GB723327A - Safety device for lifts especially scaffold lifts - Google Patents
Safety device for lifts especially scaffold liftsInfo
- Publication number
- GB723327A GB723327A GB2834351A GB2834351A GB723327A GB 723327 A GB723327 A GB 723327A GB 2834351 A GB2834351 A GB 2834351A GB 2834351 A GB2834351 A GB 2834351A GB 723327 A GB723327 A GB 723327A
- Authority
- GB
- United Kingdom
- Prior art keywords
- door
- bolts
- lifts
- cage
- safety device
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B13/00—Doors, gates, or other apparatus controlling access to, or exit from, cages or lift well landings
- B66B13/02—Door or gate operation
- B66B13/14—Control systems or devices
- B66B13/16—Door or gate locking devices controlled or primarily controlled by condition of cage, e.g. movement or position
- B66B13/18—Door or gate locking devices controlled or primarily controlled by condition of cage, e.g. movement or position without manually-operable devices for completing locking or unlocking of doors
Landscapes
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Elevator Door Apparatuses (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
Abstract
723,327. Lifts. NORDGARD. P. O. Dec. 3, 1951, No. 28343/51. Class 78 (3). A safety device for retaining a lift cage at a landing when the door 16 is in its horizontal, open, position, comprises a pair of U-shaped bolts 24, Fig. 9, which are moved above lateral projections (not shown) on guides 29 by a linkage operable by the door. This linkage comprises a lever 11 secured to the door, a.link 10 pivoted at 30 to a lever 9 which is fulcrumed to the cage frame at 31 and is connected bv a link 8 to a " T "-shaped member 6 pivoted to the frame at 32, and a pair of links 5 which connect member 6 to the bolts 24 slidable in guides 3; springs 41 being provided to urge the bolts to a retracted position. In operation outward and downward movement of the door to a horizontal position effects extension of the bolts whilst further downward movement of the door, due to upward movement of the cage with the door open or movement of the door to a closed position, retracts the bolts. In a modification, Fig. 2 (not shown), the springs are dispensed with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2834351A GB723327A (en) | 1951-12-03 | 1951-12-03 | Safety device for lifts especially scaffold lifts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2834351A GB723327A (en) | 1951-12-03 | 1951-12-03 | Safety device for lifts especially scaffold lifts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB723327A true GB723327A (en) | 1955-02-09 |
Family
ID=10274178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2834351A Expired GB723327A (en) | 1951-12-03 | 1951-12-03 | Safety device for lifts especially scaffold lifts |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB723327A (en) |
-
1951
- 1951-12-03 GB GB2834351A patent/GB723327A/en not_active Expired
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