US235507A - Finger-measure - Google Patents

Description

(No Model.)

R. T. CHAPMAN. Finger Measures.

No. 235,507. Patented Dec. 14,1880.

fine/7x272 a e/7% P767. immw N.PETERS, PHOTO LTHOGRAPMER WASHINGTON D c UNTTED STATES PATENT @rrroa ROBERT T. CHAPMAN, OF LOUISVILLE, KENTUCKY.

FINGER-MEASURE.

SPECIFICATION forming part of Letters Patent No. 235,507, dated December 14, 1880,

Application filed May 31, 1880. (N0 model.)

To all whom it may concern:

Be it known that I, ROBERT T. CHAPMAN, of Louisville, in the county of Jefferson and State of Kentucky, have invented certain new and useful Improvements in Fin ger-Measures; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being bad to the accompanying drawings, and to the letters of reference marked thereon, which form part of this specification, in which- Figure l is a sideelevation; Fig. 2, acentral vertical section; Fig. 3, an enlarged section, showing the ratchet andpawl; and Fig. 4, adetail View of a modification of my invention.

My invention relates to gages or measures for ascertaining the size of fingers when being titted with rings; and it consists in the combination of devices hereinafter described, and more fully set forth in the claims.

In order that others skilled in the art may make and use my invention, I will now proceed to describe its construction and operation.

A represents a hollow standard or shaft, open at each end. The upper end is flaring or bell-mouthed, as seen in the drawings, and is provided with a. block, a, fitting within it in such a manner as to leave a small space between the shaft and block on either side.

Between the block a and mouth of the shaft A is secured one end of the thin metal spring B, which should be of sufficient length to encircle the largest finger. The other end of this spring passes down through the opening on the opposite side of the block a, so as to form a circle, and is secured to a sliding block, 1), within the shaft. The shaft or standard A is slotted on each side nearly from end to end and provided with the slide G, which is secured to the sliding block b by small screws or rivets through the slots in such a manner I that the slide 0 and block b will move together, the one out and the other inside the shaft.

D represents a notched rod placed within the tube A, with'its upper end secured to block b, and provided at its lower end with button d.

To the lower end of the shaft A is secured a hollow handle, E, containing a spiral spring, 0, which bears against the button (I, as seen in Fig. 2. Secured to the shaft Anear its lower end is also a spring-pawl, f, which extends through the shaft and engages with the notched bar D, being thrown out of contact with the bar by means of a pivoted thumb-latch, g, as fully seen in Fig. 3. Inside the flat springband B is another similar band, G, whose ends are lapped and held in place by a small bar or loop, h, as seen in Fig. 1.

The face of the shaft A is marked with a scale graduated to any of the usual standards for such use, and the operation is as follows: \Vhen the size of a ring is desired the instrument is placed over the finger at the second joint and the sliding ring 0 is pulled down, carrying with it the sliding block Z), to which the end of spring B is secured, compressing the inner ring, G, till it fits moderately close over the finger-joint. The slide 0 will now mark or indicate the size of the ring on the scale, and be held in place by the pawl f engaging with the notched bar D and holding it at that point as long as desired, when the thumb-latch g is pressed, releasing the bar D, which is thrown up again by the spiral spring 0.

Instead of the loop h, for holding the ends of the ring G, I may use the device shown in Fig. 4, consisting of a small lug on each side of one end of the band, which are bent over the other end, forming guides between which it slides.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

1. In an instrument for measuring the circumference of fingers, the metal spring-ring B, having one end fixedly secured to a stem, while the other is movably attached to a slide, substantially in the manner herein described.

2. The combination, in an instrument for measuring the size of fingers, of an extensible and contractible outer metal ring with an inner ring of the same nature, substantially as specified.

3. The combination of the outer spring-ring, 13, having one end stationarily attached to one side of a hollow stem, while the other end is slide 0, notched bar D, stern E, and springpawl, all constructed and arranged to operate substantially as and for the purpose set forth.

In testimony that I claim the foregoing as my own I EtiflX my signature in presence of 15 two witnesses.

ROBERT T. CHAPMAN.

stein, all substantially as and for the purpose 5 set forth.

5. The combination of spring-rings B G,

Images