US185311A - Improvement in paint-staffs for millstones - Google Patents

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Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F24—HEATING; RANGES; VENTILATING
  • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
  • F24F7/00—Ventilation
  • F24F7/007—Ventilation with forced flow
  • F24F7/013—Ventilation with forced flow using wall or window fans, displacing air through the wall or window

Definitions

• My improvement relates to an instrument for indicating the high places on the face of a millstone.
• the ordinary staff is of four-sided prismatic form.
• My improved stafl' has'a central semicircular portion and straight ends, which are in line with each other.
• Figure 1 is a perspective view.
• Fig. 2 is a top View.
• ' A is the curved part, which maybe made in the arc of a circle, extending to one hundred and eighty degrees, as shown, or more or less than a semicircle, or the curve may be elliptical. I make the staff of about equal crosssection with the ordinary straight staff now in nsesay, four inches by four inches-but do not confine myself to any exact size.
• the central parts a of the curved portion A may be made somewhat broader than the rest, so as to give a somewhat more extended paintsurface upon the face of the stone.
• B B are the ends, which extend outward in a radial direction from the ends of portion A, and whose lower faces are exactly flush with the lower face of portion A.
• the ends B are intended for hearing only, to prevent the ends a a of the portion A from descending into low places in the face of the stone.
• This staff is used like the ordinary paintstafl'.
• the lower face only of the part A is painted.
• the faces of partsB are not painted, as they are not intended to mark the stone, but merely to act as bearings, as aforesaid.
• the bearing ends B B are always at the outside of the grinding -face of the stone, so that the ends a/ a would not descend into low places, even if the stone were out down in rings by hard blocks in the other stone, or what is called ground into rings!
• b b are grooves running around the sides of the staff, and forming a hold for the ends of the thumb and fingers in the use of a staff.
• the paintstaff composed of a curved portion, A, and end bearings B B, extending outwardly therefrom in any direction, substantially as shown and described.

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• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Processing Of Stones Or Stones Resemblance Materials (AREA)
• Application Of Or Painting With Fluid Materials (AREA)

Description

Publications (1)

Family

ID=2254716

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Cited By (1)

• 0
  • US US185311D patent/US185311A/en not_active Expired - Lifetime

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