IMAGE EVALUATION TEST TARGET (MT-3) {./ :/. 1.0 I.I fcaiZS |2.5 ! 1^ 1^ m 1-25 IJU 1.6 u> ^ /a Photographic Sciences Corporation 33 WIST MAIN STRIET WIISTIR.N.Y. 14510 (71«) •73-4503 ^< iV L1>^ c\ \ % CIHM/ICMH Microfiche Series. CIHM/ICMH Collection de microfiches. Canadian Institute for Historical IVIicroreproductions / Institut Canadian de microreproductions historiques ^ "'mmtn^^ Technical and Bibliographic Notes/Notes techniques et bibliographiques The institute has attempted to obtain the best original copy available for filming. Features of this, copy which may be bibliographically unique, which may alter any of the images in the reproduction, or which may significantly change the usual method of filming, are checked below. D D D D D n n n n D Coloured covers/ Couverture de couleur Covers damaged/ Couverture endommagde Covers restored and/or laminated/ Couverture restaurde et/ou pelliculde Cover title missing/ Le titre de couverture manque Coloured maps/ Cartes gdographiques en couleur Coloured ink (i.e. other than blue or black)/ Encre de couleur (i.e. autre que bleue ou noire) Coloured plates and/or illustrations/ Planches et/ou illustrations en couleur Bound with other material/ Re\\6 avec d'autres documents Tight binding may cause shadows or distortion along interior margin/ Lareliure serr6e peut causer de I'ombre ou de la distortion le long de la marge int^rieura Blank leaves added during restoration may appear within the text. Whenever possible, these have been omitted from filming/ II se peut que certaines pages blanches ajouties lors dune restauration apparaissent dans le texte, mats, lorsque cela dtait possible, ces pages n'ont pas ix6 filmies. 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I I Coloured pages/ D Pages de couleur Pages damaged/ Pages endommagdes Pages restored and/o( Pages restaurdes et/ou pelliculdes Pages discoloured, stained or foxet Pages d6color6es, tachet^es ou piqu6es Pages detached/ Pages ddtachdes Showthrough/ Transparence Quality of prir Quality indgale de I'impression Includes supplementary materii Comprend du matdriel suppl^mentaire Only edition available/ Seule Edition disponible I I Pages damaged/ I I Pages restored and/or laminated/ I 1 Pages discoloured, stained or foxed/ I I Pages detached/ I 1 Showthrough/ I I Quality of print varies/ I I Includes supplementary material/ r~n Only edition available/ Pages wholly or partially obscured by errata slips, tissues, etc., have been refilmed to ensure the best possible image/ Les pages totalement ou partiellement obscurcies par un feuillet d'errata, une pelure, etc., ont 6t6 filmies A nouveau de fapon d obtenir la meilleure image possible. is filmed at the reduction ratio checked below/ iment est filmi au taux de reduction indiquA ci-dessous. 14X 18X 22X MX aox 12X 16X 20X 24X 28X 32X The copy filmed here has been reproduced thanks to the generosity of: Library of the Public Archives of Canada L'exemplaire film6 fut reproduit grAce d la g6n6rositd de: La bibliothdque des Archives publiques du Canada The images appearing here are the best quality possible considering the condition and legibility of the original copy and in keeping with the filming contract specifications. Original copies in printed paper covers are filmed beginning with the front cover and ending on the last page with a printed or illustrated impres- sion, or the back cover when appropriate. All other original copies are filmed beginning on the first page with a printed or illustrated impres- sion, and ending on the last page with a printed or illustrated impression. The last recorded frame on each microfiche shall contain the symbol —^-(meaning "CON- TINUED"), or the symbol V (meaning "END"), whichever applies. Maps, plates, charts, etc., may be filmed at different reduction ratios. Those too large to be entirely included in one exposure are filmed beginning in the upper left hand corner, left to right and top to bottom, as many frames as required. The following diagrams illustrate the method: Les images suivantes ont 6t6 reproduites avec le plus grand soin, compte tenu de la condition et de la nettet6 de l'exemplaire film6, et en conformity avec les conditions du contrat de filmage. Les exemplaires originaux dont la couverture en papier est imprimie sont film^s en commen^ant par le premier plat et en terminant soit par la dernlAre page qui comporte une empreinte d'impression ou d'illustration, soit par le second plat, selon le cas. Tous les autres exemplaires originaux sont film^s en comment ant par la premiere page qui comporte une empreinte d'impression ou d'illustration et en terminant par la dernlAre page qui comporte une telle empreinte. Un des symboles suivants apparaitra sur la derniire image de cheque microfiche, selon le cas: le symbols -^^ signifie "A SUIVRE ", le symbols V signifie "FIN". Les cartes, planches, tableaux, etc., peuvent dtre film6s d des taux de reduction diff^rents. Lorsque le document est trop grand pour dtre reproduit en un seul clich6, il est filmd d partir de I'angle sup6rieur gauche, de gauche d droite, et de haut en bas, en prenant le nombre d'images n6cessaire. Les diegrammes suivants illustrent la mithode. 1 2 3 1 2 3 4 5 6 COLONIAL ENGINEERING CO., Limited, Consulting and Contracting Engineers. 222-224, St. JAMES STREET, - - MONTREAL. Machine Cut Double Helical Wheels, WITH STAGGERED TEETH CUT IN SOLID BLANKS, WUST'S PATENT, .\i'c the Gear for all High-Speed and Heavy Drives from electric motors, steam turbines, etc., and for the safest transmission of liea\y torcjiics, without vibration or shock. They are in successful operation in connection with almost evcrv class of macl-iiner\-, and their ad\ai-taijes are particularl}' apjjreciated when dri\ iiiL; : Pumps and Compressors, Haulages, Rolling Mills, Machine Tools, Calender Rolls, Elevators, Conveyors, Woodworking Machinery, Textile Machinery, Coal Screening Plants, etc. sft Spill Wliei'l .mil Split riiHiiii Jill, pitch liy uin. f;ii c;. Tlutsi: (icars have the folhnviiig aclvantag(!s over Siraioju Cm W'liccls I. riii'V arc Kiiisuk'ralily stniiigcr lliaii strainhl ml uliiiU 111 similar ilimi'iisiims. nwiiig In tlif yrcalcr iucrayi' ciihmhi - tin'iil. aiiil I" the liMilli iiri'ssiirc attitit; at .1 iinic li Miiallri IcviTaHi' than with -.liaiKht cut U'clli. riicv 1.111 s.ili'ly nm at the lii^^hot M'lnutir', (tip III '111 h'l't prf •>i'iiii|il) witliiitit any ilailniT. ,1-. Ihcv iln Mill M't lip \ilif,iliiiii riiis IS dm.' Ill llic lai t that pinion .iinl wheel ilii nut '.uilik'nly tiiim inlu aiul uiit nl ciiyaHi'- iiu'iil as in --ir.UKliI wliccls, whilst tin- Inlal riif^.i^cmcnt 1^ practicallv cnnslaiil on accniinl nl thy >taKK<'rri| ,nraiit;i'iiunl 111 lhi> Iccih. y Owinyln Ihr cnKiiuciiiiiit liriiiK ^;iailii,il. Ihr lictli ,111 licit siilijcci In llic lianinifrniH actum sn lifipiciitU imt with 111 straiHJit cut f,'cars. wluTc iincvcii Innpii's have in In- iransmillccl, .Much liiUT pilclu's can lie cmplnyi'il than usual in siraiKlit cut near pra( lice mi .iccniinl nl urcatci stifiii^th .iiiil Ini'lnm Irmii slmcUs. 1 Ihcv .lie tar siipcrinr In raw linle .u'll paper v\ heels 111 pniiii nl ilmaliihly ami ■.trciiKlh- ; rhe\ .ire le->-. nnis\ til. in ,1 liy nl llel I y pe nl -.pill- ^Cll , ,inil when riiniim;; in ml liatli .iiul balanceil with i.iie, tlie\ can lie cmisiilcrccl as |irac tic.illy nmseles, Iln-. l■^ .ucmiiiteil Inr liv the yiailiial eiieat;emeiit ii I he ^t.lHueniie 111 the teeth piniUlce^ the ^.iiile elleit .|. li.iK iiu ll"' pill h ami ilmilihiiH the iiiiiiilier nl teeth in ^iraiuhl vvheeK, lull wilhnul the I nrrespnmhiiL; reilm timi in sircllKlh I lie\ pn-.^es> the hlKhe^t elluieluy |i\ le.i^nii nl the .ilinnst iiilliplete .llisemc nl shillllK Iriitlnll s I liev Vernier the use nl IuhIi r.Llin^ nl reilm tmn lietween piiiimi anil wheel pcissilile wulicnil any clanger nl r.ipiil wear nf nmsy transmissinii. Single near r.ilins ii]! in _■ ; i .ire .ilre.iilv III sm cess I 111 iiperatiiin. Tiit-y .iret Ilea per i h.in iii.n lime cut ciniililc helii.il wheels .IS hitherln tii.nle. We supply these wheels in sizes up to 14 feet diameter and 3 feet wide with highest accuracy. I.e.inet No. (iS COLONIAL. ENGINEERING CO., Ltd. MACHINE CUT DOUBLE HELICAL WHEELS li;i\u lony been ii|4)iL't:i:itcil, but ihc did pim c^^o nl in.'ikiiv.; tln/iii. citlicr l)\ bdllm^ liij^cilu-r oik: i ii^lit-haiul ami oiu- k'fl-li.uid helical uliccl, or b\' milling out llic Icclli ^in^h by iiic,ui> of a ^m.il! iiiiliiiii; ■inter. in.iUc ilic ulifcli not only too c\pensi\c but do not admit of the hif^lic-^l .k i ur.icy Our process of cutting Double Helical Wheels in one operation on a special double generating machine (Patent) ensures that high degree of accuracy, without which this type of gear has more drawbacks than advantages. It ensures absolute uniforn\ity of all the teeth of a wheel, and theoretically accurate shape. The process is applicable to solid and split wheels, and the smallest pinions as well as the largest wheels are being cut by the same tools. Double Helical Wheels should lia\\' .1 i^ical uidtli in iiKipoi licii to their piii h. ( )m nuiiiniinn standard uidili ii ei|ual to si\ tinio the pitch. To avoid delay, enquiries and orders should always contain the following particulars: - I'ouer to be irauiinitled b\ L;ear \u ll.ll.l'. Speed of drivini; sh.ifi. Ratio of reilui tion. l)i-.taiice betueen centre-, of ^h.ifl-^. If po^^ible a (eitain inarj^in should aluay^ be allowed . I'itc h and uiilih of face, if decided upon. Diameter of bore of pinion and wheel. Length ol bo^s, whether llu■^h uith the nni or exuiided cm one or both '..icle>. Dimension^ of keyway> : if ue .nc expected to cut >,inie. II possible, sketch sliouinji the at iaiij;emenl recpured. .Niindjer ol wheels of one si/e to be ordered ,it out' tone. W'liether wheels .ire to be --olul or split ENQUIRY FORMS WILL BE SENT ON APPLICATION, We call special attention to our high ratio Single Reduction Gears, and to our patent " D.R," Gears, which have all the advantages of Worm Gears without any of their drawbacks. f«ttft,t,^ Self 1 c'llLlUlcd ShIkIc i