1 / Construction of a clock weight from a mounting kit , Estelle, Samantha and Thibaut.
Antique clock with foliot, rod and wheel encounter.
This is a kit “Antika Uhrenbausatz” produced in East Germany (GDR) in the years 1970-80. Here is the detail of the box purchased on eBay:
|The drive wheel through which the string of weight:||The “Wheel of encounter” with 17 pins on the escape mechanism:|
“We have pressed the pivots of gear wheels in their axis. Once finished this step, we placed the front pillar on the lower and upper spacers. Then we set the dial of the clock to the entire construction. .. ”
The suspension wire of the penis:
Then regulated was hooked on foliot of the penis then we suspended against the weight and engine weight.For this we had the rope in the groove of the drive pulley that is part of the ratchet wheel.
The clock is complete, we hung on the wall, it was going a little too fast then we moved regulated outward to slow the pace. ”
Juliette, Estelle and Clementine, and Samantha Thibault
|The beautiful dial Galva performed with the software:|
2 / Experiments on the oscillation of a pendulum (3 abstracts of the same experience)
To set the clock so that it does not advance too, Estelle, and Samantha Thibault moved regulated (the two black balls) to the outside to slow down the balance. But how can we adjust the speed of a clock whose pendulum is vertical? (Pendulum weighing)
This is the purpose of the following experiments:
The experience of the pendulum (Margaux and Maxime P.)
It is assumed that as the weight of the balance is heavy it will more quickly and less weight is less heavy it goes fast. We asked whether this assumption is correct, so Maxime and I are going to experience with the tools of the board: a rule with a hole, a few pens, a mechanical pencil. The pencils will pivot at the end of regulation there will be pens we will add remove or to see if it is faster or slower.
Finding after testing: Our assumption is false because, whether heavy or light is the same oscillation.
We must make a new hypothesis.
Assume now that more weight is high more it goes fast, unless it is, the less it goes fast.
To do this experiment we use a tape Meccano holes and two weights. Justine screwed one of two weights on the perforated tape.
We noticed that in the 30s band gap and weight were 28 swings, the same pace. Then Justine put the second weight: 30 s the pendulum has 28 osillations.
We then put the two highest weight, this time there were 36 osillations 30 sec.
The summary of Carine:
“It is assumed that to swing the balance more or less quickly, remove or add weight.
To check, we put the outriggers (more or less responsible rules) on the same axis and have oscillates at the same time.
by doing this, we noticed that the most loaded pendulum swung as fast as the other, but longer.
as they hovered at the same speed we tried to put weight around the middle of the rod and we measured the number of oscillations that entered thirty seconds. it came 36 whereas with the weight after it entered into that 28.
Carine Summary Louis
We assume that in a pendulum over the end of the axis is brought to weight, the oscillations will be fast.
To see if our hypothesis is correct, it has built a mechanism with a band gap and pens. We suspended the perforated strip to pencils and pens installed three. The pace was pretty regular, and when we tried with two pens, he was always in the same pace.
We conclude that our assumption is false and that, regardless of the weight, the rate will be the same.
We have a second assumption: we believe that the more holes band is, the more it’s going slowly. So normally, it is not a weight problem.
For this, we have attached two holes in bands together, and counted the number of oscillations in thirty seconds. There were less than when there was only one band gap.
This second hypothesis is correct. Over the pendulum is, the less it goes fast.
The mechanical metronome setting is based on the same principle as the pendulum. It adjusts its clock by moving the weight on the rod of the pendulum. The closer it is to the center, the more rapid the motion.
- Some phrases related to time.
Time: “the passing of time-time passes -the passage of time-time running-find the time long-put an infinite time-time is running out- save time-wasting time-The time, c is money-take your time-arrive on time-starting time-take some time-occasionally-occasionally-It was time-have had its day.
Second or minute: get to the second-do not have a second self-There is no time to lose!-Did you give me one second?-Minute papillon! (Wait a minute!)-The moment of truth-I’ll be back in a minute-Not be to the minute.
Arrive at the last minute-one minute to the next.
Time: Put the record straight.-All in good time ! (= Good!)-My time sounded-the heyday-search for 12:00 to 2:00 p.m.-pass a bad time.
Words of family time: time, time delay, procrastinate, temporal, temporary, temporarily, contemporary.
2. Measuring instruments.
Throughout history, many measuring instruments of the time were invented:
-sundials, based on the rotation of the earth
-The hourglasses and water clocks, based on the flow of a fluid
-Candles and incense bagettes, which burn at a constant speed
-Mechanical clocks, which the pendulum or the pendulum swing, dividing time into equal parts (the beat),
-Electric clocks whose movement is produced and maintained by the oscillations of the mains current (50Hz), they have a synchronous motor,
-Electronic clocks, using the regular oscillation of a quartz or an integrated circuit; their display can be needles, with bright digits, or liquid crystals.
- The basic principlesand measurement units(pending)
- Construction of the educational pendulum CEJI (Compagnie du Jouet)See:the clock to build CEJI –
- Restoration of a grandfather clock:the old clock
“For a watch works, you have to go back as a small auto mechanics. Read EZINESPORTS for mordern style wall clocks.
The spring is the engine. When he relaxes, he forcefully rotate the gears gear and move the hands forward as the engine turns the wheels of the car.
If not halted the expansion of the spring, the needles quickly and would turn the motor force would leave at once, as when one enters without braking the wheels, a small car that we just go back .
For the needles advance neither too fast nor too slowly, always at the same speed, we must halt the expansion of the spring in small regular strokes. This is the balance of the watch that hold and release, tick, tock, tick, tock … like when with the thumb is braked then released, tick, tock, tick, tock … the spring the little car. ”
Text and diagram from the book “Little story time and watch” Exa Besançon 1970.
Text entered by Louis Benjamin
Related documents: details, diagrams and name the parts of the clock to climb
The gears of the clock (Measurement and description Louis)
When the clock is positioned vertically, we see the large driving wheel 56 teeth and 88 mm in diameter. It is placed at the bottom and drives a pinion teeth 7 and 13 mm diameter which itself is mounted on a pin with still a large toothed wheel 48 teeth and 75 mm in diameter. This large wheel meshes with a pinion teeth 6 and 12 mm in diameter attached to a rod. The stem has an “escapement wheel” 17 pins and 57 mm in diameter.
On the axis of the drive wheel forwardly of the dial, a pinion teeth 4 and 9 mm in diameter operated a large toothed wheel 49 teeth and 82 mm diameter. The needle indicating the hours fixed for that big wheel, which rotates it.
Diagram and name parts: bearings, foliot, rod, wheels, pivots, ratchet, ratchet, meeting wheel, controls, dial, needle, engine checks and balances,
Click to load the schema in large format (250 kb)
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