Title of Invention

AN IMPROVED DEVICE FOR MOUNTING HOIST BRAKE COIL IN BLAST FURNACE SKIP HOIST

Abstract The improve skip hoist brake construction comprising a metallic plate of one side is machined and a made a groove of 5-10 mm thick. A non-ferrous metal plate of 5-l0 mm is made suitable to match with groove of metallic plate by plurality of screws. A non-ferrous metallic sheet of 1.0-2.0 mm thickness is folded round and the folded non-ferrous metallic sheet collar is joined on the non-ferrous metallic plate with the help of silver brazing rod containing 25%-30% silver content. A Rectangular copper conductor is would on the bobbin on which entitle coil is fitted on the frame of the brake and fastened it rigidly by plurality, of studs. The gap between bobbin and the frame is filled with RTV-ll silicon rubber compound and made it 100% rigid. At least two nos, round silicon flexible leads of size 10-20 sq. mm is joined parallely from the end connection of the winding and brought it outside and terminated at two side of the frame just 180 degree apart from each other so that it can be operated either of side ie left or right as per the requirement.
Full Text 1
FIELD OF THE INVENTION:
The present Invention relates to an improved device of hoist Brake

arrangement. More particularly, the present invention relates to an improved devices for brake coil mounting of hoist brake applicable in Blast furnace skip hoist.
BACK GROUND OF THE INDENTION:
In typical steel plant, the basic raw materials like iron ore, coke etc. are fed to the blast furnace by means of a skip which is operated by
a electrical hoist having a brake attachment to control the motion of
hoist The brake of the skip hoist is originally constructed by a
bobbin, which is pressed fit on cast iron plate. The problem develops in the production process that on continuous usages of skip hoist the cast iron fitting on the bobbin became loose and the entire bobbin was starting false rotating. As a result the leads of the coil getting tension, and causes snapping of lead. Secondly false rotation may cause accident at the work center. Thirdly,, damage the metallic

body of the bobbin due to sudden impact.

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To overcome the above adversity in the production line, an emphasis is made to develop an improved hoist brake by modifying the existing bobbin of skip hoist brake construction and the frequent coil burning is reduced by using DGC Copper conductor in place of Enameled and Asbestos covering wire. Further more, a terminal board has been introduced to protect the lead form external damaged.
OBJECTS OF THE INVENTION:
It is therefore, an object of the present invention to propose an improve device for brake coil mounting of hoist brake which will eliminate the adversity of prior Art.

Another object of the present invention is to propose an improve device for brake coil mounting of hoist brake which will increase the life time of the skip hoist brake.
A further object of the present invention is to propose an improve

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The improve skip hoist brake construction comprising a metallic plate of one side is machined and a made a groove of 5-10 mm thick. A non-ferrous metal plate of 5-l0 mm is made suitable to match with groove of metallic plate by plurality of screws. A non-ferrous metallic sheet of 1.0-2.0 mm thickness is folded round and the folded non-ferrous metallic sheet collar is joined on the non-ferrous metallic plate with the help of silver brazing rod containing 25%-30% silver content. A Rectangular copper conductor is would on the bobbin on which entitle coil is fitted on the frame of the brake and fastened it rigidly by plurality, of studs. The gap between bobbin and the frame is filled with RTV-ll silicon rubber compound and made it 100% rigid. At least two nos, round silicon flexible leads of size 10-20 sq. mm is joined parallely from the end connection of the winding and brought it outside and terminated at two side of the frame just 180 degree apart from each other so that it can be operated either of side ie left or right as per the requirement.

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frame just 180 degree apart from each other so that it can be operated either of side ie left or right as per the requirement,
DETAILS DESCRIPTION OF ACCOMPANYING DRAWING:

Fig - 1 Shows isometric view showing the crack generated on the
body of the skip hoist brake body in prior Art
Fig - 2 Slows a schematic diagram of isometric view of sidewall of
bobbin with machined groove.
Fig - 3 A schematic diagram showing 6-10 mm non-ferrous metal
round plate to be inserted in the metallic plate groove.
Fig - 4 Showing a schematic diagram of non-ferrous metal plate
fastening with metallic plate by means of plurality screws.
Fig - 5 Shows an isometric view of Terminal board in the present
invention.
Fig - 6 Shows Existing Skip Hoist Brake in Blast Furnace as per
prior Art.
Fig - 7 Shows Existing and Modified Skip Hoist Brake assembly as
per new invention.

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BRIEF DESCRIPTION OF A PREFERRED EMBODIMENT OF
THE INVENTION:
Fig - 2 Shows the metallic plate (4) of one side of the bobbin (1) . machined and made a groove of 5-10 mm thick (2) to fit non-ferrous metal parts (3).
Fig - 3 Shows a non-ferrous metal plate (3) of 6-10 mm is made to be inserted in the groove (2) of metallic plate to cover the groove (2) which acts as a bearing material.
Fig - 4 Shows the non-ferrous metal plate (3) is in assembled condition with metallic plate (4) and (fastened with the metallic plate (4) with plurality of screws (5) after inserting the coil. Fig - 5 Shows a terminal board (7) on cover of the bobbin (1) and disposed terminal point (6.6)
Fig - 6 Shows a schematic diagram of Existing body, Existing Coil bobbin, existing bobbin assembly and existing skip hoist brake coil in prior Art of Fig-l. Fig - 7 Shows a schematic diagram of Modified Coil bobbin,

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Modified bobbin assembly and modified skip hoist brake coil as per invention.

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We claim
1. An improved device for brake coil mounting of hoist brake applicable in Blast furnace skip hoist comprising
- a bobbin having two side walls consisting of a metal plate which
is impregnated with a 5-8 mm non-ferrous metal plate on outer
surface rigidly fastened with plurality of screws which acts as
bearing means and
- a rectangular copper conductor wound on the bobbin on which the
entire coils are fitted on the frame of the brake and fastened rigidly
with plurality of studs which creates tmagnetic field and
- At least two round silicon flexible leads of size 10-15 sqr. mm are
joined parallely from the end connection of the winding and brought
out side and terminated at two side of the frame about 180 deg apart
from each other for direct electrical connection.
2. The device as claimed in claim 1 wherein a folded non-ferrous sheet of 1 -2 mm thickness coller is joined on the parting line of non-ferrous plate and metallic plate with the help of silver brazing rod containing 25%-30% silver.

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3. The device as claimed in claim 1 wherein the gap between the
bobbin and the frame is filled with RTV - 11 silicon rubber compound
in order to make it 100% rigid.
4. The device as claimed in claim 1, wherein a non-ferrous metal
like brass, gun metal, bearing material can be used.
5. The device as claimed in claim 1 wherein the metallic walls of he
bobbin are like C.I. plate MS plate, stainless steel plate can be used
6. A improved device for brake coil mounting of hoist brake
applicable in Blast furnace skip hoist as substantially illustrated and
described herein along with accompanying drawings.


The improve skip hoist brake construction comprising a metallic plate of one side is machined and a made a groove of 5-10 mm thick. A non-ferrous metal plate of 5-l0 mm is made suitable to match with groove of metallic plate by plurality of screws. A non-ferrous metallic sheet of 1.0-2.0 mm thickness is folded round and the folded non-ferrous metallic sheet collar is joined on the non-ferrous metallic plate with the help of silver brazing rod containing 25%-30% silver content. A Rectangular copper conductor is would on the bobbin on which entitle coil is fitted on the frame of the brake and fastened it rigidly by plurality, of studs. The gap between bobbin and the frame is filled with RTV-ll silicon rubber compound and made it 100% rigid. At least two nos, round silicon flexible leads of size 10-20 sq. mm is joined parallely from the end connection of the winding and brought it outside and terminated at two side of the frame just 180 degree apart from each other so that it can be operated either of side ie left or right as per the requirement.

Documents:

01222-kol-2006 abstract.pdf

01222-kol-2006 assingment.pdf

01222-kol-2006 claims.pdf

01222-kol-2006 correspondencotherts.pdf

01222-kol-2006 description(complete).pdf

01222-kol-2006 drawigs.pdf

01222-kol-2006 form1.pdf

01222-kol-2006 form2.pdf

01222-kol-2006 form3.pdf

01222-kol-2006-correspondence-1.1.pdf

01222-kol-2006-form-9.pdf

1222-KOL-2006-ABSTRACT 1.1.pdf

1222-KOL-2006-ABSTRACT 1.2.pdf

1222-KOL-2006-ABSTRACT-1.3.pdf

1222-KOL-2006-AMANDED CLAIMS-1.1.pdf

1222-KOL-2006-AMANDED CLAIMS.pdf

1222-KOL-2006-CANCELLED PAGES.pdf

1222-KOL-2006-CLAIMS.pdf

1222-KOL-2006-CORRESPONDENCE 1.1.pdf

1222-KOL-2006-CORRESPONDENCE-1.2.pdf

1222-KOL-2006-CORRESPONDENCE.1.3.pdf

1222-KOL-2006-DESCRIPTION (COMPLETE) 1.1.pdf

1222-KOL-2006-DRAWINGS 1.1.pdf

1222-KOL-2006-EXAMINATION REPORT.1.3.pdf

1222-KOL-2006-FORM 1 1.1.pdf

1222-KOL-2006-FORM 18.1.3.pdf

1222-KOL-2006-FORM 2 1.1.pdf

1222-KOL-2006-FORM 3.1.3.pdf

1222-KOL-2006-FORM 9.1.3.pdf

1222-KOL-2006-GPA.1.3.pdf

1222-KOL-2006-GRANTED-ABSTRACT.pdf

1222-KOL-2006-GRANTED-CLAIMS.pdf

1222-KOL-2006-GRANTED-DESCRIPTION (COMPLETE).pdf

1222-KOL-2006-GRANTED-FORM 1.pdf

1222-KOL-2006-GRANTED-FORM 2.pdf

1222-KOL-2006-GRANTED-LETTER PATENT.pdf

1222-KOL-2006-GRANTED-SPECIFICATION.pdf

1222-KOL-2006-REPLY TO EXAMINATION REPORT.1.3.pdf

1222-KOL-2006-REPLY TO EXAMINATION REPORT.pdf


Patent Number 248426
Indian Patent Application Number 1222/KOL/2006
PG Journal Number 28/2011
Publication Date 15-Jul-2011
Grant Date 13-Jul-2011
Date of Filing 15-Nov-2006
Name of Patentee TATA STEEL LIMITED
Applicant Address JAMSHEDPUR 831001, INDIA.
Inventors:
# Inventor's Name Inventor's Address
1 S. DUTTA MED,ELECTRICAL,TATA STEEL LIMITED, JAMSHEDPUR 831001, INDIA.
PCT International Classification Number B66B9/00
PCT International Application Number N/A
PCT International Filing date
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 NA