WORK: Vol.1-No.51 - Tools for Working Wood

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••-•I812••SHOP.[Wo1·k- Mart.h 8 I{• tpreiJariDg spoolfl.cations, which must be written induplicate ~n the properly authorised forms, andaeoompanie(l by th~ stamped application form. Ityou merely protect a Bha;>e or desi~n, it is probablethat you n1ay rcqwre protection under theDesigns Act, and not under the Patent Act. Shouldyou obtain Provisional Protection under the P atentA ct, it stands ~ood for nine months from the dat~of the applioauon, when the complete patent mustbe applied for which will remain in force for fourteenyti(U8. l'be protection for o. design is onlygiven for a period of five rears.-R. & C.Bronslng »"labfng Tackle. - BRO~Z.tNG(Leeds).- I am sorry you have been k ept w~1tmg,but your Jet,ter in51uiring about ~he b~on3m~ . offishing tackle, etc., must ha>O llUSCarrled: rhesuQject l1as, however , been brO\lgh t forward m th~seoolumr.s in answer to other correspondents. Chl?ndeot antimony applied to perfectly cl~n a~d polishedbrasswork will produce a charmmg v1olet s~elcolour, which I consider most suita ble for fishmgreels. rod mountings, etc., but '~hether the makersof such articles, or the conno1sseu1-s nmong thefishing comm unity, w ould approve., is an~ther ~l.a tter. 'Try it, however, before you dec1de. I hebrass should be tllrned up quite bright in the lathe,or" dipped" in the usual way, then heated m od er·a tely, and the chloride of antimony liquor a ppliedwith a rag until the work i.SI eYenly coloured. when itshould be polished \Vith ll perfectly dry soft clothand lacquered with cl~ . e.. colourless-lacquer.-0Plf' EX.Wbeel Gea.ri.ng.-G. R. (Dm·ham).-The datayou gh·e nre altogether insufficient. T o desi~u thewheds it is .necessary to know the a mount of forceto be transn1itted in order to determine the sizes ofthe wheel teeth, and of t he driving chains nndother parts. The ratios of the diameters of wheelsto get the desired increase of speed will be asunder :-.Assuming the '!heel, of which the c irCUf!l·ference is to run at 40 ID!Ies a n hour, to be 6 feet mdiameter. i t w ill make 200 r e'l"olutions a minutenearly. There must be a pinion on t he shaftgeared to a wheel 5 times its diameter on thenext shaft, which must carry a pinion gearedto a wheel 4 times its diameter, carrying a pin!on2~ times its diameter fixed on the shaft, wluchis to revol ve 4 times a minute. If you let rueknow the class ot machinery, if the size of thefi.rst or last wheel is settled, and the po,ver to betransmitted, I can gi\'e you definite informationfrom which you can work. Four revolutions aminute is r emarkably slow for any kind of machine,except, perhaps, a water wheeL-F. C.Magnetiaf.Dg SteeL- FLAX SPINNER (Lonutor1).-In your former letter, sent m e in July last., youasked for ~formatio!l r especting the means .to beemployed m d evelopmg the greatest power ln anelectro-magnet. From your letter just to band, Igather that yo u wanted something different stlto·g ether . Why, then, make a mystery of your realwants, and enjoin me to sccrecy1 T here is uoeecrct about magnetising h orseshoe mn~;nets. ~rremagnetising them when they have lost the1rm agnetism. You won't get a patent for the process.Make a. pair of hollow bobbins, with holes in themto fit the legs of the magnet. To dc\·clop thegreatest power "i n the magnet, wind on thc:>eenough No. 20 cotton-covered wire to make 'thewhole three times ,the diameter of the hollow core.\Vind one bobbin from right to left, and tl!e otherin the contrary direction. Connect the two togetherwhen on the legs ot the magne t, and sendthrough them the strongest current at your command.The current from your 10 'Valker cells inseries will d evelop considerable power in the smallsteel magnets. See also replies to C. E. B. E. (EbbwVale), V. R. (Li1Jerpool), and ANXIOUS (Liverpool).I do n ot forget to answer the letters of correspondents.Every letter received has m y prompt andcarerul consideration, but my replies cannot getinto print as soon as you expect tbem.-G. E. B.Maguetto Bxploder.-A. C.-I do not know theoondiLions necessary to etfect the explosion of benzineYapour by means of a. magnetic exploder, socannot tell you how to make the instrument. Ihope to give an illustrated descl"iption of a. smallm~netic dynamo in a future number of \\"OJm:.a nd this may possibly suit your purpose, a~ it willmake o. wire white hot, nnd gi ,·e sparks. I cannotgi\·e vou uuy idea. here iu a few words h ow ton.ukc' the machine. so must ask you to wait untllic.xpluin it in detaiL-G. E. il.Shocking Coil.-J. B. P. (b·thlinaborou{lh).Have YfJil not lll·ard thnt •· e\·crythiug comes tot ll••'ln w hQ wait ?.. Thl' Limited" (the word "limited •· con,·eyJng thesum~ information here ns the wor~ •· merchants;;in your case), or •· Eastmans, .Amen can ~utcbers.a. company which has a shop m almost e' ery 18.11(8town in the kingdvm.-H. L. B.Photographic Sl\des for the Maglo Lantena.- J OH:\ BL"LL asks the following question.s :-"Howto make photographic slides for the magtc ,!ant~rn,and can they be made out of the P!ates1 Now,l\Ir. Eclitor. I do not want to de>elop mto a~wierin nw old n~;e, but will you allow me to ~)JUS aword in protest agn!nst such Yague quesuoi?s1 ~tis a common fault w1L!l persons to ask queso~s;:sucb a way that one 1s. at a perfect loss to '{;inwhat is w anted. I behc>e that the art of .as. ~ques tions is one that few understand. ~hetr ~anis palpable enou~h to themsc)\·e~! .but mt~;~ t~hanl not the power or are unw1lm~ to e C retrouble to place the idea-the word p1ct_u~e-r:.~inthe mind of another. Now, I um not w_rlllng · \utan unfriendly S(Jirit, or through cnpl!O~lsdess.d tothat our mutes in the ·' Shop" '::nay b_e lO u~etiiUestate their wants clearlr. as 1 ~ w1ll Ba' e muc don the part of tho::e who de ~u·e to he_lp the~~· ~f\'cry often much space in \\'OKK-Whi ~h.ts cl ~ustgreater ,·alue. Now to refer to the que::.tJOn. t ke apresume a. g reat deal: first, that J , B. ~aum:k e ancgath·e. etc. 'Io take a traospa_rc~Cl. ~wood tube. 5 ft. l~ng and 3i square dn sll~: r~~~:;ment. Half an Inch from one en g to form asmnll angle pieces ~n the corners, 5 ~t l:"t1le pictureledge for the negative to rest on,~ hte on this,side towards the end .. No'~ layfa "~'*C;t Pb with thebut separated from 1t by ru o an.l~c. fasten thisprepared surface towards tbe.cal nega.ti~~s that Jll&Ym its place by any mecham md . light-proof,snf'Cgest itself. S~etng thda tJ~ethC: tu~e towards abring it into the light, anre must benorth light if possible.. Length of fi:gO:Conds; dedeterminedby experiment-saY v tJuessed UJ,eYelop in the usual war. If I. ba\'e no distiD~right answer, please usk aga!lld, ~n
]Wo.rk-ll[aroh 8, 1890.]:aeotrlo Breast Pln.-QuocUNQUE JECBRISSTABJT.-An electric breast Jli~ is made up_ of o.• very smnlJ incandescent clcct1'1C lamp SOt m auornamental met.nl setting, much as o. stone would beset in a scarf pin or brooch. ,'l'he tiny J:::lobe ofglass, the size of a large pen. 1s very !1'Ug1le, andt:aD only be 1\xed by .a skilled workman truined todo such things. Cennection is mo.do with the twotinY terminal wires of the lamp, at the back of thebrooch with a small ftexible two-wire cord, lending.to a small battery kept in. tho brco.st pocket of the. coat. The lamp itself. will, prob11bly, C~?St you 5s.,and you can get the pma for 7s. 6d., so 1t w!>uld bescarcely worth your while to attempt malnng oneourselt tor you would run the risk of breaking~ ~ne or two lamps in the attontpt.. Respecting the' battery, see replies to AscA (.Newcastle), V~;:Nus1 (Nonoichl, and H. E. (Lciccste?·). Small 11ccumu-_ Jator cells are sold for tho purpose llt £1 each.~ G. E. B.Teleplaone Magnets.- D • .A.. C. (.il bc1·dcen).-I· a m very much pleased to flr~d that my artic!e on the1 telephone has been apprec1ated, and that 1t seems.to have raised a n interest in this tlubject o.mong thereaders of WORK. 'l'be magnets which you inquil·oabout and suitable for your purpose, can be l1adfrom 'Messrs. King, Mendhum & Co., mnnufuctidingelectricians, Western Elr.otrical Works,BristoL The size is 5 in. by i in. (the Corm isround), and the price is l Od. each; if fitted with adjustingscrew 4d. each extra. I am su1·e you wouldbe able to purchase such magnets in .Aberdeen. If· you cannot get them the exact size and make, takethe nearest thereto, and make the other pa1·ts tosuit. Why not make them yout'Self1-W. D.. Fret .saw and Lath e.-1\JEN~>rcus (1\"ewcastlccm-Tvne).-Asa rule comblnlltlon tools and appliancesare not so satisfactory as thos e which areaimple, and I do not think xou will find fret sawsand lathes any exception. !'he combinations, bowever,are by no menns useless, Cor ,·ery fair workcan be done with them. 'rho principal objection Ihave against them is that the lllthe is of sma.llsize and power. The Goodcll and Companionlathes are the best in this respect, but the Sll.\\ingarrangement is not of the best. If you want areally good fret-sawing machine there is nothingto eqnnl the Britannia Co's. No. 8. '1'his, however,ha9 no lathe · att.aohment in the ordina1·y wn~' .- though the manufacturers will supply one whendesired, and from tl•e unusually ltaavy flywheel ofthe No. 8 you will l•o able to manage anr turnedwork which could reasonably be expected from asmaU lathe. I shoulcl, however, strongly recom.mend you to have lnt he and fret saw ns separate• a rticles, for though ut somewhat extra cost youwill secure far ~rcO.h-1' elticiency. The same eo m.pany's multunt 11~ parvo lnLhe is a really practical• one at a small price. J.ct me say that you ure notaltogether correct in st11ting tbo.t the finest class offretwork cnnnot be undertaken without the aidof a machine. Ae o. tnlllL0 1' of fact the I! nest work-L viz., that in connection \\1th inlays of veneera-isdone with the hand frame. .A good machine isquicker and more powerful than this, but that. is all.- D. A.lledioal CoU.- W. B. C.-(1) .A 3-in. coil shouldhave a core 10 in. in length by il in. in diameter,and be wound with 2 layers of silk-cove1·cd 1' o. 16B. ~~.G. cop,per wire, weighing about ~ l b., llS apnmary. The secondary may be wholly of 4 lbs.No. S2 silk·CO'I'ered copner wire, or made up in 3powers, with 1 lb. No. 3'2, H lb. No. ~ o.nd 1l lb.No.36. (2) Chromic acid is preferable to bichromateof potaab_~ because it does not deposit crystals in thepores of we ba\tery plates. S oz. of chromic acid ina \)int of water, acidulated with 3 oz. of sulphuric&cl:er, anQ. by !DOVing it to the right the bridgebro.. en a~d the bell awitched otr. The switchbe p ut.bt mclany part of the circuit between theand e ock; or between the clock and t.heSEOP.battery, wherev-er con,·cnient to you. You lmveonly to cut the wire ut the spot where you wish tolb: the switch, and connect the bared and cleanedends to the two parts of the switc h- one to the u1·mph·ot and the other to the screw of the bmss stop.You may ma.ke the base square if you like, und mayfix all the w1.rcs to tl1e fuce of tho buse inslenrl ofthe back; but this doell not look neat.. otherwise itwill work egunlly well. R especting the lattice unn.the pillar (l
Page 1 and 2: - I I'• •••••••Q\n
Page 3 and 4: A C,JRYED B ·REAU.I ought to mt NI
Page 5 and 6: . \• •• •Work- March 8, 189
Page 8 and 9: ••' • ••· THE l(ALEI.DOS
Page 10 and 11: 8ro. ' '•' .'• •• ; •' .0
Page 14 and 15: •• •••eo that ft le quite
Page 16: ' '••816 A DVERTISEA!E.NTS.W'

WORK: Vol.1-No.51 - Tools for Working Wood

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