GB2207324A

GB2207324A - Telephone hook switch

Info

Publication number: GB2207324A
Application number: GB08716990A
Authority: GB
Inventors: Paul Raymond Vidler
Original assignee: STC PLC
Current assignee: STC PLC
Priority date: 1987-07-18
Filing date: 1987-07-18
Publication date: 1989-01-25
Anticipated expiration: 2007-07-18
Also published as: GB2207324B; GB8716990D0

Abstract

In a telephone (such as that of Registered Design No. 1033185), a hook switch operating lever (4) is L shaped with part projecting into a handset-receiving recess (1) along one side of the instrument. When the handset is on hook it pivots the lever (4) causing its other portions to operate the hook switch contacts via a plunger (7), which pokes out of a box (6) which accommodates the hook-switch contacts. <IMAGE>

Description

TELEPHONE HOOK SWITCH This invention relates to telephone subscribers" instruments, and especially to hook-swtch arrangements for use therein.

The arrangement to be described herein is similar in many respects to the arrangement detailed and claimed in our Application No. 8630895 (G. Willies 4), and is in fac an improvement thereon.

According to the invention, there is provided a telephone subscribers' instrument, which has a handset, part of whose length is of generally rectangular cross-section and which fits when in use into corresponding recess on the instrument's body, in which hook-switch contact means are operated in response to the movement of a pivoted lower end of which extends into said recess, in which the pivoted member is rocked about its pivot point when the handset is fitted into said recess, in which the pivoted lever has an angled end portion which extends into the instrument body, and in whIch the movement of said angled end portions when the pivoted lever is rocked operates one or more contacts.

An embodiment of the invention will now be described with reference to the accompanying drawings, in which: Fig. 1 is a cross-section of a telephone switch to that descrIbed in the above mentioned application.

Fig. 2 is a side view of the telephone with the handset in the on hook posItion.

Fig. 3 is a side view of the hook switch contact operating member used in the telephone of Figs. 1 and 2.

Fig. 4 is a view of the member of Fig. 3, looking in the directions of the arrow I,'Fig. 1.

Fig. 5 is a view of the member of Fig. 3, looking in the direction of the arrow II, Fig. 1.

Fig. 6 is a view of the member, looking in the direction of the arrow III, Fig. 4.

The telephone instrument to which the present invention is applied is a push-button set, although the invention is equally applicable to a dial set. The instrument has a rectangular body with a channel-like recess extending along on the side of the body. Its handset has a straight portion of generally rectangular cross-section which fits into the recess, and when it is in the recess it operates the hook-switch arrangement. Such an instrument is also illustrated in our Registered Design No. 1033185 (QTD8).

In Fig. 1 we see the instrument body sectioned, with the recess 1 to receive the handset at the left-hand side. At the bottor of the recess is an upstanding locating member 2, and the handset has a recess which fits over the member 2 when on-hook. Thus the handset is positively located in the recess.

The hook switch arrangement includes an L-shaped pivoted lever 4, pivoted near the mid point of its longer position at 5 to part of the upper surface of the instrument body. The hook switch contacts are in a small "low profile" box 6, which houses one or more contact sets to perform the hook-switch functions. These contacts are activated by a plunger 7, which projects from the box and bears on the cantilever portion of the lever 4. This plunger is under spring-urgence, and urges the lever clock-wise to the position shown in Fig. 1.

When the handset is on-hooked, its recess fits over the member 2, and the side of the handset acts on the lower end of the level 4, which as can be seen from Fig. 1, extends into the recess 1. This action rotates the level, so that its bent cantilever portion drives the plunger 7 upwards against the urgency of the spring contacts. This sets the hook-switch contact to the on-hook condition.

When the handset is removed from the recess 3, the plunger 7 moves downwards under spring urgence to set the lever 4 to its position shown in Fig. 1. This also sets the hook-switch contacts to the off-hook condition.

Fig. 2 is a side view of the instrument with the handset on-hook, looking across the body.

We now refer to Figs. 3 to 6, which show the constructional details of the lever 4. It has two cylindrical portions 10, 11 which fit into recesses on the instrument body to provide the pivots for the lever. At its lower position the lever has two resilient fingers 12, 13, which fit into recesses at the bottom of the recess 3 (Fig.

1). These fingers bias the lever to the position shown in Fig. 1.

Claims

1. A telephone subscribers' Instrument, which has a handset, part of whose length is of generally rectangular cross-section and which fits when in use into a corresponding recess on the instruent's body, in which hook-switch contact means are operated in response to the movement of a pivoted lever an end of which extends into said recess, in which the pivoted member is rocked about its pivot point when the handset is fitted into said recess, in which the pivoted lever has an angled end portion which extends into the instrument body, and in which the movement of said angled end portions which extends into the instrument body, and in which the movement of said angled end portions when the pivoted lever is rocked operates one or more contacts.

2. An instrument as claimed in claim 1, and in which the pivoted lever is L-shaped wIth the pivot point part way along the length of the upright of the L.

3. kn insrument as claimed in claim 1 and 2, and in which the hook switch contact means is a box which contains one or more micro-switch type contact sets.

4. An instrument as claimed in claim 2, or claim 3 as appended to claim 2, and in which the upright of the L is provided with one or more resIlIent fingers which fit into recesses of the instrument bocy.

5. A telephone subscribers' instrument substantially as described with reference to the accompanying drawings.

Amendments to the claims have been filed as follows 1. A telephone subscribers' instrument, which has a handset, part of whose length is of generally rectangular cross-section and which fits when in use into a corresponding recess on the instrument s body, in which hook-switch contact means are operated in response to the movement of a pivoted lever an end of which extends into said recess, in which the pivoted member is rocked about its pivot point when the handset is fitted into said recess, in which the pivoted lever has an angled end portion which extends into the instrument body, and in which the movement of said angled end portions whIch extends into the instrument body, and in which the movement of said angled end portions when the pivoted lever is rocked operates one or more contacts.

2. An instrument as claimed In claim 1, and in which the pivoted lever is L-shaped wit the pivot point part way along the length of the upright of the L.

3. kin Instrument as claimed in claim 1 and 2, and in which the hook switch contact means is a box which contains one or more micro-switch type contact sets.

4. An instrument as claimed in claim 2, or claim 3 as appended to claim 2, and in which the upright of the L is provided with one or more resilient fingers which fit into recesses of the instrument body.

5. A telephone subscribers' instrument substantially as described vith reference to the accompanying drawings.

6. A telephone subscribers' instrument, which has a handset part of whose length is straight and of substantially rectangular cross-section and which fits when in use into a corresponding recess which extends along a straight side of the instrument's body, in which hook switch contact means are operated in response to the movement of a pivoted lever mounted on the instrument body with an end portion extending into the recess, in which the pivoted lever is rocked about its pivot point by a flat side of the handset when the handset is fitted into said recess, in which said end portion of the pivoted lever has an angled portion which extends into the instrument body, and in which the movement of said angled portion when the pivoted lever is rocked operates said hook switch contact means.

7. An instrument as claimed in claim 6, in which the recess contains an upstanding locating member and the handset has a recess which fits over the locating member under the handset is in the recess.