"Compact" Style Telephone

This instrument has been specially designed to embody all the latest features and improvements in as neat and compact a form as possible, and possesses many distinctive points which will doubtless commend themselves to the purchaser. For general appearance and equipment, kindly refer to Figs. 1 and 2. The Cabinet is strongly made of carefully selected, well-seasoned kiln dried oak in one uniform size only, and will accommodate any of the specified equipments mentioned hereafter. Four distance pieces are firmly secured to the corners at the rear of the Backboard, which prevents moisture affecting the Cabinet should the set happen to be mounted on a damp wall.

Polished Oak Cabinet with capacity for two dry cells
Showing simplicity of wiring and complete accessibility

The front of the telephone is very substantially hinged and locked in position by a machine screw and bracket, while a suitable writing shelf is also provided for memoranda purposes. On opening the front, the whole of the working parts and wiring are exposed to view, and this ready accessibility for inspection or other purposes will make a strong appeal to the practical engineer. The wiring is of the simplest possible description, and all salient features will be easily followed and understood by a glance at Fig. 2, which shows the set with the front thrown back. The Apparatus employed is of our standard high-grade manufacture, and that attached to the front is wired to separate connection hinges which furnishes an excellent example of employing simple means to avoid any possibility of the set getting out of order. Line terminals of sound design and ample clamping surface are arranged on the top of the Cabinet, while binding posts are provided for connecting the necessary dry cells to the local transmitter circuit.

The Generator, which is the heaviest item of the equipment, is securely bolted by four machine screws to the shelf, which is strongly trenched into the sides of the Cabinet.

In concluding our brief description of the "Compact" Telephone, we would call attention to its special adapt-ability for shipment. Fig. 3 shows set ready for packing, and all parts which have been removed are stowed away in the lower portion of the Cabinet, where the cells will be located. This effects a great saving in space, and undoubtedly protects the apparatus from injury during transit. The dimensions of this Telephone are shown on Fig. 4.

We can supply this style of telephone with any of the equipments given in the table, wired to the circuits described below, and illustrated in figures 5 to 10.

Full particulars for ordering will be found in the schedule outlined in the table.

Fig. 3
View showing Instrument dismantled and ready for shipment.
Fig. 4

This is shown in Fig. 5 and is too well known to need a lengthy description; it is equipped with our C104B Hook Switch, C103 Generator, and C101A Ringer, the rest of the apparatus being similar to the Bridging equipments. These instruments work efficiently in pairs and as a single subscriber's station from an exchange, but it is better to employ a Bridging Set when it becomes necessary to install a number of Telephones on one line.

Three standard equipments are fitted with this circuit (Fig. 6), the apparatus varying with the conditions under which the instruments are to work.
C103 3-Magnet Generator & C100A 1000 ohm Ringer.
C100 4-Magnet Generator & C100A 1000 ohm Ringer.
C101 5-Magnet Generator & C100C 1600 ohm Ringer.

The first equipment is suitable for use on short bridging lines where a few stations only are required, and we do not advocate the use of more than 8 of these sets on any one line of average length.

The second equipment with 4-Magnet Generator will be found to meet all the requirements on a party line, where the number of telephones bridged does not exceed twelve, and where the line is of moderate length.

For all conditions above these where the most powerful Generator and sensitive ringer is required, we would recommend the 5-Bar Generator and 1600 ohm ringer; these will be found to give excellent service with any number of subscribers up to thirty - or even beyond that number - bridged on a long distance line, and we have no a hesitation in stating that this equipment is the most powerful that can be obtained. Efficient service will be given under the most severe conditions found in party-line working.

Bridging - Silent Ringing
In the circuits described above and shown in Fig. 6, the subscriber rings his own bell while turning his Generator. If, however, it is desired to make this bell silent on calling out, the Telephone can be wired to Fig. 7. We can supply stock instruments wired to this circuit, as specified in the appended code; but if the customer wishes to effect the change from the standard bridging circuit, this can be done - without any additional wiring - by simply moving over a generator connection.

Bridging - Sure Ring
Trouble is occasionally caused on lines to which a large number of telephones are bridged by subscribers failing to hang up their Receivers after they have finished talking ; when this occurs, the shunt circuit formed by the receiver and secondary winding of the induction coil is sufficiently low to interfere with the proper signalling. To remedy this defect, a Condenser of low capacity is placed in the receiver circuit (see Fig. 8), and while this leaves the speaking circuit practically unaffected, it offers sufficiently high impedence to the ringing current to allow of good signalling even if the majority of the receivers are left off their hooks.

The C 103 Condenser has been specially designed for use with this circuit, and is of 0.5 MF capacity, of small size and neat appearance. The wiring of all our " Compact " type Telephones is arranged for the addition of these Condensers, and they can be fitted at any future time with the greatest of ease (see Fig. 2), should it be found desirable, by cutting the wires which run to the bottom Hinge and connecting the Condenser in series therewith. The Condenser is fixed to the door by a special clip designed for the purpose, which can be supplied at a minimum outlay.

Our Nos. 405, 505 and 507 sets are equipped with this Condenser.

Bridging - Push Button
This circuit has been designed for Telephones used on exchange lines, where it is desirable that intercommunication may take place between the subscribers without signalling the exchange; it also permits the exchange to be called without ringing the bells of other sets on the line.

This is our standard bridging circuit, with the addition of a push button key, and its operation is as follows:-
The line drop at the exchange is connected between L1 and earth, and will only operate when the Generator is turned and key depressed; the bells at the other sets will not ring, as they are bridged across the two lines and have no earth connections; the result of operating the Generator without depressing key (which is fitted on the left-hand side of the Cabinet) is to ring the other instruments on the same line without signalling the exchange.

The talking circuit is full metallic, and the earth is only on when signalling the exchange.

Our No. 506 set is equipped with this circuit which is shown in Fig. 9, while all the "Compact" type sets are wired so that the key can be readily added at any time if desired.

Bridging - Push Button, Sure Ring
Fig. 10 is a combination of the circuits shown in Figs. 8 and 9, and is used on our No. 507 set. All Bridging " Compact " type sets are wired so as to be convertible to this circuit if desired.

"Compact" Style Telephone - Schedule for Ordering table

Code No. Circuit Generator Ringer Hook Switch Code No. Approx Weight without batteries
Type Code No. Resistance Code No. Lbs. Ozs.
300 Series 3-Magnet C103 100 C101A C104B 16 8
303 Bridging 3-Magnet C103 1000 C100A C100B 16 8
304 Bridging, Silent Ring 3-Magnet C103 1000 C100A C100B 16 8
403 Bridging 4-Magnet C100 1000 C100A C100B 18 -
404 Bridging, Silent Ring 4-Magnet C100 1000 C100A C100B 18 -
405 Bridging, Sure Ring 4-Magnet C100 1000 C100A C100B 18 4
503 Bridging 5-Magnet C101 1600 C100C C100B 19 -
504 Bridging, Silent Ring 5-Magnet C101 1600 C100C C100B 19 -
505 Bridging, Sure Ring 5-Magnet C101 1600 C100C C100B 19 4
506 Bridging - Push Button 5-Magnet C101 1600 C100C C100B 19 4
507 Bridging - Push Button 5-Magnet C101 1600 C100C C100B 19 8

Cells are not included in any of the above equipments

Taken from the Peel Conner Telephone Works Ltd Bulletin No. 1 - dated 1910

See also the GEC K8056

See also the Magneto Telephone description

Telephone Parts

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Last revised: January 24, 2011