on them. ✤ Some alarm clocks have buzzers, radios, and other, different methods of making noise. ✤ There are alarms for the deaf that have flashing lights or vibrating devices.
a large water clock with an unspecified alarm signal similar to the sound of a water organ. ✤ Churches are essentially giant alarm clocks. They started that annoyance in the 14th century. ✤ The first alarm clock was patented by Seth E. Thomas in 1876. Jerk. ✤ A shortage of alarm clocks in World War II left people not deployed sleeping in.
clocks that stops the alarm and sets it to ring a short time later. ✤ Often this is 9 minutes, the largest single digit number. It simplifies the logic circuitry in the clock. ✤ I use this a lot.