The crank shaft carries a pinion which gears into a toothed wheel of a coarse pitch, carrying cutters at the ends of the teeth.
Fixed to the pinion were three cams, for high, low and mean tides.
245) a rack I, fixed to the carriage, caused a pinion H on the gun to revolve.
The wing of the bird, like that of the insect, is concavo-convex, and more or less twisted upon itself when extended, so that the anterior or thick margin of the pinion presents a different degree of curvature to that of the posterior or thin margin.
In this instance a very slight movement at the root of the pinion, or that end of the lever directed towards the body, 1 is followed by an immense sweep of the extremity of the wing, where its elevating and propelling power is greatest - this arrangement ensuring that the large quantity of air necessary for support and propulsion shall be compressed under the most favourable conditions.
It follows that the smallest pinion of a set in which pinion the flanks are straight should have twelve teeth.
The angles, moreover, made by the wing with the horizon during the down and up strokes are at no two intervals the same, but (and this is a wing of the martin, where the bones of the pinion are short, and in some respects rudimentary, the primary and secondary feathers are greatly developed, and banked up in such a manner that the wing as a whole presents the same curves as those displayed by the insect's wing, or by the wing of the eagle, where the bones, muscles and feathers have attained a maximum development.
Rotation is communi cated by a pinion, turned by the handle c (concealed in the figure), which works in teeth cut on the edge of the flange h.
This small pinion carries a finger, M, which is arranged to catch against the finger, G, when moved up to it.
The sleeve of the pinion which carries M also carries the dial finger, and if the dial is properly graduated its finger will indicate the weight.
For the sake of compactness and convenience of reading the extension of the springs, and consequently the load, is frequently indicated on a dial, by means of a small rack and pinion, which give motion to a finger on the dial-plate, but the regularity and correctness of the indications of the finger will depend upon the condition of the rackwork and upon the friction, and these will vary with the wear of the machine.
The value d/D usually lies between the limits io/i i and 15/16, and, if a greater difference of E from R is required, a further mechanical advantage can be obtained by employing a separate hand-wheel and chain, or by forming the upper sheave with an annular spurwheel gearing with a pinion driven by a hand-wheel and chain, as in the Tangye form of Weston pulley-block.
A spur pinion D, gearing with both wheels, is carried loosely upon an eccentric E forming part of the central pin, so that when this latter is turned by the hand-wheel F and chain G the axis of the pinion describes a circle the diameter of which equals the throw of the eccentric, and a small relative motion of the two sheaves takes place, depending on the number of the teeth of the annular wheels.
A web in the focal plane of telescope marks the point in the field at which the bands are to be made to disappear; this is effected by turning the polarizer by means of a rack and pinion worked by an arm from the observer's end of the instrument.
The light is finally received in a Galilean telescope, containing an analyser and carried at the centre of a circular plate, that is graduated on its rim and can be turned in front of a vernier by means of a rack and pinion.
Technical data: 27z aluminum crown, 9z bronze pinion, detailed hubcaps, steel calibrate axles and bronze calibrate bearings.
brass ring2 inch, rack and pinion type with brass clamp ring.
Technical data: 27z aluminum crown, 9z bronze pinion, detailed hubcaps, steel calibrate axles and bronze calibrate axles and bronze calibrate bearings.
misalignment effects and axial sliding of the pinion.
pinion fine focus system.
The second wheel drives a pinion on the spindle of the " escape wheel " which turns once in 80 seconds.
pinion on the motor shaft.
A small pinion at the base of the wiper meshes with a sliding rack below.
This is achieved by having two hands on the central pinion in semi circle sub registers.
pinion steering has been retained throughout, and is still in perfect working order.
pinion shaft bearing supports of the drive.
pinion gear which rotates a pointer for direct pressure readings.
pinion railroad in the UK.
pinion mechanisms, set the safety catch before starting to wind a paddle.
Among the pieces missing was the lower spiral bevel pinion.
This powerfully argued legal O pinion from one of Wales ' most respected barristers blows that claim right out of the water.
All steel gears, 50:1 ratio when motor is fitted with 10 tooth pinion (supplied ).
This allowed the drive pinion to fall into the sump causing a large fracture through which the oil escaped.
pinion focusing, there is a screw that is turned to move the tube assembly up or down for focusing.
The teeth of the pinion z, fig.
The pinion z and the toothed wheel d are connected by an intermediate wheel and pinion Y; the numbers of teeth in the wheels and pinions are so proportioned that twenty-four revolutions of the micrometer screw produce one revolution of the drum and wheel d.
The whole stage T, carrying both spectrograms, can be moved from right to left on the steel cylinder Z, by turning the head K, on the axis of which is a pinion that gears into a toothed rack attached to the lower side of the cylinder Z.
The effect of turning the pinion V is, of course, to displace the focus both of the solar and stellar spectrographs in the field of the eyepiece, but this d .a displacement is easily restored by From Zeitschr.
A pinion is a small toothed wheel; a trundle is a pinion with cylindrical staves for teeth.
The smallest number of teeth in a pinion for epicycloidal teeth ought to be twelve (see 49)but it is better, for smoothness of motion, not to go below fifteen; and for involute teeth the smallest number is about twenty-four.
"The wing strikes the air precisely as a boy's kite would if it were jerked by its string, the only difference being that the kite is pulled forwards upon the wind by the string and the hand, whereas in the insect, bird and bat the wing is pushed forwards on the wind by the weight of the body and the power residing in the pinion itself " (fig.
The rough adjustment of the microscope can be made by a rack and pinion F; and the fine adj ustment by the screw G.
9) by the tangent screw f, acting on a small toothed wheel clamped to the rod connected with the driving pinion, there was apt to be a torsion of the rod rather than an immediate action.
This ring runs between friction wheels and is provided with teeth on its inner periphery, and these teeth transmit motion to a pinion on a spindle having at its other end another pinion which, through an intermediate wheel, rotates the heliometer tube.
It followed that when the gun was elevated or depressed, the rack caused the pinion to revolve, and the sight was thus raised or lowered to the proper height to fulfil the conditions given above; but, as Colonel Watkin said, owing to want of level of platform and other causes it was not satisfactory.
The rocking-bar is moved by a rack g into which a pinion on a cross-spindle j gears; the cross-spindle is moved by means of a worm-wheel into which a worm on the longitudinal FIG.
The wing in the insect is more flattened than in the bird; and advantage is taken on some occasions of this circumstance, particularly in heavy-bodied, small-winged, quick-flying insects, to reverse the pinion more or less completely during the down and up strokes."
During the up or return stroke, on the other hand, the posterior margin rotates in a direction from below upwards and from before backwards, so that by a similar but reverse screwing motion the pinion attacks the air from beneath.".
" The figure-of-8 action of the wing explains how an insect or bird may fix itself in the air, the backward and forward reciprocating action of the pinion affording support, but no propulsion.
The elastic properties of the wing are absolutely essential, when the mechanism and movements of the pinion are taken into account.
action with an irregular hammer-like movement, the pinion having communicated to it a smart click at the beginning of every down stroke - the up stroke being more uniform.
The toothed segment, C, actuates the pinion, F, which carries the finger, G, and this finger remains fixed in position so long as the person is standing on the platform.
If now a small weight, as a penny, be passed through the slot, H, it falls into the small box, I, and causes the lever, J, to turn; the lever, J, which turns in friction wheels at K, and is counterbalanced at 0, carries a toothed segment, L, which actuates a small pinion on the same axle as F, and is free to turn on that axle by a sleeve.
Since, however, only relatively low powers are now employed, the ordinary rack and pinion movement for focusing suffices, and for the illuminating the object only a mirror below the stage is required when the object is transparent, and a condensing lens above the stage when opaque.
The iris diaphragm i is pushed to the side by the rack and pinion t n.
By using a rack and pinion movement L the supplementary microscope can be adjusted for the images.
The ink-box is made adjustable, being carried by an arm attached to a pillar provided with a rack with which a pinion operated by a milled head screw engages.
The signal coil is suspended by fibres and is mounted together with a fixed soft iron core on a brass plate affixed to a rack, with which a pinion operated by a milled head screw engages.
The word usage examples above have been gathered from various sources to reflect current and historial usage. They do not represent the opinions of YourDictionary.com.