Disclosure to Promote the Right To Information

Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public.

इंटरनेट मानक

“!ान $ एक न' भारत का +नम-ण”Satyanarayan Gangaram Pitroda

“Invent a New India Using Knowledge”

“प0रा1 को छोड न' 5 तरफ”Jawaharlal Nehru

“Step Out From the Old to the New”

“जान1 का अ+धकार, जी1 का अ+धकार”Mazdoor Kisan Shakti Sangathan

“The Right to Information, The Right to Live”

“!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता है”Bhartṛhari—Nītiśatakam

“Knowledge is such a treasure which cannot be stolen”

“Invent a New India Using Knowledge”

है”ह”ह

IS 3221 (1966): Sets for Drawing Instruments [PGD 22:Educational Instruments and Equipment]

Ist3!221-1966

Indian Standard

SETS FOR DRAWING INSTRUMENTS

Optica! and Mathematical Instruments Sectional Committee: EDC 36

Chairman

DR C. S. RAO

Members

Rcplrsmtin:

The Andhra Scientific Co Ltd, Masulipatam

SRRI P. V. SUBBA RAO (.I!irmn& to Dr C. S. Rao i

SEBI S. BALA~IJBBAMAX-YA~~ Central %Vater & Power Commission, New Delhi Sam K. S. CHEWY ( Alkmak )

SRRI A. N. BEATTACHARYYA SEBI R. R. CHAKBABOBTY

Ministry.of Defence ( R & D) The Natronal Instruments Limited, Jadavpur

SHBI .J. SASYAL ( Affnnuk) CHIEF HYDROORAPHEB ( NAVY ) Indian Navy

STAFF OFFICEB ( HYDRO ) ( Akmole ) Saxr P. N. DEOBEA~TA Directorate General of Technical Development

( Ministry of Supply, Technical Development & Male&l Planning )

S HBI V. KEISHNAMOOB~Y t Altnnate I SHBI M. W. DESAI Rolea&, Designs & Standards Organisation ( ,Minis-

try of Railways ) DIRECTOI~ ( MAP PUBLICATION )

COL K. L. KEOSLA ( Akwfe) MAJ S. GANWLI SEBI j. L. HUXAB

Survey of India, Dehra Dun

kfinistry of Defence ( DGI ) Central Public Works Department, hfinistry of Works

& Housing SEBI D. MAJUYDAB

SEBI B. R. ,~.IANKHAND DE J. PBASAD

Office of the Development Commisioner; Small Scale Industries, hlinijtry of Industry

The Koh-i-Noor ( India) Private Ltd, Varanasi Central ScientiEc Instruments Orgamsation ( CSIR ),

Chandigarh ) SHRI B. L. SEARMA ( Altcmott

SHBIPBEMPBAILASH S-1 P. C. J AlN ( Afkmok )

National Ph!-sical Laboratory ( CSIR ), New Delhi

DE hl. V. RADHAPBISF~NAIUFLTHY Madras Institute of Trchnology, Madras Smxr E. B. RAJDIX+EAB

SSXBI SUBHASH RAJDE~~AB Raj-Dcr-Kar & Co, Bombay

( Alfcmatr ) Ds I. RAMAXB~SHNA RAO In personal capacity ( 16-3-5 Oflcial Colony, Viz&ha-

pafnam-2 ) REPB~CSENTATIVE Directorate General, Ordnanre Factories ( Ministry

of Defencc )

! Confinued on page 2 )

INDIAN STANDARDS INSTITUTION MANAX BHAVAN, 9 BAIWUR SHAH ZAFAR MARC

NEW DELHI 110002

IS : 3’221- 1966

(‘ontinucdfrom pap 1 )

Rcprtscnting

Quality Marked Goods Manufacturcn’ Co-operatic t Association Ltd. Roorkee

SRRI S. K. GAUTAM ( Aftcmatc ) YHHI H. C. VERMA Associated Instrument Manufacturers ( India )

Private Ltd, New Delhi SHEI D. NIRODY ( Altemak )

4~81 ht. V. PATANKAB, Director General, IS1 ( E.r-o&io Member ) Director ( Mech Engg )

secrets

SHBI S. M. RAZVI

Deputy Director ( Mech Engg ), IS1

Drawing Instruments Subcommittee, EDC 36 : 1

Canucncr

( 01. K. L. KHOSLA Survey of India, Debra Dun

Members

SHRI A. N. BEAF~ACHABYYA Ministry of Defence ( R 8i D j SHRI R. R. CHAKBABOBTY 51~~ S. GAN~ULI

The National Instruments Limited, Jadavpur Ministry of Dcfcnce ( DGI )

SHRI 1.. KRISHNAMOO~~THY Directorate General of Technical Development ( Ministry of Supply, Technical Development 8r Material Planning)

Sum B. R. MANKHAND The Koh-i-Noor ( India ) Private Ltd, Varanasi SHRI PRETTY PRAKASH

SARI P. C. JAIN ( Afttmatr) National Physical Laboratory ( CSIR ), New Delhi

.qHRt D. D. PUBI Central Scientific Instruments Organisation ( CSIR ),

SHRI S. I;. RAJA~OPALAK Chandigarh

SHRI S. N. SINEA Roads Organisation, Ministry of Transport Raja Bahadur Modal Poona Mills Ltd, Poona

SHRI P. K. MUKHERJEE ( Ahmate )

18:3221-1966

Indian Standard

SETS FOR DRAWING

0. FO

INSTRUMENTS

REWORD

0.1 This Indian Standard was adopted by the Indian Standards Institution on 20 August 1966, after the draft finalized by the Optical and Mathemati- cal Instruments Sectional Committee had been approved by the Mechanical Engineering Division Council.

0.2 Drawing instruments are normally sold in boxes consisting of an assortment of compasres, dividers, sprmg bows, inking pens, etc. The number and types of instruments supplied in the sets by different manu- facturers varies considerably. In order to rationalize the required number of instruments and to facilitate comparison, it is necessary to lay down the number of instruments for each set. However, it is not possible to have a cet which could cover all the requirements of elementarv drawing, as well as advanced technical drawings. For this reason, this standard specifics three sets which have been prepared with a view to optimum utility for the user.

0.3 The requirements of various drawing instruments are specified in relevant standards for each item. This standard is one of a series of Indian Standards being prepared for engineers’ drawing instruments. Other standards in the series are:

IS : 3206-1965 Specification for engineers’ drawing instruments, dividers

IS : 3207-1965 Specification for engineers’ drawing instruments, rotating compasses

IS : 3208-1965 Specification for engineers’ drawing instruments, half set of compasses

IS : 3209-l 965 Specification for engineers’ drawing instruments, spring hcnv compasses c

IS : 3210-1965 Specification for engineers’ dra\\-ing instr~ImcJlts,

drawing pen!:

IS : 32 1 l-1 965 Specification for engineers’ drawing instruments, pen points

IS : 3212-1965 Specification for engineers’ drawing instruments, lengthcziing bars

3

lts:32!21-1966

IS : 3213-1965 Specification for engineers’ drawing instruments, handles

IS : 3214- 1965 Specification for engineers’ drawing instruments, pencil points

IS : 32 15-I 965 ‘Specification for engineers’ drawing instruments, needle points

IS : 32 16-j 965 Specification for engineers’ drawing instruments, needles

IS : 32 17- 1965 Specification for engineers’ drawing instruments, prickers

IS : 3219-1966 Specification for engineers’ drawing instruments, boxes for leads and needles

IS : 3220-1966 Specification for engineers’ drawing instruments, screw drivers

IS: 3222 ( Part I )- Specification for instrument screws : Part I Fasteners for drawing instruments ( under preparation )

0.4 In addition to the specified instruments in the general set, beam com- passes, protractors, set squares, transparent scale and parallel ruler may also be supplied in the lower compartment of the box.

I. SCOPE

1 .I This standard specifies the types, sizes and number of drawing instru- ments which comprise a set of drawing instruments of the following types:

a) Drawing Instrument Set - General,

b) Drawing Instrument Set - Engineers’, and

c) Drawing Instrument Set - Utility.

2. DRAWING INSTRUMENT SET-GENERAL

2.1 The ,drawing instrument set- instruments:

general, shall consist of the following

size a) Compasses:

1) 2) 3)

4)

Spring bow pen Spring bow pencil Spring bow reversible, pen-pencil Bow, pen, double knee jointed with sector head joints

77 mm 77 mm 77 mm 77 mm

4

5) Bow, pencil, double knee jointed with sector head joints

6) Half set of compasses, shifting leg, double knee jointed, sector head; with following interchangeable attachments:

Needle point, pen point, pencil point and lengthening bar

7) Rotating compasses with needle, pen point and pencil point

b) Dividms:

1) Spring bow divider

2) Hair spring - sector head, with fine hair spring type adjustment and adjustable needle point

c) Drawing Pens:

1) Drawing pen, fine, with lifting or shift- ing nib

2) Detail pen

3) Dotting pen

4) Rail road pen

IS : 3221- 1966

S&e

77 mm

140 mm

120 mm

77 mm

127 mm

125 mm

125 mm

125 mm

125 mm

d) Box for leads and needles \ only when provision is not already made in the handle of pen or screlv driver >

e) Screw driver -

f) The following instruments may be supplied in the lower compart- ment of the box:

1) Beam compasses 250 mm

2) Protractor, rectangular 150 mm

3) Set square 45’ 150 mm

4) Set square 60’ 200 mm

5) Transparent scale 150 mm

6) Parallel ruler ( link type ) 150 mm

7) Proportional compasses 150 mm

8) Pricker 110 mm

5

ISr3221-1966

3. DRAWING INSTRUW SET--ENGINEERS’

3.1 The drawing instrument set - engineers’ shall consist of the following instruments:

a) Compasses

1) Spring bow pen 2) Spring bow pencil

3) Half set of compasses, shifting leg, double knee jointed, sector head with following interchange- able attachments: Needle points, pen point, pencil point and lengthening bar

77 mm

77 mm

14Omm

4) Rotating compasses with needle pen point and pencil point

b) I%z&fers - spring bow dividers

c) Drawing Pens - drawing pen, fine, with lifting or shifting nib

120 mm

77 mm

125 mm

d) Box for leads and needles (c&y when provision is not already made in the handle of pen or screw driver )

e) Screw driver

4. DRAWING INSTRUMENT SET - UTILITT

4.1 The drawing instrument set-utility shall consist of the fohov&g instruments:

Sip

a) Compasses - Half set of compasses, shifting leg, 122 mm double knee jointed, sector head with following interchangeable attachments: Needle point, pen point, pencil point and leng- thening bar

b) Dividers, sector head 112 mm c) Drawing pen with lifting nib 125 mm d) Box for leads and needles ( only when provision is not already

made m the handle of pen or screw driver > e) Screw driver

6