DE623530C - - Google Patents
Info
- Publication number
- DE623530C DE623530C DENDAT623530D DE623530DA DE623530C DE 623530 C DE623530 C DE 623530C DE NDAT623530 D DENDAT623530 D DE NDAT623530D DE 623530D A DE623530D A DE 623530DA DE 623530 C DE623530 C DE 623530C
- Authority
- DE
- Germany
- Prior art keywords
- valve
- sand
- valve seat
- return
- hourglass
- 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.)
- Active
Links
- 239000004576 sand Substances 0.000 claims description 16
- 238000005259 measurement Methods 0.000 claims 1
- 239000007788 liquid Substances 0.000 description 4
- 239000012530 fluid Substances 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
Classifications
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- 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
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- G—PHYSICS
- G04—HOROLOGY
- G04F—TIME-INTERVAL MEASURING
- G04F7/00—Apparatus for measuring unknown time intervals by non-electric means
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Lift Valve (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE623530C true DE623530C (enrdf_load_stackoverflow) |
Family
ID=576501
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT623530D Active DE623530C (enrdf_load_stackoverflow) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE623530C (enrdf_load_stackoverflow) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6260996B1 (en) | 2000-01-27 | 2001-07-17 | Richard K. Coleman, Jr. | Hourglass with bypass duct |
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0
- DE DENDAT623530D patent/DE623530C/de active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6260996B1 (en) | 2000-01-27 | 2001-07-17 | Richard K. Coleman, Jr. | Hourglass with bypass duct |