| Patent Number |
Title Of Patent |
Date Issued |
| 4346780 |
Purging pipes under noise-attenuating conditions |
August 31, 1982 |
| Noise attenuation during the purging of pipes by means of steam blowing is achieved by the use of a receptacle into which steam is blown upon discharge from one end of a pipe; a linkage pivotally suspends an exchangeable mouthpiece adjacent to a front end opening of the receptacle an |
| 4335969 |
Print head |
June 22, 1982 |
| A guide member for print needles and a base plate with guide apertures traversed by the rear end of the needles are bolted to a magnetic core element, having annularly arranged poles; a cover is also bolted thereto, sandwiching a case in between. The cover centers an annular element havi |
| 4333347 |
Stimulating electro-acoustical transducers |
June 8, 1982 |
| A transducer for launching ultrasonic test signals is stimulated by an electrical signal which is of trapezoidal contour. Particularly the trailing edge of the signal is to decline at a rate similar at least as to order of magnitude to the rise time, and occurring in synchronism with a |
| 4326699 |
Oil-tempering apparatus for pipes |
April 27, 1982 |
| Hot pipes are tempered in an oil bath contained in a tapered, covered pan; a flap is temporarily opened for feeding, but closed when oil vapor develops, to be sucked off without contaminating the environment. Pan and cover structure are supplemented to prevent uncontrolled escape of vapo |
| 4325130 |
Reprogrammable control apparatus |
April 13, 1982 |
| An electrically programmable and erasable ROM (EPROM) is accessed via a selector and an address counter, all mounted on a PC board which includes also a regular VCC bus. The EPROM output lines feed an output circuit, parts of which may be on other boards. The board, however, has addition |
| 4317348 |
Making contoured hollows |
March 2, 1982 |
| A hollow blank, such as a tube, is inserted in between two dies and is also received by two retractable die members. The interior of the blank is closed off, but working fluid is admitted to widen the blank. Widening is at first restricted to a central portion established by conical fron |
| 4313328 |
Providing cardan and universal joint-type shafts with gearing |
February 2, 1982 |
| A hollow, tubular blank is provided with annular, radially inwardly and/or outwardly extending protrusions by means of rolling or upsetting. These protrusions are provided with gearing teeth by means of an annular drawing die and a plug, one of these or both being provided with a gearing |
| 4312206 |
Making a seamless, spherical case |
January 26, 1982 |
| A tubular blank is held in a bed, heated on one end, which is then rolled into a semisphere with an integral nipple; an adjacent portion of the blank is subsequently heated and stretch-formed by rolling to obtain a spherical continuation of the semisphere, being continued in a cylindrica |
| 4311905 |
Film strip positioning for X-ray testing of pipes |
January 19, 1982 |
| An apparatus for X-ray testing of pipes following ultrasonic testing includes a reversible roller track for telescoping a pipe upon a cantilever arm which can be moved up and down on a stand and carrying an endless belt with resilient U-shaped holders for supporting film strips to be |
| 4311472 |
Marine propulsion system for two propellers |
January 19, 1982 |
| Two separately operable turbines are regularly connected individually to two propellers, via reducing gears in each instance, whereby an intermediate shaft is included in each such power train. These intermediate shafts are interconnected via an interconnecting transmission gear with |
| 4311066 |
Reduction gear and speed control for dredge pumps |
January 19, 1982 |
| A high-speed drive shaft is connected to dredge pump shaft by a planetary gear, upon which a controlled speed is superposed, by branching power off the high-speed shaft for driving an auxiliary adjustable pump which, in turn, runs a hydrostatic motor whose rotary output is connected to t |
| 4309914 |
Controlled transmission system |
January 12, 1982 |
| A ship drive system with main engine, main transmission and propeller shaft is supplemented by a transmission branch permitting power transmission in both directions. The branch includes an auxiliary engine, an a.c. generator selectively connected to that auxiliary engine and a controlle |
| 4305639 |
Plug connection between a thermofeeler and a holder |
December 15, 1981 |
| The plug in U.S. Pat. No. 4,165,995 is improved as to the contact carrier by providing slots in an orientation so that thermocouple leads can be laterally inserted before hanging over ridges for contact-making with annular contacts of a socket member in the holder. The orientation of the |
| 4305334 |
Tube-type product conveyor apparatus |
December 15, 1981 |
| The invention relates to conveyor apparatus, particularly for use in conveying large quantities of heavy bulky and/or dry materials over a long distance. Moreover, the apparatus of the invention may be constructed in out-of-the-way areas over deteriorated or difficult courses, such as |
| 4305297 |
Ultrasonic testing of weld seams of pipes for detecting transversely extending defects |
December 15, 1981 |
| Ultrasonic test equipment for testing the welding seam a thick wall includes transducers arranged in tandem and along the welding seam, whereby a tandem pair inspects in any instance two surface-near zones (inner and outer surface) as well as an interior zone. One of the transducers |
| 4304387 |
Suspension of pipes or tubes |
December 8, 1981 |
| A tube or pipe for the conduction of hot fluid is suspended in the vertical by means of an anchor, pivotally linked to the long arm of a two-arm lever which is pivoted on the tube or pipe and has its second, short arm linked to a pivot-near point of a one-arm lever, and is in line with a |
| 4304152 |
Power and torque branching in a planetary gear system |
December 8, 1981 |
| The planetary gear system includes two parallel operating planet gears interposed between an input and an output shaft, with a common planet gear carrier secured to the output shaft and two telescoped intermediate shafts for the sun gears. These intermediate shafts are resiliently mounte |
| 4296638 |
Sampling molten metal |
October 27, 1981 |
| A ceramic body includes a disk-shaped mold cavity in its upper part and a slag retention chamber underneath; these chambers are interconnected by a duct extending downward from the bottom of the mold and being continued by a ceramic tube traversing centrally the retention chamber and end |
| 4296207 |
Antifreeze protection of roads |
October 20, 1981 |
| Residue from dressing bauxite is mixed with NaCl and ground; polyurethane foam is ground and mixed with CaCl.sub.2 ; a silicon organic compound and quartz powder is added to one or both of the ground mixtures; the grains are embedded in bituminous material or asphalt to be used for makin |
| 4291585 |
Device for sampling molten steel |
September 29, 1981 |
| A device for sampling molten steel is provided with a mold cavity and an inlet path which includes a floatation-type slag separation chamber. A ceramic sieve is disposed at the outlet of the separation chamber to prevent large slag particles from passing through while trapping small |
| 4287223 |
Covering a steel pipe having a welding seam with a thermoplastic coating |
September 1, 1981 |
| A steel pipe with a thermoplastic cover has the coverage of a welding seam reinforced by hot air heating the cover along the plastic and extruding a strip of similar plastic thereon, followed by cold water spray cooling. The pipe is centered as to the position of the welding seam vis-a-v |
| 4274867 |
Method for producing low-carbon steel from iron ores containing vanadium and/or titanium |
June 23, 1981 |
| Methods are provided for producing in a single method low-carbon steel, while at the same time selectively obtaining a slag high in vanadium content for separate applications. Moreover, the method allows for the separate production of a slag high in titanium content if the starting m |
| 4274864 |
Making iron powder |
June 23, 1981 |
| Iron powder of high compressibility and low bulk density is made by atomizing a stream of molten steel by means of a conical jet of water at a rate in excess of 10 cubic meters water per metric ton of steel, the half cone angle is between 40.degree. and 60.degree., preferably 45.degree.; |
| 4268203 |
Receiving and collecting pieces of stock such as rods or tubes |
May 19, 1981 |
| At the end of a downwardly slanted track, a duct of S-shaped cross section is provided to receive tubes and rods. The duct wall members are cushioned and can be tilted apart; belts are disposed across the bottom of the duct and are gradually released to form receiving loops which increas |
| 4266896 |
Deburring tubes or pipes on the inside |
May 12, 1981 |
| A tubular cutter with flared end and circular edge is obliquely held and centered by resilient guide elements, one in line (axially) with the edge, the other one acting radially opposite and axially between the first one and the edge. The edge has a larger diameter than the cutter is lon |
| 4264355 |
Methods for producing steel from iron sponge in electric furnaces |
April 28, 1981 |
| A method is provided for producing steel in an economically acceptable fashion from iron sponge with less than 66% Fe and with high acid slag formers. This is achieved by first determining the acid slag forming composition of the iron sponge, and, thereafter, lining an electro-slag-r |
| 4259137 |
Jacketing steel pipes by means of wrapping a ribbon helically around the pipes |
March 31, 1981 |
| A pipe jacketing and wrapping station includes a pressure roll, urging an extruded ribbon onto axially passing, rotating pipes, arriving in end-to-end abutment. Feelers determine level differences of the pipes adjacent to the pressure roll and cause the end of the trailing pipe to be |
| 4256165 |
Stirring of molten metal core in a casting as withdrawn from a machine for continuous casting |
March 17, 1981 |
| One or more electromagnetic stirring elements are mounted on arms and/or holders, extending from a carriage which runs on a stationary bed and in a direction transversely to the direction of casting. The stirring elements are either directly positioned in the direction of carriage moveme |
| 4255062 |
Matrix print head |
March 10, 1981 |
| A print head for matrix printing has twelve needles whose front ends are arranged in three columns and seven rows, whereby the middle one holds only two needle ends in the second and sixth row, while the other row positions each of the two outer columns hold one needle tip. This arra |
| 4244419 |
Electromagnetic stirring apparatus |
January 13, 1981 |
| An electromagnetic stirring apparatus for stirring the liquid center core of a continuous casting. The casting is supported by and transported over guide rolls while a changing electromagnetic field is induced within the liquid casting core by induction coils positioned beneath the casti |
| 4240281 |
Automatic self-checking of test equipment |
December 23, 1980 |
| Equipment for ultrasonic testing structural materials includes transducers and test electronics normally operated in sequential test cycles each cycle including the generation of a test pulse to be sent into the test object and subsequently, upon interaction with the test object, return |
| 4238963 |
Test head for ultrasonic testing of structural material |
December 16, 1980 |
| The test head includes its own calibration device in form of a wire or a bore in front of the transducing surface so that a distinguishable calibration echo is always available. |
| 4238205 |
Making of pilger roll |
December 9, 1980 |
| The grinding wheel and roll are particularly positioned to each other on the basis of parameters representing the local slope changes of the roll groove and its deviation from a semi-toroidal groove. The grinding wheel can be moved in two orthogonal directions, one being transversely to |
| 4234261 |
Printer |
November 18, 1980 |
| The printer is provided for alternative use with long webs or individual, precut forms; it includes two friction roll drives adjacent to the print head and platen, and a sprocket drive upstream, being permanently engaged with a perforated web. The drives operate in synchronism but do not |
| 4229990 |
Transmission of ships |
October 28, 1980 |
| An engine driven shaft is connected to an input gear of the transmission which, in turn, is geared to a power branching cascade, providing either for axial branching first followed by lateral branching or a reverse sequence of branching, obtaining in either case four outputs provided by |
| 4220277 |
Axle bodies |
September 2, 1980 |
| An axle body is made by extruding a blank for forward extruding a neck portion and backward extruding a hollow shell portion, a transition zone is also produced by forward extrusion; the resulting shell portion is rolled into a nonround cross section, of, possibly, different wall thi |
| 4217770 |
Drawing hollow blanks in multiple steps |
August 19, 1980 |
| Plural dies for stepwise drawing a hollow blank on a mandrel are spaced so that a downstream die is placed at a location where the drawing strain from the previous die has been reduced to zero because the tensile stress in the deforming zone is balanced by adhesion to the mandrel. |
| 4214468 |
Hot rolling pilger mill |
July 29, 1980 |
| The feeder and the rolls are operated by separate cranks to avoid obstruction of the area in which the hollows are connected to the feeder. The two cranks are either separately driven or connected to a common drive; in either case, synchronism is maintained, and, preferably, an alter |
| 4213777 |
Making iron powder having fiber-like particles |
July 22, 1980 |
| Iron oxide powder, e.g., ore, is reduced in a CO/N.sub.2 atmosphere at a temperature between 750.degree. to 1200.degree. C., whereby prior to the onset of precipitation of metallic iron the content of H.sub.2 is limited to 15% (vol) of the CO content, and SO.sub.2, H.sub.2 S, COS or anot |
| 4211272 |
Cooling of ingots or castings |
July 8, 1980 |
| Ingots or castings are supported by fairly closely spaced rollers. The resulting spaces adjacent to exposed surface portions of the ingot or casting are filled with atomized water to generate a fog or mist being retained so that as much water droplets as possible vaporize by heat rad |
| 4206511 |
Locating a welding seam |
June 3, 1980 |
| The welding seam of a pipe is located by means of ultrasonic transducers and echo pulses responding particularly to rather minute distance differences on account of the convex contour of the seam and its elevation above the continued contour of the unmodified parts being welded together. |
| 4204880 |
High speed cooling of ingots |
May 27, 1980 |
| Ingots to be cooled from above and below arrive on a reversible roller track and are moved back and forth for different lengths so that the ingot advances stepwise in the forward direction. Longer dwell times are interposed on each reversal. |
| 4197013 |
Calibration of dust monitoring instruments |
April 8, 1980 |
| Disclosed is a method and apparatus for calibrating and recalibrating a photometric measurement instrument which supervises the presence of dust in a particular location as produced by a process during which dust is developed on an irregular basis. The method is characterized in that the |
| 4194555 |
Tundish for continuous casting |
March 25, 1980 |
| The tundish is mounted on a frame which can be lifted in relation to a carriage. A holder for a casting pipe is either positioned on the frame to be lifted therewith or on the carriage to be controlled in synchronism with the frame lifting so that the pipe retains its position relative t |
| 4184839 |
Roller track for pipes |
January 22, 1980 |
| The roller track for moving large pipes through a tempering furnace includes two pairs of relatively closely spaced, resiliently mounted rollers disposed in the end zone of the furnace, where any portion of the pipe passing through is hot and has minimum strength on account of the he |
| 4182200 |
Transmission gear with power branching |
January 8, 1980 |
| Fourfold power branching for each propulsion mode (forward and reverse) requires recombining on a single output shaft which is carried out via two large gears mounted separately on axially spaced hollow shafts, one being traversed by the output shaft whose end is coupled centrally to the |
| 4182154 |
Initializing ultrasonic test equipment with a particular reference element |
January 8, 1980 |
| A tubular sleeve with reflector body, water ingress and venting openings is used to produce specific echoes of a test signal launched by an inserted transducer. Amplitude and transit times of the element serve as a transferable standard. |
| 4179887 |
Hydraulic control with delay |
December 25, 1979 |
| Two hydraulic brakes or clutches being primary users, are alternately, delayedly, hydraulically energized from a constant volumetric flow rate pump feeding also a secondary user via a pressure controller with a differential piston operated by feedback ducts from the primary users via |
| 4178200 |
Pressure roll for jacketing steel pipes with thermoplastic strip |
December 11, 1979 |
| A roll or roller for urging extruded thermoplastic strip onto an axially advancing, rotating pipe is constructed from a silicon rubber core with a shore hardness of 40 and having a softer silicon rubber jacket with a shore hardness not exceeding 30. The core is traversed by axial bores. |
| 4177661 |
Method and apparatus for bending large pipes |
December 11, 1979 |
| A process for bending large pipes comprises the steps of progressively and inductively heating the wall of a pipe within the region to be bent. The penetration depth of the heat energy is varied over the circumference of the pipe through shielding. The inner radius of the pipe to be heat |
