- Jun 2014
Hovering over your personal insults , wich shows much of your personal hate and quality of answers.I repeat what I asked of you before:
1) the definition of an escapement and the source of where I got the definition (Merriam Webster dictionary at the bottom of the post)
2) an explanation of how the chinese [Greek] escapement works
3) an explanation of why point #2 falls within the definition of escapement as described in point #1
I hope people can prove they know how the mechanism works by explaining both the mechanism and why it pertains to their definition of escapement (and seriously, if you need more than 30 seconds to find the 'right' definition, then chances are it's not the same definition that everybody else is using). This reveals much more of your knowledge and neutrality as opposed to tossing out cheap words with no explanation whatsoever.
You did not do points 1, 2, or 3. I on the other hand did do points 1, 2, or 3. Please try to match that.
According to Merriam-Webster dictionary you are grasping to :
1 according to this definition only the medieval one is featuring an escapement. Not the Chineese even falls into this definition.a device in a timepiece which controls the motion of the train of wheelwork and through which the energy of the power source is delivered to the pendulum or balance by means of impulses that permit a tooth to escape from a pallet at regular intervals
But , beeing generous and removing the reference to the Pendolum or balance then you get the definition to be applicable both to the washstand mechanism, and to any device that allows discrete fragmentation of the mechanical energy into impulses. This fits perfectly to the Philon mechanism and he also states that the washstand construction is similar to that of clocks as a well as the vitruvius description of how some alarm clocks worked.
2 in particular to the greek mechanism how it works had been already described to you several times, but you keep requesting over and over the description, for nonsense. but again here it is.
Philon of Byzantium 31 PneumaticaIt is a washbasin whose construction resembles that of clocks. An arch is made, into which a door opens, whence a hand holding a ball comes out, and in the ball are pumice stones. One takes the pumice stones and sets the ball aside; The hand returns and the door is pushed back. Then the water comes out of the beak of a bird, and the hands are washed. There is enough water to rinse your hands and mouth. The flow ceases; Then the door reopens, and the hand comes out, holding another ball. We take what's inside and put it aside. The hand returns; The water still springs from the beak of the bird, and it is repeated till everybody has washed their hands. Then we close the tap; The water stops flowing, and all the action of the apparatus stops too.You take a box of the size you want, and you divide it into two halves. In the lower half, you place an axle on two trunnions with a spoon at one end and at the other end a counterweight that raises the spoon when it is empty. When it is a little full, it descends and its water flows into a vase of any shape placed at the bottom of the chest. In the upper half of the box, you have a very solid lead tank, built with the utmost care, so that the water does not leak. This reservoir is at the rear of the body and is provided with a pipe in the middle plane of the body, through which the water flows to pour into the middle of the spoon when it is empty. The width of this tank is one quarter of that of the body, and its length approaches the width of the body. Let us place on the front of this tank, in the free space which remains in front of the pipe, another axis on two fixed trunnions. At the extremities of this axis which is directed towards the exterior of the body is a hand stretched, and at the other end a lead counterweight. The hand is raised up when there is nothing in it. Its weight is such that, when the ball is added with what it contains, the hand leans; It will press a door with two leaves that opens, and the hand appears outside. When we take the ball of the hand, it comes back and returns. She then pulls the two wires attached to the two wings, and the two wings are closed. The axis is marked θ, the hand ι, the counterweight κ, the two wires λ, the two wings μ.Above the hand, a fairly inclined channel for the balls is placed under the roof of the box and descending towards the hand. The balls are placed there; At its extremity is a key which opens naturally, being heavy from below.To this key is attached a thread which passes over a small pulley, and the other extremity of which is fixed to the lower extremity of the axis, to the counterweight of the spoon. The key is marked ς and the pulley ρ. For the thread, it is written on it.When the counterweight of the spoon tilts down, it pulls the thread on the pulley, and the key closes. When the spoon is full and the thread is released, the key opens; Then the ball moves and comes to rest in the hand. This one bends, the doors open, and the hand comes out. There is a place near the water reservoir from which water is poured into the reservoir; This is outside the box. There is a funnel, equipped with a tap which is opened and from which the water pours into the reservoir that it fills up to the level of the funnel. Then the tap is left open. The water will drain in the spoon as long as the tap is open.We make this device as we said. The vase into which the spoon pours is similar to a spoon or similar to a basin; It is inside the box. At the bottom of this receptacle is a hole through which the water enters to exit in a long pipe going to the end of the box. The hose bends so that it flows to a suitable drainage location so that the water stays there for a long time. Under the hole of this bowl is another tank. The water enters first with the velocity of the cuvette hole in this tank, then comes out of the tank through a narrow pipe leading to the bent pipe. The cuvette is marked υ, the bottom tank φ the pipe ς '. In the upper part of the bowl is placed a kind of bulb, which receives a little water, which is first discharged by a conduit to the discharge orifice, to water the pumice stones, and to allow the rubbing of the Hands before the water arrives in abundance. The place from which the water flows on the hand is ο. Understand what we have described. When you want the appliance to stop working, close the funnel valve, and the water will no longer drain. That's what we wanted to explain.
To be more specific application to alarm and mechanical clockworks from Vitruvius description:
Vitruvius De Architectura Liber IX Chapter 8 paragraph 5the water flowing through the hole equably, raises an inverted bowl, called by the workmen phellos, or the tympanum, with which are connected a rule and revolving drum wheels with perfectly equal teeth, which teeth, acting on one another, produce revolutions and measured motion. There are other rules and other wheels, toothed in a similar manner, which acted upon by the same force in their revolutions, produce different species of motion, by which figures are made to move, cones are turned round, stones or oviform bodies are ejected, trumpets sounded, and similar conceits effected.
I think its sufficient description to the mechanical function of those mechanisms.
3 As said the Merriam deifinition rules out anything that is not a fullymechanical clock , technically speaking , but considering water powered ones and without use of pendulums then it fits the description of escapement devices used in the greek clocks as well as the chineese ones.
but for future reference I sugest you to consider more precise specific engeneering and scientific texts rather than pick only definition on personal convenience.
A more precise and scientific definition :
The escapement is a mechanism that allows the discretization of motion in a rotational impulse,in particular the escapement is usually part of a chain of gears induced to rotate by a motor, which can be a spring or a weight which tends to unroll from a cylinder, in the absence of which the gears simply would rotate quickly up to download the engine, causes a step-by-step advancement of those, periodically freeing the teeth This is advancement in step to produce the classic ticking clocks.