Dear Steve,
Welcome to the PuttingZone! Nice question.
The key to understanding Bobby Locke's stroke is the line he draws the putter back along (the verb tense here is the "eternal present," suitable for the immortals of golf). He sets up with the putter aimed square down the line at the target with a narrow stance but with his right foot drawn back from the line about 3 inches. His feet are still aimed perpendicularly into the putt line, though. This slightly "closes" his hips to the line of the putt, but he keeps his shoulders square. He then draws the putter back along the line of his toes (and hips). The "hooding" is the keeping of the putter face aim unaltered during the backstroke by a counterclockwise rotation of the wrists as the backstroke progresses.
Locke's narrow, closed stance with feet straight at the line.
Once he reaches the top of the backstroke, he fixes the wrists and then redelivers the putter along the line of the feet into the ball on a slight inside-to-out path (perhaps something like the 6:30 to 12:30 line on a clockface centered at the ball). However, right at the bottom of his stroke just before contact with the ball, Locke starts the putter head upward into impact and extends the putter head straight down the line. This whole forward-stroke action is basically a movement of the right shoulder out towards the line and forward until the bottom of the stroke in the middle of the stance, at which point the shoulders have rotated counterclockwise above the closed stance (feet and hips) to re-square to the line of the putt, and then a transition to a movement of the lead shoulder upward to cast the putter head straight down the line right at the critical section during impact.
In the above animation, the face-on view makes it difficult to see the shoulder action. It wold be nice to have a view from above Locke's head, showing the outward action of the right shoulder to where the shoulders square to the line. As it is, you can still see this action by carefully watching his cap, which rotates right-side forward with the shoulders.
This photo above shows how in the forward stroke Locke's shoulders return to square and the putter face is also square to the line of the putt (as it was when it started). Note that the putter face line from heel to toe is the same as the alignment of his left foot. So, square the left foot up to the line, draw the right foot back 3 inches or so to close the stance while leaving the shoulders square, draw the putter back along the toe line while keeping the face aimed as it is at the start, freeze the wrists at the top of the backstroke, move the right shoulder to redeliver the putter back down the toe line and to re-square the shoulders, and transition to an up-stroke once the shoulders re-square.
By setting up with shoulders closed to the line, Locke makes it very hard (practically impossible) to pull the putter across the ball to the inside, so his only real problem is avoiding a push. This he accomplishes by the consistency of shoulders-arms coordination so that a) the sweetspot of the square putter stays on the line of the toes (doesn't come inside the line or run across the line to the outside), and b) he always transitions right smack at the bottom of the stroke before impact.
The stroke is just fine on today's greens, if you can stay relaxed enough. Locke learned his craft on some near-perfect greens in South Africa, and he always remarked that a master putter could not really reach the highest levels of his craft unless he worked on extremely fine greens. but then ocke was notoriously unperturbable, and was always as calm as a daisy in summer on the golf course. There is probably something about Locke's body and his personality that suits him better than most to his particular technique, so if it doesn't work for you as well as it did for Locke, you probably shouldn't fault the technique per se.
I hope this helps.
Cheers!
Geoff Mangum
Putting Theorist and Instructor
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