This is an impulse motor that I removed from an old (nineteen-fifties) GPO telephone exchange clock, (I installed a modern movement in the clock). The impulse motor is a beautifully intricate but simple device that operated the clock using electrical impulses generated by the telephone exchange.
Arduino DCF77 Pulse Clock : 13 Steps (with Pictures) - Instructables
PUL-SYN-ETIC Royal Museums Greenwich
Performance Analysis
Antique Electric Clocks
Electric Clocks - Synchronous motor electric and impulse driven Slave clocks by Smith's Ferranti Temco Synclock Gents Westerstrand National Electric
Impulse 150 RPM DC Gear Motor at Rs 1300, DC Gear Motor in Surat
Clock - Wikipedia
The Gents' 'Pulsynetic' Waiting Train Electric Turret Clock Movement.: A clean, early example of the Gent's Pulsynetic C40A WT for sale.
IMPULSE MOVEMENT - MEDIUM SHAFT - 1/2 MIN
The Gents' 'Pulsynetic' Waiting Train Electric Turret Clock Movement.: Gents Pulsynetic Bell Striker C54 description of actions.
Master Clock driver for antique slave clocks