The clock features a solid wood core and wooden mini balls finished in rich brown tones. There are numerous silver rods radiating out from the core with some bearing wooden balls and others not. The inner assembly of balls is randomly spaced while there are twelve balls reserved for the extreme ends of hour markers. The clock is driven by a high quality Quartz movement (requiring only one AA battery; not included) 19.5 in.
Electric currents can be used to replace the weight or spring as a source of power and as a means of signaling time indications from a central master clock to a wide range of distant indicating dials. Invented in 1840, the first battery electric clock was driven by a spring and pendulum and employed an electrical impulse to operate a number of dials. Considerable experimental work followed, and it was not until 1906 that the first self-contained battery-driven clock was invented.
The Philips Wake-Up Light offers a choice of five pleasant nature sounds — or for the more traditionally minded, FM radio — for your morning wake-up call, but the real star of the show is the sunlight simulation. Twenty to forty minutes before your programmed wake-up time (you set both times), the clock will slowly begin to simulate the sunrise, complete with the softest dawn reds and oranges gently brightening into sunny, yellow light.
Molded by mid-century modern style, this 38" wall clock brings a bit of bold flair to any space in your home. Its generous size helps it grab glances (and compliments!) from guests, while its open and numberless design gives it a minimalist feel. Crafted from metal, this round silhouette sports a gold finish with silver-finished hands in the center for subtle contrast. Two AA batteries (not included) are required to operate.
Shop alarm clocks, watches, and timers designed to wake up all types of sleepers. Standard alarm clocks are not very effective at waking deep sleepers or people with a hearing loss, especially those who are severely hard of hearing or deaf. The alarm clocks include a combination of features, such as extra loud alarms, vibrating bed shakers, lamp flashers and bright strobe light that's sure to wake you up! Discover new arrivals or shop clock favorites from Sonic Alert, Global Assistive Devices, Bellman, iLuv and more!
The Howard Miller Braxton 625-628 Wall Clock is finished in Black Coffee on select hardwoods and veneers. The white dial features black Arabic numerals and minute track. The polished silver-tone bezel matches the brushed silver finished pendulum bob. The wooden pendulum stick matches the color of the case. The single chime quartz movement plays the Westminster chime on the hour and gives an hour count. One Year Warranty and Free Shipping.
In Chinese culture, giving a clock (送鍾/送钟, sòng zhōng) is often taboo, especially to the elderly as the term for this act is a homophone with the term for the act of attending another's funeral (送終/送终, sòngzhōng).[75][76][77] A UK government official Susan Kramer gave a watch to Taipei mayor Ko Wen-je unaware of such a taboo which resulted in some professional embarrassment and a pursuant apology.[78]
Go to bed with positive thoughts. Tell yourself, “I want to get up early because…” and then, actually do it. Sleep studies happen all the time, and they tell us what exterior activities are affecting our dreams, our nightmares, etc., and talking to yourself as you drift off to bed has been proven to work. If you’re looking forward to something in the morning, tell yourself about it, and your body will hold onto that through the night.
Waking up might be a little bit more pleasant when you can choose between a buzzer, the radio, or your favorite songs streaming from your smartphone or MP3 player to nudge you out of dreamland. Add to that the fun of seeing the time of day (or night) projected in large, red numerals onto your ceiling — you don't even have to turn your head to figure out how much more sleep you'll get if you can just fall back into slumber right now — and the large LCD display on the clock's face, and you have just some of the features that make the Electrohome Projection Alarm Clock our top pick.
In mechanical clocks, the low Q of the balance wheel or pendulum oscillator made them very sensitive to the disturbing effect of the impulses of the escapement, so the escapement had a great effect on the accuracy of the clock, and many escapement designs were tried. The higher Q of resonators in electronic clocks makes them relatively insensitive to the disturbing effects of the drive power, so the driving oscillator circuit is a much less critical component.[2]
This large farmhouse wall clock measures 36 inches This large farmhouse wall clock measures 36 inches across the face and features horizontal cedar wood slats a white distressed finish and hand painted black Roman numerals. Finish will vary slightly depending on each unique wood tone and grain pattern. The clock includes a high torque quartz movement antique-style spade ...  More + Product Details Close
A silent instrument missing such a striking mechanism has traditionally been known as a timepiece.[5] In general usage today, a "clock" refers to any device for measuring and displaying the time. Watches and other timepieces that can be carried on one's person are often distinguished from clocks.[6] Spring-driven clocks appeared during the 15th century. During the 15th and 16th centuries, clockmaking flourished. The next development in accuracy occurred after 1656 with the invention of the pendulum clock. A major stimulus to improving the accuracy and reliability of clocks was the importance of precise time-keeping for navigation. The electric clock was patented in 1840. The development of electronics in the 20th century led to clocks with no clockwork parts at all.
Let's face it: The ring, blare, buzz, or chirp of your alarm clock is probably never going to be your favorite sound. But then again, the angry rumble of your boss, when you show up late for work after oversleeping, is even worse. So make mornings a little easier by choosing an alarm clock that makes your return to reality if not a pleasure, then at least not a pain.

Use of a Clock is optional. All key date-time classes also have a now() factory method that uses the system clock in the default time zone. The primary purpose of this abstraction is to allow alternate clocks to be plugged in as and when required. Applications use an object to obtain the current time rather than a static method. This can simplify testing.


In China, a striking clock was devised by the Buddhist monk and inventor Yi Xing (683–727).[5] The Chinese engineers Zhang Sixun and Su Song integrated striking clock mechanisms in astronomical clocks in the 10th and 11th centuries, respectively.[6] A striking clock outside of China was the water-powered clock tower near the Umayyad Mosque in Damascus, Syria, which struck once every hour. It was constructed by the Arab engineer al-Kaysarani in 1154. In 1235, an early monumental water-powered alarm clock that "announced the appointed hours of prayer and the time both by day and by night" was completed in the entrance hall of the Mustansiriya Madrasah in Baghdad.[7]
In Chinese culture, giving a clock (送鍾/送钟, sòng zhōng) is often taboo, especially to the elderly as the term for this act is a homophone with the term for the act of attending another's funeral (送終/送终, sòngzhōng).[75][76][77] A UK government official Susan Kramer gave a watch to Taipei mayor Ko Wen-je unaware of such a taboo which resulted in some professional embarrassment and a pursuant apology.[78]
A: If your clock is waking you up too abruptly, pulling you out of REM sleep like Leo from a dream inside another dream, your body goes into a moderate level of shock. You’ll feel your heart kick up all of a sudden, because now you’re awake, and your body has been taken by surprise. You have to go from a resting heart rate of 40-50 BPM, back to a standard heart rate (or a little higher at first) of around 60-100 BPM
Don't worry, Zeus didn't show up to your home, but you'll certainly feel that way when waking up to this unit's thunderous, 113-decibel buzzing. Fair warning: It's definitely loud, so it's a good pick only if you're a heavy, heavy sleeper. Just in case the noise somehow isn't enough to pry you out of bed, this alarm clock flashes multiple bright red LEDs and comes with a bed shaker that'll really get you going. Trust us, if that sensory overload doesn't get the job done, nothing will.
By the time that phone hits the nightstand, you've lost precious sleep time, you've tricked your brain into thinking it's wake-up time instead of dream time, because the glow of the blue light emitted by your phone reduces your body's release of melatonin, the hormone that regulates your sleep cycle. Instead of relaxing, you've stimulated your mind. All of that adds up to poor quality sleep followed by a groggy, foggy, "I don't know why I'm so tired," kind of morning.
Place Sense by Hello on your bedside table, and it will help you fall asleep, stay asleep, and wake up without the grogginess or fatigue you may be used to. The small, white orb plays ambient noises to help ease you into dreamland, and a small monitor clipped to your pillow tracks your movements throughout the night, and sends feedback to an app on your smartphone. By monitoring your sleep cycles, the alarm knows the best time to wake you up in the morning so you're feeling refreshed.
A water-powered cogwheel clock was created in China in AD 725 by Yi Xing and Liang Lingzan. This is not considered an escapement mechanism clock as it was unidirectional, the Song dynasty polymath and genius Su Song (1020–1101) incorporated it into his monumental innovation of the astronomical clock-tower of Kaifeng in 1088.[19][page needed] His astronomical clock and rotating armillary sphere still relied on the use of either flowing water during the spring, summer, autumn seasons and liquid mercury during the freezing temperature of winter (i.e. hydraulics). A mercury clock, described in the Libros del saber, a Spanish work from 1277 consisting of translations and paraphrases of Arabic works, is sometimes quoted as evidence for Muslim knowledge of a mechanical clock. A mercury-powered cogwheel clock was created by Ibn Khalaf al-Muradi[20][21]
The most accurate mechanical timekeeper is the Shortt pendulum clock; it makes use of the movement described above for electric master clock systems. The Shortt pendulum clock consists of two separate clocks, one of which synchronizes the other. The timekeeping element is a pendulum that swings freely, except that once every half minute it receives an impulse from a gently falling lever. This lever is released by an electrical signal transmitted from its slave clock. After the impulse has been sent, a synchronizing signal is transmitted back to the slave clock that ensures that the impulse to the free pendulum will be released exactly a half minute later than the previous impulse. The pendulum swings in a sealed box in which the air is kept at a constant, low pressure. Shortt clocks in observatories are kept in a room, usually a basement, where the temperature remains nearly constant, and under these conditions they can maintain the correct time to within a few thousandths of a second per day.
The Philips Wake-Up Light offers a choice of five pleasant nature sounds — or for the more traditionally minded, FM radio — for your morning wake-up call, but the real star of the show is the sunlight simulation. Twenty to forty minutes before your programmed wake-up time (you set both times), the clock will slowly begin to simulate the sunrise, complete with the softest dawn reds and oranges gently brightening into sunny, yellow light.
The glossy finish reflects just enough light to show off the clock’s clean lines and rounded edges, and individuals who prefer a little bit of background ambiance throughout the night will enjoy the gentle ticking. The clock is also ultra-compact, so it won’t crowd your nightstand. The off button located on the top quickly silences the old-school beeping, too, but unfortunately, the device lacks a snooze button.
But where OK to Wake! really shines (pun intended) is in its unique feature that parents love; the clock will glow green and show a cute face when it's an acceptable time for your little one to get out of bed. That means even very young children can learn when it's okay to go looking for mommy or daddy — no need to be able to actually read the time. As your child grows, you can stop using the glow feature, and simply use the device as a regular, albeit cuter than average, alarm clock.
The right wall-mounted timepiece can be and stylish accent or the focal point of your room's decor. Wall clocks offer an opportunity to reinforce the design of your space, enhance wall décor and add functionality to your room. Showcase them alone or make the clock a stylish addition to a gallery wall. Some designs even allow you to display multiple time zones.
This large farmhouse wall clock measures 36 inches This large farmhouse wall clock measures 36 inches across the face and features horizontal cedar wood slats a white distressed finish and hand painted black Roman numerals. Finish will vary slightly depending on each unique wood tone and grain pattern. The clock includes a high torque quartz movement antique-style spade ...  More + Product Details Close
The late Roman statesman Cassiodorus (c. 485–585) advocated in his rulebook for monastic life the water clock as a useful alarm for the 'soldiers of Christ' (Cassiod. Inst. 30.4 f.).[4] The Christian rhetorician Procopius described in detail prior to 529 a complex public striking clock in his home town Gaza which featured an hourly gong and figures moving mechanically day and night.[4]

This Mission style wall clock is finished in a Mission Oak dark finish. A parchment dial features dark brown numerals and hands. Decorative, wooden moldings frame the dial. Circular brushed brass swinging pendulum is antiqued and framed with wooden, reeded grilles. Quartz, dual chime movement plays Westminster or Ave Maria chimes, and features volume control and automatic nighttime shut-off option. Shadow collection - matching floor clock available. Size: H. 32-1/2" W.16-3/4" D.6"
Although the mechanisms they use vary, all oscillating clocks, mechanical, digital and atomic, work similarly and can be divided into analogous parts.[64][65][66] They consist of an object that repeats the same motion over and over again, an oscillator, with a precisely constant time interval between each repetition, or 'beat'. Attached to the oscillator is a controller device, which sustains the oscillator's motion by replacing the energy it loses to friction, and converts its oscillations into a series of pulses. The pulses are then counted by some type of counter, and the number of counts is converted into convenient units, usually seconds, minutes, hours, etc. Finally some kind of indicator displays the result in human readable form.

A major stimulus to improving the accuracy and reliability of clocks was the importance of precise time-keeping for navigation. The position of a ship at sea could be determined with reasonable accuracy if a navigator could refer to a clock that lost or gained less than about 10 seconds per day. This clock could not contain a pendulum, which would be virtually useless on a rocking ship. In 1714, the British government offered large financial rewards to the value of 20,000 pounds,[42] for anyone who could determine longitude accurately. John Harrison, who dedicated his life to improving the accuracy of his clocks, later received considerable sums under the Longitude Act.
“This little beauty works great. I bought it when the alarm on my mobile phone began to intermittently fail me. This little travel clock is beautiful in retro seafoam green and great for travel because its bright color ensures that you will never miss picking it up from your hotel nightstand at checkout. There is a faint, pleasant ticking, the hands glow in the dark, and the nightlight button is bright when needed. The pop-up alarm button is firm and works well though I am learning not to accidentally press it and turn the alarm off when picking up the clock. Overall, a fantastic alarm clock.”
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