US502648A - Jewel and pivot gage - Google Patents

Description

(No Model.)

.J.E.AD0 0X.l JEWEL -AND P IVQT GAGE.

- Paented Eu Y. 1-, 1893.

UNITED STATES PATENT GEEICE.

JOSEPH EPH-RIAMADOOX, `OE LEBANON, OREGON.

J EwEL. AND; PIVOT GAGE.

SPECIFICATION forming partvofLetters :Patent No. 5O.2,64l8,'dated 1, 1,893.

Application insa muys, 1892.

To all whom t may concern: Y

Be it known that I, JOSEPH EPHRIAM ADLl COX, of Lebanon, in the county of Linn and State of Oregon, have invented certain new and useful Improvements in Jewel and Pivot Gages; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable Others skilled in the art to which it appertains to make and use the same.

This invention relates to a new and improved jewel and pivot gage, and it has for its object the production of cheap, simple, and highly efficient means for measuring holes in watch jewels, or any other article 'where the exact diameter of a hole in a substance is required even to a small fraction of an inch, centimeter or millimeter; and also to facilitate the measurement of watch pinions, arbors, &c., and various pivoA s, the exact diameter being obtained. l Y

The invention consists of a jewel orrpivot gage having a dial dividedinto fractional parts of an inch, centimeter or millimeter, an index hand movable thereover by a rotary shaft, and a bar having an upper pointed end and designed to rotatesaid shaft, the upper end of said bar being designed to be projected through the hole the diameter of which is to be ascertained.

The invention further consists of a jewel or pivot gage having a dial divided into fractional parts of an inch, centimeter o r millimeter, an index hand movable thereover by a rotary shaft, a bar designed to rotate said VVshaft, and a pair of calipers, one part or member of which is movable with said bar, the pinion,the arbor, pivot or the like to be meas-v ured,being designed to'be placed between the parts of said calipers.

The invention also comprises the detail construction,combination and arrangement of parts, substantially as hereinafter fully set forth and partieularlypointed out in the claims.

In the accompanying `drawingszV--Figure l is aview inperspective of myimproved jewel or pivot gage, parts being removed. Fig. 2 is a plan view of the dial. Fig. 3 is an enlarged view of the main arbor and its adserinnaasaizi. (Nomads.) A

j uncts. Fig. 4 is a lview showing the cone and collar for the upper end of the arbor. Fig. 5 is a view of a slight modification. Y Referring to the Ydrawings,`A designates a box or case,an d a, a rotaryshaft passed longitudinally through said box or case, and supported at its ends by plates a attached to the ends of the box. Upon shaft a near one end is a pinion a2, and nearv its other end is a crown-wheel ai Y B is a vertically 'disposedbarg guided at its ends by tubes l), b projecting from-plates b2, b3, secured, respectively, to the top and bottom of box A, the ends ofsaidzbar being circularly reduced. In one side of this arbor are rack-,teeth b4 desiguedto engage with pinion a2, and effect the-rotation of shaft @when said arborlis depressed.

C designates a pair of calipers, composed of the stationary` partd 'attached at d to the end of box'A'and projecting'out lthrough a slot in the" side of vsaid '--box,fand a movable part d2 securedto barB. The outer ends of these parts dfdz, are curvedsoas to form a guide for the entrance of ra shaft or pivot to be gaged. A coil spring D encircles the lower end of bar B and-tube b and bears against the inner end of part cl2 of the calipers, the same serving to hold the bar B normally elevated and the-parts of the calipers closed together. 4

E is a vertical arbor projected through an opening in the top of box A and having an index hand etsecured thereto, the lower end of said arborrbeing supported by a coil spring e. Upon this arbor E is a pinion c2 with which the crown wheel a3 is designed to en- 'gage and .through this agency motion Iis imparted to the index arbor. The index hande travels over a circular dial F, located over the top of box A.

For ascertaining the diameterv of holes in jewels, I employ a true tapering cone G which screws down on a threaded extension :of the cone can be inclosed by a collar g designed to be slipped down thereover and rest upon the upper end of tube b. When the collar g is removed the top of tube v b acts as a stop for the jewel held on the cone, but when the colupper end of bar B. The lower end of-this 95 ICO lar is employed the upper thereof` serves as such stop. A cup-like plate II having a central cylindrical portion fits over tube b and serves to catch any jewels that may fall in the measurements of the holes thereof.

The figures on the dials are arranged in three consecutive circles, as 7L, h', h2. I use for a standard one-twentieth (l-20) of an inch. Hence when the parts of the calipers are separated to one-twentieth of an inch the index hand will have made one circumference of the dial. The circles of the dial are divided into one hundred (100) degrees. Consequently one twentieth (lO) of an inch being the stand-` ard, each degree shows one two-thousandth of an inch, and half degrees one four-thousandth of an inch. For measurement with the calipers of staffs, arbors, pivots and the like, the figures of the outer circle h2 are used, and read to the left, thus 5/2000; 10/2000; 15/ 2000, dto., around to 10U/2000 of an inch, which is, of course, one-twentieth of an inch. In measuring holes in jewels and the like I use the second circle h. The reading is started at 1GO/2000. Thus: 105/2000; 11G/2000 of an inch and so on. The cone G is one-tenth (1-10) of an inch in length and at the top of tube b is one fortieth (L40) of an inch in diameter. Consequently the cone measuring one-fortieth (L40) of an inch in diameter and tapering to a point at one-tenth (l-lO) of an inch in length and divided into one-hundred (100) spaces, each space shows one eight-thonsandth of an inch. Vhen the collar g is not used the inner circle 71. forms the basis of measurement, the top of tube b serving as a stop for the jewel or substance measured on the cone, and said cone is pressed down until the index hand reaches 200 on theinner circle h ofthedial. TheconeGisone-fortiethofaninch in diameter at the top of tube b and also for a distance of one-tenth of an inch. Hence the index hand will make one complete circumfer ence of the dial for each section of the cone. lVhen the index hand will have made one circumferenceof the dial the cone measures oneeightieth of an inch in diameter at top of tube b, commencing at 200 on dial, which means two hundred eight-thousandths of aninch, equals one-fortieth, the reading being 105 SOOO 11G/8000, &c. WVhen the collar gis employed, the projecting end of the cone is but one-twentieth of an inch and the cone measures oneeightieth of an inch in diameter at top of said collar. Vhen the collar is used and the index hand is at 100 on middle circle h', it means one hundred eight-thousandths or one-eightieth of an inch, and the reading is 5 8000 and so on. By this arrangement I greatly facilitate the reading. For example: say an opening in a jewel measures forty eight-thousandths of an inch. ,This I divide by four which gives ten two-thousandths of an inch, the size of the pivot required being nine twothousandths. In fitting jewels to pivots the reverse is the result. If the diameter of the hole to be measured is greater than one-eightieth of an inch, collar g is removed and the top of tube b serves as a stop for the jewels.

Vith this explanation the operation and advantages of my invention are apparent. It will be observed that the smaller the diameter of the hole in the jewel the greater distance the bar B is depressed. The depressing of this bar, either by a jewel on the cone, or by placing staffs, pivot or the like, within the calipers, the shaft a will be made to rotate and motion be imparted to the arbor carrying the index-hand.

It will be seen that I have produced a jewel and pivot gage which is extremely simple in construction; inexpensive and durable and that it is not liable to readily get out of order or be deranged.

In Fig. 5 I have shown a slight modification of the form of connection between the barB and the operating shaft. In lieu of the pinion and rack-teeth, I employ a wheel t' on shaft a to which is connected one end of a chain i', the other end thereof being secured to bar B. This form is employed when a change of standard is made from a fraction of an inch to centimeters or millimeters. 0r any fractional part of an inch, centimeter or milli meter can be employed as a standard byenlarging or reducing the circumference of crown-wheel a3 and increasing or reducing the number of teeth in said wheel accordingly.

I claim as my invention l. A gage for jewels and arbors, pivots and the like, having a dial of the character stated, the index hand moving thereover, a movable bar having an upper reduced end for the jewels, a pair of calipers connected with said bar, and suitable connectingmechanism between said bar and said index hand, substantially as set forth.

2. The herein-described improved gage for jewels and arbors, comprising the vertically disposed movable bar, the horizontal rotary shaft operated thereby, the vertical arbor having an index hand and operated by said shaft, and the dial having an arrangement of iigures thereon of the characterherein-described, substantially as set forth.

3. The herein-described improved gage for jewels and arbors, comprising the vertically disposed movable bar having an upper reduced end, guides therefor forming a stop, the horizontal rotary shaft operated by said bar, the arbor operated by said shaft and having an index hand on its upper end, and the dial over which said hand travels, substantially as set forth.

4. The herein-described improved gage, comprising the movable bar having a cone end, tubes through which said bar is passed, a collar designed to rest on one of said tubes and inclose said cone end, the rotary shaft operated by said arbor, the bar operated by said shaft and having an index hand, and the dial, substantially as set forth.

5. The herein-described improved gage,

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comprising the movable bar, the tubes guiding the same, the spring holding said bar, the rotary shaft movable with said bar, the dial, the arbor having an index hand extending over said dial, the spring supporting said ar-V bor, and the connection between said arbor and shaft, as set forth.

6. The herein-described improved gage for jewels and arbors, comprising the vertical bar having teeth, the horizontal rotary shaft having a pinion meshing with said teeth, the arbor carrying an index hand'at its upper end and operated by said shaft, the dial, and the removable cone on the upper end of said bar, as set forth.

7. The herein described improved gage, comprising the vertically disposed movable bar, the horizontally disposed calipers havingone of its parts movable with said bar, the rotary shaft operated by said bar, the dial, and the arbor carrying an index hand and operated by said shaft, as set forth.

8. The herein described improved gage, comprising the box having a slot in one side, the movable bar having teeth, the calipers extended through said slot and having one part secured to said box, the other part being attached to said bar, the rotary shaft having av pinion engaging said teeth, the crown-wheel on said shaft, the arbor having a pinion in engagement with said crown-wheel, the dial, and the index hand secured to said latter bar, substantially as set forth.

9. The herein described improved gage, comprising the box, the tubes secured to the top and bottom thereof, the bar having a spring support, and provided with teeth, the cone on the upper end of said bar, the inclosing collar, the rotary shaft having a pinion meshing with said teeth, the crown-wheel on said shaft, the dial, the arbor having an index-hand over said dial, the pinion on said arbor, and the spring supporting the latter, substantially as set forth.

10. A jewel gage of the character hereindescribed, having a movable bar on which the jewels are fitted, and a removable cup-like plate encircling said bar beneath the upper vend thereof, as set forth.

`In testimony whereof'I have signed this specification in the presence of two subscrib-V ing witnesses.

JOSEPH EPHRIAM ADCOX. Witnesses:

A. FRUM, W. C. PETERSON.

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