| 摘要 |
1,040,831. Door checks; hinges. J. N. MORRIS and R. M. WILLIAMS. May 4, 1964 [Feb. 5, 1963], No. 4731/63. Addition to 863,785. Headings E2F and E2M. In a door checking device as described with reference to Figs. 1, 2 of the parent Specification the cylinder 11 is made from drawn or seam welded tube having a "commercial finish" as supplied, and does not have any serrations or other projections formed on its inner surface, the rotor 15 being roughened by sand blasting, knurling or other roughening process. Alternatively the rotor 15 may also have an ordinary "commercial finish". |
