US1262761A - Draft-gage. - Google Patents

Description

L. M. ELLISON.

DRAFT GAGE. v APLlCATIUN FILED FEB- 2,1917.

Lm; Y Patented Api. 16s ma T" 'ille i i dei@ a fitr RAET-GAGE.

ineen-ei.

Application filed February 2, 1917. Serial No. 146,098.

To all wtom it may concern:

lBe it known that I, Lewis citizen ofV the United States, and resident of Chicago, count-y ot Cook, and State of Illinois, have yinvented certainl new and useful Improvements in Draft-Gages, of which the following is a specilication and which are illustrated in the accompanying drawings, Jforming 'a part thereof.

The invention relates to draft gages and has iolits object to provide. an instrument for this purpose which is of improved construction particularly with a vienT4 to secur y ing greater convenience in use and to reducing the liabilityto injuryin service. rllhe invention` is exemplified in the structure to be hereinafter described and which is illustrated in the accompanying drawings, wherein- Figure 1 is a vertical sectional rien', the plane of the section being indicated by the line 1-1 on Fig. le.

Fig. 2 is a trent elevation,

Fig. Bis a side elevation with the attac ing lug's and a detail of the supporting'part shown in section, v

Fig. 4 is similar to a detail of Fig. 3, but shows a different 'form of attaching device, and

5 is a sectional vien7 taken on the line 5 5 @t Fig. e.

The features 'of improvement are illustrated in connection with a scale tube gen-4 :ally designated 10, made in the forni of a. ti and having a bulb 11 at the upper end of one of the legs, as l2, of the U. The other leg, as 13, hereinafter referred to as outer leg of the U tube is extended in front of a graduated scale 111. Preferably the tube 10 and the scale '1l are inclosed Within a metal case 15 to which a glass front 16 is applied.

'in carrying out the invention the U tube it() is constructed to permit of the scale 'lli and the associated part of the tube being located close behind the glass front 16 of the case, vvitlwut requiring the case to be of great depth. rihe indications upon the scale le are thus more readily observed and when pointers, as 17 and 18. are placed over t`.e glass front 16, the importance of taking the reading from directly in front of the scale and from the enactvlevel oi the pointers, is reduced. As shown, the bulb li is 'of an upright cylindrical forni and the axis oitl the bulb is suliciently odset from the lineof the Specification of Letters Eatent.

M. Ennison, a

outer leg 13 of the il to be located a substam tial distance in rear ci' the plane ot the scale 14. ln `order that the chamber olf the case 15 may be of reduced depth in all parts., eX- .cept that part which incluses the bulb, 1l, the inner leg, as 12,01 the il tube 1() is preferably .located at the saine distance freni the glass front- 1'6 as the outer leg 13. This is readily brought about by providing an elbow 19 for connecting tbe upper end ot the inner lee' 12 of the tube with the bulb 11, the connection being 'thereby inade with the iront wall oil; the bulb 11 adjacent its lower end.

ln the usual operation of the device when made in the 'jorxn shown, the cliainb r of the bulb 11 should be open tothe atmosphere. Under these circumstances it is desirable to prevent the ei'itrance oi dust intolthe bulb chamber. As shown, the formed with a socket 2O atits upper id tc receive the top of the bulb il and the rirn oi? the Ibulb is firmly held '.thin 'the socket 20 by al cement paclingll. A

vFor the purpose of venting the chamber of the bulb 11 Withoutpermitting the entrance of'dust, the end wall of the socket 20 is formed with a tubular nipple and a vented dust cap, generally designated Q3, and having a threaded stein is appted to this nipple. As shown, the upper end oi the dust cap Q3 is formed with a chamber 2li and a tube ,rises into this chamber, the bore of the tube being extended through the stein 50 of the dust cap to connnunicate with the bore of the nipple 22. The 'cnainbor is closed at the top by a reinoval'ile solid cover 26, but an opening 2? is prcvided in the side Wall of thechainber at its lo'ver end. 'it ifollows from this construction it' a suitable dust filter is provided in the chamber 524, as by filling the said chamber with a. loose packing of cotton, or the like, (not shown) the chamber et the bulb il will. be vented but dustvwill be excluded. lireierably a screen 28 is extended across the chamber above the opening 2'? to support the sail packing.

d.ln order that the tl tube 10 may be connected with the part to be tested, the upper end ol? the outer leg' 155 of the tube is also extended into a socltet provided in the end Patented Apr. it, dell icev fcmupollely remomg le ci mr fand, the 5mm' 3Q has is, tubular ssm ad @is siem is formed wih :1 nera opening nm'f he buse of the Stem. now, 21 :as @'75, be appiod m @he envoy: 32 at "che n h@ Sen] 3:2 the fhxmaei f he plug 31') w be Seide( when the Cover is Classe-d wl@ mnng back @muy will sew@ npen he chamber ih@ phlg 3G to the aib t sphere Wi'hou' comma-wij.; wmvng Cova/*fx hat the Case Snoulf xzmy damped suppomg surface ai, onj/ a single Ender these ccumszmces zwquai the suppoing Surface have no effect 1 the Coxained As shawn, ik@ case 15 is mmed iashng Eug, as 89, which is to be appied fio the supporting surface, 'dla mung Eug, as 4 1?, being merely la out upon this lug. mwuugy mak@ iii: 1n fh@ neming 4G through l md proviion is made foy pre-- *ma scrcw 44 m' ali bolug inserted ..u' @Dough gim- Hw head o ho :row tu om se bushing. This bushmg may he om piece of meai tune, as 48,

us: puy..

, a cap apphm to h aperure 11 he @mi wail @if the Suu?, socket., the said @ap boing @hmm beruf o 'eceva a. @ausi iler Mld ik@ hm "bei being vented adjacen, its

owe? onu, :1. tube Y H19 can, he bow of 'the ubs csmnuninb in uolnbnaon? a, i: ,1, (i scr-Lk tube mmme w @hun my fh@ casing, the ende o :hv 'tubo being heid 'in he WaHS of fha Qnsngg, 21 imi? of upclmad lugs forme on the casing malls, one of 1h43 Engr? having a mmm@ fue@ fm engezgj'emn wh the face of a support :md the other ing being ccaed nviwl-yfiu from? @if *bhe plan@ of /he conf'mct face im: engagement Wi h @the sup- 4. In a draft gage, in combinationma," `chambered casing having a Hat glass. front,

a scale tube and connected bulb mounted Within the chamber of the casing, and housed thereby, a part of the scale tube adjacent the bulb being transverse to the axis of the bulb and the body of the scaletube being forwardly offset from the axis of the bulb to extend adjacent the glass front of the casing.

5. In a draft gage, in combination, a chambered casing having a flat glass front and-the chamber of-the casing being of un- I vuniform width from front' to rear, the rear Wall of the narrower part of the chamber being flat, a scale marked upon lthe said fiat part of the rear ywall of the chamber and a tube and connected bulb mounted within the chamber of the casing and housed thereby, the bulb fitting the Wider part of the-l chamber and the tube being offset from the LEWIS M. .ELLISONQ axis of the bulb and extending in front of

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