During the 15th and 16th centuries, clockmaking flourished, particularly in the metalworking towns of Nuremberg and Augsburg, and in Blois, France. Some of the more basic table clocks have only one time-keeping hand, with the dial between the hour markers being divided into four equal parts making the clocks readable to the nearest 15 minutes. Other clocks were exhibitions of craftsmanship and skill, incorporating astronomical indicators and musical movements. The cross-beat escapement was invented in 1584 by Jost Bürgi, who also developed the remontoire. Bürgi's clocks were a great improvement in accuracy as they were correct to within a minute a day.[35][36] These clocks helped the 16th-century astronomer Tycho Brahe to observe astronomical events with much greater precision than before.[citation needed][how?]
This special 82nd Anniversary Edition Contemporary wall clock is one our more popular pendulum chiming wall clocks and features a white dial with black Roman numerals and a brushed nickel bezel. A spun nickel pendulum bob is suspended in front of a mirrored back. Finished in Black Satin. One Year Warranty. Quartz, triple chime Harmonic movement plays your choice of Westminster, Ave Maria, or Bim-Bam chimes with volume control and automatic nighttime chime shut-off option.
Now, RCA Digital Alarm Clock is pretty basic, but for some of us, that’s all we need, right? With a bright, beaming red LED display, you’re certain to rub your eyes and wonder what weird light is pulsating from your nightstand. There’s an alarm indicator and the classic AM/PM light that we all remember from early-2000 models. You can do something different from your late 1990s-inspired clock, and that is change the brightness levels so you don’t completely burn out your retinas.
If it has the iHome name attached to it, you know it’s going to be flashy. Their Bluetooth color changing clock hits home on all the necessary marks, allowing you to talk and end phone conversations with the touch of a button, as well as the five multiple LED color settings. It isn’t all about waking up in the morning; this alarm clock has you ready to go with a fully charged iPhone, fed sweet, sweet energy while you sleep. The last alarm clock you’ll ever need is staring you right in the face – it’s time to complete your iHome collection in style.
“I have searched for a well-designed clock for kids and was so pleased I finally made this purchase. It was definitely pricier than other options, but this one is actually well-designed, usable, and does all the functions well. My daughter loves how cute it is, and the yellow light and green light has allowed us to get more sleep in the mornings, which is priceless. … We don’t use the nap feature or white noise machine all that much, but we like the night-light and wake-up training features. The size is perfect, and it’s not too bright. Plus it has the time on it, which is perfect for my preschooler who is learning about time.”
Sync your phone and play music through the Sync your phone and play music through the integrated Bluetooth speaker. With its 1-Amp USB charging port you can charge your mobile device while you sleep. Large easy to read 0.9 in. LED display and soft mood light for nighttime use. Features PM Alarm1 or Alarm2 and Bluetooth indicators. AC ...  More + Product Details Close
Now this is an alarm clock for the heaviest sleeper. If you're the type who sleeps through anything — thunderstorms, loud neighbors, earthquakes, the zombie apocalypse — you've finally met your match. Sonic Alert's Sonic Bomb Alarm Clock doesn't just rely on its 113-decibel alarm to pry your eyelids open (for comparison, that's about the same decibel level as a car horn or snow blower going off in your ear), it also has a shaker device that slips underneath your mattress or pillow to jiggle you awake, and red flashing lights that trigger with the alarm.
In order to shut off this loud alarm, you have to actually get out of bed and stand on the rug for three seconds. But if you find yourself cheating your alarm by crawling back into bed after those few seconds, you can extend the alarm for up to 30 seconds, ensuring you’ll be much more awake once the blood starts flowing to the other parts of your body.

Not just a functional accent, this oversize wall clock brings pastoral style to any empty space in your abode. Crafted from wood and metal, it features a circular silhouette and cutout roman numerals as well as spade hands fixed atop a floral-inspired motif. Two AA batteries keep this design ticking and tocking, while a 36'' W x 36'' H x 1'' D frame is sure to grab glances in the entryway or over the living room seating group.
Bring contemporary and clean-lined looks to your walls with this understated wall clock, this perfect mix of subtle, airy looks and midcentury modern aesthetics in your space. Featuring a simple rectangular metal frame finished in antique brass and distressed gray, this clock brings a warm look to your ensemble, while its elongated Roman numerals offer an updated twist on a classic look. To clean, simply wipe with a damp cloth.

Sony always makes good products, and this little cube packs a powerful alarm in its punch. When you go for the minimalist design, you’re able to incorporate more features for less money, as well as keep the nature of the product intact: in this case, it’s supposed to wake you up, and not be too flashy. You get a backup battery just in case the power fails you during a storm, but you also get ten programmable radio station buttons.
In mechanical clocks, the power source is typically either a weight suspended from a cord or chain wrapped around a pulley, sprocket or drum; or a spiral spring called a mainspring. Mechanical clocks must be wound periodically, usually by turning a knob or key or by pulling on the free end of the chain, to store energy in the weight or spring to keep the clock running.
An artful accent is all your need to take your entertaining space from every day to eye-catching. While low-slung sofas and a plush shag rug make a fine foundation, you can effortlessly dress it all up by centering this chic clock on the wall above. Pairing brushed aluminum metal with walnut-finished wood panels, this sunburst-inspired piece is brimming with mid-century style. Let it shine solo above an exposed light bulb lamp sitting on an end table so you can watch the time at your pre-dinner...

A brushed and polished brass finish gives this metal carriage alarm clock its enduring style. The decorative handle, turned brass button feet, and polished brass-tone columns at the corners add to the clock's stately presence. Beneath a glass crystal, the brushed brass-tone dial features circular, diamond-cut numeral ring, black Roman numerals, black hour and minute hands, and brass second and alarm hands.
Instead of sleepily fumbling with the alarm in the mornings trying to find the “off” switch, simply flip this alarm over to the other side. That’s it. Amazon reviewers rave about how minimalist and lightweight it is, perfect for throwing in your carry-on for vacations or business trips. Bonus: It comes in a variety of bright poppy hues, as well as more subdued colors like this modern dark wood.

An on-trend take on a retro design, this 12" round wall clock brings a splash of color to any space in your home. This budget-friendly accent showcases a circular face bordered by alternating blocks of green, blue, and red hues with black Roman numerals in the center. Its plastic frame ensures that it’s lightweight and easy to hang, while its metallic pierced hands offer subtle shimmer. This piece does not include batteries.
This Digital Bluetooth AM/FM Dual Alarm Radio Tabletop Clock from Jensen makes getting up in the morning a more appealing proposition. With the option to wake to radio or alarm, you can start your day off right. It even has an aux input so you can connect a smartphone or music player, letting you play whatever tunes you like right from your nightstand.
If the only thing that will get you out the door in the morning is some serious nagging, Clockman is for you. This chatty clock refuses to shut up, even after you get out of bed. He'll greet you at your desired time, sing while you get dressed, and even yell if you anger him. While Clockman speaks only Japanese for now, his wake-up-and-get-going message isn't lost in translation.
The piezoelectric properties of crystalline quartz were discovered by Jacques and Pierre Curie in 1880.[49][50] The first crystal oscillator was invented in 1917 by Alexander M. Nicholson after which, the first quartz crystal oscillator was built by Walter G. Cady in 1921.[2] In 1927 the first quartz clock was built by Warren Marrison and J. W. Horton at Bell Telephone Laboratories in Canada.[51][2] The following decades saw the development of quartz clocks as precision time measurement devices in laboratory settings—the bulky and delicate counting electronics, built with vacuum tubes, limited their practical use elsewhere. The National Bureau of Standards (now NIST) based the time standard of the United States on quartz clocks from late 1929 until the 1960s, when it changed to atomic clocks.[52] In 1969, Seiko produced the world's first quartz wristwatch, the Astron.[53] Their inherent accuracy and low cost of production resulted in the subsequent proliferation of quartz clocks and watches.[49]
The Mood Light Dual Radio with Nature Sounds Tabletop Clock will literally brighten your day with its color changing led and an easy-to-read 0.7” blue led display, and easy access top mounted touch controls. This model has a lot of unique features that set it apart from other clock radios, such as soothing nature sounds (brook/bubbles/forest), a multi-color led mood lamp and built-in 1 AMP charging port for charging your phone while you sleep. You can listen to your favorite FM or connect...
This 33" metal wall clock features an antique nickel-finished frame is 7" wide and curves down from the face to the wall hiding the almost 3" in depth. The frame also features 100 decorative nail heads in two rows one on the inside of the frame and one on the outside of the frame.The accurate Quartz movement is operated by one AA battery. One year warranty and Free Shipping.
The Howard Miller Chaz 625-614 Contemporary Wall Clock is finished in a Satin Silver on select hardwoods and veneers. This clock features insert mirror panels accenting the fixed front frame. The white dial has polished chrome bar hour markers and hands. The rectangle cut-out reveals a polished chrome-finished pendulum bob. The Chaz features a accurate Quartz, battery-operated, single-chime movement that plays the Westminster chime on the hour and counts the hour. It also features Automatic nighttime chime shut-off. Requires four AA sized batteries (not included). One Year Warranty and Free Shipping.
In mechanical clocks, the power source is typically either a weight suspended from a cord or chain wrapped around a pulley, sprocket or drum; or a spiral spring called a mainspring. Mechanical clocks must be wound periodically, usually by turning a knob or key or by pulling on the free end of the chain, to store energy in the weight or spring to keep the clock running.
Electric clocks that are powered from the AC supply often use synchronous motors. The supply current alternates with a frequency of 50 hertz in many countries, and 60 hertz in others. The rotor of the motor rotates at a speed that is related to the alternation frequency. Appropriate gearing converts this rotation speed to the correct ones for the hands of the analog clock. The development of electronics in the 20th century led to clocks with no clockwork parts at all. Time in these cases is measured in several ways, such as by the alternation of the AC supply, vibration of a tuning fork, the behaviour of quartz crystals, or the quantum vibrations of atoms. Electronic circuits divide these high-frequency oscillations to slower ones that drive the time display. Even mechanical clocks have since come to be largely powered by batteries, removing the need for winding.
"Stripe Clock" is a modern metallic design created by the artist, Belle. Measured at 24 inches on each side, this metal art is made from a single sheet of metal expertly grinded and tinted and made in to a functional clock. It is mainly characterized by the bright stripe in the middle of the sheet of metal. Each stroke and grind pattern on this piece accentuates the beauty of the plain sheet of metal. The glimmer coming from the shallow grinds are like street lights illuminating the city in the...
Who doesn't love an alarm clock that verbally lets you know it's time to get up and start your day? Step aside, Siri, because "Reminder Rosie" is where it's at. You can easily record up to 25 different alarm-reminders at 6 seconds each. So why not wake up to a recording of your kids saying, "Good morning, Mom!"? (Or maybe you don't want that.) We love how you can turn off the alarm by quickly pressing a button or just saying out loud, "Reminder Off." 
Fellow tea-lovers, all of our dreams are coming true! We can finally wake up to the smells and sounds of freshly brewed tea with the Teasmade Alarm Clock. Instead of making screeching noises to get you out of bed, it'll first brew you a fresh cup of tea at the time of your choice, and then sound an alarm after boiling is complete. After dark, the face of the clock illuminates with an adjustable blue night light that's dim enough to not disturb light-sensitive sleepers.
The Howard Miller Arendal II 625-551 Wall Clock is a long version of the ever popular Arendal Quartz Wall Clock. This tall, elongated 49" high wall clock features carved accents and a turned urn finial which complement the unique style. The aged dial offers black Roman numerals and decorative black hands. The long, wooden stick pendulum features an antique-brass spun bob which swings back and forth and is battery operated like all quartz clocks. The wooden stick swinging pendulum features an antique-brass spun bob. Quartz, triple-chime Harmonic movement plays choice of full Westminster or Ave Maria chimes with strike on the hour with 1/4, 1/2, 3/4 chimes accordingly or switch to hourly only. Bim Bam chime on the hour only. One year warranty and Free Shipping.
Over the past decade, many of us have gotten used to setting our alarm clocks on our smartphones rather than purchasing a dedicated device for our nightstands. Despite their seeming obsolescence, an array of cutting-edge clocks have hit the market to aid us with everything from falling asleep to promoting better sleep cycles. Even Amazon is in the alarm clock game, with the Echo Spot, a device that resembles a Magic 8 Ball and functions much like the Echo Show.
This Extra Large wall clock is 42 inch in diameter. This oversized retro gallery wall clock is an adaptation of a classic 1940s George Nelson design. The center is finished in brushed nickel and is surrounded by 12 screw on black satin balls on screw on nickel finished rods. Black satin finished hour and minute hands. Quartz, battery operated movement. Finished in Brushed Nickel Finished with Satin Black Movement: Quartz, Battery-operated Movement uses one AA battery. One year warranty and free shipping.
Special features beyond simply keeping time can be either practical or decorative. Often found in the kitchen or other busy room, some digital clocks can show readings of the indoor or outdoor temperature, display the date, and have the capacity to set an alarm or timer. A swinging pendulum is most commonly found on fancier wood and metal clocks, though some novelty styles also feature a pendulum.
About 1581 Galileo noticed the characteristic timekeeping property of the pendulum. The Dutch astronomer and physicist Christiaan Huygens was responsible for the practical application of the pendulum as a time controller in clocks from 1656 onward. Huygens’s invention brought about a great increase in the importance and extent of clock making. Clocks, weight-driven and with short pendulums, were encased in wood and made to hang on the wall, but these new eight-day wall clocks had very heavy weights, and many fell off weak plaster walls and were destroyed. The next step was to extend the case to the floor, and the grandfather clock was born. In 1670 the long, or seconds, pendulum was introduced by English clock makers with the anchor escapement.
A clock radio is an alarm clock and radio receiver integrated in one device. The clock may turn on the radio at a designated time to wake the user, and may also include a buzzer. Typically, they are placed on the bedside stand. Some models offer dual alarm and "snooze", a large button on the top that stops the alarm and sets it to ring again a few minutes later.[18] Some clock radios also have a "sleep" timer, which turns the music from radio on for a set amount of time (usually around one hour). This is useful for people who like to fall asleep with the radio on.
Amazon buyers love it as well: with more than 4,600 reviews, the clock has an average of 4.4 stars. Not only do most buyers comment that it easily awakens them even though they are heavy sleepers, but several hearing-impaired buyers also mentioned that even without the sound, the vibration and flashing lights were enough to wake them up. One customer summed it up well, "If you can sleep through this, then you may not be alive."

Tired of the same old clock hanging on your wall? Is the incessant ticking of the time a constant reminder you need to change it out? Purchase a new wall clock from our great selection. All of Zazzle's wall clock designs are printed in full color, so the design you choose will look vibrant for a long time. Not only can you choose from our great designs, you can also pick whether you want a round, square, or aqua clock to help keep track of time. Browse through the collection to find a clock you'll love every second and every minute!

The returned instants from Clock work on a time-scale that ignores leap seconds, as described in Instant. If the implementation wraps a source that provides leap second information, then a mechanism should be used to "smooth" the leap second. The Java Time-Scale mandates the use of UTC-SLS, however clock implementations may choose how accurate they are with the time-scale so long as they document how they work. Implementations are therefore not required to actually perform the UTC-SLS slew or to otherwise be aware of leap seconds.
Islamic civilization is credited with further advancing the accuracy of clocks with elaborate engineering. In 797 (or possibly 801), the Abbasid caliph of Baghdad, Harun al-Rashid, presented Charlemagne with an Asian Elephant named Abul-Abbas together with a "particularly elaborate example" of a water[12] clock. Pope Sylvester II introduced clocks to northern and western Europe around 1000AD[13]
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Pairing a simple design with a contrasting black-and-silver palette, this eye-catching 12" wall clock instantly elevates your favorite aesthetic. Its round silhouette blends effortlessly into both casual or formal spaces, while its clean profile adds sophistication to your decor. Lean into this wall clock's versatility by adding it to a transitional living room arrangement alongside a mid-century-inspired sofa and gently-tufted barrel chairs for a cohesive seating space. Anchor the ensemble...
“Great little dual alarm clock. Super easy to set the two alarms. Easy to use. It has a night light feature with adjustable dimmer, which is great. You can adjust the display completely dark so you don’t see the numbers. Then you can just hit the snooze button when the alarm is not ringing and the display lights up. It’s powered only by 3 AA batteries: no electric cord, no USB, nothing that you need. If you need a fancy alarm clock that sprays water in your face, this is not it.”
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