GB321249A - Safety device for hoists - Google Patents
Safety device for hoistsInfo
- Publication number
- GB321249A GB321249A GB2376528A GB2376528A GB321249A GB 321249 A GB321249 A GB 321249A GB 2376528 A GB2376528 A GB 2376528A GB 2376528 A GB2376528 A GB 2376528A GB 321249 A GB321249 A GB 321249A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ram
- brake
- blocks
- raised
- segmental
- 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
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
- B66B5/028—Safety devices separate from control system in case of power failure, for hydraulical lifts, e.g. braking the hydraulic jack
Landscapes
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Braking Arrangements (AREA)
Abstract
321,249. Wagstaff, J. Aug. 17, 1928. Supports for vehicles.-A fluid-pressure-actuated hoist which may be fitted with a platform with tracks for the wheels of a motor vehicle is provided with a combined braking and selfsustaining gear comprising segmental blocks surrounding the ram. The ram 6 carrying the load platform 11 is raised by fluid pressure from a reservoir 9 to which compressed air can be admitted through a pipe 10. A ring 13 surrounds the upper end of the ram and carries a packing ring 14, Fig. 3, with conical recess 19. Segmental brake blocks 23, Fig. 4, fit into the recess and are normally pressed apart by springs 37. The upper parts of the brake blocks are encircled by a brake band 24 connected to an operating lever 30, Fig. 5, the brake band being normally held in the operative position by a spring 28. The brake is released when the glatform is to be raised. If the fluid pressure fails the segments are carried downwards by the ram aud are wedged into the conical recess thus holding the ram against further movement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2376528A GB321249A (en) | 1928-08-17 | 1928-08-17 | Safety device for hoists |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2376528A GB321249A (en) | 1928-08-17 | 1928-08-17 | Safety device for hoists |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB321249A true GB321249A (en) | 1929-11-07 |
Family
ID=10200950
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2376528A Expired GB321249A (en) | 1928-08-17 | 1928-08-17 | Safety device for hoists |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB321249A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3022901A (en) * | 1958-09-29 | 1962-02-27 | James L Fisher | Hoist for microphone dolly and the like |
| DE1186297B (en) * | 1961-08-26 | 1965-01-28 | Hydrel Ag | Arrangement for precise and load-independent deceleration and re-acceleration of hydraulic gears |
| FR2235077A1 (en) * | 1973-06-30 | 1975-01-24 | Rastetter Adolf | |
| EP0952104A2 (en) * | 1998-04-24 | 1999-10-27 | Montgomery Kone Inc. | Hydraulic elevator with plunger brakes |
| CN103121612A (en) * | 2013-03-15 | 2013-05-29 | 江苏科技大学 | Elevator lift car safety landing device based on air energy dissipation |
| US10423127B2 (en) | 2012-01-17 | 2019-09-24 | Fisher-Rosemount Systems, Inc. | Velocity based control in a non-periodically updated controller |
| US11199824B2 (en) | 2012-01-17 | 2021-12-14 | Fisher-Rosemount Systems, Inc. | Reducing controller updates in a control loop |
-
1928
- 1928-08-17 GB GB2376528A patent/GB321249A/en not_active Expired
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3022901A (en) * | 1958-09-29 | 1962-02-27 | James L Fisher | Hoist for microphone dolly and the like |
| DE1186297B (en) * | 1961-08-26 | 1965-01-28 | Hydrel Ag | Arrangement for precise and load-independent deceleration and re-acceleration of hydraulic gears |
| FR2235077A1 (en) * | 1973-06-30 | 1975-01-24 | Rastetter Adolf | |
| EP0952104A2 (en) * | 1998-04-24 | 1999-10-27 | Montgomery Kone Inc. | Hydraulic elevator with plunger brakes |
| EP0952104A3 (en) * | 1998-04-24 | 2000-11-08 | Montgomery Kone Inc. | Hydraulic elevator with plunger brakes |
| US6478123B2 (en) | 1998-04-24 | 2002-11-12 | Kone Inc. | Hydraulic elevator with plunger brakes |
| US10423127B2 (en) | 2012-01-17 | 2019-09-24 | Fisher-Rosemount Systems, Inc. | Velocity based control in a non-periodically updated controller |
| US11199824B2 (en) | 2012-01-17 | 2021-12-14 | Fisher-Rosemount Systems, Inc. | Reducing controller updates in a control loop |
| CN103121612A (en) * | 2013-03-15 | 2013-05-29 | 江苏科技大学 | Elevator lift car safety landing device based on air energy dissipation |
| CN103121612B (en) * | 2013-03-15 | 2015-05-13 | 江苏科技大学 | Elevator lift car safety landing device based on air energy dissipation |
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