US1601405A

US1601405A - Metal-bending device

Info

Publication number: US1601405A
Application number: US42083A
Authority: US
Inventors: Henry J Michaelsen
Original assignee: Individual
Current assignee: Individual
Priority date: 1925-07-07
Filing date: 1925-07-07
Publication date: 1926-09-28
Anticipated expiration: 1943-09-28

Description

Sept; 28 1926. 1,601,405

H. J. MICHAELSEN METAL BENDING DEVICE 2 Sheets-Sheet 1 Filed July '7 1925 se i. 2s,192s.- 1,601,405

- H. J. MICHAELS EN METAL BENDING DEVICE Filed July 7. 1925 2 Sheets-Sheet 2 Henr J- Michalsen Patented Sept. 28, 1926.

UNITED stares H me J. ma nesia,- ol' TACOMA; wnsnrno'ron.

MnTAnBnnnIn'G' DEVICE.

Application filed July 7,

The present invention relates to; metal bending devices and more particularly to a hand implement for I use about small machine shops and the like.

An object of. his invention isto provide a device for rolling on bending the end of a spring to form an eye such as is used in automobile spring construction so that a mechanic can easily and quickly make a repair to an automobile spring and substitute leaves therefor from stock material;

Another object is to provide a .,machine which may be adjusted to accommodate stock bars of different thicknesses and which may also be adjusted to form eyes on the ends of the bars of different diameters or of the. same diameter with stock of different thicknesses. V

A further object of the invention is to provide arecipro'catinghandle with a gripping portion ca'pable'of being moved toward and from the work according to the thickness thereofand which when adjusted may then be swung on the arc of a circle to bend the material, and may be retracted to obtain a new grip on the material forfurtherbend ing until the eye formation is complete.

A still further object of the invention is to provide a portable hand operated and adjustable device of this character whichmay be economically manufactu'redp which is light in weight, and which may be easilyset up for use Without special support or special attachments. v p

The above and various other objects and advantages of this invention will in part be described in, and in part be understood from, the following detailed description of the present preferred embodiment, the same be-; ing illustrated in the accompanying drawings, whereinz I V Fig. 1 is a vertical longitudinal section taken through a bending device-constructed according to the present invention, a bar of stock material being shown in initial position therein. y

Fig. 2 is a top plan view of the same, partly in section.

Fig. 3 is a transverse line 3-3 of Fig; 1; p I

Fig. 1 is a similar view taken'on the line HofFigl.

Fig. 5 is areduced longitudinal section taken through the device showin'gin full lines the position of the movable parts upon completion of a stroke thereof and showing section taken on the 1925. Serial No. 42,083.

in dotted lines the, initial position of the outer-end of the frame .10 may beofdeeper construction than the inner end thereof for the purpose of facilitating the. introduction and removal of. the. work, shown in the present instance as a flat bar 11 of stock material adapted to be bent or curved at one end into an eye construction; a ..P1voted to swing in the forward end of the frame 10 is a reciprocating member coin-v prising a pair of side plates-12 which are of relatively wide constructionat their lower ends, and which may .be of reduced width atthelr upper ends. The wide ends of the plates 12 are apertured .to receive there through bushings 13 which are mounted in the sides of the frame 101 and provide pivot supports for the arms 12. The outer ends of the arms 12 are connected together by a cross bar 14 which is provided with a trans verse opening therethrough for the purpose to be presently described.

, A hand lever 15 is fitted at its lower end between the intermediate portions of the plates 12 a'ndis provided at its rear side and lower end with'an offset pivot eye 16 through'which is fitted a rod 17 carried by the plates 12 to pivotally, support the handle 15. Extending forwardly from the pivot 16 and from the inner end of the hand lever 15 is an arcu'ate claw 18 .with afratchet toothed lower surface with the teeth facing outwardly adapted to engage-the upper surface of the stock 11 for binding against it when the handle 15 is swung forwardly.

A core pin 19 is removably fitted across the frame 10 in the bushings 13 and is given suitable dimensions at opposite ends to closely fit the bushings'13. The intermediate portion of the pin 19 is so proportioned, as to diameter as to engage and bear" againstthe under side of the stock 11 and support it against pressure of the claw 18. The core pin 19 is removable and provided upon one end with a finger hold or ring 20 by means of which the pin may be withdrawn and inserted. To determine the positioning of the pin the end adjacent the finger hold 20 may have an enlarged head 21, and the adjacent bushing 13 may be of corresponding size to receive it, while the inner end 22 of the pin may be of smaller diameter and the adjacent bushing 13 correspondingly reduced.

The core pins 19 may be of different sizes as to their central portions so as to accommodate stock 11 of different thicknesses and to form eyes of different diameters, and in Fig. 7 .is shown one modification ofcore pin 23 which has a reduced intermediate portion as compared with the pin 19.

The handle 15 is provided with an opening 24 therethrough adapted to register with the opening 25 in the cross bar 14, and a bolt 26 is loosely fitted through the

openings

24 and 25 and provided thereon with a coil spring 27 lying between the hand lever 15 and the cross bar 14 to normally urge the same apart. A winged nut 28 is threaded upon the rear end of the bolt 26 and bears against the rear side of the cross bar 14 to draw the bolt backwardly through the hand lever 15 and the cross bar 14 and bind the head of the bolt 26 against the forward side of the hand lever 15. As shown in dotted lines in Fig. 1 the winged nut 28 may be adjusted lengthwise of the bolt 26 to vary the distance between the hand lever 15 and the bar 14. This distance is adjusted to bring the claw 18 against the work when the reciprocating member is swung backwardly to its initial position and to take up the play between the hand lever 15 and the reciprocating member when the hand lever is drawn forwardly and downwardly to bend the stock 11 about the core pin 19.

In order to hold the rear portion of the stock 11 from rising during the bending operation, the frame 10 may be provided with a pair of upstanding ears 29 for receiving a cross pin 30 which is selectively positioned in registering openings 31 formed in the ears.

In operation the selected core pin 19 is inserted in the frame concentrically to the re ciprocating member. The bar 11 is fitted under the pin 30 and upon the upper side of the core pin 19. The winged nut 28 is adjusted along the bolt 26 to swing the hand lever 15 and bring the claw 18 into proper contact with the upper surface of the stock 11. The hand lever 15 is now swung forwardly into the full line position shown in Fig. 5, such as to bind the stock upon the core pin and draw the stock forwardly and bend it downwardly against the outer surface of the pin. The reciprocating member is now returned to initial position as shown in dotted lines in Fig. 5, and the operation repeated with the claw 18 engaging the succeeding portion of the stock 11. The re ciprocating member and the hand lever 15 is thus worked back and forth until the complete eye is formed, or the curvature carried out to the desired extent.

The claw member 18 together with the hand lever 15 provides a gripping member which is caried by the reciprocating member and which is initially operated prior to the advance of the reciprocating member, and which is released by the sliding of the bolt 24 through the lever 15 and bar 14 when the spring 27 is compressed during the initial backward movement to retract the reciprocating member. The openings 31 in the ears 29 may be carried through the sides of the frame 10 as shown in Fig. 3 so that the bar 30 may be inserted through the ears from either side of the device.

It is of course understood that various changes and modifications may be made in the details of construction and design of the above specifically described embodiment of this invention without, departing from the spirit thereof, and being restricted only by the scope of the following claims.

What is claimed is:

1. A spring eye bender comprising a frame,

a pin mounted in the frame, a pivotal memher on the pin, a lever mounted on the pivotal member and adapted to turn therewith, a claw secured to said lever and at the forward end thereof, adjusting means for said claw, and a spring interposed between said lever and said adjusting means for insuring the initial gripping of the claw.

2. A spring eye bender comprising a frame, a pin in the frame, a reciprocating member mounted on the pin and adapted to swing therearound, a claw pivotally mounted on said reciprocating member, adjusting means for said claw, yieldable means adapted to insure the intial gripping of said claw prior to the forward movement thereof, and a lever secured to said claw for swinging the. claw and the reciprocating member about the pin. Y

3. An automobile spring eye bender, comprising a frame, a removable core pin mounted in the frame for supporting the end of a stock bar, a reciprocating member pivotally mounted on the frame, concentric to the core pin, a hand lever pivoted on the reciprocating member, a claw projecting forwardly from the pivoted end of said lever and adapted to bind against the upper side of said bar, a bolt adjustably connectingithe lever with the reciprocating member, and a spring interposed between the lever and the reciprocating member for insuring the initial gripping of the work against the core pin prior to the movement of the reciprocating member by said handle.

4. A metal eye bender comprising a frame,

a work support pin in the frame, a reciprocating member mounted on the pin, a claw pivoted to said reciprocating member, a bolt connecting the upper end of said claw and said reciprocating member for adjusting the claw with respect to said pin, and a spring mounted on said bolt and between the claw and the reciprocating member for insuring the initial gripping of the claw.

5. A metal eye bender comprising a frame, a core pin removably mounted in the frame,

a reciprocating member adapted to swing about said core pin, a claw pivoted to said reciprocating member, adjustable means for said claw, and a spring mounted on said adjustable means and between the claw and reciprocating member for insuring the gripping of the claw upon the work prior to the swinging of the reciprocating member about the core pin.

HENRY J. MIGHAELSEN.