Lin Gao Qiming

Chapter 1129

The poor matching accuracy makes the pin produce a "crack-crack--" sound when it moves with the pallet fork.This is not the main problem, because after all, this is a test product.

Veterans serving in the Ministry of Science and Technology have come to visit this original pendulum system and put forward their own suggestions for improvement, especially regarding materials and processing.Under their suggestion, Dr. Chung redesigned and improved some of the components, which improved the reliability of the overall operation.

In order to keep the secret of the pendulum, the wooden platform is tightly covered with wooden boards on all sides.In the hot and rainy Lingao, the environment inside is like a steamer.

This time, Zhong Lishi did not use Bart, the Mongolian Hercules, as the power source, but designed a potter's wheel on the ratchet shaft, with a sack of sand hanging from it.Use sandbags as a weight for power.Bart's job was to carry several 25-kilogram sandbags up the 10-meter-high bell tower.The moment Zhong Lishi put down the sandbag, the pallet fork was hit by the ratchet, and the tail lost its balance and slowly swung, triggering the first escapement transfer action.As the power of the ratchet is transmitted more and more to the pendulum, the swing of the pendulum gradually increases until a stable angle is maintained, driving the pallet to work rhythmically.The ratchet turns step by step with the swing of the pendulum.

This set of simple wooden prototypes marked the beginning of Lingao's watch career.It uses the pendulum governor invented in 1656 and the free escapement invented in 1765.Seeing the successful operation of No. [-] experimental mechanism, Zhong Lishi thought of Galileo who discovered the law of pendulum motion, and couldn't help but shed tears.At this very moment, the elder Galileo should be suffering from the persecution of the Holy See, and is in dire straits.When Zhong Lishi came out of the test tower in dire straits, as if he had just come out of the water, people didn't realize that he was crying, only when Zhong Xiaoying delivered dinner to his father did they realize that he was depressed and sullen.

"Father..." Zhong Xiaoying put her hand on Dr. Zhong's shoulder, "You are upset..."

"Well... I was thinking of someone..."

"It's a senior...Mister..." Dr. Zhong couldn't help holding the hand of the adoptive daughter—soft and warm.Let his mood iron up.

On the basis of the No. [-] test device, Zhong Lishi installed a set of gears to realize the relationship between the minute hand and the hour hand, redesigned the length of the pendulum and calibrated its period.Also added more sandbags and an upper hammer with a non-return ratchet.In this way, a No. [-] experimental device that can be used was born.

On the basis of the No. [-] test device, Zhong Lishi designed and trial-produced a complete set of clock machines for clock towers.The clock machine is made of bronze material to ensure its performance.Some elastic elements are made of phosphor bronze.Since this is a trial product, all the parts are individually processed by the veterans of the Ministry of Science and Technology, and some are sent to the machinery processing factory to ask professional veterans to do it.Of course, there is no such concept as tolerance control—for a long period of time, each clock tower clock machine is unique, and each has slightly different improvements.

At the same time as making the bells, Lingao Construction Company built an experimental bell tower with a brick arch structure that is very sheltered and ventilated for this set of clocks.The clock tower is located on the west side of Taibai Observatory, where the clock workshop was later located.

Zhong Lishi personally presided over the installation.This set of clock machine is named as YZB-1 clock machine, also known as "weight-checking pendulum type one". The clock machine of "weight checking and pendulum type" has only timing function, and only has minute hand and hour hand.In order to improve the running stability, there is a counterweight at the end of the hands to ensure that the rotation axis of the hands is the center of gravity.In this way, when the watch hands rotate on the side facade of the bell tower, the eccentricity will not affect the clock machine.

Three sets of "weight-checking and setting-up" have been built successively, and each set has some changes.The situation of large-scale timepieces and watches is different, so Zhonglishi has made some attempts that are different from watch designs.In the power part, he installed the driving wheels that provide power in different positions of the transmission group, and compared the advantages and disadvantages of these installation methods.In terms of pallet forks, the pallet fork stones and ratchet are the parts with the most friction.The pallet fork of the watch is made of ruby ​​which is more wear-resistant than the ratchet, because it is more convenient to replace the ratchet than the fork.For large-scale clock machines, the fork tiles are bulky and easy to replace, while the cost of large-scale ratchets is very high.Therefore, Zhong Lishi tried to use a material slightly softer than the bronze ratchet to make replaceable fork tiles on the bell tower clock machine to protect the more expensive ratchet.

The power of the "weight-checking pendulum type [-]" is four sets of heavy hammers, and the upper hammer wheels driven by four iron chains are respectively upper hammered.The purpose of using multiple weights is to alleviate the change of the torsion of the upper hammer clock machine and reduce the impact of the upper hammer on the travel time accuracy.The diameter of the upper hammer wheel is twice as large as that of the driving wheel of the heavy hammer, which is designed to save effort when hammering.The driving wheel has a non-return ratchet similar to the rear wheel of a bicycle, and the upper hammer can only be rotated counterclockwise in one direction (the rotation direction of the heavy hammer wheel is clockwise).The power of the large clock machine is relatively strong. When the clock machine is overhauled, it is necessary to let go of all the heavy hammers to ensure the safety of the maintenance personnel.In order to prevent the heavy hammer from falling accidentally, it is not allowed to stay under the heavy hammer, just like the principle of "no one can stand under the boom".

The three "weight-checking and pendulum-type" clock machines were officially put into use after a month of testing—originally, Dr. Zhong didn't intend to make this kind of experimental product enter the practical stage, but only planned to keep one installed on the experimental clock tower as a test machine. For teaching display.However, the Planning Institute believes that since it has already been built, it is too wasteful to discard it: just producing these three clock machines consumes a lot of working time of veteran craftsmen.So two were officially installed in the vacant bell tower. "Weighing Pendulum" has only one side of the clock face, and there is no lighting.Later, it was modified to add night lighting system.

Facts have proved that the bronze bell machine has a long life, although there are some minor problems, but it has been running normally under good maintenance.After 30 years of continuous operation, these three "weight-checking and pendulum-style" clock machines were replaced. As the ancestors of the watch industry in Australia and Song Dynasty, they became the treasures of the museum.

Zhong Lishi made some major modifications on the fourth clock machine: he designed two synchronized clock faces for the clock machine, and designed a simple full-time hammer device to ring a copper bell at the full hour .This simple chiming device can only make one sound.This kind of clock machine that can barely tell the time is called "the second type of pendulum for checking weight".

The "Second Type of Pendulum for Checking Weight" has just been installed on the experimental clock tower and is being tested.However, Dr. Zhong is not satisfied with this clock machine, just to verify whether his idea is feasible.

"Does the clock ring every hour?" Zhong Lishi looked at a clock in the studio.This clock looks very much in the style of this time and space: the clock face is made of porcelain, the clock case is made of wood, and the hands are made of brass.It is indeed assembled by the watch workshop of the Ministry of Science and Technology.But inside is a quartz movement produced in another time and space.

Wires were abruptly pulled out from the back of the clock and connected to a wooden box.Inside the wooden box is the "Zhong's No. [-]" battery invented by Dr. Zhong. There is no dry battery in Lingao, so the quartz clock can only be powered by an external battery.

Quartz clocks and watches were synonymous with cheap goods in the old time and space, and the retail price of ordinary finished watches was only a few dozen yuan.But it beats all mechanical watches in terms of accuracy.The Senate had purchased a large amount of timing equipment before the D day. In addition to finished clocks and watches, there were also a large number of scattered parts.A large part of it is the movement of the quartz clock and the quartz oscillator.The outer shell is made in this time and space to fully save the space on the ship.

These locally assembled quartz clocks are distributed in some important workshops that require precise time control-each quartz clock is numbered as a control material, and anyone other than veterans and authorized employees of the Ministry of Science and Technology is strictly prohibited from touching it.

The reason why Zhongli Time attaches so much importance to quartz clocks is because quartz clocks are the most accurate timekeepers they have.A timekeeping system requires accurate calibrators as a reference.At the beginning, he proposed to purchase a large number of quartz oscillators and planned to use them to manufacture the space-time reference calibration device, and use the semiconductor components he brought as amplifiers before the electronic components failed.

Dr. Chung’s plan is to use the quartz calibrators as the master, and then manufacture a batch of high-precision mechanical calibrators. Locally-made clocks are calibrated with mechanical calibrators.This graded proofreading system plays a vital role in maintaining the accuracy of timekeeping.In the old time and space, the radio timing of radio stations was the main method of schooling time.In Lingao, it is not possible to popularize this system for the time being, and a meter calibrator must be used.

"Yes, my daughter listens to it every hour, and can ring it every time." Zhong Xiaoying said respectfully and presented a folder, which accurately recorded the exact time of each ringing.

Zhong Li took a look at it, and every time the bell rang, it was a little later than the time displayed by the quartz clock, and some were even delayed by as much as one or two seconds.This is not just a matter of the speed of sound waves - he has tested it after installing the clock machine, and the travel time error is not so large. Obviously, there are still some problems with the mechanical transmission of the clock.

"There is still a problem with the transmission." Dr. Zhong said in a low voice, and put down the clamp.He looked at the rain outside, and it didn't seem to be weakening.It seems that the inspection of the clock machine will have to be done tomorrow.

He wrote a sentence on his note board: There is a canopy between the studio and the experimental bell tower.

It is eleven o'clock now, and Zhong Lishi is going to go to the Taibai Observatory to calibrate the time at zero o'clock.There is still a little time now, Dr. Zhong looked at a lot of parts and drawings on his desk, and decided to continue the trial production of the mechanical calibration device first.

(End of this chapter)