GB172060A - Improvements in and relating to clocks, stopwatches, and like apparatus for indicating time or intervals of time - Google Patents

Improvements in and relating to clocks, stopwatches, and like apparatus for indicating time or intervals of time

Info

Publication number
GB172060A
GB172060A GB2221920A GB2221920A GB172060A GB 172060 A GB172060 A GB 172060A GB 2221920 A GB2221920 A GB 2221920A GB 2221920 A GB2221920 A GB 2221920A GB 172060 A GB172060 A GB 172060A
Authority
GB
United Kingdom
Prior art keywords
time
motor
clocks
disengaged
intervals
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
GB2221920A
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.)
JOSEPH MANNING FORD
Original Assignee
JOSEPH MANNING FORD
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 JOSEPH MANNING FORD filed Critical JOSEPH MANNING FORD
Priority to GB2221920A priority Critical patent/GB172060A/en
Publication of GB172060A publication Critical patent/GB172060A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F8/00—Apparatus for measuring unknown time intervals by electromechanical means
    • G04F8/003—Apparatus for measuring unknown time intervals by electromechanical means using continuously running driving means

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Unknown Time Intervals (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

172,060. Wood, A. B., and Ford, J. M. July 26, 1920. Electric clocks; driving - mechanism; stop mechanism.-In time indicators such as clocks and stop watches of the kind in which a member is rotated at constant speed by means such as a " phonic " motor, a second member is arranged to engage and rotate with the first member and to indicate time or intervals of time, and is instantly stopped when disengaged from the first member. Fig. 1 shows a diagrammatic arrangement in which 1 represents a " phonic " motor of constant speed, 2 the gearing of the dial or second member mounted on a spring or reed 3 to enable it to be engaged with or disengaged from the motor. The engaging and disengaging means may be mechanical or electrical; in the latter case an electromagnet 4 may be employed, the spring 3 constituting its armature. A brake 5 is provided for instantly arresting the rotation of the dial gear when disengaged from the motor.
GB2221920A 1920-07-26 1920-07-26 Improvements in and relating to clocks, stopwatches, and like apparatus for indicating time or intervals of time Expired GB172060A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2221920A GB172060A (en) 1920-07-26 1920-07-26 Improvements in and relating to clocks, stopwatches, and like apparatus for indicating time or intervals of time

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2221920A GB172060A (en) 1920-07-26 1920-07-26 Improvements in and relating to clocks, stopwatches, and like apparatus for indicating time or intervals of time

Publications (1)

Publication Number Publication Date
GB172060A true GB172060A (en) 1921-11-28

Family

ID=10175845

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2221920A Expired GB172060A (en) 1920-07-26 1920-07-26 Improvements in and relating to clocks, stopwatches, and like apparatus for indicating time or intervals of time

Country Status (1)

Country Link
GB (1) GB172060A (en)

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