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    Control for chain printer
    1.
    发明授权
    Control for chain printer 失效
    链条打印机控制

    公开(公告)号：US3699884A

    公开(公告)日：1972-10-24

    申请号：US3699884D

    申请日：1971-05-26

    Applicant: MOHAWK DATA SCIENCES CORP

    Inventor： MARSH LYNN W JR ,  SCHNEIDERHAN EDWARD M

    IPC: G06K15/08

    CPC classification number: G06K15/08

    Abstract: A control system for a horizontal type carrier, or ''''chain'''', printer wherein a recirculating shift register memory is employed to store the code representations of characters to be printed on the print line. A tracking or address counter is advanced in synchronism with the movement of data through the shift register and serves to identify each character stored therein with the particular print position in which it is to be printed. Generation of print command signals is accomplished by comparing, in sequence, each character stored in the memory with the output of a character generation counter which is advanced in synchronism with the movement of the type carrier to identify the order in which the types on the carrier move past the print positions. Actuation of the comparator and advancement of the character generation counter are controlled directly by the output of the tracking counter. Beginning-of-font sync pulses are generated by gating a primary index signal derived directly from the type carrier with a secondary index signal derived from a rotating code disc. A plurality of index marks are provided on the code disc in a manner to enable generation of properly timed beginning-of-font signals for any of a variety of different font length type carriers interchangeably employable in the printer.

    Abstract translation: 一种用于水平式载体或“链”式打印机的控制系统，其中使用循环移位寄存器存储器来存储要打印在打印行上的字符的代码表示。 跟踪或地址计数器与数据通过移位寄存器的移动同步地进行，并用于识别存储在其中的每个字符与要打印的特定打印位置。 通过将存储在存储器中的每个字符与字符产生计数器的输出进行比较来实现打印命令信号的产生，该字符产生计数器与类型载体的移动同步地前进，以识别载体上的类型的顺序 移动印刷位置。 比较器的启动和字符发生计数器的提升由跟踪计数器的输出直接控制。 通过从具有从旋转代码盘导出的辅助索引信号来选择直接从类型载体导出的主索引信号来产生字体开始的同步脉冲。 在代码盘上提供多个索引标记，以便能够为在打印机中可互换使用的各种不同的字体长度类型的载体中的任一种产生适当定时的字体开始信号。

    Single-shot device
    3.
    发明授权
    Single-shot device 失效
    单镜头设备

    公开(公告)号：US3601636A

    公开(公告)日：1971-08-24

    申请号：US3601636D

    申请日：1969-06-23

    Applicant: MOHAWK DATA SCIENCES CORP

    Inventor： MARSH LYNN W JR

    IPC: H03K3/033 ,  H03K3/284 ,  H03K19/36

    CPC classification number: H03K3/033

    Abstract: A single-shot device having two NAND gates which are interconnected to provide an output signal in response to an input signal. The output signal remains for a predetermined duration until the output signal of one NAND gate is applied through a delay to the other NAND gate. The delay comprises a transient network which performs an integrating function and contains a series connected resistor and a parallel connected capacitor.

    Printer control system
    4.
    发明授权
    Printer control system 失效
    打印机控制系统

    公开(公告)号：US3582897A

    公开(公告)日：1971-06-01

    申请号：US3582897D

    申请日：1967-10-16

    Applicant: MOHAWK DATA SCIENCES CORP

    Inventor： MARSH LYNN W JR

    IPC: G06K15/00 ,  G06K15/08 ,  G06F3/12

    CPC classification number: G06K15/08 ,  G06K15/00

    Abstract: A telecommunications line-printer employs a segmented line print control and data buffering system wherein the serially received data and format control characters are temporarily stored in data groups corresponding to segments of a print line. Each group is scanned during printout operations until all data in the group have been printed. A switching matrix connects hammer driver circuits only to hammers in the line segment being printed, thus conserving hardware by time-sharing the drivers. Each data group has a control character defining format control operations, which operations are executed before printing of the group begins. In ordinary circumstances, each format control character occurring at the input opens a new data group to receive the next data characters, regardless of whether the previous group was completely filled. However, in ''''short line'''' situations memory is conserved by not closing the group until it is full and the rate of extraction of data from the memory is increased by temporarily suspending the performance of format operations. This preserves real time printing while insuring against loss of input data. In short-line situations, received format control characters are ignored by the format control means and instead trigger the printing of a special character indicating that a format operation was deleted.

    Front printer
    5.
    发明授权
    Front printer 失效
    正面打印机

    公开(公告)号：US3611922A

    公开(公告)日：1971-10-12

    申请号：US3611922D

    申请日：1969-08-28

    Applicant: MOHAWK DATA SCIENCES CORP

    Inventor： CARROLL FREDERICK E ,  EDWARDS JAMES H ,  MARSH LYNN W JR

    IPC: B41J1/20 ,  G06K15/08 ,  B41J

    CPC classification number: G06K15/08 ,  B41J1/20

    Abstract: A printer in which selectively activated hammers drive selected print slugs against a document by striking interposers which are maintained in contact and associated with the selected slugs and which transmit the force of the hammers to the slugs. Each slug is associated with a particular interposer and both are mounted in a continuous chain which moves across the document at the print line and is located on the same side of the document as are the hammers. The interposers are resiliently mounted in the chain and the slugs are biased away from the document and maintained in contact with the interposers. Preferably, each slug is partially located in an open-ended bore within its associated interposer and has a flanged end on which a type character is located projecting out of the bore. The slug''s flange is maintained in contact with the open end of the interposer and the centroids of the slug and interposer are aligned perpendicular to the document and along the center of the bore. Thus, an impact force on the interposer is transmitted to the flange of the slug to drive the slug toward, and perpendicular to the document.

    Print hammer control system
    6.
    发明授权
    Print hammer control system 失效
    打印锤子控制系统

    公开(公告)号：US3586983A

    公开(公告)日：1971-06-22

    申请号：US3586983D

    申请日：1968-11-25

    Applicant: MOHAWK DATA SCIENCES CORP

    Inventor： MARSH LYNN W JR

    IPC: B41J9/44 ,  H03K17/02

    CPC classification number: B41J9/44

    Abstract: A print hammer firing circuit incorporating secondary storage includes a Schmitt trigger, two logical AND circuits and a logical OR circuit. One of the AND circuits and the OR circuit are mutually interconnected input-to-output to provide the storage function and to drive the Schmitt trigger. The second AND circuit is connected to gate the trigger output under control of the storage circuit. An integrating network at the trigger input causes the gated output, which drives the hammer coil, to define an accurate hammer actuation time interval.

    Printer having fewer hammer actuating means than hammers
    8.
    发明授权
    Printer having fewer hammer actuating means than hammers 失效
    打印机具有更好的锤子激励手段

    公开(公告)号：US3654857A

    公开(公告)日：1972-04-11

    申请号：US3654857D

    申请日：1969-06-16

    Applicant: MOHAWK DATA SCIENCES CORP

    Inventor： MARSH LYNN W JR

    IPC: G06K15/08 ,  H04L17/16 ,  B41J9/10

    CPC classification number: G06K15/08 ,  H04L17/16

    Abstract: A telecommunications line-printer employs a segmented line print control and data buffering system wherein the serially received data and format control characters are temporarily stored in data groups corresponding to segments of a print line. Each group is scanned during printout operations until all data in the group have been printed. A switching matrix connects hammer driver circuits only to hammers in the line segment being printed, thus conserving hardware by time-sharing the drivers. Each data group has a control character defining format control operations, which operations are executed before printing of the group begins. In ordinary circumstances, each format control character occurring at the input opens a new data group to receive the next data characters, regardless of whether the previous group was completely filled. However, in ''''short line'''' situations memory is conserved by not closing the group until it is full and the rate of extraction of data from the memory is increased by temporarily suspending the performance of format operations. This preserves real time printing while insuring against loss of input data. In short line situations, received format control characters are ignored by the format control means and instead trigger the printing of a special character indicating that a format operation was deleted.

    Abstract translation: 电信线路打印机采用分段行打印控制和数据缓冲系统，其中串行接收的数据和格式控制字符被临时存储在对应于打印行的段的数据组中。 在打印操作期间扫描每组，直到组中的所有数据都已打印完毕。 开关矩阵将锤式驱动器电路仅连接到正在打印的线段中的锤，从而通过分配驱动器来节省硬件。 每个数据组具有定义格式控制操作的控制字符，在打印组开始之前执行哪些操作。 在通常情况下，在输入中出现的每个格式控制字符打开一个新的数据组以接收下一个数据字符，而不管先前的组是否被完全填充。 然而，在“短线”情况下，通过暂时停止格式化操作的性能，通过在组合完成之前不关闭组来保存存储器，并且通过临时中止执行格式操作来提高数据从存储器提取的速率。 这保留实时打印，同时确保输入数据丢失。 在短线情况下，接收的格式控制字符被格式控制装置忽略，而是触发表示格式化操作被删除的特殊字符的打印。

    Control for chain printer
    9.
    发明授权
    Control for chain printer 失效
    链条打印机控制

    公开(公告)号：US3629861A

    公开(公告)日：1971-12-21

    申请号：US3629861D

    申请日：1969-11-17

    Applicant: MOHAWK DATA SCIENCES CORP

    Inventor： MARSH LYNN W JR ,  SCHNEIDERHAN EDWARD M

    IPC: B41J7/36 ,  G06K15/08

    CPC classification number: G06K15/08

    Abstract: A control system for a horizontal-type carrier, or ''''chain,'''' printer wherein a recirculating shift register memory is employed to store the code representations of characters to be printed on the printline. A tracking or address counter is advanced in synchronism with the movement of data through the shift register and serves to identify each character stored therein with the particular print position in which it is to be printed. Generation of print command signals is accomplished by comparing, in sequence, each character stored in the memory with the output of a character generation counter which is advanced in synchronism with the movement of the type carrier to identify the order in which the types on the carrier move past the print positions. Actuation of the comparator and advancement of the character generation counter are controlled directly by the output of the tracking counter. Beginning-of-font sync pulses are generated by gating a primary index signal derived directly from the type carrier with a secondary index signal derived from a rotating code disc. A plurality of index marks are provided on the code disc in a manner to enable generation of properly timed beginning-of-font signals for any of a variety of different font length type carriers interchangeably employable in the printer.

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