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民國31年,美國海軍,漢米爾頓22型,兩日(56 小時)航海天文鐘,序號4636號《Black Water Museum Collections | 黑水博物館館藏》

1942, U.S. NAVY, Hamilton Model 22 chronometer deck watch, SN:4636

民國31年,美國海軍,漢米爾頓22型,兩日(56 小時)航海天文鐘,序號4636號《Black Water Museum Collections | 黑水博物館館藏》


1942, U.S. NAVY, Hamilton Model 22 chronometer deck watch, SN:4636 民國31年,美國海軍,漢米爾頓22型,兩日(56 小時)航海天文鐘,序號4636號《Black Water Museum Collections | 黑水博物館館藏》
1942, U.S. NAVY, Hamilton Model 22 chronometer deck watch, SN:4636 民國31年,美國海軍,漢米爾頓22型,兩日(56 小時)航海天文鐘,序號4636號《Black Water Museum Collections | 黑水博物館館藏》




IMPORTANT

THIS HAMILTON MOUNTED CHRONOMETER WATCH (MODEL 22) is protected with a Safety Setting Device. To Set The Watch press the locking pin (in slot of first screw to the left of winding crown) in as far as it will go, pull out stem, release locking pin, and set watch in regular manner. Then push stem back into winding position.


IMPORTANT THIS HAMILTON MOUNTED CHRONOMETER WATCH (MODEL 22) is protected with a Safety Setting Device. To Set The Watch press the locking pin (in slot of first screw to the left of winding crown) in as far as it will go, pull out stem, release locking pin, and set watch in regular manner. Then push stem back into winding position.
IMPORTANT THIS HAMILTON MOUNTED CHRONOMETER WATCH (MODEL 22) is protected with a Safety Setting Device. To Set The Watch press the locking pin (in slot of first screw to the left of winding crown) in as far as it will go, pull out stem, release locking pin, and set watch in regular manner. Then push stem back into winding position.





MTD. WATCH

BUREAU OF SHIPS

U. S. NAVY

4636-1942



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SECTION I

INTRODUCTION


This handbook contains descriptive data and instructions for the operation, maintenance, repair and overhaul of the Hamilton 35-Size Chronometer Watch, manufactured (when cased as a watch) to Bureau of Ships specification 18-W-6. The corresponding Standard Stock Catalog number is 18-W-121. When mounted in gimbals, the applicable specification is 18-W-7. The Standard Stock Catalog number in this instance is 18-W-126.


This watch was designed and is manufactured by the Hamilton Watch Company, Lancaster, Pa., U. S. A. The manufacturer's assembly part number, for the instrument cased as a watch, and complete with padded box and carrying case, is 37124. This assembly is being withdrawn from service. The assembly part number, when mounted in gimbals, is 37125, which number includes the instrument itself, together with mounting box and carrying case. Since the carrying case of this assembly is discontinued as an item of general issue, part number 37625, which has been assigned to include only the instrument in its mounting box, covers the combination which will be found in general use.


The back of the watch case is engraved in the following manner:


BUREAU OF SHIPS

U. S. NAVY

(N) (serial number)

CHRONOMETER WATCH


The chronometer watch which is mounted in gimbals is engraved on the bottom of the case as follows:


MTD. WATCH

BUREAU OF SHIPS

U. S. NAVY

(N) (serial number)


Chronometer watches are normally allotted to three basic ship classes in the U. S. Navy for purposes of navigation. Minor fighting ships (destroyers through submarines) are allotted one or more gimbaled chronometer watches and one or more chronometers. The chronometer watches are to serve as an additional check upon the readings of the chronometers. For safety, these instruments are located in different stations aboard ship, according to the discretion of the ship's Commanding Officer. Seagoing ships (such as tenders, supply ships and hospital ships) and nonseagoing ships (like patrol craft, yard craft and LST) are provided with chronometer watches, and may be allotted chronometers.


For the exact navigating timepiece allowance on a particular type of vessel, see the latest allowance list.


Purpose

The primary objective of this publication is to provide a means for uniform control of re- pair procedures for the Hamilton chronome- ter watch by giving instruction in standardized servicing practices. It is intended that every instrument on which work is done will be com- pletely reconditioned and that damaged or worn parts will be replaced rather than repaired. The methods and techniques to be used employ Hamilton special service tools. (BWM)See Section XIII "Service Tools."


Portions of certain sections in the book are. prepared mainly for purposes of familiarization and are useful even to operating person- nel or others who have no watchmaking skill. These sections include Description, Prepara- tion for Use, Operation, and Storage and Shipment. Other sections, like Disassembly, Cleaning, Inspection and Repair, Reassembly, and Test and Adjustment, are of principal u- tility to skilled workmen. These sections are built one upon another, the supposition being that increased knowledge and skill are required for the work of each succeeding section.


CAUTION

Adjustment, repair or assembly of a chronometer watch should be undertaken only by qualified, experienced personnel skilled in the watchmaker's trade. This manual provides ade- quate instructions for the guidance of such personnel.



HAMILTON 35-SIZE CHRONOMETER WATCH


SECTION II

DESCRIPTION


The Hamilton chronometer watch has a 35- size, 21-jewel movement, known as manufacturer's model 22, part number 37117. Originally, this instrument was furnished in two styles of mounting-mounted in chronometer- type gimbals, hereafter called "gimbal watch," and cased as a watch, hereafter called "non- gimbal watch." The non-gimbal watch is being withdrawn from service and will become an item of special issue. For purposes of record, exploded views of both these mounting styles are shown in Section XI, Figs. 49 and 50, and an account of each is given in this section. The major components of the movement itself dial, plates and bridges, barrel, train - and escapement with balance and hairspring assembly will be described in succeeding paragraphs.


NOTE

Carrying cases, formerly used for these instruments in their boxes, are illust, ated in the exploded views of Section XI, Figs. 49 and 50. They consisted of hinged-lid, brass-fitted mahogany boxes, padded on the inside and equipped with leather carrying straps. Few of these carrying cases are still in use. A part of their utility is now served by the newly-developed shipping container, Illustrated in Sec- tion X, Fig. 47.


Gimbal Watch

The Hamilton 35-Size Gimbal Chronometer Watch (Hamilton Part No. 37625) is furnished as shown in Fig. 1.


The mounting box, also shown in Fig. 1, is of mahogany, equipped with two hinged covers and designed to support the gimbal chronometer watch. The upper lid lifts on its hinges to allow the watch to be read through the glass top of the second lid which is kept closed ex- cept when winding and setting. Latches are provided to fasten the two lids when they are in closed position.


The gimbal mount, contained within the mounting box, consists of a brass gimbal ring pivoted, from the sides of the box, at two points 180 degrees apart. The brass case of the watch movement, in turn, is pivoted from the brass gimbal ring at two points, 180 degrees apart and 90 degrees away from the two pivots holding the gimbal ring to the mounting box. As a result of this construction, the mounting box may be tilted in any direction, and the watch movement will tend to remain level thus reducing positional error. The gimbal mount is provided with a latch which allows the watch movement to be locked in po- sition. For further details, see exploded view of case and movement, Section XI, Fig. 49.


The brass chronometer watch case assembly consists of a bezel with crystal, case ring, and a specially weighted case bottom. The case ring is provided with two adjusting straps that allow the case to be shifted in relation to the gimbal ring. The dustproof winding stem and the safety setting push pin complete the case assembly.


Non-Gimbal Watch

In this style of mounting, the Hamilton 35- size chronometer watch movement is fitted in a specially designed watch-type case (Hamilton Part No. 37124). See Section XI, Fig. 50.


A padded box with window in the lid is sup- plied with the watch, and is also shown in the illustration. Inside is the nest for the instru- ment in its metal case, where it is held in po- sition by the padding of the box and the padding on the underside of the lid.


The base metal watch-type case is provid- ed with a crown guard, dustproof winding stem, and a spring-loaded push pin to actuate the safety setting mechanism.


As indicated in the opening paragraphs of this section, the non-gimbal style of mount is being withdrawn from service and the move- ments placed in the gimbal-type mounts.


Dial

The dial has black arabic numerals, grad- uations, and letters on a silver white back- ground. The hour and minute scale is divided into 60 graduations and marked from 1 to 12 hours. A wind indicator scale marked "UP- DOWN" is located below the 12 hour mark and



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