US2618993A - Connector forming tool with ratchet means for compelling precise operation - Google Patents

Connector forming tool with ratchet means for compelling precise operation Download PDF

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Publication number
US2618993A
US2618993A US2261A US226148A US2618993A US 2618993 A US2618993 A US 2618993A US 2261 A US2261 A US 2261A US 226148 A US226148 A US 226148A US 2618993 A US2618993 A US 2618993A
Authority
US
United States
Prior art keywords
ratchet
pawl
levers
dies
crimping
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 - Lifetime
Application number
US2261A
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English (en)
Inventor
Vernon E Carlson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TE Connectivity Corp
Original Assignee
Aircraft Marine Products Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to CA480041A priority Critical patent/CA480041A/en
Priority to BE527460D priority patent/BE527460A/xx
Application filed by Aircraft Marine Products Inc filed Critical Aircraft Marine Products Inc
Priority to US2261A priority patent/US2618993A/en
Priority to GB849/49A priority patent/GB661192A/en
Application granted granted Critical
Publication of US2618993A publication Critical patent/US2618993A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

Definitions

  • a commonly used type of hand tool for attaching electrical connectors to Wires includes opposed crimping dies mounted on jaws at end portions of spring pressed cooperating lever grips
  • the ferrule or wire-embracing portion of a connector is positioned to embrace an end portion of the wire; and this assembly is brought into position with said ferrule between said crimping dies.
  • Manually applied closing pressure on the grips or handle levers causes the jaws to close and the dies to engage and compress the ferrule into se-
  • Such crimping is a precision operation in which both the dies and the connector units to be crimped therein are held to very close tolerances. Unless the jaws are closed together to an accurately predetermined position, the advantage of such precision is lost and the connection between the connector and the wire may be less secure and electrically less perfect than is required. This can result either in rejection of the work on inspection or failure in use.
  • a further object of the invention has therefore been to provide a crimper which incorporates a ratchet device whereby the crimping dies may be held in an initial position resulting before effective crimping.
  • Figure l is a plan view of a hand operated tool equipped with dies for crimping solderless electrical connectors on portions of electric wires or conductors; the closed position being shown in full lines and a partially opened position of the handles being indicated by the dot-dash lines;
  • FIG. 2 an enlarged fragmentary detail illustrating relative positions of the pawl and ratchet occurring during return movement of the handle levers 0r grips toward open or inoperative position;
  • FIG. 3 an enlarged fragmentary detail illustrating relative positions of the pawl and ratchet occurring when the handle levers or grips have reached full open position and started a closing movement;
  • Figure 5 a detail view in section on the line 55 of Figure l;
  • FIG. 6 a fragmentary detail view, partly in section, on the line 6o of Figure 5;
  • Figure 7 a fragmentary view partly in vertical section illustrating a portion of a modification wherein the pawl carrier is adjustably mounted in relation to the ratchet;
  • the hand operated crimping tool shown in Figure 1 comprises a pair of handle grips in the form of grip levers 9 and It pivoted at H and normally biased toward open or spread position by a spring l2.
  • the grip levers 9 and I0 are approximately ten inches long, for
  • these handles are designed with resiliency, to give to movement at their outer ends by a normal mans grip after the dies are fully closed.
  • These handles as shown are made by die forming them with a generally U-shaped cross-section from sheet steel of about 0.05 inch thickness, or in such manner that when the dies are closed one against the other, further compression applied to the grip levers will cause one or both of them to yieldingly bend for a purpose and under circumstances to be described.
  • Jaw lever I5 is pivoted at II to said grip lever 9; and jaw lever 16 is pivoted at 18 to the other grip lever I0.
  • Said jaw levers l5 and J6 are mounted to rock on pivots I9 which-are carriedby tie plates 2
  • Other details of construction and the mode of operation-of one form of tool having structural features above described are set forth in my U. S. Patent No. 2,359,083.
  • the other end of said rod is also screw threaded and adjustably engages a threaded socket in bracket 28 pivoted to said grip lever 9 at 29.
  • a set screw 30 or equivalent locking device is engaged with said rod and bracket 28 to hold the ratchet rod in a predetermined position of adjustment in relation to said bracket 28.
  • the adjustment thus secured is such that with the ratchet accurately adjusted so that the free end of pawl 25 engages the last tooth at the inner end of ratchet 23 (as indicated in the short dash lines on Figure 4) when the grip levers 9 and I0 have been pressed together to the position of maximum required crimping for the particular connection being formed, and pawl 25 will disengage said last tooth on said ratchet and swing into groove 24 only when said grip levers are resiliently sprung past said position of complete crimping. Pawl 25 will be disengaged from the outer end of said ratchet 23 when said grip levers 9 and ID are extended beyond their position Where initial engagement of the connector occurs.
  • Said housing 2'! forms part of, or is mounted on, a pawl carrier, shown as a tube 31 open at its inner end and with its other or outer end pivoted at .32 to grip lever 10.
  • the innerend ofsaid ratchet rod which has the ratchet 23 extends into the open end of tube 3
  • the grip levers 9 and H! are brought to closed position and additionally compressed, as described, the resulting relative endwise movement between the ratchet 23 and pawl carrier 3
  • the handles 9 and I9 are moved apart to open the tool, the pawl is tilted over the ratchet as shown in Figure 2, and when the handles are moved toward one another the pawl is tilted as shown in Figures 3 and 4.
  • the device above described provides one embodiment of means whereby a hand tool may be conveniently adjusted and calibrated for use in producing uniformly effective joining or bonding of various sizes and types of electrical connectors to different gauges and kinds of wires.
  • a hand tool may be conveniently adjusted and calibrated for use in producing uniformly effective joining or bonding of various sizes and types of electrical connectors to different gauges and kinds of wires.
  • For factory calibration of tools if, as shown, there is a stop on the dies which must be closed, e. g., as shown at 36, to give the required precision crimping, adjustment is made at this position.
  • a templet or calibrating gauge is prepared having the precise size and shape of a completed crimp on a given type of connector With a given type of wire.
  • This gauge is placed between the dies [3 and I4 and the grip levers are compressed to move their free end portions one toward the other. If, when the dies 13 and I4 first grip the gauge so that it cannot be moved in the dies. the pawl 25 is beyond the last tooth on the ratchet 23, i. e., beyond the relative position as shown in short dash lines in Figure 4, the adjustment is too loose. When at this stage of the closing the pawl 25 is on or very near the last ridge of the ratchet 23, e.
  • grip levers 9 and 13 are opened, for example by spring l2, from the closed position, Figure 1.
  • This produces relative endwise outward movement of said pawl 25 and said ratchet 23, during which pawl 25 rides over teeth 23 and is yieldingly tilted in the direction shown in Figure 2.
  • pawl 25 disengages the outer end of said ratchet 23 and returns to normal position by operation of spring 26.
  • the operator may see that the ferrule and the dies are not in proper relation or that some other condition exists which might prevent making an acceptable joining.
  • the necessary adjustment may require using both hands.
  • the initial or light gripping effect of the tool may be retained when hand pressure is relaxed, or even if the tool is laid down.
  • the operator has pressed the grip levers 9 and [0 as far toward each other as he can on the initial grip, but the amount of crimping so produced is insufl'icient. He can then take a fresh hold and exert the needed additional pressure to complete a satisfactory crimp.
  • a tool for crimping and the like comprising, levers pivoted together, dies connected to the levers and movable thereby to and from a closed crimping position, stops engaging to prevent further relative movement of the dies after closure to crimping position, said levers having a range of deflection such that their movement toward one another can slightly exceed the relative pivotal movement necessary to close the dies to crimping position, a reversible pawl assembly pivotally connected to one of said levers, a coacting ratchet assembly pivotally connected to the other, the effective length of the ratchet being equal to the sum of the magnitude of the pivotal movement of the levers and the deflection movement of the levers in the die closing direction so that the ratchet overruns the pawl after engagement of the stops and after deflection of the levers to permit the levers to be opened again.
  • a tool for crimping and the like comprising dies, levers pivoted together and connected to said dies to urge the same to and from a closed crimping position, stops mutually engaging to prevent further relative movement of the dies after closure to crimping position, said levers having a range of deflection such that their movement toward one another can slightly exceed the relative pivotal movement necessary to close the dies and engage the stops, a, housing pivotally connected to one of said levers at a point remote from the point of pivotal connection of the levers, a reversible pawl mounted within said housing, a coacting ratchet assembly connected to the other of said levers at a point adjacent the pivotal connection of the two levers, said ratchet assembly sliding within said housing in coacting relation to said pawl, the length of the ratchet being equal to the sum of the magnitude of the pivotal movement of the levers and the deflection movement of the levers in the closing direction so that the ratchet overruns the pawl after closure

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
  • Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
US2261A 1948-01-14 1948-01-14 Connector forming tool with ratchet means for compelling precise operation Expired - Lifetime US2618993A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CA480041A CA480041A (en) 1948-01-14 Tool
BE527460D BE527460A (xx) 1948-01-14
US2261A US2618993A (en) 1948-01-14 1948-01-14 Connector forming tool with ratchet means for compelling precise operation
GB849/49A GB661192A (en) 1948-01-14 1949-01-12 Crimping tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US2261A US2618993A (en) 1948-01-14 1948-01-14 Connector forming tool with ratchet means for compelling precise operation

Publications (1)

Publication Number Publication Date
US2618993A true US2618993A (en) 1952-11-25

Family

ID=21699948

Family Applications (1)

Application Number Title Priority Date Filing Date
US2261A Expired - Lifetime US2618993A (en) 1948-01-14 1948-01-14 Connector forming tool with ratchet means for compelling precise operation

Country Status (4)

Country Link
US (1) US2618993A (xx)
BE (1) BE527460A (xx)
CA (1) CA480041A (xx)
GB (1) GB661192A (xx)

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2696747A (en) * 1951-10-02 1954-12-14 Thomas & Betts Corp Toggle-actuated crimping tool with full-stroke compelling mechanism
US2722146A (en) * 1952-08-25 1955-11-01 Aircraft Marine Prod Inc Semi-automatic crimping tool
US2737071A (en) * 1953-09-18 1956-03-06 Burndy Engineering Co Inc Tool with full stroke compelling tubular ratchet mechanism
US2737070A (en) * 1953-09-18 1956-03-06 Burndy Engineering Co Inc Tool with full stroke compelling ratchet mechanism
US2777345A (en) * 1953-04-22 1957-01-15 Aircraft Marine Prod Inc Magazine-type hand tool for crimping electrical connectors
US2861488A (en) * 1956-01-17 1958-11-25 Kelsey Hayes Co Ratchet powered tool
US2861489A (en) * 1956-01-30 1958-11-25 Kelsey Hayes Co Pivot lever retainer for ratchet powered device
US2916953A (en) * 1957-08-19 1959-12-15 Amp Inc Hand crimping tool
US2933000A (en) * 1957-12-27 1960-04-19 Gen Dynamics Corp Crimping tool
US2959993A (en) * 1959-07-01 1960-11-15 Vibro Mfg Co Inc Compressing tool with release means for the full stroke compelling mechanism
US3039337A (en) * 1959-04-27 1962-06-19 Amp Inc Tool for crimping electrical connectors
US3059511A (en) * 1958-08-27 1962-10-23 Gen Dynamics Corp Electrical connector contact crimping tool
US3063313A (en) * 1959-09-29 1962-11-13 Buchanan Electrical Prod Corp Locator controlled crimping tool
US3426355A (en) * 1964-03-11 1969-02-04 Amp Inc Crimping tool having wire severing means
US3527125A (en) * 1968-02-07 1970-09-08 Etc Inc Full stroke compelling mechanism
US4158302A (en) * 1977-12-23 1979-06-19 Thomas & Betts Corporation Tool with full-stroke compelling mechanism
US4608888A (en) * 1984-03-28 1986-09-02 Reiner Rommel Plier type tool with motion compelling mechanism
US4640117A (en) * 1984-06-29 1987-02-03 The Bares Group Crimping tool
US4794780A (en) * 1986-04-09 1989-01-03 Wezag Gmbh Werkzeugfabrik Crimper for crimping cable terminals, cable connectors, and similar materials to electric conductors, optical conductors, etc.
EP0396295A2 (en) * 1989-05-03 1990-11-07 The W.E. Bassett Company Pliers or nippers with compound pivot axes
USRE33714E (en) * 1984-06-29 1991-10-15 Crimping tool
DE19742975A1 (de) * 1997-09-30 1999-04-22 Wolf Gmbh Richard Handhabe zur Betätigung eines medizinischen Instrumentes
US20080216548A1 (en) * 2007-03-08 2008-09-11 Steiner Richard A Crimping tool construction with angularly diposed jaw head assembly
US8584503B1 (en) 2012-10-09 2013-11-19 Rostra Tool Company Crimping tool
US20150158151A1 (en) * 2013-11-01 2015-06-11 Curtis Brown Ratchet adjustable locking pliers
US20220134515A1 (en) * 2020-10-31 2022-05-05 Armor Tool Llc Adjustable locking pliers and lock assembly

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2985047A (en) * 1959-03-13 1961-05-23 Cannon Electric Co Tool with cam-actuated jaw closing means

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US884422A (en) * 1907-08-06 1908-04-14 William Schmitt Wrench.
US1110220A (en) * 1914-04-02 1914-09-08 Leander Walter Millsap Jr Wrench.
US1378701A (en) * 1921-05-17 Full-stroke compelling device
US1413453A (en) * 1921-04-12 1922-04-18 John H Brassell Wire looping and coiling tool
US1551328A (en) * 1925-08-25 Pliers
US1568934A (en) * 1924-02-15 1926-01-05 Vera Biedinger Wrench
DE603213C (de) * 1934-09-25 Fritz Falkenstein Dr AErztliche Spritze
US2359083A (en) * 1942-08-17 1944-09-26 Aircraft Marine Prod Inc Tool for making electrical connectors
US2411838A (en) * 1944-02-05 1946-11-26 Aircraft Marine Prod Inc Tool
GB585761A (en) * 1944-10-30 1947-02-24 Ernest Frederick Walter Leede Improvements in interlocking devices for ensuring the complete stroke of an operating member
US2439785A (en) * 1945-02-19 1948-04-13 Waldes Kohinoor Inc Tool for handling open-ended retaining rings
US2454309A (en) * 1945-04-16 1948-11-23 Evan W Davis Bolt holding tool

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1378701A (en) * 1921-05-17 Full-stroke compelling device
US1551328A (en) * 1925-08-25 Pliers
DE603213C (de) * 1934-09-25 Fritz Falkenstein Dr AErztliche Spritze
US884422A (en) * 1907-08-06 1908-04-14 William Schmitt Wrench.
US1110220A (en) * 1914-04-02 1914-09-08 Leander Walter Millsap Jr Wrench.
US1413453A (en) * 1921-04-12 1922-04-18 John H Brassell Wire looping and coiling tool
US1568934A (en) * 1924-02-15 1926-01-05 Vera Biedinger Wrench
US2359083A (en) * 1942-08-17 1944-09-26 Aircraft Marine Prod Inc Tool for making electrical connectors
US2411838A (en) * 1944-02-05 1946-11-26 Aircraft Marine Prod Inc Tool
GB585761A (en) * 1944-10-30 1947-02-24 Ernest Frederick Walter Leede Improvements in interlocking devices for ensuring the complete stroke of an operating member
US2439785A (en) * 1945-02-19 1948-04-13 Waldes Kohinoor Inc Tool for handling open-ended retaining rings
US2454309A (en) * 1945-04-16 1948-11-23 Evan W Davis Bolt holding tool

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2696747A (en) * 1951-10-02 1954-12-14 Thomas & Betts Corp Toggle-actuated crimping tool with full-stroke compelling mechanism
US2722146A (en) * 1952-08-25 1955-11-01 Aircraft Marine Prod Inc Semi-automatic crimping tool
US2777345A (en) * 1953-04-22 1957-01-15 Aircraft Marine Prod Inc Magazine-type hand tool for crimping electrical connectors
US2737071A (en) * 1953-09-18 1956-03-06 Burndy Engineering Co Inc Tool with full stroke compelling tubular ratchet mechanism
US2737070A (en) * 1953-09-18 1956-03-06 Burndy Engineering Co Inc Tool with full stroke compelling ratchet mechanism
US2861488A (en) * 1956-01-17 1958-11-25 Kelsey Hayes Co Ratchet powered tool
US2861489A (en) * 1956-01-30 1958-11-25 Kelsey Hayes Co Pivot lever retainer for ratchet powered device
US2916953A (en) * 1957-08-19 1959-12-15 Amp Inc Hand crimping tool
US2933000A (en) * 1957-12-27 1960-04-19 Gen Dynamics Corp Crimping tool
US3059511A (en) * 1958-08-27 1962-10-23 Gen Dynamics Corp Electrical connector contact crimping tool
US3039337A (en) * 1959-04-27 1962-06-19 Amp Inc Tool for crimping electrical connectors
US2959993A (en) * 1959-07-01 1960-11-15 Vibro Mfg Co Inc Compressing tool with release means for the full stroke compelling mechanism
US3063313A (en) * 1959-09-29 1962-11-13 Buchanan Electrical Prod Corp Locator controlled crimping tool
US3443299A (en) * 1964-03-11 1969-05-13 Amp Inc Apparatus for trimming and connecting wires
US3426355A (en) * 1964-03-11 1969-02-04 Amp Inc Crimping tool having wire severing means
US3527125A (en) * 1968-02-07 1970-09-08 Etc Inc Full stroke compelling mechanism
US4158302A (en) * 1977-12-23 1979-06-19 Thomas & Betts Corporation Tool with full-stroke compelling mechanism
US4608888A (en) * 1984-03-28 1986-09-02 Reiner Rommel Plier type tool with motion compelling mechanism
USRE33714E (en) * 1984-06-29 1991-10-15 Crimping tool
US4640117A (en) * 1984-06-29 1987-02-03 The Bares Group Crimping tool
US4794780A (en) * 1986-04-09 1989-01-03 Wezag Gmbh Werkzeugfabrik Crimper for crimping cable terminals, cable connectors, and similar materials to electric conductors, optical conductors, etc.
EP0396295A2 (en) * 1989-05-03 1990-11-07 The W.E. Bassett Company Pliers or nippers with compound pivot axes
EP0396295A3 (en) * 1989-05-03 1991-09-18 The W.E. Bassett Company Pliers or nippers with compound pivot axes
DE19742975A1 (de) * 1997-09-30 1999-04-22 Wolf Gmbh Richard Handhabe zur Betätigung eines medizinischen Instrumentes
US20080216548A1 (en) * 2007-03-08 2008-09-11 Steiner Richard A Crimping tool construction with angularly diposed jaw head assembly
US8015853B2 (en) 2007-03-08 2011-09-13 Rostra Tool Company Crimping tool construction with angularly disposed jaw head assembly
US8584503B1 (en) 2012-10-09 2013-11-19 Rostra Tool Company Crimping tool
US8726713B2 (en) 2012-10-09 2014-05-20 Rostra Tool Company Crimping tool
US20150158151A1 (en) * 2013-11-01 2015-06-11 Curtis Brown Ratchet adjustable locking pliers
US20220134515A1 (en) * 2020-10-31 2022-05-05 Armor Tool Llc Adjustable locking pliers and lock assembly

Also Published As

Publication number Publication date
GB661192A (en) 1951-11-21
BE527460A (xx)
CA480041A (en) 1952-01-08

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