Building the clock pointer is directly exposed to the outside, used in the industry known as the tower clock; There will be a pointer enclosed inside the shell and bell bell glass, used to call big disk or bedding face bell bell. The same specifications of the clock, tower clock movement than bedding face clock movement, the corresponding master clock driving power is also big. So the same specifications of the high cost than bedding face clock tower clock, especially three or five years ago. Construction in recent years, manufacturer of clock tower clock movement increasing varieties, in order to adapt to a variety of specifications of the tower clock, thus tend to be more close to the cost, the coupled with bedding face clock because with glass, transportation cost is greater than the tower clock. In addition, the tower clock no clock glass, there is no glance, visual effect is better, so is preferred to choose tower clock. The current is greater than 2.6 m by 3.2 m glass do not bought, so add the border around the clock shell specifications largest bedding face clock normally only be 2.8 m by 3.4 m.
Building the clock of the most basic function is to indicate time, additional function with standby power is the most basic. Mentioned above is the most typical public building clock clock, influence is very big, so the additional standby power is necessary, otherwise stop electricity, tripping or line fault, stop the clock. Other additional functions of the most commonly used time, lighting, GPS (global positioning system) school. GPS can be accurate output pulse signal, the most common GPS output pulse and the error of the standard time of seconds and only about one over one million of a second positive and negative, and the operation is very reliable. If necessary it can also be additional computer monitoring function. If add some other optional function, can make the system is too complex, but reduce the reliability of the system.
Noctilucent form has the following several kinds: outside light, luminous clock dial pervious to light type, scale pointer luminous. Outside lighting can be used to shoot the light immediate illuminate is dial, a simple, easy to maintenance. Luminous clock dial light type: the translucent sheet material production clock face, light source inside the clock tower installation, make the light passes clockface luminous effect. Due to limited by plate specifications, for larger specifications clock face, need to joining together, and therefore must have dial frame, frame design of good, and have very good adornment sex. Pointer scale noctilucent multi-purpose semiconductor light-emitting diode (LED) as a light source, its life is longer, if used properly, its service life can be up to 10 years. Pointer and dial into light box form to the luminous effect, because the pointer is rotating, so need to use the brush to the pointer of light power supply, some relatively large amount of maintenance.