GB781767A - Calendar timepiece - Google Patents

Calendar timepiece

Info

Publication number
GB781767A
GB781767A GB2072254A GB2072254A GB781767A GB 781767 A GB781767 A GB 781767A GB 2072254 A GB2072254 A GB 2072254A GB 2072254 A GB2072254 A GB 2072254A GB 781767 A GB781767 A GB 781767A
Authority
GB
United Kingdom
Prior art keywords
calendar
day
cams
date
clock
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
GB2072254A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB2072254A priority Critical patent/GB781767A/en
Publication of GB781767A publication Critical patent/GB781767A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B19/00—Indicating the time by visual means
    • G04B19/24—Clocks or watches with date or week-day indicators, i.e. calendar clocks or watches; Clockwork calendars
    • G04B19/243—Clocks or watches with date or week-day indicators, i.e. calendar clocks or watches; Clockwork calendars characterised by the shape of the date indicator
    • G04B19/247—Clocks or watches with date or week-day indicators, i.e. calendar clocks or watches; Clockwork calendars characterised by the shape of the date indicator disc-shaped
    • G04B19/253—Driving or releasing mechanisms
    • G04B19/25333—Driving or releasing mechanisms wherein the date indicators are driven or released mechanically by a clockwork movement
    • G04B19/25353—Driving or releasing mechanisms wherein the date indicators are driven or released mechanically by a clockwork movement driven or released stepwise by the clockwork movement
    • G04B19/25366—Driving or releasing mechanisms wherein the date indicators are driven or released mechanically by a clockwork movement driven or released stepwise by the clockwork movement manually corrected at the end of months having less than 31 days

Abstract

781,767. Date indicators. ELBERG, B. July 11, 1955 [July 15, 1954], No. 20722/54. Addition to 718,896. Class 106 (4). A calendar clock comprises a central hand for indicating the day of the week and rotating tens and units dials for displaying the date through two adjacent windows in the clock dial above its centre. The calendar mechanism of the parent Specification is adapted for use in clocks with weaker springs, e.g. 8-day clocks, by doubling the number of teeth of the gear-wheels 35, 64 and 70, Figs. 6, 7, thus not only halving their speed but halving the power required to overcome the restraint of the springs 37, 65 and 41 since they bear on teeth half the distance apart. In a further modi, fication the cams 33, 42 are made double cams, thus further reducing the power required to drive the calendar mechanism. To protect the gears and cams from breaking by manual adjustments of the date and day at inappropriate times the manual pinions 49, 75 are mounted on the manual adjustment shafts 22, 62 by means of friction spring clutches. The calendar indications may be distinguished from the clock indications by the use of contrasting colours.
GB2072254A 1954-07-15 1954-07-15 Calendar timepiece Expired GB781767A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2072254A GB781767A (en) 1954-07-15 1954-07-15 Calendar timepiece

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2072254A GB781767A (en) 1954-07-15 1954-07-15 Calendar timepiece

Publications (1)

Publication Number Publication Date
GB781767A true GB781767A (en) 1957-08-28

Family

ID=10150564

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2072254A Expired GB781767A (en) 1954-07-15 1954-07-15 Calendar timepiece

Country Status (1)

Country Link
GB (1) GB781767A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2142904A (en) * 1983-06-15 1985-01-30 Litton Systems Inc Safety brake for vertical lift
GB2253285A (en) * 1991-02-26 1992-09-02 Simon Joseph Greenock Timepiece

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2142904A (en) * 1983-06-15 1985-01-30 Litton Systems Inc Safety brake for vertical lift
GB2253285A (en) * 1991-02-26 1992-09-02 Simon Joseph Greenock Timepiece

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