摘要:
An endless tape for an impact printer is provided with separate groups of flexible fingers which project laterally from and along one side edge of the tape. The fingers of each groups are formed integrally with a common base and the base is removably attached in face-to-face relation to the tape. The ''''grain'''' of the material of the tape extends longitudinally of the tape in order most effectively to resist tape breakage due to the flexing of the tape as it is travelled along its endless path, whereas the grain of the material of the groups of fingers extends longitudinally of the fingers likewise to maximize their lives incidental to the flexing of these fingers caused by the striking hammers.
摘要:
An electrical connection board containing a number of planes of conducting elements, with each pair of planes attached to the two faces of an insulating plate, arranged so that the conducting elements of one plane do not overlap those of other planes, with regularly spaced rows and columns of metallized connecting holes interposed therethrough. The conducting elements are capable of transmitting high-frequency pulses exhibiting steep edges without undesirable cross-talk phenomena resulting.
摘要:
A device for driving a flexible strip provided with two rows of regularly spaced lateral perforations. This device includes a first slider to which is imparted a first reciprocating movement back and forth parallel to the direction of said strip, a second slider which moves with the first slider as far as the first reciprocating movement is concerned, but to which is also imparted a second reciprocating movement with respect to the first slider, a hinging plate mounted to pivot on the first slider and carrying claws each of which may cooperate with a perforation in one of the said lateral rows, and means enabling the said hinging plate to be moved towards or away from the second slider.
摘要:
A device for controlling at least one magnetic head in an apparatus for writing and reading data on and out a magnetic medium. Said device is equipped with a spindle actuating at least one cam cooperating with at least one arm equipped with a spring attached by one of its ends to this arm and by the other end in contact with the magnetic head in such a way as to be capable of bringing said magnetic head near said medium into a position for writing or reading said data, a device for controlling the rotation of said spindle, means for locking the magnetic head in said position and means for releasing the magnetic head, so that it may be moved away from said medium. Said device is utilizable with magnetic disk memories.
摘要:
The method, and apparatus therefor, for processing calls transmitted at random from calling devices, each call specifying a response delay before such call should be processed, wherein the calls are chained into a waiting queue as they are detected, and wherein the calls in the queue are processed according to their specified response delays.
摘要:
A closed loop system is provided in an impact printer wherein a variable delay circuit is introduced into the command input to a hammer of the printer. The introduced delay time between the command input for the hammer to strike and the time at which the hammer actually is released or actuated to travel during its flight time from its normal position into impacting relation with the printer anvil, is adjustable so that the time of impact may be corrected to coincide with a desired timing relation, i.e. the hammer may be ''''aligned.'''' All hammers of the printer are similarly aligned and in order to accommodate for the fact that the actual flight time of any hammer will vary from strike-tostrike, provision is made for determining the average of several actual flight times and for correcting the delay time in accord with this average.