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Show I ACETYLENE WELDING IS BECOMING RAGE Because it Is f-o eronom !-a! and be- cause it rrearrs relief from vxatious Mva-downs. Mva-downs. be-au:;e it insures tin- utility and I long life of all machin-Tv. no mat;er where I found, acetylene welding is b "otnms: a decided fad with m.'-st owners ar1 indus- ! trial plants. The automobih- d- airs have! for years employed ihi-" e -ori" m j , -;i j fc-n - ! ture in their s'-rvic and r-;iii- -h";is. Now it is sucrec-'jinc ir. all manner of in- j dustries w hrc nia. hi : ?rry is em p-'. 1. , Th1 Monarch Mnt-r .-ompny nm n:' 'fr says that it is adv.!b!e r-t your m-vt 1 lank from this com;-yn'. U"; f-.-i r.;' j I South street, l"-;t! di;-tri-.,i o;- of ib.-j Prest-0-fite a.-t;. :rn.-. '-fllii.g ta-.l-s fori the intermountat n r-'-ion. jto )Tr:ir ii.-, heomin 1uum I uni:t ; le lucked in some war. Kadi eel., for the ln -t thirty or j forty v. ar, many ia'eut.s have I'cen is. - ip-'d on nut lor k i n j lie viers-, vho w i ,tliai thi- pin pr-iidrm wlii.-h has not 'd 1 n s,,-.,., .niir-r it':n-t ion, : l-nt ot th----- t!i" ..- ... aine.i her.--; i i : ii m. with .-. f.-u- . -pt mn", ! l,r i on ly "in h;--i :i re i.-.t. Ilm-h of t lie--- J , i. u.'d in -,MTi:!t ;imi M,m.' of slipped oer the bolt and t!i- nut tiicn I screwed tiuhl. The illustration sho'vs the position of th" washer when the nut is still a little loose. Note how tlie bent ends A and II ri";l, one against the nut and the other against the metal ot the part b. in- held. When the nut is screwed tlnht. thee ends will di' in. So that to ihm'pmv the nn f , some of t lie metal w ill have t' be torn away before j the nut will turn. The be loe I, w a - hers n re erv surrrv J ful on the whob', but arc not ubsoluleK reliable. If the bolt is. hn and tub-ji tub-ji eled io much vibration, r if the load m it is inl ernii 1 1 en t , ns a Mow-, the bolt may Mretch, and so tlie pressure on the washer will be deereast d and the nil! may turn. It is necessary, therefore, to periodically test the nuts. I his type of washer should not bf used in places here it cannot be iT"t a I and tested. Hard-'ned sf.'.-l is liable to be brittle, and as the lock washers have been tempered, tem-pered, w hieli w e miejit say is part )v li.'irdcned. thev are vt ry liable to break if subjected to a shoe'k. 1'or this rea pen. t h- must toil bo used on the con-m-clin rotU, main bcarin-j? or bkc import im-port a u i mo i n - pa rt s. When r; r'd on a tl-roult bolt, one should ;i!mi be put under t he bob head. Y her" p'.ssible J he al c ! la t .'d nut c v p!.ii u d r.c i :huhl be us.d vi!h the through bolt. It is a -;oo.l pracii.e to carry a box of assorted lo.-l; washers in the tool kit,; and when, on taking off a mil. the old 1 washer is found to be flat, to substitute a new washer. r.t. alter th lock w a 'di r r. the nut is lockejl by having slots ,-ut in tlie dtp of it. and a small lode drilb'd Ihriui;l the eii-1 of the bdt. and .sticking a cotter cot-ter pin through one s,-i ,,f the slots anJ the hole iii the bolt. Thin h shown in Piynre A nut of 'his type is called a cnMollat d nut. Il is a surer loch than the washer, and is .Tciic r:i 11 v used on important bolt ; and ones which cannot can-not be looked after n'thou; removing other part". The yri-atest fan!; with the raMel la led nut, on side of i t -i h i Ii cost , is ' that it is hard often to i;rt the hole in ! the bolt and the slot s in the nut. in line, without loosen in-; Urn latter. I lianini; the nuts nbout, will often overcome this trouble. Here is a rea son why il pays, w lieu taking off a ' part, to hc row tlie nuts bael; on their! bolts. A oiod mechanic always ,oe ' this, not oiih- bceaiMc lln v will on 1 rasicr, but th danger of llmir becoming becom-ing lost is eliminated t lie rein . Where a number of cap screws (bolt-threaded (bolt-threaded screws wiih hovaeon heads) are esod, especially when placed in a circle, as on the univor-al tlaniri-fi, dif fere n t ia I and clutch spri ny s. thev a re held fast bv drilling small ' holes through tlie head'' of the screws, and I then runiiin:,' a wire through the hole of one screw after the other, as shown in I "ijpire .'I. I ,ea v in g this w i re off is a mistake which many oflm mnlio. When insert in g the w ire the posit ion of the slo'.i should be studied, and the wire inv'-led through a slot -o that i! i will lend to tighten I he screw, ami no; ' loo,en il. I W hen the uul i i of larger diameter, :o. the s!jn!ler lightening mil of the universal, or ndjiMliug nut of the sd-er ! ing iiieehaniim. it iv cu:timat to split . I uul and Io I'urni. Ii it w it h "a smaller bolt so that it e.-u be ( lamped tight on Io 1 he 1 lin-ad-:. nf I rr Immu" t m tu'd " the proper ;i niium t . This i shown i il ! U lull- I I . - .'.I,' 1 ', .1 ii I loc h i ii dc icen, n few per inl 1 y de sitied niii's will Lpnier.illv nl-so lie found. ti" who nndei -ilnnds the jtho e will iiuir- , v wee 1 ltd ju t ion of t lio-'c i m io e i :i 1 de irr A |