GB191415955A - Improvements in or relating to Actions for Typewriting Machines. - Google Patents

Improvements in or relating to Actions for Typewriting Machines.

Info

Publication number
GB191415955A
GB191415955A GB191415955DA GB191415955A GB 191415955 A GB191415955 A GB 191415955A GB 191415955D A GB191415955D A GB 191415955DA GB 191415955 A GB191415955 A GB 191415955A
Authority
GB
United Kingdom
Prior art keywords
cam
key
slot
lever
actions
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
Inventor
William John Mellersh-Jackson
Original Assignee
William John Mellersh-Jackson
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by William John Mellersh-Jackson filed Critical William John Mellersh-Jackson
Application granted granted Critical
Publication of GB191415955A publication Critical patent/GB191415955A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J7/00—Type-selecting or type-actuating mechanisms
    • B41J7/02—Type-lever actuating mechanisms

Landscapes

  • Preliminary Treatment Of Fibers (AREA)
  • Impression-Transfer Materials And Handling Thereof (AREA)

Abstract

15,955. Jackson, W. J. Mellersh-, [Excelsior Fahrrad-Werke Geb. Conrad & Patz Akt.-Ces.]. July 3. Type-lever actions.-In actions in which the key-levers 1 are formed with cam-slots engaging intermediate levers 7 connected to the typelevers 9, the touch is improved by replacing the usual cam-slots, struck from centres below the key-levers, by cam-slots of the following character. The cam-slot shown in Fig. 1 is struck from a centre above the key-lever, thus causing the horizontal force acting on the intermediate lever to increase as the key-lever is depressed, so that an increased leverage is provided for operating the universal bar 10 towards the end of the stroke. The old form of camslot may, as shown in Fig. 5, be provided with a starting-part d which is of greater curvature than the remainder of the slot, the arrangement causing the horizontal force to be greatest initially so that an easy start is provided for the key-lever. This arrangement may be applied to a cam-slot of the kind shown in Fig. 1, the cam-slot, Fig. 3, having a starting-part d which is curved in the opposite direction to the remainder of the slot. In this case, the horizontal force is greatest initially and decreases towards the middle of the stroke and then increases towards the end.
GB191415955D 1914-07-03 1914-07-03 Improvements in or relating to Actions for Typewriting Machines. Expired GB191415955A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB191415955T 1914-07-03

Publications (1)

Publication Number Publication Date
GB191415955A true GB191415955A (en) 1915-07-05

Family

ID=34360866

Family Applications (1)

Application Number Title Priority Date Filing Date
GB191415955D Expired GB191415955A (en) 1914-07-03 1914-07-03 Improvements in or relating to Actions for Typewriting Machines.

Country Status (2)

Country Link
DE (1) DE280558C (en)
GB (1) GB191415955A (en)

Also Published As

Publication number Publication date
DE280558C (en)

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