Coil Holder Type "A"

Precision geared coil holder with an 8 to 1 ratio and 4½‑inch operating handle.

• Reduction gearing gives smooth, controlled movement of the coil block.
• Patent locking device prevents the block from dropping under heavy coil load.
• Contact plugs comprise four sections for secure electrical connection in all coil sockets.
• Mounting options: panel or baseboard via four screws through side supports.
• Supplied with ebonite bars for top‑mount fixing and a drilling template for accurate installation.

Performance
Praised for its mechanical quality and ease of operation. The review notes the action as “smooth and easy,” with commendable engineering and attention to constructor needs.

Materials
Ebonite bars, metal gearing and handle, wood or metal mounting base.

Price (1926)
6 shillings, considered “very reasonable for a first‑class geared coil holder.”

In questo link sono elencati 4 modelli, di cui 4 con immagini e 0 con schemi.
Elenco delle radio e altri apparecchi della Penton Engineering Co.; London