GEC MAGNETO TELEPHONES

K 8098
Mining telephone that is flameproof and waterproof.

Cast iron case with 1 inch flanges weighed 80 pounds (36.3Kg).
Made by Peel-Conner.
Fitted with solid back transmitter, induction coil, ringer, generator (300 ohm), bell receiver on flexible swinging arm (operates switch hooks) and 2 dry cells.

Cost in 1928 was £18.18.0

All the following telephones have Oxidised external metal work and cabinet work of polished Walnut.

K 8005
Wall pattern telephone with generator, double pole receiver, induction coil, Hunningscone-Deckert transmitter, 300 ohm bell and automatic switch hooks.

Oxidised external metal work and cabinet work of polished Walnut.

Picture shows the 1928 model.  The 1935 model had the terminals fitted inside the casing.

Cost in 1928 was £5.8.0.
Cost in 1935 was £5.8.0

K 8025
Wall pattern telephone, of Peel Conner manufacture, with three magnet generator, solid back transmitter, double pole "Bell" receiver, 1000 ohm bell, induction coil and automatic switch hooks.

Oxidised external metal work and cabinet work of polished Walnut.

Picture shows the 1928 model.  The 1935 model had the terminals fitted inside the casing.

Cost in 1928 was £7.12.6

K 8030
As K 8025 but with a four magnet generator.

Cost in 1935 was £7.17.6

K 8035
As K 8025 but fitted with a handset.

Cost in 1935 was £8.7.6

K 8055
Wall pattern Magneto telephone with three magnet generator, double pole receiver, solid back transmitter and polarised bell wound to 1000 ohms.

Oxidised external metal work and cabinet work of polished Walnut.

Weight 18 pounds

Cost in 1935 was £8.0.0

K 8056
Wall pattern telephone, similar to K 8055, but fitted with four magnet generator. Telephone also consists of double pole "Bell" receiver solid back long distance speaking transmitter, induction coil, 1000 ohm ringer automatic switch hooks and accommodation for 2 dry cells.

Oxidised external metal work and cabinet work of polished Walnut.

Cost in 1928 was £8.8.0
Cost in 1935 was £8.8.0

K 8056A was also available fitted with a three magnet generator.

K 8057
Similar to K 8055 but with five magnet generator.

Cost in 1935 was £8.18.0

K 8058
Table pattern telephone fitted with solid back, long distance speaking transmitter with metal mouthpiece, induction coil, automatic cradle switch hooks, three magnet generator, 1000 ohm bell, flexible cord and wall rosette.
The case is of pressed steel, stove enamelled black.


Cost in 1928 was £9.11.0.
Cost in 1935 was £8.8.0

K 8059
Similar to K 8058 but with four magnet generator.

Cost in 1935 was £8.15.0

K 8099
MAGNETO CALL MINING TELEPHONE

(CERTIFIED BY H.M. MINES DEPARTMENTS)
FLAMEPROOF AND INTRINSICALLY SAFE

Comprising powerful five-magnet generator, 1,000 ohm detached call with 6 in, gongs, two inset receivers with rubber protecting caps, inset granular carbon microphone, induction 2 G.E.C. dry cells.

The whole is mounted in a water proof cast iron case, provided with and inner doors. The outer is secured by means of a substantial locking handle which is quickly and easily operated. This gives access. to the operative parts of the telephone. The inner door gives access to the interior when it is required to renew the microphone batteries.

It will be observed that the receivers are mounted on flexible arms. Raising either both of these to the ear brings the transmitter into the speaking position, and by means

working in long packed bearings operates the automatic switch contacts d inside. This movement taking place every time the telephone is used maintains the microphone in a lively condition.

Elaborate precautions have been taken to meet the requirements of the Mines Department with regard to flameproof apparatus in fiery mines and at the same time to guard telephone from damage due to handling by mischievous and careless persons. The microphone and receivers are enclosed in metal cases which can only be opened by means a special key. In like manner a special key is required to open the inner door.

The generator contacts and automatic switch contacts are each enclosed in a flameproof a precaution which makes it possible to open the instrument with safety even a gaseous atmosphere.

It will be noticed that the whole of the working parts are mounted on the inner door. e latter can be readily removed from its hinges and taken to the surface for repairs, if required, without the necessity of removing the entire telephone.

A bell is not fitted to the instrument but is supplied separately.

Cost in 1935 was £19.10.0

Instrument only, without bell

Weight, 81 lbs.

Dimensions, l7.5 x 15.75 x 9.5 ins.

K 8100
MAGNETO CALL MINING TELEPHONE

(CERTIFIED BY H.M. MINES DEPARTMENT)
FLAMEPROOF AND INTRINSICALLY SAFE

Specially designed to meet mining requirements and to comply with H.M. Home Office Regulations. The cast-iron case is strong and well finished, particular care being taken to make the joint between the case and lid flameproof as well as watertight. Specially designed to meet mining requirements The flanges are one inch in width and machined so as to cool effectively any hot gases escaping as as the result of an internal explosion. The cover is securely bolted to the case. The internal unoccupied space is kept down to a minimum so as to limit the amount of explosive gas which might accumulate.

The equipment comprises:

Powerful Generator, with canvas drive, and fitted with strong handle working through a flameproof and watertight gland.

Polarised Ringing Movement wound to a resistance of 1,600 ohms and fitted with 6-inch K 8100 gong. The bobbins are wound with enamelled wire.

Solid Back Long Distance Transmitter fitted in an iron chamber on the front of door, the diaphragm being protected from damage by a fine-meshed brass gauze. An induction coil wound with enamelled wire is fitted inside the case.

Double Pole “ Bell Receiver. This receiver is fitted inside the case and is arranged so as to revolve when the listening tube (which is fitted on the left-hand side) is lifted to the ear.. At the diaphragm end of the receiver a cam is fitted. This revolves with the receiver and at the same time operates the switch springs controlling the speaking battery and receiver circuits. The gland through which the tube passes is flameproof and watertight.

Two No. 2 G.E.C. Dry Cells are fitted in metal containers which are mounted on the inside of the door by means of a metal band.

Attached to the bottom of the case is a chamber which contains strong and well. designed line terminals.

Four lugs are fitted on the sides and back of the instrument for fixing.

Weight. 80 lbs.

Dimensions. 19.25 x 14.25 x 10.75 ins

Cost in 1935 was £18.18.0

K 8105
Mining telephone made of Oak.  Fitted with Bakelite handset and five magnet generator.

Includes safety shunt on capacitor.

Cost in 1935 was £9.10.0

K 8107
Mining 200 type table telephone with generator box.  Generator box is made of Walnut and houses the bell and capacitor.

Cost in 1935 was £7.10.0

Last revised: August 09, 2005