CA1171187A - Hook switch for a telephone instrument of single body type - Google Patents
Hook switch for a telephone instrument of single body typeInfo
- Publication number
- CA1171187A CA1171187A CA000396238A CA396238A CA1171187A CA 1171187 A CA1171187 A CA 1171187A CA 000396238 A CA000396238 A CA 000396238A CA 396238 A CA396238 A CA 396238A CA 1171187 A CA1171187 A CA 1171187A
- Authority
- CA
- Canada
- Prior art keywords
- rods
- rack
- hook switch
- rack member
- telephone instrument
- 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
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/04—Supports for telephone transmitters or receivers
- H04M1/06—Hooks; Cradles
- H04M1/08—Hooks; Cradles associated with switches operated by the weight of the receiver or hand-set
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Telephone Set Structure (AREA)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
- Transmission Devices (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A hook switch arrangement for a telephone instrument of the single body type comprises actuating means protruding through the bottom surface of the instrument to actuate the hook switch of the instrument by means of a support on which the instrument is placed after a call. The actuating means cooper-ate with elements actuating the springs of the hook switch. The elements comprising rods provided with arms to convert the move-ment of the actuating means to rotating movement and a spring actuated rack member engaging a pinion, which on rotation actuates the hook switch. The rods are provided with further arms which on rotation displace the rack member.
A hook switch arrangement for a telephone instrument of the single body type comprises actuating means protruding through the bottom surface of the instrument to actuate the hook switch of the instrument by means of a support on which the instrument is placed after a call. The actuating means cooper-ate with elements actuating the springs of the hook switch. The elements comprising rods provided with arms to convert the move-ment of the actuating means to rotating movement and a spring actuated rack member engaging a pinion, which on rotation actuates the hook switch. The rods are provided with further arms which on rotation displace the rack member.
Description
This invention relates to a -telephone ins-trument of the sin~le bo~y type, comprising actuating means protruding -through its bottom surface for actuating a hook switch by means of a support on which the instrument is placed after a call. The actuating means cornprises members distributed along the peri-phery oE the bottom surface, each member cooperating with elements actuating springs of the hook switch. By hook switch is meant the switch in the telephone instrument for holding the line to the exchange and thereby enabling a telephone conversation to take place.
Arrangements of the mentioned type are previously known, for example, from U.S. Patent No. 3,562,447, and are particularly effective when it is desired to guarantee a correct hook switch ~unction in the case of an uneven support.
The known arrangement comprising two longitudinally dis-placeable arms which through their displacement actuate a rotat-able contact element has the disadvantage that the force required to actuate the contact elements is relatively large at the begin-ning of their movement and smallest in the middle of -their movement when the contact element, consisting of a rotatable arm, is perpendicular to the direc-tion of the displaceable arms. In unfavourable cases, locking can occur such that the return spring cannot bring the contact element back to its rest position.
An object of the invention is to provide a hook switch function with an even and relatively low operating power. With the arrangement according to the invention easier adjustment, easier mounting, and elimination of the risk of self-locking is also achieved.
According -to the present invention there is provided in a telephone instrument of the single-body type having a hook switch and a bottom surface, an arrangement for actuating the hook switch compirsing displaceable members protruding from said bot-tom surface and arranged so as to be pushed into the instrument 3L~L7~
when it is placed on a support surface, rods provided with arms cooperating with said protruding members to convert the displace-ment of the protruding members into a rotary movement of said rods, a spring-biased rack member displaceable by further arms on said rods against the action of said spring when said rods are rotated, and a pinion engaging said rack member and actuating the hook switch when the rack member is displaced by at least one of said further arms.
The invention will now be described in more detail, by way of example only, with reference to the accompanying drawings, in which:-Figure 1 is an exploded view of a hook switch arrange-ment according to the invention; and Figure 2 is a side view of a rack-and-pinion forming part of the arrangement.
In Figure 1 only those parts of a telephone instrument : necessary to explain the idea of the invention have been shown, while other parts have been omitted.
The hook switch arrangemellt has a long actuating means ~ 10 and two shorter actuating means 11 and 12, which, in a tele-phone instrument of single-body type, for example, the telephone instrument EPRICOFON T~, protrude through the bottom surface of the instrument (not shown in the drawing) and are pushed into the instrument when it is placed on a support. They then actu-ate elements which in their turn actuate contact springs in the contact device of the instrument. The elements comprise rods 13,14, which are rotatable by the actuating means, and a rack arrangement 15, which is displaceable in the longi-tudinal . direction by the rotation of at least one of said rods. The 30 rack arrangement 15 has an adjustable rack ~ cooperating with a pinion 16 on the camshaft of a camshaft controlled relay 17.
Tlle rod 13 cooperates with the actuating means 10, and the rod 1 ~7~
cooperates with -the actuating means 11 and 12, with the aid of arms 20 which are turned when the respective actuating means is displaced vertically. The rods 13,14 are at one of their ends provided with a further arm 21, which on rota-tion of the rod dis-places the rack arrangement in the longitudinal direction against the force of a spring 18. The rods 13,14 are arranged in such a way that the rack arrangement 15 is actuated regardless of whether only one or all of the actuating means are depressed.
As appears from -the drawing, the arm 21 of the rod 13 is turned anti-clockwise when the actuating means 10 is pushed inwards and by means of the projection 22 displaces the rack arrangement against the force of the spring 18. If only one of the actuating means 11. or 12 is pushed inwards, the arm 21 on the rod 14 is turned clockwise and by means of the projection~23 displaces the rack arrangement against the force of -the spring 18.
Figure 2 shows the rack gear-device on a larger scale in side view. The rack 2~ is adjustable vertically as well as longitudinally rela-tive to the suppor-ting bar lS by means of two rotatable eccentric cams 25 and 26, which are provided with screwhead grooves or a hexayon head 27,28 and engaye oblong ho]es 29,30 in the rack 24. The hole 29 ex-tends in -the longi-tudinal direction of the rack, and the hole ~0 extends in the transversal direction. The eccentric cam 25 displaces the rack transversal-ly to adjust the clearance between the teeth, while the eccentric cam 26 displaces the rack longitudinally to adjust the first and the last contact position in the spring ~roup of the relay.
The fac-t that the holes are oblong makes it possible to ad]ust the eccentric cams independently of each other.
The adjustment of the rack enables the actuating means 10,11,12 to be pushed inwards a certain distance of about 1 mm before the first contact closing of -the spring group occurs providing protection against acciden-tal discollnection of tele-~7~37 phone conversations, and furthermore the actuating means to be pushed inwards further a certain distance of about 2 mm after the last contact disconnection providing security maryin for interruption of telephone conversations on replacement in case of an uneven support.
The advantage of described cons-truction compared with ~lown constructions, where the camshaft of the relay is actuated by a xotatable arm through a rod mechanism, is that the turning moment exerted on the camshaft of the relay does not vary dur-ing the rotating movement but is constant, and self-locking is prevented.
Arrangements of the mentioned type are previously known, for example, from U.S. Patent No. 3,562,447, and are particularly effective when it is desired to guarantee a correct hook switch ~unction in the case of an uneven support.
The known arrangement comprising two longitudinally dis-placeable arms which through their displacement actuate a rotat-able contact element has the disadvantage that the force required to actuate the contact elements is relatively large at the begin-ning of their movement and smallest in the middle of -their movement when the contact element, consisting of a rotatable arm, is perpendicular to the direc-tion of the displaceable arms. In unfavourable cases, locking can occur such that the return spring cannot bring the contact element back to its rest position.
An object of the invention is to provide a hook switch function with an even and relatively low operating power. With the arrangement according to the invention easier adjustment, easier mounting, and elimination of the risk of self-locking is also achieved.
According -to the present invention there is provided in a telephone instrument of the single-body type having a hook switch and a bottom surface, an arrangement for actuating the hook switch compirsing displaceable members protruding from said bot-tom surface and arranged so as to be pushed into the instrument 3L~L7~
when it is placed on a support surface, rods provided with arms cooperating with said protruding members to convert the displace-ment of the protruding members into a rotary movement of said rods, a spring-biased rack member displaceable by further arms on said rods against the action of said spring when said rods are rotated, and a pinion engaging said rack member and actuating the hook switch when the rack member is displaced by at least one of said further arms.
The invention will now be described in more detail, by way of example only, with reference to the accompanying drawings, in which:-Figure 1 is an exploded view of a hook switch arrange-ment according to the invention; and Figure 2 is a side view of a rack-and-pinion forming part of the arrangement.
In Figure 1 only those parts of a telephone instrument : necessary to explain the idea of the invention have been shown, while other parts have been omitted.
The hook switch arrangemellt has a long actuating means ~ 10 and two shorter actuating means 11 and 12, which, in a tele-phone instrument of single-body type, for example, the telephone instrument EPRICOFON T~, protrude through the bottom surface of the instrument (not shown in the drawing) and are pushed into the instrument when it is placed on a support. They then actu-ate elements which in their turn actuate contact springs in the contact device of the instrument. The elements comprise rods 13,14, which are rotatable by the actuating means, and a rack arrangement 15, which is displaceable in the longi-tudinal . direction by the rotation of at least one of said rods. The 30 rack arrangement 15 has an adjustable rack ~ cooperating with a pinion 16 on the camshaft of a camshaft controlled relay 17.
Tlle rod 13 cooperates with the actuating means 10, and the rod 1 ~7~
cooperates with -the actuating means 11 and 12, with the aid of arms 20 which are turned when the respective actuating means is displaced vertically. The rods 13,14 are at one of their ends provided with a further arm 21, which on rota-tion of the rod dis-places the rack arrangement in the longitudinal direction against the force of a spring 18. The rods 13,14 are arranged in such a way that the rack arrangement 15 is actuated regardless of whether only one or all of the actuating means are depressed.
As appears from -the drawing, the arm 21 of the rod 13 is turned anti-clockwise when the actuating means 10 is pushed inwards and by means of the projection 22 displaces the rack arrangement against the force of the spring 18. If only one of the actuating means 11. or 12 is pushed inwards, the arm 21 on the rod 14 is turned clockwise and by means of the projection~23 displaces the rack arrangement against the force of -the spring 18.
Figure 2 shows the rack gear-device on a larger scale in side view. The rack 2~ is adjustable vertically as well as longitudinally rela-tive to the suppor-ting bar lS by means of two rotatable eccentric cams 25 and 26, which are provided with screwhead grooves or a hexayon head 27,28 and engaye oblong ho]es 29,30 in the rack 24. The hole 29 ex-tends in -the longi-tudinal direction of the rack, and the hole ~0 extends in the transversal direction. The eccentric cam 25 displaces the rack transversal-ly to adjust the clearance between the teeth, while the eccentric cam 26 displaces the rack longitudinally to adjust the first and the last contact position in the spring ~roup of the relay.
The fac-t that the holes are oblong makes it possible to ad]ust the eccentric cams independently of each other.
The adjustment of the rack enables the actuating means 10,11,12 to be pushed inwards a certain distance of about 1 mm before the first contact closing of -the spring group occurs providing protection against acciden-tal discollnection of tele-~7~37 phone conversations, and furthermore the actuating means to be pushed inwards further a certain distance of about 2 mm after the last contact disconnection providing security maryin for interruption of telephone conversations on replacement in case of an uneven support.
The advantage of described cons-truction compared with ~lown constructions, where the camshaft of the relay is actuated by a xotatable arm through a rod mechanism, is that the turning moment exerted on the camshaft of the relay does not vary dur-ing the rotating movement but is constant, and self-locking is prevented.
Claims (4)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. In a telephone instrument of the single-body type having a hook switch and a bottom surface, an arrangement for ac-tuating the hook switch comprising displaceable members pro-truding from said bottom surface and arranged so as to be pushed into the instrument when it is placed on a support surface, rods provided with arms cooperating with said protruding members to convert the displacement of the protruding members into a rotary movement of said rods, a spring-biased rack member dis-placeable by further arms on said rods against -the action of said spring when said rods are rotated, and a pinion engaging said rack member and actuating the hook switch when the rack member is displaced by at least one of said further arms.
2. A telephone instrument according to claim 1, wherein the rack member comprises a support bar and a rack adjus-table relative to the support bar, said rack being located on the support bar by means of eccentric cams engaging oblong holes in the rack, whereby the rack is displaceable transversally and longitudinally on the support bar to enable the clearance be-tween the teeth of the rack and pinion, and contact operation of the switch to be adjusted.
3. A telephone instrument according to claim 1, compri-sing two said rods, are. at each end of said rack member, the further arm of each said rod cooperating with a respective abut-ment on the rack member, said further arms being on the same side of their respective abutments so that rotation of one of said rods displaces said rack member but does not cause rotation of the other of said rods.
4. A telephone instrument according to claim 3, compri-sing the rods are arranged so that depression of their associated protruding members causes them to rotate in opposite senses.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE8101116-5 | 1981-02-19 | ||
| SE8101116A SE425449B (en) | 1981-02-19 | 1981-02-19 | CLUTCH DEVICE FOR ONE-TYPE PHONE DEVICE |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1171187A true CA1171187A (en) | 1984-07-17 |
Family
ID=20343175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000396238A Expired CA1171187A (en) | 1981-02-19 | 1982-02-15 | Hook switch for a telephone instrument of single body type |
Country Status (9)
| Country | Link |
|---|---|
| EP (1) | EP0072813B1 (en) |
| CA (1) | CA1171187A (en) |
| DE (1) | DE3261491D1 (en) |
| DK (1) | DK462382A (en) |
| ES (1) | ES8302978A1 (en) |
| IT (1) | IT1153457B (en) |
| NO (1) | NO823411L (en) |
| SE (1) | SE425449B (en) |
| WO (1) | WO1982002989A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8401721D0 (en) * | 1984-01-23 | 1984-02-22 | British Telecomm | Switch operating mechanisms |
| DE3710130A1 (en) * | 1987-03-27 | 1988-10-13 | Standard Elektrik Lorenz Ag | HANDSET HOLDER FOR COIN SPEAKER |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3406263A (en) * | 1964-04-01 | 1968-10-15 | Int Standard Electric Corp | Telephone cradle switch arrangements |
| SE311380B (en) * | 1967-10-06 | 1969-06-09 | Ericsson Telefon Ab L M | |
| SE393016B (en) * | 1976-05-03 | 1977-04-25 | Ericsson Telefon Ab L M | CLOCK DEVICE FOR ONE-BODY TYPE TELEPHONE |
-
1981
- 1981-02-19 SE SE8101116A patent/SE425449B/en unknown
-
1982
- 1982-02-05 WO PCT/SE1982/000030 patent/WO1982002989A1/en not_active Application Discontinuation
- 1982-02-05 EP EP82900405A patent/EP0072813B1/en not_active Expired
- 1982-02-05 DE DE8282900405T patent/DE3261491D1/en not_active Expired
- 1982-02-15 CA CA000396238A patent/CA1171187A/en not_active Expired
- 1982-02-18 ES ES509709A patent/ES8302978A1/en not_active Expired
- 1982-02-19 IT IT19768/82A patent/IT1153457B/en active
- 1982-10-12 NO NO823411A patent/NO823411L/en unknown
- 1982-10-18 DK DK462382A patent/DK462382A/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| DK462382A (en) | 1982-10-18 |
| SE425449B (en) | 1982-09-27 |
| NO823411L (en) | 1982-10-12 |
| EP0072813B1 (en) | 1984-12-12 |
| SE8101116L (en) | 1982-08-20 |
| IT8219768A0 (en) | 1982-02-19 |
| ES509709A0 (en) | 1983-01-16 |
| EP0072813A1 (en) | 1983-03-02 |
| WO1982002989A1 (en) | 1982-09-02 |
| IT1153457B (en) | 1987-01-14 |
| DE3261491D1 (en) | 1985-01-24 |
| ES8302978A1 (en) | 1983-01-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEC | Expiry (correction) | ||
| MKEX | Expiry |