Patent GB-190918285-A (GB)
Title: Improvements relating to Typewriters.
Inventor: OLIVETTI CAMILLO
IPC: B41J7/02
Filed: 1908-08-08
Granted: 1910-08-04
Abstract: 18,285. Olivetti, C. Aug. 8, 1908, [Convention date]. Type-lever actions.-The typelever 15 is actuated by a connecting-rod 13 from a crank 11 on a shaft 9 which is connected to a shaft 4 carrying the keystem 2, the shafts 4, 9 being parallel to the plane of the type-lever, and the crank 11 when at mid-position being at right-angles to the connecting- rod 13, so that this diverges only slightly from its own plane and the plane of the typelever. The above-stated relations of the parts are preserved for all the units of the action, so that the outer keys and type-levers work under the same conditions as the middle keys and type-levers. The type-lever is pivoted at 16 and is loosely pivoted at 14 to the rod 13, which is loosely pivoted at 12 to the crank 11. The rod 13 pushes the type-lever to the impression point, but may be arranged to pull, in which case the connexion 14 is placed below the pivot 16. To lighten the " touch" of the machine, one of the cranks 3, 6, 8 or 11 may be replaced by a spring consisting of a wire which is twisted round the shaft 4 or 9 and secured by a collar. The type-lever is provided with a spring 18, which is attached to the frame at 20 and to the type-lever at 19, the end 20 being placed in the known manner in the angle included between the lines 16, 19 in the upper and the lower positions of the type-lever, so that the spring acts both to raise and to return the type-lever. The end 20 is preferably placed close to the lines 16, 19 when the type-lever is in the lower position, the spring thus acting to assist slightly in the raising of the typa-bar lever but acting strongly to return the type-lever. The end 20 is attached to a book which may be adjusted in a slot in the frame. The type-levers rest on a cushion filled with sand or other non-elastic substance and fitted to a metal band 24, which is not secured to the frame but merely rests on brackets 26, and is prevented from being displaced by means of studs 27 which enter large slots in the band. In the complete action, the parallel shafts 4 are arranged in four parallel planes and the parallel shafts 9 are arranged on the generating-lines of two cylinders having the axis passing through the printing point. The pivots 16 of the type-levers are perpendicular to the generating-lines of an horizontal cone having its axis passing through the point. The typelevers are alternately long and short, the hangers being arranged in superposed pairs, so that the pivots 16 may be made longer than would be the case if the type-levers were of the same length and the hangers arranged side by side. The Specification in the original form, as open to inspection under Section 91 (3) (a), describes a type - lever hanger comprising two side walls which receive the coned ends of the pivot 16 and are provided with a right and left handed screw for drawing the walls together ; further the typelever is perforated to pass over the pivot 16, and is held in adjusted position against a flange on the pivot by means of a screw and a nut. This subject-matter does not appear in the Complete Specification as accepted.