US988197A

US988197A - Wire-cutting machine.

Info

Publication number: US988197A
Authority: US
Inventors: Marvin W Lewis
Original assignee: Individual
Current assignee: Individual
Priority date: 1908-05-23
Filing date: 1908-05-23
Publication date: 1911-03-28
Anticipated expiration: 1928-03-28

Description

M. w. LEWIS. WIRE CUTTING MACHINE.

APPLICATION FILED MAY 2?, 190B.

Patented Mar. 28, 1911.

3 SHEETS-SHEET 1.

Fig. 1.

M. W. LEWIS.

WIRE CUTTING MACHINE.

APPLICATION FILED MAY 23, 1908. 988, 1 97. Patented Mar. 28, 1911.

3 BHEETS-SHBET 2.

N n 1 y 1 IIHHHHI u ga wenfo z 3513 61 Mom 1121 M. W. LEWIS. WIRE CUTTING MACHINE.

APPLICATION FILED MAY 23, 1908.

Patented Mar. 28, 1911.

3 SHEETS-8HEET 3.

Z M w .m m a MARVIN W. LEWIS, OF CLEVELAND, OHIO.

WIRE-CUTTING MACHINE.

Specification of Letters Patent.

Patented Mar. 28,1911.

Application filed May 23, 1908. Serial No. 434,703.

To all whom it may concern:

Be it known that I, MARVIN W. LEWIS, a citizen of the United States, residing at Cleveland, in the county of Ouyahoga, in the State of Ohio, have invented certain new and useful Improvements in Wire-Cutting Machines, of which the following is a specification.

The object of my invention is to provide a machine for cutting wire into desired lengths for use in foundries or wherever it is necessary to cut a number of short pieces of uniform length from a coil of wire.

The invention consists in constructing a machine that may be easily and readily adjusted to cut the desired length, that will engage and hold the wire positively during the feeding and cutting operation, and that will be automatic in its action after suitable ad justments have been made.

The invention also consists in the various other new and novel features of construction and combinations of parts hereinafter set forth and claimed.

In the accompanying drawings Figure 1 is a plan view of the machine, embodying my invention. Fig. 2 is a detail view showing the wire feeding mechanism in longitudinal section. Fig. 3 represents a sideelevation of the machine. Fig. 4 represents an end. elevation of the same. Fig. 5 represents a transverse section of the wire feeding mechanism. Fig. 6 is a detail sectional view of the tension device. Fig. 7 is a detail view showing the feed regulating mechanism. Fig. 8 is a detail view showing the clutch mechanism for the cutting device.

The machine comprises a frame 1 supported on standards 2 and having slides 3 thereon for the moving parts. An extension 4 is secured to the machine proper which has a plurality vof rollers 5 whereby the wire may be straightened prior to being fed to the machine. On the rear part of the frame is a tension device 6, which comprises a plunger 8 that is normally pressed downward by a spring 9. The end of the plunger is pivoted to a cam lever 10 which permits the plunger to be raised against the tension of the spring. This device produces enough pressure on the wire to hold same normally against any movement, except under considerable pull.

The machine is operated through a driving wheel or pulley 11, mounted upon a shaft 12 rotatable in suitable bearings 13, provided in the frame of the machine. On the opposite end of the shaft'is a crank disk, 15, having a slide or slot 16 formed therein or se cured thereto. A connecting rod 17 is pivoted at one end to a stud or slide block 18 that is movable in said slide and at its other end the rod reciprocates upon a stationary shaft 19 secured to the frame. A pin or stud 20 is secured to and projects at right angles from the connecting rod and engages with and operates the feed mechanism. This feed mechanism reciprocates on the slides 3 provided in the frame of the machine and comprises a movable member 21 and a stationary member 22. The movable member rests upon two cam levers, or arms 24, which are pivoted as at 25 and are actuated by a cam or lever plate 26 that is slotted at its lower end to engage with .the pin 20. The stationary member 21 is secured and held in position by screws or pins 27 and normally is held away from the movable member by springs 28. The position of said stationary member with relation to the movable member and to the size or gage of the wire to be cut is adjusted by a thumb screw 29.

The cutting device is pivoted as at 30 to the frame and comprises a knife 31, ar-

ranged adjacent to an opening 32 for the passage of the wire, and also comprises a roller 33 mounted on the other end of the device 34. By any suitable means, as a v spring 36, the roller is held in engagement with a cam 37 which is mounted upon the shaft 12, and is normally connected there with by-a clutch 38 seating in a recess 39 provided in the driving wheel 11, so that the knife will be actuated at each revolution of the shaft. In order to prevent the knife from operation however, a bell cranklever 40 is pivoted as at 41 to the frame of the machine and is provided with an arm 42 adapted to engage the clutch 38 and release same from the driving wheel. The other arm 43 of the lever is provided with a cam surface 44 and is actuated by a spring 45 that is attached to the frame, and adapted to hold the arm 42 in the path of the clutch. Awiper or pin-wheel 46 is rotatably mounted upon the frame adjacent to the arm 43 of the lever and is provided u on alternate arms with pins or studs 47 a apted to engage with the cam surface 44. The wiper is rotated by means of an adjustable bolt 48 upon the driving wheel that is so constructed that it may be withdrawn from the path of the wiper if desired. When the wiper is rorollers and then through the friction or tension device 6 which holds the wire against movement during the return stroke of the feeding mechanism. The wire is then passed betweenthe jaws of the feeding mechanism and the slide block or the wrist pin 18 is adjusted in the slot or slide formed in the crank disk 15 according to the length of the wire to be out. When the feeding mechanism starts on its forward or feeding stroke, the connecting rod and pin 20 actuate the cam plate 26 and thereby raise the movable member of the feed mechanism into engagement with the wire. By properly adjusting the stationary member through the means of a thumb screw 29, a very firm and positive hold or bite is obtained on the wire and it will be held positively against slipping during the feeding and cutting operations. The swell of the cam 37 which operates the cut-- tin knife is so arranged with relation to the sli e .or slot on the crank disk 15 that the cutting operation will occur immediately upon the completion of the forward or feeding stroke provided, of course, that the arm 42 of the lever is held out of the path of the clutch 38. When the feeding mechanism begins its backward or return movement the cam plate 26 is automatically shifted backward, in the position shown in Fig. 2, by the pin or stud 20 and thus the movable member of the feeding mechanism is lowered and the wire is released and rests idly between the movable and the stationary jaws. The tension device 6 meanwhile holds the wire against any movement which otherwise might be caused by the friction of the jaws of the feeding mechanism sliding alongl the wire u on their return stroke. In case, owever, t at the proper length of wire cannot be obtained merely by adjusting the slide block or wrist pin 18 in the slide in disk 15,

the movable bolt 48 is thrown into its operative position, as shown in Fig. 1, whereby it will be caused to engage the pin-wheel or wi er 46 as the driving wheel rotates. At eac alternate rotation of the driving wheel the arm 42 of the lever will be arranged in the path of the clutch 38 and will disengage .same from the recess 39 so that the cam will come to a stop and ride idly upon the shaft. At the following revolution of the driving wheel, however, the wiper will be rotated so as to bringan arm having a pin or stud 47 thereon which will lift the arm 43 against the action of the spring 45 and thus remove the arm 42 from the path of the clutch. Consequently the clutch, under the influence of any suitable means, as a spring 49, will engage in the recess 39 when such recess comes opposite the same whereby the cam will be again rotated and the knife caused to operate. By this means any length or cut of'wire within the range of the adjustment of the slide block or wrist pin in the slot or slide provided on the crank disk 15 may be doubled. By' leaving one of the pins or studs 47 in engagement with the arm 43 of the lever, the clutch will remain in engagement with the driving wheel and the knlfe will be operated at each revolution. On the other hand by arranging the wiper so that the pins 47 are out of engagement with the arm 43 of the lever the arm 42 will remain constantly in engagement with the clutch and the knife will not operate at all.

The machine is entirely automatic in its operation and requires no attention after preliminary adjustments have been made, but will operate continuously so long as wire is supplied thereto. The feeding mechanism is positive in its action andholds the wire firmly during the feeding and cutting opera- 7 tion. It is obvious, of course, that various parts of the machine may be omitted with a corresponding loss of function if desired and it is also obvious that various changes can be made in the construction of the several parts, but such changes are clearly within the skill of the mechanic and are included within the scope of my invention, provided the means set forth in the following claims be employed.

I cl aim as my invention:

1. In a wire cutting machine, the combination of a feeding mechanism, a cutting device, means for normally actuating the cutting device at the end of each forward movement of the feeding mechanism, and

means for automaticallyreleasing said actuating means at the end of each alternate forward movement of the feeding mechanism.

2. Ina wire cutting machine, the combination of a feeding mechanism, a cutting device, a shaft having a cam loosely mounted thereon to actuate the cutting device, and

a connectingrod between the shaft and the feeding mechanism to actuate said feeding mechanism.

3. In a wire cutting machine, the combination of a feeding mechanism and cutting device, means for regulating the movement ofthe feeding mechanism, and a rotatable shaft having means loosely mounted thereon engaging with the cutting device to actuate the same.

4. In a wire cutting machine, the combination of feeding mechanism and means for reciprocating the same, of a tension device comprising a plunger pivoted to a cam lever yieldingly engaging the wire to hold the same againstdisplacement during the return movement of the feeding mechanism.-

5. In a Wire cutting machine, the combination of a cutting device, means for feeding wire thereto, a rotatable shaft, a cam mounted loosely on said shaft and engaging the cutting device to operate the same, and a clutch between the cam and shaft.

6. In a wire cutting machine, the combination of a cutting device, means for feeding wire thereto, a cam detachably secured to the shaft for actuating said cutting device, and means for disengaging said cam during alternate revolutions of the shaft.

7. In a wire cutting machine, a feeding mechanism comprising a relatively stationary jaw and a relatively movable jaw, means for adjusting the position of the relatively stationary jaw, and means comprising cam levers for forcing the relatively movable member toward the relatively stationary member, substantially as described.

8. In a wire cutting machine, the combination of a feeding mechanism, a cutting device, a driving shaft, a cam loosely mounted on said shaft operatively connected with the cutting device, a clutch for engaging said cam and shaft, a crank disk on said shaft provided with aslot, a slide block adjustable in said slot, and a connecting rod secured to said slide block and to the feeding mechanism.

9. In a wire cutting machine, the combination of a knife, a cam mounted on the shaft for operating said knife, a clutch between the cam and the shaft, a lever adapted to release the cam from the shaft, a wiper provided with a plurality of studs, and means to actuate said wiper to cause one of said studs to engage with the lever and hold the same out of engagement with the clutch on alternate rotations of the shaft, substantially as described.

This specification signed and witnessed this sixth day of May A. D; 1908.

.MARVIN IV. LEWIS.

Signed in the presence of- J. H. VAN DEWEES, J. E. OHADWIOK.