Field of the Invention
The present Invention relates to Cable Gripper for Bailey Type Suspension Bridge and more particularly safe gripping and locking arrangement for Ø24mm Steel Wire Rope (SWR) under tension, used in Bailey Type GRSE Suspension Bridge as Main-Cable by using a Cable Gripping System having tapered bore to grip the passing cable tightly & firmly and a lever to securely lock the system within very short period of time with minimum manual effort and without any tool.
Background of the invention
The present invention relates to construction of Bailey Type GRSE Suspension Bridge of unique design, using 'cable gripping system' deployed for end anchorage of cables. The entire load of the bridge is transferred to the cables (SWR; Steel Wire Rope), which are pegged at both ends of bridge.
This 'cable gripping system' is used to hold the cables at both ends, which ensures its proper anchorage, since any failure in gripping the cables will result in slippage of cables from the system and thereby causing collapse of the bridge at once. Hence the reliability of the system is of utmost important, since it deals with the major safety of the bridge.
Since inception, a specific type of 'cable gripping system' was imported by M/s. GRSE from a foreign based firm, which has went into liquidation and as such, the supply was jeopardised.
Moreover, Bailey Type GRSE Suspension Bridge were designed and fabricated with timber decks only, which also necessitated replacement mainly due to following reasons:

i) High cost of well-seasoned timber and their increasing scarcity;
ii) Proneness to pilferage;
iii) Governmental ban on use of timber to prevent deforestation; and
iv) Possibility of fire hazard, particularly during dry months.
To overcome the above said situation, M/s. GRSE invented (also patented) 'Stiffened Steel Deck' to replace the wooden decking. But the weight of this steel decking is higher than wooden decking and thus Dead Load of the bridge also increased which in turn distributed to each anchorage through 'cable gripping system'. But the 'imported cable gripping system' was designed for loading with wooden decking and thus became unsafe for Steel Decking.
Hence with an intension to reduce the dependency on import, to reduce cost and to develop an Indigenise substitution of 'Imported cable gripping system' with higher load carrying capacity and easy tool-less operation, presently need is felt for designing and developing 'Cable Gripper for Bailey Type Suspension Bridge'.
Objective of the invention
The main objective of present invention is to develop an improved gripper which is suitable to sustain higher pull out force on cable and offers rigid grips without any slippage under long term performance.
Further objective of the invention is to develop a cable gripping system with special lever, which will remain in self-locking condition under load.
Further objective of the invention is to develop a cable gripping system in which inner grabbing surface will not wear out due to friction with cable wires against fluctuating axial pull out force.

Further objective of the invention is to develop a cable gripping system which will also useful for pulling, positioning and providing for strain relief of cable under dynamic load on bridge.
Further objective of the invention is to develop a cable gripping system which is simple in manufacturing and easy in assembly with less number of sub-parts.
Further objective of the invention is to develop a cable gripping system which is cost effective.
Summary of the Invention
In order to solve the above mentioned problems, it is an objective of the present invention to make the present invention stronger, safer, more economic and easy to manufacture by using local resources. Thus the present invention which achieves the desire needs related to a "CABLE GRIPPER FOR BAILEY TYPE SUSPENSION BRIDGE" has two main parts, i) 'Gripper Body' & ii) 'Clamping Wedge'. The 'Gripper Body' has semi circular groove, facing inner way at its both sides. It also consists of a centrally guided 'Rod', locked at one end over 'Gripper Body'. The inner bed of 'Gripper Body' has two angled guided slots over which the other part named 'Clamping wedge' may slides. The 'Clamping Wedge' remain attached to the 'Gripper Body' by means of the 'Centre Rod', locked at other end with 'Clamping Wedge'. The 'Clamping Wedge also has semi circular groove at its both end facing outer way. 'Lever 1' is pivoted to the 'Clamping Wedge' and act as a locking/unlocking handle. One another 'Lever 2' remain attached with the 'Lever 1' and 'Clamping Wedge' in such a way that when the 'Lever 1' rotate clockwise, the 'Lever 2' force the 'Clamping Wedge' to slide outward over 'Gripper Body' and make a wider-opening for easy access of Cable through the cylindrical bore.

The Cable is then inserted through one end of opening of cylindrical bore made by opposite directional semi circular groove of 'Gripper Body' and 'Clamping Wedge' and exited through another end. The 'Lever 1' is then rotate anti-clockwise and the 'Clamping Wedge' is thus slide back to its original position. The sliding slots are cut over 'Gripper Body' in such a way that the semi cylindrical groove of 'Clamping Wedge' makes a taper cylindrical bore with the semi cylindrical groove of 'Gripper Body' and thus press over the passing cable with full strength and securely grip the cable without any slippage. Due to this tapered bore, higher the load on cable, higher the gripping strength of system and at the same time due to load, the locking/ unlocking 'Liver 1' get auto-lock in position and thus stop the 'Clamping Wedge' to slide outward.
In order to attach this gripping arrangement with the anchorage, one another arrangement is attached with the 'Gripper Body', which consists of i) Hanger, ii) Cable locking Key, iii) Rope Guard and iv) Ø24mm Loop Cable. Here the 'Hanger' is a semi circular metal block having semi circular groove cut on outer edge and a through hole at centre. The ' Ø24mm Loop Cable' passes round the 'Hanger' and locked with 'Gripping Body' by 'Cable Locking Key'. The 'Ø24mm Loop Cable' is enfolded round the 'Hanger' and remains in position by two 'Rope Guards'. The hole at centre of 'Hanger' is used to attach this whole cable gripping/ locking arrangement with bridge anchorage by means of a Pin, which is secured by a split pin.
Brief Description of the Drawings
A better understanding of the features, objectives and advantages of the present invention will be obtained by reference to the following drawings for the purpose of illustrating embodiment of the invention only.

Fig. 1 Shows General Arrangement of 'Cable Gripper for Bailey Type Suspension Bridge', in accordance to the exemplary embodiment of the present invention.
Fig.2 Shows schematic view of the Item No. 1 i.e. 'Gripper Body', in accordance to the exemplary embodiment of the present invention.
Fig.3 Shows schematic view of the Item No.2 i.e. 'Clamping Wedge', in accordance to the exemplary embodiment of the present invention.
Fig.4 Shows schematic view of the Item No.3 i.e. 'Lever-1' and Item No.4 i.e. 'Lever-2', in accordance to the exemplary embodiment of the present invention.
Fig.5 Shows schematic view of the Item No.5 i.e. 'Cable Locking Key', Item No.6 i.e. 'Rope Guard' and Item No.7 i.e. 'Hanger', in accordance to the exemplary embodiment of the present invention.
Fig.6 Shows General layout of 'Bailey Type GRSE Suspension Bridge', in accordance to the exemplary embodiment of the present invention
Fig. 7 Shows General layout of Tower' used in 'Bailey Type GRSE Suspension Bridge', in accordance to the exemplary embodiment of the present invention.
Detail Description
The present invention is explained in detail below. This description is not intended to be a detailed catalogue of all the different ways in which the invention may be implemented, or all the features that may be added to the instant invention. For example, features illustrated

with respect to one embodiment may be incorporated into other embodiments, and features illustrated with respect to a particular embodiment may be deleted from that embodiment. In addition, numerous variations and additions to the various embodiments suggested herein will be apparent to those skilled in the art in light of the instant disclosure, which do not depart from the instant invention. Hence, the following specification is intended to illustrate some particular embodiments of the invention, and not to exhaustively specify all permutations, combinations and variations thereof.
The above objective of the present invention will become more apparent by describing in detail-preferred embodiments thereof with reference to attached drawings.
Referring to Fig. 1, general arrangement of'Cable Gripper for Bailey Type Suspension Bridge' is shown and referring to Fig.2 to 5, the components of' Cable Gripper for Bailey Type Suspension Bridge' are shown. The 'Gripper Body (Item: 1; Fig. 2)' has semi circular groove, facing inner way at its both side. On the other hand the 'Clamping Wedge (Item: 2; Fig.3)' also have semi circular groove at its both end facing outer way. The inner bed of 'Gripper Body (Item: 1; Fig. 2)'has two angle- guided slots (Fig.2) over which the 'Clamping wedge (Item: 2; Fig.3)' may slides. Thus when the 'Clamping Wedge (Item: 2; Fig.3)' is attached with the 'Gripper Body (Item: 1; Fig. 2)', a cylindrical bore/ pathway is generated to accommodate the passing Cable. The angle of the guided slot makes this cylindrical pathway conical, having minor diameter at opening i.e. towards entry and exit point of Cable. 'Lever 1 (Item: 3; Fig.4)' is pivoted to the 'Clamping Wedge (Item: 2; Fig.3)' and act as a locking/unlocking handle. One another 'Lever 2 (Item: 4; Fig.4)' remain attached to the 'Lever l(Item: 4; Fig.4)'and 'Clamping Wedge (Item: 2; Fig. 3)'in such a way that when the 'Lever ljltem: 3; Fig.4)'rotate clockwise, the 'Lever 2 (Item: 4; Fig.4)'force the 'Clamping Wedge' to slide outward over 'Gripper Bodyjltem: 1; Fig.2)' and makes the opening of the cylindrical pathway wider to easy access of the Cable. The 'Clamping Wedge (Item: 2; Fig.3)'

is attached to the 'Gripper Body (Item: 1; Fig.2)' by means of a centrally guided 'Centre Rod (Item: 11; Fig. 1)', locked at one end with the 'Gripper Body (Item: 1; Fig. 2)' and other end with 'Clamping Wedge (Item: 2; Fig.3)'.The setting of this 'Centre Rod' also restrict the outward movement of 'Clamping Wedge (Item: 2; Fig.3)' and thus during clockwise rotation of'Liver-1 (Item: 3; Fig.4)', the 'Clamping Wedge (Item: 2; Fig.3) can never move outward beyond few millimetres.
When the Cable is required to be griped, first the 'Lever 1 (Item: 3; Fig.4)' is rotated clockwise and thus the 'Clamping Wedge (Item: 2; Fig.3)' slides outward and makes a wider opening. The Cable is then inserted through one end of opening of cylindrical pathway made by 'Gripper Body (Item: 1; Fig.2)' and 'Clamping Wedge (Item: 2; Fig.3)' and exited through another end opening. The 'Lever 1 (Item: 3; Fig.4)' is then rotate anti-clockwise and the 'Clamping Wedge (Item: 2; Fig.3)' is thus slide back to its original position. The sliding slots are cut over 'Gripper Body (Item: 1; Fig.2)' in such a way that the semi cylindrical groove of 'Clamping Wedge (Item: 2; Fig.3)' makes a taper cylindrical bore with the semi cylindrical groove of 'Gripper Body (Item: 1; Fig.2)' and thus press over the passing cable with full strength and securely grip the cable. Due to this tapered bore, higher the load on cable, higher the gripping strength of system and at the same time due to load, the locking/ unlocking 'Liver l (Item: 3; Fig.4)' get auto-lock in position and thus stop the 'Clamping Wedge (Item: 2; Fig.3)'to slide outward.
In order to attach this Gripping Arrangement with the bridge-anchorage, one another arrangement is attached with the 'Gripping Body (Item: 1; Fig.2)', which consists of i) Hanger (Item: 7; Fig.5), ii) Cable locking Key (Item: 5; Fig.5), iii) Rope Guard (Item: 6; Fig. 5) and iv) 024mm Loop Cable (Item: 8; Fig. 1). Here the 'Hanger (Item: 7; Fig.5)' is a semi circular metal block having semi circular groove cut on outer edge and a through hole at centre (Fig.5). The '024mm Loop Cable (Item: 8; Fig. 1)'passes round the 'Hanger (Item: 7; Fig. 1 &

5)', guided by two 'Rope Guards (Item: 6; Fig. 1 & 5)' and locked with 'Gripping Body (Item: 1; Fig. 1 & 2)' by 'Cable Locking Key (Item: 5; Fig.l & 5)'. This whole cable gripping/ locking arrangement (Fig. 1) is locked with the bridge-anchorage by inserting a 'Pin' in the hole at the centre of 'Hanger (Item: 7; Fig. 5)', secured by a split pin.
Referring to Fig.6, the foregoing objects are achieved by the present invention which provides a single lane Bailey Type GRSE Suspension Bridge from 61 Meters to 122 Meters span, having four sub-groups of parts namely -
a) Span Parts, which comprises -
1. 'Panel' with 'Panel Pin', 'Split Pin' and 'Sway Braces'.
2. 'Chord Reinforcement' with 'Chord Bolt' and 'Short Chord Bolt'.
3. Transom' equipped with Transom Clamp' and 'Raker'.
4. Said Transom' in turn carrying 'Stringers', which may be 'Plain' and/ or of 'Button' type with 'Stringer Clamp'.
5. Said 'Stringer' in turn carrying Vooden Chess' or 'Stiffened Steel Deck' with 'Curb Angle' and 'Modified Riband Bolt'.
6. 'Sliding Bearing Base' with 'Male Sliding Bearing' and 'Female Sliding Bearing'.
7. Top Suspender Clamp' with 'Female Connector Link', 'Rod Suspenders', 'SWR Suspenders', 'Bottom Suspender Connector', 'Male Connector Link', 'Screwed Adjustor' and '11/4 dia. pin'.
b) Cable Parts, which comprises -
Twelve nos. Ø24 mm Steel Wire Ropes (SWR) are used as Main Cables in Bailey Type GRSE Suspension Bridges, Six on each side of the bridge in horizontal layer.

c) Tower Parts (Ref. Fig. 7), which comprises -
1. Tower Base' with 'Lewis Bolt', Tower Bottom Bearing' and 'Tower Top Bearing'.
2. 'Bracing Frame' which may be 'Std.', 'Heavy' and 'Light' with 'Bracing Angle' and 'Bracing Bolt'.
3. 'Portal Raker Attachment' which may be 'Top', 'Centre' and 'Bottom'.
4. 'Portal Connector Frame' which may be 'Male' and 'Female'.
5. 'Saddle Bearer' with 'Saddle'.
d) Anchorage Parts, which comprises -
'Rock Anchorage' connected to 'Concrete Block', 'Female Connector Link', 'Screwed Adjustor', '11/4 dia. Pin' and the invented component i.e. "CABLE GRIPPER FOR BAILEY TYPE SUSPENSION BRIDGE".
Referring to Fig. 1, the weights and dimensions of components for "CABLE GRIPPER FOR BAILEY TYPE SUSPENSION BRIDGE" including item number may be summarised as follows:

Item No. Item Weight in Kg. Dimensions in mm.
01. GripperBody 16.70 353 x 348 x 92.5 Thk.
02. Clamping Wedge 5.30 387 x 250 x 35.0 Thk.
03. Lever -1 0.20 290 x 65x16.0 Dia.
04. Lever - 2 0.15 170 x 61x10.0 Thk.
05. Cable Locking Key 0.25 60x29.4x24.0 Thk.
06. Rope Guard 0.04 45 x 25x15.0 Thk.
07. Hanger 1.90 120x110x40.0 Thk.
08. 025 Loop Cable 5.30 1100 length x 25 Dia.
09. M12 Stud Pin 0.10 50 length x 12 Dia.
10. Rivet Pin 0.10 30 length x 10 Dia.
11. Centre Rod 1.13 319 length x 12 Dia.

Although the foregoing description of the present invention has been shown and described with reference to particular embodiments and applications thereof, it has been presented for purposes of illustration and description and is not intended to be exhaustive or to limit the invention to the particular embodiments and applications disclosed. It will be apparent to those having ordinary skill in the art that a number of changes, modifications, variations, or alterations to the invention as described herein may be made, none of which depart from the spirit or scope of the present invention. The particular embodiments and applications were chosen and described to provide the best illustration of the principles of the invention and its practical application to thereby enable one of ordinary skill in the art to utilize the invention in various embodiments and with various modifications as are suited to the particular use contemplated. All such changes, modifications, variations, and alterations should therefore be seen as being within the scope of the present invention as determined by the appended claims when interpreted in accordance with the breadth to which they are fairly, legally, and equitably entitled.

We Claim:
1. A cable gripper for bailey type suspension bridge comprising of -
a gripper body including a semi circular groove, facing the inner way at its both sides, a centrally guided rod, and an inner bed including two angled guided slots;
a clamping wedge attached with the said gripper body by means of the said centrally guided rod, locked at other end with the said clamping wedge, which also has semi circular groove at its both end facing outer way;
a lever 1 pivoted to the said clamping wedge configured for a locking/unlocking handle; and
a lever 2 which remains attached with the said lever 1 and clamping wedge in such a way that when the lever 1' rotate clockwise, the lever 2' force the 'clamping wedge' to slide outward over 'gripper body' and make a wider-opening for easy access of cable through the cylindrical bore.
2. The cable gripper as claimed in Claim 1, wherein the said centrally guided rod is locked at one end over the said gripper body.
3. The cable gripper as claimed in Claim 1, wherein the said inner bed of said gripper body has two angled guided slots over which the said clamping wedge may slide.

4. The cable gripper as claimed in Claim 1, wherein during use, the cable is inserted through one end of opening of cylindrical bore made by opposite directional said semi circular grooves of said 'gripper body' and 'clamping wedge' and exited through another end.
5. The cable gripper as claimed in any of the preceding Claims, wherein during use, after the insertion of the said cable, the said lever 2 is rotated anti-clockwise and the said clamping wedge is slided back to its original position.
6. The cable gripper as claimed in Claim 3, wherein the said sliding slots are cut over the gripper body in such a way that the semi circular groove of said clamping wedge makes a taper cylindrical bore with the semi circular groove of 'gripper body' and thus press over the passing cable with full strength and securely grip the cable without any slippage.
7. The cable gripper as claimed in any of the preceding Claims, wherein the tapered bore is configured for handling higher loads and on application of such higher load on cable, the gripping strength of cable gripper is maximum and at the same time due to load, the locking/ unlocking 'lever 1' get auto-lock in position and thus stop the 'clamping wedge' to slide outward.
8. The cable gripper as claimed in Claim 1, wherein the said gripper body further includes:
a hanger, which is a semi circular metal block having semi circular groove cut on outer edge and a through hole at centre;

a cable locking key configured for locking the cable;
a rope guard and
a Ø24mm loop cable; wherein the said 'hanger', 'Ø24mm loop cable' passes round the 'hanger' and lock with said 'gripping body' by said cable locking key'.
9. The cable gripper as claimed in Claim 1, wherein the said Ø24mm Loop Cable is enfolded round the 'Hanger' and remain in position by two 'Rope Guards'.
10. The cable gripper as claimed in Claim 1, wherein the said 'Hanger' includes a hole at centre and is configured to attach this whole cable gripping/locking arrangement with bridge anchorage by means of a pin, and further secured by a split pin.
11. The cable gripper as claimed in Claim 1, wherein the 'Screwed Adjuster' remain attach to the concrete block with Female connect or link and 'Rock Anchorage' and the other end remain attached with cable gripper for Bailey type suspension bridge which grip and lock the Main Cable of the bridge.
12. A Bailey Type GRSE suspension bridge of standard width with cable gripper as claimed in any of the preceding claims wherein the Gripper Body (1) consists of ribs, surrounded over outer surface to resist the thrust on inner grooves.
13. A Bailey Type GRSE suspension bridge of standard width with cable gripper as claimed in any of the preceding claims wherein after opening the cable gripper by

rotating 'Lever 1', Cable is used to feed around the curved track and pulled easily until the required length is reached and finally locked against full load.
14. A Bailey Type GRSE suspension bridge of standard width with cable gripper as claimed in any of the preceding claims wherein the design strength of the assembly is higher than the strength of cable, it grips.
15. A Bailey Type GRSE suspension bridge of standard width with cable gripper as claimed in any of the preceding claims wherein the Cable Gripper is mainly made from improved cast steel and thus reduces corrosion and efficiently resists action of waste and chemicals, apart from offering registance to wear and tear.
16. A Bailey Type GRSE Suspension Bridge of standard width with said cable gripper as claimed in any of the preceding Claims.