Gents' of Leicester. Current Supply-Service Mains

CURRENT SUPPLY-SERVICE MAINS.

AKA THE TRICKLE CHARGER.

Where Supply Mains are available, we strongly recommend their use. The modern method is to employ a small sealed Accumulator-page 40-and to Trickle Charge this from the A.C. supply-diagrams page 41.

Beyond an occasional topping up with distilled water, no other attention whatsoever is required.

In the case of a D.C. supply, a duplicate Accumulator is required-one being on charge whilst the other is in use.

Our reasons for advocating a floating Accumulator are:-

In the event of Supply Mains failure, all Clocks do not stop and would actually continue for a matter of weeks if required.
Where it is customary in Industrial Concerns to “switch off” the Mains during the night or during holiday periods, then no interference or stoppage occurs.

FIG. C151 TRICKLE CHARGING BOARD (A.C.)

Complete with Transformer, All-Metal Rectifier, Adjustable Resistance, Milliammeter and adequately fused, the whole enclosed in enamelled wrought metal case, and generally as illustrated

For Trickle Charging and Accumulator up to 80 volts at 15 mA. £4 _ 0 _ 0 each. Code word: zomna (E)
For Trickle Charging and Accumulator up to 50 volts at 25 mA. £4 _ 0 _ 0 each. Code word: zomna (E)

For Trickle Charging and Accumulator up to 80 volts at 75 mA. £6 – 18 _ 0 each. Code word: zygbe
For Trickle Charging and Accumulator up to 50 volts at 100 mA. £6 – 18 _ 0 each. Code word: zygbe

FIG. C151
Trickle Charging Board (A.C.)

FIG. CI50 TRICKLE CHARGING BOARD (A.C.)

Generally as Fig. C 151, but the whole enclosed in wrought-metal case with glazed hinged front, and screw-down fastening.

For Trickle Charging and Accumulator up to 80 volts at 15 mA. £4 _ 0 _ 0 each. Code word: zompe (E)
For Trickle Charging and Accumulator up to 50 volts at 25 mA. £4 _ 0 _ 0 each. Code word: zompe (E)

For Trickle Charging and Accumulator up to 80 volts at 75 mA. £7 – 18 _ 0 each. Code word: zygdo
For Trickle Charging and Accumulator up to 50 volts at 100 mA. £7 – 18 _ 0 each. Code word: zygdo

FIG. Cl51 TRICKLE CHARGING BOARD (D.C.)

Generally as Fig. C 151, but the whole enclosed in wrought-metal case with glazed hinged front, and screw-down fastening.

FIG. C152. TRICKLE CHARGING BOARD (D.C.)

Generally as Fig. Cl52, but the whole enclosed in wrought-metal case with glazed hinged front and screw-down fastening.

For Trickle Charging and Accumulator up to 60 volts at 25 mA. £4 – £8 _ 0 each. Code word: zupzo
For Trickle Charging and Accumulator up to 80 volts at 100 mA. £10 – £15 _ 0 each. Code word: zyjde

FIG. C150
Trickle Charging Board (A.C.)

FIG. C2164 TRICKLE CHARGING BOARD (A.C.)

Consisting of full-wave All-metal Rectifier, Transformer, Adjustable Resistance, Double Pole Main Switch, best quality Milliammeter, Double Pole Main Fuses, Double Pole Charge Fuses, Double Pole Discharge Fuses. Mounted on panel with fixing battens. Generally as illustrated, approximately 16-in >’. 16-in

For charging an accumulator up to 150 volts at 25 mA. £14 – 0 _ 0 each. Code word: zolma

FIG. C2164
Trickle Charging Board (A.C.)

Standard input 200/250 volts 50 cycles-other voltages or periodicities at slight extra cost.
Where current is “switched off” every night, the I00 mA. type must be used. Multi-circuit Installations, with Sub-Transmitting Relays, may also need larger Chargers.

/n all these Chargers arrangements can be made for providing a “Boost-charge” a useful feature when the load on the accumulator is unusually irregular. Prices upon application-please state battery voltage, and rate required.

ACCUMULATORS.

AKA THE SLAVE CLOCK.

As dealt with on pages 39 & 41 we strongly recommend as Battery Power for the “Pul-syn-etic” System, continuously trickle charged Accumulators.

The Accumulators are of the non-sulphating type, and in glass cases and sealed. (Trickle charging does not cause gassing, consequently “topping-up” is necessary only very rarely).

Fig. C6551 Accumulator is the usual type employed-3 such blocks are sufficient to drive an installation of 35 12-inch Clocks. Fig. C6552 Accumulator is of the “multi-plate” type and therefore capable of providing a greater discharge rate. It is particularly suitable when the same Battery has to operate a “Waiting-Train” Movement (see Book 5, Section 2), or to ring Bells. It is also the ideal battery in multi-circuit Installations-please see Diagram NSI I, page 37.

Types C6543 or C6543a should only be used where periodical, not trickle charging, is being used.

FIG, Cl54 HIGH EFFICIENCY DRY CELL.

An alternative method of operating the Clock System especially where Supply Mains are not available. They have been developed to provide against “shelf life” failure, and have a tested life of some 2! to 3 years when used with our System. Ordinary dry cells are not to be recommended.

GENERAL

To estimate Accumulator required :-Total resistance of Clocks+line resistance x 0.22=voltage of Accumulator necessary.

To estimate Primary Battery required: Total resistance of Clocks + line resistance / 7 + 1/2 = No. of Cells required.

The following resistances of standard clocks are given for estimating purposes:-
Fig. C6 Transmitter 26 ohms. Fig. C7 Transmitter 30 ohms.
Impulse Clocks up to 12” diam., standard movements 3 ohms.
Impulse Clocks 16″ & 18″ diam., standard movements 6 ohms, 20″ & 24″ diam., 8 ohms.

FIG. C6543 LEAD STRAPS for connecting-up cells and units, as illustrated

PRICE, per dozen … I/· Code word zoips

FIG. c8 WEAK BATTERY WARNING BELL.

For providing immediate warning that the Clock Battery requires attention. To be recommended where the Battery consists of Primary Cells such as C. I54. Warning Bells are not necessary if trickle charged Accumulators are employed. Overall size approximately 12″ x 8″ x 4″.

PRICE, each £2 • 0 • 0 (E) Code word ziymp