Tappet valve drills were the earliest design made for regular work, and are now the only type really suitable for work with steam, as the condensation of the steam interferes with other valve actions.
Specially hardened surfaces on pistons and tappets are needed as well as large wearing surfaces, or renewable bushings, for the tappet to rock on.
The resistance and pressure of the tappettends to throw increased and unequal wear on the opposite side of the cylinder.
See if tappet clamp screws are tight and cottered.
A walking beam or rocker lever is necessary to transform the upward motion of the tappet rod to a downward motion of the valve stem.
The pin on which this member fulcrums may wear as will also the other pin acting as a hinge or bearing for the yoke end of the tappet rod.
When the exhaust valve is operated by the tappet rod and rocker arm the intake valve is also carried down with it.
By an ingenious rocker arm and tappetrod arrangement it is possible to operate both valves with a single push rod.
Of two main valves, actuated by tappet rods which enter into the hollow piston rods, and are moved by tappet plates, which are fastened to the steam piston heads.
As this piston very nearly completes its stroke, the tappet plate "L" (see Fig.
The short end of the lever which is struck down by the tappet c, is driven against the end of an elastic beam a, and immediately rebounds, causing the long end to strike a harder blow upon the anvil s.
On the upper end of each pin, a small arm or tappet piece m, fig.
Each stamp has a tappet at the back, which requires to be daubed with grease on the lower side that it can be raised more easily.
These bridge pieces were formed from chrome vanadium steel and milled to an 'H' section, and the bearings for the valve-tappet were forged solid with them.
The speed variation of this engine was obtained by varying the extent and duration of the opening of the exhaust valves, and was controlled by the pilot by hand-operated levers acting on the valve tappet rollers.
Each time the bell falls and the tappet strikes the pawl, one compartment of the carbide containers discharges its contents down the shoot K into the generating tank B.
A tappet on the bell of an equalising gasholder depresses a lever which causes water to flow into a funnel, the outlet of which leads to a generating chamber containing carbide.
A tappet E on the bell of the gasholder comes into contact with, and depresses, the open end of the swivelled pipe when the bell falls below a certain point.
N is a tappet or thin flat bar attached to the main lever, and which works backwards or forwards between the wedges in the wedge frame O.
Lever 2 can then be pulled over, and will move the wedge Q to the right into the recess of tappet of lever 3, and present its own recess for wedge P.
The pulling over of lever 1 completes the series, by moving the wedge P over to the right into the recess of tappet of lever 2.
Defn: A rod carrying a tappet or tappets, as one for closing the valves in a Cornish pumping engine.
In going down, thetappet of the piston rod strikes the upper handle, and throws the catches and handles to the position shown in Fig.
The small spring at the bottom of the tappet-arm keeps the tappet in the position shown in the drawing, as the arm rises, yet allows it to pass the teeth on the return motion.
See that valve springs are in good condition and properly secured; that valve tappet adjusting screws and lock nuts are in good condition; and that valve covers are in good condition, secure, and not leaking oil.
Turn engine in direction in which it runs until valve tappet indicates front cylinder is on compression stroke (directly after front cylinder intake valve closes).
Before turning down valve spring covers, inspect paper gasket between each cover and tappet guide.
When engine is cold, adjust valve tappetclearance to 0.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "tappet" in a variety of sentences. We hope that you will now be able to make sentences using this word.
