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Thermal Socks

by Linda

Thermal Socks, eh? They must be really thick and warm, right? Well, they are cozy, but that's not where the name came from.

The stitch pattern used for the body of the sock is adapted from the stitch used in manufacturing the fabric for thermal underwear! Years ago someone from one of the knitting lists hauled out her magnifying glass and knitting needles to see how this worked and posted her results to the list. I don't have your name anymore My Dear, but much thanks!

Since that time in 1995, I've wanted to use Thermal Stitch in something or other, so finally, I give you Thermal Socks. Well, actually, I gave them to my Mom... :)

[Thermal Socks - Click for Larger Image]

  1. Cast on 36 sts, arrange stitches 12/12/12.
  2. Work 18 rounds of k1 p1 ribbing.
  3. Work one round plain knitting, evenly increasing number of stitches to 44. Rearrange sts to 16/12/16.
  4. Thermal Stitch in the Round is a four stitch, four row pattern repeat, see chart below:
    k p p k 
    k p p k 
    p p k k 
    p p k k    <-- begin here, work right to left
    
  5. Work thermal stitch for 8 repeats (or more for a longer sock). Rearrange sts 12/20/12 in preparation to work heel flap.
  6. Heel Flap - *Slip1, k1*, repeat across 12 sts, turn.
  7. Slip first st, purl across remaining 11 sts, purl across another 12 sts. Leave remaining sts from round on spare ndl or st holder to be worked later.
  8. *Slip 1, knit 1*, repeat across the 24 sts.
  9. Slip first st, purl across the other 23 sts.
  10. Repeat these two rows 22 times altogether, end right side facing.
  11. Work 15 sts in pattern established for heel flap, k2tog, k1, turn (leaves 6 sts unworked at end of ndl).
  12. Slip first st, purl 7 sts, p2tog, p1, turn.
  13. Slip first st, work 8 sts in pattern, k2tog, k1, turn.
  14. Slip first st, purl 9 sts, p2tog, p1, turn.
  15. Slip first st, work 10 sts in pattern, k2tog, k1, turn.
  16. Slip first st, purl 11 sts, p2tog, p1, turn.
  17. Slip first st, work 12 sts in pattern, k2tog, k1, turn.
  18. Slip first st, purl 13 sts, p2tog, p1, turn. You should now have reduced those 24 sts down to 16 sts in total.
  19. K2tog, work next 12 sts in pattern established, k2tog (14 sts).
  20. Onto same ndl, pick up and knit 13 sts along side of heel flap, pick up a st in space between ndl 1 and ndl 2. On ndl 2, work first row of thermal st on the 20 instep sts (which were set aside earlier). On ndl 3, pick up a st in the space between ndl 2 and ndl 3, pick up 13 sts along other side of heel flap. Also onto ndl 3, knit the first 7 sts from ndl 1. Sts now number 21/20/21.
  21. Work one round even (without decreasing), working row 2 of Thermal St on the 20 sts on ndl 2, and knitting plain stocking st on ndls 1 and 3.
  22. Knit to within last 3 sts on first needle, knit 2 tog, k1. Work thermal st across 2nd ndl. On 3rd ndl, k1, k2tog tbl (or ssk), knit to end of needle. Stitches will number 20/20/20.
  23. Work one round even as above.
  24. Continue working these two rounds til sts number 11/20/11.
  25. Work without any further decreases til you're about 40 rows from the edge of the heel flap, ending with a round where the instep sts begin with k1, p1, p1, k1. This should be about 6 or 6 1/2 inches from the edge of the heel flap.
  26. Toe Decrease - The toe area is worked in the same st used on the heel (s1, k1 across). Decreases are worked on the plain knitted rounds.
  27. Knit to within last 3 sts on first needle, knit 2 tog, k1. Knit across 2nd ndl. 3rd ndl, k1, k2tog, knit to end of ndl. Stitches will number 10/20/10.
  28. Work one round even, but in heel st, beginning with slip 1.
  29. Knit to within last 3 sts on first needle, knit 2 tog, k1. On 2nd ndl, K1, k2tog tbl (or ssk), knit to within last 3 sts on first needle, knit 2 tog, k1. 3rd ndl, k1, k2tog, knit to end of ndl. Stitches will number 9/18/9.
  30. Work one round even (without decreasing), beginning with the appropriate st (slip or knit) which will line up the main part of the toe with the slipped and knitted sts from 2 rows below.
  31. Repeat these last two rounds til sts number 5/10/5, but do not work an even round after your last decrease round. Knit the 5 sts from ndl 1 onto ndl 3, graft toe closed.
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