AS 1580

AS 1580
AS 1580

Description

The AS 1580, called "Maximatic" debuted 1958. It had a selfwindig mechanism, which was partially integrated and wound in both directions. The "Maximatic" caliber was used in at least three families until it was surpassed by the series 1716. These three families were the 1580-series, the 1680-series and the 1700 series. The differences are small, hardly noticeable, and even the Flume Werksucher does not show them in detail.

On this movement, the oscillating weight is axle-beared.

movement view without rotor
movement view without rotor

The oscillating weight with its outer teeth is located in a depthened part of the upper selfwinding plate.

oscillating weight with open lock
oscillating weight with open lock

With a locker and its screw, the oscillating weight can be released from the axle.

selfwinding mechanism
selfwinding mechanism

The selfwindig mechanism consists of three gears: A click wheel, which is driven by the oscillating weight, a further click wheel, which is driven by the first one and turns in the opposite direction, and a reduction wheel, which drives the winding mechanism on the main plate.

Oscillating weight in contact
Oscillating weight in contact

The oscillating weight turns the first click wheel in both directions.

selfwinding mechanism, gears
selfwinding mechanism, gears

The second click wheel is driven by the first one and so turns on the opposite direction.

selfwinding mechanism, click wheel in contact
selfwinding mechanism, click wheel in contact

The click changer achieves, that the pinion only turns in one direction and is released in the other direction. With that, it is guaranteed, that although both wheels turn in both directions, their pinions only turn in one single direction. And this is a requirement for a selfwinding mechanism, which winds in both directions with a very small dead angle.

upper plate selfwinding mechanism
upper plate selfwinding mechanism

The two click wheels are jewel-beared, but only on the movement side. The reduction wheel is beared in a hardened metal bearing - here's indeed a difference to the other "Maximatic"-caliber families, on which this wheel is jewel-beared, too, and even has got a cap jewel.

movement without selfwinding mechanism
movement without selfwinding mechanism

movement without escapement"> The construction of the movement works is pretty modern for 1958 as the center second is directly driven.

main plate with minute wheel and cock
main plate with minute wheel and cock

The save vertical space, the flat minute wheel is beared under an own cock. Even todays' movements often use that kind of construction!

main plate only with mainspring barrel
main plate only with mainspring barrel

The mainspring barrel is beared under a very small bridge. On this, just on standard handwound movements, a click mechanism is used.

breguet coupling below the mainspring barrel
breguet coupling below the mainspring barrel

To release the selfwinding mechanism on handwinding the movement, a breguet coupling is used on the bottom of the mainspring barrel. The decoupling of the selfwinding mechanism reduces wear on its gears.

main plate without mainspring barrel, with breguet-clutch
main plate without mainspring barrel, with breguet-clutch

Below the mainspring barrel, you can see the second part of the breguet coupling. It is driven by the dial-side reduction wheel of the selfwindig mechanism. This wheel is turned by the selfwindig mechanism shown above.

main plate
main plate

As you can see, there's still a lot of unused space on the main plate. The movement construction is a very efficient one.

dial side view
dial side view

On the dial side, you immideatly recognise the Incablock shock protection with its own plate. On other movements, there are different shock protection systems or even no shock protections at all.

Of course, such a fine movement has got a yoke winding mechanism. Here, the setting lever spring has got a very special shape (at position "4").



Technical data

ManufacturerAS
Caliber1580
Number of jewels17
EscapementAnchor with pallets
BalanceGlucydur screw balance
Shock protection(s)Incabloc
Balance cock directionclockwise
Hairspring studfixed
Regulator typeHairspring key
Movement constructionFork
Escapement wheel, Fourth wheel, Third wheel
Center wheel
Mainspring barrel
Construction typesolid construction
Winding mechanismyoke
Setting lever spring2 holes
FeaturesSCD,AUT
FunctionsHour, minute, second, selfwinding
Beats per hour18000
Size111/2''' (measured: 25,6 mm)
Production time1958 - 196?
Image in Flume Werksucher 1962 94
Factsheet

Test Results

The movement came loose, only with a dial, into the lab. It was probably taken of a gold watch (whose case was melted, what a pity!). To ensure, that there's no dirt in the movement, it was completely disassembled, cleaned and oiled.

During the disassembly, a large water damage became visible. It could be removed more or less, but there's sure some invisible damage on the movement.

Timegrapher Protocol

The results on the timegrapher are pretty poor, especially on such a fine movement (selfwindig and with Glucydur screw balance) from such a fine manufactory.

It's likely, that the water damage above, and maybe also some shocks in the past and probably long revision periods harmed the movement and are responsible for the results. These are strongly depending on the position, but they are very constant!.

dial down
dial down

dial up
dial up

12 up
12 up

3 up
3 up

6 up
6 up

9 up
9 up

Measured Values

horizontal positions
dial down  +20 seconds/day
dial up  +25 seconds/day
vertical positions
12 up  -5 seconds/day
3 up  -20 seconds/day
6 up  +10 seconds/day
9 up  +60 seconds/day
timegrapher measurings
As told already - the deviations depend largely on the position.

Usage gallery



Links
Ranfft Uhren: AS 1580 (de) (en)