Tip & How-To about Watches

Watch glossary: R.

RATCHET WHEEL
Toothed wheel prevented from moving by a click pressed down by a spring.
REGULATING UNIT
Made up by balance and balance spring, governing the division of time within the mechanical movement, assuring its regular running and accuracy. As the balance works like a pendulum, the balance spring's function consists of its elastic return and starting of a new oscillation. This combined action determines the frequency, i.e. the number of vibrations per hour, and affects the rotation speed of the different wheels. In fact the balance, by its oscillations, at every vibration (through the action of the pallets), frees a tooth of the escape wheel (see escapement). From this, motion is transmitted to the fourth wheel, which makes a revolution in one minute, to the third and then the center wheel, the latter making a full rotation in one hour. However, everything is determined by the correct time interval of the oscillations of the balance.
REGULATOR
Regulating the functioning of a movement by lengthening and shortening the active section of the balance spring. It is positioned on the balance-bridge and encompasses the balance spring with its two pins near its fixing point on the bridge itself. By shifting the index, the pins also are moved and, by consequence, the portion of the balance spring capable of bringing the balance back is lengthened or shortened by its elastic force. The shorter it is, the more reactive it tends to be and the more rapidly it brings the balance back and makes the movement run faster. The contrary happens when the active portion of the balance spring is lengthened. Given today's high frequencies of functioning, even slight index shifts entail daily variations of minutes. Recently, even more refined index-regulation systems were adopted (from eccentric to micrometer screws) to limit error margins to very few seconds per day.
REMONTOIR or CONSTANT-FORCE
Old term used to denote any mechanism assuring a constant transmission of the driving power to the escape wheel.
REPEATER
Mechanism indicating time by acoustic sounds. Contrary to the watches provided with en-passant sonnerie devices, that strike the number of hours automatically, repeaters work on demand by actuating a slide or pusher positioned on the case side. Repeaters are normally provided with two hammers and two gongs: one gong for the minutes and one for the hours. The quarters are obtained by the almost simultaneous strike of both hammers. The mechanism of the striking work is among the most complex complications.
RETROGRADE
Said of a hand that, instead of making a revolution of 360░ before starting a new measurement, moves on an arc scale (generally of 90░ to 180░ and at the end of its trip comes back instantaneously. Normally, retrograde hands are used to indicate date, day or month in perpetual calendars, but there are also cases of retrograde hours, minutes or seconds. Unlike the case of the classical indication over 360░ the retrograde system requires a special mechanism to be inserted into the basic movement.
ROLLER TABLE or ROLLER
Part of the escapement in the shape of a disc fitted to the balance staff and carrying the impulse pin that transmits the impulses given by the pallets to the balance.
ROTATING BEZEL
A bezel that can be turned. Different types of rotating bezels perform different time keeping and mathematical functions.
ROTOR
In automatic-winding mechanical movements the rotor is the part that, by its complete or partial revolutions and the movements of human arm, allows winding of the mainspring.
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WATCH ON DESKFOR 24 HOURS KEEPS PERFECT TIME'WHEN I WEAR WATCH IT LOSES IN 1 HR. LOSES 40 MIN. BATTERY NEW. OMEGA CONSTELLATION 30 YEARS OLD CAN YOU HELP?


When a watch is on a desk, the balance wheel is vertical, when you are wearing it the balance wheel horizontal.

Has the watch been dropped onto a hard surface?

If the balance wheel bearing is worn or has suffered a large shock, then the shaft may move in its bearings or the bearings damaged, which may give the problem you decscribe.

Take it to a watch repairer to have it adjusted or repaired.

Dec 27, 2010 | Omega Watches

1 Answer

how to adjust the speed dial of a18 size lever set thanks


Hi bonex_boat99,

If you have one of the more common style pocket watches like Elgin, Waltham, Illinois, etc., the adjustment of the spring tension on the balance wheel spring or "hairspring" is virtually the same for most models. It doesn't matter if the watch is a Crown (stem) set or lever-set. Open the back cover, and most watches will have a second dust cover protecting the movement.

On the main housing cover of the balance wheel and hairspring configuration is a small adjustment lever. Note the current position of the lever now, and move it slightly (very, very slightly) in the direction you need to correct for. Most movements will have "S" for Slow, and a "F" for Fast. Of course this is pretty obvious for most people. This adjustment will cause the balance wheel hairspring to become a little shorter or tighter for the faster adjustment, and therefore, cause the watch to speed up slightly. The reverse procedure will "lengthen" the spring, and slow the movement down.

Since you're apparently doing this yourself or for an associate, be careful with these adjustment, making certain to not slip and damage the wheel or spring. Run the watch for several hours, and compare the timing accuracy with your known amount of error, then make further adjusts if needed.

Of course, you still may wish to take it to a certified watchmaker or repairman for this service, especially if the watch is a heirloom or otherwise valuable piece.

Good luck with this procedure! Let me know if I can be of further service.

Thanks, Bill

Sep 15, 2010 | Watches

1 Answer

How do I re fit a Tissot calendar wheel?


Take an eyeglass and read the small letters and numbers under the balance wheel. This is calibre number. Submit it here = then I probably will be able to give advise.

Jan 12, 2010 | Watches

2 Answers

My seiko orange monster gains about 5 min every 30 min


dont do anything!the watch needs service.perhaps somehow the watch fallen in a hard surface and something moved or broke in the balance wheel.the hairspring the pallet or the wheel have serious damage.to have your watch healthy wateresistance and accurate try to find a seiko authorized service center to repair your watch!

Apr 15, 2009 | Seiko 100m Diving Watch SKX033K2 Watch

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