Abstract: A spinal fixator is in the form of a turnbuckle the end sections of which terminate as circular flat plates formed with upwardly and downwardly protruding spikes for engaging in the bone of respective vertebrae above and below a broken vertebra. Following decompression of the spinal cord, the fixator is inserted and extended to engage the spikes in the respective vertebrae and thereafter holds the spinal cord decompressed.

Abstract: A test head for electron spin resonance and paramagnetic electron resonance measurements comprises a resonator of circular cylindrical shape adapted to accommodate a coaxially arranged test tube, and a waveguide arrangement for exciting the H.sub.011 wave in the resonator, said waveguide arrangement comprising one section having its one end arranged adjacent one face of the resonator and communicating with the resonator via an opening provided in the face in eccentrical arrangement relative to the resonator. In order to enable the coupling coefficient to be varied and, thus, the resonator to be adapted to the waveguide section, the waveguide section carrying a H.sub.1n wave communicates with the resonator via a coupling slot the angular position (.phi.) of which can be varied relative to the radial plane of the resonator passing through its center. Preferably, the waveguide section exhibits a circular cross-section and can be rotated about its axis. It guides the H.sub.

Abstract: A color photoprinter having a scanning light source and automatic control of contrast excursion limits and exposure level is disclosed. The printer is particularly well suited to contact printing with opaque image receiving materials. A prescan of the original photographic transparency, only, is made to determine the initial exposure level and contrast excursion limits to be expected on the opaque receiving material, and to establish the required automatic exposure and dodging control signals. The original is rescanned to generate signals which represent an unsharp, luminous, contrast controlling mask. These signals are retained in a memory, such as an image storage tube. The opaque image receiving material is then moved into intimate contact with the original for the actual exposing scan, which takes place with the unsharp luminous mask electronically superimposed on the scanning light source, in order to provide automatic contrast and exposure level control of the image during the printing step.

Abstract: A novel identification device permits its holder to prove his authority as holder thereof so as to largely prevent its abusive use. The said identification device consists of a handy small housing (1) comprising permanent storage means (10) with an alphanumerical character string forming a code stored therein, further input means, a word register (9) for entering an alphanumerical character string by means of the input means, a comparator (11) having connected to its inputs the permanent storage means (10) and the word register (9), and display means connected to the comparator (11) for indicating the existing or missing conformity of the two character strings as determined by the comparator. A first time function element equipped with interlocking means which at the end of a predetermined first period of time supplies an interlocking signal preventing the conformity, if existing, to be displayed, may serve to limit a period of validity of the identification device.

Abstract: The invention disclosed is the method of exact calibration of gamma ray detectors called gamma thermometers prior to acceptance for installation into a nuclear reactor core. This exact calibration increases the accuracy of determining the power distribution in the nuclear reactor core. The calibration by electric resistance heating of the gamma thermometer consists of applying an electric current along the controlled heat path of the gamma thermometer and then measuring the temperature difference along this controlled heat path as a function of the amount of power generated by the electric resistance heating. Then, after the gamma thermometer is installed into the nuclear reactor core and the reactor core is operating at power producing conditions, the gamma ray heating of the detector produces a temperature difference along the controlled heat path.

Abstract: A wave guide of an antenna feed assembly has a wave polarization rotary section comprising a plurality of closely spaced conductive pins extending across the diameter of the wave guide. A first group of such pins adjacent the output end of the wave guide to an amplifier are stationary while a second plurality of pins are rotatable about the axis of the feed in progressive steps through each pin to 45.degree. positions selectively to one or the other side of the plane formed by the stationary pins to rotate one or the other of the 90.degree. polarized waves 45.degree. into the plane of the stationary pins and thence to the amplifier. The movable pins are received in a collar rotated by a conventional motor, the pins being located in slots of varying lengths in the collar so that each rotatable pin lies at the same angle to both of its adjacent pins.

Abstract: The present invention relates to a hand-held labelling device for printing, detaching and dispensing individual adhesive labels mounted on a backing strip and for applying such labels to articles to be labelled, the label tape being guided from a reel of label tape via a counterplate to a deflecting edge and from the latter to transport means arranged in the area below the reel of label tape and comprising a transport wheel with backstop which positively engages the backing strip and which can be moved on step by step by means of an operating handle to transport the said strip, the deflecting edge being provided between the counterplate and the forward end opposite the operating handle and mounted together with the counterplate on a swing-out bottom mounted to pivot about a stationary pin provided in the rear bottom portion, the said device comprising further a pressure roller provided in front of the deflecting edge in the forward portion of the device opposite the said pin.

Abstract: The present invention relates to a box magazine for firearms, having a longitudinal housing (1), one end thereof being provided with an ejection opening for the frontmost cartridge contained in the magazine; it includes a follower, spring loaded in the direction of this ejection opening and being in a contacting relationship with the last cartridge, and with the follower spring, designed as a scroll spring (13), whose one end is attached to the housing in the vicinity of the ejection opening and whose scroll spring shaft (11, 12) is mounted on the follower (4) and whose axis is arranged at right angles to the direction of motion of the follower.

Abstract: An aerator which considerably reduces the noise, as measured in an adjacent room, resulting from a water flow through a faucet aerator, is disclosed. The aerating disc which directs the water upon one or more screens is preferably about 1.75 mm thick, and has at least 36 water passages (which may be called chambers) through the disc. The water passages or chambers are parallel to the general direction of flow of water through the aerator and have a cross-section no greater than 0.8 mm.sup.2. The upstream entrance to each chamber comprises at least two entrance openings, the aggregate cross-section of which openings is at least equal to the cross-section of the chamber.

Abstract: An intense high current, high voltage pulsed beam comprising bursts of electrons of less than 200 nanoseconds duration each, having a beam radius of about 0.5 mm. is projected through an anode consisting of a hollow tube with much smaller diameter than that of the diode tube surrounding the cathode and with diameter diminishing with deeper penetration into the tubular anode. By appropriate selections of combinations of materials, sizes, shapes, and surface treatments surrounding the beam in its travel through the anode, or by means such as ion beams directed back along the beam, or by laser pulses on selected spots inside the anode or on the cathode tip, or by controlled supply of appropriate gases or vapors through a small diameter tubular cathode, either metallic or dielectric, and separately into the tubular anode near the end farthest from the cathode and nearer the target, the beam is made to pinch down to a radius of 0.1 mm.

Abstract: A picture taking apparatus is provided which accurately positions a camera lens with respect to the object being photographed. The apparatus comprises in part an element which is supported on and moves along a track. The track has equally spaced parallel pins extending in one direction therefrom and complementary indicator marks located on one face thereof. The element has a carriage which slides horizontally along a shaft of the element which is parallel to the track. The carriage has a cam-operated plate which slides vertically in said carriage to engage and disengage said pins. When the cam-operated plate engages a pin, the carriage is "fixed". This provides a "coarse" adjustment for the position of the camera lens. For the "fine" adjustment, the element is still free to move along the track. The element can be moved along the track to "fine tune" the position of the camera with respect to the object to be photographed.

Abstract: Automatic control of exposure level and contrast correction for a photographic printer is disclosed. The printer uses dynamic masking achieved by modulating the intensity and velocity of a CRT scanning spot. A prescan is employed to evaluate the negative and establish exposure level and contrast grade excursion limits for the subsequent exposure. Different control systems are disclosed for contact printing and projection printing.

Abstract: An educational device utilizing light as the displaying medium is provided. The device has a light-impervious housing having a hole in the top and a light source therein. There is a plexiglass panel inside said housing, accessible through the hole in the top of the housing. The light source is located directly offset one edge of the plexiglass panel such that light rays from said light source enter the plexiglass panel through this edge and are entrapped therein. The housing also has slits in the sides thereof directly below the plexiglass panel so that paper inserts can be placed inside the housing directly beneath the plexiglass panel. The device is employed by turning on the light and by either inserting materials into the above-described slit or by writing on the outer surface of the plexiglass panel with a grease pencil. The light entrapped in the plexiglass panel will escape thru the top of the plexiglass panel and illuminate the inserts and the writing for the user's viewing.

Abstract: A humidifier that will operate without being supplied with power from an outside source is provided. The humidifier must be placed directly in the stream of heated air coming from a heat source in order to properly operate. The humidifier is comprised of a housing, a hydrocell, and an evaporative element. The hydrocell and the evaporative element are both located within the housing, the evaporative element being directly below the hydrocell. The hydrocell is heat-responsive, and when it is heated, water will drip from the hydrocell onto the evaporative element. The heated air passing thru the humidifier will first contact the now-moist evaporative element and absorb some of the humidity therefrom. An optional feature of this invention is a valve located within the hydrocell that is connected to a water source and which will regulate the flow of water into the hydrocell without the need of human assistance.

Abstract: This invention contemplates providing a number of sheets showing different building materials. Each different building material is illustrated in different scales on different sheets respectively. When a customer wishes to see the way his building would look with a particular building material on it, a photograph of his building is taken and one of said sheets, to the proper scale, is applied over the photograph. It would, however, overlie only that portion of the building which is to be covered by the new material. In that way the customer sees how his building will look with any or all various different materials placed over the outside of his building.When the building material, to be applied to an existing building, is available in different colors, a sheet representing the desired color may be placed between the photograph and the sheet representing the desired building material.

Abstract: In a climbing scaffolding or in a climbing formwork a guide rail (11) for the sole purpose of guiding the scaffolding during the lifting and lowering movements is provided, which is detachably secured to the concrete wall by at least two mounting parts (3, 4) for the climbing scaffolding section (6). This allows rapid lifting, and instead of a crane a lifting gear which is supported on the mounting parts can also be used for lifting.

Abstract: In a laryngeal tube for use in microsurgery in the region of the larynx, with simultaneous ventilation and anaesthesia, which, at its introduction end, is provided with a tube bearing an inflatable cuff, and which is also provided with an inflation channel terminating in the inside of the cuff, and also a ventilation channel terminating within the lumen of the tube, provision is made for the inflation channel (6) and the ventilation channel (7) to be connected together and stiffened.

Abstract: This invention describes a reflective lane marker for roads which is mounted so that the upper surface of the marker is flush with the road surface. It is so arranged as to reflect light from headlights back in the same general direction from which it comes and which can operate when covered with a film of water. Because it is flush with the road surface, snowplowing can be used without harm to the device.

Abstract: In a tube for the enteral introduction or aspiration of gases or liquids, in particular for the enteral alimentation of patients, a weighting means is affixed in the introduction end section, the said weighting means being formed of a capsule (8) which is insoluble in the stomach, but soluble in the region of the intestine. In this manner, the tubing forming the tube can be very thin.

Abstract: An identification card, comprising several laminated layers, one of which is of material capable of being magnetized, has 350 spots on it, each of which is capable of having one portion of the spot magnetized north and the other portion magnetized south. The 350 spots are divided into groups of randomly selected spots. One group, for example, represents the serial number of the card and has the portions of its spots magnetized accordingly. Apparatus for reading, and for remagnetizing the card to change the information recorded thereon, is also provided. This apparatus includes a horseshoe core (for each spot) that bridges the two magnetized portions of the spot. A "Hall effect" device detects the direction of the flux in said horseshoe core to respond to the direction of the magnetism of the portions of the spot. The polarity of the portions comprising the spot may be reversed by energizing a coil on the horseshoe core.