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Electrical horology systems


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Hipp Schema        Hipp'scher Pendelantrieb

FAVAG e-24712
Detail: view in practice (FAVAG).

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Early purely mechanical time recorder with two-colour ribbon card mechanism.

Seller's signature on the dial:
"Hermann Moos & Co. Zürich"

Massive 8-day going, spring-driven lever escapement with heavy pendulum. The minute hand increments a whole minute at a time, driven by the card mechanism.

The clock has a passive contact system for driving external clocks and can therefore be considered as a master clock.

England, circa 1910, height: 86 cm

Ref.: E-34713


Interesting astronomical switch-clock with electrical minute winding system.

Signed: "Ernest Capt-Lecoultre, Fabricant-Inventeur, Orient-Vaud"

"Brevet Suisse 30807" from 1904

Lever escapement, pendulum,
winding with electro magnet, circa 5V,
walnut case, height: 100 cm,
Switzerland, early 20th century

Ref.: E-71851

general view        movement


"Alte Hauptuhr" by Siemens & Halske, type HU3.

Mechanical weight driven master clock with endless chain.

The weight is wound at the same time as a trigger pulse is sent to the external clocks. The weight therefore always remains in the same position, as shown.

Germany, circa 1915
Height: 110 cm
Tension: 12 V=

Ref.: E-12621

Alte Siemens Hauptuhr

INDUCTA master clock with inductor, type "UMI1".

Mechanical master clock with motor driven winding. The winding is activated every six hours. In the worst case it therefore has six hours of power reserve. The weight weighs 10 kg and drives both the movement and the inductor. The horseshoe-shaped magnet is almost visible on the left of the dial.

Switzerland (Landis & Gyr), 1940s,
Height: 100 cm,
Tension: 220 VAC

Ref.: E-41812


Moser-Baer, Sumiswald master clock, type H71

Mechanical master clock with spring-driven lever escapement and electrical winding.

The upper (visible) dial is driven directly from the clock movement, and the contacts for generating the trigger pulses for the external clocks are located here. The lower dial is the first external clock, and drives a signalling arrangement to mark the start and end of work periods, for example in a factory. This removes the burden of signalling from the master clock.

Switzerland, 1951,
Height: 76 cm,
Tension: 220/24V

Ref.: E-34661

H71 mit Gehäuse H71 ohne Gehäuse

FAVAG master clock.

Master clock with direct drive of the pendulum after Hipp (see detail)

The 24V accumulator for the power reserve has been removed.

Switzerland, circa 1960,
Height: 70 cm,
Tension: 220/24V

Ref.: E-24712

FAVAG mit Gehäuse FAVAG ohne Gehäuse

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Standard external dial.

A well-known design of external dial, in use since circa 1950

Diameters: 20 - 50 cm

Tensions: 12, 24 or 48V


Double-sided illuminated advertisement facade clock.

Dimensions: 90 x 90 x 30 cm

Switzerland, 1950s

Drive: 24V, minute standard trigger pulses
Illumination: 220/110V, 50-60 Hz

Ref.: E-34615

Doppelseitige Fassadenuhr

Facade clock on a factory building.
"INDUCTA", type 747

Diameter: 60 - 150 cm

From a prospectus of 1954,
SAIA AG, Murten/Switzerland


"INDUCTA" time central
(Landis & Gyr, Zug/Switzerland, 1947)

The two master clocks are electromechanically synchronised. One is the master, the other the reserve clock. In case of failure the reserve clock becomes the master clock, forming what would today be called today a "hot standby". The six small dials indicate the time of the six secondary clock lines.


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Electrical horology systems