Furnaces, flatting mills, swagers, blowpipes, burners, soldering appliances, tools, tooth brushes, dentifrices, books, and sundries / Claudius Ash, Sons & Co., Ltd.

Claudius Ash & Sons

Date:: 1908

Credit: Furnaces, flatting mills, swagers, blowpipes, burners, soldering appliances, tools, tooth brushes, dentifrices, books, and sundries / Claudius Ash, Sons & Co., Ltd. Source: Wellcome Collection.

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$THE PEARSALL DUBLIN SAND-MOULDING FLASK. INVENTED BY Mr. W. BOOTH PEARSALL, F.R.C.S.I. (See pages 76-79 of his book on “ Mechanical Practice in Dentistry.”) There is no form of Sand-Moulding Flask for dental work which gives so much satisfac- tion in use as Mr. Pearsall’s. Mr. R. P. Lennox, of Cambridge, who has employed it for some years, says: ‘‘ When this flask is used in casting a zinc die, a strong cone is formed at the back of the die, from which these advantages follow :— “The plaster model need not be more than one inch deep at the heel, the zinc can be readily grasped in a vice and otherwise readily handled, and it never cracks under the hammer. With this die and a counter made as above described ”—see page 5 Lennox’s Work—* perfect accuracy in directing the blows is obtained, and the life of the counter is much prolonged, so much so that I find one zinc die, one lead, and one tin counter sufficient for all purposes.” As made the Flask consists of— Two Moulding Plates (Fig. 1) of the same diameter, but with cone-shaped aper- tures (A, Fig. 3) of different sizes, the larger suited to very large jaws. Two Sand Rings (B, Figs. 2, 3), one deep and one shallow, which fit on the top of the Moulding Plates (see Fig. 2). Some prefer a deep, others a shallow ring; both sizes are useful in the workroom. Two Counter-Die Rings (A, Fig. 4), one large and one small, with which either a large or a small lead, as may be desired, can be obtained. The six parts here enumerated form a Double outfit, which it is desirable to have, but for the convenience of purchasers we have priced them as Single outfits ; any of the parts can be had separately. Single Outfit, consisting of— s. d. Moulding Plate with small aperture rae Sand Ring, shallow . : 2 0 Counter-Die Ring, small peng Complete . 5 0 Single Outfit, consisting of— Peete, & Moulding Plate with large aperture paren Sand Ring, deep : 3.0 Counter-Die Ring, large 2 0 Complete . (oe! Parts separately : & 6d. Moulding Plate with large aperture . . . (Fig.1) 2 0 iy ak ag EOL ra Sa) Rss en pie Sand. Ring, deep i> Siete. de teenie tees) 2 ey en ba shallow 0s 20y 7 bof: Be Aer oes ee) ea Counter-Die Ring; Jargey.\ j. (2e,.0 Fe es ee 0 ie 5 poBEOGlLY. 4) Bee a) ae emma, ea lt Full. Descriptive Circular sent on application.$