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公开(公告)号：US3779359A
公开(公告)日：1973-12-18
申请号：US3779359D
申请日：1971-10-22
Applicant: IBM
Inventor： MORRISON D , RAESZ R
CPC classification number: B41J19/70
Abstract: A system for performing a carrier return operation in a typewriter, printer, etc., having a leadscrew controlled carrier, and controlling when the carrier is to be returned dependent upon a carrier return signal generated in conjunction with combinations of generated signals indicative of rotation and nonrotation of the leadscrew, and the leadscrew rotational position. The system is structured such that the carrier will be returned and properly positioned at the left margin or starting line upon termination of escapement, and upon signals being generated indicating that the leadscrew is in its home rotational position.
Abstract translation: 一种用于在具有丝杠控制载体的打字机，打印机等中执行载体返回操作的系统，以及控制什么时候返回载体，取决于结合生成的指示旋转的信号的组合和 丝杠不旋转，丝杠旋转位置。 该系统被构造成使得在擒纵机构终止时，以及当产生的信号指示丝杠处于其原始旋转位置时，载体将返回并适当地定位在左边距或起始线处。
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公开(公告)号：BR7201900D0
公开(公告)日：1973-09-20
申请号：BR190072
申请日：1972-03-29
Applicant: IBM
Inventor： MORRISON D , RAESZ R
Abstract: A system for performing a carrier return operation in a typewriter, printer, etc., having a leadscrew controlled carrier, and controlling when the carrier is to be returned dependent upon a carrier return signal generated in conjunction with combinations of generated signals indicative of rotation and non-rotation of the leadscrew, and the leadscrew rotational position. The system is structured such that the carrier will be returned and properly positioned at the left margin or starting line upon termination of escapement, and upon signals being generated indicating that the leadscrew is in its home rotational position.
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公开(公告)号：SE365054B
公开(公告)日：1974-03-11
申请号：SE36469
申请日：1969-01-13
Applicant: IBM
Inventor： MORRISON D , TANNER H
Abstract: 1,210,586. Magnetic card apparatus. INTERNATIONAL BUSINESS MACHINES CORP. 3 Jan., 1969 [15 Jan., 1968], No. 57758/68. Heading G4M. The apparatus is similar to that disclosed in Specification 1,210,587 but is mainly concerned with the recording and playback of a reference character at the beginning of each track. Initially the card is driven at high speed in the reverse direction (23) until photo-cell 19 is covered, track return latch 67 is set followed by D1 which resets 67 and initiates forward drive (24). If a reference character has been previously recorded on the track selected, it is gated at 75 with D1 and 19 outputs and counter 77 gives an output when all bits of the reference character have been read, to reset D1 and set D2 or D6 depending on whether record or playback mode has been selected. In the record mode the card is driven in reverse and the reference character bits are applied to time out circuit 87 which causes an output from 89 when the reference character is correctly positioned between the read and write heads, D2 being reset and D3 set. If the reference character was found to be in error or missing completely, D4 may be set to initiate recording of a reference character, the card being driven in reverse at high speed until photo-cell 19 and gate 107 reset D4 and set D5, the latter initiating forward movement of the card and gating the reference character from a register 108. Bit counter 77 indicates when all the bits have been recorded to reset D5 and set D3 via gate 115. With a correctly recorded reference character, operation to record data characters is as described in Specification 1,210,587. If the playback mode has been selected, operation is as described above for the D1 cycle and D6 is reset when a data character has been read. If a change to record mode is required before the data characters are read, D2 is set by gate 117 to reposition the reference character between the read and record heads. Similarly if a change from record to playback mode is required before the first data character is recorded, gate 119 sets D1 and resets D3, D1 being reset and D6 set when the reference character has passed the read head. If a reference character is not sensed during the playback mode, the operator can proceed to read subsequent data characters or can choose to record a reference character by changing to the record mode (gate 103 sets 67 followed by D1
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