Time or date displayed in a similar way to On Kawara's 'Today Series' paintings.Ī clock made of words. GE clocks sometimes had this feature.A curated list of screensavers for macOS. However, on some newer clocks, forward and backward time setting is possible. Instead they must be either wound forward 23 hours to achieve the effect of winding back 1 hour at the end of daylight saving time or the clock may be stopped (by disconnecting it from power) for 1 hour. Many vintage digital clocks with split flap displays cannot be wound back, as the flip mechanism operates only in one direction. This hook will catch any falling hour leaf (as mentioned above, it falls from its metal tab a few minutes before the hour) until it is released by the minute leaf's fall at the top of the hour. The purpose of this tooth is as follows: at 45 minutes after the hour, the tooth pushes a small hook that protrudes into the hour wheel area. Minute leaves 45 through 59 have a small tooth on their left edges, pointing toward the hour leaves. The disadvantage of this is that 24-hour clocks cannot use this design, nor there is a way to show 'AM' or 'PM' information in a 12-hour design. A different design features 60 leaves with the numbers 1 to 12 repeated in fives, each leaf falling after 12 minutes.

One leaf falls each half-hour, at approximately 25 and 55 minutes after the hour.

Having two sets of leaves for each hour also allows the clock to alternate between 12- and 24-hour display, every half hour, like this: 12 am, 0 h, 1 am, 1 h, 2 am, 2 h. There are two of each hour, like this: 12 am, 12 am, 1 am, 1 am, 2 am, 2 am.

These leaves have hour numbers printed on them. The slower wheel has connected to it a similar ring of leaves, only there are 48 leaves on this ring. This ring is put into position and rotated so that one page falls each minute, showing a new number for the minutes. The 'book' is opened vertically, and its pages form a ring. On the leaves are printed numerals so that, when a person holds two adjacent leaves apart like an open book, the two open leaves spell out a numeral, and flipping a leaf down increases the number shown by 1 unit. The faster wheel has connected to it a ring of 60 flat plastic leaves. The small hook which retains the hour leaves until the top of the hour can be dimly seen, retracted, in the inset. This is a synchronous electric clock which is kept to the correct time by the 50/60 Hz AC power grid. The narrow numbered wheel and knobs on the left are the alarm mechanism. The inset shows the metal tab holding back the top flap. Mechanism of a split-flap alarm clock, removed from its case.

Fliqlo clock