The sprockets or cylinder does not touch the film while the exposure is being made, but as the hole turns toward a perpendicular position, the sprockets catch the perforations of the film and it moves down 3/4 in.
The sprockets are made of metal pins driven into the wood.
The base of the sprockets must fit the hole in the film snugly, but the points should be slightly rounding, so that they will easily enter the perforations.
The chain is then placed over the sprockets and a leverage equal to any pipe wrench is secured.
Just as soon as the sprockets disengage the film, the shutter exposes the next section of film, and so on as rapidly as the cylinder is turned, but the average should be about 16 pictures per second.
Grooves, K, are cut through the black velvet and into the back of the door to allow a space for the sprockets to pass through freely.
He had put together three sprockets and was working on the fourth when he looked up and saw his daughter Emma sitting on the box that the Judge had vacated.
And as he worked the thought struck him suddenly that if he could put one of his sprockets in the Judge's automobile where he had seen a chain, that it would save power and stop much of the noise.
I unscrewed a small plug from the timing gear cover, stuck a screwdriver through the hole and jumped the sprockets back into proper timing.
Below the gate we let the negative make another loop and then thread it over another system of rollers and sprockets and so to the slit in the lower box, where the exposed negative is rolled.
After the negative has been led over the sprockets you notice that it is allowed to make a loop of a couple of inches of slack.
The sprockets working in the perforations pulled out the film and made the loop larger.
You can see as the crank turns that the sprockets pull the film out and guide it along its course, and the little fingers jerk it down the space of one picture, or three quarters of an inch, at each jump.
They are drawn together, and with the positive stretched flatly over the negative they pass over a pair of smooth rollers and toothed sprocketswhich enter the perforations of the two films with mathematical accuracy.
You notice that I draw it out and thread it between these rollers, making sure that the teeth of the sprockets enter the perforations along the sides of the film.
The regular chain of the cycle is likewise employed, so, when buying the wheels, it is well to select one or more chains with corresponding sprockets from the junk heap.
After rounding the ends of the studs, the sprockets were ready for use and gave perfect satisfaction.
Fasten these sprockets on the outside of the wheels as shown in Fig.
The vast majority of automobiles of the time were chain driven, and chains and sprockets capable of handling a wide range of power were completely developed and available.
Both the driving chain and the sprockets were standard bicycle parts, and a number of bicycle thread standards and other items of bicycle practice were incorporated in several places in the engine, easing their construction task.
If it is necessary to aline wheel in frame, make suresprockets and chains are in correct alinement.
Transmission Countershaft and Rear Wheel Sprockets Show Excessive Wear on One Side of Teeth.
Badly worn chains and sprockets will cause this symptom; the worn parts must be replaced (pars.
If new sprocket is being installed, it may be necessary to shift transmission forward to get chain to fit on sprockets (par.
Inspection of final drive sprockets is made when performing item 47.
The drive sprockets were thereby revolved, driving up the car.
Two horizontal cylinders rotated the driving sprockets through a mechanism whose effect was similar to the rope-gearing of the standard hydraulic elevator, but which might be described as chain gearing.
The free ends ran under the cylinder and made another half-wrap around smallsprockets keyed to the main drive shaft.
The latter run an idler pulley or sprockets at the extreme front ends and are supported by means of rollers attached to the upper portion of the frame on each side when passing over the top.
From two or four gasoline engines are used--these driving the rear axle and its integral sprockets over which the caterpillars run.
The somewhat undue height of a Ford chassis for light railway purposes was a preliminary problem to be tackled, and it was decided to substitute the driving road wheels with sprockets and perforated steel rail-wheels, drop-forged with flanges.
The best sprockets have a number of teeth to engage the film.
In addition to the above, there are the gearing and the belting which transmit motion to the various sprockets and drums shown.
Many old films are so badly worn that they will not run properly on the sprockets and must be very closely watched.
All of the sprockets and the shutter K are connected together by a train of gears (see Figure 30, which is the gearing of the Motiograph machine) and when properly adjusted they all work in proper relation to each other.
The main trouble with all sprockets is in the wear of the teeth, as in time they wear away near the body of the sprocket and form hooks.
The sprockets must have little or no end play, especially the intermittent, or it may cause the picture to wiggle sideways.
The sprockets must also be examined for accumulation of dirt, for in case there is much dirt on a sprocket, it will not guide the film properly.
The sprockets should be cleaned every day with a suitable brush.
Some sprockets are made reversible and the trouble can be remedied by turning the sprocket wheel around.
The upper magazine, the fire trap, and the sprockets must all be in perfect alignment and the film must run through the trap without touching either side.
Battison, of the Museum's division of engineering, Duryea told of the problem and the solution when he explained that the sprockets had places where the shrinkage was not even.
With sprockets outside and normal teeth inside, the wheels were about 6 inches in diameter, externally.
Behind this machinery is the jackshaft with its small differential on the right, two laminated rawhide gears[33] meshing with the iron gears of the countershaft, and the internal-gear sprockets hanging on the small pinions at either end.
These little internal-gear sprockets were hung on double-shrouded pinions secured to each end of the jackshaft.
The difficulty apparently was the result of the sprockets being cast and not machined.
A small sprocket on each end of the shaft carried a chain from the larger sprockets clamped to the spokes of each rear wheel.
An endless chain connects thesprockets on the carriage wheels to the sprocket wheels on the driving shaft.
The gear-sprockets were already missing when this was taken, and the chain lies loosely on the pinion.
If tire cement was good for fastening the hands on a stop watch, why should it not be good for fastening the sprockets on the propeller shaft of a flying machine?
The sprockets which were screwed on the shafts, and locked with nuts of opposite thread, persisted in coming loose.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "sprockets" in a variety of sentences. We hope that you will now be able to make sentences using this word.
