US1737314A - Channel-forming apparatus for telephone and the like cables - Google Patents

Description

Nov. 26, 1929. J. A. KIRBY CHANNEL FORMING APPARATUS FOR TELEPfiONE AND THE LIKE CABLES Filed July 1, 1926 35 FILLS.

Fla-tented Nov. 26, 1929 JOSEPH ANNING KIR BY, F WYNDHAM, SOUTHLAND, NEW ZEALAND CHANNEL-FORMING ArPAnATcs FOR- TELEPHONE AND THE LIKE GABLES Application filed July 1, 1926. Serial 1%. 119,964..

applied to the front carriage of the apparatus shown in Figures 1 and 2.

Figure 4 is a side elevation showing a slight modification of the centre plate and centre plate beam shown in Figure 1, a portion of the length of the plate bar having been cut away.

Figure 5 is a plan View of Figure 4.

There is what might be termed a centre plate 1, fashioned to form a fissure or nar- I 5 row breach, the said plate having preferably three sides, designated the base 2, which is the bottom of the plate, and which forms the bed in the fissure for themetal duct or cable 3, an entering edge 4 of which projects forward and enters the ground to clear a channel for the metal duct or cable 3, and atrailing edge 5 which projects rearwards of the apparatus to deposit the metal duct or cable 3 in the bottom of the channel. Inan alternative design, the centre plate 1 is com posed of two members 1A and 1B adapted to be separately constructed and hinged together as at 6, for the purpose of facilitating laying operations on bends and sharp turns. The hinge 6 is inclined so that when the apparatus makes a turn, the rear lower point of the rear part will tend to lift out of the ground and greatly reduce the friction with the earth, thereby facilitating the turning movement.

The base 2 is fitted with a renewable shoe 7, suitably constructed to form a channel for the metal duct or cable 3. The entering edge 4 is necessarily sharp, the plate increasing in width towards the trailing edge 5 and being constructed preferably of sheet metal reinforced with a suitable hardwood packing, such as blue gum, a space between the sheet metal being formed; the said space increasing. in width from the broken indication line L.

at 8 to the trailing edge 5 providing a passage for the metal duct or cable 3 during the operation of laying.

In order to reduce to a minimum frictional resistance, when laying cable, caused by the metal duct 3 sliding within the casing at the trailing edge 5, a small roller 9 .is disposed -within the said casing at a point near its lower extremity.

There is a centre plate dragging beam, which may comprise a sheet metal plate sheathing member 10 for housing a suitable hard timber reinforcement 11, which is in length preferably less than the metal plate sheathing member 10. The whole is suitably braced by. bolts or rivets 12 and the said centre plate member 1 is made secure at one end by similar means. The opposite end 13 of the said centre plate beam is provided with suitable straps 13A for attaching it to the fore carriage'of the apparatus. V

There is achassis 14 constructed preferably from channel and angle iron, suitably braced with wooden beams and flooring. There is what might be conveniently termed a fore and rear carriage, the fore carriage consisting'of two su1tably' dimensioned road wheels 15 mounted on an axle 16 braced by efficient bolsters and straps 17 and 18 respectively, and

adapted to pivot freely on the chassis 14 as pivotally at 18 to provide forsteering. A threaded screw 19 is adapted to fit a corresponding internally threaded hole19A fashioned in the centre plate beam straps 13A, the top end of the said screw being checked to ,a smaller diameter as indicated by the broken linesat 20', and is adapted to fit the vertical bearing bracket 20A secured by bolts to the'front end of the chassis 14, the said screwis rendered operable by means of the handwheel 21, the lower end of the said threadedscrew being checked to a smaller diameter, where it is in engagement with the top surface of the bracket 22 secured to the bottom bolster 1'7 toraise and lower the centre plate 1 as as: described above.

required. There are suitable means provided for coupling the apparatus to a tractor, this consti uting a V shaped bar member 23, secured at its free ends 24 to the bottom bolster 17 by means of the straps 25. Two shackles are connected together by means of the bar 27, one shackle being pivotally mounted on the straps 13A, whilethe other is mounted at the end of a slotted plate 28. A bolt 29 is adapted to support the V shaped member 23 at its centre portion, the said bolt passing th rough the slot in the said slotted plate member 28 to tl c .lidable therein.

lhe rear carriagecomprises two road wheels 30 of larger diameter than those of the fore carriage, the wheelface being preferably wider in this case. The said wheels 30 are mounted on an axle 31 secured suitably to the chassis 14 at a point near the opposits end thereof.

There is a strong metal frame 82 mounted on the chassis frame 1 1, and a worm wheel men red on the top thereof to rotate with a vertical axis. There is a threaded spmdle 34, having at its topmost extremity a hearing bracket 35. A hand wheel 36 is mounted on'a horizontal spindle supported in brackets on the frame 32, and a worm keyed to the said spindle engages the worm wheel 33 to turn it on application of pressure to the hand wheel to raise and lower the threaded spindle 34. There are two such brackets, one mounted on each side of the chassis, and the bearing brackets 35 are adapted to receive 35 the aide 3 A. of the reel 38 on which is wound the metal duct 3. r i

In order to prevent chafing of the said metal duct or cable 3, while entering the up- )er end of the metal sheathing at the trails cable to be laid, an inclined hinge connection between the rear edge of the forward'part and thefront edge of the rear part, a shoe earned by each part and detachably connected thereto, said shoe being adaptedto form a passage in the ground below the upper surface thereof into which the cable passing through said channel is adapted to be laid, a ground engaging means for supporting the channel forming apparatus, and means whereby the channel forming apparatus may be adjusted relative to the ground engaging means ror var in the cuttin de 3th of such aaparatus.

' In testimony whereof, I have signed my name to this specification at Dunedin, New ldealand, this 23d day of April, 1926.

JOSEPH ANNING KIRBY.

ing edge 5, a guide block is introduced, and

may consist of two rope sheaves or rollers 39 mounted pivotally at an angle ad gacent each other; and secured either to the centre plate 101' the chassis 14.- to guide the metal duct or cable 3 while being unwound from the reel 38 when the apparatus is in operation.

'In. operation the said centre plate 1 is first sunk-into the ground at a depth at which it is desired to lay the cable, the maximum depth thereof being governed by the rear axle :31, the cable having previously been passed through the passage along the trailing edge cable. 3 is made fast bysuitable means, at the end where it emerges from the'said passage,

and the tractor started in the forward direction, theicable unwinding from the reel automat cally to be deposited in the channel formed by the centre plate 1; r

W hat'I claim as new and desire to secure by Letters Patent is:

comprising a channel forming member includzing two ndependent parts connected for hori- The free end of the.

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