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专利№222673中提出的这种卡尺除用于长度测量外,同时还能用于角度测量:如锥度和斜度。这种卡尺的特点是在测深尺上作有特殊刻度1(图1),还有带瞄准刻线的小型尺框。
In addition to its length measurement, the caliper proposed in patent No. 222673 can also be used for angle measurements such as taper and slope. This caliper features a special scale 1 on the depth scale (Figure 1) and a small frame with aiming scribing.