The Whorl fingerprints Patterns
Table of Contents:
Definition: A whorl fingerprints is that type of pattern in which at least two deltas are present with a recurve in front of each (Figures 3.56 through 3.103).
Types: The plain whorl, the central pocket loop whorl, the double loop whorl, and the accidental whorl.
Plain Whorl fingerprint
A plain whorl possesses two deltas and at least one ridge making a complete circuit, which may be spiral, oval, circular, or any variant of a circle (Figures 3.77 through 3.85).
Figure 3.77-3.85 Plain whorl fingerprint patterns.
Central Pocket Loop Whorl fingerprint
Definition: The central pocket loop has two deltas and at least one ridge making a complete circuit, which may be spiral, oval, circular, or any variant of a circle (Figures 3.86 through 3.103).
Figure 3.86-3.94 Central pocket loop whorl fingerprint patterns.
Figure 3.95-3.103 Central pocket loop whorl fingerprint patterns.
Combines the features of both loops and whorls.
a. An imaginary line between the inner and outer delta must not touch or cross any of the recurving ridges within the inner pattern area (Figure 3.124).
b. In lieu of a recurve in front of the delta in the inner pattern area, an obstruction at right angles to the line of flow will suffice.
c. The obstruction may be curved or straight, connected or unattached to the recurve.
d. A dot cannot be considered an obstruction.
e. The inner line of flow is determined by drawing an imaginary line between the inner delta and the center of the innermost recurve or looping ridge (Figure 3.125).
f. A true recurving ridge does not have to cross the line of flow at right angles; an obstruction does.
g. If the recurve or obstruction has an appendage at the point of intersection of the line of flow, at the delta side, it is spoiled.
In a central pocket loop whorl, at least one recurve or obstruction at right angles to, free from appendage, must cross the inner line of flow (Figure 3.126).
Double Loop Whorl fingerprint
A double loop whorl is a fingerprint pattern that consists of two separate loop formations with two separate and distinct sets of shoulders and two deltas (2 x 2x2) (Figures 3.105 through 3.113).
Figure 3.105-3.113 Double loop whorl fingerprint patterns.
Accidental Whorl fingerprint
An accidental whorl is a pattern consisting of a combination of two different types of patterns, with the exception of the plain arch, with two or more deltas, or a pattern that possesses some of the requirements for two or more different types, or a pattern that conforms to none of the definitions (Figures 3.114 through 3.122).
Figure 3.114-3.122 Accidental whorl fingerprint patterns.
Examples are as follows:
If there is an issue between two types of patterns in the whorl fingerprints pattern or ridges that conform to more than one subdivision, the order of priority in preference is: