This is an attractive and very well functioning barometer with the additional interest in the history of forecasting. Short & Mason’s Weather Indicator looks to have been produced in relatively small numbers. Prior to 1925 when the BBC commenced broadcasting weather forecasts, numerous companies and individuals applied themselves to designing better and more accurate means of forecasting the weather, the most well-known being products from Negretti & Zambra, including the Weather Watch, Weather Foreteller, and various brass and celluloid forecasters etc. This enables the pointer to be mapped precisely to the setting point and later observations then interpreted. The entire movement rotates within the case, caused by sliding the screw headed adjuster. Extension post and suspension ring.Ĭomments: A scarce early precursor to Short & Mason’s Stormoguide weather forecaster, patented in the early 1930s. The lower case with semi-circular slot, sliding screw headed adjuster, arrow set true pressure indicator, the verso with port for calibration screw. Enclosed within a high copper content brass drum form case with flared mouth. Weather Indicator having 4¾” printed alloy dial marked “Falling” or “Rising” with associated weather prognostications, barometric scale calibrated in inches of mercury with a range from 27½” to 31½”, top centre marked “Setting Point,” the lower part annotated “Hutchinson’s Testing Apparatus Ltd, 11, Tothill Street, Westminster, S.W.” Further instructions printed at bottom along with “Patent No 8519-11.” Blued steel pointer, all set beneath a bevelled glass.Ģ.5” capsule driven movement tensioned on a C spring, raised on a cut steel chassis. No maintenance or adjustments are required.This is a rare brass cased Weather Indicator aneroid barometer by Short & Mason, retailed by Hutchinson’s Testing Apparatus Ltd, London. Temperature reading is assured by a Bimetal Thermometer (dial type). With a screwdriver the regulating slot ca be reached at the depth of about 5cm (2”). Hygrometer reading may be adjusted through the center hole in the bottom of the instrument. Comfortable conditions are obtained with a relative humidity between 40 and 70%. Therefore, remember that this instrument indicates the humidity of room atmosphere which has no relation to the outdoor humidity readings announce on weather reports. While indoor and outdoor barometric pressure are identical, this is not true of the relative humidity.
The Hygrometer or Humidity Indicator is designed for indoor use.
#Brass weather indicator driver
A small screw driver or the point of a knife blade may be used to turn this screw. The indicating hand of the barometer may be adjusted by turning the set screw in a small opening at the bottom of the instrument. In the event that your barometer does not read exactly like the reading obtained from your local weather forecast, the instrument should be adjusted. Readings obtained from your barometer indicate weather conditions that may prevail within the next 24 to 48 hours, providing wind direction and velocity remain the same as when readings were obtained. The correct sea level reading can be obtained from your Weather Bureau or television weather forecasts. For accurate weather predictions, it is highly important that your barometer is adjusted to sea level. If the reading is to the left you have a falling barometer, which usually means a change for the worse. If it moves to the right you have a rising barometer which usually means a change for the better or continued good weather. The normal operating range of movement for your barometer indicating hand is from 29.5 to 30.5 inches of mercury (1000 – 1025 hPa). Your barometer indicating hand will never move all the way to Rain to predict rain or to Stormy to predict inclement weather. Silver-colored, Inch & ☏ (US-Version) ĭisregard the words Stormy, Rain, Change, Fair and Dry as therse are only traditional zones on a barometer dial. Find many great new & used options and get the best deals for Cape Cod Wind Speed Indicator Weather Instrument Coastal Brass at the best online prices at.Brass, acrylic cover, wooden base mahogany coloured.An acrylic cone shelters the open technique. All this sits on a mahogany painted wooden base. The scales are made of brass and are located on top of each other, every single one on an independently rotating roll. This modern Barigo weather station with barometer, hygrometer and thermometer displays air pressure, temperature and humidity in an extraordinary design. 3026 with Barometer, Hygrometer & Thermometer, ☏/Inch (US-Version )
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