Back to results
US 3,939,953 AGranted
Coin discriminating apparatus
AssigneeMitani Shoji Kabushiki Kaisha
InventorKuniaki Miyazawa
Life of this patent
Estimating the term…
Abstract
In a coin discriminating apparatus containing a feedback oscillator circuit having a feedback loop, a mechanical filter is arranged and includes a discriminated coin, a speaker to vibrate the coin and a sensor to pick up the vibration of the coin; a one cycle selector for taking out one period of the vibration frequency generated at the oscillator circuit; means for quantizing the output signal of the one cycle selector by clock pulses; counter means including a scale-of-1000 counter and a decoder for counting the number of clock pulses; and bistable circuit means whose state is reversed on receipt of an output produced at the decoder when contents of the counter run up to the lower limit or the upper limit of a tolerance predetermined under the crossing rate distribution for natural frequencies of a genuine coin.
Claims14
A coin discriminating apparatus comprising:
- a coin detector means for sensing a coin fed to the apparatus and for producing a starting signal;
- a mechanical filter mechanism including a speaker, a pressure sensitive senser, a horizontally and vertically inclined passageway for said coin, a stopper for projection into said passageway, said coin fed to the apparatus being held between said speaker and said senser in said passageway by said stopper as said coin rolls down said passageway;
- a selective oscillator circuit having a positive feedback loop connected in series with said senser and speaker in which said mechanical filter mechanism is interposed to generate an oscillation output at the same frequency as the mechanical natural frequency of the coin fed to the apparatus;
- a one cycle selector circuit connected to said selective oscillator circuit adapted to take out one period of the oscillation frequency generated at said selective oscillator circuit;
- means connected to said one cycle selector circuit for producing impulses whose number depends on the wave length of said one period each time a coin is fed to the apparatus;
- and means connected to said means for producing impulses for determining whether the number of said impulses is within a range predetermined by a genuine coin to be discriminated.
3 more elements
A coin discriminating apparatus comprising:
- a coin detector means for sensing a coin fed to the apparatus and for producing a starting signal;
- a mechanical filter mechanism including a speaker, a pressure sensitive senser, a horizontally and vertically inclined passageway for said coin, a stopper for projection into said passageway, said coin fed to the apparatus being held between said speaker and said senser in said passageway by said stopper as said coin rolls down said passageway;
- a selective oscillator circuit having a positive feedback loop connected in series with said senser and speaker in which said mechanical filter mechanism is interposed to generate an oscillation output at the same frequency as the mechanical natural frequency of the coin fed to the apparatus;
- a one cycle selector circuit connected to said selective oscillator circuit adapted to take out one period of the oscillation frequency generated at said selective oscillator circuit;
- means connected to said one cycle selector circuit for producing impulses whose number depends on the wave length of said one period each time a coin is fed to the apparatus;
- and means connected to said means for producing impulses for determining whether the number of said impulses is within a range predetermined by a genuine coin to be discriminated, wherein said coin passageway comprises an inclined coin passageway portion inclined with respect to a horizontal plane and a vertical plane passing therethrough, wherein said pressure sensitive senser comprises a piezo-electric element and a semi-spherical tip made of a synthetic resinous material and attached to the top of said piezo-electric element, said tip being adapted to cooperate with said stopper to hold at two points the coin when said stopper is projected into said inclined coin passageway portion.
3 more elements
A coin discriminating apparatus comprising:
- a coin detector means for sensing a coin fed to the apparatus and for producing a starting signal;
- a mechanical filter mechanism including a speaker, a pressure sensitive senser, a horizontally and vertically inclined passageway for said coin, a stopper for projection into said passageway, said coin fed to the apparatus being held between said speaker and said senser in said passageway by said speaker and said senser in said passageway by said stopper as said coin rolls down said passageway;
- a selective oscillator circuit having a positive feedback loop connected in series with said senser and speaker in which said mechanical filter mechanism is interposed to generate an oscillation output at the same frequency as the mechanical natural frequency of the coin fed to the apparatus;
- a one cycle selector circuit connected to said selective oscillator circuit adapted to take out one period of the oscillation frequency generated at said selective oscillator circuit;
- means connected to said one cycle selector circuit for producing impulses whose number depends on the wave length of said one period each time a coin is fed to the apparatus;
- and means connected to said means for producing impulses for determining whether the number of said impulses is within a range predetermined by a genuine coin to be discriminated, wherein said selective oscillator circuit comprises:
- a series circuit of a first gate and a limiter interposed in said positive feedback loop;
- a series circuit of a phase inverter and a second gate connected in parallel to said first gate:
- an astable multivibrator which is energized with the starting signal generated by said coin detector means so as alternately to open and close both gates;
- and means for locking the astable multivibrator into a state at which the feedback phase of the selective oscillator circuit is positive.
7 more elements
A coin discriminating apparatus comprising:
- a coin detector means for sensing a coin fed to the apparatus and for producing a starting signal;
- a mechanical filter mechanism including a speaker, pressure sensitive senser, a horizontally and vertically inclined passageway for said coin, a stopper for projection into said passageway, said coin fed to the apparatus being held between said speaker and said senser in said passageway by said stopper as said coin rolls down said passageway;
- a selective oscillator circuit having a positive feedback loop connected in series with said senser and speaker in which said mechanical filter mechanism is interposed to generate an oscillation output at the same frequency as the mechanical natural frequency of the coin fed to the apparatus;
- a one cycle selector circuit connected to said selective oscillator circuit adapted to take out one period of the oscillation frequency generated at said selective oscillator circuit;
- means connected to said one cycle selector circuit for producing impulses whose number depends on the wave length of said one period each time a coin is fed to the apparatus;
- and means connected to said means for producing impulses for determining whether the number of said impulses is within a range predetermined by a genuine coin to be discriminated, wherein said selective oscillator circuit comprises at least one cascade connection circuit interposed in the positive feedback loop, said cascade connection circuit including a phase shift circuit, a limiter, a band phase filter and an impedance converter.
3 more elements
A coin discriminating apparatus comprising:
- a coin detector means for sensing a coin fed to the apparatus and for producing a starting signal;
- a mechanical filter mechanism including a speaker, a pressure sensitive senser, a horizontally and vertically inclined passageway for said coin, a stopper for projection into said passageway, said coin fed to the apparatus being held between said speaker and said senser in said passageway by said stopper as said coin rolls down said passageway;
- a selective oscillator circuit having a positive feedback loop connected in series with said senser and speaker in which said mechanical filter mechanism is interposed to generate an oscillation output at the same frequency as the mechanical natural frequency of the coin fed to the apparatus;
- a one cycle selector circuit connected to said selective oscillator circuit adapted to take out one period of the oscillation frequency generated at said selective oscillator circuit;
- means connected to said one cycle selector circuit for producing impulses whose number depends on the wave length of said one period each time a coin is fed to the apparatus;
- and means connected to said means for producing impulses for determining whether the number of said impulses is within a range predetermined by a genuine coin to be discriminated, including a collation processing timer connected to said coin detector.
3 more elements
A coin discriminating apparatus comprising:
- a coin detector means for sensing a coin fed to the apparatus and for producing a starting signal;
- a mechanical filter mechanism including a speaker, a pressure sensitive senser, a horizontally and vertically inclined passageway for said coin, a stopper for projection into said passageway, said coin fed to the apparatus being held between said speaker and said senser in said passageway by said stopper as said coin rolls down said passageway;
- a selective oscillator circuit having a positive feedback loop connected in series with said senser and speaker in which said mechanical filter mechanism is interposed to generate an oscillation output at the same frequency as the mechanical natural frequency of the coin fed to the apparatus;
- a one cycle selector circuit connected to said selective oscillator circuit adapted to take out one period of the oscillation frequency generated at said selective oscillator circuit;
- means connected to said one cycle selector circuit for producing impulses whose number depends on the wave length of said one period each time a coin is fed to the apparatus;
- and means connected to said means for producing impulses for determining whether the number of said impulses is within a range predetermined by a genuine coin to be discriminated, including a definite oscillation discriminator comprising an AND circuit and a rectifier circuit interposed between the both inputs of said AND circuit, said definite oscillation discriminator being interposed between said selective oscillator and said cycle selector.
3 more elements
A coin discriminating apparatus comprising:
- a coin detector means for sensing a coin fed to the apparatus and for producing a starting signal;
- a mechanical filter mechanism including a speaker, a pressure sensitive senser, a horizontally and vertically inclined passageway for said coin, a stopper for projection into said passageway, said coin fed to the apparatus being held between said speaker and said senser in said passageway by said stopper as said coin rolls down said passageway;
- a selective oscillator circuit having a positive feedback loop connected in series with said senser and speaker in which said mechanical filter mechanism is interposed to generate an oscillation output at the same frequency as the mechanical natural frequency of the coin fed to the apparatus;
- a one cycle selector circuit connected to said selective oscillator circuit adapted to take out one period of the oscillation frequency generated at said selective oscillator circuit;
- means connected to said one cycle selector circuit for producing impulses whose number depends on the wave length of said one period each time a coin is fed to the apparatus;
- and means connected to said means for producing impulses for determining whether the number of said impulses is within a range predetermined by a genuine coin to be discriminated, wherein said means for determining whether or not the number of pulses is within a predetermined range comprises counter means having at least one ring counter at and at least one decoder unit connected to said ring counter, at least one OR circuits having a pair of input terminals connected to any pair of a plurality of output terminals of said at least one decoder unit corresponding to a leading value and a trailing value of a predetermined range of values allowable for the cycle of the natural frequency of one of more than two types of coins being deemed a genuine coin in circulation, and at least one descriminating flip-flop connected to one of said OR circuits and disposed posterior thereto.
3 more elements
Dependencies are inferred from the claim text.