Specification of John Wallace : ships' safety hearth.

  • Wallace, John.
Date:
1857
Catalogue details

Licence: Public Domain Mark

Credit: Specification of John Wallace : ships' safety hearth. Source: Wellcome Collection.

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    Wallaces Improvements in the Safety Hearth. R is the oven which runs from side to side, having a door at each end, as shown in Figures 2 and 3; S, S, are two boilers, one of which is shown bi¬ section, and in plan, separately at Figure 12, together with a section of the steaming vessels T, but such steaming vessels being well understood, and forming 5 no part of my Invention, and as their shapes are clearly shown in the Figures of the Drawing, no further description will be necessary, a, a, are two boilers, w7hich are placed over the fire place and on the top or hot plate b, in which- there are two openings cut for the purpose of putting in a saucepan when the boilers are not on the top ; these openings are covered at other times with 10 the circular plates c ; one of the boilers a, a, is shown separately at Figure 13, having its steaming apparatus T at top; but when steaming is not required the covers are made to fit the boiler a, and the steaming apparatus may be removed; Figure 14 shows two plans at the bottom of the steaming appa¬ ratus T, d, d, d, d, being the openings formed in the corners for the steam to 15 pass through; and e, e, e, e, are the top to turn the steam downwards in the direction of the arrows. Figure 15 shows a plan of the boiler a having a perforated plate or strainer for taking out fish or other substances boiled in the boiler a. In Figures 1, 2, 3, 4, 5, and 6, the safety hearth is shown as placed on a 20 curved stand or frame, which forms a railway upon which the hearth can move from side to side in case of the heeling of the ship or vessel, and whereby the hearth will be kept in its perpendicular position; the construction of this frame will be clearly understood by an examination of Figure 16, in which Figure, as well as in the other Figures above named,/represents the frame or 25 rails on which the hearth is placed, the frame or rails/being strongly fixed to the deck or flooring of the ship or vessel by bolts or screws (as is shown in Figure 6); g, g, are friction rollers affixed to the part h of the framing, which is attached to the under side of the safety hearth; the form of this part h will be clearly understood by examining Figure 16, and also Figure 17, which is a 30 cross section, and Figure 18, which is a view of the under side of the parts h and the friction rollers g, g; the upper parts of the frame or rails/have pro¬ jecting edges i, i, see Figure 17, and the under parts j of h are turned inwards, and this prevents the safety hearth being thrown off the framing or rails/; h is a bar passing around the boilers a to retain them in their places; m, n, 35 Figure 4, are the flues passing from the fire to the chimney U, m being the flue under the boilers S, S, and n being the flue which passes over the over; these flues m and n are divided by an iron plate o. p is a damper which may be made to turn on its axis by the handle q, Figures 1 and 2, and retained in any position by the sliding catch r entering