Page 2 Advertisements Column 3

Globe, Volume XXIV, Issue 2583, 18 July 1882, Page 2

NOT QUITE) 80 DECISIVE AS IT WAS BUT A UTTLK MORS OVJEfcV WHELMING. WJS CHALUENGH) the representative of the Singer Sewing Machine Company, or any of the jurors on Sewing Machines at the Exhibition who voted for the report coming from that body to controvert the following stateraent of facta. , Meesrn K'oddinga, Cunnlogton, Dale, and 1 Kirk, wa call upon yon to defend your report, H. C FISKE & CO. Chrietoharch Interactional Exhibition, Jnne 15th, 1882. REPOBT OF COMMITTED OF EXPERTS.

To H.C. Fiskb & Co. EAK SIB, —In accordance with your request, we have examined the New Davia and the Hew Singer Sewing Machines, for the purpose of comparing them. In onr comparison we have takea Into consideration— 1. "i he mechanical principle involved 2. The quality of the material used 3 The decree of workmanship exhibited 4 The facility for doing a good aod varied o ass of work. After taking both maohines asunder, carefully examining every piece, and fully testing their capabilities, we have no hesitation in saying that we consider the Davis far the superior machine of the two. Our reasons are as follows : In both maohines the same method is adopted for actuating the needle bar, viz., a crank with roller working in a cam. This 1 oam In the Davis Machine is cot ont of a solid piece of steel and hardened, while In the Singer it is not only very much lighter, hat Is made of common oast iron. The feed apparatus of the two maohines ere very dissimilar. That <cf the Singer Is the usual slip feed. The Davis has the •vertical feed peculiar t» Itself. In this arrangement the pressor foot holds the material firmly down till! the needle has reaohed its lowest point. The pressure is then relieved and transmitted to the feed bar. Feed bar, needle, and material are then, by a very simple contrivance, moved forward simultaneously the required length of stitch.

Motion is given to the shuttle In the Davis machine aa follows An eccentric at the wheel end of the main spindle gives motion to a vertical lever. This in turn transmits it through a ball joint of ingenious construe tlon to the only moving part under the machine, a pivotted lever having at its end an adjustable shuttle carrier. In the Singer Machine a pair of mitre wheels drive a vertical spindle, having at its lower end a orank, A connecting rod from this crank moves a sliding shuttle carrier. It will be seen that in the Davis there are between the main spindle and the shuttle four points of friction, the pivot carrying the vertical lever, the eccentric, the ball joint, and the pivot of horizontal lever. The two movements, the eccentric and the ball joint, are adjustable, and the parts most liable to wear are made of hardened steel. To compass the same work the Singer employs as points of Motion the teeth of the mitre wheels, the two journals of vertloal spindle, the two ends of the connecting rod, and the sliding shuttle carrier None of these places are adjustable. The small wheels are common cast Iron, having a certain amount of backlash, and consequent tendency to rattle and and break. The connecting rod id a thin bar of iron, with a hole in each end. The end whioh runs on the crank pin is one of the prinoipal joints in the machine, having a considerable amount of work to do with small bearing surface, making it very liable to wear, while, as before remarked, there are no means of compensating for any wear. It will be notioed that the shuttle of the Singer Maohine is carried in a slide, to whioh a lateral strain is given by the driving rod, causing a certain amount of Motion, while in the Davis it is oarried by the lever quite free from Motion. With the exception of the small roller working the needle bar, there ia not a single piece in the Singer Maohine, not even excepting the shuttle, that oa.not be out with an ordinary pooket knife, and there are no means of adjusting any wearing part. lii the Davis not only are most of the pieces) made of steel, and tempered, but at every essential point means are provided for taking up any wear. X)n this point we may say that where we had any doubt about tho quality of the material employed the the pteoe was broken and the fracture carefully examined. Having examined the mechanical arrangements of the two machines, we tested their adaptability for work, and we notioed the very peculiar f 3cd c& the Davis. In this respect wo have been forced to the conclusion that for all purposes, sewin from the thinnest muslin to even thron h a metal spoon, the Davis has no paralle grasp, or for avoiding that puckering often the effect of the pressure on a fore motion feed. We must in common honesty express our astonishment at the range and variety of work accomplished by the Davis, whioh we are satisfied cannot be done by the Singer. In summarising our report we repeat tha.t we have no hesitation in saying that we regard the Davis as very superior to the Singer In workmanship, material, and the mechanical principles involved, and also in performing a greater range cf work. We found the Davis to work with equal eaeie from the lightest to the heaviest fabric. JOHN LEE SCOTT (Scott Bros.), Meohauical Engineer. T. GLUYAB PABCOE, Manager of the Kaiapoi Clothing Factory. GEO. P. ANTHONY, Mechanical Expert, from Hettlefold's, Birmingham. 8300

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