Electronic sound alarm clock

Claim 2

An electronic sound alarm clock comprising a clock mechanism, an electric source circuit including a pair of contacts to be closed by said clock mechanism at a predetermined time, said electric source circuit providing an output voltage, a voltage controlling means operatively connected to said electric source circuit and responsive to said output voltage for providing an output signal having an amplitude which varies as the time lapses, an oscillator means operably connected to said voltage controlling means and operable in accordance with said varying amplitude of the output signal from the voltage controlling means for producing an oscillating output signal having a frequency in the audible range, which frequency varies as the time lapses, and a converter means for converting said output signal from said oscillator means into acoustic energy.

Claim 3

An alarm clock according to claim 1, in which said electric source circuit is provided with a capacitor connected at its both ends through a switch means so as to be charged through a charging resistor, and said voltage controlling means is adapted to apply the voltage at both ends of said capacitor to said oscillator means.

Claim 4

An alarm clock according to claim 1, in which said voltage controlling means comprises a control section having an output voltage which rises as the time lapses and a nonstable multivibrator to which said voltage from the control section is applied.

Claim 5

An alarm clock according to claim 1, in which said voltage controlling means is adapted to obtain an output voltage of a constant level for a predetermined time period after said contacts are closed and, thereafter, to increase said output voltage as the time lapses.

Claim 6

An alarm clock according to claim 4, in which said electric source circuit is provided in a connectable arrangement there with a series circuit of a charging capacitor and a controlling resistor, and said voltage controlling means includes a controlling transistor which receives at its base the variation in potential at junction point of said capacitor and controlling resistor so that the conduction of said transistor will be controlled.

Claim 7

An electronic sound alarm clock comprising a clock mechanism, an electric source circuit including a pair of contacts to be closed by said clock mechanism at a predetermined time, said electric source circuit providing an output voltage, a voltage controlling means operatively connected to said electric source circuit and responsive to said output voltage for providing an output signal having an amplitude which varies as the time lapses, an oscillator means operably connected to said voltage controlling means and operable in accordance with said varying amplitude of the output signal from the voltage controlling means for producing an oscillating output signal having a frequency in the audible range, which frequency varies as the time lapses, and a converter means for converting said output signal from said oscillator means into acoustic energy, said voltage controlling means comprising a parallel circuit of a discharging capacitor and a discharge resistor, a snooze switch connected in series to said parallel circuit, a transistor connected in parallel to said snooze switch with its base and emitter having an emitter resistor, and a load inserted between the collector of said transistor and said capacitor connected at the other end to the base of said transistor.

Claim 8

An electronic sound alarm clock comprising a clock mechanism, an electric source circuit including a pair of contacts to be closed by said clock mechanism at a predetermined time, said electric source circuit providing an output voltage, a voltage controlling means operatively connected to said electric source circuit and responsive to said output voltage for providing an output signal having an amplitude which varies as the time lapses, an oscillator means operably connected to said voltage controlling means and operable in accordance with said varying amplitude of the output signal from the voltage controlling means for producing an oscillating output signal having a frequency in the audible range, which frequency varies as the time lapses, and a converter means for converting said output signal from said oscillator means into acoustic energy, said voltage controlling means comprising a parallel circuit of a discharging capacitor and a discharge resistor, a snooze switch connected in series to said parallel circuit, a transistor connected in parallel to said snooze switch with its base and emitter having an emitter resistor, and a load inserted between the collector of said transistor and said capacitor connected at the other end to the base of said transistor.

Claim 9

An electronic sound alarm clock comprising a clock mechanism, an electric source circuit including a pair of contacts to be closed by said clock mechanism at a predetermined time, said electric source circuit providing an output voltage, a voltage controlling means operatively connected to said electric source circuit and responsive to said output voltage for providing an output signal having an amplitude which varies as the time lapses, an oscillator means operably connected to said voltage controlling means and operable in accordance with said varying amplitude of the output signal from the voltage controlling means for producing an oscillating output signal having a frequency in the audible range, which frequency varies as the time lapses, and a converter means for converting said output signal from said oscillator means into acoustic energy, said voltage controlling means comprising a snooze circuit comprising a parallel circuit of a charging and discharging capacitor, a snooze switch connected in series to said parallel circuit, and a transistor connected to both ends of the series circuit of said capacitor and snooze switch, with a resistor being connected to the emitter and collector of said transistor, and a nonstable multivibrator adapted to receive the output from said snooze circuit.

Claim 10

An electronic sound alarm clock comprising a clock mechanism, an electric source circuit including a pair of contacts to be closed by said clock mechanism at a predetermined time, said electric source circuit providing an output voltage, a voltage controlling means operatively connected to said electric source circuit and responsive to said output voltage for providing an output signal having an amplitude which varies as the time lapses, an oscillator means operably connected to said voltage controlling means and operable in accordance with said varying amplitude of the output signal from the voltage controlling means for producing an oscillating output signal having a frequency in the audible range, which frequency varies as the time lapses, and a converter means for converting said output signal from said oscillator means into acoustic energy, said voltage controlling means comprising a snooze circuit comprising a parallel circuit of a charging and discharging capacitor, a snooze switch connected in series to said parallel circuit, and a transistor connected to both ends of the series circuit of said capacitor and snooze switch, with a resistor being connected to the emitter and collector of said transistor, and a nonstable multivibrator adapted to receive the output from said snooze circuit.