US2704001A - Connector crimping hand tool - Google Patents

Description

March 15, 1955 J. F. MORSE 2,704,001

CONNECTOR CRIMPING HAND TOOL Filed June 15, 1951 2 Shets-Sheet l FIG. 5 [2o a INVENTOR.

JOHN F. MORSE ATTORNEYS March 15, 1955 J. F. MORSE 2,704,001

CONNECTOR CRIMPING HAND TOOL Filed June 15, 51

ATTORNEYS United States Patent'O CONNECTOR CRIMPING HAND TOOL John F. Morse, Hudson, Ohio Application June 15, 1951, Serial No. 231,782

2 Claims. (Cl. 81-45) The present invention has as its purpose the production of a simple form of hand tool by which a mechanic may readily and accurately unite a wire with an external casing. Specifically, the tool is designed for the purpose of connecting the core or moving element of a control cable with an end fitting. While the tool is designed with the particular object in view of making the specified connection, it may have other uses.

In the drawings and description, the best known and preferred form of the invention is fully set forth but the details therefor may be varied within the scope of the invention as set forth in the appended claims.

In the drawings,

Fig. 1 is a side elevation of the tool with the aws thereof closed.

Fig. 2 is a longitudinal section of the tool as shown ll'l Fig. 1;

Fig. 3 is a similar section, the jaws being opened.

Fig. 4 is a transverse section on the line 44 of Fig. 2, the jaws being opened and the work in position.

Fig. 5 is a plan view of the tool.

The work which is performed by the improved tool 15 the simultaneous staking or deformation of the metal of an end fitting to deform the core of a flexible cable to interlock the core and the end fitting so that there will be no possibility of the core and the fitting loosening or separating. The flexible core, which is of a standard armored type construction, is indicated by the numeral 1 and the rod which constitutes the end fitting by the numeral 2. The end of the fitting is axially bored, as shown at 3, to receive the core, a sight hole 5 being provided so that the mechanic will know that the core is properly seated in the fitting. The staking operation consists in the formation of a plurality of spaced pairs of relatively deep notches 6 in the metal of the end fitting, the notches being on opposite sides of the fitting and all being made at a single stroke of the tool. It is one of the objects and advantages of the tool shown that all of the notches, here shown as six in number, are formed at the same time and uniformly. This insures a perfect connection between the core and the end fitting and prevents any local distortion of the end fitting which might interfere with its operation, it being necessary that the smooth outer surface of the end fitting be preserved. The result is accomplished by the operation of the tool and is further assisted by the fact that the bore 3 is somewhat greater than the external diameter of the core, so that the metal of the fitting which is displaced by the staking operation will flow into the bore and not appear on the outside of the fitting.

The tool comprises a stationary head or housing 10 of general U-shaped section to provide a chamber 11 closed at its outer end but open at its inner end so that the dies may be assembled in the head. The upper and lower walls of the chamber are parallel to receive and guide the movable die. At the sides of the head are located the two side plates 12 and 13, the side plates and the head being held together by the transverse bolts 15. At the inner end of the side plates and beyond the head are located the two bolts 16 which constitute the pivots for the two operating arms 18. On the inside of each arm is a rubber bumper 19 held in place by the pins 20, the bumpers serving to limit. the inward movement of the arms at the end of the staking operation. Between the pivots 16, the adjoining surfaces of the arms are short intermeshing gear segments 22, which insure that the arms move toward and from each other uniformly.

2,704,001 Patented Mar. 15, 1955 Located in the base or outer end of the chamber 11 is the stationary die-25. A replaceable shim 26 may be located between the die and the end wall of the chamber to vary the location of the stationary die so that the tool may be adjusted accurately for the required depth of the indentations 6 and also to correct any minor manufacturing errors. The face of the die is provided with the teeth 23 which form the indentations in one side of the fitting 2. "lhree teeth are shown on the die and this number is preferred, although any number may be used. Opposite the die 25 and slidable in the space provided by the side walls of the chamber 11 and the end plates 12 and 13 is the movable die 30 having on its working face teeth 31 equal in number to the teeth 28 and preferably opposite thereto. In the opposing faces of the two dies are the sockets 34 in which are located the compression springs 35 which tend to separatethe two dies and force the operating arms apart.

The inner ends of the arms 18 are connected to the die 30 by means of two stout compression links 38, the ends of which are rounded and seated in semicircular sockets 39 in the face of the die 30 and similar sockets 40 in the inner ends of the arms 18 near the pivots 16.

It will be seen that a powerful force is exerted on the die 30 upon the inward movement of the arms, driving the two dies together and forcing the teeth into the stock of the end fitting.

In the side plates 12 and 13, and in line with the staking point, are the two registering slots 42 to receive the work piece, the elongation of the slots permitting the work to be moved against the stationary die upon the approach of the dies. On one of the side plates, here shown as the plate 13, is pivoted on pin 44 a swinging stop plate 45 movable over a pin 46 located in a curved slot 47 in the stop plate. When moved to the position shown in Fig. l, the underside of the stop plate rests upon the strand 1 and provides a locating point for the end of the fitting 2. The pin 46 in slot 47 allows limited movement of the plage 451 to the inoperative position shown in dotted lines in 1g.

In operation, the strand or core 1 is cut to the desired length and is inserted in the axial bore of the fitting 2 until the end of the core is visible through the opening 5. The assembly is then inserted in the tool through the openings 42 and the work adjusted in position by lowering the stop plate and moving the end of the fitting against it. Holding the work in position, the operator brings the arms 18 together and the allotted number of indentations are formed in the end fitting. The stop plate is then raised and the work is withdrawn from the tool.

It will be seen that a simple but very efiicient tool has been devised to perform the operation of staking the fitting on the end of the strand, and the joint is properly and accurately formed. The dies are readily accessible for redressing or replacement, it being necessary only to remove the bolts 16 and the arms 18 and the two dies may be taken out of the chamber.

What is claimed is:

l. A staking tool comprising a head having an end wall and parallel side walls, a pair of plates secured to the sides of the head and forming the other side walls of a chamber, a stationary die loosely held in the chamber and resting against the end wall, a movable die in the chamber and having a sliding fit with the side walls thereof, compression spring means between the dies and normally holding the dies with their opposing faces spaced apart to receive the work, said side plates having workadmitting openings in alignment with the space between the opposing faces of said dies, a pair of operating levers, removable pivot pins in the side plates for the levers, and a pair of floating compression links between and in longitudinal abutment with the inner ends of the operating levers and the movable die by which the movable die is forced toward the stationary die as the levers are drawn together.

2. A staking tool comprising a head having an end wall and parallel side walls, a pair of plates secured to the sides of the head and forming the other side walls of a chamber, a stationary die loosely held in the chamber and resting against the end wall, a movable die in the chamber and having a sliding fit with the side walls thereof, compression spring means between the dies and normally holding the dies with their opposing faces spaced apart to receive the work, said side plates having workadmitting openings in alignment with the space between the opposing faces of said dies, a pair of operating levers, removable pivot pins in the side plates for the levers, and a pair of floating compression links between and in longitudinal abutment with the inner ends of the operating levers and the movable die by which the movable die is forced toward the stationary die as the levers are drawn together, said compression links having rounded ends fitting loosely in sockets in the movable die and the inner ends of the levers.

References Cited in the file of this patent UNITED STATES PATENTS 336,663 Pond Feb. 23, 1886

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