Laying out the upper bevels of these rafters will require careful planning.
This same principle is applicable to making chamfers or bevels with a chisel or knife (Fig.
Then nail the two strips together, with the bevels facing each other, to make a trough as shown in Fig.
Practised workmen in dovetailing usually (unless symmetry of the pins is required) determine the bevels for the pins of the first piece by eye, but the beginner would best not attempt to lay off angles or saw by eye.
Laying out and sawing the bevels for the tops of the legs is the hardest part of the job.
Plane bevels in end wood from both edges and you can often slant the plane to good advantage like the chisel in Fig.
Transfer the bevels carefully from your working drawing to the wood, and saw as exactly to the lines as you can.
After you have succeeded in laying them out, cutting the bevels at the ends, and fitting them in place, the shorter jack rafters can readily be put in place.
The hardest part of this job is to cut the bevels where the sides meet the top and at the ends of the stretcher between the sides (see Bevelling).
The straight bevels are cut with the smoothing plane, and the curves with the chisel.
In the first pen tray the bevels had been all planed.
The bevels on end of tenons should be cut with the chisel before the final fastening.
The bevels on the outer edges of the frame were planed.
Be careful to keep the blade in the same position, to prevent the bevels from becoming rounded.
When the engine is running and the boxes spring to some extent they do not carry the brass with them, because the sides being eased away gives liberty to the box to come and go slightly; the bevels also tend to keep the brass bore open.
The three pieces for a barrel head are clamped together and fed in a circular path, so that the saw cuts out the head at the same time that it bevels the edge.
This renders this form of gearing preferable to skew bevels when employed upon vertical shafts.
In addition to this bevel, however, there may be employed two vertical bevels c in the top view in Fig.
The bevels forming the cutting edge require to be very smoothly oilstoned.
Then when the brass comes home, it will flatten these pellets, and their thickness (when the brass is taken out) will show how much the bevels are out, and how much to take off the brass to make it bed.
In the absence of the bevelsthere would be a sharp corner that would soon become dull.
If this is not done, the bottom will bed first, causing a great deal of extra filing, because filing the side bevels will let the bottom down too far.
The bevels must meet exactly at the center, or the widest point, and should make an angle of about 50° with each other.
If the bevels do not meet at the widest point the tool will not clear, and the sides will rub against the revolving stock; the tool will be burned and will thus lose its temper.
It will be noticed by the collector who is observant that the bevels differ considerably from modern bevels.
The plates had a bevel of an inch in width, and these bevels followed the shape of the frame, whether square or oval.
The marking out of the bevels will be much expedited if a template is cut out of tin or card.
The leg at the diagonally opposite corner is an exact replica of the one first made; the other two are similar, but the direction of the bevels is reversed, as will be evident after a little consideration.
C and D, one of which turns the cylindrical surface and the other bevels the end of the hub.
Tool J turns the part to be threaded; tool K turns the end beyond the threaded part; and tool L bevels the corner or edge.
Before levelling up the form with the bevels and blank sheets, the plates of all open or short pages, if any, are replaced with solid pages, as these sheets and underlay are to remain through the printing of all the forms of the book.
These bevels and the larger "blank" sheets are to go between the plates and the blocks to overcome any variation there may be in the thickness and to make the surface of the form as nearly level as possible.
If the latter be rotated, the bevels would turn C and D at equal speeds, assuming that both axles revolve without friction in their bearings.
Each of these latter bevels actuates the shaft through a ratchet; but while one turns the shaft when rotating in a clockwise direction only, the other engages it when making an anti-clockwise revolution.
Between these are small bevels mounted on a shaft supported by the driving drum.
A method of obtaining the bevels for this rafter is given in Fig.
It is well to thoroughly understand the method of obtaining the lengths and bevels of irregular braces.
These bevels are applied after the joint is squared off the tangent lines.
It will now be in order to show how the square can be used for getting the lengths and bevels for braces of regular and irregular runs.
The bevelsmay be also obtained by the steel square.
These figures will cover allbevels for cutting, cornice and sheathing.
This is easy and simple enough, and without further refinement will give the lengths and bevels exactly for a flat-footed brace.
For lengths andbevels of jacks, proceed as follows: For end of roof, and set 2 feet on centers, take a board and apply the square to it, as shown in Fig.
To get the length of the rafter for our supposed building then, we must multiply this 14½ inches fifteen times, then we must use the square at the top and bottom of the timber to obtain the necessary bevels for the cutting lines.
The wreath having two pitches, the face mold will obviously be wider at one end than at the other; and if bevels are required, they must be set off on the face of each side of the block.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "bevels" in a variety of sentences. We hope that you will now be able to make sentences using this word.
