CA1340060C

CA1340060C - Marking device

Info

Publication number: CA1340060C
Application number: CA000598175A
Authority: CA
Inventors: Lars Skarin
Original assignee: Partex Marking Systems AB
Current assignee: Partex Marking Systems AB
Priority date: 1988-05-03
Filing date: 1989-04-28
Publication date: 1998-09-29
Anticipated expiration: 2015-09-29
Also published as: DE68907211D1; DE68907211T2; SE8801671L; FI101838B1; SE461065B; WO1989011153A1; EP0413744A1; DK263590D0; FI101838B; FI905424A0; MY103713A; DK165034B; AU3565389A; DK263590A; SE8801671D0; DK165034C; EP0413744B1

Abstract

The invention relates to a device for marking electric wires or the like and presents a solution of the problem of making it possible to use one and the same marker alternatively for permanent or temporary mounting. In the first case the marker is threaded over the wire in the direction of the longitudinal axis of the wire, whereas in the latter case it is mounted by a displacement in the radial direction of the wire and retained by a snapping action. The marker which consists of an elastic plastic material comprises an outer portion shaped like an inverted U and an inner portion having two lateral legs. According to the invention the space for receiving a wire on which the marker is permanently mounted is defined between said inner and said outer portion whereas a space for receiving a wire on which the marker is temporarily mounted is defined between the legs of the inner portion.

Description

1 3 ~

A marking device The present invention relates to a device for marking electric wires or the like which device consists of an integral unit, preferably manufactured by extrusion of an elastic plastic material. When not mounted on a wire the device exhibits in cross-section an outer portion shaped like a reversed ~,or a semi-circle,the ends of which merge with an inner portion having two 1C lateral legs and a central portion, said legs defining ~etween themselves and said outer portion a space for receiving the wire by axial insertion thereof, whereby the device is securely retained on the wire.

1~ Since several decades the prior art has comprised two main tvpes of such marking devices, namel~ or the one hand devices similar to a sleeve or a rina tc be axially threaded over a free end of the wire and, on the other, devices which are mounted on the wire by a 2~ radial movement and retained thereon b~ a snz?ping action. In other words, in their mounted concition, marking devices of the first type cannot ~e ~ninten-tionally lost whereas this does rather of~en occur in respect of devices of the latter type, e. a. c-1e to 2. vibrations or unintentional displacement. For that reason, devices of the latter type are generally used only when the wires are to be identified temp~rarily, for example in the context of modification or repair ~orks being carried out in an existing apparatus.

3~ ~.arkers of the first type are used in such irstalla-tions where loss of the markers cannot be accepted resulting in the identification picture getting incomplete or erroneous.

3~ ~owever, in certain cases there exists a r.eec, simul-*

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taneously or during different phases of a mountingwork, of having access to both of the two marking alternatives mentioned above, the permanent as well as the temporary one. The object of the invention is to provide a marker satisfying this condition in the way that one and the same device may optionally be mounted permanently or be retained temporarily by a snapping action. According to the invention this has been realized in the way that said central portion of the device is elastically deformable so that a wire can be radially moved into the space between the legs after which said portion does substantially completely surround the wire, retaining the marker by a snapping action.

rn accordance with one aspect of the invention there is provided a device for marking wires manufactured as an integral piece of an elastic plastic material, said device, in its unmounted condition, having a cross-section comprising an outer portion in the shape of an inverted U or a semi-circle, the ends of which merge into an inner portion having two lateral legs and a central part and, between the inner portion and the outer portion, defining a space for receiving the wire on which the device is then protected from unintentional dismounting by being pushed onto the wire in the direction of the longitudinal axis of the wire to thereby completely surround the wire; and wherein, for the purpose of providing an alternative mounting of the device on the wire, by the wire radially entering the space between said legs, said central part being elasti-cally deformable, whereby, in its alternatively mounted position, the device is, by a snapping action, retained on the wire and the central part surrounds a major portion of the circumference of the wire.

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2a 13 4~Q ~o One embodiment of the invention will now be described with reference to the drawing.

Fig. 1 is a perspective view of a marker designed according to the present invention and shown in its 5 unmounted condition.

Fig. 2 shows the device mounted on a wire in a permanent way.

Fig. 3 shows the same marker mounted on a wire and retained by a snapping action.

10 A device according to the illustrated embodiment may, in a manner known per se, be manufactured by extrusion of an elastic plastic material to a long hose which is subsequently by transverse cutting operations divided into individual markers. Each such marking device has 15 two main portions, namely an outer portion 1 roughly shaped like an inverted U, the central part of which comprising a marking symbol 2 on its outer wall, and ~ )ti~

an inner portion 3. The last mentioned portion has two lateral legs 4, 5 and an intermediate bellows-shaped part 6. Between that part and the outer portion 1 there is defined a space which may receive a wire 7 in the way that the marker is in an axial direction threaded over the wire as illustrated in Fig. 2.
According to Fig. 2 the device is mounted on a rela-tively small guage wire implying that substantially only the bellows-shaped part 6 has been deformed.
However, according to the same principle, continued deformation of all of the marker permits its use also on significantly thicker wires. As is understood, according to this mounting alternative the marker is, in a manner known per se, retained on the wire so that it cannot be unintentionally removed.

Fig. 1 does also show that another space is defined between legs 4 and 5, which space in contrast to the one mentioned above is not omnilaterally closed but open at its bottom. This configuration makes it possible alternatively to mount the marker on a wire 8, as shown in Fig. 3, by forcing the marker onto the wire in a radial direction. It is likewise apparent that, due to its configuration and the elasticity of the plastic material, the marker is in this case retained by a snapping action, i.e. there is no protection against unintentional loss. However, the retaining action can be amplified if legs 4 and 5 are provided with shoulder-like protrusions 9 adjacent their junctions with the outer portion 1.

In the practical application of the invention the device may substantially deviate from the embodiment here shown as far as its general shape and internal proportions are concerned. The only essential feature of the inventive idea is that the inner portion of 13 10d~0 the marker does, in the unmounted condition, define two spaces one of which is omnilaterally closed whereas the other one is not. As explained above, the first mentioned space is arranged to receive a wire by an axial threading movement resulting in the marker getting mounted in a way protecting it against unintentional loss. The outer space is defined between the legs of the inner portion and, due to the presence of the bottom opening, it can receive a wire mounted by a radially inwards directed movement to a position where the marker is retained by a snapping action.

Claims

1. A device for marking wires manufactured as an integral piece of an elastic plastic material, said device, in its unmounted condition, having a cross-section comprising an outer portion in the shape of an inverted U or a semi-circle, the ends of which merge into an inner portion having two lateral legs and a central part and, between the inner portion and the outer portion, defining a space for receiving the wire on which the device is then protected from unintentional dismounting by being pushed onto the wire in the direction of the longitudinal axis of the wire to thereby completely surround the wire; and wherein, for the purpose of providing an alternative mounting of the device on the wire, by the wire radially entering the space between said legs, said central part being elastically deformable, whereby, in its alternatively mounted position, the device is, by a snapping action, retained on the wire and the central part surrounds a major portion of the circumference of the wire.

2. The device of claim 1, wherein said device is manufactured as an extrusion.

3. The device of claim 1 or 2, wherein said central part of the inner portion is shaped like a bellows for the purpose of permitting use of the marking device on wires of mutually different diameters.

4. The device of claim 1 or 2, wherein said legs, adjacent their junctions with said outer portion, exhibit exposed projections which increase the snapping action retaining the device on the wire.