LU81062A1 - IMPROVEMENTS ON INSTALLATIONS OF ELECTRIC CABLES OR LINES - Google Patents

Description

8 ,, -, BL-2599 / EM ,.

ΓΑ Γ lyRAND-DUCHÉ DE LUXEMBOURG

.........! ..... y ....... y Cm A, 19.3.1979 rfdHr * „. , at -............................................... ............. Minister

Title issued · from the National Economy and the Middle Classes __ Industrial Property Service

at] / 6 LUXEMBOURG

^ / Patent Application L Request - ·

Mr. Michel Ruidant, 15, rue de Fleurus, 6338Ligny "(SoïïKëfÎe) ^ ..... Belgium ............................ .................................................. .........................

represented by Messrs. E. Meyers and E.T.Preylinger, Ing.cons.en propr.ind. 4 6 / ruedti "Ciïïët'ÎIrëVLiïxëï ^ Z .......................................— - · £ ..... göij ^ te-ä ............

16.00 —'........ ”-------------------------------------- ---------------------------------------------------------- --------------------------- ® to ..................... ........... hours, at the Ministry of National Economy and the Middle Classes, in Luxembourg: 1. this request for obtaining a patent for invention concerning:

Improvements to electrical installations or lines (4) the depositor assumes responsibility for this declaration, that the inventor (s) is (are): —............— —— · ............................................... .............................................-.... .................................................. .................................................. ........... (5) .................................... .................................................. .................................................. lïïgnÿ ................................................. ............ 6v3 ', 1979 .............................

2. the delegation of power, added to ....................................... ................ the -................................ ......................................

3. description in language ..................... A ...................... ..................................... of the invention in two copies; 4 ................................. drawing boards, in two copies; 5. the receipt of the taxes paid to the Luxembourg Registration Office on March 15, one thousand nine hundred and seventy-nine

Claims for the above patent application the priority ^ of one (s) request (s) of (6) .......................... .................................................. .................... filed in (7) ...................... .................................................. .................................................. ..............

on ...................... L .......................... .................................................. .................................................. .................................................. .................................................. ................... (8) “in the name of L ....................... .................................................. .................................................. ..................................-............... .................................................. ...................... (9) elect domicile for him / her and, if appointed, for their proxy, in Luxembourg ....... .................................

46, rue au cemetery ............................................. .................................................. .................................................. ...................................... (10) seeks the grant of a invention for the subject described and represented in the appendices - 18 ♦ mentioned above, - with postponement of this issue to .......................... ......................month.

{J unydee mandataires ^ ErneS ^ Meyer ^ n Minutes of Filing

The above patent application has been filed with the Ministry of National Economy and the Middle Classes, Industrial Property Service in Luxembourg, dated: 19.3.1979

Pr. The Minister at 4 p.m. / National Economy and the Middle Classes, y ^ (f If (jf 'rit 4 ($ * (J drL · A 68007_y, ‘" fc' £ / _ / j / _

Descriptive memorandum filed in support of the patent application for: IMPROVEMENTS IN INSTALLATIONS OF ELECTRIC CABLES OR LINES

formed by

Michel RUIDANT at 6338 Ligny (Sombreffe).

The present invention relates to improvements made to cable or power line installations *

It is known that installations of electric cables in constructions involve the laying of a tube arranged in i a groove provided in the walls, the floor or the ceiling or simplement i simply placed on the floor before the screed is poured.

In some cases, a groove is made in a concrete wall in order to receive the tube. When the various tubes necessary for the electrical installation of the construction have been laid, * electrical cables are drawn in the tubes according to a pre-established plan, for connection to the switches, to the sockets; current, to junction boxes, to connection outputs of i \ j light points etc.

This procedure makes it necessary to have recourse to specialists 4 in order to draw the electric cables.

In addition, this operation is particularly long and complicated J '· *' '· Λ. ^ 'since to pull the cable, it is first necessary to introduce a paßee-wire in the tubes, and then to pull the cables.

When several cables must be pulled using the grommet in a tube, one sometimes encounters difficulties resulting from snagging, bends slowing the passage etc.

The present invention aims to simplify the installation of cables or power lines, in buildings, by avoiding. the disadvantages mentioned.

The principle on which the invention is based consists in the use of lengths of pre-wired tubes, that is to say in the use of tubes meeting regulatory standards in which one or more cables sheathed according to regulatory requirements have already been introduced.

Advantageously, the tube used is a flexible tube capable of being bent at angles of at least 90 ° in order to facilitate their installation.

The tube thus prewired is preferably sold wound and the user can easily install it with the cable it contains! and cut it to the length necessary to make connections. j

According to a particular embodiment of the invention, j • 1 the prewired tube is constituted by a so-called accordion tube, that is to say a flexible tube provided with grooves which make it possible to obtain sufficient flexibility for sufficient wall thickness · to provide adequate crush resistance.

As previously indicated, the tube and the cable it contains each meet the technical standards imposed - and therefore, their combination provides all guarantees of safety. The main advantage resulting from the present invention is that it avoids the difficulties of installation while allowing a / - = L fast and careful work. In particular, any difficulty is avoided „· # * - *‘ ifjl · '·' ·, resulting from cable pulling. The pre-wiring ‘of the cable which can be carried out in the workshop also ensures correct execution of the work. Indeed, often when the cables were drawn by the old procedures, we ran the risk in case of difficulty of damaging the cable without being aware of it, the damaged cable kept in the sheath can be the cause of danger after a while. According to the invention, the pre-wiring of the tube can be carried out in the workshop under optimal conditions, in particular with a tube arranged in a straight line guaranteeing ...

pulling the cable without damaging it.

The prewired tube according to the present invention can be embedded in concrete.

According to a particularly preferred embodiment of the present invention, however, use is made of a relatively flat tube of rectangular section adapted to receive pre-wiring. The relatively reduced thickness of the pre-wired tube allows it to be placed simply on the concrete and to be included in the plastering. In this way, it is not necessary to practice the usual grooves in the concrete which again facilitates the installation of the installations of cables or electric lines in the constructions.

According to a particularly advantageous embodiment of the invention, the prewired tubes are supplied as a function of the wiring plan and the quantity provided on the plan for a given dwelling. The tubes and cables they contain are delivered in adequate length according to the quantities and the plans pre-established with sufficient excess to allow staff, generally non-specialized staff, to lay and. release the cable by removing a part of the tube in order to make the necessary connections 4.

According to another form <3 ', the prewired tube is sold in lengths much greater than the individual tubes required, the laying staff cutting from a roll of prewired tube the individual lengths that will be required.

The invention also relates to various methods for carrying out the pre-wiring of tubes in the workshop.

To do this, a relatively large length, for example a length of 100 meters of tube, is extended over an adequate surface and the cable is fixed to a grommet.

According to a first variant, this grommet is magnetizable and is pulled by an electromagnet placed outside the tube and moving from one end to the other of the tube, driving the grommet and consequently the cable with him. According to a second embodiment, a thread puller is propelled into the tube by! compressed air.

The invention will be illustrated in more detail using a schematic representation of two embodiments of the prewired tube according to the invention and of two devices allowing the execution of the two process variants.

In Figure 1, there is shown a flexible tube of the "accordion type" into which a two-conductor cable is introduced.

In Figure 2, there is shown a sectional view of a rectangular cross-section tube suitable in particular for being embedded in a ceiling.

FIG. 3 schematically represents an embodiment of a magnetic device for drawing the cables in the tubes.

Referring to Figure 1, there is shown the tube H

1 of the "accordion" type through which a cable is passed 2. H

The assembly thus formed is sold in different lengths. H

In Figure 2, there is shown a tube of form B

rectangular in section 1 receiving a cable 2 with three strands B

conductors 3> 3 covered in the conventional way. B

For the practice of cable pulling in B

the tube, one can advantageously refer to Figure 3 · fl

In it, a tube 1 is deposited in the form of a length B

relatively large right. In the tube, we introduced fl

a cable puller 8 to which the B is conventionally attached

cable 2. An electromagnet device 9 is guided along the B

tube 1 and carries with it the grommet 8 to which the B is fixed

cable 2. I

The diagram of an installation allowing pre-fl

wiring of tubes by a pneumatic device is shown I

in figure * f. The cable to be prewired is laid out as shown fl

by reference 1. At the left end of the tube, an I is provided

device 10 for guiding and fixing the tubes. The tube 1 I

can of course be of variable length and only an I

part of it is shown in the figure. Tube I

can be for example a 3/8 or 3 / ^ inch PVC tube I

‘· Or can be an" accordion "tube of the Copek type as it is I

represented by variant 1 'in this figure. The end I

opposite the end 10 of the tube is provided with adapter cones I

interchangeable 11 for the selected dimensions of the tube, for example 3/8 of an inch or j / k of an inch. The pneumatic part is fl

constituted by a compressor 20 making it possible to reach by I

1 ",. ,, - j -

This tank is equipped with a safety valve 22, a pressure gauge 23 and a stop valve 24. The pressurized air leaving the tank passes through the stop valve 24, is dried with using a regulator filter set for example at 4 kg / cm. Then, the air flow is regulated by a solenoid valve 26 comprising a control 27 and is brought to the propellant device 30 by the intake manifold 31 - The connection cone 11 adapting to the device 30 allows the adaptation to tube 1 through which the electrical cable must be passed.

To do this, a nylon thread at the end of which is fixed a plume 42 resembling the tip of a brush is introduced into the part located to the right of the tube 1 and is propelled under the effect of the pressure of air from right to left, the wire 41 being unwound from a reel 43 until it reaches the left end of the tube by exiting through the guide 10. At this moment, we are in the position shown in FIG. h. During the propulsion of the wire by the pressurized air in the tube, the movement is assisted by a motor 45 provided with a clutch 46 which is itself controlled by a relay 47 and a motor control 4δ · When the plume 42 arrived at the left end of the tube, we attach the son to pull on a ring 49 attached to the plume. The different wires to be pulled 50, 51, 53 and possibly other wires which have been shown in dotted lines, 54, 55, 57, are unwound from cable reels 60 to 66 fixed on a common axis. Cable guide rollers such as 80 and 81 ensure correct cable positioning. After having fixed the number of strands of electric cables to the ring 49, the rotation of the motor 45 is reversed and with the help of the reel 43, the thread puller is brought back with the wires 50 to 57 which are there. attached to the inside of the tube. When the wire reaches the right end of this tube, a detector 70 stops the rotation of the motor. All that remains is to unhook the wires from ring 49 and start the operation again.

The essential characteristic and the decisive advantage of the pre-wiring of the cable is that it can be easily pulled into the tube, since the tube does not have any elbow. Indeed, the tube can be arranged in rectilinear length and not have bends, which facilitates the passage of the son.

The device of the invention also has the advantage of being able to be installed without resorting to secondary parts, such as elbows, fittings, etc., since a complete length of pre-wired tubes for a specific use can be provided according to measurements are cut on site.

It should be noted that many variants and modifications can be made to the invention while remaining within the framework and the spirit thereof. These variants and "modifications fall within the scope of the present invention which has not been described.

Claims (8)

1. Installations of cables or electric lines, intended in particular for constructions, characterized in that they consist of lengths of pre-wired tubes formed by tubes meeting regulatory standards in which one or more cables sheathed according to regulatory requirements i have been introduced prior to laying the tube. 2. Installations according to claim 1 characterized in that the tube used is a flexible tube capable of being bent at angles of at least 90 degrees. c J. Installations according to any one of claims 1 or 2 characterized in that the prewired tube is sold in rolled form. k. Installations according to any one of claims 1 to 3, characterized in that the pre-wired tube is constituted by a so-called "accordion" tube, that is to say a flexible tube provided with grooves making it possible to obtain sufficient flexibility for a thickness of walls ensuring a suitable resistance to crushing. 5 · Use of the installations according to any one of claims i to 4, characterized in that they are embedded in the concrete after their installation. 6. Use of the installations according to any one of claims 1 to 4, characterized in that they are of sufficiently reduced thickness to be included in the plastering. 7. Use according to any one of the resells! Cations 5 or 6 characterized in that the pre-wired tubes are supplied according to a wiring plan and measurements for a i - 9 -% 8. Use according to any one of claims 3 or 6 characterized in that the prewired tubes are cut on site by the personnel ensuring the installation. 9- Device for making pre-wired tubes k. according to any one of claims 1 to characterized in that the cable is pulled into the tube using a magnetizable grommet driven by an electromagnet disposed outside the tube. * \ 10. Device for producing pre-wired tubes according to any one of claims 1 to 4, characterized in that the cable is pulled into the tube using a grommet propelled by compressed air. ♦