CA1247676A - Hoisting cable fitting - Google Patents
Hoisting cable fittingInfo
- Publication number
- CA1247676A CA1247676A CA000462965A CA462965A CA1247676A CA 1247676 A CA1247676 A CA 1247676A CA 000462965 A CA000462965 A CA 000462965A CA 462965 A CA462965 A CA 462965A CA 1247676 A CA1247676 A CA 1247676A
- Authority
- CA
- Canada
- Prior art keywords
- cable
- hoisting
- loops
- fitting
- cable fitting
- 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
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Landscapes
- Suspension Of Electric Lines Or Cables (AREA)
Abstract
Abstract A hoisting cable fitting employing clevis-shaped pieces instead of eyebolts to provide attachment points for cable loops.
Description
'7~6 ~N IMPROVED HOIS~ING C~BLE ~ITTING
This invention relates to a hoisting cable fitting, and more particularly to a hoisting cable fitting especially useful with a hoisting system o~ a raising and lowering device used to lower lighting fixtures to the ground from the top of tall poles for the purpose of maintaining the lighting fixtures.
With most lowering devices, a lighting fixture is connected to a support ring suspended from at least two and usually three separate cables. These three cables are attached to a hoisting cable fitting which in turn is attached to a single cable leading to a winching device. The hoisting cable fitting may incorporate a number of features to insure the proper overall operation of the lowerins device such as an electrical supply cord for supplying electric power to the lighting fixture on the support ring, a specific shape to insure that the cables, as well as the hoisting cable fitting can pass up and down the center of the pole supporting the lowering device, and provisions for mechanisms to pre~ent the falling of the support ring should portions of the hoisting system fail. The cables are us~ally attached to the hoisting cable fitting by forming a loop at the end of the cable using commercially available cable clamps and protective thimbles. ~hese loops are attached to eyebolts which are either rigidly fixed to the hoisting cable fitting or attached in conjunction with a swivel bearing or compression spring to the hoisting cable fitting. Unfortunately, a potential problem exists with such an attachment method inasmuch as the cable loops may become twisted on the eyebolts so that they are essentially attached to the bottom portion of the eyebolt instead of to the top of the eyebolt. In such an instance, if the low~rlng device is set up and adjusted with one or more of loops improperly oriented, at a later time the cable loop may twist and fall into it's proper position placing the lowering device out of adjustment and possibly inoperable.
It is an object of the present invention to provide a hoisting cable fitting which does not use ayebolts in any form.
It is another object of the present in~ention to provid0 a hoisting cable fitting ~hich provides attachment points for cable loops but does not provide a surface on which the cable loops can improperly catch or enga~e.
: ,~ ~
`' `' ''- ~
' ' ' ' !~
7~ 76 Summary of the Invention Accordingly, the present inventi~n provides a hoisting cable fitting which does not use eyebolts in any form but instead employs clevis-shaped piec0s which provide attachment points for cable loops.
sr;ef Description of the Drawings Fig. 1 is a perspective view of a hoisting cable fitting employing three eyebolts for receiYing cable loops.
Fig. 2 is a perspective view of a hoisting cabls fitting with ~hree clevis or V shaped pieces which provide attachment points for cable loops.
Fig. 3 is a perspective view of a hoisting cable fitting employin~ three U shaped members to pro~ide attachment points for cable loops.
Detailed DescriPtion of the Inve tion Referring now to the Drawings, in Fig. 1 there is shown a hoisting cable fitting generally identi~ied by the re~erence numeral 10 having a U-Shaped bottom portion 12 extending downward from a circular plate 14 for attachment to a single cable (not shown) leading to a winching device (not shown).
As is conventional in the prior art, the hoisting cable 10 is provided with three eyebolts 16, 18 and 20 extending through holes in the circular plate 14 and rigidly attached thereto by nuts 22 engaging a threaded portion of the eyebolts 16, 18 and 20. Three cables 21, 22 and 23 attached to a lightin~ fixture support ring (not shown~ have loops 22, 24 and 26 formed at their ends for attachment with the eyebolts 16, 18, and 20.
As illustrated in Fig. 1, a potential problem exists with the use of these eyebolts when instead of the loop 26 sngaging th~
top of the eyebolt 20, the cable loop becomes twisted on the eyebolt 20 and engages the bottom portion of the eyebolt 20. If the lowering device is set up and adjusted with the loop 26 engaging the bottom portion of the eyebolt 20, it i5 possible that the loop 26 may later shift it's position and engage the top o~ the eyebolt 20 in which case the lowering device would be out of adjustment and pos~ibly inoperable.
7~
In the present invention, a cable fitting device is provided which does not use eyebolts in any form. Instead, as illustrated in Fig. 2, clevice or V-shaped pieces provide engaging points for the cable loops but do not provide a surface on which the cable loops can be caught or improperly enga8ed.
In Fig. 2, three cable engaging points 40, 42 and 44 are fabricated from a formed metal rod which is welded or otherwise attached to the circular plate 14.
In Fig. 3, engaging points are provided by three U Bolts 52, Sb and 56 with their ends e~tending through holes in circular plate 14 and rigidly attached thereto by the means of nuts 58 or other such fasteners.
While the invention has been particularly shown and described in reference to preferred embodiments thereof, it will be understood by those skilled in the art, that various chan~es of form and detsils may be made therein without departing from the spirit and scope of the invention.
- '` - ~ .
`: ~
This invention relates to a hoisting cable fitting, and more particularly to a hoisting cable fitting especially useful with a hoisting system o~ a raising and lowering device used to lower lighting fixtures to the ground from the top of tall poles for the purpose of maintaining the lighting fixtures.
With most lowering devices, a lighting fixture is connected to a support ring suspended from at least two and usually three separate cables. These three cables are attached to a hoisting cable fitting which in turn is attached to a single cable leading to a winching device. The hoisting cable fitting may incorporate a number of features to insure the proper overall operation of the lowerins device such as an electrical supply cord for supplying electric power to the lighting fixture on the support ring, a specific shape to insure that the cables, as well as the hoisting cable fitting can pass up and down the center of the pole supporting the lowering device, and provisions for mechanisms to pre~ent the falling of the support ring should portions of the hoisting system fail. The cables are us~ally attached to the hoisting cable fitting by forming a loop at the end of the cable using commercially available cable clamps and protective thimbles. ~hese loops are attached to eyebolts which are either rigidly fixed to the hoisting cable fitting or attached in conjunction with a swivel bearing or compression spring to the hoisting cable fitting. Unfortunately, a potential problem exists with such an attachment method inasmuch as the cable loops may become twisted on the eyebolts so that they are essentially attached to the bottom portion of the eyebolt instead of to the top of the eyebolt. In such an instance, if the low~rlng device is set up and adjusted with one or more of loops improperly oriented, at a later time the cable loop may twist and fall into it's proper position placing the lowering device out of adjustment and possibly inoperable.
It is an object of the present invention to provide a hoisting cable fitting which does not use ayebolts in any form.
It is another object of the present in~ention to provid0 a hoisting cable fitting ~hich provides attachment points for cable loops but does not provide a surface on which the cable loops can improperly catch or enga~e.
: ,~ ~
`' `' ''- ~
' ' ' ' !~
7~ 76 Summary of the Invention Accordingly, the present inventi~n provides a hoisting cable fitting which does not use eyebolts in any form but instead employs clevis-shaped piec0s which provide attachment points for cable loops.
sr;ef Description of the Drawings Fig. 1 is a perspective view of a hoisting cable fitting employing three eyebolts for receiYing cable loops.
Fig. 2 is a perspective view of a hoisting cabls fitting with ~hree clevis or V shaped pieces which provide attachment points for cable loops.
Fig. 3 is a perspective view of a hoisting cable fitting employin~ three U shaped members to pro~ide attachment points for cable loops.
Detailed DescriPtion of the Inve tion Referring now to the Drawings, in Fig. 1 there is shown a hoisting cable fitting generally identi~ied by the re~erence numeral 10 having a U-Shaped bottom portion 12 extending downward from a circular plate 14 for attachment to a single cable (not shown) leading to a winching device (not shown).
As is conventional in the prior art, the hoisting cable 10 is provided with three eyebolts 16, 18 and 20 extending through holes in the circular plate 14 and rigidly attached thereto by nuts 22 engaging a threaded portion of the eyebolts 16, 18 and 20. Three cables 21, 22 and 23 attached to a lightin~ fixture support ring (not shown~ have loops 22, 24 and 26 formed at their ends for attachment with the eyebolts 16, 18, and 20.
As illustrated in Fig. 1, a potential problem exists with the use of these eyebolts when instead of the loop 26 sngaging th~
top of the eyebolt 20, the cable loop becomes twisted on the eyebolt 20 and engages the bottom portion of the eyebolt 20. If the lowering device is set up and adjusted with the loop 26 engaging the bottom portion of the eyebolt 20, it i5 possible that the loop 26 may later shift it's position and engage the top o~ the eyebolt 20 in which case the lowering device would be out of adjustment and pos~ibly inoperable.
7~
In the present invention, a cable fitting device is provided which does not use eyebolts in any form. Instead, as illustrated in Fig. 2, clevice or V-shaped pieces provide engaging points for the cable loops but do not provide a surface on which the cable loops can be caught or improperly enga8ed.
In Fig. 2, three cable engaging points 40, 42 and 44 are fabricated from a formed metal rod which is welded or otherwise attached to the circular plate 14.
In Fig. 3, engaging points are provided by three U Bolts 52, Sb and 56 with their ends e~tending through holes in circular plate 14 and rigidly attached thereto by the means of nuts 58 or other such fasteners.
While the invention has been particularly shown and described in reference to preferred embodiments thereof, it will be understood by those skilled in the art, that various chan~es of form and detsils may be made therein without departing from the spirit and scope of the invention.
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`: ~
Claims (4)
1. A hoisting cable fitting such as that used in a hoisting system of a lighting system raising and lowering device for connecting a loop of one cable connected to a winch or the like, with the loops of a plurality of cables connected at the other ends to a lighting fixture support device comprising, a single member attfached to one side of a common member for engaging said loop of said one cable, and a plurality of V-shaped members attached at their ends on the other side of the common member for engaging said loops of said plurality of cables,
2. A hoisting cable fitting such as that used in a hoisting system of a lighting system raising and lowering device for connecting a loop of one cable connected to a winch or the like, to the loops of a plurality of cables connected at their other end to a lighting fixture support device comprising a single member attached to one side of a common member for engaging the loop of said one cable and a plurality of U-shaped members attached to their ends to the other side of the common fitting for engaging said loops of said plurality of cables.
3. A hoisting cable fitting as defined in Claim 2 wherein said plurality of U-shaped members are integrally formed in one piece.
4. A hoisting cable fitting as defined in Claim 1 wherein said plurality of V-shaped members are integrally formed in one piece.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US53332383A | 1983-09-16 | 1983-09-16 | |
| US06/533,323 | 1983-09-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1247676A true CA1247676A (en) | 1988-12-28 |
Family
ID=24125458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000462965A Expired CA1247676A (en) | 1983-09-16 | 1984-09-12 | Hoisting cable fitting |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1247676A (en) |
-
1984
- 1984-09-12 CA CA000462965A patent/CA1247676A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |