Abstract: A high-voltage power supply unit having electrical components encased in insulating casings which are biodegradable. The insulating casings comprise several superimposed layers, joined together, of sheets of paper, the number of layers being chosen in order to obtain the desired amount of electrical insulation to suit the strength of the electric field surrounding the insulated electrical components when the unit is in operation.This has a application to providing power to X-ray sources.

Abstract: When the display system is calibrated, digital test image delivered as input to system provides a resulting image perceived the human eye as being composed of a plurality individual elements which themselves are composed two grey levels and have the same contrast from element to another.

Abstract: Mobile radiography device of the type comprising a chassis with wheels, an X-ray generator and a container for a plurality of cassettes each containing a film which is sensitive to X-rays and intended to be developed in a processing room. The cassette container can be separated from the mobile radiography device for the transport of the cassettes to the processing room, the container comprising rolling means and means for gripping by an operator.

Abstract: The HT power supply unit modular support according to the invention comprises functional housings intended to accommodate the functional elements of the power supply unit, the insulating walls of which are formed by two protruding walls (2, 3) having overlapping complementary inclined surfaces (5, 6). Application to HT power supply units for X-ray sources.

Abstract: A switch having a contact lever and a compression member connected so as to bias the contact lever into a contact position. The contact lever includes a joint-receiving opening disposed therein. A bearing is insertable into the joint-receiving opening of the contact lever and supports a pivot which forms a connection between the compression member and the contact lever. The joint-receiving opening includes two portions configured one behind the other in the direction of compression of the compression member. The bearing is insertable into the first opening portion in a direction different from the direction of compression and then movable in the direction of compression to produce an interlock connection with the second opening portion of the opening.

Abstract: An earth-leakage circuit breaker has a totalizing current transformer, a magnetic trip device and switchgear with main current contacts for the main leads. A current-signal generator, a current sensor, a time-signal generator and an electronic timer wherein the switching value and response time of the circuit breaker are measured at predetermined intervals, compared with reference switching values and response times and, if these reference values are exceeded, an alarm is promptly given. During the measurement, a locking device prevents the main current contacts from opening and/or when predetermined limiting switching and response times are exceeded, the locking device opens the main current contacts and subsequently acts as a lock preventing the contacts from closing again, which is equivalent to fail-safe behavior. In addition, the switching value of the circuit breaker is multiplied by its response time and the product, which may exceed a particular constant value, is used for monitoring purposes.

Abstract: A foot transport device for fastening to a foot, in particular, a roller skate. The device has a sole portion 2 to which is affixed a plurality of wheels 22, 54 arranged successively in tandem along the longitudinal length of the sole portion. A removable stabilizer is arranged on either side of the sole portion to allow the unskilled to learn to use the device. The stabilizer protrudes laterally outwardly of the wheels. The stabilizer may comprise wheels 50 or an outrigger blade 62.

Abstract: A concrete mixer in this invention comprises an elastomeric lug belt carried by a first set of roller drums at least one of which is driven, the lug belt having a plurality of spaced elastomeric lugs thereon, and an elastomeric base belt carried by a second set of roller drums and depending between two of these roller drums to form a part-loop portion, at least one of the base belt roller drums also being driven to drive the lug belt past the base belt in a mixing zone in the part-loop portion, such that the base belt moves in the opposite direction from the direction of movement of the lug belt.

Abstract: Sheets of a vessel or other construction are joined edge to edge by deforming an edge of each sheet to have a projection from one face of the sheet, the deformed edge is entered into a slot of a joining strip and the outstanding projections are moved across in the slot so that they engage against an abutment extending into the slot from a surface of the strip. Another surface of the strip has teeth extending into the slot. A key, having teeth complementary to the slot teeth, is inserted into the slot to bear against the other face of the sheet and thereby maintain the engagement of the projections with the abutment. The ends of the joining strips are then clamped with such pressure that sliding of the sheet edge within the slot is inhibited and the slot is prevented from opening by clamping forces exerted by and within the assembled structure.

Abstract: Sheets of a vessel or other construction are joined edge to edge by deforming an edge of each sheet to have a projection outstanding from one face of the sheet, the deformed edge is entered into a slot of a joining strip and the outstanding projections are moved across in the slot so that they engage behind an abutment existing in a wall of the slot, and a key is also inserted in the slot to bear against the other face of the sheet and thereby maintain the engagement of the projections with the abutment. The ends of joining strip are then clamped between clamping blocks with such pressure that sliding movement of the sheet edge within its slot is inhibited and the slot is prevented from opening, e.g. upon impact forces.

Abstract: A table frame assembly has four frame members, four end brackets and four stay brackets, all to be secured to the under surface of a table top, the end brackets being diagonally disposed and joining the adjacent ends of the frame members, four legs, pivot means between the ends of each leg and a respective end bracket, and four articulated links interconnecting the respective legs to respective stay brackets arranged to also be secured to the under surface of the table top.

Abstract: A carton handle comprises a monolithic moulding of plastics material having a base portion and a pair of hinged portions hinged thereto, said portions all having retaining flanges which retain the handle to a carton, the flanges engaging inner and outer faces of the material of which the carton is formed.

Abstract: A post or dropper is formed from a strip of sheet metal to have a pair of webs in a "V" formation terminating in parallel flanges, there being at least one pair of apertures in the side walls, at least one wire retainer loop of general "U" shape having inturned ends which engage the apertures, and at least one pair of notches in the parallel flanges which retain a fence wire to the post.

Abstract: A process of moulding a product (and a product thus formed) wherein particulate ligno-cellulose such as shredded paper, flour, Portland cement, a small amount of caustic soda, and water are mixed together, placed in a mould, and subjected to both pressure and heat until set, and the moulded product is then removed from the mould.

Abstract: An apparatus and method of producing a parallax stereogram, i.e., free vision stereogram, and particularly for the accurate registration of a plurality of film images in order to ensure stereographic reproduction. The images on a film strip are optically viewed to establish homologous points for each film frame image. In one embodiment two images are optically superimposed to establish a stereo base distance. Each film frame is marked in accordance with the homologous points or stereo base distance. The marking may be mechanical or optically generated. Each film frame is thereafter aligned or sensed while in an enlarger, the marks establishing the accurate registration of each frame. Each film frame is exposed onto a photosensitive material using a movable line grid. A lenticular screen is superimposed over the developed picture to form the stereoscopic photograph.

Abstract: An apparatus and method of producing a parallax stereogram, i.e., free vision stereogram, and particularly for the accurate registration of a plurality of film images in order to ensure stereographic reproduction. The images on a film strip are optically viewed to establish homologous points for each film frame image. In one embodiment two images are optically superimposed to establish a stereo base distance. Each film frame is marked in accordance with the homologous points or stereo base distance. The marking may be mechanical or optically generated. Each film frame is thereafter aligned or sensed while in an enlarger, the marks establishing the accurate registration of eaach frame. Each film frame is exposed onto a photosensitive material using a movable line grid. A lenticular screen is superimposed over the developed picture to form the stereoscopic photograph.