| 摘要 |
<p>807,482. Making gratings and electric components. MULLARD Ltd. Oct. 3, 1956, No. 30130/56. Class 83 (2). [Also in Group XXXIX] A jig for facilitating assembly of a magnetic memory matrix (see Group XXXIX) comprises a jig face 1 with recesses 2 and a removable cover-plate 4 of flexible metal foil having apertures 5 aligned with the recesses. In construction, a pattern of recesses is formed on the jig face which is then coated with resist material and used to impress a corresponding resit pattern on the cover-plate. An etching process is used to form the aperture 5. Specifications 777,676 and 800,468, [both in Group XXXIX], are referred to.</p> |
