Does pulling the crown out of a watch help save battery life?

        This is a simple question that is asked of quartz watches very often. Does pulling the stem out of quartz watches extend the battery life in the watch? There are many sides to this debate, some claiming that certain manuals recommend it, others refuting this point.
         Mechanically speaking, the crown in a quartz movement  stops the hands from running, and allows them to be adjusted. Some movements actually disengage the battery from the movement, making it so the movement is not drawing power, while others just disconnect the hands from the movement, the battery still functioning in the watch, but the hands not engaged. There are even some kinds of watches that actually drain more battery when the hands are disengaged, due to the movement not having to pull the weight of the hands.
         Now, while there may be some slight benefits to pulling the crown out of some watches, but they are very slight. By leaving the crown open, you also make a place that humidity,dust and moisture may get into the watch. On top of this, the shelf life of the average watch battery is not the greatest. If you wanted to store the watch for a long time, the best option would be to take the battery fully out, which also protects you from the batteries swelling or leaking with age.

Clock History Part 4

         Horology evolved as humanity itself evolved, as the need to sail and navigate became a stronger means of trade and exploration. The ability to tell time was vital, as you could not tell how far along on navigation charts, or any map without knowing your speed and time. Speed was easy to tell. Using a knotted rope,  a weight ,and a hour glass  you could figure out how fast you were going at sea (this was called a "chip log" and very quickly became a standard instrument aboard ships). Throwing the weight overboard and starting the hourglass, the amount of knots that were unraveled from the weight would tell how fast the ship was going. This is where the navel speed "knots" came from.
          This was half of the equation for navigation. to accurately get a bearing on where you were at sea, you needed to know the time. The standard pendulum clock would not work, as the constant motion of the ship would jar and move the clock, making it inaccurate. Ship clocks had to be accurate enough that they couldn't gain or lose 10 seconds a day. In 1714, the British government offered a large prize for anyone that could solve this dilemma. The prize (which in modern day terms was about 20,000 pounds) was claimed by John Harrison in 1761. Harrison spent his life improving the device he made, which could accurately keep time at sea by a margin of plus or minus 5 seconds over the course of 10 weeks. The device, known as a Marine chronometer had weighted balances to account for the rocking of the ship, as well as the use of bearings to reduce friction.

Clock History Part 3

           As time went on the escapement became more complex. It began to use additional parts such as balance wheels or pendulums. A balance wheel is a tiny wheel with a hair spring that moves back and forth to keep the escapement in rhythm. a balance wheel uses the same principle as a pendulum swinging back and forth. Both of these objects replaced water, forming the first mechanical clocks. The balance wheel came before the pendulum .The benefit of a pendulum was that it was a  harmonic oscillator; the time being kept by the movement of the pendulum back and forth.
          Mechanical spring clocks, meaning the use of a main spring was used as a form of power came around the 15th century. A main spring is a strip of  metal that stores energy for the clock to run. when compressed, it forms a tightly wound spiral. the reason this stores energy is simple, the mainspring acting like a bucket of water, the water being energy for the clock, and the mainspring being the bucket to hold the water.
        It was also around this time that clock making began to flourish. horology grew more widespread around the world as trade and a need to keep time grew more and more prevalent.