GB2181986A

GB2181986A - Cable stripper

Info

Publication number: GB2181986A
Application number: GB08526457A
Authority: GB
Inventors: Zdzislaw Bieganski
Original assignee: Abeco Ltd
Current assignee: Abeco Ltd
Priority date: 1985-10-26
Filing date: 1985-10-26
Publication date: 1987-05-07
Also published as: GB8526457D0

Abstract

A pair of jaws are provided with semi-cylindrical recesses 22 to accept a cable therein. A pair of cutters 24 is provided at one or both ends of the recesses and the cutters have shaped edges so that with relative rotation of closed jaws upon the cable located between them, a peripheral cut in the cable is made. A second cutter 26 is provided for making the longitudinal slit in the cable for example to join the peripheral cuts, so that the insulation can be peeled off and bare the core or sheath. In a second embodiment, one of the jaws is provided with a recess extending perpendicularly to the recess 22 for receiving a cable when making a longitudinal slit. A rotatable cam is provided for adjusting the extent of closing of the jaws. In a third embodiment a pair of wheel cutters projecting into further recesses may be provided. The further recesses are disposed at an angle to a line extending perpendicularly to the recesses 22. <IMAGE>

Description

SPECIFICATION Cable stripper This invention relates to tools for stripping cable by making a peripheral cut to demarcate the stripped zone and one or more axial cuts to facilitate peeling the sheath from the core of the cable. The invention is particularly concerned with situations where the depth of cut must be controlled precisely to avoid damage to the core, and also situations where the stripped length is normally constant.

According to the invention, a cable stripper has a pair of jaws and a lever mechanism for closing them together, a recess extending transversely across each jaw and a cutting blade on each jaw such that when the jaws are closed the recesses are aligned to define a cable accommodating bore and the blades substantially meet to define an aperture having as its minimum transverse dimension the diameter of the core of the cable which is to be stripped, at least one of the jaws having a further projecting cutter.

Three embodiments of the invention are now described with reference to the accompanying drawings wherein: Figure 1 is a perspective fragmentary view of a first embodiment; Figure 2 is a side elevation of the same; Figure 3 is a plan view of the same; Figure 4 is a view similar to Fig. 1 of a second embodiment; Figure 5 is a side elevation of the second embodiment; Figure 6 is a fragmentary opposite side elevation of the Figs. 4 and 5 construction; Figure 7 is an end view of the Figs. 4 to 6 construction; Figure 8 is a side elevation of a third embodiment; Figure 9 is a fragmentary plan view of the Fig. 8 construction; and Figure 10 is a section taken on the line 3-3 of Fig. 9.

Referring now to Figs. 1 to 3 the stripping tool comprises a pair of lever like handles 10, 12 pivoted at 14 and extending beyond the pivot to form jaws 16, 18. The jaws are recessed and when completely closed together the recesses 22 define a substantially cylindrical cavity. Closing may be controlled by adjustable limit abutments in the form of screws 20. The length of the recesses is the required stripped length.

At each end of each jaw is a cutting blade 24 with an arcuate edge. In the fully closed position of the jaws the blades define an ellipse with a minor dimension D equal to the cable core diameter. Hence by locating the cable between the jaws and closing them together a cut is made, and by relatively rotating the cable and tool the cut becomes complete peripherally and radially of the sheath.

Each jaw also carries another blade 26 which projects above the jaw face for a distance P. By locating the cable so that the blades 26 are diametrically located and closing the jaws as far as possible, the blades 26 cut into the sheath and by relative axial movement can cut between the two peripheral cut made by the respective blades 24. The sheath segments can then be peeled off. The distance P is equal to the sheath thickness.

The second tool of Figs. 4 to 7 is generally similar but has only one pair of blades 24. It is intended for end stripping instead of midposition stripping. A second recess 30 extends across one jaw and the extra blade here indicated by reference 32 is carried by the other jaw and aligned with the extra recess. in this case the first peripheral cut is made as with Figs. 1 to 3 and the cable is then located in the recess 30 and the jaws are reclosed to make the axial cut.

In this second embodiment the depth of cut is adjustable by an eccentric or cam 34 pivoted at 36 and arranged to abut the opposite jaw. Indicia 38 may be aligned to signal minimum jaw closing for minimum cut penetration.

The third embodiment again is similar in being a pliers like tool with blades 24 at each end of the primary recess 22 in each jaw.

Like the second embodiment it has a second recess, in this case reference 40, in one jaw, but here the second recess is duplicated in the second jaw. Both jaws carry wheel-like cutters 42 projecting into the further recesses for making axial cuts which are diametrically located on the cable when it extends along the length of the recesses.

The second recesses are here inclined as an angle to the main recess as best seen in Fig.

9.

1. A cable stripper having a pair of jaws and a lever mechanism for closing them together, a recess extending transversely across each jaw and a cutting blade on each jaw such that when the jaws are closed the recesses are aligned to define a cable accommodating bore and the blades substantially meet to define an aperture having as its minimum transverse dimension the diameter of the core of the cable which is to be stripped, at least one of the jaws having a further projecting cutter.

2. A cable stripper as claimed in Claim 1 wherein each recess is substantially semi-cylindrical, and the axis of the cylinder extends parallel to a pivotal axis of the jaws and lever mechanisms.

3. A cable stripper as claimed in Claim 1 or Claim 2 wherein a cutting blade is provided at each end of each recess.

4. A cable stripper as claimed in any of Claims 1 to 3 wherein means are provided for

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

Claims

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

SPECIFICATION Cable stripper This invention relates to tools for stripping cable by making a peripheral cut to demarcate the stripped zone and one or more axial cuts to facilitate peeling the sheath from the core of the cable. The invention is particularly concerned with situations where the depth of cut must be controlled precisely to avoid damage to the core, and also situations where the stripped length is normally constant.

According to the invention, a cable stripper has a pair of jaws and a lever mechanism for closing them together, a recess extending transversely across each jaw and a cutting blade on each jaw such that when the jaws are closed the recesses are aligned to define a cable accommodating bore and the blades substantially meet to define an aperture having as its minimum transverse dimension the diameter of the core of the cable which is to be stripped, at least one of the jaws having a further projecting cutter.

Three embodiments of the invention are now described with reference to the accompanying drawings wherein: Figure 1 is a perspective fragmentary view of a first embodiment; Figure
2 is a side elevation of the same; Figure
3 is a plan view of the same; Figure
4 is a view similar to Fig. 1 of a second embodiment; Figure
5 is a side elevation of the second embodiment; Figure
6 is a fragmentary opposite side elevation of the Figs. 4 and 5 construction; Figure
7 is an end view of the Figs. 4 to 6 construction; Figure
8 is a side elevation of a third embodiment; Figure 9 is a fragmentary plan view of the Fig. 8 construction; and Figure 10 is a section taken on the line 3-3 of Fig. 9.

Referring now to Figs. 1 to 3 the stripping tool comprises a pair of lever like handles 10, 12 pivoted at 14 and extending beyond the pivot to form jaws 16, 18. The jaws are recessed and when completely closed together the recesses 22 define a substantially cylindrical cavity. Closing may be controlled by adjustable limit abutments in the form of screws 20. The length of the recesses is the required stripped length.

At each end of each jaw is a cutting blade 24 with an arcuate edge. In the fully closed position of the jaws the blades define an ellipse with a minor dimension D equal to the cable core diameter. Hence by locating the cable between the jaws and closing them together a cut is made, and by relatively rotating the cable and tool the cut becomes complete peripherally and radially of the sheath.

Each jaw also carries another blade 26 which projects above the jaw face for a distance P. By locating the cable so that the blades 26 are diametrically located and closing the jaws as far as possible, the blades 26 cut into the sheath and by relative axial movement can cut between the two peripheral cut made by the respective blades 24. The sheath segments can then be peeled off. The distance P is equal to the sheath thickness.

The second tool of Figs. 4 to 7 is generally similar but has only one pair of blades 24. It is intended for end stripping instead of midposition stripping. A second recess 30 extends across one jaw and the extra blade here indicated by reference 32 is carried by the other jaw and aligned with the extra recess. in this case the first peripheral cut is made as with Figs. 1 to 3 and the cable is then located in the recess 30 and the jaws are reclosed to make the axial cut.

In this second embodiment the depth of cut is adjustable by an eccentric or cam 34 pivoted at 36 and arranged to abut the opposite jaw. Indicia 38 may be aligned to signal minimum jaw closing for minimum cut penetration.

The third embodiment again is similar in being a pliers like tool with blades 24 at each end of the primary recess 22 in each jaw.

Like the second embodiment it has a second recess, in this case reference 40, in one jaw, but here the second recess is duplicated in the second jaw. Both jaws carry wheel-like cutters 42 projecting into the further recesses for making axial cuts which are diametrically located on the cable when it extends along the length of the recesses.

The second recesses are here inclined as an angle to the main recess as best seen in Fig.
9. A cable stripper substantially as described with reference to Figs. 1 to 3, 4 to 7, or 8 to 10 of the accompanying drawings.

9.

1. A cable stripper having a pair of jaws and a lever mechanism for closing them together, a recess extending transversely across each jaw and a cutting blade on each jaw such that when the jaws are closed the recesses are aligned to define a cable accommodating bore and the blades substantially meet to define an aperture having as its minimum transverse dimension the diameter of the core of the cable which is to be stripped, at least one of the jaws having a further projecting cutter.

2. A cable stripper as claimed in Claim 1 wherein each recess is substantially semi-cylindrical, and the axis of the cylinder extends parallel to a pivotal axis of the jaws and lever mechanisms.

3. A cable stripper as claimed in Claim 1 or Claim 2 wherein a cutting blade is provided at each end of each recess.

4. A cable stripper as claimed in any of Claims 1 to 3 wherein means are provided for controlling the extent of closing of the jaws.

5. A cable stripper as claimed in Claim 4 wherein said means comprise one or more screws.

6. A cable stripper as claimed in Claim 4 wherein said means comprise an eccentric or cam mounted on one jaw for closing abutment by the other jaw.

7. A cable stripper as claimed in any preceding claim wherein said further projecting cutter has a cutting edge projecting above the recess and to one side of the same.

8. A cable stripper as claimed in any of Claims 1 to 6 wherein a second recess is provided in at least one of the jaws for association with said further cutter whereby a cable located in and extending along said further recess can be axially slid after closing the jaws together and causing relative axial movement of cable and jaws.