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    • 3. 发明授权
    • Framing T-square and protractor
    • 框架T形和量角器
    • US4736524A
    • 1988-04-12
    • US15450
    • 1987-02-17
    • Calvin E. King
    • Calvin E. King
    • G01B3/56G01C9/28G06G1/00G01C9/12
    • G01B3/56G01C9/28G06G1/0021
    • There is disclosed a framing T-Square and protractor wherein the head of the T-Square and the elongated rule thereof are connected by means of a ballbearing allowing the rule portion to be free-swinging with respect to the head, which is in the form of a rectangular plate having a protractor scale thereon marked in degrees and auxiliary scales marked with inches of rise per 12 inches of run for common rafters and for hip and valley rafters. A rectangular panel is hingedly attached to the plate on a hinged line normally at right angles to the elongated rule; a friction locking mechanism permits the rule to be locked at any desired angle relative to the plate and panel. The rule, plate, and panel are marked on the back with rafter tables and other data including run lengths and protractor angle settings useful in roof framing and other construction or carpentry work. A vernier scale on the front of the panel facilitates setting of angle measurements to an accuracy of one-tenth of a degree.
    • 公开了一种框架T方形和量角器,其中T型方形头部及其细长规则通过球轴连接,允许规则部分相对于头部自由摆动,头部形式 一个矩形板,其上有一个刻度尺上的量角器刻度,辅助刻度标有12英寸英寸,普通椽子和臀部和谷椽子的上升。 矩形面板通常以与细长规则成直角的铰接线铰接地附接到板上; 摩擦锁定机构允许规则相对于板和面板被锁定在任何期望的角度。 规格,板材和面板在背面标有椽子桌子和其他数据,包括运行长度和量角器角度设置,可用于屋顶框架和其他建筑或木工作业。 面板前面的游标刻度有助于将角度测量值设置为十分之一度的精度。
    • 7. 发明授权
    • Stairway calculator
    • 楼梯计算器
    • US5310995A
    • 1994-05-10
    • US935879
    • 1992-08-26
    • Nelson OuelletRobert Caouette
    • Nelson OuelletRobert Caouette
    • G06G1/00G06G1/06G06G1/02B43L7/10
    • G06G1/0021G06G1/06
    • A slide rule comprises, to calculate the parameters of a stairway to be installed between lower and upper floor surfaces, (a) a first scale on a stationary body denoting the number of risers, (b) a second scale on a first slide denoting the elevation of the upper floor surface above the lower one and associated with a first arrow on the body, (c) a third scale on the body denoting tread depths and associated with a mark on the first slide, (d) a fourth scale on a second slide denoting the horizontal spread of the stairway and associated with a second arrow on the body, (e) a fifth scale on the body denoting the number of treads, and (f) a sixth scale on the second slide denoting the length of the stairwell and associated with a third arrow on the first slide. The first arrow indicates on the second scale the height of the risers when the number of risers on the first scale is aligned with the elevation of the upper floor surface on the second scale. The mark then indicates on the third scale a suggested range of tread depths. By indicating with the second arrow the depth of the treads on the fourth scale, the slide rule aligns the number of treads on the fifth scale with the horizontal spread of the stairway on the fourth scale. Finally, the third arrow indicates on the sixth scale the length of the stairwell.
    • 滑动规则包括:计算要安装在下层和上层之间的楼梯的参数,(a)表示立管数量的固定体上的第一刻度,(b)第一片上的第二刻度, (c)身体上的第三刻度,其表示胎面深度并与第一载玻片上的标记相关联,(d)在第一标尺上的第三刻度, 第二张幻灯片表示楼梯的水平扩展并与身体上的第二个箭头相关联,(e)表示踏板数量的身体上的第五个刻度,(f)第二个幻灯片上的第六个刻度,表示第二个幻灯片的长度 楼梯间并与第一个幻灯片上的第三个箭头相关联。 第一个箭头表示当第一刻度上的立管的数量与第二刻度上的上层表面的高度对齐时,第二刻度上的立管的高度。 然后,标记在第三个刻度上表示一个建议的胎面深度范围。 通过用第二箭头指示第四刻度上的踏板的深度,滑动规则将第五刻度上的踏面数与第四刻度上的楼梯的水平扩展对齐。 最后,第三个箭头表示楼梯间隔的第六个长度。