Found 1 items, similar to Differential thermometer.
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Definition: Differential thermometer
, a. [Cf. F. diff['e]rentiel.]
1. Relating to or indicating a difference; creating a
difference; discriminating; special; as, differential
characteristics; differential duties; a differential rate.
For whom he produced differential favors. --Motley.
2. (Math.) Of or pertaining to a differential, or to
3. (Mech.) Relating to differences of motion or leverage;
producing effects by such differences; said of mechanism.
. (Math.) See under Calculus
, the limit of the ratio of the
increment of a function of a variable to the increment of
the variable itself, when these increments are made
, a form of slip coupling used in
light machinery to regulate at pleasure the velocity of
the connected shaft.
(Polit. Econ.), duties which are not
imposed equally upon the same products imported from
(Elec.), a galvanometer having
two coils or circuits, usually equal, through which
currents passing in opposite directions are measured by
the difference of their effect upon the needle.
, a train of toothed wheels, usually an
epicyclic train, so arranged as to constitute a
, a mechanism in which a simple
differential combination produces such a change of motion
or force as would, with ordinary compound arrangements,
require a considerable train of parts. It is used for
overcoming great resistance or producing very slow or very
(a) A portable hoisting apparatus, the same in principle
as the differential windlass.
(b) A hoisting pulley to which power is applied through a
, a compound screw by which a motion is
produced equal to the difference of the motions of the
, a thermometer usually with a
U-shaped tube terminating in two air bulbs, and containing
a colored liquid, used for indicating the difference
between the temperatures to which the two bulbs are
exposed, by the change of position of the colored fluid,
in consequence of the different expansions of the air in
the bulbs. A graduated scale is attached to one leg of the
, or Chinese windlass
, a windlass
whose barrel has two parts of different diameters. The
hoisting rope winds upon one part as it unwinds from the
other, and a pulley sustaining the weight to be lifted
hangs in the bight of the rope. It is an ancient example
of a differential motion.