Hor-i-zon′tal es-cape′ment.
One in which the impulse is given by the teeth of a horizontal wheel acting on a hollow cylinder on the axis of the balance. It was invented by Graham, about 1700. The diagram shows the action, the cylinder being represented in two positions at different portions of its oscillation. The pallets a b c on the wheel rest alternately on the inside and the outside of the cylinder, their beveled edges sliding against the edges of the cylinder, to communicate an impulse thereto. It is a dead-beat escapement. There is considerable friction. The parts are delicate and hard to repair. The cylinder has been made of a ruby, but at great expense. |
| Horizontal escapement. |
