Bok Vocational Technical School - Craftsman Yearbook (Philadelphia, PA)

Page 80 text:

Draftrng and machrne deslgn IS a trade winch occupres a promment place rn the metal trades 1ndustr1es Pract1cally all machmes or mechan1cal devrces are constructed accordmg to specrflcatlons or d1rect1ons g1ven on a blueprmt or a drawmg which tells exactly what the d1mens1ons and the shapes of the castmgs or parts are to be After the Oflglnal plan or design has been prepared by the deslgner It IS the work of the draftsman to make detarled drawmgs of every part of the proposed machme or devlce From these draw1ngs are made traclngs and finally blueprlnts Wl'llCh are used to guide workmen m the maklng and assemblmg of mechan1cal parts All these jobs center 1D the dravvrng room or engmeermg department of an mdustr1al plant The draftrng and mach1ne deslgn course covers the work usually done by the mechan1cal draftsman m tracmg draw1ngs deta1l1n0 dravvmgs maklng layouts and desrgmng mechan1cal parts Durmg the first year the student learns the use of drawmg rnstruments and the basrc techmques rn makmg mechanlcal drawmgs he p act1ces free hand lettermg drmensronmg sketchlng tracmg and detarlmg The second year brrngs the student 1nto sheet metal developments and scale dravvmgs 1nvolv1ng tolerances screw threads keys and p1ns In the thrrd year the course consrders problems 1n gears belts and pulleys chams and sprockets bearrngs cams mechamsms veloc1ty dlagrams est1mat1onofwe1ghts and strength of mater1als Instructlon m blueprzntmg heat treatrng machme shop work and electr1c1ty IS also glven echanlcal Drafting When we mean to bmld Well first survey the plot then draw He apprehends a world 0 gures here the model IVP It IS GS 60.851 LIS to CO1J.?'lf CIIOTYHCS ASY L m matter and orrn ollowmg sw OS ' 9 2 5 1 9 ' , c Q T ' a 9 a 9 ' . . Q . . . Y s 9 a ' 3 s J a a 9 N a s 9 ' rs 9 3 ' O O l I I C O C , f fi ' KING HENRY Arr Il ' ' ' ' Kms Hnmw IV, Pau II ouxxnh' 'f f l Love s Lzmous. s L 'r , ' l M' , rf ' . l f' - 3 A x . Y 7 X 4 ' ll -- . V . V px: .

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I saw a smith stand with his ham' mer thus . . . Heat me those irons hot . . . Give me the iron, I say . . . Kms Ions Give me that mattoclq and the wrenching iron. Romeo AND JULIE1- What! Know you not, Being mechanical, you ought not walk Upon a laboring day without the sign Of your profession? JULIUS CA msn. I shall the eject of this good lesson keep . . . HAMLH . . . achine Construction . . . There are few of our modern conveniences that do not reflect the skillful workmanship of machinists. Machinists help to make and assemble refrigerators, automobiles, airplanes, typewriters, and other machines and their parts. They are the men who take the rough castings made in the foundry and do the necessary fine work and machining to prepare them for the final assembly in the completed machine. To do this important work, these craftsmen must be skillful in the operation of various machine tools, such as lathes, shapers, grinders, and milling machines. Their work calls for a high degree of hand skill in' finishing and assembling parts. The program of the machine shop practice course enables the student to acquire the basic skills and knowledge essential to a wellftrained, allfaround machinist. The school shops are equipped with the kinds of machines used in industry. From the beginning, the student operates these machines in the making of practical and useful metal objects. His training involves work on the bench, lathes, shapers, milling machines, grinders, and drills. lt also includes precision work on hne machine tools, practice in exacting hand work, and the study of metals, their composition, strength, methods of machining and heat treatment. Since the machinist must carry out the idea of the designer exactly, blue print reading, layout of machine parts, and the making of mathematical calculations becomes a necessary part of the student's training. The making of tools and dies features the advanced work in the course.

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Optical Mechanics is the trade of the tech' nician engaged in the production of optical instruments and appliances for the aid, cor' rection, or protection of human vision. The optical technician is skilled in the neutralizing, centering, and laying off of lenses, surface grinding, edge grinding, frame bending and trusing, inserting and mounting lenses into supporting materials, and soldering. He makes glasses and spectacles according to prescription. Students of the optical mechanics course are trained in all of the above branches of the trade. Training includes practical instrucf tion in hand bench work, neutralizing of lenses and acquiring knowledge of the differ' ent forms and of the theory of lenses. Although the emphasis in the course is on the manufacture and adjustment of glasses and spectacles, students also receive experif ence in the repair and adjustment of various other optical instruments, such as micro' scopes, cameras, and fine precision instru' ments used by oculists and optical technicians. Let me give light . . . Ti-in Menon-mN'r or Vexice I can see yet without spectacles. MUCH Ano ABOUT NOTHING Let me see thine eyes, wink nowg now open themg In my opinion yet thou seest not well. KING Harem VI, Pain II Optical echanics