Watch Bands
By Felix | Category encyclopedia
Watch bands can generally be distinguished by the following properties:
- Material: metal (stainless steel, titanium, gold alloy), leather (alligator, crocodile, horse, shark, stingray and ostrich), plastic, rubber, fabric, ceramics, etc.
- Style: link belt, woven trim or solid material
- Clasp: buckle or clasp (single or double, as a bow or handle) or no clasp
- Attaching the strap to the Clock: attachment to the lugs of the watch case, with a buckle mounted clock is at 12; integration into the watch case or looping through webs on the lugs (eg NATO Strap Band)
- Expression: two sections (top and bottom) and one-piece: for example, NATO Strap band, washer with a watch band Unterlegteil under the housing and wide straps integrated into the watch case is
- Bracelet length: normal length to be worn on the bare wrist or long length to wear over clothing (eg, diving suit, flying suit, etc.) (from Wikipedia)
Tags: watch straps
Mechanism of the watch
By Felix | Category encyclopedia
Each watch has a mechanical vibrating body is a balance. This resonates with a given number of vibrations of the balance spring in watches classic 18,000 (equivalent to 2.5 Hz), modern watches often 21 600 (3 Hz) or 28,800 (4 Hz) oscillations in the half hour. And some quick Schwinger did reach 36,000 vibrations per hour (5 Hz). The balance switches on each pass the anchor. By this change it is the escape wheel possible to run a tooth on. The armature and the gear wheel to prevent the free discharge of the tension spring force on the wheels (see also isochronism).
The wheels (also called Schwingungszählwerk) is a quick translation (as seen by the spring). The switching transitions of the inhibition can be divided down to the minute, therefore, a 1 / 60 revolutions per minute makes.
The motion work decreases the strength of the Minutenradwelle and shares the revolutions of the minute wheel, change gear with an engine change on the hour tube that goes through the reduction in the Slow 1 / 12 turn in the hour.
The hour hand is on the hour tube attached to the minute hand on the so-called quarter pipe, which is via a slip clutch (which allows the pointer points) associated with the Minutenradwelle or the cannon pinion.
The crown is used to adjust the pointer and to wind the movement. (From Wikipedia)
Keywords: mechanics , Uhrmechanik , clockwork
Watch the story
By Felix | Category encyclopedia
Portable clocks were built around proven already in 1500 by Peter Henlein, however, in the form of pocket watches. However, there were probably already portable clocks. They were made possible by the invention of the mainspring, which allowed the drive and the balance (torsion pendulum) as a replacement for the suspended pendulum clock as tie-breaker. Through the watches they could shrink to manageable size. However, there was a long time before the pocket.
Further miniaturization of the movement was the turn of the 20th Century Clock shrink to size bracelet. At this time it gradually became fashion to wear the great ladies wristwatch wrist watches. This fashion was initially applied to men as "effeminate" - men used to continue the pocket watch chain. This proved to be unwieldy for some uses, however, as, for example, for pilots who were instructed at that time in her sparsely furnished with instruments aboard aircraft in a fast and precise timing. The Brazilian aviation pioneer Alberto Santos-Dumont was inspired by his friend, the Parisian watchmaker Louis Cartier built a clock for pilots, which was worn on the wrist: The Cartier Santos is considered the first wristwatch for men.
After the officers found in the First World War, that their pocket watches in the winter and generally under combat conditions proved to be impractical, the watch is set in the military and quickly ultimately in civil society and was at the war's end the general standard has become.
The first automatic watch (wristwatch with a swing of the pendulum mass) was built in 1923 by John Harwood. Harwood had constructed did not seem that Abraham Louis Perrelet as early as 1770 a pocket watch with the rotor and the coupler (ie teasing on both sides). Later built a Rolex automatic watch with one-sided winding rotor and patented it. An Automatic draws the energy for stretching the spring from the arm movements of the wearer. (From Wikipedia)
Tags: automatic watch , cartier , rotating pendulum , history , heinlein , Louis Cartier , peter heinlein , pocket watch
