CA1272402A - Staple for electrical cable - Google Patents
Staple for electrical cableInfo
- Publication number
- CA1272402A CA1272402A CA000466232A CA466232A CA1272402A CA 1272402 A CA1272402 A CA 1272402A CA 000466232 A CA000466232 A CA 000466232A CA 466232 A CA466232 A CA 466232A CA 1272402 A CA1272402 A CA 1272402A
- Authority
- CA
- Canada
- Prior art keywords
- leg
- staple
- wire
- stop
- support
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B15/00—Nails; Staples
- F16B15/0015—Staples
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F45/00—Wire-working in the manufacture of other particular articles
- B21F45/16—Wire-working in the manufacture of other particular articles of devices for fastening or securing purposes
- B21F45/24—Wire-working in the manufacture of other particular articles of devices for fastening or securing purposes of staples; of belt-fastening elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F5/00—Upsetting wire
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L3/00—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets
- F16L3/02—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets partly surrounding the pipes, cables or protective tubing
- F16L3/04—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets partly surrounding the pipes, cables or protective tubing and pressing it against a wall or other support
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/26—Installations of cables, lines, or separate protective tubing therefor directly on or in walls, ceilings, or floors
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Installation Of Indoor Wiring (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A staple for use in attaching electric cable.
The staple is formed from a piece of wire bent into a U-shape to provide two legs and a cross-bar. Integral stop means are provided on each leg to limit penetration of the leg into a support. In one embodiment, the stop means comprises a flattened loop formed by bending each leg. In another embodiment, the stop means comprises a flange formed in each leg by upsetting.
The invention is also directed toward a method of making the staple with the flanges.
A staple for use in attaching electric cable.
The staple is formed from a piece of wire bent into a U-shape to provide two legs and a cross-bar. Integral stop means are provided on each leg to limit penetration of the leg into a support. In one embodiment, the stop means comprises a flattened loop formed by bending each leg. In another embodiment, the stop means comprises a flange formed in each leg by upsetting.
The invention is also directed toward a method of making the staple with the flanges.
Description
~27~
STAPLE FOR ELECTRICAL CA~3I.E
___ This invention is directed toward an improved staple, and to a method of making the staple.
The invention is more particularly directed toward an improved staple for use in attaching electric cable to a support, and to a method of making the staple.
Staples for use in attaching electric cables are known. The staples are U-shaped with a pair of legs and a cross-bar. Such staples have stop means for limiting the penetration of the legs of the staples into the support. The stop means prevent the cross-bar of the staple from pinching, and possibly damaging, the electric cable held by the staple.
One type of staple commonly used is made from sheet material. The legs are bent from the cross-bar and tapered to a point. Tabs are cut, and bent laterally, from the legs to provide the penetration limiting stops. The staples are effective, but quite expensive because of the amount of material required to make ~he staple. The legs must be quite wide at their upper end to provide enough material for making the tabs, and thus the cross-bar i9 also quite wide.
It is the purpose of the present invention to provide a simple, relatively inexpensive staple for use in attaching electrical cable. It is also a purpose of the present invention to provide a simple, relatively inexpensive method for making such staples.
In accordance with the present invention there is provided a staple made from wire, and bent in a U-shape to provide a pair of legs and a cross-bar.
STAPLE FOR ELECTRICAL CA~3I.E
___ This invention is directed toward an improved staple, and to a method of making the staple.
The invention is more particularly directed toward an improved staple for use in attaching electric cable to a support, and to a method of making the staple.
Staples for use in attaching electric cables are known. The staples are U-shaped with a pair of legs and a cross-bar. Such staples have stop means for limiting the penetration of the legs of the staples into the support. The stop means prevent the cross-bar of the staple from pinching, and possibly damaging, the electric cable held by the staple.
One type of staple commonly used is made from sheet material. The legs are bent from the cross-bar and tapered to a point. Tabs are cut, and bent laterally, from the legs to provide the penetration limiting stops. The staples are effective, but quite expensive because of the amount of material required to make ~he staple. The legs must be quite wide at their upper end to provide enough material for making the tabs, and thus the cross-bar i9 also quite wide.
It is the purpose of the present invention to provide a simple, relatively inexpensive staple for use in attaching electrical cable. It is also a purpose of the present invention to provide a simple, relatively inexpensive method for making such staples.
In accordance with the present invention there is provided a staple made from wire, and bent in a U-shape to provide a pair of legs and a cross-bar.
2~ penetration limiting stop is integrally formed on each wire leg. In one embodiment of the invention, the stop is formed by bending the wire in each leg transversely outwardly into a flattened loop. The loop in each leg forms a stop that limits penetration of the leg into the support. In another embodiment of the invention, the stop is formed by upsetting the material in each leg to form an integral flange that projects laterally of the leg. The flan~e in each leg forms a stop that limits penetration of the leg into the support.
The invention also covers a method of making the staple having the flange stops. The method involves taking a straight piece of wire and placing it in a die. Pressure is applied to the ends of the wire to cause wire material to flow into cavities in the die to form the flanges. The wire is then removed, pointed and bent to form a U-shape staple with the flanges located in the legs.
The invention is particularly directed toward a staple for use in fastening an electric cable, the staple comprising a piece of wire bent in a U-shape to form two legs and a cross-bar. Integral stop means are formed on each leg to limit penetration of the leg into a support.
In one embodiment of the invention, the stop means comprises a flattened loop formed in each leg by bending the wire. The loop projects trans-versely outwardly of the leg.
In another embodiment of the invention, the stop means comprises a flange integrally formed in each leg and extending transversely outwardly of the leg.
The invention will now be described in detail having reference to -the accompanying drawings in which:
Fig. 1 is a Eront view of one embodiment of the staple;
Fig. 2 is a top view of the staple shown in Fig. l;
Fig. 3 is a front view of the staple shown in Fig. 1, hammered into a support;
Fig. 4 is a front view of another embodiment of the staple;
Fig. 5 is a top view of the staple shown in Fig. 4;
Fig. 6 is a cross-section view of a die showing the staple of Fig. 4 being formed; and Fig. 7 is a front view of the staple after forming in the die, and before pointing and bending.
The staple 1 of the present invention, as shown in Figs. 1 and 2, has a U-shape defined by a pair of legs 3, 5 and a cross-bar 7. The legs 3, 5 extend transversely from the cross-bar 7 in the same direction, are genexally parallel to each other, and are approximately of the same length. The free end 9, 11 of each leg 3, 5 respectively is pointed. The staple 1 is formed from a piece of wire 13 that is bent through ninety degrees twice, as shown at 15, 17, to form the U-shape defined by legs 3, 5 and cross-bar 7.
In accordance with the present invention, integral stop means 21 are provided on each leg 3, 5 for limiting penetration of the leg into a support 23 when the staple is driven into the support as shown in Fig. 3. The stop means 21 extends transverse to each leg and serves to space the cross-bar 7 from the support 23 a distance generally equal to the thickness of an electrical cable 25 held by the staple 1. Thus ~ ;~7~
the cable 25 is not pinched and damaged by the cross-bar 7 when the staple 1 is driven.
The stop means 21 on each leg 3, 5 is the same so only one will be described in detail. The stop means 21 on leg 3 comprises a flattened loop 29 formed in that section of wire piece 13 forming leg 3. The flattened loop 29 has a top arm 31 and a bottom arm 33. The arms 31, 33 are parallel and adjacent, and extend transverse of leg 3, and away from leg 5. The loop 29 is formed by first bending wire piece 13 ninety degrees outwardly, as shown at 351 in leg 3 to form top arm 31. The wire piece 13 is next bent at 37 through one hundred and eighty degrees to form bottom arm 33 r and then through ninety degrees as shown at 39 to connect loop 29 to leg 3.
The loop 29 is relatively short and need only be made long enough so that arms 31, 33 will not enter the support 23 when the staple 1 is driven into the support 23. Thus the arms 31, 33 space the cross-bar 7 from the support 23. It is seen that staple 1 is simply formed from a single leng-th of wire that is bent to both give the staple its standard U-shape, and to provide it with penetration limiting stops.
In another embodiment of the invention, the staple can be provided with integral penetration limiting stops that are formed by upsetting stop flanges from the legs. In this embodiment as shown in Figs. 4 and 5, the staple 101 has a U-shape, as before, defined by legs 103, 105 and a cross-bar 107.
The legs 103,105 are generally parallel and of approximately the same length. Their free ends 109, 111 are pointed. The staple 101 is formed from a piece of wire 113 that is bent twice, as shown at 115, 117, to form the U-shape.
The stop means 121 on each leg 103, 105 comprises 7~
an integral disk 123 formed on the leg to extend -transverse of the leg. The disk 123 is preferably offset from the leg to be outwardly eccentric with respect to the leg as shown in Fig. 5. This pro-vides a larger stop surface for the size of disk, thanif the same size of disk were concentric with the leg.
The staple 101 is formed by cutting a straight length 113 of wire, and placing the wire in a die 131 as shown in Fig. 6. Pressure is applied on the ends 133, 135 of the wire piece 113 while in the die 131 by plungers 137, 139. This pressure causes material from the wire piece 113 to flow into cavities 141,143 shaped to form disks 123. Once the disks 15 123 are formed in the cavities 141, 143, the wire piece 113 is removed from the die 131 as shown in Fig. 7, and then pointed and bent to form the U-shaped staple 101 with the stop disks 123 located in the legs 103, 105.
Various changes may be made to the embodiments shown herein without departing from the scope of the present invention which is limited only by the following Claims.
The invention also covers a method of making the staple having the flange stops. The method involves taking a straight piece of wire and placing it in a die. Pressure is applied to the ends of the wire to cause wire material to flow into cavities in the die to form the flanges. The wire is then removed, pointed and bent to form a U-shape staple with the flanges located in the legs.
The invention is particularly directed toward a staple for use in fastening an electric cable, the staple comprising a piece of wire bent in a U-shape to form two legs and a cross-bar. Integral stop means are formed on each leg to limit penetration of the leg into a support.
In one embodiment of the invention, the stop means comprises a flattened loop formed in each leg by bending the wire. The loop projects trans-versely outwardly of the leg.
In another embodiment of the invention, the stop means comprises a flange integrally formed in each leg and extending transversely outwardly of the leg.
The invention will now be described in detail having reference to -the accompanying drawings in which:
Fig. 1 is a Eront view of one embodiment of the staple;
Fig. 2 is a top view of the staple shown in Fig. l;
Fig. 3 is a front view of the staple shown in Fig. 1, hammered into a support;
Fig. 4 is a front view of another embodiment of the staple;
Fig. 5 is a top view of the staple shown in Fig. 4;
Fig. 6 is a cross-section view of a die showing the staple of Fig. 4 being formed; and Fig. 7 is a front view of the staple after forming in the die, and before pointing and bending.
The staple 1 of the present invention, as shown in Figs. 1 and 2, has a U-shape defined by a pair of legs 3, 5 and a cross-bar 7. The legs 3, 5 extend transversely from the cross-bar 7 in the same direction, are genexally parallel to each other, and are approximately of the same length. The free end 9, 11 of each leg 3, 5 respectively is pointed. The staple 1 is formed from a piece of wire 13 that is bent through ninety degrees twice, as shown at 15, 17, to form the U-shape defined by legs 3, 5 and cross-bar 7.
In accordance with the present invention, integral stop means 21 are provided on each leg 3, 5 for limiting penetration of the leg into a support 23 when the staple is driven into the support as shown in Fig. 3. The stop means 21 extends transverse to each leg and serves to space the cross-bar 7 from the support 23 a distance generally equal to the thickness of an electrical cable 25 held by the staple 1. Thus ~ ;~7~
the cable 25 is not pinched and damaged by the cross-bar 7 when the staple 1 is driven.
The stop means 21 on each leg 3, 5 is the same so only one will be described in detail. The stop means 21 on leg 3 comprises a flattened loop 29 formed in that section of wire piece 13 forming leg 3. The flattened loop 29 has a top arm 31 and a bottom arm 33. The arms 31, 33 are parallel and adjacent, and extend transverse of leg 3, and away from leg 5. The loop 29 is formed by first bending wire piece 13 ninety degrees outwardly, as shown at 351 in leg 3 to form top arm 31. The wire piece 13 is next bent at 37 through one hundred and eighty degrees to form bottom arm 33 r and then through ninety degrees as shown at 39 to connect loop 29 to leg 3.
The loop 29 is relatively short and need only be made long enough so that arms 31, 33 will not enter the support 23 when the staple 1 is driven into the support 23. Thus the arms 31, 33 space the cross-bar 7 from the support 23. It is seen that staple 1 is simply formed from a single leng-th of wire that is bent to both give the staple its standard U-shape, and to provide it with penetration limiting stops.
In another embodiment of the invention, the staple can be provided with integral penetration limiting stops that are formed by upsetting stop flanges from the legs. In this embodiment as shown in Figs. 4 and 5, the staple 101 has a U-shape, as before, defined by legs 103, 105 and a cross-bar 107.
The legs 103,105 are generally parallel and of approximately the same length. Their free ends 109, 111 are pointed. The staple 101 is formed from a piece of wire 113 that is bent twice, as shown at 115, 117, to form the U-shape.
The stop means 121 on each leg 103, 105 comprises 7~
an integral disk 123 formed on the leg to extend -transverse of the leg. The disk 123 is preferably offset from the leg to be outwardly eccentric with respect to the leg as shown in Fig. 5. This pro-vides a larger stop surface for the size of disk, thanif the same size of disk were concentric with the leg.
The staple 101 is formed by cutting a straight length 113 of wire, and placing the wire in a die 131 as shown in Fig. 6. Pressure is applied on the ends 133, 135 of the wire piece 113 while in the die 131 by plungers 137, 139. This pressure causes material from the wire piece 113 to flow into cavities 141,143 shaped to form disks 123. Once the disks 15 123 are formed in the cavities 141, 143, the wire piece 113 is removed from the die 131 as shown in Fig. 7, and then pointed and bent to form the U-shaped staple 101 with the stop disks 123 located in the legs 103, 105.
Various changes may be made to the embodiments shown herein without departing from the scope of the present invention which is limited only by the following Claims.
Claims (9)
1. A staple for use in fastening an electric cable, the staple comprising a piece of wire bent in a U-shape to form two legs and a cross-bar, and stop means occurring at an intermediate point on each leg to limit penetration of the leg into a support adapted to hold the cable with the stop means bearing against the support, the stop means comprising:
a flattened loop in each leg at the intermediate point, the loop projecting transversely, outwardly of the leg.
a flattened loop in each leg at the intermediate point, the loop projecting transversely, outwardly of the leg.
2. A staple as claimed in Claim 1 wherein the stop means comprises a flange in each leg, the flange extending transversely of the leg.
3. A staple as claimed in Claim 2 wherein each flange is disk-shaped and eccentric with respect to the leg and is offset outwardly away from the other leg.
4. In combination a staple supporting an electric cable, the staple comprising a piece of wire bent in a U-shape to form two legs and a cross-bar, and stop means occurring at an intermediate point on each leg to limit penetration of the leg into the support and hold the cable with the stop bearing against the support, the stop means comprising:
a flattened loop in each leg at the intermediate point, the loop projecting transversely, outwardly of the leg.
a flattened loop in each leg at the intermediate point, the loop projecting transversely, outwardly of the leg.
5. A staple for use in fastening an electric cable, the staple comprising a piece of wire bent in a U-shape to form two legs and a cross-bar, the wire additionally bent at an intermediate point in each leg to form a laterally projecting, flattened loop which acts as a stop limiting penetration of the leg into a support and hold the cable with the stop bearing against the support.
6. A staple as claimed in Claim 5 wherein the flattened loop has an upper arm portion and an adjacent, parallel, lower arm portion.
7. A staple for use in fastening an electric cable, the staple comprising a piece of wire bent in a U-shape to form two legs and a cross-bar, and a flange integrally formed at an intermediate point on each leg and extending laterally of the leg to act as a stop limiting penetration of the leg into a support adapted to hold the cable with the stop bearing against the support, the flange being disk-shaped and eccentric with respect to the wire leg, each flange offset outwardly away from the other leg.
8. The staple as claimed in Claim 5 or Claim 7 in combination with an electric cable, wherein the cable extends into the support to the stop at the intermediate point, and holds the cable therein.
9. A method of making a staple comprising:
providing a straight length of wire;
placing the wire in a die; applying pressure on the ends of the wire to cause it to flow into cavities in the die to form stop flanges; removing the wire from the die; pointing the ends; and bending it into a U-shape with the stop flanges located in the legs.
providing a straight length of wire;
placing the wire in a die; applying pressure on the ends of the wire to cause it to flow into cavities in the die to form stop flanges; removing the wire from the die; pointing the ends; and bending it into a U-shape with the stop flanges located in the legs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000466232A CA1272402A (en) | 1984-10-24 | 1984-10-24 | Staple for electrical cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000466232A CA1272402A (en) | 1984-10-24 | 1984-10-24 | Staple for electrical cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1272402A true CA1272402A (en) | 1990-08-07 |
Family
ID=4128991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000466232A Expired CA1272402A (en) | 1984-10-24 | 1984-10-24 | Staple for electrical cable |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1272402A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0566938A1 (en) * | 1992-04-22 | 1993-10-27 | Friedhelm Post Sondermaschinen | Process and bending machine for producing a bended wire or tube part with an upsetted zone |
-
1984
- 1984-10-24 CA CA000466232A patent/CA1272402A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0566938A1 (en) * | 1992-04-22 | 1993-10-27 | Friedhelm Post Sondermaschinen | Process and bending machine for producing a bended wire or tube part with an upsetted zone |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |