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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””
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,&
IS 15084:2002
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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
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(@yright
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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
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