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    Improvements in or relating to Work Supports.
    5.
    发明专利
    Improvements in or relating to Work Supports. 未知

    公开(公告)号：GB190824684A

    公开(公告)日：1909-01-21

    申请号：GB190824684D

    申请日：1908-11-17

    Applicant: STEWART WILLIAM CULLEN

    Inventor： STEWART WILLIAM CULLEN

    Abstract: 24,684. Stewart, W. C. Nov. 20,1907, [date applied for under Section 91 of Patents &c. Act, 1907]. Nailing.-A work-support, particularly for use in connexion with loose-nailers, sluggers, and protector-drivers, is constructed so that its free end may be moved universally in a single plane, while normally it is held in such a position relatively to the machine head that the jacking &c. of the work is facilitated. The invention is described with reference to that type of support in which the jackpost 20 is carried by a bracket 3 secured to the vertically-movable jack spindle 2. The jack-post 20 is provided at its lower end with a gimbal joint, which is in two sections connected by a pivot-pin 23, while the upper section is secured to the jackpost by a pivot pin 22 at right angles to the first pin. The curved faces of the two sections limit the movements of the post. An adjustable spring 25 normally holds the jack-post in the position shown in full lines in Fig. 2. The lower end of the jackpost is mounted on a collar 8 secured to a pin 5, which passes freely through a collar 6 and a table 4 formed on the lower end of the bracket 3. The collars 6, 8 have complementary cam-surfaces 7, 9, which are held in contact with each other by a spring 10. To adjust the height of the jack-post and to lock it in its adjusted position, there is provided a handle 13 having a pair of depending hook-shaped lugs 14, Figs. 2 and 4, at its inner end. This handle is pivoted about a screw 12, which engages a lug 6 extending from the collar 6. The lugs 14 project past and overlie a bar 15 extending laterally from a pin 16, which is located in a recess in the collar 6. This bar is provided with a wedgefaced dog 18, which is held in engagement with ratchet teeth 4 on the periphery of the table 4 by a spring-pressed plug 19 mounted on the handle 13. If the handle is moved transversely in either direction, one of the lugs 14 engages the bar 15 and moves it so that the dog 18 is withdrawn from engagement with the ratchet teeth 4 ; further movement of the handle rotates the collar 6, and thereby raises or lowers the collar 8 and the jack-post.

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