Description
Rare Automatic Adjustable Spanner – Self-Adjusting Wrench
Ingenious self-adjusting spanner design | An unusual mechanic’s wrench that automatically adapts to different fastener sizes
This vintage automatic adjustable spanner is an interesting and uncommon example of the inventive wrench designs that appeared throughout the late nineteenth and early twentieth centuries. Unlike a conventional adjustable spanner with a thumbwheel adjustment, this tool features a self-adjusting sliding jaw mechanism intended to accommodate a range of nut and bolt sizes without the need for constant manual adjustment. Just slide the collar up against the nut and the jaws are locked. Easily unlock the mechanism by sliding the collar down again.
The forged and machined construction gives the tool a substantial feel in the hand, while the enclosed sliding jaw arrangement demonstrates the clever engineering that made automatic spanners popular with mechanics, engineers and tradesmen seeking a faster alternative to traditional adjustable wrenches.
Although the previous owner nicely engraved their name in the handle, this tool is offered as an unidentified or unattributed automatic adjustable spanner. Collectors of patented and unusual spanners will appreciate the distinctive mechanism and the industrial appearance of this example.
Key Features:
- Forged and machined steel construction.
- This 7″ spanner accommodates nuts from about 1/4″ (6mm) to 3/4″ (19mm).
- Unusual and collectible wrench design.
- Suitable for collectors of patented and specialty spanners.
- Interesting display piece for mechanic, engineering and tool collections.
- Practical workshop tool with strong industrial character.
Condition
Good vintage condition with honest wear consistent with workshop use and age. The tool retains a pleasing dark steel patina together with minor surface marks, oxidation and handling wear. The self-adjusting mechanism appears complete. No major damage or repairs are evident from the photographs provided apart from the engraving. As with all vintage adjustable spanners, buyers should examine the photographs carefully to assess condition and functionality for use.