Apparatus for and method of testing visual acuity
    1.
    发明授权
    Apparatus for and method of testing visual acuity 失效
    视力检测仪器及测试方法

    公开(公告)号:US4838684A

    公开(公告)日:1989-06-13

    申请号:US12506

    申请日:1987-02-09

    申请人: Jeffery W. Smith

    发明人: Jeffery W. Smith

    摘要: A hand-held, rotatable, cylindrical drum provided with a series of sequentially interchangeable stimulus patterns that cover the drum which, when rotated in front of a patient, induces optokinetic nystagmus which is used to non-verbally assess the visual acuity of a patient.

    摘要翻译: 一种手持式可旋转的圆筒形鼓,其具有覆盖鼓的一系列可顺序地可互换的刺激图案,该鼓在当前在患者面前旋转时引起视动眼震,其用于非口头评估患者的视力。

    Mats for use in paved surfaces
    2.
    发明授权
    Mats for use in paved surfaces 失效
    用于铺面的垫子

    公开(公告)号:US08043025B2

    公开(公告)日:2011-10-25

    申请号:US11789203

    申请日:2007-04-24

    IPC分类号: E01C3/00

    摘要: A paving mat for use in a paved surface includes a fibrous mat in the form of a paving mat. The fibrous mat includes a fibrous matrix containing a mixture of polymer fibers, first mineral fibers having a first median length, and second mineral fibers having a second median length that is different from the first median length. In another embodiment, the paving mat includes a fibrous mat including a fibrous matrix which is bonded together by a binder. In one embodiment, the binder is a mixture of different binders. The fibrous matrix includes a mixture of mineral fibers in an amount within a range of from 61 wt % to 85 wt % and polymer fibers in an amount within a range of from 15 wt % to 39 wt %. The polymer fibers have a melting point greater than 320° F. (160° C.). The mat has a stiffness in the machine direction within a range of from 65 g-cm to 110 g-cm. The mat has a load-elongation behavior such that when the mat is subject to tensile stress, the mat achieves at least 90% of its ultimate load at an elongation not greater than 5% of the specimen length in the direction of applied stress. Another embodiment of the paving mat is made with a carboxy-modified acrylic binder.

    摘要翻译: 用于铺设表面的铺路垫包括铺路垫形式的纤维垫。 纤维垫包括含有聚合物纤维,具有第一中值长度的第一矿物纤维和具有不同于第一中值长度的第二中值长度的第二矿物纤维的混合物的纤维基质。 在另一个实施例中,铺路垫包括纤维垫,其包括通过粘合剂粘合在一起的纤维基质。 在一个实施方案中,粘合剂是不同粘合剂的混合物。 该纤维基质包括范围为61重量%至85重量%范围内的矿物纤维的混合物和15重量%至39重量%范围内的量的聚合物纤维。 聚合物纤维的熔点大于320°F(160℃)。 垫子在机器方向上的刚度在65g-cm到110g-cm的范围内。 垫具有负载伸长性能,使得当垫受到拉伸应力时,该垫在不大于施加应力方向上的试样长度的5%的伸长率下达到其极限载荷的至少90%。 铺路垫的另一实施例由羧基改性的丙烯酸粘合剂制成。