Bizarre Patents
Wearable Device For Feeding and Observing Birds and Other Flying Animals
A device for feeding and observing flying animals comprising a hat, a support mounted on the hat and extending outward from the hat, and a feeder mounted on the support.
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| Number | Title | Issue Date |
| 5761295 | Telephone instrument and method for altering audible characteristics A telephone instrument creates spatially simulated sound signals from signals received from a telephone line. The monaural signals are separated to two left and right channels. In each channel, the signals are processed via a direct path, an early reflect... | 06/02/1998 |
| 5548584 | Telephone switching system with switched line circuits An analog switch matrix provides limited connectability between a plurality of n telephone line appearances and a lesser plurality of m line interface circuits each connected with a communication path in a telephone system. The analog switch matrix includ... | 08/20/1996 |
| 5506566 | Tamper detectable electronic security package An intrusion detection electronic circuit package, includes a containment wall in combination with first and second transmission lines being organized in patterns spaced adjacent one another. Electronic circuitry, residing within the containment wall, inc... | 04/09/1996 |
| 5485514 | Telephone instrument and method for altering audible characteristics A telephone instrument creates spatially simulated sound signals from signals received from a telephone line. The received signals are directed to left and right channels. In each channel, the signals are processed via a direct path, an early reflection p... | 01/16/1996 |
| 5473683 | Post assembly process for adjusting the gain of an electret microphone within a communications apparatus A post assembly process for enabling a manufacturer of acoustical communications apparatus, such as telephones and the like, to conveniently trim a sensitivity characteristic of an electret microphone therein, after assembly of the apparatus, whereby a un... | 12/05/1995 |
| 5189697 | Line interface circuit A line interface circuit supplies energizing direct current from a power source via tip and ring leads of a two wire communications line connected with a telephone apparatus, and also couples alternating current signals between the telephone line and an a... | 02/23/1993 |
| 5099472 | Hands free telecommunication apparatus and method In a hands free communications terminal apparatus, a loudspeaker and a microphone are permitted to be simultaneously active. A controller monitors signals in transmit and receive paths to direct operations of transversal filters to provide two echo cancel... | 03/24/1992 |
| 5089927 | Power feed circuit for digital communications terminal equipment Integrated Services Digital Network (ISDN) terminal equipments (TEs) are remotely powered from a central source via line interface circuits. One function of the line interface circuit is that of conducting energizing direct current for the associated tele... | 02/18/1992 |
| 5073923 | Private telephone system with unified command feature A key telephone system, having ports for connection to telephone lines of a telephone exchange and ports for connection of terminal apparatus including key telephone sets, is provided with the ability to distinguish if an intended call or feature access i... | 12/17/1991 |
| 5044506 | Equipment shelf An equipment shelf, for removably retaining circuit boards at selectably spaced locations in a system, includes side panels being connected in a spaced relationship one with another by extruded aluminum cross connecting members. A board slider retaining e... | 09/03/1991 |
| 5033627 | Equipment shelf An equipment shelf includes circuit board slides being arranged to support edges of circuit boards, whereby the circuit boards are removably retained in a system. First and second end panels are fixed in a spaced apart relationship by a pair of front cros... | 07/23/1991 |
| 4996684 | Electronic systems and effective reduction of electromagnetic interference energy propagation from electronic systems An electronic system includes at least one element which is operative in response to clock signal pulses, of less than a maximum frequency of occurrence, from a clock signal source. A dither means is connected to the clock signal source for causing the fr... | 02/26/1991 |
| 4944004 | Interface circuit with transient event tolerance An interface circuit provides for coupling of communications signals between a conductor of a transmission path, and a key telephone system and provides for protection against electrical energies, as may be associated with transient electrical event occur... | 07/24/1990 |
| 4922531 | Line interface circuit A telephone line interface circuit includes a transformer with tip and ring windings connected between tip and ring feed resistors and tip and ring leads of a telephone line for feeding energizing current from telephone facility to the telephone line. A s... | 05/01/1990 |
| 4864609 | Telephone line interface circuit A telephone line circuit transformer couples tip and ring leads of a telephone line to a telephone facility. Tip and ring transformer windings are connected in series with the respective tip and ring leads, tip and rings feed resistors and terminals of a ... | 09/05/1989 |
| 4829567 | Line interface circuit A line interface circuit supplies energizing current for operation of a two wire communication line and couples a.c. signals between the communication line and a telephone facility. Tip and ring rails are resistively connected to the communication line by... | 05/09/1989 |
| 4791668 | Selectable impedance line interface circuit An interface circuit a.c. couples a transmission line and a port of a telecommunications facility. The transmission line may be of any of n characteristic impedances. The interface circuit includes a resistor network having at least 2n+1 resistor elements... | 12/13/1988 |
| 4785530 | Hand tool for aiding closure of integrated circuit storage cartridges A hand tool for assisting in the manual closure of integrated circuit (IC) storage and shipping cartridges, includes a base and a shank extending normal from one end of the base and terminating at a grip or stop formation. A pair of tines extends normal f... | 11/22/1988 |
| 4764956 | Active impedance line feed circuit A typical active impedance line feed circuit includes tip and ring amplifiers being controlled in response to signals at tip and ring voltage taps by control circuit to exhibit a.c. impedance and d.c. resistance characteristics for the purpose of supplyin... | 08/16/1988 |
| 4713838 | Amplifier with double rail output An amplifier with double rail output being a switchable to single rail output is provided by power pumping circuitry which is controllable by an error detector to deliver modulated power pulses from a d.c. power source to on-following current steering cir... | 12/15/1987 |
| 4691271 | Voltage multiplier and voltage multipliers in an amplifier with double rail output An amplifier with double rail output being a switchable to single rail output is provided by power pumping circuitry which is controllable by an error detector to deliver modulated power pulses from a d.c. power source to on-following current steering cir... | 09/01/1987 |
| 4684832 | Analog circuit improvement in a digital integrated circuit technology A CMOS integrated filter includes a passive network of resistive and capacitive paired elements and a first differential amplifier, for implementing a second order low pass filter function. A second amplifier is connected in voltage following configuratio... | 08/04/1987 |
| 4665531 | Alternate mark inversion (AMI) receiver An AMI signals receiver generates a logic signal stream representative of AMI encoded information signals which have traversed a transmission medium. Adaptive compensation circuits are responsive to characteristics of the received AMI signals for generati... | 05/12/1987 |
| 4656450 | Transformer and ferrite core structure therefor A ferrite core structure for line circuit transformers includes a ferrite spindle for receiving transformer windings, thereby avoiding the need for a separate bobbin as used in conventional line circuit transformers. The ferrite core structure includes a ... | 04/07/1987 |
| 4654488 | Push and rocker action switch A push and rocker action switch includes a pair of switchable contacts, either of which is switchable in response to a rocker motion of a depressible actuating member, and both of which are switchable at the same time in response to an overall push depres... | 03/31/1987 |
| 4580013 | Handsfree communication apparatus and method A handsfree communication terminal apparatus includes a transit switch being controllable for passing signals from a microphone to a transmission interface, during a transmit mode of operation, and a receive switch being controllable for passing signals f... | 04/01/1986 |
| 4571460 | Active impedance line feed circuit with improved ground fault protection A typical active impedance line feed circuit includes tip and ring amplifiers being controlled to exhibit a.c. impedance and d.c. resistance characteristics for the purpose of supplying energizing current for tip and ring leads of a two wire communication... | 02/18/1986 |
| 4562310 | Keyboard security for a telephone attendant console An attendant console for use with an electronic private automatic branch exchange (EPABX) includes a jack for removably connecting an attendant headset or handset to the console. A switch array in the console provides indications of attendant control acti... | 12/31/1985 |
| 4539531 | Phase locked loop variable oscillator with switched capacitors A variable oscillator, suitable for integration as part of a phase lock loop (PLL) clock source in a complementary metal oxide semiconductor (CMOS) integrated circuit, includes an amplifier and terminals for connection to a tank circuit, for example a cry... | 09/03/1985 |
| 4539438 | Active impedance transformer assisted line feed circuit with supervision filtering A supervision filtering function is included in a line circuit wherein tip and ring voltage amplifiers supply energizing current to a two wire communication line via tip and ring primary windings of a transformer and tip and ring feed resistors. The tip a... | 09/03/1985 |
| 4532381 | Active impedance line feed circuit Normal operating range of an active impedance line feed circuit is extended to at least that of a prior art passive resistance line feed circuit. The active impedance line feed circuit includes tip and ring feed resistors in series with outputs of tip and... | 07/30/1985 |
| 4528664 | Call progress signal monitor and method for telephone systems A call progress signal monitor includes a translation circuit for generating data signals indicative of predetermined signal characteristics in a TDM PCM signal channel. A processor implemented detection circuit is responsive to the data signals for detec... | 07/09/1985 |
| 4528676 | Echo cancellation circuit using stored, derived error map An automatic correction circuit is responsive to suitable bit patterns in a bit stream being received from a transmission medium, to generate an error amplitude map of signal distortion being introduced by the transmission medium. The error amplitude map ... | 07/09/1985 |
| 4514595 | Active impedance line feed circuit A line circuit includes tip and ring voltage amplifiers each having an output resistively connected via tip and ring feed resistors to tip and ring leads in a telephone line. The tip and ring feed resistors have closely matched ohmic values, and are part ... | 04/30/1985 |
| 4498171 | Tone source for telephone systems A tone source is automatically adaptable in operation to generate tones as required for virtually any TDM telephone system in accordance with stored tone samples being defined to meet the requirements of a particular one of the telephone systems. The tone... | 02/05/1985 |
| 4484032 | Active impedance transformer assisted line feed circuit A transformer assisted active impedance line circuit includes a transformer of reduced size as compared to both conventional and d.c. flux reduced transformer line circuits. The transformer has tip and ring primary windings consisting of equal turns and a... | 11/20/1984 |
| 4446338 | Telephone lines status sensor A lines status sensor provides for monitoring of the operating status of one or more telephone lines at an associated telephone station apparatus. The lines status sensor includes a translation circuit being responsive to potential differences appearing a... | 05/01/1984 |
| 4440989 | Key telephone area voice paging circuit and method An area voice paging feature is provided in a key telephone system wherein key telephone station sets each have a loudspeaker circuit responsive to a d.c. control signal, on an associated signalling path, to audibly reproduce voice band signals superimpos... | 04/03/1984 |
| 4322586 | Transformerless line interface circuit A line circuit includes a fixed resistance feed consisting of a pair of resistors connected in series with a d.c. power source and tip and ring leads of a communication line. A variable current feed includes a current sink and a current source also connec... | 03/30/1982 |
| 4319086 | Voice switch for hands free communication apparatus First syllable clipping typically associated with simple control circuits in hands free telephony, is substantially reduced by using a voice switch with non-linear response characteristics. The voice switch includes field effect devices in transmit and re... | 03/09/1982 |
