Minute repeater
Encyclopedia
A repeater is a complication
in a mechanical watch
or clock
that audibly chimes the hours and often minutes at the press of a button. There are many types of repeater, from the simple repeater which merely strikes the number of hours, to the minute repeater which chimes the time down to the minute, using separate tones for hours, quarter hours, and minutes. They originated before widespread artificial illumination, to allow the time to be determined in the dark, and were also used by the visually impaired. Now they are mostly valued as expensive novelties by watch and clock enthusiasts. Repeaters should not be confused with striking clock
s or watches, which do not strike on demand, but merely at regular intervals.
Both Edward Barlow and Daniel Quare
claimed the invention of the repeating watch, just before 1700. Both applied for a patent on it, which was decided in favor of Quare in 1687. Repeater watches were much harder to make than repeater clocks; fitting the bells, wire gongs and complicated striking works into a pocketwatch movement was a feat of fine watchmaking. So repeating watches were expensive luxuries and status symbols.
Whereas repeating watches made in the eighteenth century struck a bell mounted in the back of the case, during the nineteenth century wire gongs were invariably employed as they took up less space. These appear to have been invented by the Swiss around 1800. Another type of repeating watch made during the period 1750–1820 was the dumb repeating watch, these had the two hammers for hours and quarters striking blocks within the case which made a dull sounding thud which could be felt in the hand.
Generally, repeating watches strike the hours and quarters, although the best London made eighteenth century repeating mechanisms (motions) were made using the Stockten system, named after the original inventor Matthew Stockten (known also as Stockdon or Stogden) who worked for the famous makers Daniel Quare
and George Graham
.
These were made to strike the hours, quarters and half quarters (7.5 mins). From around 1750 watches this system was modified to repeat the hours, quarters and minutes (the minute repeater), the famous London maker John Ellicott appears to have been the first to produce these in numbers. During the nineteenth century following the improvements made by A.L. Breguet, the minute repeating mechanism became much more common but still to be found only in the best watches as it was expensive to make.
Repeating watches, as luxuries, survived the introduction of electric lighting and luminous
watch dials in the early 1900s, and repeaters are still found in the most expensive complicated watches, although such mechanical exercises are made by the Swiss for purely commercial reasons as their purpose is in the present day completely redundant.
article. Repeater clocks often had a cord with a button on the end protruding from the side of the clock. Pulling the cord actuated the repeater mechanism. This was called a pull repeater. Repeating carriage clocks have a button on the top to activate them.
Early watch repeater mechanisms were actuated by pushing and depressing the pendant (the top) of the watch. Later ones are activated by pushing a slide along the side of the case. This winds a separate spring to power the repeater. Releasing the slide releases the spring, and its force as it unwinds moves the repeater mechanism through its chiming sequence.
A problem with very early repeaters was that the slide could be released before it was fully cocked, causing the repeater to only chime part of its sequence. Around 1720 Matthew Stockten, appears to have been the first to invent a reliable 'all-or-nothing' mechanism that prevented this, making watch repeaters considerably more reliable and popular.
The first repeaters had a single bell mounted in the back of the case,on which 2 hammers would strike. This bell was made of "Bell metal
", a mixture of copper and tin.
The later gong
s are made of long hardened steel wires that are coiled inside the watch case. Tiny hammers actuated by the repeater mechanism strike them to make the chiming sounds. Some of the complex repeaters, such as the minute repeater, need to produce three different sounds, to distinguish hours, quarter hours, and minutes in the striking sequence. Since it is difficult to fit three bulky wire gongs into a watch movement, virtually all repeaters use two gongs, made from the two ends of a single length of wire supported in the middle, and if a third sound is needed it is made by striking the two gongs rapidly in sequence, first the high tone and then the low: "ding-dong".
The repeaters have a mechanism that allows the pace of the repeater strikes to be changed. The owner of a repeater watch can ask a watchmaker to change the pace, making it faster or slower. According to the book "Etablissage et Repassage des Montres à Répétition" by John Huguenin (page 39 of the original edition), "a minute repeater with an average speed takes about twenty seconds to strike 12 hours, three quaters and forteen minutes".
, the five minute repeater strikes the hours and then the number of five-minute periods since the hour. The mechanism uses a low tone for the hours and a high tone for the minutes. For example, 2:25 would be struck as: "dong, dong, ding, ding, ding, ding, ding".
is a quarter striking mechanism combined with a repeater. On each quarter hour, it sounds the hours and then the quarters on two gongs. In addition it can strike the hours at the push of a button.
Conceived of as clock for the blind—before talking clocks, and patented (3,925,777) in 1974, this electronic repeater called the Audocron was manufactured in the U.S. When touched it chimed out the hour, then in a higher tone - the tens of minutes, followed by the minutes in the original tone. There was a 1.5 seconds space between the groups. About 18,000 were made in the U.S. and sold worldwide.
Audemars Piguet alongside with Kari Voutilainen
both presented in 2006 decimal minute repeaters that strikes the hours, the ten-minute intervals and then the exact minutes (read here).
Complication (horology)
In horology , complication refers to any feature in a timepiece beyond the simple display of hours, minutes, and seconds.A timepiece indicating only hours, minutes, and seconds is otherwise known as a simple movement...
in a mechanical watch
Mechanical watch
A mechanical watch is a watch that uses a mechanical mechanism to measure the passage of time, as opposed to modern quartz watches which function electronically. It is driven by a spring which must be wound periodically...
or clock
Clock
A clock is an instrument used to indicate, keep, and co-ordinate time. The word clock is derived ultimately from the Celtic words clagan and clocca meaning "bell". A silent instrument missing such a mechanism has traditionally been known as a timepiece...
that audibly chimes the hours and often minutes at the press of a button. There are many types of repeater, from the simple repeater which merely strikes the number of hours, to the minute repeater which chimes the time down to the minute, using separate tones for hours, quarter hours, and minutes. They originated before widespread artificial illumination, to allow the time to be determined in the dark, and were also used by the visually impaired. Now they are mostly valued as expensive novelties by watch and clock enthusiasts. Repeaters should not be confused with striking clock
Striking clock
A striking clock is a clock that sounds the hours audibly on a bell or gong. In 12 hour striking, used most commonly in striking clocks today, the clock strikes once at 1 AM, twice at 2 AM, continuing in this way up to twelve times at 12 noon, then starts over, striking once at 1 PM, twice at 2...
s or watches, which do not strike on demand, but merely at regular intervals.
History
The repeating clock was invented by the English cleric and inventor, the Reverend Edward Barlow in 1676. His innovation was the rack and snail striking mechanism, which could be made to repeat easily and became the standard mechanism used in both clock and watch repeaters ever since. The best kind of repeating clocks were expensive to make; a separate train of wheels had to be added to the striking mechanism, to activate it one pulled a cord whereupon it would strike the hours and quarters, or even the hours and five minute divisions (five minute repeating). During the nineteenth century such clocks gradually went out of use. Due to cheap imports from France, Germany and America English clockmaking went into decline and with the advent of gas lighting repeating clocks became an unnecessary luxury.Both Edward Barlow and Daniel Quare
Daniel Quare
Daniel Quare was an English clockmaker and instrument maker who Invented a repeating watch movement in 1680 and a portable barometer in 1695.-Biography:...
claimed the invention of the repeating watch, just before 1700. Both applied for a patent on it, which was decided in favor of Quare in 1687. Repeater watches were much harder to make than repeater clocks; fitting the bells, wire gongs and complicated striking works into a pocketwatch movement was a feat of fine watchmaking. So repeating watches were expensive luxuries and status symbols.
Whereas repeating watches made in the eighteenth century struck a bell mounted in the back of the case, during the nineteenth century wire gongs were invariably employed as they took up less space. These appear to have been invented by the Swiss around 1800. Another type of repeating watch made during the period 1750–1820 was the dumb repeating watch, these had the two hammers for hours and quarters striking blocks within the case which made a dull sounding thud which could be felt in the hand.
Generally, repeating watches strike the hours and quarters, although the best London made eighteenth century repeating mechanisms (motions) were made using the Stockten system, named after the original inventor Matthew Stockten (known also as Stockdon or Stogden) who worked for the famous makers Daniel Quare
Daniel Quare
Daniel Quare was an English clockmaker and instrument maker who Invented a repeating watch movement in 1680 and a portable barometer in 1695.-Biography:...
and George Graham
George Graham (clockmaker)
George Graham was an English clockmaker, inventor, and geophysicist, and a Fellow of the Royal Society.He was born to George Graham in Kirklinton, Cumberland. A Friend like his mentor Thomas Tompion, Graham left Cumberland in 1688 for London to work with Tompion...
.
These were made to strike the hours, quarters and half quarters (7.5 mins). From around 1750 watches this system was modified to repeat the hours, quarters and minutes (the minute repeater), the famous London maker John Ellicott appears to have been the first to produce these in numbers. During the nineteenth century following the improvements made by A.L. Breguet, the minute repeating mechanism became much more common but still to be found only in the best watches as it was expensive to make.
Repeating watches, as luxuries, survived the introduction of electric lighting and luminous
Radioluminescence
Radioluminescence is the phenomenon by which luminescence is produced in a material by the bombardment of ionizing radiation such as beta particles.-Tritium:...
watch dials in the early 1900s, and repeaters are still found in the most expensive complicated watches, although such mechanical exercises are made by the Swiss for purely commercial reasons as their purpose is in the present day completely redundant.
How they work
The rack and snail striking mechanism used in repeaters is described in detail in the striking clockStriking clock
A striking clock is a clock that sounds the hours audibly on a bell or gong. In 12 hour striking, used most commonly in striking clocks today, the clock strikes once at 1 AM, twice at 2 AM, continuing in this way up to twelve times at 12 noon, then starts over, striking once at 1 PM, twice at 2...
article. Repeater clocks often had a cord with a button on the end protruding from the side of the clock. Pulling the cord actuated the repeater mechanism. This was called a pull repeater. Repeating carriage clocks have a button on the top to activate them.
Early watch repeater mechanisms were actuated by pushing and depressing the pendant (the top) of the watch. Later ones are activated by pushing a slide along the side of the case. This winds a separate spring to power the repeater. Releasing the slide releases the spring, and its force as it unwinds moves the repeater mechanism through its chiming sequence.
A problem with very early repeaters was that the slide could be released before it was fully cocked, causing the repeater to only chime part of its sequence. Around 1720 Matthew Stockten, appears to have been the first to invent a reliable 'all-or-nothing' mechanism that prevented this, making watch repeaters considerably more reliable and popular.
The first repeaters had a single bell mounted in the back of the case,on which 2 hammers would strike. This bell was made of "Bell metal
Bell metal
Bell metal is a hard alloy used for making bells. It is a form of bronze, usually approximately 4:1 ratio of copper to tin...
", a mixture of copper and tin.
The later gong
Gong
A gong is an East and South East Asian musical percussion instrument that takes the form of a flat metal disc which is hit with a mallet....
s are made of long hardened steel wires that are coiled inside the watch case. Tiny hammers actuated by the repeater mechanism strike them to make the chiming sounds. Some of the complex repeaters, such as the minute repeater, need to produce three different sounds, to distinguish hours, quarter hours, and minutes in the striking sequence. Since it is difficult to fit three bulky wire gongs into a watch movement, virtually all repeaters use two gongs, made from the two ends of a single length of wire supported in the middle, and if a third sound is needed it is made by striking the two gongs rapidly in sequence, first the high tone and then the low: "ding-dong".
The repeaters have a mechanism that allows the pace of the repeater strikes to be changed. The owner of a repeater watch can ask a watchmaker to change the pace, making it faster or slower. According to the book "Etablissage et Repassage des Montres à Répétition" by John Huguenin (page 39 of the original edition), "a minute repeater with an average speed takes about twenty seconds to strike 12 hours, three quaters and forteen minutes".
Hour repeater
The term 'repeater', without qualifiers, usually means an hour repeater. On pressing the lever or button, the repeater strikes the number of hours that have passed since 12 o'clock on a gong. This is the only type of repeater that needs a single gong. No distinction is usually made between AM and PM, so whether the time shown is 2:00am, 2:17am, 2:59am, or 2:59pm, the repeater will chime twice.Quarter repeater
The quarter repeater strikes the number of hours, and then the number of quarter hours since the last hour. The mechanism uses 2 chimes of different tones. The low tone usually signals the hours, and the high tone the quarter hours. As an example, if the time is 2:45, the quarter repeater sounds 2 low tones and after a short pause 3 high ones: "dong, dong, ding, ding, ding". Alternatively, some use a pair of tones to distinguish the quarter hours: "dong, dong, ding-dong, ding-dong, ding-dong"Half-quarter repeater
The half-quarter repeater can sound the time to half a quarter hour, or 7½ minutes. It strikes hours and then quarter hours, like the quarter repeater, then it uses a single tone in order to signal if more than half of the current quarter hour has passed. For example, if the time is 3:41 the mechanism will strike 3 low tones ("dong") to represent 3 hours, then 2 sequence tones ("ding-dong") to represent 2 quarter hours, then one high tone ("ding") to indicate that more than half of the third quarter hour has passed.Five-minute repeater
First made in 1710 by Samuel WatsonSamuel Watson (horologist)
Samuel Watson ,was a horologist who invented the 5 second repeater, made the first stopwatch. He made a clock for King Charles II and was an associate of Isaac Newton.-Inventions:...
, the five minute repeater strikes the hours and then the number of five-minute periods since the hour. The mechanism uses a low tone for the hours and a high tone for the minutes. For example, 2:25 would be struck as: "dong, dong, ding, ding, ding, ding, ding".
Minute repeater
The minute repeater works like the quarter repeater, with the addition that, after the hours and quarter hours are sounded, the number of minutes since the last quarter hour are sounded. This requires three different sounds to distinguish hours, quarters, and minutes. Often the hours are signaled by a low tone, the quarters are signaled by a sequence of two tones ("ding-dong"), and the minutes by a high tone. For example, if the time is 2:49 then the minute repeater will sound 2 low tones representing 2 hours, 3 sequence tones representing 45 minutes, and 4 high tones representing 4 minutes: "dong, dong, ding-dong, ding-dong, ding-dong, ding, ding, ding, ding"..Decimal repeater
The decimal repeater works like the minute repeater, but instead of chiming the quarter hours followed by minutes, it sounds the number of ten-minute intervals after the last hour and then the minutes. For example, if the time is 2:49 then the decimal repeater will sound 2 low tones representing 2 hours, 4 sequence tones representing 40 minutes, and 9 high tones representing 4 minutes: "dong, dong, ding-dong, ding-dong, ding-dong, ding-dong, ding, ding, ding, ding, ding, ding, ding, ding, ding". These repeaters, although first made more than 250 years ago, are very rare.Grande sonnerie
A grande sonnerieGrande sonnerie
Grande sonnerie is a complication in a mechanical watch or clock which combines a quarter striking mechanism with a repeater. On the quarter-hour, it strikes the number of hours audibly on a gong, and then the number of quarter-hours since the hour on a second gong. In addition it can strike the...
is a quarter striking mechanism combined with a repeater. On each quarter hour, it sounds the hours and then the quarters on two gongs. In addition it can strike the hours at the push of a button.
Dumb repeater
Used by the visually impaired and to tell the time quietly in meetings and concerts, 'dumb' repeater watches did not chime audibly, but instead produced vibrations. Instead of a gong, the hammer struck the hours on a solid metal block attached to the case, producing a dull 'thud' that could be felt in the hand.Ten minute repeater / Decimal repeater
A student of the Ecole Technique de la Vallée de Joux created a mechanical ten minute repeater in the 1930's.Conceived of as clock for the blind—before talking clocks, and patented (3,925,777) in 1974, this electronic repeater called the Audocron was manufactured in the U.S. When touched it chimed out the hour, then in a higher tone - the tens of minutes, followed by the minutes in the original tone. There was a 1.5 seconds space between the groups. About 18,000 were made in the U.S. and sold worldwide.
Audemars Piguet alongside with Kari Voutilainen
Kari Voutilainen
Kari Voutilainen, born in 1962, is a Finnish watchmaker residing in Môtiers, Switzerland. He started an independent watchmaking business in 2002, building a limited number of hand-made timekeepers. In 2005, he introduced the world's first decimal repeater sounding hours, ten-minute intervals and...
both presented in 2006 decimal minute repeaters that strikes the hours, the ten-minute intervals and then the exact minutes (read here).
External links
- Quarter, Minute and Decimal Repeater Videos Explanation of terminology of repeaters, Sonneries, and clockwatches, as used today.
- (fr) How Minute-Repeater Watches work
- (fr) Disassembly, cleaning, repair and reassembly of a quarter repeater
- Minute-Repeater Watches in detail
- High quality audio files of 8 modern minute repeaters watches. For each watch, there are 2 recording conditions (repeater on the wrist or on a table), and 2 recording quality (MP3 and Lossless). The watches are Audemars PiguetAudemars PiguetAudemars Piguet is a manufacturer of prestige Swiss watches which compete with Patek Philippe, Jaeger-LeCoultre and Vacheron Constantin.-Foundation:...
, Bvlgari, CorumCorumCorum Jhaelen Irsei is the name of a fictional fantasy hero in a series of two trilogies written by author Michael Moorcock.- Plot summary :...
, Frank MullerFrank MullerFrank Muller was a stage and television actor, but was most famous as an audiobook narrator.-Early life:Muller was born in The Netherlands, the eldest of five children. His family emigrated to the United States when he was five.-Career:Muller was a classically trained actor who began his career...
, IWCIWCIWC may refer to:*International WaterCentre, provides education and training, applied research and expert services in integrated water resource management*International Wrestling Cartel, a professional Wrestling company...
, Jaeger LeCoultre, PiagetPiagetPiaget is surname of:* Edouard Piaget , Swiss entomologist* Jean Piaget , Swiss developmental psychologist* Paul Piaget , a Swiss rower...
and Vacheron ConstantinVacheron ConstantinVacheron Constantin is a Swiss manufacture of prestige watches and a brand of the Richemont group. Considered by watch enthusiasts to be one of the finest traditional watch makers in the world along with Patek Philippe & Co., Jaeger-LeCoultre and Audemars Piguet.It employs around 400 people...
. The recordings were made in an anechoic chamberAnechoic chamberAn anechoic chamber is a room designed to stop reflections of either sound or electromagnetic waves.They are also insulated from exterior sources of noise...
.