US3557326A - Device for delaying the opening of the pulse contact for telephone dials - Google Patents
Device for delaying the opening of the pulse contact for telephone dials Download PDFInfo
- Publication number
- US3557326A US3557326A US770552A US77055268A US3557326A US 3557326 A US3557326 A US 3557326A US 770552 A US770552 A US 770552A US 77055268 A US77055268 A US 77055268A US 3557326 A US3557326 A US 3557326A
- Authority
- US
- United States
- Prior art keywords
- pulse train
- spring
- opening
- pulses
- cam
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/26—Devices for calling a subscriber
- H04M1/30—Devices which can set up and transmit only one digit at a time
- H04M1/31—Devices which can set up and transmit only one digit at a time by interrupting current to generate trains of pulses; by periodically opening and closing contacts to generate trains of pulses
- H04M1/34—Lost-motion or other arrangements for ensuring a pause between successive digit transmissions
Definitions
- a telephone dialing mechanism is provided to produce a delay of two pulses duration before the beginning of the dial pulse train.
- the present invention relates to a device for providing an initial delay in opening the pulse contact opening in telephone dialling discs. It relates more particularly to an improvement on prior art methods for effecting an idle run of said telephone dialling discs before sending out the pulse train.
- a preferred embodiment of this invention consists of a mechanism causing an idle run of telephone dialling discs, in which the operation of an electric contact gives rise to pulse emission.
- the idle run, before the pulse train, is effected due to the fact that the pulse fork is frictionally rotated from a single lobe cam and through a rest are corresponding approximately to one pulse period, before the drive fork attains the position preceding the start of the pulses.
- FIG. 1 shows the starting position (with dialling disc loaded) of portions A. B, C, D, E of the device according to the invention
- FIGS. 2, 3, 4 and 5 show the positions of portions A, B, C, D and E of the device of FIG. 1 during the next movement;
- FIG. 6 shows the final position of the device.
- FIG. 1 the positions of portions A, B, C, D an E of the device are shown when the dialling disc is loaded in its starting position. After releasing the dialling disc (not shown),
- cam B begins to rotate clockwise dragging along fork C.
- the cam B continues rotating until the extension D of l'ork C comes to bear against the short spring of contact A. This causes the fork C to stop (FIG. 2
- cam B by continuing to rotate causes the movcment of two springs of contact A with the aid of tongue E of the short spring and this results in a clearing ofextension D.
- the opening of the contact A which opening is the desired position, is caused by further rotation of the eccentric cam B, to given rise to the first pulse of the pulse train.
- cam B has performed two rotations corresponding to an arc of two idle pulses, which appear before the beginning ofthe pulse train.
- a mechanism wherein the improvement comprises a fork having two extensions applied by an eccentric cam and two contact carrying springs, one of which is a short spring having a tongue bearing against the rotating eccentric cam and the other spring is a long spring, said short spring and said long spring being separated after two revolutions of said cam.
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Telephone Set Structure (AREA)
- Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
- Interface Circuits In Exchanges (AREA)
Abstract
A telephone dialing mechanism is provided to produce a delay of two pulses duration before the beginning of the dial pulse train.
Description
United States Patent [54] DEVlCE FOR DELAYlNG THE OPENING OF THE PULSE CONTACT FOR TELEPHONE DlALS 2 Claims, 6 Drawing Figs. 1
[52] US. Cl. 200/33,
[5 l] Int. Cl 1-10lh 43/00 [50] Field of Search 200/33, 1 33.2; 179/90 [56] References Cited UNITED STATES PATENTS 2,963,554 12/1960 Hershey 179/90 3,301,966 1/1967 Bekaert 179/90 Primary Examiner-H. 0. Jones AttorneysC. Cornell Remsen, Jr., Walter J. Baum, Rayson P.
Morris, Percy P. Lantzy. J. Warren Whitesel and Delbert P. Warner ABSTRACT: A telephone dialing mechanism is provided to produce a delay of two pulses duration before the beginning of the dial pulse train.
PATENTEDJAM slsn 3.657.326 SHE-ET IN 2 WWW A Home y DEVICE FOR DELAYING THE OPENING OF THE PULSE CONTACT FOR TELEPHONE DIALS The present invention relates to a device for providing an initial delay in opening the pulse contact opening in telephone dialling discs. It relates more particularly to an improvement on prior art methods for effecting an idle run of said telephone dialling discs before sending out the pulse train.
A preferred embodiment of this invention consists of a mechanism causing an idle run of telephone dialling discs, in which the operation of an electric contact gives rise to pulse emission.
In known dialling discs of the above type, the idle run, before the pulse train, is effected due to the fact that the pulse fork is frictionally rotated from a single lobe cam and through a rest are corresponding approximately to one pulse period, before the drive fork attains the position preceding the start of the pulses. g
In other prior art dialling discs of this general type a rest corresponding to one pulse period has been provided by an arc corresponding to two pulses, one of which occurs before the emission of the pulse train and the other after the emission of the pulse train. In the present invention. by way of contrast, it is our object to provide two idle pulses before the emission of the pulse train.
Novel features and the advantages of the present invention will become more evident from the following description of an exemplary embodiment considered in conjunction with the accompanying drawings; in which:
FIG. 1 shows the starting position (with dialling disc loaded) of portions A. B, C, D, E of the device according to the invention;
FIGS. 2, 3, 4 and 5 show the positions of portions A, B, C, D and E of the device of FIG. 1 during the next movement; and
FIG. 6 shows the final position of the device.
Referring to FIG. 1 the positions of portions A, B, C, D an E of the device are shown when the dialling disc is loaded in its starting position. After releasing the dialling disc (not shown),
cam B begins to rotate clockwise dragging along fork C. The cam B continues rotating until the extension D of l'ork C comes to bear against the short spring of contact A. This causes the fork C to stop (FIG. 2
In FIG. 3, cam B by continuing to rotate causes the movcment of two springs of contact A with the aid of tongue E of the short spring and this results in a clearing ofextension D.
In FIG. 4, fork C during its further rotation, is stopped by the long spring of contact A. In the next step of rotation as shown in FIG. 5. it happens that cam B. through further rotation in contact with tongue E, causes the movement of both springs of contact A and it follows that fork C passes from a position bearing against the long spring to a position bearing against the short spring.
Finally with reference to FIG. 6, it is to be noted the opening of the contact A, which opening is the desired position, is caused by further rotation of the eccentric cam B, to given rise to the first pulse of the pulse train.
As is evident from the foregoing specification, cam B has performed two rotations corresponding to an arc of two idle pulses, which appear before the beginning ofthe pulse train.
It is to be understood that the foregoing description of a specific embodiment of the invention has been given only by way of example and it is not to be considered as a limitation on the scope of the invention.
We claim:
1. In a telephone dialing disc for producing an idle run corresponding to two pulses before emission of a pulse train, a mechanism wherein the improvement comprises a fork having two extensions applied by an eccentric cam and two contact carrying springs, one of which is a short spring having a tongue bearing against the rotating eccentric cam and the other spring is a long spring, said short spring and said long spring being separated after two revolutions of said cam.
2. A telephone dialing disc as claimed in claim 1, in which the mechanism causes the delayed emission of the pulse train after a delay corresponding to two pulses, the latter occurring before the beginning of the pulse train.
Claims (2)
1. In a telephone dialing disc for producing an idle run corresponding to two pulses before emission of a pulse train, a mechanism wherein the improvement comprises a fork having two extensions applied by an eccentric cam and two contact carrying springs, one of which is a short spring having a tongue bearing against the rotating eccentric cam and the other spring is a long spring, said short spring and said long spring being separated after two revolutions of said cam.
2. A telephone dialing disc as claimed in claim 1, in which the mechanism causes the delayed emission of the pulse train after a delay corresponding to two pulses, the latter occurring before the beginning of the pulse train.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT2197467 | 1967-10-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3557326A true US3557326A (en) | 1971-01-19 |
Family
ID=11189612
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US770552A Expired - Lifetime US3557326A (en) | 1967-10-25 | 1968-10-25 | Device for delaying the opening of the pulse contact for telephone dials |
Country Status (8)
Country | Link |
---|---|
US (1) | US3557326A (en) |
JP (1) | JPS4828565B1 (en) |
BE (1) | BE722865A (en) |
DE (1) | DE6802970U (en) |
ES (1) | ES359452A1 (en) |
FR (1) | FR1585384A (en) |
GB (1) | GB1239038A (en) |
NL (1) | NL6815262A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3919494A (en) * | 1973-01-11 | 1975-11-11 | Int Standard Electric Corp | Pulse contact delaying mechanism for telephone dials |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2963554A (en) * | 1959-08-06 | 1960-12-06 | Bell Telephone Labor Inc | Call transmitter |
US3301966A (en) * | 1962-09-12 | 1967-01-31 | Int Standard Electric Corp | Call transmitter |
-
1968
- 1968-10-08 JP JP43072904A patent/JPS4828565B1/ja active Pending
- 1968-10-09 DE DE6802970U patent/DE6802970U/en not_active Expired
- 1968-10-16 GB GB4900568A patent/GB1239038A/en not_active Expired
- 1968-10-23 ES ES359452A patent/ES359452A1/en not_active Expired
- 1968-10-25 US US770552A patent/US3557326A/en not_active Expired - Lifetime
- 1968-10-25 FR FR171331A patent/FR1585384A/fr not_active Expired
- 1968-10-25 NL NL6815262A patent/NL6815262A/xx unknown
- 1968-10-25 BE BE722865A patent/BE722865A/xx unknown
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2963554A (en) * | 1959-08-06 | 1960-12-06 | Bell Telephone Labor Inc | Call transmitter |
US3301966A (en) * | 1962-09-12 | 1967-01-31 | Int Standard Electric Corp | Call transmitter |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3919494A (en) * | 1973-01-11 | 1975-11-11 | Int Standard Electric Corp | Pulse contact delaying mechanism for telephone dials |
Also Published As
Publication number | Publication date |
---|---|
DE6802970U (en) | 1969-09-17 |
BE722865A (en) | 1969-04-25 |
JPS4828565B1 (en) | 1973-09-03 |
GB1239038A (en) | 1971-07-14 |
FR1585384A (en) | 1970-01-16 |
NL6815262A (en) | 1969-04-29 |
ES359452A1 (en) | 1970-06-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: ALCATEL N.V., DE LAIRESSESTRAAT 153, 1075 HK AMSTE Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:INTERNATIONAL STANDARD ELECTRIC CORPORATION, A CORP OF DE;REEL/FRAME:004718/0023 Effective date: 19870311 |