| Title of Invention | "A MAGNETIC SAFETY HANGER" |
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| Abstract | A magnetic safety hanger made of fabricated steel comprising a permanent magnet fixed therein for actuating magnetic limit switches mounted on mobile machines when said mobile machines move close to the working area where said magnetic safety hanger is installed. |
| Full Text | FIELD OF APPLICATION The present invention relates to a magnetic safety hanger for use in the working area of an industrial plant, like for example a steel plant. The magnetic safety hanger of the present invention is an innovative tool developed for systeM-based safety of the persons working in the operating area of mobile machines. BACKGROUND OF THE INVENTION The normal practice to ensure safety for working in the vicinity of moving machines is as follows: - a) The person who is the supervisor of the concerned area is informed about the job in writing. b) The operator of the machine is informed that the work is in progress in the area of the machine which he is operating and that he is to take care. Danger tapes and red flags are pasted around the area of work. But if we look into the safety aspect of such arrangements these are ail man dependent arrangements and chances of human error always prevail. If anyone of these persons involved lose there alertness then the machine can hit the person who is working in its operating area and if temporary ladders are used or the working area is a confined space then the severity of the accident can touch the limit. SUMMARY OF THE INVENTION The main object of the present invention therefore, is to provide a magnetic safety hanger for ensuring system based safety and to eliminate or minimize chances of human error while working in the operating area of moving machines. This object can be achieved by stopping the moving machines by actuating the limit switches with the help of a permanent magnet provided in the safety hanger. Magnetic safety hanger is a tool made of steel on which a strong permanent magnet is fixed. This can be easily carried to different places in the work area and mounted on a railing near the work area. Thus the present invention provides a magnetic safety hanger made of fabricated steel comprising a permanet magnet fixed therein for actuating magnetic limit switches mounted on mobile machines when said mobile machines move close to the working area where said magnetic safety hanger is installed. BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS The invention can now be described with the help of the figures of the accompanying drawings where Fig. 1 shows conventional safety practice using danger tape and red flag before starting the work. Fig. 2 shows the stages of development of the magnetic safety hanger of the present invention. Fig. 3 shows the magnetic safety hanger of the present invention. The magnetic safety hanger of the present invention can be used at a place where work is to be carried out in the operating area of mobile machines like at the bench level of coke oven batteries, walkway of crane gantry and other places of similar type. The whole arrangement works in the following manner. Magnetic limit switches are mounted on the mobile machine at both ends near the railing in a manner so that they are In alignment with the magnetic safety hanger when mounted on the railing. Before starting the work the magnetic safety hanger can be placed on the railing and a trial taken. When machine comes near the work area, the mangetic limit switch is actuated by the magnet. Upon actuation of the limit switch the machine stops in accordance with the logic provided without the intervention of any person. A message can also be displayed on the operator screen indicating that persons are at work and the machine cannot move in this direction any further, although the machine can move away from the place. This whole arrangement ensures safety without human intervention i.e. total system based safety. 6. The safety hanger as claimed in the preceding claims, wherein a display is provided on the screen of the operator indicating that the machine cannot move further because men are at work. 7. A magnetic safety hanger made of fabricated steel, substantially as herein described and illustrated in the accompanying drawings. WE CLAIM 1. A magnetic safety hanger made of fabricated steel, characterized in that said magnetic hanger comprises a permanent magnet for actuating a magnetic limit switch mounted on mobile machines for stopping the mobile machines when said mobile machines move close to the working area where said magnetic safety hanger is installed. 2. The safety hanger as claimed in claim 1, wherein said fabricated steel structure is mountable on a railing near the working area. 3. The safety hanger as claimed in claim 1 or 2, wherein said safety hanger is mounted such that it is in alignment with the magnetic limit switches mounted said mobile machines. 4. The safety hanger as claimed in claim 3, wherein said limit switches are mounted at both ends of said mobile machines. 5. The safety hanger as claimed in the preceding claims wherein appropriate logic control is provided for stopping said mobile machines when they move close to said safety hanger. A magnetic safety hanger made of fabricated steel comprising a permanent magnet fixed therein for actuating magnetic limit switches mounted on mobile machines when said mobile machines move close to the working area where said magnetic safety hanger is installed. |
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00034-kol-2005-correspondence-1.1.pdf
00034-kol-2005-correspondence-1.2.pdf
00034-kol-2005-correspondence-1.3.pdf
00034-kol-2005-correspondence.pdf
00034-kol-2005-description(complete)-1.1.pdf
00034-kol-2005-description(complete).pdf
00034-kol-2005-drawings-1.1.pdf
34-kol-2005-granted-abstract.pdf
34-kol-2005-granted-claims.pdf
34-kol-2005-granted-correspondence.pdf
34-kol-2005-granted-description (complete).pdf
34-kol-2005-granted-drawings.pdf
34-kol-2005-granted-examination report.pdf
34-kol-2005-granted-form 1.pdf
34-kol-2005-granted-form 13.pdf
34-kol-2005-granted-form 18.pdf
34-kol-2005-granted-form 2.pdf
34-kol-2005-granted-form 3.pdf
34-kol-2005-granted-form 5.pdf
34-kol-2005-granted-reply to examination report.pdf
34-kol-2005-granted-specification.pdf
| Patent Number | 222732 | |||||||||||||||||||||
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| Indian Patent Application Number | 34/KOL/2005 | |||||||||||||||||||||
| PG Journal Number | 34/2008 | |||||||||||||||||||||
| Publication Date | 22-Aug-2008 | |||||||||||||||||||||
| Grant Date | 21-Aug-2008 | |||||||||||||||||||||
| Date of Filing | 25-Jan-2005 | |||||||||||||||||||||
| Name of Patentee | TATA STEEL LIMITED | |||||||||||||||||||||
| Applicant Address | RESEARCH AND DEVELOPMENT AND SCIENCE SERVICESS DIVISION, JAMSHEDPUR | |||||||||||||||||||||
Inventors:
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| PCT International Classification Number | A47G 25/28 | |||||||||||||||||||||
| PCT International Application Number | N/A | |||||||||||||||||||||
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