Syncing occurs automatically when you open the Fitbit App on your Android device and have your Zip nearby. Force Sync You can also Force Sync your Zip through the Device Settings to get your trackerâs latest data synced to your Android device.f your iOS deviceâs screen is off, your Zip will not sync in the background until you wake your iOS device from sleep. Force Sync You can also Force Sync your Zip through the Devices menu if you want to get the latest data synced. To Force Sync your Zip: 1. Open the Fitbit App.
And in 1902, a 25-year-old engineer from New York named Willis Carrier invented the first modern air-conditioning system. The mechanical unit, which sent air through water-cooled coils, was not aimed at human comfort, however; it was designed to control humidity in the printing plant where he worked.
When the engineer applied these brakes, the pipe filled with air and squeezed the brakes. In 1869, an engineer named George Westinghouse realized the importance of safety in the relatively new railroad industry and invented the first triple-valve air-brake system for railcar use.Westinghouseâs system worked the opposite way of a direct air-brake system. Once the system reaches its operating pressure, the brakes are freed and ready to use. 2  Applying: As the brakes are applied, air pressure decreases. 3  As the amount of air decreases, the valve allows air back into the reservoir tanks, while the brakes move to the applied position.