GB2147463A

GB2147463A - Cable clamp

Info

Publication number: GB2147463A
Application number: GB08423516A
Authority: GB
Inventors: Niels Due Jensen; Peder Madsen; Carsten Mortensen
Original assignee: Grundfos AS
Current assignee: Grundfos AS
Priority date: 1983-09-29
Filing date: 1984-09-18
Publication date: 1985-05-09
Also published as: DK448183A; FR2552948B3; DK448183D0; IT1175716B; FR2552948A1; IT8422642A1; IT8422642A0; GB2147463B; DK154382C; DE3435239A1; DK154382B; GB8423516D0

Abstract

A cable clamp for electric lines or cables for instance in a plug is formed by a slider (1) with grooved surface portions (1a, 1b), said slider being insertable along a channel (4) with substantially corresponding grooved surface portions (4a, 4b) so as to engage said channel. The grooved surface portions (4a, 4b) of the channel may be laterally reversed relative to the grooved surface portions (1a, 1b) of the slider (1). The channel (4) is preferably open-topped to provide removal of the slider in a direction transverse to its insertion direction. <IMAGE>

Description

SPECIFICATION A draw-relieving nipple The invention relates to a draw-relieving nipple or cable clamp for electric lines or cables for instance in a plug and formed by a slider with grooved surface portions, said stider being insertable in a preferably horizontal channel with substantially corresponding grooved surface portions so as to engage said channel, whereby the grooved surface portions of the channel are optionally laterally reversed relative to the grooved surface portions of the slider.

U.S. Patent Specification No. 1,542,421 discloses a draw-relieving nipple whereby the grooved surface portions are parallel to the electric line, cf. Fig. 1. A draw-back of this nipple is that it can be displaced when the line or cable is pulled.

Attempts have been made in Norwegian published Specification No. B 1 38,679 to solve this problem by providing a pocket 4 implying that the draw-relieving nipple cannot be displaced in the longitudinal direction. This pocket is, however, encumbered with the draw-back that the draw-relieving nipple cannot be removed when the electric line is to be demounted.

According to the invention the grooved surface portions are positioned substantially perpendicular to the electric line.

In this manner the draw-relieving nipple is not displaced when the line is pulled, and the draw-relieving nipple is easily removable by displacing the nipple transversely to the line when said line is to be dismounted.

In another aspect the invention provides a device comprising a cable clamp, the clamp comprising two opposed substantially parallel surfaces extending in a first direction, an abutment surface facing and spaced in the first direction from one end of the said two opposed surfaces, cable to be clamped being placed between the abutment surface and that one end of the said two opposed surfaces to extend in a second direction cross wise of the first direction, and a plug adapted to be displaced in the first direction between the said two opposed surfaces and towards the abutment surface in order to clamp cable between the leading end of the plug and the abutment surface, the said two opposed surfaces and surfaces of the plug having cooperating recesses and projections for engaging with one another to resist movement of the plug in the first direction, wherein the recesses and projections are elongate and extend cross wise of the first and second directions.

In a further aspect the invention provides a cable clamp in which a plug is movable between two walls towards an abutment surface in order to clamp cable between the leading end of the plug and the abutment surface, the plug and walls having co-operating recesses and projections resisting move ment of the plug, wherein the recesses and projections are elongate and extend cross wise of the direction of movement of the plug and cross wise of the direction in which lies cable placed between the plug and abutment surface.

An embodiment of the invention will be described below with reference to the accompanying drawing, in which a draw-relieving nipple or cable clamp according to the invention for an electric line or cable is illustrated.

The draw-relieving nipple or cable clamp illustrated in the drawing is mounted in a housing 6 for securing an electric line or an electric cable 2 and is formed by a slider or plug 1 with grooved surface portions 1 a, 1 b.

The slider 1 is insertable in a channel 4 having walls with at least two opposed substantially parallel surfaces extending in a first direction. The channel 4 is open at the top and has substantially corresponding grooved surface portions 4a, 4b, so as to allow the slider 1 to engage said channel. The grooved surface portions 1 a, 1 b, 4a, 4b are preferably serrated in such a manner that the slider 1 is only displaceable in one direction toward a member 3 having an abutment surface spaced from the walls of the channel 4. The serrated grooves are preferably rectilinear and extend substantially transverse to the inserting direction of the slider 1 in such a manner that the slider 1 is easily demountable by a displacement transverse to the inserting direction, e.g.

by means of s screwdriver.

The slider 1 is preferably slotted at 5 in such a manner that it is easy to displace so as to secure the line in question.

A particular advantage of the draw-relieving nipple according to the invention is that it does not damage the line in question, In addition, it is easy to mount and it is not limited to a specific line thickness.

The grooved surface portions 1 a, 1 b, 4a, 4b may, of course, be shaped in several ways.

They may for instance also be wavy. The surface portions of the slider must only be capable of engaging the surface portions of the channel.

The slider is preferably made of plastics.

The individual conductors of the electric line may for instance be secured in sockets 7.

A particular advantage of the draw-relieving nipple according to the invention is that its height does not substantially exceed the thickness of the line or cable. In addition, the draw-relieving nipple is horizontally positioned.

The draw-relieving nipple and the sockets are situated in the housing closable by means of a cover.

**WARNING** end of DESC field may overlap start of CLMS **.

Claims

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION A draw-relieving nipple The invention relates to a draw-relieving nipple or cable clamp for electric lines or cables for instance in a plug and formed by a slider with grooved surface portions, said stider being insertable in a preferably horizontal channel with substantially corresponding grooved surface portions so as to engage said channel, whereby the grooved surface portions of the channel are optionally laterally reversed relative to the grooved surface portions of the slider. U.S. Patent Specification No. 1,542,421 discloses a draw-relieving nipple whereby the grooved surface portions are parallel to the electric line, cf. Fig. 1. A draw-back of this nipple is that it can be displaced when the line or cable is pulled. Attempts have been made in Norwegian published Specification No. B 1 38,679 to solve this problem by providing a pocket 4 implying that the draw-relieving nipple cannot be displaced in the longitudinal direction. This pocket is, however, encumbered with the draw-back that the draw-relieving nipple cannot be removed when the electric line is to be demounted. According to the invention the grooved surface portions are positioned substantially perpendicular to the electric line. In this manner the draw-relieving nipple is not displaced when the line is pulled, and the draw-relieving nipple is easily removable by displacing the nipple transversely to the line when said line is to be dismounted. In another aspect the invention provides a device comprising a cable clamp, the clamp comprising two opposed substantially parallel surfaces extending in a first direction, an abutment surface facing and spaced in the first direction from one end of the said two opposed surfaces, cable to be clamped being placed between the abutment surface and that one end of the said two opposed surfaces to extend in a second direction cross wise of the first direction, and a plug adapted to be displaced in the first direction between the said two opposed surfaces and towards the abutment surface in order to clamp cable between the leading end of the plug and the abutment surface, the said two opposed surfaces and surfaces of the plug having cooperating recesses and projections for engaging with one another to resist movement of the plug in the first direction, wherein the recesses and projections are elongate and extend cross wise of the first and second directions. In a further aspect the invention provides a cable clamp in which a plug is movable between two walls towards an abutment surface in order to clamp cable between the leading end of the plug and the abutment surface, the plug and walls having co-operating recesses and projections resisting move ment of the plug, wherein the recesses and projections are elongate and extend cross wise of the direction of movement of the plug and cross wise of the direction in which lies cable placed between the plug and abutment surface. An embodiment of the invention will be described below with reference to the accompanying drawing, in which a draw-relieving nipple or cable clamp according to the invention for an electric line or cable is illustrated. The draw-relieving nipple or cable clamp illustrated in the drawing is mounted in a housing 6 for securing an electric line or an electric cable 2 and is formed by a slider or plug 1 with grooved surface portions 1 a, 1 b. The slider 1 is insertable in a channel 4 having walls with at least two opposed substantially parallel surfaces extending in a first direction. The channel 4 is open at the top and has substantially corresponding grooved surface portions 4a, 4b, so as to allow the slider 1 to engage said channel. The grooved surface portions 1 a, 1 b, 4a, 4b are preferably serrated in such a manner that the slider 1 is only displaceable in one direction toward a member 3 having an abutment surface spaced from the walls of the channel 4. The serrated grooves are preferably rectilinear and extend substantially transverse to the inserting direction of the slider 1 in such a manner that the slider 1 is easily demountable by a displacement transverse to the inserting direction, e.g. by means of s screwdriver. The slider 1 is preferably slotted at 5 in such a manner that it is easy to displace so as to secure the line in question. A particular advantage of the draw-relieving nipple according to the invention is that it does not damage the line in question, In addition, it is easy to mount and it is not limited to a specific line thickness. The grooved surface portions 1 a, 1 b, 4a, 4b may, of course, be shaped in several ways. They may for instance also be wavy. The surface portions of the slider must only be capable of engaging the surface portions of the channel. The slider is preferably made of plastics. The individual conductors of the electric line may for instance be secured in sockets 7. A particular advantage of the draw-relieving nipple according to the invention is that its height does not substantially exceed the thickness of the line or cable. In addition, the draw-relieving nipple is horizontally positioned. The draw-relieving nipple and the sockets are situated in the housing closable by means of a cover. CLAIMS

1. A draw-relieving nipple for electric lines for instance in a plug and formed by a slider with grooved surface portions, said slider being insertable in a preferably horizontal channel with substantially corresponding grooved surface portions so as to engage said channel, whereby the grooved surface portions of the channel are optionally laterally reversed relative to the grooved surface portions of the slider, characterised by the grooved surface portions being positioned substantially perpendicular to the drawing direction of the electric line.

2. A draw-relieving nipple as claimed in Claim 1, characterised by the grooves being substantially; rectilinear and extending substantially transversely to the inserting direction of the slider.

3. A draw-relieving nipple as claimed in Claim 1 or 2, characterised by the grooved surface portions being serrated.

4. A draw-relieving nipple as claimed in Claims 1 to 3, characterised by the channel being open at the top.

5. A draw-relieving nipple substantially as described above and with reference to the accompanying drawing.

6. A device comprising a cable clamp, the clamp comprising two opposed substantially parallel surfaces extending in a first direction, an abutment surface facing and spaced in the first direction from one end of the said two opposed surfaces, cable to be clamped being placed between the abutment surface and that one end of the said two opposed surfaces to extend in a second direction cross wise of the first direction, and a plug adapted to be displaced in the first direction between the said two opposed surfaces and towards the abutment surface in order to clamp cable between the leading end of the plug and the abutment surface, the said two opposed surfaces and surfaces of the plug having cooperating recesses and projections for engaging with one another to resist movement of the plug in the first direction, wherein the recesses and projections are elongate and extend cross wise of the first and second directions.

7. A cable clamp in which a plug is movable between two walls towards an abutment surface in order to clamp cable between the leading end of the plug and the abutment surface, the plug and walls having co-operating recesses and projections resisting movement of the plug, wherein the recesses and projections are elongate and extend cross wise of the direction of movement of the plug and cross wise of the direction in which lies cable placed between the plug and abutment surface.