GB681723A - Improvements in hoisting or lifting apparatus - Google Patents
Improvements in hoisting or lifting apparatusInfo
- Publication number
- GB681723A GB681723A GB29736/49A GB2973649A GB681723A GB 681723 A GB681723 A GB 681723A GB 29736/49 A GB29736/49 A GB 29736/49A GB 2973649 A GB2973649 A GB 2973649A GB 681723 A GB681723 A GB 681723A
- Authority
- GB
- United Kingdom
- Prior art keywords
- chain
- wheel
- pivoted
- chain wheel
- motor
- 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
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D3/00—Portable or mobile lifting or hauling appliances
- B66D3/18—Power-operated hoists
- B66D3/24—Applications of limit switches
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
681,723. Chain hoists. KULTNER, H. A. Nov. 21, 1949. [April 28. 1949: Oct. 20, 1949] Nos. 29736/49 and 29737/49. Class 78 (v). In a hoist comprising a lifting chain 17 driven by a chain wheel 10, a member 24 is coupled to the wheel and rotated to interrupt the drive to the wheel when the chain climbs relatively thereto. Fig. 1. Lifting chain 17 is secured at 50 and passes round and is driven by chain wheel 10, which in turn is driven from motor 16 through worm 15 and wormwheel 14 and shaft 13, the whole being supported between plates 11 and 12 carried by wheels 51 along girder 52. The motor 16 is operated through two-armed lever 21, pivoted at 22, a pull on operating handle 19 causing lever 21 to move anticlockwise to make switch 23 to cause motor 16 to drive the chain wheel to lift ; and a pull on operating handle 20 likewise causing the motor 16 to drive the chain wheel to lower. The two-armed lever 21 is also operated by releasing member 24, which is freely pivoted on shaft 13 and is resiliently held by helical spring 27, which spring is wrapped round shaft 13 and engages a pin 29 secured on said member 24 and a pin 28 secured to the frame 11-12 ; the said member 24 being operated either when the chain rides up the chain wheel and engages and locks arcuate guide 30 (fixed to said member 24) to the chain wheel, or when limit stop members (e.g. load hook 18) engages either of links 31 and 32 pivoted to the said member 18 or when the chain twists and again engages either of said links 31 and 32 due to the fact that the chain passes through chain-shaped holes 33 and 34 formed therein ; the operation of armed lever 21 by these means serving to bring said armed lever to the intermediate position whereby the motor current is cut off. Fig. 2. In this modification, the switch 23 is omitted and there is included a lever 38 pivoted to said member 24 and operating a pivoted double pawl 37 co-operating with ratchet 38 carried on the shaft 100. The rotary movement of the member 24 causes pawl 37 to engage ratchet 35 to prevent of chain wheel by hand chain 50.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE681723X | 1949-04-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB681723A true GB681723A (en) | 1952-10-29 |
Family
ID=20314937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB29736/49A Expired GB681723A (en) | 1949-04-28 | 1949-11-21 | Improvements in hoisting or lifting apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB681723A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0118302A1 (en) * | 1983-03-02 | 1984-09-12 | Elephant Chain Block Company Limited | Motor-driven chain block |
-
1949
- 1949-11-21 GB GB29736/49A patent/GB681723A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0118302A1 (en) * | 1983-03-02 | 1984-09-12 | Elephant Chain Block Company Limited | Motor-driven chain block |
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