US718427A - Self-centering punch. - Google Patents

Description

iinrnrrr @errent BURTON H. CLEME'I AND GEORGE A. CLEMENT, OF BELOXT, W'ISGONSIN.

SELF-CNTEilirfiG PUNCH..

SPECIEICATIGN forming part of Letters PatentNc. 718,427, dated January 13, 1903. Application filed February 2B, 1902. Serial No. 96,055. (No model.)

To all whom it may concern:

Be it' known that we, BURTON H. CLEMENT and Geenen A. CLEMENT, citizens of the United States, residing at Beloit, county of Rock, and State of Wisconsin, have invented new and useful Improvements in Self-Centering Punches, of which the following is a' Fig. 2 is a longitudinal sectional View of the4 saine. Fig. is a view of the lower end. Fig.

fi is a sectional view drawn on line to in of Fig. Fig. 5 is a detail side view of one of the jaws and jaw-supporting arms.

Like parts are identified by the same4 re ference characters throughout the several views.

In the drawings, 1 is the'punch. 2 isa tubular guide therefor, provided with circular disks or head-flanges 3 and Li at or near its lower end.

5 represents centering-jawswhich connect with an arin C, which is pivoted at 7 between the head-flanges 3 and 4, the arin (i and jaws 5 being in the forni of a forked piece of metal, Fig. 5, with the jaw-arm of the fork bent, as best shown in Fig. 3, the jaws being so formed that when the arms (i are folded into proxiniity with the adjacent pivots, as indicated by dotted lines in Fig. 23, the jaws 5 will moet in the center line of the punch 1, the jaws being retracted from this position by swinging the arms l outwardly until such arms cxtend radially from the common center, as also shown in Fig. In o'rder to actuate all the jaws simultaneously and equally,we have pro having diagonal open-ended guide-slots 9, through which the arms 6 of the jaws pass. \Vhen the ring S is moved in the direction indicated bythe arrows in Fig. 3, the arms L3 of the jaws wili be carried around to the folded position shown linl dotted lines in said ligure and the jaws brought into central contact, as above stated.

By rotating the ring in the opposite direction, however, the jaws are retracted until the arms 6 thereof are adjusted in radial lines.

. Aspiral spring 15 is coiled around the'guide Q'within the collar S, one end'of the spring being secured to the head-flange e and the other being secured to the collar, as best .shown i'i Fig. 2, the spring being arranged to The ring 8 is held in position by means of a sleeve 16, enlarged to form an annular bearing at 17 for the ring 8. The latter also has a bearing' upon the head-flange4. The sleeve 1G is secured to the guide 2 bya set-screw 18, whichvalso engages in -a channel' or recess 19 in the punch 1, whereby the latter is permitfroin turning or` dropping out of position.

the ring S and sleeve 1G upon each other, both being 'milled or knul-led to facilitate `such manipulation, the ring being turned in the direction indicated by the arrows in Fig. 3 or an equivalent movement being 'imparted to the sleevelG in the opposite direction, whereupon the jaws will be retracted to their open position. Work can then be inserted between the jaws, when on releasing the ring 8 the reaction ,of spring 15 jaws upon the work, and as the jaws are all equally actuated toward a common center the wt i rwill be breng-ht to an exact central position. A blow upon the punch .1 is then administered, causing the point ofthe punch to dent ihe work exactly in the center.-

Having thusdescribed our invention, what we claim as new, and desire to secure by Letters Patent, is-

1. The combination with a punch; of a tu-l bular guide therefor, provided with circular disks or head-flanges near one end; arms pivotcd between the head-flanges; centering-jaws 4ope1""'ng beyond said head-flangesand connected with said` arms; and a ring rotatably s'rpported upon the head-flanges, and provided with slots in which said arms are eni gaged'.

2. The combination with a centeringpuneh;-

of aguide therefor; a set of centering-jaws connected with the guide; a jaw-adjusting ringhaving guide=slots, and operatively eqn- 1 nected with the jaw; and a spring arranged operates to close theA hold the jaws normally in closed position.

bd a limited movement, but is prevented .7o In use the jaws are opened when rotating...

r, to aetuate eaid ri g to close the jaws upon the axial line oi' tl l punch.

The combination of a centering-punch and tubular guide therefor, provided with 5 head-flanges near one end; arms extending between said head-flanges, and pivotally secured thereto; centering-jaws connected with said arms; a jaw-adjieting ring; rotatably mounted on Said headdanges, and provided 1o With diagonal guide-slots; in which the jawarms are engaged.

L The combination of a centering-punch and tubular guide therefor, provided with head-flanges near one end; arme extending l5 between said headfanges, and pivotally Secured thereto; centering-jaws connected with said arms; a jaweadjusting ring rotatably mounted on Said head-flanges, and ,provided with diagonal guide-Siete, in which the jawzo arms are engaged, `aid jaws extending: in the direction of ring rotation at an angle to the ljmwarm.

VThe combination of a tubular guide; a.

exiterng-pznch mounted for limited longi- 25 tudinal movement therein; a setof centeringjaws, pvotally connected with the guide; and aspring adapted to hold said ring normally in position With the jaws in contact in the axial line of the punch. l

G. The combination of a tubular guide, pro'- vided with circular head-flanges at one end;

centering-jaws having arms pivotally secured between said head-flanges; an adjusting-ring having open-ended guide-slots adapted to receive said arms; a holder-sleeve rigidly connected with the guide; a punch mounted for longitudinal movement in the guide;` said holder-sleeve and head-Haugen forming annu-

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