GB376524A - An improved electric time switch - Google Patents
An improved electric time switchInfo
- Publication number
- GB376524A GB376524A GB22254/31A GB2225431A GB376524A GB 376524 A GB376524 A GB 376524A GB 22254/31 A GB22254/31 A GB 22254/31A GB 2225431 A GB2225431 A GB 2225431A GB 376524 A GB376524 A GB 376524A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cylinder
- ball
- guide
- sand
- sandglass
- 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
- 239000004576 sand Substances 0.000 abstract 4
- 239000011521 glass Substances 0.000 abstract 2
- 230000005484 gravity Effects 0.000 abstract 2
- 230000000284 resting effect Effects 0.000 abstract 2
- 238000006073 displacement reaction Methods 0.000 abstract 1
- 230000000979 retarding effect Effects 0.000 abstract 1
- 238000005096 rolling process Methods 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G04—HOROLOGY
- G04F—TIME-INTERVAL MEASURING
- G04F1/00—Apparatus which can be set and started to measure-off predetermined or adjustably-fixed time intervals without driving mechanisms, e.g. egg timers
- G04F1/04—Apparatus which can be set and started to measure-off predetermined or adjustably-fixed time intervals without driving mechanisms, e.g. egg timers by movement or acceleration due to gravity
- G04F1/06—Apparatus which can be set and started to measure-off predetermined or adjustably-fixed time intervals without driving mechanisms, e.g. egg timers by movement or acceleration due to gravity by flowing-away of a prefixed quantity of fine-granular or liquid materials, e.g. sand-glass, water-clock
- G04F1/066—Apparatus which can be set and started to measure-off predetermined or adjustably-fixed time intervals without driving mechanisms, e.g. egg timers by movement or acceleration due to gravity by flowing-away of a prefixed quantity of fine-granular or liquid materials, e.g. sand-glass, water-clock using electrical contact device
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Switches Operated By Changes In Physical Conditions (AREA)
- Toys (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE47190X | 1930-08-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB376524A true GB376524A (en) | 1932-07-14 |
Family
ID=5625552
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB22254/31A Expired GB376524A (en) | 1930-08-06 | 1931-08-06 | An improved electric time switch |
Country Status (3)
| Country | Link |
|---|---|
| AT (1) | AT133814B (enrdf_load_stackoverflow) |
| DK (1) | DK47190C (enrdf_load_stackoverflow) |
| GB (1) | GB376524A (enrdf_load_stackoverflow) |
-
1931
- 1931-08-04 DK DK47190D patent/DK47190C/da active
- 1931-08-05 AT AT133814D patent/AT133814B/de active
- 1931-08-06 GB GB22254/31A patent/GB376524A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| AT133814B (enrdf_load_stackoverflow) | 1933-06-26 |
| DK47190C (da) | 1933-04-10 |
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