US548017A

US548017A - Controlling device for power punching-machines

Info

Publication number: US548017A
Authority: US
Publication date: 1895-10-15
Anticipated expiration: 1912-10-15

Description

3 Sheets-Shet 2,

(No Model.)

. G. L. STUEBNER.

CONTROLLING DEVICE FOR VPOWER PUNGHING MACHINES;

No. 548,017. Patented 001;. 15, 1895.

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INVENTQH WITNESSES.-

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3 Sheets-Sheet 3.

(No Model.)

G.L.STUEBNER. vCONTROLLING DEVICE FOR POWER PUNGHING MACHINES.

Patented Oct. 15

. VI B A TTOHNE Y S.

WITNESSES:

Mv PHOTO-LIMO- WASKINGTUNJJL NITE STATESv GUSTAVUS L. STUEBNER, OF LONG ISLAND CITY, NEW YORK.

CONTROLLING DEVICE FOR POWER PUNCHlNG-MACHINES.

SPECIFICATION forming part of Letters Patent No. 548,017, dated October 15, 1895.

Application filed February 16 1895. Serial No. 638,707- (No model.)

To all whom it may concern:

Beit known that I, GUsTAVUs L. STUEBNER, of Long Island City, in the county of Queens and State of New York, have invented a new and Improved Controlling Device for Power Punching-Machines, of which the following is a full, clear, and exact description.

My invention relates to a controlling device for power punching-machines, the object of the invention being 'to so construct the said device that when once it has been set the punch, before entering the article to be operated upon, will approach .said article'as closely as possible without contacting therewith, in order that the operator may ascertain whether the punch is properly centered, and whereby, also, when the punch approaches the article, as above set forth, the drivingmechanism of the punch will be thrown outof gear with the power-applying mechanism, and whereby, further, upon throwing the punch-controlling mechanism into gear with the power-conveying mechanism, the punch will continue on its downward passage to punch the metal and return therefrom in the usual manner.

The invention consists in the novel construction and combination of the several parts, as will be hereinafter fully set forth, and pointed out in the claims. I Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar figures and letters of reference indicate corresponding parts inall the views.

Figure 1 is a side elevation of a powerpunch having the improvement 7 applied thereto. Fig. 2 is a plan view of the punch and the said controlling mechanism. Fig. 3 is a section taken substantially on the line 3 3 of Fig. 1. Fig. at is 'an end view of the punching-machine. Fig. 5 is a side elevation of the controlling-plate and clutch. Fig. 6 is a front elevation of a shifting-fork used in connection withfrhe clutch, the shifting-slide carried by the fork being in section. Fig. 7

is a side elevation of the shifting-slide used in connection with the shifting-fork. Fig. 8 is a plan view of the trip-shaft, which is adapted to be mounted on the shifting-slide; and Fig. 9 is a face View of the controllingplate and clutch shown in Fig, 5.

I In carrying out the invention the shaft 10 of the punching-machine A, which communicates power to the punch-driving mechanism, is provided with the usual power-pulley 11 at one end, and this pulley is provided with a clutch-surface 12 upon its inner face, adapted for engagement with a clutch B, which is mounted to slide upon and turn with the power-shaft 10. This clutch, as shown in Figs. 5 and 9, comprises a body 13, having an annular groove 14 therein, a flange 15, which is in the nature of a plate formed upon or attached to the body, and a clutch-surface 16, formed at the back of this plate for engagement with that on the power-pulley 11. The flange or plate 15 is the primary controlling device of the aforesaid controlling mechanism, and to that end it is provided with a number of apertures or openings 17, (shown best in Fig. 9,) and adjacent each aperture a designation thereof is produced on the plate, being a fraction or a whole number, and indicating a fraction of an inch, or one or a number of inches. In the drawings the scale reads from one-eighth in eighths to one inch, since the plate so marked is adapted for use in punching metal from one-eighth of an inch to one inch in thickness.

A shifting-fork O is employed in connection with the clutch B, and the body 18 of this fork at its center is pivotally attached to a stud or projection 19 on the back of the frame of the machine, as shown in Fig. 1. This shiftingfork carries upon each of its members a segmental block 20, the concaved surfaces of the blocks being made to face one another, and said blocks are of such size that they will freely enter the groove or channel 14: in the .body of the clutch. These blocks are held in position in the members of the fork by means of set-screws or pivot-pins 21 or their equivalents, and the fork is adapted for moving the clutch laterally on the powershaft.

A shifting-slide 22 (shown in detail in Fig. 7) is pivotally connected at its rear end with the shifting-fork, and this shifting-slide is provided near its rear end with a downwardly-extending arm 22", having an outwardly-extending foot at its lower end. The slide 22 has longitudinal movement in suitable guide-straps 23, secured upon one side of the frame A of the punching-machine, and tension is constantly exerted on the slide in direction of that end of the frame at which pressed downward, the slide will be forced.

rearward, placing the spring 25 under tension.

A trip-shaft 29 is mounted in bearings 30, formed upon the outer face of the slide 22 near its rear end. This trip-shaftis provided with three

arms

31, 33, and 35, placed at angles to one another. The arm 31, which is the foremost arm, is adapted to be used as a latch, and when the slide 22 is pressed backward will engage with a keeper 32, secured upon the frame, the said keeper being ordinarily a channeled or shouldered block. The intermedate arm 33 extends horizontally outward from the shaft and is connected by a spring 34 with the foot of the arm 22, forming a portion of the slide 22, while the third arm 35 of the said trip'shaft extends inward in front of the controlling plate or flange 15 of the chuck B and is adapted to be tripped or forced outward by contact with a pin 36, which is placed in one of the scaled openings 17 in the said controlling-plate.

In the operation of the attachment, when the punch has an inch throw the controllingplate is scaled, as shown in Fig. 9. Supposing a bar of metal is to be punched with a number of holes and the said bar of metal is seven-eighths of an inch thick, the pin will be placed in the controlling-plate opening marked seven-eighths. The slide 22 is then forced rearward, causing the shifting-fork to place the clutch B in driving connection with the power-wheel 11, if such a contacthad not previously been made. The driving-shaft will now be rotated, and at about the time the punch has moved one-eighth of its full throw the pin in the controlling-plate will have struck the rear arm of the trip-shaft, as shown in Fig. 3, and in passing the arm will rock the shaft outward, carrying the latch-arm 31 of that shaft out of engagement with its keeper 32 and releasing the slide 22, whereupon its spring 25 will immediately draw the slide forward and disconnect the clutch from the driving-pulley, stopping the machine. The punch will now be over the metal and close thereto, and the operator may readily determine whether or not the punch is properly centered. i Thereafter during each revolution of the shaft the punch will have passed through the metal and will be stopped by the trip device in the position it started-namely, close to the bar operated upon. After each punching operation the machine isthrown in gear by the lever 27.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. In a controlling device for power punches, the combination with a punch operating shaft, and a clutch carried thereby, of a spring pressed clutch shifting slide, a latch carried by the slide and engaging a fixed keeper on the frame for locking the slide against the tension of its spring, and intermediate mechanism between the latch and clutch for releasing the former from the latter, substantially as described.

2. In acontrolling device for power punches, the combination with the punch operating shaft, and a clutch carried thereby, of aspring pressed clutch shifting slide, a spring pressed latch carried by the slide and eugagin g a fixed keeper on the frame for locking the slide against the tension of its spring, an arm carried by the latch, and an adjustable pin carried by the clutch and adapted to engage the arm of the latch, substantially as described.

3. In a controlling device forpower punches, the combination with the driving shaft of the punch, the power pulley, and a clutch carried by the driving shaft and adapted for frictional contact with the driving pulley, of a movable trip located on the said clutch, a slide, a tension device connected with the slide, a latch adapted to hold the slide against the tension device, a shifting connection between the slide and clutch, and a rocker arm connected with the latch and operated from the said movable trip, as and for the purpose specified.

4. In acontrolling device for power punches, the combination, with a punch, a driving shaft controlling the same, a driving wheel, and a clutch mounted to slide upon and turn with the power shaft and adapted for frictional engagement with the power wheel, of a trip adjustably located on the clutch, a springcontrolled shifting slide, a shifting arm connected with the said slide and having bearing upon the clutch, a rock shaft provided with an arm for engagement with the said trip, a latch,aud a keeper adapted to be engaged by the latch and disconnected therefrom by the aforesaid arm engaging with the trip, as and for the purpose specified.

5. In acontrolling device for power punches, the combination, with the power shaft controlling the punch, a power-communicating mechanism, a clutch revolved by and held to slide upon the said shaft, adapted for frictional engagement with the power-communieating mechanism, a flange formed upon the disk, having a series of openings therein, and

a stud loosely fitted in one of the said open-' ings, of a spring-controlled slide, a shifting lever connected with the slide, adapted to operate it in one direction, one portion of the said slide being in shifting engagement with the said clutch, a trip shaft mounted upon the slide and provided with a forwardly-extending arm for engagement with the trip stud, and a latch adapted for engagement with a fixed keeper, and a tension device exerting tension on the said shaft in a direction to hold the arm thereof in the path of the aforesaid trip stud, as and for the purpose set forth.

6. In acontrolling devicefor power punches, the combination, with the drive shaft thereof, a pulley loosely mounted thereon and having a clutch face, a clutch adapted for engagement with said pulley and provided with a flange having a series of apertures therein,

and a trip stud located in one of the said apertures, of a slide, a shifting arm fulcruined on a fixed support, connected with the slide and having engagement with the clutch, a trip shaft mounted on the said slide, provided Wltll a trip arm for engagement with the trip stud of the clutch, and a latch adapted for engagement with'a fixed keeper, a tension device exerting tension on the said trip shaft in a direction to hold its trip arm in the path of the said stud, a tension mechanism operating upon the slide in a direction away from the clutch, and a shiftinglever connected With said slide, substantially as described.

GUSTAVUS L. STUEBNER.

Witnesses:

J. FRED; ACKER, J NO. M. BITTER.