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Fixed Early Morning ‘on’/change-over Operation Between 03.15 and 08.30
3.
For convenience, midnight bridge is calibrated in quarter-hour intervals enabling fixed operation to be
set at any time between 20.30 and 01.00.
4.
To set ‘off’/change-over operation, procedure is as follows:
(a)
Slacken slotted screw securing operating pin.
(b)
Move operating pin along slot of midnight bridge S until it corresponds to required operating time.
(c)
Secure operating pin by tightening screw N.
For models having an operating pin on the midnight bridge as a standard fitment, only step (4) above applies.
1.
A standard fitment to rear of the solar dial Form 14 switches, is a small sector-bridge (1) Fig. 6 into which
is fitted a small spring-tensioned lever (2) integral with the operating pin (3) to give a fixed operation at any
time between 03.15 and 08.30. Settings can be made at quarter-hour intervals within this range. To enable
setting to be made, it is necessary to remove screw B (Fig. 2) and lift dial assembly off central spindle.
(WARNING: Do not loosen the centre nut surrounding dial screw B)
2.
To set the fixed early morning ‘on’/change-over operation, the procedure is as follows:
(a)
Slacken No. 8BA nut on underside of sector bridge and move spring-tensioned lever (2) Fig. 6 along sector bridge (1) until slot (4) coincides with
selected time on sector bridge scale. Tighten No. 8BA nut.
(b)
Replace dial assembly, ensuring that hub location engages with crosspin on spindle and fit retaining screw B (Fig. 2).
(c)
Fixed operation will be obtained at time required, except where solar operating pin in arm A (Fig. 2) is earlier.
3.
A spring-tensioned timing lever (5) Fig. 6, which needs no adjustment, prevents fixed pin (3) from
operating when solar operating time coincides with, or is earlier than, fixed time operation.
This timing lever (5) automatically releases small lever (2) from operating position.
FIG. 6
Models: S251 Form 14, S253 Form 14,
Q551 Form 14, Q553 Form 14
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