Gas Oven Thermostat

I read that when a tap / oven thermostat is turned on for the first gas flows first through the oven thermostat to the Full Rate and flame monitoring design.
Does this mean the "full rate" of that mark setting, for example, 5, or "possible full rate, regardless of this setting selected if its 1 or 9, until the thermostat starts to work .
Very difficult to explain, Thanks for your patience

I think the following will fully explain the operation.

*... The pilot flame is heating the oven with a thermocouple which keeps the main gas valve open power and pressure of the gas is supplied by a gas control valve as fully open at this point, as the valve gas oven (button).
*... When you turn on the oven, the gas will be transported at full flow and is ignited by the pilot flame.
(If the pilot is not lit, the thermocouple will not work and the main gas valve will not open. The couple is also a thermal safety device).
*... An oven temperature sensor connected to the thermostat (not associated with the pilot), measures the temperature of the oven and, as it is close to the thermostat setting, the gas control valve starts to close automatically reduce the gas flow.
*... The gas never goes out completely, but maintains the temperature set point thermostat by small variations in gas flow on the thermostat.
*... The thermostat is an expansion of the liquid filled with liquid, the bulb and metal line system attached to the capillary wall of the furnace inside near the top. It is connected to a diaphragm control valve of gas. As the oven heats, the liquid in the bulb expands and the pressure due to expansion is transmitted along the capillary tube and the gas valve.
*... The pressure on the diaphragm controls the opening of the gas control valve and therefore controls the temperature of the oven thermostat setting.

You do not really know what to say. The principle is that any thermostat at a set point switch (electric) or valve (gas) is closed or open, if necessary. The operation of the electric thermostat is simple, it is on or off. Any intermediate state would lead to massive power dissipation in the switch.

In the case of a gas oven stat valve must reduce the flow to a low value if the flame is not extinguished. It may be a range over which the gas flow is varied. ie it is not an on / off the device.