Multimode fiber optic coupler and method for making
    1.
    发明授权
    Multimode fiber optic coupler and method for making 失效
    多模光纤耦合器及其制造方法

    公开(公告)号:US4772085A

    公开(公告)日:1988-09-20

    申请号:US923985

    申请日:1986-10-28

    摘要: A multimode fiber optic coupler includes a first multimode optical fiber having a core and cladding surrounding the core and having a first longitudinal segment in which the cladding has been substantially removed exposing the core and in which a portion of the exposed core forms a first biconical taper segment; a second multimode optical fiber having a core and a cladding surrounding the core and having a second longitudinal segment in which the cladding has been substantially removed exposing the core and in which a portion of the exposed core forms a second biconical taper segment; and a coupling region formed by portions of the first and second biconical taper segments being fused together in parallel juxtaposition with one another.

    摘要翻译: 多模光纤耦合器包括第一多模光纤,其具有围绕芯的芯和包层,并且具有第一纵向段,其中已经基本上去除了包层,露出芯,并且其中一部分暴露的芯形成第一双锥形 分割; 第二多模光纤,其具有芯和围绕所述芯的包层,并且具有第二纵向段,其中所述包层基本上被去除,暴露所述芯并且其中所述暴露的芯的一部分形成第二双锥形锥段; 并且由第一和第二双锥形锥形段的部分形成的联接区域彼此并联并置在一起。

    Tone generating system for electronic musical instrument
    2.
    发明授权
    Tone generating system for electronic musical instrument 失效
    电子乐器音调发生系统

    公开(公告)号:US4186637A

    公开(公告)日:1980-02-05

    申请号:US835832

    申请日:1977-09-22

    摘要: This invention relates to tone generating systems for polyphonic electronic musical instruments. The system includes a plurality of programmable tone generators each of which is assigned to a different note to be sounded. For a preferred embodiment, one of the programmable tone generators is designated as a solo high tone generator, and is always utilized to produce the highest note to be sounded. Another generator may be designated as the solo low generator, and will always be utilized to generate the lowest note to be sounded. Additional solo note generators may be provided if desired. Tone generators are interconnected in a priority scheme with one generator at a time being designated as the next generator to be assigned a note to be sounded, and the designation being advanced in a predetermined manner as notes are assigned successively to the generators. One or more keyers are associated with each programmable tone generator, and receive a keyer enable signal from the tone generator when a note to be sounded is stored therein. Each generator also generates one or more pulse code outputs to its corresponding keyers, programming them to adapt to the selection of musical notes over a multi-octave range. Phase cancellation between two notes which are octavely related is avoided by duplicate generation of one of the notes in both master and slave tone generators, the code for any note being stored in both the master and slave generators whenever it is determined that the code for an octavely related note is already stored in another master generator. Various special effects are achieved by selectively dropping pulses from the clock signal applied to the programmable divider of the generator.

    摘要翻译: 本发明涉及复音电子乐器的乐音发生系统。 该系统包括多个可编程音调发生器,每个音调发生器被分配给要发出的不同音符。 对于优选实施例,可编程乐音发生器中的一个被指定为独奏高音发生器,并且总是用于产生要被发音的最高音符。 另一个发生器可以被指定为独奏低发生器,并且将始终被用于产生要被发音的最低音符。 如果需要,可以提供附加的独奏音符发生器。 音调发生器以优先方案与一个发电机相互连接,一次被指定为下一个发电机,以分配要发出的音符,并且当音符连续分配给发电机时,该指定以预定的方式前进。 一个或多个键控器与每个可编程音调发生器相关联,并且当存在要发出的音符时,从音调发生器接收到键控器使能信号。 每个发生器还产生一个或多个脉冲代码输出到其对应的键控器,对它们进行编程以适应多音程范围内的音符选择。 通过在主和从属音发生器中重复生成音符之一来避免与八度相关的两个音符之间的相位消除,任何音符的代码存储在主发生器和从属发生器中,无论何时确定 八度相关音符已经存储在另一个主发生器中。 通过从施加到发生器的可编程分压器的时钟信号中选择性地丢弃脉冲来实现各种特殊效果。

    Polyols useful for preparing polyurethane foams having improved
retention of insulative properties, polyurethane foams prepared
therewith and methods for the preparation thereof
    3.
    发明授权
    Polyols useful for preparing polyurethane foams having improved retention of insulative properties, polyurethane foams prepared therewith and methods for the preparation thereof 失效
    可用于制备具有改善的绝缘性能保持性的聚氨酯泡沫的多元醇,其制备的聚氨酯泡沫及其制备方法

    公开(公告)号:US5332860A

    公开(公告)日:1994-07-26

    申请号:US85331

    申请日:1993-06-29

    摘要: Polyurethane foams having improved retention of insulative properties can be prepared using one or more of two novel polyols. One of the polyols is a polyether prepared by reacting a monoepoxide with a compound having the general formula: ##STR1## wherein X is H, Li, Na, K; A is N, S or O; L is a covalent bond or a connecting group having from 1 to 10 carbons; M is any group capable of reacting with an ethylene oxide molecule in the presence of a basic catalyst; and J is an integer from 2 to 8. The other polyol is prepared by (1) admixing ethylene carbonate and one or more hydroxyl functional compounds under reaction conditions sufficient to react the ethylene carbonate and the hydroxyl functional compounds to produce a polyol precursor, and (2) admixing the polyol precursor with diethylene glycol and an anhydride, a dicarboxylic acid, a tricarboxylic acid or mixtures thereof, optionally in the presence of a catalyst.

    摘要翻译: 具有改善的绝缘性能保持性的聚氨酯泡沫可以使用两种新型多元醇中的一种或多种制备。 多元醇之一是通过单环氧化物与具有以下通式的化合物反应制备的聚醚:其中X为H,Li,Na,K; A是N,S或O; L是共价键或具有1至10个碳的连接基团; M是能够在碱性催化剂存在下与环氧乙烷分子反应的任何基团; 并且J为2至8的整数。另外的多元醇通过(1)在足以使碳酸亚乙酯和羟基官能化合物反应以产生多元醇前体的反应条件下混合碳酸亚乙酯和一种或多种羟基官能化合物来制备,以及 (2)任选地在催化剂存在下,将多元醇前体与二甘醇和酸酐,二羧酸,三羧酸或其混合物混合。

    Poly(1-oxy-3-lactam vinylene)
    4.
    发明授权
    Poly(1-oxy-3-lactam vinylene) 失效
    聚(1-氧-3-内酰胺亚乙烯基)

    公开(公告)号:US4644050A

    公开(公告)日:1987-02-17

    申请号:US775768

    申请日:1985-09-13

    摘要: Poly(1-oxy-3-lactam vinylenes) of the formula ##STR1## wherein n is 1, 2, or 3 are disclosed formed by the polymerization of 1-(2-chloroacetyl)lactams having 5, 6, or 7 carbon atoms in the lactam ring. The polymers are useful reactants in polyester and polyurethane formation.

    摘要翻译: 公开了通过聚合具有5,6或7个碳原子的1-(2-氯乙酰基)内酰胺形成的通式为其中n为1,2或3的式(Ⅰ-3)的聚(1-氧-3-内酰胺亚乙烯基) 在内酰胺环。 聚合物是聚酯和聚氨酯形成中有用的反应物。

    Method and apparatus for selectively enclosing a length of pipe
    7.
    发明授权
    Method and apparatus for selectively enclosing a length of pipe 失效
    用于选择性地封闭一段管道的方法和装置

    公开(公告)号:US5078171A

    公开(公告)日:1992-01-07

    申请号:US486957

    申请日:1990-03-01

    IPC分类号: F16L57/00

    摘要: An enclosure for selectively cooperating with embedded securing bars prevents unauthorized access to above ground portions or underground piping networks. The enclosure employs a pivot channel and a retainer channel separated by a distance substantially equal to the distance separating the securing bars. The pivot channel and the retainer channel are configured so as to require rotational and horizontal motion of the enclosure so as to operatively disposed the enclosure relative to the securing bars. The locking member of the enclosure is used to secure a securing bar within the retainer channel so as to prevent rotation of the enclosure relative to either securing bar.

    摘要翻译: 用于选择性地与嵌入式固定杆配合的外壳防止未经授权的进入地面部分或地下管道网络。 外壳采用一个枢转通道和一个保持通道,该通道与保持杆分开的距离基本相等。 枢转通道和保持器通道被构造成需要外壳的旋转和水平运动,以便相对于固定杆可操作地设置外壳。 外壳的锁定构件用于将固定杆固定在保持器通道内,以防止外壳相对于任一固定杆旋转。

    Long duration aperiodic musical waveform generator
    8.
    发明授权
    Long duration aperiodic musical waveform generator 失效
    长时间非周期性的音乐波形发生器

    公开(公告)号:US4442745A

    公开(公告)日:1984-04-17

    申请号:US144286

    申请日:1980-04-28

    IPC分类号: G10H7/02 G10H1/00

    CPC分类号: G10H7/02

    摘要: This is an electronic organ which economically simulates long duration aperiodic musical waveforms, such as the clash of cymbals. It employs the digital waveform generation technique, in which successive instructions are read out of a memory to determine the amplitude of the waveform at successive sample points. To save memory capacity, the memory addresses are rescanned; and to avoid audible discontinuities the scan direction recirculates numerically back and forth across the address field. Despite the bidirectionality of the scan, monotonic decreases in amplitude and in higher harmonic content are achieved. The monotonic decrease in amplitude is accomplished by impressing an exponentially declining envelope upon the digitally generated amplitudes. The monotonic decrease in higher harmonic content is accomplished by preventing the rescan from returning to a memory region of greater harmonic content after it has once entered a region of lesser harmonic content.

    摘要翻译: 这是一个经济上模拟长时间不平衡的音乐波形的电子琴,如钹的冲突。 它采用数字波形生成技术,其中从存储器读出连续指令以确定连续采样点处波形的幅度。 为了节省内存容量,重新扫描内存地址; 并且为了避免可听见的不连续性,扫描方向在地址字段上来回地进行数字循环。 尽管扫描的双向性,实现了幅度和谐波含量的单调降低。 振幅的单调下降是通过在数字产生的振幅上施加指数衰减的包络来实现的。 高次谐波含量的单调降低是通过在一旦进入较少谐波含量的区域之后防止重新扫描返回到具有较高谐波含量的存储区域来实现的。

    Broadband MXN optical fiber couplers and method of making
    10.
    发明授权
    Broadband MXN optical fiber couplers and method of making 失效
    宽带MXN光纤耦合器及其制作方法

    公开(公告)号:US5355426A

    公开(公告)日:1994-10-11

    申请号:US939011

    申请日:1992-09-02

    IPC分类号: G02B6/28 G02B6/26 C03B23/20

    CPC分类号: G02B6/2856

    摘要: A broadband optical fiber coupler comprising at least three continuous optical fibers fused at a region of coupling, at least one of the continuous optical fibers being dissimilar to others of the continuous optical fibers in the region of coupling, the region of coupling being of a length and the dissimilarity being of a degree to provide broadband response over a predetermined range of wavelengths. A related method for making a broadband optical fiber coupler is also disclosed.

    摘要翻译: 一种宽带光纤耦合器,包括在耦合区域中融合的至少三个连续光纤,所述连续光纤中的至少一个在耦合区域中与所述连续光纤中的其它光纤不相似,所述耦合区域的长度 并且不相似度在一定程度上在预定波长范围内提供宽带响应。 还公开了制造宽带光纤耦合器的相关方法。