Fixed Triangular Head T Square

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“To enable the drawing of long parallel, the head must have been a long contact surface with the edge of the board. It must also be wide enough to hold the blade stiffly.” —Grimshaw, 1902

Source

Grimshaw, Robert Modern Workshop Hints (Philadelphia, PA: Sampson Low Marston & Company LTD, 1902)

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1902×2400, 262.7 KiB

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811×1024, 30.4 KiB

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507×640, 16.2 KiB

Small GIF

253×320, 6.8 KiB