BRAKE SYSTEM FOR WD56 LOCOMOTIVE FIELD OF THE INVENTION
The present invention relates to a device for brake adjustment. More particularly, the present invention relates to an improved brake adjustable device adoptable in a Railway Locomotive.
BACKGROUND OF THE INVENTION
A railway locomotive is provided with a brake and brake mounting
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attachment to control the motion of the locomotive. During usage for a certain period or sudden service failure] brake shoes are required to replace and also require to adjust a gap between the brake shoe and the outer circumference of railway wheel.
The existing system of adjustment of gap between the brake shoe and the wheel is performed by changing the position of holes among plurality of holes which are provided on both sides of a Tie-Rod. The problems evolve during changing of old wear out tie-rod on in maintenance of adjustment of tie-rod between brake shoe and wheels are as follows:-
1) The weighty tie-rod hangs from two pins at two side end, creates trouble to the operator for mounting and dismounting.

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2) Finer brake adjustment on wheel with the existing hole type tie-rod
was not possible.
3) The brake with existing tie-rod attachment affects safety of
locomotive.
4) The operation of brake adjustment is not ergonomical and labour
intensive.
5) 3 to 4mm. gap between wheel and brake shoes was not possible for
accurate adjustment in existing hole type-rod.
6) Side adjustment is not ergonomical.
7) Accurate adjustment for brake is not possible at railway yard site.
8) Frequent complaint raised by the driver for weak brake.
9) Due to space constraint, there are chances of finger injury during
replacement period.
10) The existing tie-rod can not be adjusted without removal.

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To overcome such difficulties in the existing tie-rod for brake adjustment an emphasize on development of an improved device for adjustment of brake is made in the prevent invention.
OBJECTS OF THE INVENTION
It is therefore, an object of the present invention to propose an improved brake adjustable device adoptable in railway locomotives which eliminates the disadvantages of prior art.
Another object of the present invention is to propose an improved brake adjustable device adoptable in railway locomotives which is easy to operate.
A still another of the present invention is to propose an improved brake adjustable device adoptable in railway locomotives which reduces the brake-related maintence time by 60%
A further object of the present invention is to propose an improved brake adjustable device adoptable in railway locomotives which enables for finner adjustment of brake.

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A still further object of the present invention is to propose an improved brake adjustable device adoptable in railway locomotives which can be adjusted brake of locomotives at railway yard site and is not required to bring the loco at maintenance shed for adjustment
An yet further object of the present invention is to propose an improved brake adjustable device adoptable \ in railway locomotives which eliminates the loco detention and wastage of fuel due to logistic loss.
SUMMARY OF THE INVENTION
In the present invention, an improve device for brake adjuster is constituted of two solid steel yoke bridged by a turn buckle in between them. Each steel yoke having a plurality of holes at both end and a inside threaded hole at the other end through which screw of turn buckle can move in forward and backward direction. The turn buckle is provided with two adjustable checknut at both sides and a fix nut at the centre. Screw is to be rotated clockwise or anti-clockwise and accordingly, adjustable device will be shortened and extended. The first end of the device is attached with Brake hanger connected with !the Brake cylinder by means of a steel pin through the hole. The second end of the device is fastened with the brake shoe through brake hanger by means of steel pin through the hole.

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The connector of the brake cylinder push the improved device forward direction which in turn hinder the rotation of wheel.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
Fig-1 shows the insomatric view of the [Tie-Rod in prior art.
Fig-2 shows the schematic diagram of isomatric view of the hole adjustable Tie-Rod in the present invention.
Fig-3 shows an elevation of the brake adjustable device according to present invention.
Fig-4 shows a plan of the brake adjustable device according to the present invention.
DETAIL DESCRIPTION OF THE EMBODIMENT OF THE INVENTION
1. An improved brake adjustable'devices comprising two identical steel yokes (2,3). Each steel yoke having a double arm (5,6) steel structure open at one end and both the arms (5,6) are rightly welded with a steel block (8) on the other end. First steel yoke (2) is provided with two holes (11,12) and two holes (11,12) in second

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steel yoke end (3). The two steel yokes (2,3) are connected by a
i screw turn buckle (4). The screw turn buckle (4) is provided with
two adjustable, sliding checknuts (14,15) at both end and one fixed hex nut (16) at the centre.
The first end (2) of the adjustable brake device is fastened with the Brake hanger connected to air brake cylinder by means of locking pin (17) and the second pin end (3) of the adjustable brake device is fastened with the brake shoes holder (21) through brake hanger by means of a locking pin (18). The rotation of screw turn buckle (4) is exercised by means of a spanner or sliding wrench.
By rotating the screw (4) clockwise or anticlockwise, the adjustable device is shortened or extended and screw fastened with the steel parts (2,3) are locked by check nuts (15 orl4).

7 KEY FEATURES

Reference Character Feature Figure
1 Adjustable brake device 2,3,4
2 First steel part end 2,3,4
3 Second steel part end 2,3,4
4 5,6 Screw turn buckle Double arm 2,3,4 3
7 Open end between thearm 3
8 Steel block connectedwith double arm 3
9 Half round shape of oneend of steel yoke 3,4
10 Vertical plane surface of second end of steel yoke I 3,4
11, 12 Two holes in steel yoke 3,4
13 Inside threaded holes 3,4

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15 Check nut of screw t of first end urn buckle 3,4
16 Fix nut at t screw tu centre of n buckle 3,4
17 Steel pin c yo first steel ke 3,4
18 Steel pin steel of second yoke 3,4
19 First end of but screw turn kle 3,4
20 Second en turn t of screw uckle 3,4
21 Brake sh e holder 2
22 Brake shoe 2
21 Where eel 2

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WE CLAIM
1. An improved brake adjustable device (1) adoptable to railway locomotive comprising:
- two identical yoke disposed at (2,3) which are connectable by a screw
turn buckle (4) having two check nuts (14,15) and a fixed nut (16);
- both identical parts (2,3) has a double arm structure opened at one
end (7) and both the arms are rigidly connected with a metal block at
other end (8);
- the first end of each parts (2,3) is configured with a half round shape
(9) and the second end is configured with a vertical plane surface
(10), arm;
- each parts (2,3) is provided with two through and through holes
(11,12) near the half round end (9) and an inside threaded hole (13)
on the plane surface end (8) through which one end of the screw
turn buckle (4) is fastened;

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2. The device as claimed in claim 1 wherein first part (2) Is fastened
with brake hanger connected with brake cylinder by a steel pin (17)
through and hole (11) the second steel part (3) is connected with the
brake shoes holder through brake hanger (21) by a steel pin (18)
through hole(l).
3. The device as claimed in claim 1 wherein first end of screw turn
buckle (19) enter in first yokei(2) and second end of the screw turn
buckle (20) enter into the second steel yoke (3) simultaneously by
rotating the screw turn buckle (4)
4. The device as claimed in claim 1 wherein a sliding checknut (15) of
turn buckle locks the screw (4)| after fastening with the first yoke end
(2) and a sliding checknut (14) of turn buckle locks the screw (4)
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after fastening with the second yoke end (3).
5. The device as claimed in claim 1 wherein the rotation of screw (4) is
exercised from the fixed nut (16) by means of a spanner or sliding
wrench.
6. The device as claimed in claim 1 wherein the clockwise or
anticlockwise rotation of screw (4) will decease or increase the
length of the device.

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7. The device as claimed in claim 1, wherein both identical yoke (2,3) is
constituted by fabrication of steel material.
8. An improved brake-adjustable device adoptable to railway locomotive
as substantially described and illustrated herein with reference to
accompanying drawings.