作业帮求关于闹钟的2`3句话
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求关于闹钟的2`3句话
先说明闹钟的历史（1905/8/01）由（ERIC-SHA SHUWA）发明和它的作用.用英语表达.2`3句话
先说明闹钟的历史（1905/8/01）由（ERIC-SHA SHUWA）发明和它的作用.用英语表达.2`3句话
History of the Alarm Clock
The first mechanical clocks were made in the 14th century, and were large monumental clocks. Household clocks were in use by 1620 and some of them had alarm mechanisms. The alarm is simple in concept, typically having a cam that rotates every 12 hours. It has a notch into which a lever can fall, releasing a train of gears that drives a hammer, which repeatedly hits a bell until it runs down or is shut off (many alarms have no shutoff control).
The earliest alarm clock I found reference to is a German iron wall clock with a bronze bell, probably made in Nuremberg in the 15th century. This clock is 19 inches tall and of open framework construction. It needed to hang high on the wall to make room for the driving weight to fall. Other alarm clocks from the 1500's are in existence. See “The Clockwork Universe, German Clocks and Automata 1550 - 1650,” Maurice and Mayr, 1980, Smithsonian, Neale Watson Academic Publications, New York.
The book “Early English Clocks” by Dawson, Drover and Parkes, Antique Collectors Club, 1982, documents some early alarm clocks. An example is a lantern clock ca. 1620 that has an alarm set disc on front of the dial. One longcase (grandfather) clock ca. 1690 is documented, as is a 30 hour hanging timepiece alarm by Joseph Knibb.
English clockmakers emigrated to the United States in the 18th century and no doubt carried the idea of the alarm clock with them. It has been said that Levi Hutchins of Concord, New Hampshire invented the first alarm clock in 1787. He may have made an early American alarm clock, but his clock was predated by the German and English ones mentioned above.
Simon Willard of Grafton, Massachusetts, made alarm time timepieces sometimes called “lighthouse clocks” in the 1820's. Some of the American wooden works shelf clocks of the 1820's - 30's have alarms, as do many brass movement shelf clocks after 1840.
Setting the Stage for the American "Tin Can" Alarm clock
30-hour "Marine" movement signed by L. (Laporte) Hubbell and bearing Hubbell's patent date of October 10, 1865. This type of movement was developed into the movement used in the top bell tin can alarm clock.
Top view showing large balance and spring, and the "ratchet tooth" type of detached lever escapement that uses a verge with solid steel pallets. The "pin pallet" escapement became popular in the 1880's, but makers such as Seth Thomas and Waterbury continued using the ratchet tooth escapement into the 20th century. Movement courtesy of Burt Kassap, photos by Kenneth Clapp.
This represents the next evolutionary step in the development of the "tin can" alarm clock: the addition of an alarm to the marine lever timepiece movement. (Remaining steps were to make the movement closer to square for better fit in a smaller round case, switch to rear wind and add alarm trip wheel with stationary alarm bit and setting knob.
Seth Thomas Clock Company was granted a patent in 1876 for a small bedside alarm clock. This may have been the first clock of this type, or perhaps other makers were working on this idea at the same time. In the late 1870's, small alarm clocks became popular, and the major US clock companies started making them, followed by the German clock companies. The predecessor of Westclox was founded in 1885 with an improved method of small clock construction.
Westclox introduced the in 1931. This clock was advertised with the slogan “First he whispers, then he shouts.”
The Westclox Moonbeam was introduced in 1949. This clock's alarm flashes a light on and off, then a buzzer sounds. Westclox now sells an excellent reproduction of the Moonbeam.
General Electric-Telechron first marketed a snooze alarm in 1956. The first Westclox Drowse (snooze) electric alarms were sold in 1959 and could be set for five (5) or ten (10) minutes snooze time.
Many interesting alarm clocks have been made over the years. I recall reading about a clock in which you tie a string to your little toe, and the clock yanks on it to wake you!
If you are interested in collecting alarm clocks, you might benefit from the Alarm Clock Chapter of the NAWCC .
Do you like what you see on this web site? Please donate using my Amazon.com honor system PayPage to help me add more history!
Contributors: Jeffery Wood
http://www.clockhistory.com/alarmClockHistory/index.html
The first mechanical clocks were made in the 14th century, and were large monumental clocks. Household clocks were in use by 1620 and some of them had alarm mechanisms. The alarm is simple in concept, typically having a cam that rotates every 12 hours. It has a notch into which a lever can fall, releasing a train of gears that drives a hammer, which repeatedly hits a bell until it runs down or is shut off (many alarms have no shutoff control).
The earliest alarm clock I found reference to is a German iron wall clock with a bronze bell, probably made in Nuremberg in the 15th century. This clock is 19 inches tall and of open framework construction. It needed to hang high on the wall to make room for the driving weight to fall. Other alarm clocks from the 1500's are in existence. See “The Clockwork Universe, German Clocks and Automata 1550 - 1650,” Maurice and Mayr, 1980, Smithsonian, Neale Watson Academic Publications, New York.
The book “Early English Clocks” by Dawson, Drover and Parkes, Antique Collectors Club, 1982, documents some early alarm clocks. An example is a lantern clock ca. 1620 that has an alarm set disc on front of the dial. One longcase (grandfather) clock ca. 1690 is documented, as is a 30 hour hanging timepiece alarm by Joseph Knibb.
English clockmakers emigrated to the United States in the 18th century and no doubt carried the idea of the alarm clock with them. It has been said that Levi Hutchins of Concord, New Hampshire invented the first alarm clock in 1787. He may have made an early American alarm clock, but his clock was predated by the German and English ones mentioned above.
Simon Willard of Grafton, Massachusetts, made alarm time timepieces sometimes called “lighthouse clocks” in the 1820's. Some of the American wooden works shelf clocks of the 1820's - 30's have alarms, as do many brass movement shelf clocks after 1840.
Setting the Stage for the American "Tin Can" Alarm clock
30-hour "Marine" movement signed by L. (Laporte) Hubbell and bearing Hubbell's patent date of October 10, 1865. This type of movement was developed into the movement used in the top bell tin can alarm clock.
Top view showing large balance and spring, and the "ratchet tooth" type of detached lever escapement that uses a verge with solid steel pallets. The "pin pallet" escapement became popular in the 1880's, but makers such as Seth Thomas and Waterbury continued using the ratchet tooth escapement into the 20th century. Movement courtesy of Burt Kassap, photos by Kenneth Clapp.
This represents the next evolutionary step in the development of the "tin can" alarm clock: the addition of an alarm to the marine lever timepiece movement. (Remaining steps were to make the movement closer to square for better fit in a smaller round case, switch to rear wind and add alarm trip wheel with stationary alarm bit and setting knob.
Seth Thomas Clock Company was granted a patent in 1876 for a small bedside alarm clock. This may have been the first clock of this type, or perhaps other makers were working on this idea at the same time. In the late 1870's, small alarm clocks became popular, and the major US clock companies started making them, followed by the German clock companies. The predecessor of Westclox was founded in 1885 with an improved method of small clock construction.
Westclox introduced the in 1931. This clock was advertised with the slogan “First he whispers, then he shouts.”
The Westclox Moonbeam was introduced in 1949. This clock's alarm flashes a light on and off, then a buzzer sounds. Westclox now sells an excellent reproduction of the Moonbeam.
General Electric-Telechron first marketed a snooze alarm in 1956. The first Westclox Drowse (snooze) electric alarms were sold in 1959 and could be set for five (5) or ten (10) minutes snooze time.
Many interesting alarm clocks have been made over the years. I recall reading about a clock in which you tie a string to your little toe, and the clock yanks on it to wake you!
If you are interested in collecting alarm clocks, you might benefit from the Alarm Clock Chapter of the NAWCC .
Do you like what you see on this web site? Please donate using my Amazon.com honor system PayPage to help me add more history!
Contributors: Jeffery Wood
http://www.clockhistory.com/alarmClockHistory/index.html