The number of strokes depends on the distance which the count-wheel has to revolve before being stopped by the detent F.
The angle of the detent planes reduces the friction to almost nil.
When these crystals are warmed, the detent is lifted, and an outflow of light immediately begins.
This is connected with a clockwork and detent arrangement, which simultaneously opens a valve and actuates the lamp flame.
On the gun being fired the sudden forward impetus of the shell causes the detent pin to exert a backward pressure of 8-1/2 lbs.
But the pressure of the escape-wheel against the detent, and the consequent friction, prevent the pendulum from acting freely.
It will be noticed we have made the detent spring E pretty wide and extended it well above the blade of the detent.
Each pin as it passes raises an impulse arm CD which is hooked upon a detent K.
This want undoubtedly led to the invention of the detent escapement.
We will proceed now to consider briefly the advantages the detent escapement has over all others.