Steady Pins
Pins used to secure two pieces of metal in relative positions, as a bridge and plate.
Only in American Watchmaker and Jeweler
Single-source entries: S (150)
These 11 listings are so strange that each appears in only one of the 7 encyclopedias we compared. They include such classics as Steady Pins, Steam, Steam Gauge.
Steady-pin
An extra-long box-pin or slide, for maintaining a true vertical position when a cope with a deep straight lift is being raised. Also, a long, straight attachment to a pattern, or card of patterns, that extends some distance below in order to assure a true horizontal and vertical position during the process of drawing from the sand. The pin that is fixed on a pattern directly over where it is intended that a core shall protrude, to form a hole through the cope into which the top end may be guided, and thus keep it in a horizontal position, as well as permitting a vent to be carried off safely, is also termed a steady-pin. The wood or iron projections for guiding the halves of patterns and holding them to match are often called by that name. See PIN; FLASK.
Only in The Encyclopedia of Founding
Steam
stem, a vapor of water. Under ordinary atmospheric conditions water is changed into steam at a temperature of 100 deg. C or 212 deg. F. If water be heated so as to generate steam in a closed receptacle, as in a boiler, the steam struggles with the strength of a giant to escape. The more steam is generated, the greater the bursting force. Advantage has been taken of this fact to apply steam pressure to the movable pistons of engines in order to perform work. Making allowance for loss by cold and friction, it is estimated that the work done by from five to twenty-five pounds of steam passing through an engine in an hour is equal to that of a horse. Where water and cheap fuel are at hand, steam power is considered more trustworthy and not much more expensive than falling water. The statisticians of the United States census estimate that at the present time (1909) the steam used in manufactories is doing an amount of work that would require the employment of 8,742,416 horses. The work done by water power, which ranks next, amounts to an equivalent of only 1,727,258 horses. See Steam Engine
Only in Aiton's Encyclopedia
Steam Gauge
an instrument at tached to a boiler to indicate the pressure of steam. There are many varieties. The oldest and simplest consists of a bent tube partially filled with mercury, one end of which springs from the boiler, so that the steam rising in the tube forces up the mercury in proportion to the amount of pressure.
Only in Collier's New Encyclopedia
Steam Whistle
a sounding device connected with the boiler of a steam engine, either stationary, locomotive, or marine, for the purpose of announcing the hours of work, signaling, etc. In the ordinary locomotive steam whistle the foot is bolted onto the fire box, has an opening for the admission of steam, and is provided with a cock, by turning which steam is permitted to rush into the hollow piece, which is provided with holes around its lower and narrower portion, through which the steam rushes into the cavity of the cup, and, passing out through the narrow annular opening, impinges against the rim of the bell, causing a shrill, piercing sound. The calliope is a series of such whistles tuned to a scale and operated by keys. apparatus in which rotary motion is imparted to the winding axle from the piston rod of a steam engine, directly or intermediately, through bevel gearing. The former is more rapid; the latter affords greater power. Specially used for loading and unloading ships.
Only in Collier's New Encyclopedia
Steam Winch
a form of hoisting is separated. When melted it resembles wax.
Only in Collier's New Encyclopedia
Steamer
or RACE-HORSE DUCK (Micropterus brachypterus), a species of marine duck from 35 to 40 inches in length, distinguished by its small, short wings, and the swiftness with which it paddles over the surface of the water. It is found in Patagonia and the Falkland Islands.
Only in Collier's New Encyclopedia
Stearates
compounds of stearic acid with the alkalies and metals. They have the consistence of hard soaps and plasters, and are mostly insoluble in water. Stearate of potassium, C18H35 KO2, separates on cooling from a solution of one part stearic acid and one part potassic hydrate in 10 parts of water. It forms shining delicate needles, having a faint alkaline taste, and dissolves in 6.7 parts boiling alcohol and 25 parts boiling water. Acid stearate of potassium, C18H35KO 2-C18H36O2, obtained by decomposing the neutral salt with 1,000 parts of water. When dried and dissolved in alcohol it separates in silvery scales inodorous and soft to the touch. It dissolves in four parts of boiling absolute alcohol.
Only in Collier's New Encyclopedia
Stearic Acid
in chemistry C18H35O. OH, an acid discovered by Chevreul, and found as a frequent constituent of fats derived from the animal and vegetable kingdoms, and especially abundant as a tristearin in beef and mutton suet. It may be obtained by saponifying the fat with soda lye, decomposing with sulphuric acid, dissolving the fatty acids in alcohol, and repeatedly crystallizing, the first portions of the fatty acid only being taken. When pure it crystallizes from alcohol in nacreous laminæ or needles, needles, is tasteless and inodorous, and has a distinct acid reaction. Its specific gravity is nearly that of water, it melts at 69- 69.2°, distills in a vacuum without alteration, and is sparingly soluble in alcohol, more so in ether and benzene.
Only in Collier's New Encyclopedia
Stearin
in chemistry, a compound of stearic acid and glycerin. Stearin is the chief component of suet, tallow, in short of the harder fats. When freed from fat and crystallized, stearin takes the form of white, pearly scales, soft to the touch but not greasy. Pure stearin is tasteless and odorless. It is insoluble in water but is soluble in alcohol and ether. It is used in the manufacture of certain chewing gums. Stearin may be separated into stearic acid and glycerin. Stearic acid, more or less pure, is the material of wax candles. An impure stearin may be obtained from lard by pressing out the oil. To properly comprehend the subject, the reader should disabuse his mind of any notion that an acid is necessarily a liquid.
Only in Aiton's Encyclopedia
Stearine
or STEARIN, in chemistry, C57H11006, the chief ingredient of suet and tallow, or the harder ingredient of animal fats, oleine being the softer one. It is obtained from mutton suet by repeated solution in ether and crystallization. It may also be obtained by pressing tallow between hot plates, and afterward dissolving in hot ether, which on cooling deposits the stearine. It has a pearly luster, is soft to the touch, but not greasy. It is insoluble in water, but soluble in hot alcohol and ether. When treated with superheated steam it is separated into stearic acid and glycerin, and when boiled with alkalies is saponified, that is, the stearic acid combines with the alkali, forming soap, and glycerin
Only in Collier's New Encyclopedia