GB154220A - Improvements in stop watches - Google Patents
Improvements in stop watchesInfo
- Publication number
- GB154220A GB154220A GB33193/20A GB3319320A GB154220A GB 154220 A GB154220 A GB 154220A GB 33193/20 A GB33193/20 A GB 33193/20A GB 3319320 A GB3319320 A GB 3319320A GB 154220 A GB154220 A GB 154220A
- Authority
- GB
- United Kingdom
- Prior art keywords
- arbor
- pinion
- wheel
- seconds hand
- actuation
- 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
Links
- 230000003534 oscillatory effect Effects 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G04—HOROLOGY
- G04F—TIME-INTERVAL MEASURING
- G04F7/00—Apparatus for measuring unknown time intervals by non-electric means
- G04F7/04—Apparatus for measuring unknown time intervals by non-electric means using a mechanical oscillator
- G04F7/08—Watches or clocks with stop devices, e.g. chronograph
- G04F7/0866—Special arrangements
- G04F7/0876—Split-time function, e.g. rattrappante
-
- G—PHYSICS
- G04—HOROLOGY
- G04F—TIME-INTERVAL MEASURING
- G04F7/00—Apparatus for measuring unknown time intervals by non-electric means
- G04F7/04—Apparatus for measuring unknown time intervals by non-electric means using a mechanical oscillator
- G04F7/08—Watches or clocks with stop devices, e.g. chronograph
- G04F7/0842—Watches or clocks with stop devices, e.g. chronograph with start-stop control mechanisms
- G04F7/0857—Watches or clocks with stop devices, e.g. chronograph with start-stop control mechanisms with single push-button or actuation member for start-stop and reset
-
- G—PHYSICS
- G04—HOROLOGY
- G04F—TIME-INTERVAL MEASURING
- G04F7/00—Apparatus for measuring unknown time intervals by non-electric means
- G04F7/04—Apparatus for measuring unknown time intervals by non-electric means using a mechanical oscillator
- G04F7/08—Watches or clocks with stop devices, e.g. chronograph
- G04F7/0866—Special arrangements
- G04F7/088—Special arrangements with display of fraction of seconds, e.g. foudroyante
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Unknown Time Intervals (AREA)
- Measurement Of Distances Traversed On The Ground (AREA)
Abstract
154,220. Webster, B., (Assignee of Pastor, T.). Nov. 25, 1919, [Convention date]. Stop mechanism.-In stop watches of the kind wherein a fine toothed wheel mounted on the axis of the second wheel actuates a pinion on the arbor of the seconds hand, such pinion being thrown into and out of gear by an oscillatory movement of the said arbor which passes through the cylindrically bored centre wheel and bears at the lower end in a sleeve or plug attached to the centre wheel, the sleeve or plug is replaced by a bearing disk 18, Fig. 5, attached to the arbor 15 and, in place of a simple spring to force the pinion into gear, there is provided a double looped spring 16 having an extension whereby the tension may be adjusted. As is usual, the seconds hand is started, stopped, and returned to zero by three successive actuations of the press button 11, Fig. 2. The rotation of the cam 4 by the actuation of the button 11 allows a bell crank 3 to oscillate the arbor 15 and consequently gear the pinion 2 with a finetoothed wheel 1 and at the same time moves a lever 12 away from a heart cam 14. The second actuation withdraws the arbor and so stops the seconds hand, while the third actuation allows the lever 12 to press on the heart cam 14 and return the seconds hand to zero.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US340639A US1493125A (en) | 1919-11-25 | 1919-11-25 | Stop watch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB154220A true GB154220A (en) | 1921-09-29 |
Family
ID=23334303
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB33193/20A Expired GB154220A (en) | 1919-11-25 | 1920-11-24 | Improvements in stop watches |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US1493125A (en) |
| CH (1) | CH92437A (en) |
| GB (1) | GB154220A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2505237A (en) * | 1943-08-18 | 1950-04-25 | Yale & Towne Mfg Co | Rate of load change measuring instrument |
| GB1405102A (en) * | 1971-08-20 | 1975-09-03 | Smiths Industries Ltd | Stop watches |
-
1919
- 1919-11-25 US US340639A patent/US1493125A/en not_active Expired - Lifetime
-
1920
- 1920-10-30 CH CH92437D patent/CH92437A/en unknown
- 1920-11-24 GB GB33193/20A patent/GB154220A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CH92437A (en) | 1922-01-02 |
| US1493125A (en) | 1924-05-06 |
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