Screw the pieces together with two screws at each angle.
A screw with a handle to turn it by and a nut for the thread is better, of course.
Good practical workmen are just as certain to use the hammer in such cases as they are careful not to use it for nice work or where the full holding power of the screw is needed.
At a distance of about 8" from one end mark a point upon this centre line and make a hole for the vise screw as before.
The trigger can be of wood or wire, pivoted on a screw or nail, so that when pulled the string will be pushed up and released (Fig.
Another equally simple way is to screw the brace for the feet upon the forward sled (Fig.
Try to keep the screw-driver from slipping from the slot of the screw (see Screw-driver).
Bore a hole at this point (see Boring) if you have a bit a trifle larger than the screw of the vise.
All joints between parts of the boiler proper to be made without bolts orscrew plates.
A spring and screwdevice for revolving the agitator.
This may be at least partially overcome by forming about two grams into a briquette by the use of a cylinder equipped with a plunger and a screw press.
Without much warning, the pulse of our engine slackened, the throb of our single screw slowed down and ceased.
I'll admit there's an element of risk in our situation--one screw is out of commission, and one engine might be better.
There is one set of triple expansion engines for each screw independently, thus allowing numerous combinations of movements.
The triple-screw system is a most decided novelty.
The tool is very compact, and has this advantage over the ordinary screw wrench, that its leverage increases as it is opened to receive nuts of larger size.
The screw driver is formed on the end of the screw bar, attached to the outer jaw of the wrench, and is taken out from the hollow of the handle when required for use.
The subaqueous foam, generated by the screw or paddle-wheels of a steamer, also sends forth a vivid green.
Throwing a small and concentrated spectrum upon a screen, by means of an endless screw we move the rectangular pile through the entire spectrum, and determine in succession the thermal power of all its colours.
Situation: The company is formed in single rank at the ready with rear sight set at zero and the slide screw normally tight.
Corrections in the deflection (side movement) of the bullet are made by means of the windage screw that moves the movable base, each division of the graduations on the rear end of the movable base being called a "point of windage.
Unless the screw driver is handled carefully and with some skill the screws are sure to be injured either at the head or thread.
It was in vain for Mr Flintwinch to try another screw at him.
Thus, in the ensuing silence, Jeremiah stood scraping his chin and looking at Arthur as though he were trying to screw his thoughts out of him with an instrument.
The face of one of the men near the screw was upturned for a moment; it was that of Stone the quartermaster.
A tiny brass screw is then driven into the piece of wood, so that it will come in contact with the center of the base of the flashlight bulb.
This little screw forms one of the electrical contacts, and one of the wires from the battery is attached to it.
It might be mentioned here that it is often necessary to drill a hole with a small hand drill before driving the screw in, to prevent splitting the wood.
The brass screw should not be driven in too far, since the bollards should be free to revolve.
The distance the screw moves forward will depend entirely upon the distance between the threads.
A boat driven with four propellers is called a quadruple-screw boat.
A brass screw passes through these and into the deck of the boat.
Temporarily screwthe tube in position, and from a piece of thin brass make a plate for the inside.
The end of the rudder-shaft is tapped, and a brass screw is used to clamp it in position after setting it with the fingers.
This set-screw is used to hold the eccentric to the crank-shaft.
It is best to screw a substantial block to the inside of the boat.
A hole is drilled in them as shown, and a screw is placed through these to hold the rudders to the side of the craft.
A boat that has two propellers is called a twin-screw boat.
When a machine screw is turned around just once, it moves forward a certain distance, as a glance at Fig.
The slow movement in altitude is given by rotating the rod he, the endless screw in which turns the small wheel at b, whose axle in turn bears a pinion-wheel working in the teeth of the quadrant a.
I know, because last Sunday, as your car came up the driveway, I borrowed his knife, on the pretext of tightening a screw in the blade of mine.
The screw cramps are now affixed, tightly wound up, and left for drying.
Sometimes a screw is found in the same place instead of nails.
In this case it should be a very loose fit to the hole, the grip will be obtained by rolling up a piece of paper and inserting it in the tail pin hole, the screw can then be used against this inside without damaging the block.
There is of course some superfluous glue to be cleared away, this having oozed out when the glue was first applied, there is also a portion of paper adhering where the screw cramp was attached over the border.
These can be easily adjusted, and the requisite pressure obtained by several screw cramps along its extent (diagrams 6 and 7).
Attention being paid to the foregoing, and the press or large screw cramp being already in position, the pressure, which must be great, is applied.
For this process the help of another person will be almost absolutely necessary, as two hands will be required for holding the parts together while the second person holds the vice and turns the screw to order.
If the parts are not much worn away, or the front and back plates are in fair condition, the rib may be glued and the screw cramp, cork or paper of course being used as a protector, and the rib will be held in position.
Intended only for river navigation, propelled by a small screw like two fishtails set at right angles, working horizontally; the vessel had but two cabins, one on either side of the central part occupied by the machinery.
The steering screw was set in rapid motion, and at first revolving with some difficulty, afterwards moving faster and more regularly, presently released us.
One screw is to make the stitch larger or smaller; we say, to regulate it.
The second screw is to regulate the tightness of the thread.
The tension is regulated by a screw which presses two little plates together.
So, in threading a machine, we must learn where the tension plates are, in order to pass the thread between them, and how the screw is turned to make the plates tight or loose.
One should be in the position of the central screw over the head, the second at the point where hole h is to be bored, the third at about the centre of the blade.
They may consist of thumb screws, and nuts, or screw eyes, and must move freely, yet without play.
The smoothing plane] The lever (1) is for straightening the plane iron, and the screw s is for adjusting the depth of the cut.
This makes a place for the screw heads, so they will be below the surface where they cannot be in the way of tools or scratch the bench.
Before placing them in position, slip two or three new rubber bands over the screw hook under the car, and tie the free end to the driving pulley so tightly that the cord will not slip on the pulley.
The old-fashioned screw vise is cheap, and a cheap vise may be made at a cost of half a dollar, by purchasing the screw and nut and making the jaw and guides by hand, but this again calls for the use of a bench.
Before cutting these, lay out the four mortises just as the centres for screw holes were located in previous model so that all four will be equally distant from the floor.
As it goes only part way through, it provides a shoulder for the screw head, and the screw is driven through a hole drilled for the purpose into the solid top.
Leave the screw heads projecting about 1/4 inch until the shelf has been fastened in position, then drive them home with the screw-driver.
It had a sharp centre for accurately locating the hole, a knife edge for cutting the fibres, and a chisel for removing the wood, but it lacked the spiral screw thread of the modern tool, and had to be forced through the wood by main strength.
Draw the two diagonals and square lines from their ends down both sides, taking care that their position is not over the screw in the bottom; because as the saw cuts deeper it may reach this screw and ruin its teeth.
In the side facing the front place a screw eye for fastening the spring or rubber bands.
On a modern auger bit, this spiral screw relieves the worker of a large part of the labour; all he has to do is to turn the brace and keep it straight, supposing of course that the bit is sharp.
It had been a narrow escape, though, and taught Lathrop something about navigating a twin screw air-ship.
These were all put in glass jars with screw tops and rubber gaskets so that even in case of an upset the contents would remain dry.
This long screw would have transfixed it and drawn it with a single pull.
If you examine the top of the cork you will observe that the screw was driven in three times before the cork was extracted.
Soon the screw took the push and Dick, under orders from Matt, headed the craft up-stream and the propeller worked just fast enough to hold her steady.
The steel hull heaved over a little under the mass of flowing water, but the screw and the rudder held her stiffly to her course.
Come, join we hands, and screw up all their spite.
