FR844521A - Dispositif de sécurité pour échelles doubles - Google Patents
Dispositif de sécurité pour échelles doublesInfo
- Publication number
- FR844521A FR844521A FR844521DA FR844521A FR 844521 A FR844521 A FR 844521A FR 844521D A FR844521D A FR 844521DA FR 844521 A FR844521 A FR 844521A
- Authority
- FR
- France
- Prior art keywords
- safety device
- double ladders
- ladders
- double
- safety
- 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
Classifications
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C1/00—Ladders in general
- E06C1/02—Ladders in general with rigid longitudinal member or members
- E06C1/14—Ladders capable of standing by themselves
- E06C1/16—Ladders capable of standing by themselves with hinged struts which rest on the ground
- E06C1/18—Ladders capable of standing by themselves with hinged struts which rest on the ground with supporting struts formed as ladders
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C1/00—Ladders in general
- E06C1/02—Ladders in general with rigid longitudinal member or members
- E06C1/14—Ladders capable of standing by themselves
- E06C1/16—Ladders capable of standing by themselves with hinged struts which rest on the ground
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3032138A GB509107A (en) | 1938-10-20 | 1938-10-20 | Locking device for step ladders |
Publications (1)
Publication Number | Publication Date |
---|---|
FR844521A true FR844521A (fr) | 1939-07-26 |
Family
ID=10305784
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR844521D Expired FR844521A (fr) | 1938-10-20 | 1938-10-08 | Dispositif de sécurité pour échelles doubles |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR844521A (fr) |
GB (1) | GB509107A (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2521114A (en) * | 1949-05-14 | 1950-09-05 | Bell Telephone Labor Inc | Combined lock and spreader for portable rolling ladders |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2739861A (en) * | 1953-11-12 | 1956-03-27 | Harold R Nielson | Means for holding a toggle joint in buckled adjustment |
-
1938
- 1938-10-08 FR FR844521D patent/FR844521A/fr not_active Expired
- 1938-10-20 GB GB3032138A patent/GB509107A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2521114A (en) * | 1949-05-14 | 1950-09-05 | Bell Telephone Labor Inc | Combined lock and spreader for portable rolling ladders |
Also Published As
Publication number | Publication date |
---|---|
GB509107A (en) | 1939-07-11 |
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