DE143939C - - Google Patents
Info
- Publication number
- DE143939C DE143939C DENDAT143939D DE143939DA DE143939C DE 143939 C DE143939 C DE 143939C DE NDAT143939 D DENDAT143939 D DE NDAT143939D DE 143939D A DE143939D A DE 143939DA DE 143939 C DE143939 C DE 143939C
- Authority
- DE
- Germany
- Prior art keywords
- barrier
- drive pulley
- pin
- drive
- boom
- 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
- 230000004888 barrier function Effects 0.000 claims description 22
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 230000000630 rising effect Effects 0.000 claims 1
- 230000007704 transition Effects 0.000 claims 1
- 208000010201 Exanthema Diseases 0.000 description 1
- 201000005884 exanthem Diseases 0.000 description 1
- 206010037844 rash Diseases 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L29/00—Safety means for rail/road crossing traffic
- B61L29/24—Means for warning road traffic that a gate is closed or closing, or that rail traffic is approaching, e.g. for visible or audible warning
- B61L29/243—Transmission mechanism or acoustical signals for gates
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE143939C true DE143939C (en:Method) |
Family
ID=411406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT143939D Active DE143939C (en:Method) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE143939C (en:Method) |
-
0
- DE DENDAT143939D patent/DE143939C/de active Active
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