US61902A - Andrew-v - Google Patents

Description

@uitzotatreatwt @ber ANDREW v. D. WEsTERvE-LT, oEQNf-EW BRUNSWICK. NEW JEEsEnAssIGNoE To -HIMSEL'E J. WWESTEEYELT, AND H. SMITH, JE; y 1 f parent No, 61,99?, end jetwfy 1861.

I'EumnfEuE-NTv IN GALIPEES.

Letiers4 l @te .Singulus nfetreri in tlgesrgttens ntent 1mb making gint nf tlg: time.

TO ALL WHOM IT MAY CONCERN:

Be it known that I, ANDREW V. D. WEsrEuvEL'r, of New Brunswick, in the countyof Middlesex, andi j State of` New Jersey, have invented a. new and useful Improvement in Calipers and Dividers; sind I do hereby declare that the following is n. full, clear, und exact description thereof, which will enable others skilled in tho art to make and use the same, rfeience being had to the accompanying drawings, forming a. part of this specitfi cation, in which- Figure l represents a pnir of'culipers ha-vingmy improvement uttuched.

Figure 2 is mother view of thesame.

Figures 3 and 4 ure views o? the legs of the calipers separated.

Figure 5 is n view of :t portion 4of the calipers partially in section, und enlarged inthe scale.

Similar letters of reference indicate like parts. f i 1 f The nature of this inventionl consists in attaching a.V worm und worm-wheel to :i pair of calipers, dividers,l

v or comptdssesfur. the. rurrese Qfneninuenfi desirsthe less a. 1,..sreds them @smiliemkinglmstsuref ,l

ments of' either internal or external work. The legs are fixed ut any point by the wormwheel, and the rneusixrc` ment is carried with certainty, The worin` and worm-wheel are placed near the jointol' the legs, wherefthey1 are entirely out of the way in handling and taking ircasurements. i

t i he drawings (figs. 1 and 2) represent a, pair of calipers, of which a a' arethe legs, joined by the pivotic.- "il On one end of the pivot c is allixedu small spur-wheel,4 i5, which engages in u. worm, e, that is mounted uponf two little standards d d', fusteneil on theoutside of one of the legs, a. The shaft of the worm e projects through 1" one of the standards d, and on the extreme e'n'd of it is placed u. milled disk or burr,f, for turningwith` the` thumb and linger. The leg ra, on which the worm e is mounted, turns freely on the pivot c, but the l g,u, fitted on a squure hub ou the pivot to 'prevent it` from turning thereon, and itis secured by :Eilat binding.. screw-nut, l1., on the end of the pivot, as shown at iig. 5.- i i The operation of this device is obvious: By turning the worm e around by the burrf, ,the wormwheel' b` wllreceiverotary motion, which will open or close the legs ot' the calipers, or' compasses `towliich they may be i applied, by n. slow and graduated movement, und then4 `the legs will remain stationary at any point when the` motion of the worin ceases.- I Y v i l l `I'loving thus described my invention, `what I clim as new, and desire tol secure by` Letters Patent, is--l` g 1. The pivot e, fitted on one end to the leg` a', forming the bearing for the two legs of the calipersypiio- 4 vided atthe other end with the spur-wheel b, operuting with the worm e, mounted on leg a, substantially as and i for the purpose specied. i i Y i i 2. The leg a, provided with standards d, bearing theworm ejand the leg a'4 to which the pivot c is secured in Acombination with-the pivot c, to which the wheel b is secured, constructed and operating in the manner and for the purpose specied. I Y l. l i i i The above speciication of my invention signed by me this. 29th dey of August, 1866.

f "ANDREW V. D. WESTERVELE..."

Witnesses:

Wu. F. M cNAMAnA,

F. ROBERTS.

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