GB2185706A - A hand tool for crimping a metal ferrule or terminal to a conductor - Google Patents
A hand tool for crimping a metal ferrule or terminal to a conductor Download PDFInfo
- Publication number
- GB2185706A GB2185706A GB08701985A GB8701985A GB2185706A GB 2185706 A GB2185706 A GB 2185706A GB 08701985 A GB08701985 A GB 08701985A GB 8701985 A GB8701985 A GB 8701985A GB 2185706 A GB2185706 A GB 2185706A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ratchet wheel
- pivotally mounted
- spring
- latch
- opening
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/04—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for forming connections by deformation, e.g. crimping tool
- H01R43/042—Hand tools for crimping
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Manufacturing Of Electrical Connectors (AREA)
Abstract
In a known form of hand tool, risk of damage to inter-engaging surfaces of a latch 17 and pivotally mounted jaw 3 of the tool because the pivotally mounted jaw is not effectively locked to the tool body 1 by the latch when a crimping operation is effected is eliminated by arranging for the latch to be operatively coupled via a lever 19 pivotally mounted on the body to a spring-loaded pawl 14 adapted to engage a ratchet wheel 11 which can be rotatably driven by a spring-loaded pinion 8 operated by a pivotable handle 7 to effect the crimping operation. If the pivotally mounted jaw 3 is not effectively locked to the body 1 by the latch 17, the lever 19 pivots to it disengage the pawl 14 from the ratchet wheel 11 so that, each time the spring-loaded pinion 8 is disengaged from the ratchet wheel to permit another pivotal movement of the handle 7 to cause a rectilinearly movable jaw 2 to move towards the pivotally mounted jaw 3 to effect the crimping operation, the ratchet wheel rotates in the opposite direction under a reverse force imparted by the ferrule or terminal being crimped, thereby preventing crimping operation of the tool. <IMAGE>
Description
SPECIFICATION
An improved crimping tool
This invention relates to tools for permanently crimping aferruleorterminalofmetal or metal alloy to an elongate electric conductor, for example a flexible electric conductor of an electric cable.
The invention is particularly concerned with a hand-operated crimping tool of known form comprising a body having a pairofjaws which define a conductor-receiving opening and on which a pair of crimping dies positioned within said opening can be detachably mounted, one of which jaws is constrained to move towards or away from the other jaw in a rectilinear direction substantially normal to the longitudinal axis of said opening and the other of which jaws is pivotally mounted on the body about an axis substantially parallel to the longitudinal axis of said opening to enable an elongate electric conductorwith a ferrule orterminal mounted thereon to be positioned within said opening; a ratchet wheel which is rotatably mounted on the body about an axis substantially parallel to the axis of said opening and which can be rotatably driven in increments about its axis by a spring-loaded pinion carried by a handle which is pivotally mounted on the body about an axis substantially parallel to the axis of the ratchet wheel; a cam which is carried by and is eccentrically positioned with respect to the axis of the ratchet wheel and which, when the ratchet wheel is rotatably driven relative to the body, operatively engages said one ofthejawsto urgethe jaw in said rectilinear direction towards the pivotally mounted jaw; a spring-loaded pawl which is urged into engagement with the ratchet wheel and which, each time the spring-loaded pinion is disengaged from the ratchet wheel to permit another pivotal movement of the handle, prevents the ratchet wheel from rotating in a direction opposite to that in which it is rotatably driven by the spring-loaded pinion under a reverse force imparted by a ferrule or terminal being crimped to an elongate electric conductor positioned in said opening; and, for detachably locking the pivotally mounted jaw to the body when an electric conductor with a ferrule or terminal mounted thereon is positioned within said opening, a latch which is pivotally mounted on the body about an axis substantially parallel tothe longitudinal axis of said opening.Ahand-operated crimping tool ofthis kind will, for convenience, hereinafter be referred to as a "hand-operated crimping tool of the kind described".
We have found that a hand-operated crimping tool ofthe kind described has the serious disadvantage that the tool can be operated when the latch has not effectively locked the pivotal Iy mounted jaw to the body. Even after effecting a single crimp with the pivotally mounted jaw not effectively locked to the body by the latch,we have found that such damage is effected to one or each ofthe inter-engaging surfaces of the latch and pivotally-mounted jaw and/orto the rectilinearly movable jaw that the tool becomes completely unusable.
It is an object of the present invention to provide an improved hand-operated crimping tool of the kind described which is of such a construction that risk of operation ofthetool with the pivotally mounted jaw not effectively locked to the body of the tool by the latch is substantially eliminated.
According to the invention, in the improved hand-operated crimping tool of the kind described the latch is operatively coupled to the spring-loaded pawl via a lever pivotally mounted on the body about an axis substantially parallel to the pivotal axis ofthe latch, the arrangement being such that, when the pivotal ly-mou nted jaw is effectively locked to the body by the latch, the spring-loaded pawl engages the ratchet wheel and that, when the pivotally mounted jaw is not effectively locked to the body by the latch, the lever pivots to disengage the spring-loaded pawl from the ratchet wheel so that, each time the spring-loaded pinion is disengaged from the ratchet wheel to permit another pivotal movement ofthe handle, the ratchet wheel will rotate in said opposite direction under said reverse force imparted by a ferrule or terminal being crimped, thereby preventing crimping operation of thetool.
In orderthatthe pivotal axis ofthe lever can be adjusted with respect to the body to accommodate any tolerances orvariations in the dimensions of the latch and spring-loaded pawl, preferably the lever has a throughbore in which is detachably secured a separately formed tubular pivot pin of circular external cross-section whose bore of circular cross-section is eccentrically located within the pin, the eccentric bore of the pivot pin being engaged by a boss or bosses mounted on the body. Limited adjustment of the pivotal axis ofthe lever with respect to the body can be effected by rotating the tubular pivot pin within the throughbore with respect to the lever and iocking the tubular pivot pin with respect to the lever, e.g. by a grub screw, at any desired position.
The invention is further illustrated by a description, byway of example, of the preferred hand-operated crimping tool with reference to the accompanying drawing which shows a sideviewof the tool with one cover plate of the body ofthetool removed to reveal the operating components of the tool.
Referring to the drawing, the preferred hand-operated crimping tool comprises a body 1 which has a pair of jaws 2,3 which define a conductor-receiving opening 4and on which a pair of crimping dies (not shown) positioned within said opening can be detachably mounted. The jaw 2 is constrained to move towards or away from the jaw3 in a rectilinear direction substantially normal to the longitudinal axis ofthe opening 4 and the jaw 3 is pivotally mounted on the body 1 about an axis parallel to the longitudinal axis of the opening to enable an elongate electric conductor with a ferrule orterminal mounted thereon to be positioned within the opening.At the end ofthe elongate body 1 remote from the pair of jaws 2,3 is an elongate handle 6 which is fixed with respect to the body and an elongate handle 7 which is pivotally mounted on the body about an axis parallel to the axis ofthe opening 4 and which carries a pinion 8 controlled by a coil spring 9 housed within the handle 7. A ratchet wheel 11 is rotatably mounted on the elongate body 1 aboutan axis parallel totheaxis ofthe opening 4 and can be rotatably driven in increments about its axis by the spring-loaded pinion 8 carried by the handle 7 by appropriate pivotal movement of the handle with respectto the body.The ratchet wheel 11 carries a cam 12 which is eccentrically positioned with respectto the axis ofthe ratchet wheel and which, when the ratchet wheel is rotatably driven relative to the body 1, operatively engages the jaw2 to urge the jaw in said rectilinear direction towards the pivotally mounted jaw 3. Urged into engagement with the ratchet wheel 11 by a coil spring 15 is a pawl 14which, each time the spring-loaded pinion 8 is disengaged from the ratchet wheel to permit another pivotal movementofthe handle prior to rotatably driving the ratchet wheel to effect a crimping operation, prevents the ratchet wheel from rotating in a direction opposite to that in which it is rotatably driven bythespring-loaded pinion under a reverse force imparted by a ferrule or terminal being crimped to an elongate electric conductor positioned in the opening 4.The pivotally mounted jaw 3 can be detachably locked to the elongate body 1 whenthe electric conductorwith a ferrule or terminal mounted thereon is positioned within the opening 4 by a latch 17 which is pivotally mounted on the body 1 about an axis parallel to the longitudinal axis ofthe opening 4.
The latch 17 is operatively coupled to the spring-loaded pawl 14via a lever 19which is pivotally mounted on the body 1 about an axis parallel to the pivotal axis of the latch and which, at its end remote from the latch, is bent to form a lip 20 which engages a shoulder 21 on the pawl and, at its end adjacentthe latch, is benttoform afinger22 which engages behind a lip 18 on the latch.
To accommodate anytolerances or variations in the dimensions ofthe latch 17 and spring-loaded pawl 14,the lever 19 hasathroughbore inwhich is detachably secured a separately formed tubular pivot pin 24 of circular external cross-section whose bore of circular cross-section is eccentrically located within the pin, the eccentric bore of the pivot pin being engaged by a stud 25 extending between the cover plates ofthe body 1. Limited adjustment ofthe pivotal axis ofthe lever 19with respect to the body 1 can be effected by rotating the tubular pivot pin 24 within the throughbore with respect to the lever and locking the tubular pivot pin with respect to the lever by a grub screw 26 at any desired position.
When the pivotallymountedjaw3 is effectively locked to the elongate body 1 by the latch 17,the spring-loaded pawl 14engagesthe ratchetwheel 11 so that, each time the spring-loaded pinion 8 is disengaged from the ratchet wheel to permitanother pivotal movement ofthe hand tool 7, the pawl will preventthe ratchet wheel from rotating in a direction opposite to that in which it is rotatably driven bythe spring-loaded pinion under a reverse force imparted by a ferrule orterminal being crimped to an elongate electric conductor positioned in the opening 4.When the pivotally mounted jaw is not effectively locked to the elongate body 1 bythe latch 17,the lip 18on the latch bears against the finger 22 on the lever 19 to cause the leverto pivot in such a rotational direction thatthe lip 20 engaging the shoulder 21 on the pawl causes the pawl to disengage from the ratchetwheel 11. As a consequence, each time the spring-loaded pinion 8 is disengaged from the ratchet wheel 11 to permit another pivotal movement of the handle 7, the ratchet wheel will rotate in a direction opposite to that in which it is rotatably driven bythe spring-loaded pinion by the reverse force imparted by a ferrule orterminal being crimped to an elongate electric conductor positioned in the opening, thereby preventing crimping operation ofthetool and consequential damage to one or each of the inter-engaging surfaces of the latch 17 and pivotally mounted jaw 3 and/or to the rectilinearly movable jaw2.
Claims (3)
1. A hand-operated crimping tool comprising a body having a pair of jaws which define a conductor-receiving opening and on which a pair of crimping dies positioned within said opening can be detachably mounted, one of which jaws is constrained to movetowards orawayfrom the other jaw in a rectilinear direction substantially normal to the longitudinal axis of said opening and the other of which jaws is pivotally mounted on the body about an axis substantially parallel to the longitudinal axis of said opening to enable an elongate electric conductor with a ferrule orterminal mounted thereon to be positionedwithinsaid opening; a ratchet wheel which is rotatably mounted on the body about an axis substantially parallel to the axis of said opening and which can be rotatably driven in increments about its axis by a spring loaded pinion carried by a handle which is pivotally mounted on the body about an axis substantially parallel to the axis of the ratchet wheel; a cam which is carried by and is eccentrically positioned with respectto the axis of the ratchet wheel and which, when the ratchet wheel is rotatably driven relative to the body, operatively engages said one of the jaws to urge the jaw in said rectilinear direction towards the pivotally mounted jaw; a spring-loaded pawl which is urged into engagement with the ratchet wheel and which, each time the spring-loaded pinion is disengaged from the ratchet wheel to permit another pivotal movement of the handle, prevents the ratchet wheel from rotating in a direction opposite to that in which it is rotatably driven by the spring-loaded pinion under a reverse force imparted by a ferrule or terminal being crimped to an elongate electric conductor positioned in said opening; and,for detachably locking the pivotally mounted jawto the body when an electric conductor with a ferrule or terminal mounted thereon is positioned within said opening, a latch which is pivotally mounted on the body about an axis substantially parallel to the longitudinal axis of said opening, wherein the latch is operatively coupled to the spring-ioaded pawl via a lever pivotally mounted on the body about an axis substantially parallel to the pivotal axis of the latch, the arrangement being such that, when the pivotally mounted jaw is effectively locked to the body by the latch, the spring-loaded pawl engages the ratchet wheel and that, when the pivotally mounted jaw is not effectively locked to the body by the latch, the lever pivots to disengage the spring-loaded pawl from the ratchet wheel so that, each time the spring-loaded pinion is disengaged from the ratchet wheel to permit another pivotal movement ofthe handle, the ratchet wheel will rotate in said opposite direction under said reverse force imparted bya ferrule or terminal being crimped, thereby preventing crimping operation ofthetool.
2. A hand-operated crimping tool as claimed in
Claim 1,whereinthe lever hasathroughbore in which is detachably secured a separately formed tubular pivot pin of circular external cross-section whose bore of circular cross-section is eccentrically located within the pin, the eccentric bore of the pivot pin being engaged by a boss or bosses mounted on the body.
3. A hand-operated crimping tool substantially as hereinbefore described with reference to and as shown in the accompanying drawing.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB868602106A GB8602106D0 (en) | 1986-01-29 | 1986-01-29 | Crimping tool |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8701985D0 GB8701985D0 (en) | 1987-03-04 |
| GB2185706A true GB2185706A (en) | 1987-07-29 |
| GB2185706B GB2185706B (en) | 1989-02-01 |
Family
ID=10592114
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB868602106A Pending GB8602106D0 (en) | 1986-01-29 | 1986-01-29 | Crimping tool |
| GB08701985A Expired GB2185706B (en) | 1986-01-29 | 1987-01-29 | An improved crimping tool |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB868602106A Pending GB8602106D0 (en) | 1986-01-29 | 1986-01-29 | Crimping tool |
Country Status (1)
| Country | Link |
|---|---|
| GB (2) | GB8602106D0 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5214832A (en) * | 1991-04-29 | 1993-06-01 | Bergen Cable Technologies, Inc. | Hand tool for applying a ferrule to a safety cable |
| US5305511A (en) * | 1991-04-29 | 1994-04-26 | Bergen Cable Technologies, Inc. | Hand tool for applying a motion stop ferrule to a safety cable |
| GB2284781A (en) * | 1993-12-15 | 1995-06-21 | Zb New Products Ltd | Crimping tool |
| GB2291616A (en) * | 1994-07-23 | 1996-01-31 | Zdzislaw Bieganski | Crimping tool |
| EP0924817A2 (en) * | 1997-12-16 | 1999-06-23 | Fred Schmitt | Pliers for crimping, jaw for said pliers and method for handling such pliers |
| JP2012227145A (en) * | 2011-04-15 | 2012-11-15 | Pressmaster Ab | Hand operated crimping tool |
| US9083133B2 (en) | 2011-04-15 | 2015-07-14 | Pressmaster Ab | Hand operated crimping tool |
-
1986
- 1986-01-29 GB GB868602106A patent/GB8602106D0/en active Pending
-
1987
- 1987-01-29 GB GB08701985A patent/GB2185706B/en not_active Expired
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5214832A (en) * | 1991-04-29 | 1993-06-01 | Bergen Cable Technologies, Inc. | Hand tool for applying a ferrule to a safety cable |
| WO1993023208A1 (en) * | 1991-04-29 | 1993-11-25 | Bergen Cable Technologies, Inc. | Hand tool for applying a ferrule to a safety cable |
| US5305511A (en) * | 1991-04-29 | 1994-04-26 | Bergen Cable Technologies, Inc. | Hand tool for applying a motion stop ferrule to a safety cable |
| GB2284781A (en) * | 1993-12-15 | 1995-06-21 | Zb New Products Ltd | Crimping tool |
| GB2284781B (en) * | 1993-12-15 | 1997-04-16 | Zb New Products Ltd | Crimping tools |
| GB2291616A (en) * | 1994-07-23 | 1996-01-31 | Zdzislaw Bieganski | Crimping tool |
| EP0924817A2 (en) * | 1997-12-16 | 1999-06-23 | Fred Schmitt | Pliers for crimping, jaw for said pliers and method for handling such pliers |
| EP0924817A3 (en) * | 1997-12-16 | 1999-12-15 | Fred Schmitt | Pliers for crimping, jaw for said pliers and method for handling such pliers |
| JP2012227145A (en) * | 2011-04-15 | 2012-11-15 | Pressmaster Ab | Hand operated crimping tool |
| US9083133B2 (en) | 2011-04-15 | 2015-07-14 | Pressmaster Ab | Hand operated crimping tool |
| US9184548B2 (en) | 2011-04-15 | 2015-11-10 | Pressmaster Ab | Hand operated crimping tool |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2185706B (en) | 1989-02-01 |
| GB8602106D0 (en) | 1986-03-05 |
| GB8701985D0 (en) | 1987-03-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19930129 |