US484891A

US484891A - Punch

Info

Publication number: US484891A
Authority: US
Publication date: 1892-10-25
Anticipated expiration: 1909-10-25

Description

(No Model.)

J. MJPAIRFIELD.

PUNCH.

Patented 00:. 25, 1892 Unirnn STATES PATENT Crrics.

JOHN M. FAIRFIELD, OF HARTFORD, CONNECTICUT.

PUNCH.

SPECIFICATION forming part of Letters Patent No. 484,891, dated October 25, 1892.

Application filed October 22, 1891.

.To all whom it may concern:

Be it known that I, JOHN M. FAIRFIELD, a citizen of the United States, residing at Hartford, in the county of Hartford and State of Connecticut,-have invented certain new and useful Improvements in Punches, of which the following is a full, clear, and exact specification.

The invention relates to the class of handpuuches having a plural number of cuttingtubes of different sizes for perforatingleather, paper, or the like; and the object is to provide an efficient punch of this class which is simply and cheaply constructed with a rotary tube-barrel held more firmly and rigidly in place, so that there will be less wear to the parts anda longer life to the cutting-edge of the tubes than in prior similar punches.

To this end the invention consists in details of the construction of the barrel bearing the cutting-tubes and the end of the lever holding the tube-barrel, as more particularly hereinafter described, and pointed out in the claims.

Referring to the accompanying drawings, Figure 1 is a side view-of a punch embodying my improvements. Fig. 2 is an edge view of the same. Fig. 8 is a side view of thetubebarrel and cutting-tubes. Fig. 4 is a section of the same on a plane denoted by the broken line 00 0c of Fig. 1. Fig. 5 is a similar section of the end of the lever that holds the tubebarrel. Fig. 6 is a side view.of this end of the lever, and Fig. 7 is a detail perspective view of the'cutting-tube-supporting sleeves.

In the views, 1 indicates a pair of levers formed in any desired manner, of any suitable material, fulcrumed upon a pivot 2, and thrust apart by a spring 3. One of the levers bears on the inside an anvil 4, of softer material than the lever, against which the tubes shut when punching, while the end of the other lever is enlarged, forming a head 6. This head is provided with a transverse circular perforation 7 and with a longitudinal mortise 8, which so bifurcates the end of the lever as to form a fork 9, each arm of which has an annular opening. Between the fork held loosely in the perforations 7 is abarrel 10, from which radially project any desired number of cutting-tubes 11 of different sizes, so

that the barrel maybe rotated to bring either seen No. 409,536. (No model.)

of the tubes to the inside for punching a hole of the desired size. This barrel 10 is preferably formed of a sleeve 12 of a size that will fit the perforations in the fork and pass from side to side and a shorter sleeve 13, that fits upon the sleeve 12 between the arms of the fork, these sleeves being preferably held together by screwing the threaded end of the tubes through both.

It is preferred that the mortise 8 be formed by milling a cut longitudinally into the end of the lever; but it may be formed by screwing a plate 14 upon one side. (Shown in dotted line in Fig. 2.) If the fork is formed by screwing a plate to one side, the barrel, with the cutting-tubes, is first inserted in place and the plate then secured in position; but if the arms of the fork are integral the larger sleeve 13 may be-placed between the arms' and the smaller sleeve slipped through the perforations in the arms of the fork and the larger sleeve and the two sleeves then held by screwing the tubes in place, or the arms of the fork may be forced apart, and after the barrel is inserted in place set back. To one side of the lever is secured a spring 15,

preferably having a pin that passes through a perforation in the fork into sockets 16 in the side of the barrel to positively retain the barrel, with the tubes, in proper position for cutting; but of course the end of the spring may be made to engage notches 17 in the edge of the barrel for the same purpose, if desired. The cutting-tube barrel is so supported between the arms of the fork or bifurcated end of the lever on both sides that it will not wear loose and wabble as when supported on one side only, so that the cutting-edge of the tubes will always come down upon the anvil squarely without danger of breaking, chipping, or dulling one side, and by constructing the tube-barrel of sleeves, as described, a strong and efficient construction will be provided and the tube-barrel cheaply, quickly, and securely placed and held in position.

I claim as my invention 1. A punch comprising the two pivoted arms, one of which carries a die and the other bifurcated and provided with perforations to form bearings, a rotatable punch-carrier consisting of a collar mounted on a sleeve, the

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ends of which sleeve project beyond the collar and are journal'ed in the perforations, and

the punches having a screw-threaded engage ment with the sleeve and collar, substantially as described.

2. A punch comprising the two pivoted arms, one of which carries a die and the other bifurcated and provided with perforations to form bearings, a rotatable punch-carrier consisting of a collar mounted on a sleeve, the ends of which sleeve project beyond the collar and are-jonrnaled in the perforations, punches havihga screw-threaded engagement with the sleeve and collar, and a spring secured to one of the arms with an end projecting into a socket of one of the sleeves, substantially as described.

' JOHN M. FAIRFIELD.

. Witnesses:

ARTHUR H. CRITTENDEN, HARRY R. WILLIAMS.