摘要:
A method for manufacturing a thin and flexible ribbon of superconductor material such as V.sub.3 Sn, V.sub.3 Ge, V.sub.3 Si, Nb.sub.3 Sn, Nb.sub.3 Ge, Nb.sub.3 Si and La-Au having a fine and compact microscopic structure comprises heating raw superconductor material at a temperature within the range between its melting point and 300.degree. C. above the melting point to form a melt having suitable wettability and viscosity; ejecting the melt through a nozzle under a pressure within the range from 0.01 to 1.5 atm. against a cooling surface of a moving substrate such as a rotating drum; and cooling instantaneously and very rapidly a jet flow of the melt on the cooling surface at a cooling rate of 1,000.degree. C. to 1,000,000.degree. C./sec. In order to manufacture the thin elongated ribbon of excellent configuration it is preferable to effect the cooling in a reduced atmosphere. The invention also provides the thin and flexible ribbon processed by the above mentioned process. When an intermetallic compound such as Nb-Si, Nb-Sn, Nb-Ge, V-Si, V-Sn and V-Ge is used as the raw superconductor material a thin and flexible ribbon of superconductor material having essentially a crystalline structure is formed. When La.sub.1-x (Au.sub.y Cu.sub.1-y).sub.x, wherein x>0.9, 0.ltoreq.y.ltoreq.1 is used as the raw superconductor material it is possible to obtain a thin and flexible ribbon of superconductor material having essentially a fine and compact crystalline structure mixed with amorphous of 10 to 90%.
摘要:
In an asynchronous serial printer wherein a character bearing member is mounted on a carriage which is moved step-by-step along the print line and wherein the character bearing member is continuously rotating so as to move the characters thereon through a printing position with a velocity parallel to the print line, the striking hammer firing is subjected to a temporal correction to provide for printing in the proper printing position irrespective of the displacement of the carriage from such position and irrespective of the carriage speed.
摘要:
A guide and alignment member for use in serial printing devices. The guide member makes possible a sizable increase in the number of type that may be printed in a given time frame. As the type elements approach the printing impact zone at high speed, some of them may still be oscillating from a previous impact, or may be misaligned. As these misaligned or vibrating elements move towards the impact zone, the guide member brings these elements into registry with the printing hammer. The result of this guiding process allows for greater speed of operation, since the type elements will be prevented for interfering or otherwise colliding with the striking hammer.
摘要:
A printing device comprising a continuously rotating disc having a plurality of flexible type carrying segments and a hammer for causing individual segments to move into contact with a paper on a platen. Control means are provided for actuating the hammer at the proper instant relative to the constantly rotating disc so that the preselected character is printed.
摘要:
The disclosure embodies a printing mechanism wherein type is arranged on resilient arms radially extending in a predetermined angular disposition from a continuously driven rotatable member to position the type between an actuator and an impression means.
摘要:
The gap usually required in the arrangement of type characters around the periphery of the print disc in a rotating disc printer to provide time for hammer settle-out is obviated by having two separate type arrays on the disc, one of primarily lower case characters followed by one of primarily upper case characters. To minimize reach the print hammer is movably supported so as to be shifted relative to the print position from a normal lower case position to a special upper case position so as to strike the type on the disc over two different ranges of positions - one range for lower case and a different range for upper case.