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Cog-Wheel Insertion: vintage crochet pattern

A short-repeat insertion worked from a seven-chain ring: a fan of eight double crochet is spread into spaced cogs, then drawn back together over a chain bar, so the band reads as a row of toothed wheels. The book warns that the pattern must be joined exactly.

By the crochetpatterns.io editorial team · Updated · Editorial policy · pattern testing in progress

Cog-Wheel Insertion, book page 16
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Pattern at a glance
DetailValue
Skill levelIntermediate
Yarn weightLace (#0)
YardageNot printed; see modernisation notes. (as printed; yardage not given)
Hook1.5 mm
GaugeNot printed; work a sample and change hook size to suit.
Finished sizeNot printed; worked to the length required.
Timeabout 2 hours

Materials

  • A fine white cotton crochet thread, about size 20 to 40 — ours; this design names no thread at all
  • A fine steel hook to suit the thread
  • Hook: Start with about 1.5 mm (US steel 7) — ours, approximate. The book prints no hook for this design. Change size until the fabric is firm and even.
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Yarn Kit & Substitution Options

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This pattern calls for 350 yards of weight #0 yarn. Select a suggested yarn to see required skeins and estimated cost:

Caron Simply Soft · 100% Acrylic

315 yds per skein · High-yield yardage, silky no-scratch texture

2 skeins required

approx. $$10.98 total

Abbreviations (US terms)

chain
single crochet
double crochet
space
repeat
row

Notes before you start

  • Source: "Cog-Wheel Insertion", The Home Art Crochet Book (edited by Flora Klickmann), The Office of “The Girl's Own Paper & Woman's Magazine”, 4 Bouverie Street E.C., & 65 St. Paul's Churchyard, London; printed by Curtis & Beamish, Ltd., Coventry, England. Public domain in the USA.
  • As printed — materials: No thread or hook is named for this design.. Gauge: Not given.
  • Modernisation note: Stitches are converted by this book's own printed key and its own printed wrap counts, not by stitch name. This is a BRITISH book. The key stands at the head of book page 1 (image p-008.jpg) under the heading “Abbreviations used.” and reads: “ch = chain ; s c = single crochet ; d c = double crochet ; tr = treble ; d tr = double treble ; l tr = long treble ; sp = space ; st = stitch.” The book then glosses its tall stitches with wrap counts in the directions themselves, which fixes the ladder beyond argument: “turn the thread twice around the needle for a long tr” (book page 2) and “3 long tr (thread twice over hook)” (book page 9) make the long treble a 2-wrap, 4-loop stitch — the modern US treble; “3 triple tr into the ring (thread three times over the needle)” (book page 6) makes the triple treble a 3-wrap, 5-loop stitch — the modern US double treble; and “a quadruple tr (thread four times over the needle)” (book page 13) takes 4 wraps. Counting back down that ladder the book's plain tr can only be a 1-wrap, 3-loop stitch, which is the modern US double crochet, and its d c — worked with no wrap — is the modern US single crochet. Its “s c”, the old British single crochet, is the flat joining stitch and is written sl st. So here: d c = sc, tr = dc, long tr and d tr = tr, triple tr = dtr, s c = sl st, miss = sk.
  • Modernisation note: The printed directions run as solid paragraphs, and where the book numbers its rows it does so as “1st Row.”, “2nd Row.” and so on. They are split here into one row or step per line and the ordinals are written Row 1, Row 2, Row 3. Where the book starts a new row with only “Turn with …” and no number, a number is supplied in sequence and the change is noted. Stitch order and counts are unchanged.
  • Modernisation note: The scan of this book carries the usual optical-reading slips and every figure below was read back against the page image: the scan's “lst” and “Ist” are 1st, its “8rd” is 3rd, its “11zh” is 11th, its “de” for a stitch is d c, its “ir” is tr, its “trs” is tr, its “inte” is into, its “imsert” is insert, its “donble” is double, its “crocliet” is crochet, and its “miss3 ch” is miss 3 ch. These are scanning artefacts, not printed errors, and they are corrected silently in the rows; genuine PRINTED slips are a different matter and are always flagged with a “Check:” note instead of being quietly mended.
  • Modernisation note: Hooks are printed only as period British maker's numbers (“No. 6 crochet-hook”, “No. 5 hook”, “a medium fine crochet-hook”) with no diameters, and those numbers do not map onto the modern scale. Any metric size given in the modern materials is ours and is a starting point only.
  • Modernisation note: No gauge, tension or stitch-per-inch figure is printed for this design, or for any design in this book. Work a sample and change hook size to suit the thread.
  • Modernisation note: No yardage is estimated. The book never prints a ball length, a reel length or a quantity for any design — it names a thread and a hook and nothing more — so there is no printed basis for a yardage figure and none is invented here.
  • Modernisation note: No finished measurement is printed for this design. Like every edging and insertion in this book it is worked to the length required, and its depth is set by the stitch counts printed, not by any measurement the book gives.
  • Modernisation note: The design runs across a page turn, from book page 16 to page 17 (images p-023.jpg and p-024.jpg), where its photograph is printed. Both portions print in full and are joined here unchanged.
  • Modernisation note: The book writes “2 doubles” in the last row for what it elsewhere calls double crochet; both are the modern US single crochet and both are written sc.
  • Modernisation note: No thread and no hook are printed for this design. The modern thread and hook given above are ours and are a starting point only.
Smart Pattern Companion

Row progress: 0 of 3 done (0%)

The insertion

0 of 3 done
  1. Ch 7, join in a ring, turn with ch 5, and into the ring make 8 dc, ch 5, 1 dc.
    Mark row complete
  2. * Turn with ch 7 into the space in the previous row, make 2 dc, ch 5, 4 dc, ch 2. Into the top of each of the 8 dc in the previous row make 1 dc with ch 2 between each. Then 4 dc in the next space.
    Mark row complete
  3. Turn with ch 5, make 2 sc into each space made by the 2 ch in the previous row, ch 5, carry this across the 4 dc in the previous row, and in the next space make 8 dc, ch 5, 1 dc. Repeat from *.
    Mark row complete

Working on:

Ch 7, join in a ring, turn with ch 5, and into the ring make 8 dc, ch 5, 1 dc.

Continue this pattern

The rest of the Cog-Wheel Insertion pattern is in the Vintage Crochet Edgings & Trims

Still to come in the full pattern:

  • Finishing

Included with 618 patterns for $9 — $0.01 per pattern.

See what's inside
Cover artwork for the vintage edgings and trims collection: narrow crochet lace strips on folded linen

Errata

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Frequently asked questions

Where is the Cog-Wheel Insertion pattern from?

It was published as "Cog-Wheel Insertion" in The Home Art Crochet Book (edited by Flora Klickmann) by The Office of “The Girl's Own Paper & Woman's Magazine”, 4 Bouverie Street E.C., & 65 St. Paul's Churchyard, London; printed by Curtis & Beamish, Ltd., Coventry, England. The publication is in the public domain in the United States; this version is transcribed and modernised by crochetpatterns.io.

What yarn or thread do I need for the Cog-Wheel Insertion?

Not printed for this design; about size 20 to 40 crochet cotton is a reasonable modern choice. Not printed; see modernisation notes.

What hook should I use?

Start with about 1.5 mm (US steel 7) — ours, approximate. The book prints no hook for this design. Change size until the fabric is firm and even. Gauge: Not printed; work a sample and change hook size to suit.

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