Grubb's duplex micrometer is described in the 9th edition of the Encyclopaedia Britannica.
The coils of the electromagnets are differentially wound with silk-covered wire, 4 mils (= 004 inch) in diameter, to a total resistance of 400 ohms. This differential winding enables the instrument to be used for " duplex " working, but the connexions of the wires to the terminal screws are such that the relay can be used for ordinary single working.
Duplex telegraphy consists in the simultaneous transmission of two messages, one in each direction, over the same wire.
The first to introduce a really good practical system of duplex telegraphy, in which this difficulty was sufficiently overcome for land line purposes, was J.
In order that the line between two stations may be worked on the duplex system it is essential that the receiving instrument shall not be acted on by the outgoing currents, but shall respond to incoming currents.
- Duplex Working: differential method.
- Duplex Working: bridge method.
In the ordinary methods, a differentially wound receiving instrument was used, one coil being connected with the cable Company and the various Atlantic cables, are worked duplex on method of duplexing a cable was described by Lord Muirhead's plan.
Four years later Varley patented his artificial cable, which was the first near approach to a successful solution of the duplex problem on the principle now adopted.
The cable is supposed to be worked duplex; but, if 5, C1, C2, and AC are removed and the key connected directly with C3, the arrangement for simplex working is obtained.
For duplex working a " magnetic bridge " is used.
As with other duplex systems it is possible to obtain several approximately correct adjustments with the bridge and its accessories, but only one gives a true balance, and careful experiment is required to make sure that this is obtained.
The advantage of using the magnetic bridge duplex method is that the maximum current is sent to line or cable, and the receiving system benefits accordingly.
In 1896 it was arranged to lay two new cables to France and one (for duplex working) to Germany.
Quaternions afford an example of a quadruple algebra of this kind; ordinary algebra is a special case of a duplex linear algebra.
The remarkable discovery of the dual nature of the nervous system, of its duplex development as a lower and upper system of "neurons," has shed much light upon the problems of practical medicine, but this construction is described under Brain; Neuropathology; Muscle And Nerve, &C.
Typically they are steam pumps, the steam and water cylinders being set tandem on the same bed frame, generally without fly-wheel or other rotary parts; they may be single cylinder or duplex, simple, compound or triple expansion, and having a higher speed of stroke are smaller in all their parts than Cornish pumps.
If the bishop rejects the clerk within that time he is liable to a duplex querela in the ecclesiastical courts, or to a quare impedit in the common law courts, and the bishop must then certify the reasons of his refusal.
- Rotifera are unisexual, with the sexes dimorphic. The ovary is, as in many Platyhelminthes, duplex; one part, the germary, being an organ for the production by cell multiplication of the germ-cells or eggs.
Duplex has hose-in-hose flowers.
In the duplex process the conversion of the cast iron into steel is begun in the Bessemer converter and finished in the openhearth furnace.
Looking at the duplex process in another way, the preliminary desilicidizing in the Bessemer converter should certainly be an advantage; but whether it is more profitable to give this treatment in the converter than in the mixer remains to be seen.
The act also gives to both patron and presentee an alternative mode of appeal against a bishop's refusal to institute or admit, except on a ground of doctrine or ritual, to a court composed of an archbishop of the province and a judge of the High Court nominated for that purpose by the lord chancellor, a course which, however, bars resort being had to the ordinary suits of duplex querela or action of quare impedit.
This type of apparatus has been replaced in Japan by what are called duplex pendulum seismographs.
In 1875 he invented the duplex plan for working Atlantic cables described in 26.518.
His festival is observed on that anniversary by the entire Roman Catholic Church as a semi-duplex, and by the Spanish Catholics as a duplex of the first class with an octave.
He died on January 8, 1465, was canonized by Pope Alexander VIII., his festival (semi-duplex) being fixed by Innocent XII.
In 1455, his festival (duplex) being observed on the 5th of April.
In his commentary on the De Interpretatione, St Thomas, after citing from the De Anima Aristotle's " duplex operatio intellectus," said, " Additur autem et tertia operatio, scilicet ratiocinandi," and concluded that, since logic is a rational science (rationalis scientia), its consideration must be directed to all these operations of reason.
It was due to their specific qualities, and to the diverse circumstances of their external development, that the re-birth of Europe took this form of duplex action on the lines of intellectual and moral progress, followed by reaction against mental freedom.
Its duplex character, and the fact that the electricity produced by rubbing glass and vitreous substances was different from that produced by rubbing sealing-wax and resinous substances, seemed to necessitate the assumption of two kinds of electric fluid; hence there arose the conception of positive and negative electricity, and the two-fluid theory came into existence.
Rvdimenta (1621); Antiquae linguae Britannicae dictionarium duplex (1632); Edward Lhuyd, Archaeologia Britannica (1707); W.
Simplex and duplex obligatio were the old names for what are now more commonly called a single and a double or conditional bond.
Plicare, plectere, to plait, pleat, weave, and in the suffixes of such words as borXauws, duplex, double, simplex, &c. Similarly the termination "-fold" is added to numbers implying "so many," e.g.