US2692384A

US2692384A - Magazine hand tool

Info

Publication number: US2692384A
Application number: US177582A
Authority: US
Inventors: Pollock S Wilson
Original assignee: Aircraft Marine Products Inc
Current assignee: TE Connectivity Corp
Priority date: 1950-08-04
Filing date: 1950-08-04
Publication date: 1954-10-19
Anticipated expiration: 1971-10-19

Description

Oct. 26, 1954 5 w PQLLQCK 2,692,384

MAGAZINE HAND TOOL Filed Aug. 4, 1950 3 Sheets-Sheet l 75 INVENTOR I02 [04 WZ'Zson Pollock ATTOR S Och 1954 s. w. POLLOCK MAGAZINE HAND TOOL 3 Sheets-Sheet 2 Filed Aug. 4, 1950 INVENTOR 1S. WYlson P011001:

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1954 s. w. POLLOCK ,384

MAGAZINE HAND TOOL Filed Aug. 4, 1950 3 Sheets-Sheet 3 INVENTOR SJ m lsan Pollock m 'iidhlr' 'ATTO Patented Oct. 26, 1954 UFFICE MAGAZINE HAND TOOL S. Wilson Pollock, Camp Hill, Pa, assignor to Aircraft-Marine Products Ina, Harrisburg, Pa., a corporation of New Jersey Application August 4, 1950, Serial No. 177,582

This invention relates to hand held and controlled, but preferably power operated, tools for applying terminals or the like to wires and it has for its general object the provision of means for automatically feeding the terminals or other elements which are to be crimped upon the wire ends successively into crimping and wire end receiving position between the crimping jaws of such tools.

In the operation of tools of the type to which the invention relates, the tool is usually held in one hand and the other hand is used to place the wire, upon which the terminal or other ele ment is to be crimped, in position to have the terminal crimped thereon, the terminal being first placed in position between the jaws and the wire end being inserted in the ferrule part of the terminal preparatory to crimping. The use of one hand to hold and actuate the tool and of the other to place the successive wires in terminal-receiving position in the tool makes it important, for rapid operation, that means be provided for automatically feeding successive terminals into crimping position between the crimping jaws of the tool.

A particular object of the invention is to provide improved means for this purpose which is itself simple construction and certain in operation and which does not complicate the construction or operation of the tool.

Other objects, advantages and important features of the invention to which reference has not hereinabove specifically been made will appear hereinafter when the following description and claims are considered in connection with the accompanying drawings, in which Figure 1 is a side elevation of a hand tool embodying the present invention, this view being of the right hand side of the tool as it is held in the operators hand, this view showing the tool with the housing on the right hand side re moved;

Figure 2 is a side elevation of the left hand side of the crimping and terminal feeding parts of the tool;

Figure 3 is a front elevation of the parts shown in Figure 2;

Figure 4 is a perspective view looking down upon the crimping mechanism and terminal feeding mechanism from the left;

Figure 5 is a perspective view of the parts shown in Figure 4 looking down upon them from the right;

Figure 6 is a horizontal section on the line 6-6 of Figure 3;

5 Claims. (Cl. 1--177) Figure 7 is a vertical section on the line l-! of Figure 6, and

Figure 8 is a horizontal sectional detail showing the operation of the pawl slide operating cam.

In the illustrative embodiment the tool is shown as constructed for pneumatic operation, the operating means comprising a cylinder 2 of such diameter that it will fit comfortably with in the hand of the operator, this cylinder being carried at the lower end of a frame structure comprising side frame members t having vertical guideways 6 therein for slide rollers 8 on a transverse shaft it! carried by a piston rod [2 connected to a piston Hl in the cylinder 2. Also pivoted upon the shaft IE3, between the ears 16 on the upper end of the piston rod i2, is a link it pivoted between ears at the forked lower end of an arm 253 connected to and forming a part of one member of a jaw-closing toggle, the arm 23 being pivotally connected at 222 to the lower crimping jaw lever 26 and being connected to the upper crimping jaw lever 32 by a link 26 extending between a pivot 28 on the arm 23 and a pivot 38 on said upper crimping jaw lever 32. The crimping jaw lever is is fulcrumed at 34 between bracket members 36 connected to the front ends of the side frame members l and the upper crimping jaw lever 32 is fulcrumed at 38 between said bracket members 35. From the foregoing description it will be seen that when the piston. M is moved upwardly by the introduction of compressed air below it in the cylinder 2 the upward movement of the piston rod l2 will act through the link it and arm 2% to straighten the toggle made up of the links connecting the pivots 23 and tit and by thus straightening this toggle cause the crimping jaws id and 42 to be brought into crimping re" lation to each other.

Control of the introduction of the compressed air into the cylinder 2 behind the piston it is eifeoted through a valve mechanism operated by a trigge" 44 arranged to be engaged by the forefinger of the operator holding the hand tool.

The trigger M is fulcrumed at 45 and comprises a bellcrank lever, the arm 58 of which has a fork 5Q thereon arranged to engage the upper face of a nut 532 on a valve plunger 5 held in its upper or closed valve condition by a spring 55. Within the valve housing 58 is valve mechanism which may be of the type more fully shown and described in the copending application of Thomas C. Freedom, Serial No. 769,381, filed August 19, 1947, see Figure 2 of the drawings of said application. The valve mechanism in the housing 58 controls the flow of air from an outside source of compressed air through any suitable connections to the valve housing, such as the hose nipple 69, to the cylinder 2, the valve housing being connected by a tube 62 to the bottom of the cylinder 2 so that opening of the valve connecting the compressed air intake '60 with the tube 62, by the depression of the plunger 54, will cause the introduction of compressed air below the piston M.

The mechanism so far described is substantially the same as that shown in Figure 2 of the drawings of said copending application of Thomas C. Freedom hereinabove identified.

As hereinabove suggested, the present invention relates particularly to the provision in a tool, of the class described in said copending application of Thomas C. Freedom, of means for automatically feeding the terminals or other elements to be crimped upon the wire ends into crimping position between the crimping

jaws

40 and 42. In the illustrative embodiment of the invention advantage is taken of the substantially straight line movement of the knee pivot 28 of the jaw closing toggle to effect the movement in one direction of a feed slide designed to effect the step by step feeding of the terminals into crimping position between the crimping jaws of the tool, the movement of the feed slide in the other direction being effected by a spring tensioned by the first-mentioned slide movement. As herein shown the terminals 64, which are to be successively brought into crimping position between the crimping jaws ti} and 42, are of approximately U-shape and are connected together by short integral connecting strips 66 so that a continuous strip of terminals is provided to be acted upon by the feeding mechanism.

The left hand bracket 36 of the frame structure is shown as provided with a thickened portion 58 which extends forward and is provided with a groove to receive a channel l2 serving as a guide for the strip of terminals fi l. This channel 12 extends to a point flush with the side faces of the crimping jaws 4E and 42. Carried by a stem 6? fitted in a slot in the thickened part 68 of the left hand bracket member 36 is a guide blade M, preferably of hardened steel, which extends down into the channel 12 and into the inside of the U of the terminal strip so that during the last part of its feeding movement the strip is positively guided both. on its outside and on its inside. The end of the guide blade "M- is also flush with the side faces of the crimping jaws and being of substantially the width of the connecting portions 66 of the strip it acts with the lower crimping jaw 48 to shear off this connection as the crimping operation takes place.

Mounted upon the guide channel 72 to slide thereon is a pawl carrying feed slide 16, the sides of the slide 16 being grooved as shown at '58 so that the slide 16 is positively guided and supported on the strip channel 12. The sides of the slide 16 are also provided with

upstanding ears

80 and 82. A feed pawl 84 is pivoted on a pivot pin 86 extending through the cars 86 and a spring 88, connected at one end to a short stud 90 on the pawl 84 and at its other end to a pin 92 extending between the ears 82, tends to rock the pawl 84 into engagement with the strip of terminal 64 in the channel 72. The spring 88 is a relatively light spring so that 4 when the slide is moved outward along the channel 12 the pawl 88 will ride lightly over the upper edges of the terminals 64.

A spring 94, connected at one end to an car 56 screwed to the enlarged part 68 of the bracket 36 through the stem 6'5 of the guide blade M and at its other end to a screw 98 in the slide l6, tends to hold the slide in its stopped position against the side of the enlargement 88 of the bracket 36. This spring is strong enough to insure feeding of the terminal strip when the slide, is moved back to a new feeding position and is then released to move forward again.

As hereinabove suggested, the movement of the slide outward along the channel l2 into a new feeding position is brought about by connections to the knee pivot 28 of the jaw closing toggle since this pivot makes a straight line movement, during the jaw-closing operation, forward from its open jaw position to its closed jaw position. The mechanism for utilizing this movement of the knee pivot 28 to eifect the movement of the slide l6 into position tobring the pawl 88 behind the next terminal lie of the terminal strip comprises a'slieet metal slide I90 arranged to slide in a guideway IE2 provided in a plate I04 attached to the under side of the feed slide l6. This guideway IE2 is open on its side toward the jaws so that the inner edge of the cam slide mil can ride over the side face of the enlargement 68 of the left hand bracket 36 and thus, by engaging the bevel edge We on the guideway 32, force the slide E8 to travel out along the channel ?2 until the pawl 84 has moved into position behind the next terminal 64 of the terminal strip. The cam slide Hill is provided with an arm m8 connected to the knee pivot 28 of the jaw closing toggle so that whenever the toggle is moved to jaw closing position the slide IE0 is moved forward to effect the movement of the feed slide 16 into its next feeding position. When the crimping action has been completed and the toggle knee pivot 28 moves back to its open jaw position the slide H10 moves backward with it and thus releases the feed slide 1 5 which is carried forward by the spring 94 until it is stopped against the side of the enlargement $8 of the bracket 36, at which time it has completed the feeding of the next terminal fi l, into crimping position between the jaws 41) and 42. To prevent the dragging of the pawl over the successive terminals from tending to move the terminal strip backward in the channel 12 a drag spring W3 is located on the side of the channel in such manner that it projects over the side wall of the channel, the nose of this spring entering the space between successive terminals to exert a retarding action against any tendency of the terminal strip to move back under the action of the pawl drag.

I claim:

1. In a tool of the class described, the combination with crimping jaws, a support therefor and means for bringing said jaws into crimping relation to each other, of means for successively feeding terminals to be crimped upon wire ends into crimping position between. said jaws,-said means comprising a relatively short guide of light construction and secured at one end only to I the jaw support at one side of said jaws for guiding a strip of connected terminals therebetween, a strip-engaging pawl and a slide carrier therefor interengaged with, slidable onand entirely supported by said guide, said pawl carrier being yieldingly held at one end of its terminal-length path of travel, and means connected to and actuated by the jaw operating mechanism for positively moving said pawl carrier to the other end of said path of travel.

2. A tool according to claim 1 in which crimping jaw levers are connected by a toggle linkage by which the opening and closing movements of the jaws are efiected and in which a cam slide connected to the knee joint of said toggle and having its free end supported by the pawl carrier efiects the positive movement of the pawl carrier along the strip guide in one direction.

3. In a tool of the class described, the combination with crimping jaws, a support therefor and means for moving said jaws into and out of crimping relation to each other, of terminal strip feeding means comprising a strip guide rigidly secured at one end to the jaw support in position to guide a strip of terminals between the jaws, a 20 and supported at its other end by the slide for moving the slide positively against the spring to the other limit of its reciprocating movement.

4. A tool according to claim 3 in which crimping jaw levers have therebetween a toggle linkage by which the opening and closingmovements of the jaws are efiected and a cam slide, connected at one end to the knee joint of the toggle has a cam at its free end that is supported by and effects the movement of the pawl-carrying slide against the spring that urges it to one limit of its movement.

5. A tool according to claim 1 in which the pawl-carrying slide has its strip feeding movement limited by the jaw support in close proximity to the point of the crimping action of said jaws and in which the slide moving means is itself arranged to move transversely to the terminal guide and parallel to the plane of the crimping movement of the jaws.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 25 1,836,497 Phelps Dec. 15, 1931 2,024,416 Allison et a1 Dec. 17, 1935 2,208,819 Smith July 23, 1940