US2527058A - Set indicator aid for micrometers - Google Patents

Description

I G. E. GLAUSER SET INDICATOR AIDS FOR MICROMETERS Oct. 24,1950

I Fiied Aug. 14, 1947 INVENTOR. Ciaader G QfaanE Patented Oct. 24, 1950 r siir iNnioA'roaam FOR- MICROMETERS-I r I e raon'n. onuser, yri 'ohio v Application-August 14, 1947 Serial No. 768,692

' is Cla'iinfs. (01.33916 Q-My present inventionrelates to the ge ie fi l v class of geometrical instruments, or micrometers,

and more specifically to an improved set indi-' V cating aid for micrometers of the, type employing opposed contacts with screw adjustment, and

especially adapted for measuring short distances, lengths and angles. and for calipering'diameters of cylindrical bodies.

Theprimary object of ,the' invention is the provision of aguide device for setting the micrometer to: aid in enhancing, and increasing, the operating speed ofpthe instrument for. precision measuring and, calipering. and the invention includes a mini mum number of component parts that may. with facility be manufactured at low cost of produce tion; andassembled'with convenience on a conventional micrometer of this type, to insure an easily operated and precise measuring instru- The inventon consists in certain novel features of construction and combinations, and arrange; ments of parts"as"wi11 hereinafter be described} and more particularly set forth in the appended.

claims. -.-'In" the accompanying drawings I have illustrated a complete example of aphysical embodiment of my invention wherein the parts are combined'an'd arranged in accord with one model have devised for the practical application of the principles of my inventionf Itwill, however.- be understood that changes and alterations are contemplated and may be made in these exemplifying drawings and mechanical structures, within the scope of my claims without departing from the principles of the invention.

Figure 1 is an assembly view showing a'con-' ventional micrometer equipped with the high and low setting rings of my invention; and Figure 2 is an enlarged view of a portion of the instrument disclosing the barrel of the instrument having an annular groove or channel to accommodate the setting rings.

Figures 3 and 4 are respectively an edge view and a face view of one of the setting rings or indicator rings;

Figures 5 and 6 are respectively an edge view and a face view of another indicator or setting ring; and I Figures 7 and 8 show an edge view and a face view respectively of the intermediate resilient or elasticfrictional coupling ring or expander.

In order that the general arrangement and utility of parts may readily be understood I have shown in the assembly view Fig. 1 a conventional relj with its annular graduated scale, and tapered scaleZ, togetherwith the linear graduated scale on the stationary thimble 3, which are, capable of being alined with the marker or line: as indicated in.Fig.-;1. i

V The stationary bearing-yoke 4 is provided with a fixed contact head 5, and the screw bar. 6 journaled in the-bearing 1 of the yoke terminates in the-movable or adjustable contact point 8; the knurled barrel I being employed for adjust: ing the screw bar in customary manner. f

best'seen in Fig. 2 in carrying out my in--;

vention the barrel I is fashioned with an exterior; groove or channel which forms two spaced;- .cirf.=

cular. shoulders or walls In and II that are adapted to receive and retain a pair of rotatablesplit resilient rings, orhigh and low indicators.

which q are. resiliently and frictionally coupled together to permit a jointly rotary movementwithin the channel and between its walls, and

also to permit relative movement of thertwo rings within the-.channeL-as an aid in setting the instrument. v r The forwarder front indicator ring l2, which.

has an exterior diameter slightly greater than the outerdiameter of the barrel, is equipped with a short lateral pointer 13 flush with its exterior periphery, that projects longitudinally of the barrel for =co-action with the taperedscale-Lf This indicator ring of elastic or resilient ma:-

terial is split at M so that it may readily be fashioned with a plane front face for frictional contact with the wall In of the channel. The rear, or coupling face l5 of the ring is serrated, or provided with radial teeth for co-action with an intermediate coupling ring or expander [6, which is fashioned of resilient material and split at M for mounting on the grooved barrel.

The body of the coupling ring is fluted. as at I! to provide double, or dual, serrated faces, that co-act with a second, similar, indicator ring, as well as the ring 12.

,The second ring [8 of resilient material is also split for readily slipping into place, and it is the first ring to be seated in the channel, after which the coupling ring I6 and the front ring ii are successively seated.

The ring [8 is mounted in the channel with its plane face in frictional contact with the wall I I, and this ring, which is equipped with a longer longitudinally extending, outset or offset pointer l9, is'provided with a serrated face 20 for comicrometer including the rotary cylindrical baraction with the resilient expander or coupling ring it. As indicated in Fig. 1 the pointers l3 and I9, although of varying lengths, terminate jointly for magnification with the graduations of the scales, and the ofiset or outset relation of pointer IS with respect to pointer l 3 permits relative movements of the pointers without interference.

The resilientintermediate expander or coupling ring in frictional engagement atits opposite sides with the two in'dic'atori" rings exerts siifilient pressure'orforce to create the required friction for retaining the three rings in operative relation. By grasping the three rings between a" thumb and finger they may be jointly revolved as or rotated, and with equal facility a selected one of the indicator rings may manually b'etiifnd with relation to the other ringandthe b arrel;- i j in calipering operations in connection with the adjustment of the two contact heads by nie ans of the operating screw.

Having thus fully described'my itiVefition ,-'What ric-ia-im as new and desire to secure by Letters; Patent'is: v I a l, Ina micrometer of the opposedcontacts and screw operated type, the combination with rings inou'nte'd the channe -mt ictiohal engagement with the walls, pointers rigid with said rings, respeo'tivel fi and -eiiteiiding l'ateral-ly from the same toward the scale and 'a 'split'elastic cou ling ring-between and" f "ict'i'onally en agin said iridicatr rings: 1

aid fr' Setting a an dineter'inclilding' at liaif'el hayinga graduated scale afidexterior laterally spaced annular wans, a plurality of in? 013051561 rings each having a pointer extending to:

were the scale; said ringsfritionally engagingasezese barrel.

said walls, and an intermediate elastic coupling ring frictionally engaging adjoining faces of the indicator rings.

4. In a micrometer of the opposed contacts and screw operated type, the combination with a barrel having exterior annular walls spaced laterally thereon and a graduated scale, of a plurality of indicator rings each mounted in frictional contactcwith a wall respectively, a pointer on each :of "aid rings extending toward the scale, said rings having serrations on adjoining faces, and an intermediate coupling ring having opposed srrated faces in frictional engagement with the serrations: of the indicator rings.

, 5.. ,In a micrometer of the opposed contacts and screw-operated type, the combination with a barrel hayingexterior annular walls spaced laterally thereon and a graduated scale, of a plurality of split resilient indicator rings mounted in frictional contact with said walls, respectively, a pointer rigid witl'l' each ring and extending towara the scale,- s'aidfifig's' haying Se'frati0hs"on adjoining faces, and an intermediate split re snient cou ling ring having opposed serratedfaces in" frictional contact With theserrations of the 111- dicator rings; I 6.- In a micrometer of the opposed contacts and screw operated type, the combination with a barreLhaving exterior annular walls laterally spaced thereon and a graduated scale, of a plurality ot indicator rings frictionallyengaging said walls; respectively, and resilient means between adjoin ingifaces'of said rings whereby said rings may: berotated Jointly orrelative to each other onsaid GORDON E. CLAUSER.

. REFERENCE-s CITED,

'lhe following references are of record in the file orties;patent-5 l V H fieurreojsrmss ensure Number Date Name 2,107,222 Summers Feb. 1, 1938 25 4337 Drucker annals; Aug. 15, 1944 PATENTS i hlurnber Country Date 139,295 Great Britain es: July 31-, 1919',

1 135,051, Great Britain :2 NOV; 20, 191-9,

Images