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The Ultimate Turn-of-the Century Everyday Carry (EDC) Mechanical Masterpiece!
This incredibly rare, (late 1890s/early 1900s) restored piece of American tool history is an antique Hemenway\'s \"Ideal\" Combination Pocket Tool, designed specifically for master machinists, architectural draftsmen and layout engineers who demanded maximum precision in a vest-pocket size.
The Ultimate Discovery - It\'s a Pocket Beam Compass!
While it functions as a highly accurate sliding depth gauge and caliper, the absolute highlight of this tool is hidden right at its base. A sharp steel center-point needle protrudes from the rounded bottom tip. When the hinged arms are extended, this needle anchors into your paper or wood layout board, turning the device into a telescoping drafting trammel/beam compass for swinging geometric arcs!
How the Mechanics Work:
- Telescoping Extension Rule: The nested arms unfold out of the main barrel sleeve to a full 12-inch imperial extension rule.
- Micro-Adjustable grid Casing: The outer barrel features a distinct, crisp numbered grid scale (10, 15, 20, 25, 30) with intersecting fraction ticks. This acts as a micro-adjustment track for setting fine radius tolerances via the spherical slider pin.
- Locking Thumbscrew: The knurled top collar functions as a compression clamp to lock your measurements or angles into fixed position.
