5-f.S REI.I. SYSTEM TECIISICAL JOURNAL 



few parts manufactured in large quantities where it is found ex- 

 pedient to group a variety of machines in order to reduce the amount 

 of handhng to a minimum. An example of this is the manufacture 

 of the top part of the desk stand which supports the transmitter, 

 which we know as the "lug holder." This part is made from brass 

 tubing. The operations involved in making the part are. cut to 

 length, burr, several swaging operations, and a number of punch jiress 

 operations, such as perforating, embossing, and trimming. We have 

 in this case grouped together in the proper sequence the rcriuired 

 number and sizes of milling, burring, swaging and h.minuriiig ma- 

 chines and jniiich jiresses. 



I()liHlN(. Sllol' 



We also lia\'e a group of dc])artnKnls kiKiwii coliectix cl\- as the 

 "jobbing Shop" which is equipiX'd to i)erform all the usual machining 

 oj)erations. These departments handle the manufacture of sjiecial 

 apparatus, which is made in such small quantities that it does not 

 pay to make the elaborate manufacturing preparations which are 

 justifiable in the case of hi'a\\' running apparatus lor whicii tiure is 

 an established demand. 



To give you some picture of just what we set out to dn wlun we 

 plan a job, the following flifferent steps or problems wliicli must be 

 worked out are enunu-raled brietly: 



1st. Manufacturing Drawings. 



These drawings tell tlu' shop in lUlail wh.il is lo hv rn.idc 

 and what the requirements are. 



2ntl. Manufacturing Ojierations. 



The actual operations recjuired to produce the jKirts and 

 their proper secjuence are decided upon. 



.'ird. I'iie machines on whicli liu' ()|)ir,ilions ari' to \iv perloinK-d .ue 

 determined. 



4tli. The kind of tools, fixtures, gauges, con\e\ing. .md oiIht 

 i(|ui|)nKnt t(i be nsi'd is determined. 



.")ili. .\n i'\p(.-cii(l luiuiiy iiuiput for each oi)i'ration is set up. 



• ith. The grade and r.itc of p.i\- nf liie (i|)er,ilors to be cinpldNcd 

 .ue determined. 



Till. The kind .md .inidunl ot r,i\\ m.iteri.ii nquiri'd per tiiousand 

 |)arts .md ihc lonn in whicii il >h,ill in- |)urcli.isrd .ire 

 determined. 



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