US547554A

US547554A - Punchinq-machine

Info

Publication number: US547554A
Authority: US
Publication date: 1895-10-08
Anticipated expiration: 1912-10-08

Description

J. M. LONG. PUNCHING MACHINE.

1N0 Model.)

No. 547,554. Patented Oct. 8, 1895.

Inventor Attorney WWM. S

Wald;

UNIT In) STATES PATENT OFFICE.

JOHN a. tone, or nannxros, onto.

PUNCHlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 547,554, dated October 8, 1895.

Application filed June 8,1806.

1'0 (116 It'll-01111 (It may concern:

lie it known thatI, JOHN M. l.i).\'u,of llamilton, liutlor county, ()hio, have invented certain new and useful Improvements in Punching-Machines, of which the following isa specillcation.

This invention pertains to improvements in that class of Self-feeding punching-machinos in which the sheet to be punched is secured to a longitudinally-moving table, which is advanced by suitable mechanism at each stroke of the punch, so as to produce a row of preperly-spaced holes. I do not show or describe the table or its supports, as they may be of any usual or well-known form of structure.

My in'iprovcmcnts will be readily understood from the following description, taken in connection with the accompanyingdrawings, in which- Figure l is a side elevation of a punchingmachino embodying my improvements; Fig. 3,9. front elevation of the same; Fig. 3, a front elevation, on an enlarged scalo, of the pawlbar, and Fig. 4 a rear elevation of the pawl.

in the drawings, 1 indicates the body of tho punching-machine, of ordinary construction; :2, the punch-ram at the front of the body of the machine; 13, the die; 4, the cam-shaft extending from the ram through and rearwardly beyond the body of the machine; 5, a notched rack to be secured to the usual traveling table which supports the work, this rack having notches spaced in accordance with the de sired spacing of the punching; ti, a horizontal guideway rigidly secured to the body of the machine near to and parallel with the rackbar 5, this guidcway being at. right angles to the movement of punch-ram 2; 7, a pawl-bar arranged to slide in the guideway ti; b, a pawl pivoted to pawl-bar 7, its point engaging the rack-bar :3; a rock-shaft supported by the body of the machine parallel with cam-shaft i and having its forward end about in the plane of pawl-bar 7; 10, a link positively eugaging crank-arms on the rear ends of shaft 9 and shaft-t, whereby the movement of shaft 4, in operating the punch-ram, results in retatory motion of rock-shaft fl; 11, an arm fast on the front end of shaft i); 12, a link connectlng thisarm with pawl-bar 7, whereby the movement of the rock-shaft results in reciprocations of the pawl-bar and pawl; 13,11 camshaped recess in the rear face of pawl 8; 14, a rod sliding on pawl-bar 7 and having at its inner end a projection engaging within the .inclined recess 13 of the pawl, and 15 an adjustable crank-arm on shafti for altering the degree of angular motion of rock-shaft!) and, consequently, the stroke of pawl S in both its directions of motion.

It will be obvious that at each stroke of the punch the pawl-bar 7 is positively reciprocated, and that rack-bar 5 will be advanced one tooth. The rack-bar will be notched in correspondence with the desired spacing to be produced in the punching. Crank 15 is to be adjusted to such throw that pawi S will have a stroke in excess of one space of toothing in rack-bar 5, but not equal to two of the spacings. Great accuracy of adjustment of movement for the pawl is not therefore requisite, it being only necessary that. the rack-bar shall be accurate. Selective rack-bars may be provided, one for each desired character of spacing, each bar being provided with one notch or tooth for each punching, or, ifdesired, the rack-bar may have its notches spaced in accordance with a given minimum spacing desired in the punching. \Vith such a bar,such'minimum spacing of punching maybe produced, or the spacing may be increased in multiples of that minimum spacing by adjusting crank 15 to cause the pawl to have a stroke in excess of the distance represented by the numberof teeth rcpresenting the desired space, but not equal to the next higher number of teeth. l-ly this means one rack-bar will answer for a given minimum of spacing and multiples thereof. For special work calling for irregular spacing the rack-bar will be notched accordingly, and the pawl-stroke will be adjusted to be in excess of maximum spacing, but not e ual to any two contiguous spaces.

lly pulling upon rod 14 the pawl is lifted out of engagement with the rack-bar and sustained in an idle position, thus permitting movement to be given to the table of the machine by hand in the usual way.

I claim as my invention- 1. In a punching-machine, the combination, substantially as set forth, of the machine body, the punch ram mounted in the front thereof, the cam-shaftextending from the ram through and rearwardly beyond the body, the adjust rigidly supported thereby at right angles to the movement of the punch-ram of the machine, a pawl-bar sliding in said guideway and arranged to be reciprocated from the aetuat ing mechanism of the maehine,a pawl pivoted to the pawl-bar and having a cam-shaped recess, and a rod sliding in said pawl-bar and having a projection engaging said recess.

JOHN M. L NG. Witnesses:

J. W. SEE, l. Sana-nu;