US1330330A - Ring-gage - Google Patents

Description

A. H. MAYNARD.

RING GAGE.

APPLICATION FILED MAR. 8, 1919.

1,330,330. Patented Feb. 10,1920.

AMOS H. MAYNARD, 0F EAST DURI-IAM, NORTH CAROLINA.

RING-GAGE.

Specification of Letters Patent.

Patenten Feb. 1o, 192e.

Application filed March S, 1919. VSeriaI No. 281,375.

To all whom t may concern.'

Be it known that I, AMos I-I. MAYNARD, a citizen of the United States, residing at East Durham, in the county of Durham and State of North Carolina, have invented cer.- tain new and useful Improvements in Ring Gages, of which the following is a specification.

This invention relates to gages, and more especially to those for measuring circular sizes by means of a flexible band; and it has as one of its objects to provide a gage which will be compact and may be adjusted to fit the linger with any desired degree of snugness, and which will be accurate in itsdetermination of ring sizes. n

Another object of the invention is to provide ya gage of such construction that it will not be liable to a disarrangement of its parts and in which any adjustment made will be retained until a new adjustment is effected.

In the accompanying drawings:

Figure 1 is a perspective view of the gage embodying `the present invention, certain of the parts being separated so as to better illustrate the construction;

Fig. 2 is a vertical longitudinal sectional view through the gage;

Fig. 3 is a perspective view of a portion of the gage. Corresponding and like parts are referred to in the following description and indicated in all the views of the accompanying drawings by the same reference characters.

The device embodying the present invention includes a tubular handle which is indicated by the numeral 1 and which is interiorly threaded at one end as indicated by the numeral 2 and exteriorly threaded at its opposite end as indicated by the numeral 3. The numeral 4 indicates in generala tubular shank which at one endis provided with a threaded cylindrical portion 5 which is fitted into the end 2 of the handle 1 as clearly shown in Fig. 2 of the drawings. The said shank 4 while of tubular form is fiat and substantially rectangular in cross section so that the bore thereof, indicated by the numeral 6, is of similar form.

The finger encircling member of the gage is in the nature of a gage band? of resilient metal and this band at one end is welded or otherwise secured as at 8 to the outer end of the shank 4, this extremity of the band extending slightly beyond the point of attachment to the said end of the shank for a purpose which will presently be made apparent. The band 7 from its secured end is bowed to substantially7 circular form and inserted slidably through the bore 6 of the shank 4, the bowing of-the band providing a finger loop 9 lying' beyond the outer end of the said shank. It will now be observed by reference to the drawings that inner surface of the loop 9 describes substantially a true circle and is adapted to accurately fit the finger to be measured, and by sliding the band longitudinally in the shank 4, the loop 9 will be expanded and contracted. In order thatthis expansion and contraction may bemeasured so that when the band is fitting a finger the ring size will be indicated to the user of the device, the band is provided upon the upper face of its portion which is slidably fitted within the bore 6 of the shank 4 with a suitable scale indicated by the numeral 10 and this scale is visible through an opening 1l formed in the upper side of the said shank 4 and adjacent which opening the shank is provided with an indicatorv point or notch 12 with which the marks of the scale 10 may be brought into registration.

The numeral 13 indicates a sleeve which is interiorly threaded as indicated by the fork having arms 15 extending beyond one of its ends. The inner end of the band 7 extends into the tubular handle 1v and is connected as at 16 to the arms 15, the sleeve 13 being located of course within the said handle and being freely movable longitudinally therein. Inorder that this movement may be effected a stem 17 is threaded intothe sleeve 14 and this stem is reduced as indicated by the numeral 18 and its reduced end is rotatably fitted through an opening 19 formed in a cap 20 threaded onto the end 3 of the handle 1. In reducing the stem a shoulder 21 is formed and this shoulder bears against a washer 22 loosely fitted upon the reduced end of the stem and thus the stem is swiveled to the handle where it is confined between the shoulder 21 and the head of the cap 20. A milled head 23 is secured in any suitable manner upon the re- 4numeral 14 and which is provided with a duced end 18 of the stem 17 beyond the cap i adjust the sleevel, and therefore to expand and contract the loop 9. In order to inspect, repair or replace interior parts, the head 23 is rotated to enlarge the loop, and then the cap 20 is unscrewed from the threaded end 3 of the handle and the handle unscrewed at l 2- from the shank 4. This gives access to the pin or rivet 16 which may now be driven out, and the parts are free for separation. After cleansing and repairing theyv are restored by reversal of this operation. 1t will be obvious that in order to impart accuracy to the measurement indicated within the side opening` 11, the handle may be adjusted Where it is screwed onto the shank, or the cap where it is screwed onto the handle, or both;v and the careful jeweler or other user will doubtless test the instrument after its parts have been 'separated and restored, so that subsequent measurements will be accurate.

Having` thus described the invention, what is claimed as new is:

The herein described gage, thesame cornprising` a shank having a longitudinal bore and a sight opening intersecting the same,

a handle screwed onto the inner end of lthe,

lmilled head on the outside of the latter, a

sleeve within the handle threaded at one end on said screw and forked at its other end, and a pin through the fork arms and the other end Of said band.

In testimony whereof I affix my signature.

AMOS H. MAYNA'RD. [n s]

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