US3792205A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hand held telephone test instrument
Assignee: CMC TELECOM Corp
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Filing: 1971-06-01
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Granted: 1974-02-12
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Expires: 1991-06-01
Abstract
Abstract A hand held telephone test instrument, which is in the general form of a telephone hand set and embodies circuit and mechanical components for performing the usual hand set functions of dial, talk and monitor, but which utilizes such components in novel combination with additional circuit and mechanical components for selectively performing comprehensive functional tests on telephone switching equipment of both the dial and ''''TouchTone'''' types, which testing has conventionally required the use of a separate complete ''''Touch-Tone'''' telephone as well as additional test sets which are complex, expensive and much too bulky to be carried by a telephone testman.
Inventors
- 👤 Dea O O
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:16
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/24
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
191 words
A hand held telephone test instrument which comprises: a. an elongated housing having upper and lower end portions and an intermediate handle portion, and having front and rear sides, b. receiver and transmitter components in the respective said upper and lower portions and accessible at the front side of the housing, c. dial signaling means in the housing having a rotary dial in said upper portion accessible at the rear side of the housing, and ''''Touch-Tone'''' signaling means in said intermediate handle portion of the housing and having a push-button keyboard accessible at the front side of the housing intermediate said transmitter and receiver components, d. said handle portion having a generally unobstructed holding surface on the rear side thereof adapted to be engaged in the hand of a user, e. first and second input conductors adapted for connection to the respective conductors of a telephone line, f. circuit means operatively connecting said receiver, transmitter, rotary dial signaling means and ''''Touch-Tone'''' signaling means to said input conductors, and g. a multiple position function switch means in the housing for selecting a plurality of test functions to be performed by the instrument.
Claim 2
Dependent Claim
191 words
A hand held telephone test instrument which comprises: a. an elongated housing having upper and lower end portions and an intermediate handle portion, and having front and rear sides, b. receiver and transmitter components in the respective said upper and lower portions and accessible at the front side of the housing, c. dial signaling means in the housing having a rotary dial in said upper portion accessible at the rear side of the housing, and ''''Touch-Tone'''' signaling means in said intermediate handle portion of the housing and having a push-button keyboard accessible at the front side of the housing intermediate said transmitter and receiver components, d. said handle portion having a generally unobstructed holding surface on the rear side thereof adapted to be engaged in the hand of a user, e. first and second input conductors adapted for connection to the respective conductors of a telephone line, f. circuit means operatively connecting said receiver, transmitter, rotary dial signaling means and ''''Touch-Tone'''' signaling means to said input conductors, and g. a multiple position function switch means in the housing for selecting a plurality of test functions to be performed by the instrument.
Claim 3
Dependent Claim
32 words
A hand held telephone test instrument as defined in claim 1, wherein performed by the instrument, said function switch means having a manipulative portion accessible at said upper portion of the housing.
Claim 4
Dependent Claim
101 words
A hand held telephone test instrument as defined in claim 1, which includes second switch means in the housing alternatively operable from a neutral position to a first operative position to open a telephone line and to a second operative position to connect said transmitter to a telephone line, said second switch means having a manipulative portion accessible at said upper portion of the housing adjacent to said handle portion intermediate said front and rear sides of the housing for actuation of such manipulative portion by a finger of a hand of a user in which said holding surface is engaged.
Claim 5
Dependent Claim
64 words
A hand held telephone test instrument as defined in claim 1, wherein said circuit means includes a series circuit connection of said rotary dial and ''''Touch-Tone'''' signaling means, each of said signaling means including normally closed contact means in said series circuit connector which remains closed while the other signaling means is being operated, whereby said dial and ''''Touch-Tone'''' signaling means are selectively operable.
Claim 6
Dependent Claim
40 words
A hand held telephone test instrument as defined in claim 1, which includes monitor amplifier means having an output operatively connected to said receiver and a high impedance input selectively operatively connectable by said circuit means across said input conductors.
Claim 7
Dependent Claim
24 words
A hand held telephone test instrument as defined in claim 5, wherein said monitor amplifier means has selectively connectable normal and high gain portions.
Claim 8
Dependent Claim
41 words
A hand held telephone test instrument as defined in claim 1, which includes trace tone oscillator means having an output providIng an audible trace tone signal selectively operatively connectable by said circuit means to at least one of said input conductors.
Claim 9
Dependent Claim
28 words
A hand held telephone test instrument as defined in claim 1, which includes leak test circuit component means selectively operatively connectable by said circuit means across said conductors.
Claim 10
Dependent Claim
33 words
A hand held telephone test instrument as defined in claim 8, wherein said leak test circuit component means comprises a parallel combination of a resistor and pulse contacts of said dial signaling means.
Claim 11
Dependent Claim
29 words
A hand held telephone test instrument as defined in claim 1, which includes loop test circuit component means selectively operatively connectable across said input conductors by said circuit means.
Claim 12
Dependent Claim
33 words
A hand held telephone test instrument as defined in claim 10, wherein said loop test circuit component means comprises a series combination of a resistor and pulse contacts of said dial signaling means.
Claim 13
Dependent Claim
75 words
A hand held telephone test instrument as defined in claim 1, which includes a parallel combination of a pair of oppositely directed diodes in at least one of said input conductors, one of which diodes is a light emitting diode, said diodes being so arranged that current will pass through and illuminate said light emitting diode upon a reversal from normal telephone line polarity, current passing through the other said diode with normal line polarity.
Claim 14
Dependent Claim
136 words
A hand held telephone test instrument as defined in claim 1, which includes monitor amplifier means having an output operatively connected to said receiver and a high impedance input selectively operatively connectable by said circuit means across said input conductors, trace tone oscillator means having an input providing an audible trace tone signal selectively operatively connectable by said circuit means to at least one of said input conductors, leak test circuit component means selectively operatively connectable by said circuit means across said input conductors, loop test circuit component means selectively operatively connectable by said circuit means across said input conductors, and diode bridge polarization network means in said circuit means assuring constant electrical polarity to said ''''Touch-Tone'''' signaling means, said monitor amplifier means and said trace tone oscillator means regardless of reversals in telephone line polarity.
Claim 15
Dependent Claim
73 words
A hand held telephone test instrument as defined in claim 1, wherein said circuit means includes function selector switch means selectively movable to positions for monitoring audio signals with said monitor amplifier, alternative signaling with said rotary dial and ''''Touch-Tone'''' signaling means, performing a leak test with said leak test circuit component means, performing a loop test with said loop test circuit component means, and circuit tracing with said trace tone oscillator means.
Claim 16
Dependent Claim
36 words
A hand held telephone test instrument as defined in claim 14, which includes normally closed release switch means in at least one of said input conductors adapted to be momentarily opened to release a telephone line.
Claim 17
Dependent Claim
32 words
A hand held telephone test instrument as defined in claim 14, which includes normally open talk switch means in said circuit means selectively closable to connect said transmitter with said input conductors.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |