US Patent Class 377
ELECTRICAL PULSE COUNTERS, PULSE DIVIDERS, OR SHIFT REGISTERS: CIRCUITS AND SYSTEMS




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Current as of: June, 1999
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  DF  CLASS NOTES
1  DF  APPLICATIONS
2  DF  .~ Control
3  DF  .~ Counting on an object, areas having alternating physical properties (e.g., counting lines on grid, teeth on gear, windings on coil)
4  DF  .~ Betting on the outcome of an event; Totalizers
5  DF  .~ Game or sport
6  DF  .~ Counting animate or inanimate entities
7  DF  .~.~ Coins
8  DF  .~.~ Flat articles (e.g., sheet, bill, ticket)
9  DF  .~.~ Vehicles
10  DF  .~.~ Field of view contains plural entities or entities scanned plural times (e.g., microscopic particles)
11  DF  .~.~.~ Including particle size determination variations
12  DF  .~.~.~ Counting by detecting electrical impedance variations
13  DF  .~ Registering counts for different categories (e.g., accounting)
14  DF  .~.~ Where the different categories represent monetary amounts (e.g., wages, charges)
15  DF  .~ Counting based on number of times machine or apparatus operates
16  DF  .~ Determining machine or apparatus operating time or monitoring machine, apparatus or operation
17  DF  .~ Position determining
18  DF  .~.~ Of flat flexible strip (e.g., tape)
19  DF  .~ Measuring or testing
20  DF  .~.~ Time combined with measurement of another parameter
21  DF  .~.~ Fluid flow
22  DF  .~.~ Weight
23  DF  .~.~ Acceleration
24  DF  .~.~ Dimension
24.1  DF  .~.~.~ Distance and Powered Vehicle (e.g., odometer)
24.2  DF  .~.~.~ Distance and Human Activity (e.g., pedometer, nonpowered golf carts)
25  DF  .~.~ Temperature
26  DF  .~ Including memory
27  DF  SYSTEMS
28  DF  .~ Identifying or correcting improper counter operation (e.g., error checking, monitoring; preventing or correcting improper counter operation)
29  DF  .~.~ Testing or calibrating the counter
30  DF  .~.~ Preventing an inaccurate count as a result of an external condition
31  DF  .~.~.~ Automatic preset
32  DF  .~.~.~ Power failure
33  DF  .~ Using particular code or particular counting sequence
34  DF  .~.~ Minimum change code (e.g., Gray code)
35  DF  .~.~ Excess three code
36  DF  .~.~ Biquinary code
37  DF  .~ Sequential readout of plural counters or sequential sampling of inputs to a counter
38  DF  .~ Plug in counter
39  DF  .~ Comparing counts
40  DF  .~ Nonsignificant zero elimination
41  DF  .~ Complementing a count
42  DF  .~ Converting input or output signal from or to an analogue signal
43  DF  .~ Having phase shift
44  DF  .~ Counter controlled counter
45  DF  .~ Including reversible counter
46  DF  .~ Including ring counter
47  DF  .~ Pulse multiplication or division
48  DF  .~.~ Multiplication or division by a fraction
49  DF  .~ Counter includes circuit for performing an arithmetic function
50  DF  .~ Compensation for excess or shortage of pulses
51  DF  .~ Including structure for detecting or indicating overflow condition
52  DF  .~ With programmable counter (i.e., with variable base)
53  DF  .~ With photoelectric sensor
54  DF  .~ Using shift register
55  DF  .~ Particular input circuit
56  DF  .~ Particular output circuit
57  DF  CHARGE TRANSFER DEVICE (E.G., ANALOGUE SHIFT REGISTER, CCD, BUCKET BRIGADE DEVICE)
58  DF  .~ Compensating for or preventing signal charge deterioration
59  DF  .~ With feedback
60  DF  .~ Particular input or output means
61  DF  .~ Direction and/or path flow control (e.g., by clocking or biasing, by charge splitting)
62  DF  .~.~ In charge-coupled device
63  DF  .~ Charge-coupled device
64  DF  SHIFT REGISTER
65  DF  .~ Using electromechanical relays
66  DF  .~ Asynchronous
67  DF  .~ Multirank (i.e., rows of storage units form a shift register)
68  DF  .~ Compensating for or preventing signal deterioration
69  DF  .~ Shift direction control
70  DF  .~ Particular input circuit
71  DF  .~.~ Pulse shaping
72  DF  .~.~ With feedback
73  DF  .~.~ Including logic circuit
74  DF  .~.~.~ Field-effect transistor
75  DF  .~ Particular output circuit
76  DF  .~.~ Sequential output (e.g., tapped delay line)
77  DF  .~ Particular transfer means
78  DF  .~.~ Phase clocking or synchronizing
79  DF  .~.~.~ Field-effect transistor
80  DF  .~.~ Parallel clocking
81  DF  .~.~ Logic circuit
82  DF  ELECTROMECHANICAL COUNTER
83  DF  .~ Counting or dividing chains using relays
84  DF  .~ Programmable (i.e., with variable base)
85  DF  .~ Reversible
86  DF  .~ Particular input means
87  DF  .~ Particular output means
88  DF  .~ With resetting
89  DF  .~ Rotary magnet
90  DF  .~ Stepping switch
91  DF  .~ Clutch or escapement
92  DF  .~ Pawl and rachet
93  DF  WITH SUPERCONDUCTIVE ELEMENT
94  DF  COUNTING OR DIVIDING IN INCREMENTAL STEPS (I.E., STAIRCASE COUNTER)
95  DF  .~ Charge storage (e.g., capacitor without polarization hysteresis)
96  DF  .~.~ Using auxiliary pulse generator triggered by incoming pulses
97  DF  .~ Hysteresis storage (e.g., counters using saturable magnetic core elements)
98  DF  .~ DEVICES HAVING MORE THAN TWO STABLE STATES
99  DF  .~ Beam type tube (e.g., magnetron, cathode-ray tube)
100  DF  .~ Multi-cathode gas discharge tubes
101  DF  USING BISTABLE MAGNETIC CORES OR FERROELECTRIC CAPACITORS
102  DF  USING BISTABLE ELECTRO-OPTICAL DEVICES
103  DF  COUNTING OR DIVIDING CHAINS USING GAS-FILLED TUBES
104  DF  PHASED CLOCKING
105  DF  .~ Field-effect transistor
106  DF  PARTICULAR PARALLEL GATING OR CLOCK SIGNAL
107  DF  STARTING, STOPPING, PRESETTING OR RESETTING THE COUNTER
108  DF  .~ Counter chains with a radix or base other than the number two raised to an integral power
109  DF  .~.~ Decade
110  DF  .~.~ Programmable (e.g., with mechanical or electromechanical switch means for selecting the count
111  DF  PARTICULAR INPUT CIRCUITS FOR COUNTER
112  DF  INDICATING MEANS
113  DF  .~ Using glow discharge lamps
114  DF  PARTICULAR OUTPUT CIRCUITS FOR COUNTER
115  DF  PARTICULAR TRANSFER MEANS (E.G., MASTER-SLAVE)
116  DF  .~ Including logic circuit
117  DF  .~.~ Field-effect device (e.g., JFET, IGFET, MNOS)
118  DF  PULSE COUNTING OR DIVIDING CHAINS
119  DF  .~ Using bistable regenerative trigger circuits
120  DF  .~.~ Using only semiconductors having at least three electrodes
121  DF  .~.~.~ Field-effect device (e.g., JFET, IGFET, MNOS)
122  DF  .~.~.~ Ring counter
123  DF  .~.~.~ Reversible counter
124  DF  .~.~ Ring counter
125  DF  .~.~ Reversible counter
126  DF  .~ Ring or reversible counter
127  DF  .~ Using bistable semiconductors having at least three electrodes or analogous complementary transistor circuits (e.g., avalanche transistor, SCR's)
128  DF  .~ Using bistable semiconductors having only two electrodes (e.g., tunnel diode, multilayer diode)
129  DF  PULSES CONTINUOUSLY CIRCULATED IN A CLOSED LOOP
130  DF  MISCELLANEOUS