US908817A

US908817A - Punching-machine.

Info

Publication number: US908817A
Authority: US
Inventors: George P Thomas
Original assignee: Individual
Current assignee: Individual
Priority date: 1907-10-11
Filing date: 1907-10-11
Publication date: 1909-01-05
Anticipated expiration: 1926-01-05

Description

G'. J?. THOMAS.

l PUNCHII'G'` MACHINE. APPLICATION FILED 00T.11, 1907.

Patented Jam.y 5, 1909.V

2 SHEETS-SHEET l.

FIE E.

0Go 786 n 0 |1 L: 7 4 Q OQO w I. M 7A 5 91N Jl [IWW: HUWII 7 7 G. P. THUlVa Y PUNGHING MACHINE.

APPLIUATION gum 0011.11, 1907.

908,8 7a Patented 5, w09.

2 SHEETS-SHEET 2.'

WITNESSESI Y? Qfmys GEORGE P. THOMAS, `OF PITTSBURG, PENNSYLVANIA.

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Specication of Letters Patent.

Application lsd October 1191907. Serial No. 396,967.

Patented aan. 5, reos.`

To all 'whom it may concern.'

Be it known that I, GEQRGE P. THOMAS, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, a citizen of the United States, have invented or discovered certain new and useful Improve ments in Punching-Machines,l of which im .provements the following is a specification.

In punching plates, etc., where the posi-4 tionsof` the-holes cannot be determined by suitably arranged stops, great difficulty is encountered in placing the plate or other article accurately in position under the punch, although the points where the Vholes are to be formed-has been previously marked or indicated on the plates.

The-object of the present invention is to provide for the accurate positioning of the plate under the punch, prior to the operation of the latter.`

rlhe invention is hereinafter more fully described and claimed.

In the accompanying drawings forming a part of this specification,l Figure 1 is a side elevation of a punch having my improvement applied thereto; Fig. 2.is a front elevation o the machine j Fig. 3 is a sectional plan, the plane of'section being indicated by the linelII-lll 'Fig 1; F iff. 4 is a sectional elevation on a plane indicated by the line IV--lV Fig. l; and 5 is a detail view' illustrating avmodiication of the sleeveshifting means;

In' the practice of my' invention the punch o erating mechanism may be of any suita le construction, --but is preferably of the type, in which the movementof the punch-` ing head 1 is controlledfby the operator through a suitable form or construction of clutch mechanism as indicated at 2. The head ,1' is provided with a stem 3, to which the punch 4 is secured as -by the annular nut 5 screwing into a recess in the-endof the stem, .'A guide is provided to insure the proper position of the plate, such guide being arranged in such relation to the punch that when the plate has been moved to a position Where the guide will be in line with or bear upon a certain pre-determined point on the plate to4 be unched, the oint at which the hole is to e formed will e accurately. inline with the punch. In my preferred construction thisguide is made in thel form of a nippie constructedto move freely over the punch 4 and secured to .a 'sleeve 7 movably mounted on the stem 3.

'ln using this guide it is shifted so as to ro# ject down onto the plate to be punc led, and when the plate has been moved sothat the nipple will accurately indicate the point to be punched, the punch is operated'. The sleeve and nipple can be operated by the hand or the foot of the operator, but referably by the foot. To that end the s eeve 7 is connected to one endkof a lever 8 which can be shifted by a treadle `9.' A desirable construction to this end consists of an arm 10 pivotally connected to the punch in such position that when moved to vertical osition it will force. the outer end. of the ever and the sleeve. 'l'his arm lO'is connected to one arm of a bell crank lever 11 the opposite arm being connected to the treadle by a rod 12. An efficient means for shifting the lever 8 and the sleeve is shown in Fig. 5 and consists of a wedge block 10 l mounted on a suitable support on the frame of the punch, and connected to ther bell- -wedge block being provided with straight y portions, which come into alinement on movement of the block and' lock the lever and sleevein stripping position.

Itis preferred that the same treadle should be used to move the sleeve and nipple and also shift the clutch so as to connect the power shaft with the punch-head l. To this -end the treadle is connected t'ov a rod 13 op- \erating the movable member of the clutch 2, in such manner that the rod will not be moved by the treadle until the block or arm l0 has shifted to cause the lever to"1nove the nipple down onto the platewhereupon `"the further movement of the treadle will shift the clutch but will not ymove the lever 8, as the straight portions a of the lever'and block bear at that time on eac-h other.

-While the plates can be supported during so mounted as to be capable of being movedtowards and from each other', thus providing a stable support for platesvarying largely in .sisting of sections 17 and 18 hinged together;y

and'a plurality' of arms 15 havmg a pivotal connection to the outer section 17, such connection being the pin 16. rIhe ngers 14 are hinged as stated to the arm 15 forming the outer member of the jointed frame. This construction of Work. support, which is. also` 4adapted for use in/other metal o erations than punching, permits of a Wi e or restricted' spread of the fingers and a movement of the fingers and articles carried there-` by, horizontally in any direction.

ln punching lates a templet 26 is pre-` ared having ho es arranged as desired in the nished plate and of a size to permit of the entrance of the end of the nipple4 6. T` g. templetvis secured on the plate by suitablf clamps 27 and the plate placed on the supporting fingers 14. 'Ihe operator presses down on the treadle at the same timeshifting the plate, until the nipple Will pass int'o orthrough a hole in the templet. As soon as the nipple has entered the hole in the templet the treadle is further depressed thereby shifting the movable member of the clutch and causing the operation of the punch. Y It will be observed that' unless the nipple enters a hole in the templet the treadle 'cannot be moved sufficiently far to shift the'- clutch, thus rendering it necessary to bring the late in proper position before a hole can he punched.

I claim herein as Ymy invention: 1. A punching machine, having in combination a movable punch. means for operating the punch, a punch guide having predetermined osition relative to the unch, and means or moving the punch guide towards the article tobe unched in advance of the punch and. for hdlding the guide in contact with sucharticle after punch.

2. A punching machine, having in combination a movable punch, means for operating the,punch, a dnch guide and means for moving the guide towards the article operated pn and controlling the operation of the unc p 3. A punching machine, having in combination a movable punch, means for operating the punch, a nipple surrounding the punch and means for moving the nipple independent of the punch and holding it in ad-- vancreld position during the retraction of the punc 4. A punching machine having in combithe retraction of the nation a movable punch, a nipple surrounding the punch, means for moving the nipple .independent of the punch and means for locking the nipple when shifted.

5. A punching machine having in combination a punch, means for operating the punch, a nipple surrounding the punch and means for moving the nipple independent of the punchand 'controlling the punch operating means.

6. A punching machine having in combination a punch, mans for operating the punch, a punch guide, means for moving the guide independent of the punch and con- Y trolling the operation of the punch operating means, and means for preventing the punch controlling movementprior to the full operative movement of'the guide:

7. A punching machine having in'combination a punch, means for operating the punch,. a nipple surrounding the punch, a'

for shifting the lever, a treadle for shifting .the We dge-block, connections extending from the treadle and controlling the punch operating means, the connections being adapted of the nipple.

8. A punching machine 'havingin combi.- nation ,a templet having holes arranged in the relation desired in the finished plate and adapted to be secured to the latter, a punch, 'means for operating the punchga nipple surrounding the punch and means for causing the nipple to enter the holes in the templet "such position during the .retraction ofthe punch.

9. A metal Working machine having in combination therewith a pivotally vmounted and jointed frame and a lurality ofvvork supporting fingers pivotaly connected to said frame.

v to the bracket and a plurality of Work supporting fingers connected to the outer-arm and movable relative to each other.-

11. A metal Working machine having in combination therewith a swinging bracket, an arm pivotally connected to thebracket, a

fingers pivotally connected to the free ends of the second arms. A

In testimony whereof, I have hereunto set my hand. f

y GEORGE r. THOMAS; Witnesses: l'

ALICE A. TRrLL,

CnA'RLEs BARNETT.

lever connected to the nipple, a Wedgeblock'l` to be shifted subsequent to the movementA in advance of the punch and holding it iny 10. A metal Working machine having in` combination therewitha swinging bracketf arms pivotally connected to eachother and.

prlurality of arms pivotally connected to the" ee end ofthe first arm and Work-supporting.

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