The laminations of the stem-piece were wrapped in the normal manner and the lashing was often brought around the strut as well, up against the outboard face of the headboard.
Hard bends, as in gunwale ends and stem-pieces, were made by this means, usually after the wood had been split into a number of laminations in the area of the greatest bend.
This lacing must have passed through the laminations of the stem and stern pieces in the usual manner, avoiding the spiral lashing that held the laminae together.
After being bent, the split members were temporarily wrapped to hold the laminations together.
When dry the laminations are tightly wrapped with basswood bark cord, leaving the form of the stem-piece a quarter arc of a circle, with short tangents at each end, as shown in the illustration (p.
The piece is then treated with boiling water until the laminations are flexible, and the curve of the stem-piece can be formed and either pegged out or tied with cords until it dries in the desired shape.
The Têtes de Boule canoes had inside stem-pieces split, according to the size of the canoe, in four to six laminations and lashed with a bark or root thong in an open spiral in some canoes but close-wrapped in others.
To accomplish this, the laminations were scalded with boiling water until saturated and then the gunwale members were staked out on the ground or tied with cords to set the wood in the desired curves as it dried out.
In the round-head form, however, the outwale and cap ends were fastened on the after face of the stem-head where the laminations were curved downward as illustrated in the drawing (p.
For canoes in which the sheer turned up sharply at the ends, the gunwale members might have to be split into laminations and prebent to the required sheer before being assembled into the gunwale frame.
The laminations were then wrapped with cord and the gunwale was ready to assemble.
When the piece had been boiled and bent to its required form, the laminations were secured by wrapping them spirally with a thong of inner bark (such as basswood), of roots, or of rawhide.
Then, along lines parallel to the base of the truncated triangle, it is split into six laminations which are carried to within 6 or 7 inches of the end selected to be the heel of the stem-piece.
Just clear of the laminations a notch is cut into the top side of the heel, to hold the headboard, as will be seen.
In order to minimize eddy currents, such alternators must accordingly be built with thinner laminations and frequently poorer mechanical construction, resulting in increased cost of the machine.
The return plate and series coil laminations are also changed in proportion to correspond to the increased width of the shunt magnet.
The laminations forming the core are laced into the shunt coil, and subjected to enormous hydraulic pressure, the rivets being set at the same time, to form a compact unit and eliminate humming.
The main brushes are so made that each lamination makes an end on contact with the switch blade without any tendency to force the laminations apart.
As many laminations are used in the construction of the frame as the number of pieces in the armature, if iron of the same thickness is used.
Four of the laminationshave extensions at their lower corners to correspond to the parts shown by the dotted lines in B, Fig.
The extensions on the outside laminations are bent over at right angles to the main portion of the frame, thus forming a base upon which the motor may rest.
The field or frame of the machine is made from a number of laminations whose dimensions correspond to those given in B, Fig.
Make sure that all the edges of the different laminations are perfectly even before applying the tape.
Illustration: Details of the Armature Laminations and the Commutator Segments, and the Method of Mounting Armature Core and Commutator (Fig.
Illustration: Diagram of the Winding on the Armature and Detail of the Field Laminations (Fig.
The laminationsare rigidly bolted between two heavy end plates.
Section of Western Electric stationary armature core showing laminations clamped in place, and ventilating ducts.
Thin steel is used for thelaminations of both hub and pole piece; these are assembled and firmly riveted together under hydraulic pressure.
The laminations are securely held in place in the frame by heavy end rings and by steel clamping fingers which are firmly bolted to the frame.
The laminationsare punched separately and then carefully annealed to reduce hysteresis losses.
The armature core laminations are annealed after punching and before assembling to guard against the crystalizing effect of the punching.
The laminations are held together between two end pieces by through rivets, as shown.
The laminations are shaped with polar horns or shoes as shown, and which serve to keep the field coils securely wedged in position.
Section of General Electric Alternator showing method of dovetailing core laminationsto frame.
The laminations are of the same thickness in both hub and spider.
The stator or stationary armature consists of soft iron laminations assembled in the magnet frame with stator coils embedded in the core slots.
A greater increase in the number of laminations per inch is not economical, however, owing to the difficulties encountered in the punching and handling of extremely thin sheets of iron, and the loss of space between the plates.
The laminations are of sheet steel, annealed and japanned.
The laminations of the armature core are punched from thin sheet steel, annealed and japanned.
There is a cast ring type frame having steel side pieces which press firmly together, the steel laminationsmaking up the pole pieces.
Armature core with a few laminations showing effect on eddy currents.
The armature core is built up of thin sheet steel laminations with notches in the circumference, which, when the discs are placed together, form grooves or slots to receive the armature coils.
The poles are either of cast steel of circular or oblong section, bolted to the rim of the yoke-ring, or are built up of thin laminations of sheet steel.
Such "eddy-currents" can be practically avoided by dividing the metal core into laminations at right angles to the length of the active wires which are themselves arranged to secure the greatest rate of line-cutting and maximum E.
This construction exposes the laminationsdirectly to the air and improves the radiation, thus insuring high overload capacity and low operating temperatures.
In the field construction, the core laminations are assembled in a closed box frame, and clamped by heavy rings while under hydraulic pressure.
The field frame employs the riveted form of construction, so that the ends of the laminations are exposed directly to the air, insuring low operating temperatures and high overload capacity.
The armature laminations are built up on a cast iron sleeve having the same inside bore as the commutator.
The riveted frame is constructed of two cast iron flanges between which the stator laminations of sheet steel are securely clamped and riveted under hydraulic pressure.
The dovetail grooves are machined in the feet or ends of the arms and in these slots the laminations forming the armature coil engage.
The core of the armature consists of laminations keyed to spider with space blocks inserted at intervals to provide ventilating ducts for cooling the core and windings.
The minute spacing between these laminations and the slight oxidizing on each surface is sufficient to reduce considerably the eddy currents.
At the bottom of the semicircle the skid is joined to the slanting skids or springs depending from the bottom of the machine, and here the laminations are bolted together making the skid stiffer.
From this point it bends out in a semicircle to protect the propeller and the front of the machine and car, this portion of it being very elastic by reason of the laminations having free play one upon the other.
The rotor is made oflaminations cut from sheet iron, as shown in Fig.
The armature tunnel was then carefully filed out and all taken apart again so that the rough edges could be scraped off and the laminations given a thin coat of shellac varnish on one side.
The laminations were carefully built up on a board into which heavy wires had been driven to keep them in place until all were in position and the whole could be clamped down.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "laminations" in a variety of sentences. We hope that you will now be able to make sentences using this word.
