Part 5 (1/2)

HOW FLAT STEEL POLIshi+NG IS DONE

Polishi+ng a regulator bar for a large , is only a heavy job of flat steel work, a little larger but no ulator for a sixteen-size watch We would ask permission here to say that really nice flat steel work is so which only a comparatively feorkmen can do, and, still, the process is quite silass slab 6” by 6” by ”; second, flat zinc piece 3” by 3” by ”; third, a piece of thick sheet brass 3” by 2” by 1/8”; and a bottle of Vienna lilass cut to the size given above The zinc slab is pure zinc planed dead flat, and the glass ground to a dead surface with another piece of plate glass and soone over with eulator bar, after careful filing and dressing up on the edges with an oilstone slip or a narrow emery buff, is finished as previously described We would add to the details already given a feords on polishi+ng the edges

[Illustration: Fig 47]

It is not necessary that the edges of steelwork, like the regulator bar _B_, Fig 47, should be polished to a flat surface; indeed, they look better to be nicely rounded Perhaps we can convey the idea better by referring to certain parts: say, spring to the regulator, shown at _D_, Fig 40, and also the hairspring stud _E_ The edges of these parts look best beveled in a rounded48]

[Illustration: Fig 49]

It is a little difficult to convey in words what isour s 48 and 49, which are transverse sections of _D_, Fig 50, on the line _f_ The edges of _D_, in Fig 48, are siood judges of _D_ as shown in Fig 49 aresuch edges, an ordinary jeweler's steel burnish can be used

[Illustration: Fig 50]

SMOOTHING AND POLIshi+NG

The idea in sloss without much attention to perfect form, inasmuch as it is the flat surface _d_ on top which produces the impression of fine finish If this is flat and brilliant, the rounded edges, like _g c_ can really have quite an inferior polish and still look well For producing the flat polish on the upper surface of the regulator bar _B_ and spring _D_, the flat surface _d_, Figs 48, 49, 51 and 52, we ulator bar to a plate of heavy brass, as shown at Fig 47, where _A_ represents the brass plate, and _B_ the regulator bar, arranged for grinding and polishi+ng flat

[Illustration: Fig 51]

[Illustration: Fig 52]

For attaching the regulator bar _B_ to the brass plate _A_, a good plan is to cement it fast with lathe wax; but a better plan is toabout 1/8” thick, and secure the two together with three or four little catches of soft solder It is to be understood the edges of the regulator bar or the regulator spring are polished, and all that rerind and polish the flat face

Two pieces _a a_ of the saulator bar are placed as shown and attached to _A_ to prevent rocking After _B_ is securely attached to _A_, the regulator should be coated with shellac dissolved in alcohol and well dried The object of this shellac coating is to keep the angles for of the face and side clean in the process of grinding with oilstone dust and oil The face of the regulator is now placed on the ground glass after s it with oil and oilstone dust It requires but a very slight coating to do the work

The grinding is continued until the required surface is dead flat, after which the work is washed with soap and water and the shellac dissolved aith alcohol The final polish is obtained on the zinc lap with Vienna li the regulator to the plate _A_, the alcohol used with the Vienna lime dissolves the cement and smears the steel Dia when the regulator bar is cemented to the plate _A_

KNOWLEDGE THAT IS MOST ESSENTIAL

_The knowledgewatchet the watches he has to repair in a shape to give satisfaction to his customers_ No one will dispute the truth of the above italicised statement It is only e seek to have lie should consist of, that disagreement occurs

One workman who has read Grossto their ideas, all such lever watches as we are now dealing with should have club-tooth escaperees lever and pallet action, with one and one-half degrees lock and one and one-half degrees drop Another work based chiefly on what he had read as stated by some author Now the facts of the situation are that lever escapements vary ascircular pallets and another using pallets with equidistant lockings

WHAT A WORKMAN SHOULD KNOW TO REPAIR A WATCH

One escapement maker will divide the iive an excess to the tooth Nohile these ree in a theoretical sense, still, for such ”knos” as count in a workshop, they are of but trivial importance in practice

We propose to deal in detail with the theoretical consideration of ”thick” and ”thin” pallets, and dwell exhaustively on circular pallets and those with equidistant locking faces; but before we do so ish to i able to free themselves of the idea that all lever escapeid rules of any dictum

EDUCATE THE EYE TO JUDGE OF ANGULAR AS WELL AS LINEAR EXTENT