New tower clocks are usually constructed with dial movements that are driven by the impulse of a computer. They are also constructed with a central timepiece using dial drive rods with universals onto individual clock dials. The advantage of the first system is that there is be no need for lengthy drive rods. Advantage of the second system is cost. The dials of a tower clock can be made out of copper or a synthetic material, which allows for numerous dimension and model variations. Of course the clock dials and hands can be gold leafed as well as illuminated.
See also for example on page “Renovations”.
Mechanical tower clocks that must be wound by hand have not been made for quite a while. However, many towers still have hand wound clocks. These are kept for historic value. Petit & Fritsen is adequately equipped to maintain those clocks and to restore them if eventually needed. For example, a motor driven mechanism can be installed for automatic winding of the weights or to properly sequence and correct the hour striking, making sure that clock is always on time. In addition, new tower clock’s gears and computer controlled features can be handled with one dial, a motor for hand movement and a computer with one minute impulses (increments) to drive the clock hands. If so desired, a DCF pilot clock or GPS master clock controller can be tied into for running exact time on the clock dials.
Apart from that, new clockworks, clock motors and matching computers in almost unlimited forms, materials and dimensions can be installed. A clockwork consists mostly of a dial, a clock motor that drives the hands and a computer that controls the motor. As an option a DCF or GPS receiver can be connected in order to guaranty display of the exact time.