasket which seals the interelectrode gap while the latter is filled with compressed high Z gas abuts against the folded-over front part of the sheet. The sheet is attached to a drawer which carries one of the electrodes and is insertable into a compartment of the main section of the pressure vessel. One or more auxiliary electrodes are installed in the foremost portion of the gap to prevent distortion of latent images in the region which is nearest to the front side face of the pressure vessel.
摘要:
An ionography imaging chamber for use in X-ray systems wherein dielectric receptor sheets are introduced into an interelectrode gap of the imaging chamber and the gap is filled with compressed high Z gas during imaging of an object onto a sheet in the chamber so that the sheet is provided with a latent image of the object. The chamber has a gate defining an arcuate channel for introduction of receptor sheets into and evacuation of sheets from the interelectrode gap. In order to prevent escape of high Z gas into the atmosphere and/or penetration of air into the gap, the gate has one or more orifices for admission of a compressed buffer gas (for example, CO.sub.2 gas) which is readily separable from the high Z gas whereby the buffer gas flows toward and away from the gap and mixes with high Z gas which tends to escape from the gap by way of the channel. The gate is further formed with one or more second orifices which evacuate the mixture of buffer gas and high Z gas from the channel between the first orifice or orifices and the gap. The gap is sealed from the inlet of the channel by one or more inflatable seals before the pressure of high Z gas in the gap is raised preparatory to exposure of a receptor sheet to X-rays.
摘要:
A transporting device, preferably for transporting workpieces (1) between processing stations, the device comprising an upright (2) and at least one holding device carried by upright (2) for receiving workpiece (1), the holding device (3) having again at least one holding element (4) adapted for engagement with the workpiece (1), is designed and constructed to obtain a faster timing sequence with smallest possible floor space requirements, in particular within the scope of treating foundry cores and molds, in such a manner that the holding device (3) is continuously rotatable about a vertical axis (5), so that the holding element (4) describes a substantially circular path.
摘要:
An easy-to-disassemble vertical gas diffusion electrode, assembly of sandwich type construction is provided with a gas feed tube to the highest point and a discharge line from the lowest point of the electrode and is operated with its gas chamber held under a weak vacuum.
摘要:
An apparatus for the generation of an inductively excited ion or plasma source includes an amplification system and a high frequency excitation coil which are coupled to form a self-starting free-running excitation oscillator.
摘要:
For slow motion playback operation with a digital video magnetic tape recording and reproducing equipment an intermediate memory system has four picture field memories of which there are always three available for writing into but only one of them at a time is in read-out operation. In a first reading operation of a particular picture field memory an AND correlation of a write flag and an error flag is necessary for providing an error recognition signal to following circuits and before a reading goes to the next address the write flag is erased by writing in a logic zero, but the correlated signal is used to rewrite the error flag in the error flag memory. In subsequent readings any error flag is transmitted and rewritten, but all write flags remain erased to signify that the memory has been read out at least once.
摘要:
The invention relates to an inductively excited ion source with a vessel (1) around which a coil (2) is wound. The vessel (1) consists of a chemically inert material and is used to receive the substance to be ionized. A high-frequency generator (12) is connected by one of its terminals to the coil (2) both ends of which are grounded, while the other terminal (22) is also grounded. The length of the coil (2) which is to be regarded as an electrically long conductor, is .lambda./2, .lambda. being the wavelength of the voltage of the high-frequency generator (12) (FIG. 3).