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इंटरनेट मानक 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. “जान1 का अ+धकार, जी1 का अ+धकार” “प0रा1 को छोड न’ 5 तरफ” Mazdoor Kisan Shakti Sangathan Jawaharlal Nehru “The Right to Information, The Right to Live” “Step Out From the Old to the New” IS 15084 (2002): Spring balance - Tension type (for use in schools) [PGD 22: Educational Instruments and Equipment] “!ान $ एक न’ भारत का +नम-ण” Satyanarayan Gangaram Pitroda ““IInnvveenntt aa NNeeww IInnddiiaa UUssiinngg KKnnoowwlleeddggee”” “!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता हहहहै””ै” Bhartṛhari—Nītiśatakam “Knowledge is such a treasure which cannot be stolen” ,& IS 15084:2002 a—?la-m-m-Rm ?TdJ-r4Rl-q)-fafm Indian Standard SPRING BALANCE — TENSION TYPE (FOR USE IN SCHOOLS) — SPECIFICATION ICS 03.180;17.100 @BIS2002 BUREAU OF INDIAN STANDARDS MANAK BHAVAN, 9BAHADUR SHAH ZAFAR MARG NEW DEL HI 110002 May 2002 Price Group 2 Educational Instruments and Equipment Sectional Committee, BP 22 FOREWORD This Indian Standard was adopted by the Bureau of Indian Standards, after the draft finalized by the Educational Instruments and Equipment Sectional Committee had been approved by the Basic and Production Engineering Division Council. The spring balance is used in schools especially in Physics Laboratories in carrying out various experiments involving weighing or force measurement. There are various types of spring balances that istop pan, tension and compression type, etc. This standard covers tension type (open) spring balance only. For the purpose of deciding whether aparticular requirement of this standard is complied with, the final value, observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordance with IS 2:1960 ‘Rules for rounding off numerical values (revise~’. The number of significant places retained inthe rounded off value should be the same as that of the specified value in this standard. $< IS 15084:2002 Indian Standard SPRING BALANCE — TENSION TYPE (FOR USE IN SCHOOLS) — SPECIFICATION 1 SCOPE 4.2 Spring Assembly This standard covers the requirements for spring A closed coil spring with provision for attaching it balance 250 g capacity for use in school laboratories. with body at the upper end and with hook at its other This standard specifies the definitions, terminology, end. general requirements, material and dimensions, etc. 4.2.1 Rod with Hook 2 REFERENCES Mild steel rod with hook attached tospring atthe lower end to facilitate suspension of mass. The following standards contain provisions which through reference in this text, constitute provisions 4.2.2 Triangular Pieces ofthis standard. Atthe time ofpublication, the editions These pieces attached to upper and lower portions of indicated were valid. All standards are subject to the spring hold the threaded hook with nuts at the revision; and parties to agreements based on this lower end and a screw with nut at the upper end. standard are encouraged to investigate the possibility 4.3 Pointer of applying the most recent editions of the standards indicated below: A plastic piece through which the wire with hook [sNo. Title passess (friction grip) to indicate reading directly on 126(9Part 1): 1997 Legal metrology — Material the graduation on the body. measure of length: Part 1Woven 5 MATERIAL metallic and glass fibre tape The material used for various part shall be as under: measures (second revision) Name of the Part Material 1367(PaItll):1996 Fasteners — Threaded steel fasteners — Technical supply a)Body Acrylonitrile — Butadiene — Styrene (ABS) (white) ----- conditions: Part 11 Electroplating b)Spring assembly coatings i) Spring Spring steel wire, C-75 Grade 2, 4454 (Part 1): 1981 Steel wires for cold formed 00.71 mm [seeIS4454 (Part 1)] springs: P a rt lPatented and cold ii)Rod with hook Mild steel rod, 02 mm drawn steel wires-unalloyed iii)Triangular pieces Mild steel, 0 0.5 mm thick (second revision) c)Pointer Acrylonitrile — Butadiene — Styrene (ABS) (Red) 3 DEFINITION d)Nuts & Screws Mild steel and shall be 3.1 For the purpose of this standard a spring balance electroplated shall mean an instrument which on the application of [see IS 1367(Part 11)] force on itshook, indicate the reading (by extension or 6 GENERAL REQUIREMENTS elongation ofaclosed coil spring) bymeans ofapointer 6.1 The spring balance ofthis type shall be suspended on the scale. from support. 3.2 The general arrangement for this type of spring 6.2 The body shall be white only. balance isillustrated inFig. 1. 6.3 Graduation (minimum 10g)and numbers engraved 4 TERMINOLOGY shall be filled inblack paint. For the purpose of this standard the following 6.3.1 The thickness of the graduation lines shall not ternlinology/definition shall apply (see also Fig. 1). exceed 0.5mm [seeIS 1269(Part l)]. 4.1 Body 6.4 The dimensions of various components of spring balance shall be as given inFig. 2. The main body, duly graduated in gram which has housing forspring with itsfree movement up and down. 6.5 The maximum thickness of body shall be 3mm. 1 —. IS 15084:2002 6.6 The body shall have facility for suspension and b) The word ‘For use inschools only’ inbold letters; ~ for housing spring assembly. and c) The nominal capacity in gram. 6.7 The spring shall betempered and plated. The ,, finished spring shall haveaspring constant of50/26 7.2 BIS Certification Marking @m. ,, The product may also be marked with the Standard ! 4,, ., 6.8 The spring shall be so assembled that it moves Mark. freely ingroove. 7.2.1 The use of the Standard Mark is governed by the provisions ofBureau ofIndian Standards Act 1986, 6.9 The pointer shall have provision for adjustment to and the Rules and Regulations made thereunder. The zero position on scale when fitted on the wire with details of conditions under which the licence for the hook. use of the Standard Mark may be granted to 7 MARKING AND PACKING manufacturers or producers maybe obtained from the Bureau of Indian Standards. 7.1 The following marking shall be marked either by engraving or any other suitable means on the spring 7.3 Packing balance: The spring balance shall be packed suitably to avoid a) Manufacturer’s name ortrade-mar~if any; any damage. BODY SPRING NUT POINTER ROD W NOOK 7f -. L SCREW AND TRIANGUIM PIECES NUT “L FIG. 1 SPRINGBALANCE— GENERALARRANGEMENTANDTERMINOLOGY IS 15084:2002 10 .————.————————— i- *1 IE 1 ——— ——. —— ——. ——— — t 3 mm #2-o.2 i60°!!c’s s 60° —f 19 8 10 19 +1+ q., NUT _.@32 SCREWAND NUT TRIANGULARPleCE 30 E CLOSEOCOIL 7ENSIONSPRING 02 010 ....s. POINTER 175 I RODWllN NOOK All dimensions in millimetres, FIG.2 DIMENSIONSOFVARIOUSCOMPONENTSOFSPRINGBALANCE 3 Bureau of Indian Standards 131S is a statutory institution established under the Bureau oflndian Standards Act, 1986 to promote harmonious development of the activities of standardization, marking and quality certification of goods and Zttending to connected matters in the country. (@yright B1S has the copyright of all its publications. No part of these publications may be reproduced in any form without the prior permission in writing of BIS. This does not preclude the free use, in the course of implementing the standard, of necessary details, such as symbols and sizes, type or grade designations. Enquiries relating to copyright be addressed to the Director (Publications), BIS. Review of Indian Standards Amendments are issued to standards as the need arises on the basis of comments. Standards are also reviewed periodically; a standard along with amendments is reaffirmed when such review indicates that no changes are needed; if the review indicates that changes are needed, it is taken up for revision. Users of Indian Standards should ascertain that they are in possession of the latest amendments or edition by referring to the latest issue of ‘BIS Catalogue’ and ‘Standards: Monthly Additions’. This Indian Standard has been developed from Doc : No. BP 22 ( 0067 ). Amendments Issued Since Publication Amend No. Date of Issue Text Affected BUREAU OF INDIAN STANDARDS Headquarters: Mwl~k Bhavan, 9 Bahadur Shah Z afar Marg, New Delhi 110002 Telegrams : Manalisanstha Telephones :3230131, 3233375,3239402 (Common to all offices) Regional Offices : Telephone Centrul : Manak Bhavan, 9 Bahadur Shah Zafar Marg 3237617 NEW DELHI 110002 3233841 { Eastern : 1/14 C.I.T. Scheme VII M, V. I. P. Road, Kankurgachi 3378499,3378561 KOLKATA 700054 3378626,3379120 { Northern : SCO 335-336, Sector 34-A, CHANDIGARH 160022 603843 602025 { Southern : C. L T. Campus, IV Cross Road, CHENNAI 600113 2541216,2541442 2542519,2541315 { Wcslern : Manakalaya, E9 MIDC, Marol, Andheri (East) 8329295,8327858 MUMBAI 400093 8327891,8327892 { Branches : AH MEDABAD. BANGALORE. BHOPAL. BHUBANESHWAR. COIMBATORE. FARIDABAD. GHAZIABAD. GUWAHATI. HYDERABAD. JAIPUR. KANPUR. LUCKNOW. NAGPUR. NALAGARH. PATNA, PUNE. RAJKOT, THIRUVANANTHAPUR AM. PrintedatPrabhatOffsetPress,NewDelhi-2