Double Steeple Clock.
Made by Elisha Manross in Bristol, Connecticut circa 1845 / equipped with original fusee device—still functioning as originally intended over 150 years ago. A fusee is a conical shaped pulley having a spiral groove cut into it, with a cable attached. When the mainspring is wound, from having run down, it turns on the fusee through the cable. First on the large diameter of the cone (or fusee), as the mainspring is weak, and during winding the cable will follow down the fusee’s groove to the smaller diameter until the mainspring is fully wound. Now, the strong mainspring is pulling on the small diameter of the fusee where there is less leverage, being so close to fusee’s center. As the mainspring runs during its weekly cycle, it gets naturally weaker but also the cable is turning the fusee and coming out from center on every revolution. The further the cable comes out from center the more leverage it has and subsequently the stronger it pulls. This equalizes the power of the dying mainspring and is quite effective to even out the time during the running cycle of the clock. Without it, timekeeping would be less accurate from the first day after winding to the time to wind again. This clock has double, steeple-on-steeple Gothic design and runs for a week between windings. A very unique and comparatively rare clock.
23½” x 12½” x 4″