Plug

“ When a plug—the answering plug, for instance—is inserted into a jack, current at once flows from the positive pole of the left-hand battery through the winding of the relay 2 to the sleeve of the plug, thence to the sleeve of the jack and through the cut-off relay to ground. ”

“ The plug of each cock has on its side a small hollow, which during one part of its revolution presents itself under the oil-pipe, and receives a charge of oil. During another part of its revolution, which is timed to correspond with the flow of gaseous mixture to the cylinder, the hollow of the plug presents itself to the bend of a pipe leading from the top of the cylinder to a port opening into the cylinder below the regenerator, in which port are situated two wires of platinum. ”

“ The plug and firecock have both certain advantages and disadvantages, which are now described.
The plug, with a canvas cistern, is the easiest mode of obtaining water; the plug-box being only the size of a paving-stone, is no annoyance in the street, and the water has only one angle to turn before it is delivered. ”

“ With a small round file cut two grooves opposite each other in the plug, by filing between the scratched lines, leaving the brass between them one-sixteenth of an inch or less thick, as seen in Fig. 22. Drill a hole one-eighth of an inch in diameter and a quarter of an inch deep down the top end of the plug, and another up the lower end, to fit one of your small screws. ”

“ To appreciate what the difference of a thousandth of an inch makes in a true fit, you should handle a set of plug and ring gauges; the ring a true half-inch internally, the plugs half-inch, half an inch less one ten-thousandth of an inch, and half an inch less one-thousandth, in diameter.
The true half-inch plug needs to be forcibly driven into the ring on account of the friction between the surfaces. The next, if oiled, will slide in quite easily, but if left stationary a moment will "seize," and have to be driven out. ”

“ The plugs, after being so put up as to preserve their identity under pressure, are, as is well known, placed in a frame and subjected to pressure, and reduced to a smaller and compact mass, which is then boxed up and is ready for market. ”

“ Preparing a compound plug for service.—The transformer to be used is first tested for a good circuit between the red wires, a poor circuit between the ends of the black wire, a good circuit between the black or primary lead and the reactance terminal, no circuit between the red and black wires, and no circuit between any wire and the case. ”

“ The single plug used with each decade is never out of use, being either in the zero position or set on some value, and is therefore not easily lost by being laid aside. The use of only one plug in a decade makes it easy to ascertain that the plug is making good contact as only one block in a row is plugged at a time, the other blocks are not kept under a strain by having plugs forced tightly between them. ”

“ Alice finished soldering the first row of wires in the plug and started in on the second. So old Liverlips thought she wasted time, did he? Well, she'd show him. She'd get out her sixteen plugs tonight.
"Junior kept me up all night last night," Lois said. "He's cutting a tooth." ”

“ The line terminals consist of a spring
bearing against a plate, the circuit being completed through their point
of contact. A plug or wedge composed of two metallic faces insulated
from each other is adapted to wedge the contact open. Terminals of a
loop circuit are connected to the faces of the wedge. Thus on sliding it
into place, the loop circuit is brought into series in the main circuit.
Synonym--Plug Cut Out--Spring Jack.
Cutting of Lines of Force.
A field of force is pictured as made up of lines of force; a conductor
swept through the field is pictured as cutting these lines. ”

“ Plück"er tube (?) . [So named after Julius Plücker, a German physicist.] (Physics) (a) A vacuum tube, used in spectrum analysis, in which the part through which the discharge takes place is a capillary tube, thus producing intense incandescence of the contained gases. (b) Crookes tube.
Plug, n. -- Breech plug (Gun.) , in breech-loading guns, the metal plug or cylinder which closes the aperture in the breech, through which the gun is loaded. ”

“ The spark plugs, though used, are nevertheless Champion plugs and not those of another make. [5] There is evidence to support what one would suspect, that a used spark plug which has been repaired or reconditioned does not measure up to the specifications of a new one. ”

“ Pitcher Pump. A hand pump which takes its name from the shape of its discharge.
Plug-valve. This is a tapering plug which turns in a shell, example, the plug of a faucet. See Cock. A fire-plug is a street hydrant to which a hose may be attached.
Plumb-bob. This is a device for testing whether anything stands exactly vertical; a plumb-rule contains a plumb-bob.
27
Pressure-reducing Valve. A valve for reducing high boiler pressure to low pressure, for steam heating, etc.
Priming. To fill a pump with water when it refuses to lift of its own action, is called “priming the pump.” ”

“ Around the outside of the plug a little groove is cut, and when it is inserted the flesh band of the lip fits in this groove and thus holds the plug in place. With age the flesh bands relax considerably, and the plugs of old persons are for this reason generally larger than those of younger ones. ”

“ The cocks of the glass tubes, as well as of the gauge cocks, should be furnished with stuffing boxes and with bottoms, unless the water enters through the bottom of the plug, which in gauge cocks is sometimes the case. ”

“ A silanized glass wool plug held in place with a metal spring precedes the front section and a urethane foam plug follows the back section. Pressure drop across the tube at 1.0 L/min air flow must be less than 3.4 kPa. Tubes are commercially available. 2. Personal sampling pump, 0.01 to 1 L/min, with flexible connecting tubing. ”

“ Sime Bentley sez have a row of holes bored right through the sides of the house to let in the air, and when you didn’t want to use ’em plug ’em up, when you want a little air take out one stopple, when you want a good deal take out a hull row of plugs. ”

“ If the plugs be made of white wax, they will generally answer the best, as they admit of being accurately moulded to the form of the openings of the ears. Plugs made of turned wood will sometimes be sufficient. ”

“ A. With a dry cell and a circuit detector. A closed-circuit test is all that is necessary. This should always be done under the supervision of an experienced electrician.
Q. What apparatus is used in preparing a compound plug complete?
A. Bench vise, S-wrench, large monkey wrench, screw driver, small pliers, navy knife, loading wire, cotton-braided wire, priming charge, fuses, rubber packings, brass washers, followers, lead washers, set screws, red lead or ruberine, circuit detector, brass jointers, rubber tape. ”

“ To Professor E. Branly unquestionably belongs the honour of giving to science a new weapon in the shape of a tube containing metallic filings or powder rather loosely packed between metal plugs, and of showing that when the pressure on the powder was adjusted such a tube may be a conductor of very high resistance, but that the electrical conductivity is enormously increased if an electric spark is made in its neighbourhood. ”

“ Being drilled and reamed parallel the plugs that fit them may be passed through them to any desirable distance, whereas the square plugs being taper must be set down home in their holes, necessitating the use of plugs of varying length, so that when in their places they may stand at varying heights from the table, and thus suit different heights of work. Whatever kind of holes are used it is obvious that they must be arranged in line both lengthways of the table and across it, so that they will not come in the way of the ribs r, which are placed beneath it to strengthen it. ”

“ The silver plugs exactly fill the aperture of the tube, and are connected to platinum wires sealed through the glass. The tube has a lateral glass tube fused into it, by which the exhaustion is made, which is afterwards sealed off, and this tube projects on the side of the wider portion of the gap between the silver plugs. The sensitive material consists of a mixture of metallic filings, five per cent, silver and ninety-five per cent, nickel, being carefully mixed and sifted to a certain standard fineness. ”

“ These plugs can be slid in and out of tube for adjustment, the gap between them being loosely filled with255 fine metal filings. The metal used varies, according to the operator's preference, the most generally adopted being pure nickel for both plugs and filings. Another mode of construction for purely experimental use is to merely cork the ends of the tube and pass the wires through these corks into the filings, ensuring, however, good contact between wires and filings. ”

“ The cord circuit is of the two-conductor type, the plugs being provided with tip and sleeve contacts, the tips being connected by one of the flexible conductors through the proper ringing and listening key springs, and the sleeve being likewise connected through the other flexible conductor and the other springs of the ringing and listening keys. ”

“ These conductors may be made of any metal, such as copper or iron wire, or strips of copper or iron, or of cords or twine, or other substances, gilt, silvered, or covered with any metal leaf, properly insulated in the ground, or through or beneath the water, or through the air, and by causing the electric or galvanic current to pass through the circuit, by means of any generator of electricity, to make use of the visible signs of the presence of electricity in any part of the said circuit, to communicate any intelligence from one place to another. ”

“ The earth either acts the part of a return wire, or else, by continually carrying off the electricity, allows the current to flow continuously along the single wire. We may compare the current carried along the complete wire circuit, to water circulating in a pipe extending continuously from a reservoir to a distance and back again to the reservoir. ”

“ Let the composition be put in, very little at a time, and well driven with a solid rammer and mallet. Fig. 59 represents the mould; the foot b fits the tube a; the tenon c fits the case; a wire, d, goes through 2 holes in the brass tube, and a hole through the foot; a nut, e, to keep the wire from jarring out, is made of a piece of indiarubber: make a hole through it, with a bradawl, and slip it on the wire; or, a screw-eye may be passed through and held with a leaden, or wooden nut. ”

“ Decreasing size of pipes is increasing resistance and decreases flow of water, so also introduction of resistance in an electrical circuit decreases current flow with a given voltage or pressure.
Wall. Jar sides and ends.
Washing. Removal of sediment from cells after taking out elements; usually accompanied by rinsing of groups, replacement of wood separators and renewal of electrolyte.
Watt. The commercial unit of electrical power, and is the product of voltage of circuit by amperes flowing. One ampere flowing under pressure of one volt represents one watt of power. ”

“ If a coherer be attached by a side wire to the gas pipes, and an electrophorous spark be given to either the gas pipes or the water pipes or even to the hot-water system in any other room of the [Pg 33] building, the coherer responds. It is surprising how far these impulses can be felt along an ordinary uninsulated wire or other conductor. ”

“ When the tube is exhausted of air, and its pointed end placed near the excited cylinder of an electrical machine, the point will appear illuminated with a star, and a weak light will be seen pervading the whole tube; but from the knobbed end of the wire, within the tube, a lucid pencil will issue, and the opposite knob will be illuminated with a star or round body of light, which, as well as the pencil of rays from the other knob, will be discernible among the other light which occupies the cavity of the tube. ”

“ From the Appearance of the Threads amongst which I rub the Tube, I can frequently judge, though the Spirit may be many Feet distant from them, whether or no it will fire; because when the Persons standing upon the Wax are made electrical enough to fire the Spirit, the Threads repel each other at their lower Parts, where they are not confin'd, to a considerable Distance, and this Distance is in Proportion as the Threads are made electrical. ”

“ Owing to the metallic connection established by these wires, the potential of A is always the same as the potential of a. Similarly B and b are at the same potential. Into the middle of each cylinder there is carried the discharge nozzle of a water pipe, and the flow of water is regulated by means of a stopcock in such manner that there shall be no continuous stream, but a succession of drops. ”

“ If the filings used are coarse, say turnings or borings, the tube approximates to a single coherer; if they are fine, it has a larger range of sensibility. In every case what these receivers feel are sudden jerks of current; smooth sinuous vibrations are ineffective. They seem to me to respond best to waves a few inches long, but doubtless that is determined chiefly by the dimensions of some conductor with which they happen to be associated. (Figs. 17 and 18.)
Fig. 18.— Early Form of Iron Borings Tube. ”