Abstract: The specification discloses a timer including a housing having a display aperture in the front surface thereof. A light emitting diode display is mounted within the display aperture for displaying multiple digits. A U-shaped bracket pivotally connects to the housing and has a base surface which is adapted to be attached to a telephone set for ease of viewing by the telephone user. Timing circuitry within the housing generates periodic timing signals and drives the display to display time intervals to the telephone user. A switch is positioned on the housing for actuation by the telephone user to start and stop operation of the circuitry.

Abstract: This invention is a spring driven timer with primary and secondary time selection knobs rotating on a common center. The knobs are connected to a solid and a hollow concentric shaft, respectively, which in turn are connected to respective hammer mechanisms. When the primary knob is turned, a tab simultaneously turns the secondary knob to a desired longer time interval. Then the primary knob is set at a desired shorter time interval. When each knob (turned by a common clock mechanism) reaches the 0 time position, each respective hammer is impacted upon a single common bell. Two possible external embodiments of the device are presented.

Abstract: A circuit for adjusting the frequency of operation of an electronic time keeping device, which device includes a source of clock pulses. The circuit of this invention is preferably located between the source of clock pulses and the time keeping device counting circuitry, so that the clock pulses can be periodically interrupted for a programmed amount of time. Accordingly, the variable adjustment capacitor, typically employed in prior art time keeping devices, can be eliminated.

Abstract: A digital display type timepiece has a 2-digit decimal numerical figure display section divided in a manner to correspond to an hour and a minute display with a dividing display mark therebetween. A month and date-of-month display can also be made, by switching, on the same decimal display section. A time display is effected on the decimal display section by count outputs of time counters adapted to be driven by reference signals of an oscillator. During the time display, the display mark is flashed in a predetermined second cycle by the reference signal of the oscillator. The date display is made on the same display section by count outputs of date-of-month counters adapted to be driven by carry signals of the time counters. When switching is made from the time display to the date display, the display mark is correspondingly switched into a state different from the flashed state.