-
公开(公告)号：US4449811A
公开(公告)日：1984-05-22
申请号：US355975
申请日：1982-03-08
CPC分类号： G03B27/6228 , G03B27/6257
摘要： Disclosed is a platen cover for a copying machine in which the bound volume copying platen is not used for sheet document copying. The cover includes a sheet document transport and handling mechanism with the cover having an independently liftable lid to provide access to the transport and handling mechanism. Substantially uniform counter-balancing of the cover, containing the transport and handling mechanism, or the lid alone, from the closed hold-down position to the raised stay-open position, is provided by a torsional helix spring positioned about the pivotal axis of the lid counterbalancing the lid, and a gas spring acting on the transport and handling mechanism through a lever arm about the same axis, counterbalancing the mechanism.
摘要翻译： 公开了一种用于复印机的压纸盖，其中装订卷纸复印台板不用于纸张文件复印。 该盖包括片材文件传送和处理机构，其中盖具有独立可提升的盖，以提供对运输和处理机构的通路。 包含运输和处理机构的盖子或单独的盖子从封闭的压下位置到凸起的打开位置的大体平衡的反平衡是通过扭转螺旋弹簧来提供的， 盖子平衡盖子，气体弹簧通过杠杆臂围绕同一轴线作用在输送和处理机构上，平衡机构。
-
公开(公告)号：US4376933A
公开(公告)日：1983-03-15
申请号：US152969
申请日：1980-05-23
CPC分类号： H03M7/42
摘要： A circuit for compacting variable length data words into a fixed word length format is disclosed. Each variable length data word and its associated leading 0's are separated by a delimiter bit and stored in memory. When the memory is accessed, the output word is loaded in parallel into a first shift register and shifted to strip the leading 0's and delimiter bit. The remaining data bits are then shifted serially into a second shift register. When the second shift register is full, the resultant fixed length data word is latched out. When the first shift register is empty, the next word is loaded in from memory. In this way, a series of variable length words may be compacted into a series of fixed length words. This circuit is useful for compacting variable length Huffman codes since the boundaries between codes are self evident. This circuit can also be used as a character generator, where the variable length data output comprises the bits required to generate a character image on a raster scanned display.
摘要翻译： 公开了一种用于将可变长度数据字压缩为固定字长格式的电路。 每个可变长度数据字及其相关联的前导0由分隔符位分隔并存储在存储器中。 当存储器被访问时，输出字被并行加载到第一个移位寄存器中，并移位以去除前导0和定界符位。 然后将剩余的数据位串行地移位到第二移位寄存器中。 当第二移位寄存器满时，所得到的固定长度数据字被锁存。 当第一个移位寄存器为空时，下一个字从存储器加载。 以这种方式，一系列可变长度字可以被压缩成一系列固定长度的字。 该电路对于压缩可变长度霍夫曼码是有用的，因为码之间的界限是不言而喻的。 该电路也可以用作字符发生器，其中可变长度数据输出包括在光栅扫描显示器上生成字符图像所需的位。
-
搜索结果
2 条记录 (耗时 0.02 秒)
