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Object number
W-100
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Classification
Drawing Tool
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Object name
Drafting Instrument
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Title
T-Square
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Creator
Sisson, Jeremiah or Jonathan
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Description
Adjustable T-square. Very handsome instrument. Mahogany long bar is inserted in ivory stock. Maker's inscription on narrow face of stock, with four small flower engravings. Screw holding bar in stock has floral engravings on both sides; one side has holes for turn-key insertion. Bar fits into long slot in stock that allows bar to be swung away from or towards the drafter; angle limit is 25 degrees/155 degrees. The three exposed edges of the bar are bevelled.
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Inscription/Sig.
"I:SISSON. FEC."
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Material
ivory, ebony, Cuban mahogany
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Place Of Prod.
England
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Dimensions
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Imperial(in) |
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Metric(cm) |
| Height |
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1.2 |
| Width |
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68.4 |
| Depth |
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29.5 |
| Diameter |
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| Circumference |
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Frame
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Imperial(in) |
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Metric(cm) |
| Height |
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| Width |
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