Assembled Parts

Plate N is an example of a plain, everyday shop drawing, to show the relation of parts and the extreme space occupied by the pump. A great deal of time can be needlessly wasted in producing a drawing of this character, by trying to make too faithful a picture. For example: If all the bolt heads were put in, it is safe to say that several hours' extra time would be required for this one item alone. But the drawing would be no better for shop use. Hence all bolt heads and nuts have been left out, except when necessary to show clearance.

Assembled Parts 600138Assembled Parts 600139

An assembly or general drawing of this character should be laid out strictly from the dimensions shown by the details. It thus serves a valuable purpose in checking up figures, and showing whether or not the parts will go together. The method or character of the work in no respect differs from that suggested for the detail drawings.

If a scale of 3 inches = 1 foot be used, the size of sheet must be 24 inches X 36 inches. The student, however, will perhaps find it easier to use a scale of 1 inches = 1 foot, in which case the ordinary size, 18 inches X 24 inches, will suffice. For such a small scale it will be found undesirable to attempt to put in any very small fillets and corners, although those that can be readily handled by the ordinary bow pen ought not to be omitted. As a matter of fact, the expert draftsman either leaves the corners sharp, as suggested, or puts in the smallest curves freehand.

Order Sheets

Any set of drawings is incomplete unless in connection with it a statement is made in tabular form of the complete make-up of the machine. An infinite variety of ways exists for making the specifications. Sometimes the tabulated data are placed on the general drawing. Most often, however, printed blanks are provided, usually of bond paper, arranged with special reference to the individual shop system and methods of handling work; these blanks are filled in by the draftsman, indexed, and filed as a part of the set of drawings. They can be blue-printed for use in the shops the same as a drawing. From these sheets stock is ordered, checked off, and watched in its process of manufacture.

Order sheets are indispensable in any well-ordered shop. Hence they are illustrated in the pages following the text matter as the final step in the set of pump drawings. They are made as simple as possible, and are not intended to fit any special shop system. As previously stated, the exact form and method of classification can be determined only when the shop conditions are known.

The student, having carefully followed through the preceding pages, must not think that he is master of pump construction, for even the type illustrated has been but touched upon. The object of the detailed discussion is to get the student in close touch with the spirit of construction, to make his drawings real, serious work. It is hoped that the student will work just as though a machine were to be built from his drawings, and built to sell at a profit. Only in this way can advanced work in mechanical drawing be of benefit to him, for after becoming expert in the use of the instruments, no other advance is possible except advance in thought.

Date. American School of Correspondence type.

oct. 10, 1913. inside plunger.

Chicago, ILL.

List Of Castings For 16-8-12 Duplex Pump

No. Wanted.

Name.

Drawing No.

Patt. or Piece No.

Material.

Remarks.

2

Steam Cylinder

B

C.I.

R. & L.

2

Steam Cylinder Head

B

C.I.

2

Steam Chest

D

C.I.

2

Steam-Chest Cover

D

C. I.

2

Slide Valve

D

C. 1.

1

Steam Pipe

D

C.I.

1

Exhaust Tee

D

C.I.

2

Valve Stem Gland

D

C. 1.

2

Piston

C

C.I.

8

Piston Pipe Plug, 1 "

C

C.I.

4

Piston Packing Ring

C

C.I.

2

Spool

C

C. 1.

1

Steam Cylinder Cricket

H

C.I.

2

Steam Cylinder Stuffing Box

H

C.I.

2

Water Cylinder Stuffing Box

H

C.I.

4

Piston-Rod Gland

H

C.I.

1

Valve-Lever Bracket

H

C.I.

2

Yoke

H

C. 1.

R.&L.

1

Short Rocker Arm*

G

C.I.

1

Long Rocker Arm

G

C.I.

2

Valve Stem link

G

C.I.

1

Water Cylinder

J

C.I.

2

Water Cylinder Head

J

C.I.

3

Hand Hole Cover

J

C.I.

1

Water Cylinder Cap

K

C.I.

1

Air Chamber

K

C.I.

1

Discharge 11

K

C.I.

2

Plunger

L

C.I.

2

Plunger Bushing

L

Brass

2

Clamp Ring

L

C.I.

32

Valve Stem

L

Brass

32

Valve Cover

L

Brass

32

Valve Seat

L

Brass

6

Foundation Plate

M

C.I.

DATE. AMERICAN SCHOOL OF CORRESPONDENCE TYPE..

OCT. 10, 1913. INSIDE PLUNGER.

Chicago, ILL.

List Of Steel And Miscellaneous Parts For 16 - 8 - 12 Duplex Pump

No. Wanted.

Name.

Drawing No.

Patt. or Piece No.

Material.

Remarks

2

Valve Steam Head

c

St.

Drop Forging.

2

Piston Rod

c

C. R. S.

2

Valve Stem

c

St.

1

Long P. R. Lever

G

St.

Forging

1

Short P. R. Lever

G

St.

Forging

1

Upper Rocker Shaft

G

St.

1

Lower Rocker Shaft

G

St.

2

Rocker Arm Pin

G

St.

2

Link Pin

G

St.

1

Long P. R. Lever Key

G

St.

Drop Forging

1

Short P. R. Lever Key

G

St.

Drop Forging

2

Rocker Arm Key

G

St.

Drop Forging

32

Valve Spring

L

B8. wire

Spring Temper

32

Valve

L

__

Rubber

Medium

Date. American School of Correspondence type.

OCT. 10 .1913 inside plunger.

Chicago, ILL.

List Of Bolts, Nuts, And Pins For 16 - 8 - 12 Duplex Pump

No. Wanted.

Name.

Drawing No.

Patt. or Piece No.

Material.

Remarks.

24

Cylinder Head Stud 7/8 x 3

B

St.

20

Steam Chest Stud x 8

B

St.

4

Valve Stem Gland Stud 5/8 x 4

D

St.

8

Piston-Rod Gland Stud x 4

H

St.

24

Water Cylinder Head Stud 7/8 x 3

J

St.

12

Clamp Ring Stud x 4

J

Tobin bz

24

Water Cylinder Cap Stud 1 x 3

J

St.

18

Hand Hole Cover Stud 5/8 x 2

J

St.

12

Hand Hole Cover Stud 5/8 x 2

K

St.

8

Exhaust Tee Tap Bolt | x 1)

B

St.

16

Yoke Tap Bolt 3 x 2

B

St.

8

Steam Cyl. Stf. Box Tap Bolt x 1

B

St.

8

Steam Pipe Tap Bolt 5/8 x 1

D

St.

4

Valve-Lever Bracket Tap Bolt 5/8 x 1

D

St.

4

Steam Cyl. Cricket Tap Bolt 1x2

D

St.

16

Yoke Tap Bolt x 2

J

St.

8

Water Cyl. Stf. Box Tap Bolt x 1

J

St.

8

Discharge Ell Tap Bolt x 2

K

St.

4

Air Chamber Tap Bolt x 2

K

St.

2

Hook Bolt (special) 1 x3' - 11"

M

St.

4

Hook Bolt (special) 1 x 3' - 11'

M

St.

1

Eye Bolt Standard 1"

K

St.

34

Standard Nut 5/8

St.

44

Standard Nut

St.

36

Standard Nut 7/8

St.

26

Standard Nut 1

St.

4

Standard Nut 1

St.

4

Standard Nut 2

St.

8

Special Valve Stem Nut 1

St.

Thick

4

Piston-Rod Split Pin x 2

C

St.

2

Spool Taper Pin No. 10 Morse Taper

C

St.

4" long

4

Valve Bracket Dowel Pin x 2

H

St.

Date. american school of correspondence type, oct. 10, 1913. inside plunger.

Chicago, ILL.

List Of Special Fittings, Wrenches, Etc. For 16 - 8 - 11 Duplex Pump

No. Wanted.

Name.

Drawing No.

Patt. or Piece No.

Material.

Remarks.

4

Drip Cock "

B

1

Drip Cock "

D

2

Drip Cock "

H

4

Oil Cup "

H

5

Drip Cock 3/8"

J

1

Relief Valve 1"

B

175 lbs. pressure

Standard Fork Wrench 5/8"

Standard Fork Wrench "

Standard Fork Wrench 7/8"

Standard Fork Wrench 1'

Socket Wrench 3/4"

12" handle

Valve Stem Fork Wrench

Valve Stem Socket Wrench