IS 13972 : 1994 Household sewing machines - Bobbin winder assembly - Specification

1 Scope

1.1 This standard specifies the requirements for bobbin winderassembly for sewing machines for household purposes.

1.2 It deals with bobbin winder assembly to be actuated bycontact diameter of flywheel.

2 References

IS 101 : Part 3 : Sec 4 :1987 Method of sampling and test forpaints, varnishes and related products:Part 3 Test on paint film formation, Section 4 Finish

IS 101 : Part 5 : Sec 1 :1988 Method of sampling and test forpaints,varnishes and related products:Part 5 Mechanical test for paint film, Section 1 Hardness test

IS 210:1978Grey iron castings

IS 1068:1993Electroplated coating nickel pluschromium and copper plus nickel pluschromium

IS 1570 : Part 2 : Sec 1 : 1979 Schedule for wroughtsteels:Part 2 Carbon steel (unalloyed steel), Section 1 Wrought: products (other thanwire) with specified chemicalcomposition and related properties

IS 2500 : Part 1 :1992Sampling inspection procedure:Part 1 Attributes sampling plans indexedby acceptante quality level (AQL) forlot by lot inspection

IS 4905 :1968 Methods for randomsampling