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US Patent: 419,467
Curve scriber
Magic pattern rule
Patentee:
Angus McKenzie (exact or similar names) - Cleveland, OH

USPTO Classifications:
33/561.2

Tool Categories:
layout tools : compasses : trammels
layout tools : special purpose gauges

Assignees:
None

Manufacturer:
Lufkin Rule Company - Saginaw, MI

Witnesses:
I. L. Corey
H. T. Fisher

Patent Dates:
Applied: Jun. 08, 1889
Granted: Jan. 14, 1890

Patent Pictures: [ 1 | 2 | 3 ]
Patent drawing
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Description:
Lufkin's Magic Pattern Rule patent. The rule appears in the Mwtca of Luflin's catalog 10. For laying out sheet metal elbow patterns. It came with a linen chart 19 x 23. Catalog 10 lists the rule with chart for $7.50, chart only .75 circa 1920.

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