US4582965A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coin trunk test set
Assignee: Frontier Florida LLC
•
Filing: 1984-08-23
•
Granted: 1986-04-15
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Expires: 2004-08-23
Abstract
Abstract A test set which tests coin trunk circuits for both normal and abnormal operations. A pair of light-emitting diodes monitor battery feed and reverse current. A first set of switch contacts simulate coin deposit while a second set of switch contacts connect fault, re-ring, coin deposit and coin return monitoring lamps and circuit paths to the coin trunk circuit.
Inventors
- 👤 Robert W. Lembke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:17
CPC Classifications
H; H04; H04M; H04M3/00; H04M3/22; H04M3/24; H04M3/248
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
327 words
A coin trunk test set for use with a hand test telephone having first and second terminals, and central office coin circuits including a battery feed source, a reverse battery source, a ringing generator, and a coin trunk circuit having first and second terminals, said coin trunk test set comprising: first sensible indicating means connected between the first terminal of said coin trunk circuit and the first terminal of said hand test telephone; the second terminal of said hand test telephone being connected to said second terminal of said coin trunk circuit; said first sensible indicating means being operative in response to connection of said battery feed source to said coin trunk circuit to provide a path for battery feed current, said first sensible indicating means being operative in response to said battery feed current to provide a steady first sensible signal of a first characteristic; said first sensible indicating means being further operative in response to connection of said reverse battery source to said coin trunk circuit to provide a path for reverse battery current, said first sensible indicating means being operative in response to said reverse battery current to provide a steady first sensible signal of a second characteristic; said sensible indicating means connected to said first terminal of said hand test telephone; and first switching means connected between said second sensible indicating means and ground; said first switching means being operative to electrically connect said second sensible indicating means to ground; said second sensible indicating means being operative in response to connection of said ringing generator to said coin trunk circuit to provide a path for ringing current, said second sensible indicating means being operative in response to said ringing current to provide a periodic second sensible signal; said first sensible indicating means being also operative to provide a path for said ringing current and being operative in response to said ringing current to provide periodic first sensible signals of first and second characteristics.
Claim 2
Dependent Claim
327 words
A coin trunk test set for use with a hand test telephone having first and second terminals, and central office coin circuits including a battery feed source, a reverse battery source, a ringing generator, and a coin trunk circuit having first and second terminals, said coin trunk test set comprising: first sensible indicating means connected between the first terminal of said coin trunk circuit and the first terminal of said hand test telephone; the second terminal of said hand test telephone being connected to said second terminal of said coin trunk circuit; said first sensible indicating means being operative in response to connection of said battery feed source to said coin trunk circuit to provide a path for battery feed current, said first sensible indicating means being operative in response to said battery feed current to provide a steady first sensible signal of a first characteristic; said first sensible indicating means being further operative in response to connection of said reverse battery source to said coin trunk circuit to provide a path for reverse battery current, said first sensible indicating means being operative in response to said reverse battery current to provide a steady first sensible signal of a second characteristic; said sensible indicating means connected to said first terminal of said hand test telephone; and first switching means connected between said second sensible indicating means and ground; said first switching means being operative to electrically connect said second sensible indicating means to ground; said second sensible indicating means being operative in response to connection of said ringing generator to said coin trunk circuit to provide a path for ringing current, said second sensible indicating means being operative in response to said ringing current to provide a periodic second sensible signal; said first sensible indicating means being also operative to provide a path for said ringing current and being operative in response to said ringing current to provide periodic first sensible signals of first and second characteristics.
Claim 3
Dependent Claim
106 words
A coin trunk test set as claimed in claim 1, wherein said central office coin circuits further include a coin collect power supply: said first and second sensible indicating means being operative in response to connection of said coin collect power supply to said coin trunk circuit in a second arrangement to provide a path for coin collect current; said first sensible indicating means being operative in response to said coin collect current to provide said steady first sensible signal of a second characteristic, and said second sensible indicting means being operative in response to said coin collect current to provide a steady second sensible signal.
Claim 4
Dependent Claim
106 words
A coin trunk test set as claimed in claim 1, wherein said central office coin circuits further include a coin return power supply: said first and second sensible indicating means being operative in response to connection of said coin return power supply to said coin trunk circuit in a second arrangement to provide a path for coin return current; said first sensible indicating means being operative in response to said coin return current to provide said steady first sensible signal of a first characteristic, and said second sensible indicating means being operative in response to said coin return current to provide said steady second sensible signal.
Claim 5
Dependent Claim
24 words
A coin trunk test set as claimed in claim 1, wherein said second sensible indicating means comprises a voltage threshhold detecting visual indicating device.
Claim 6
Dependent Claim
22 words
A coin trunk test set as claimed in claim 4, wherein said voltage threshhold detecting visual indicating device comprises a neon lamp.
Claim 7
Dependent Claim
54 words
A coin trunk test set as claimed in claim 1, wherein there is further included, second switching means connected between said second terminal of said hand test telephone and ground; said second switching means being operative to electrically connect said second terminal of said hand test telephone and said coin trunk circuit to ground.
Claim 8
Dependent Claim
32 words
A coin trunk test set as claimed in claim 6, wherein there is further included a resistor connected between said second switching means and said second terminal of said hand test telephone.
Claim 9
Dependent Claim
120 words
A coin trunk test set as claimed in claim 1, wherein said central office coin circuits further include a coin collect power supply, said coin trunk test set further comprising: third sensible indicating means connected between said second terminal of said hand test telephone and said first switching means, said first switching means being further operative to connect said third sensible indicating means to ground; said third sensible indicating means being further operative in response to connection of said coin collect power supply to said coin trunk circuit in a first arrangement to provide a path for coin collect current, said third sensible indicating means being operative in response to said coin collect current to provide a third sensible signal.
Claim 10
Dependent Claim
25 words
A coin trunk test set as claimed in claim 8, wherein said third sensible indicating means comprises a unidirectional voltage threshhold detecting visual indicating device.
Claim 11
Dependent Claim
29 words
A coin trunk test set as claimed in claim 9, wherein said unidirectional voltage threshhold detecting visual indicating device comprises a neon lamp connected in series with a diode.
Claim 12
Dependent Claim
121 words
A coin trunk test set as claimed in claim 1, wherein said central office coin circuits further include a coin return power supply, said coin trunk test set further comprising: fourth sensible indicating means connected between said second terminal of said hand test telephone and said first switching means, said first switching means being further operative to connect said fourth sensible indicating means to ground; said fourth sensible indicating means being further operative in response to connection of said coin return power supply to said coin trunk circuit in a first arrangement to provide a path for said coin return current, said fourth sensible indicating means being operative in response to said coin return current to provide a fourth sensible signal.
Claim 13
Dependent Claim
24 words
A coin trunk test as claimed in claim 11, wherein said fourth sensible indicating means comprises a unidirectional voltage threshhold detecting visual indicating device.
Claim 14
Dependent Claim
29 words
A coin trunk test set as claimed in claim 12, wherein said unidirectional voltage threshhold detecting visual indicating device comprises a neon lamp connected in series with a diode.
Claim 15
Dependent Claim
28 words
A coin trunk test set as claimed in claim 1, wherein said first sensible indicating means comprises a pair of parallel and oppositely poled unidirectional visual indicating devices.
Claim 16
Dependent Claim
22 words
A coin trunk test set as claimed in claim 14, wherein each of said visual indicating devices comprises a light emitting diode.
Claim 17
Dependent Claim
33 words
A coin trunk test set as claimed in claim 1, wherein there is further included a resistor connected between said first sensible indicating means and said first terminal of said coin trunk circuit.
Claim 18
Dependent Claim
32 words
A coin trunk test set as claimed in claim 1, wherein there is further included a thermistor connected between said second terminal of said hand test telephone and said coin trunk circuit.
Claim 19
Dependent Claim
32 words
A coin trunk test set as claimed in claim 1, wherein there is further included a resistor connected between said second terminal of said hand test telephone and said coin trunk circuit.
References Cited (Backward Citations)
US4022987A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-04-14 | 1989-10-14 | 1990-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-14 | 1993-10-14 | 1994-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-14 | 1997-10-14 | 1998-04-15 | $7700.00 | Window Closed / Lapsed |