The Harrington knot is a decorative

heraldic knot A heraldic knot (referred to in heraldry as simply a knot) is a knot, unknot, or design incorporating a knot used in European heraldry. While a given knot can be used on more than one family's achievement of arms, the family on whose coat the k ...

, the

badge A badge is a device or accessory, often containing the insignia of an organization, which is presented or displayed to indicate some feat of service, a special accomplishment, a symbol of authority granted by taking an oath (e.g., police and ...

of the Harrington family.''The Art-Journal''; Vol VI; Virtue and Co, 1867; p. 37 It is in essence identical to the fret.

References

{{heraldry-stub Decorative knots Heraldic charges Heraldic knots