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    • 6. 发明授权
    • Auger-type pilot bit
    • AUGER型导柱
    • US3557887A
    • 1971-01-26
    • US3557887D
    • 1967-09-19
    • WATSON MFG CO
    • WATSON JOHN V
    • E21B10/44E21B9/06
    • E21B10/44
    • Following is disclosed a drill bit especially adapted for use as a pilot bit in drilling foundation holes and which has a substantially conical body. Two blade portions, spaced 180* apart, extend from the body in spiral fashion from a common joining region adjacent the apex of the body. Each blade has a concave leading surface of small radius in transverse cross section and a trailing surface of larger radius than that of the body. The blades terminate beyond the apex of the body, being connected with a substantially horizontal line tangential with their cutting edges. Further, a connection means is disclosed having a depression in the base of the body, with a first region having in transverse cross section two opposite, parallel sides connected at each end with a curved surface substantially parallel with the exterior surface of the body. A second region extends from the first region toward the apex of the body and is substantially rectangular in transverse cross section with its end region facing the blades. A male connection member registers with said depressions and is secured therein by a fastener which extends through the bit body.
    • 8. 发明授权
    • File tray control plate system
    • 文件托盘控制板系统
    • US3718232A
    • 1973-02-27
    • US3718232D
    • 1971-04-06
    • WATSON MFG CO
    • MOORE GHORLACHER J
    • B42F17/08B42F17/12B65D57/00
    • B42F17/08B42F17/12
    • A drawer or tray is disclosed for filing and referencing cards or checks or other records. In order to make the cards or other records conveniently available for filing and viewing, the tray includes an adjustable control plate arrangement whereby an infinitely adjustable viewing space or working Vee may be created where desired in the stored cards. The control plate arrangement includes control plates slidably mounted on a longitudinal rod in the tray bottom which provides a position lock for each plate to adjustably hold the plate in a particular viewing position within the drawer.
    • 披露抽屉或托盘,用于提交和参考卡片或支票或其他记录。 为了使卡或其他记录方便地用于归档和查看,托盘包括可调节的控制板装置,由此可以在所存储的卡中根据需要创建无限可调的观看空间或工作Vee。 控制板装置包括可滑动地安装在托盘底部中的纵向杆上的控制板,其为每个板提供位置锁定,以可调节地将板保持在抽屉内的特定观察位置。