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Publication numberUS510897 A
Publication typeGrant
Publication dateDec 19, 1893
Filing dateMar 17, 1893
Publication numberUS 510897 A, US 510897A, US-A-510897, US510897 A, US510897A
InventorsWilliam G. Crook
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Watchmaker s tool
US 510897 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

(No Model.)


No. 510,897. Patentd Dec. 19, 1893.





SPECIFICATION forming part Of Letters Patent No. 510,897, dated December 19, 1893.

Application filed March 1'7, 1393. Serial No. 466 474. (No model.)

To all whom it may concern.-

Be it known that I, WILLIAM G. ORooK, a citizen of the United States, residing at Nelsonville, in the county of Athens and State of Ohio, have invented a certain new and useful Improvement in Jewelers Tools, of which the following is a specification.

My invention relates to the improvement of watchmakers tools and has particular relation to tools adapted for the handling of the hands of a watch.

The objects of my invention are to provide a simple, reliable and convenient tool which will greatly facilitate the detaching and handling of the hour, minute and second hands of a watch; to admit of said toolbeing so adjusted as to facilitate its use in connection with watches of various sizes and to otherwise produce in a neat and inexpensive forma desirable tool for jewelers or watch makers. These obj ectsI accomplish in the mannerillustrated in the accompanying drawings, in which- Figure 1 is a side elevation of my improved tool. Fig. 2 is a similar view of the head or jaws of the same showing the latter closed inward. Fig. Sis aview at right angles from that shown in Fig. 1. Fig. 4 is an enlarged sectional view on line a: a; of Fig. 1. Fig. 5 is an enlarged detail view in elevation of the plunger showing a portion of the parts connected therewith in section. Fig. 6 is a detail view in perspective of the lifting or clamping frame and Fig. 7 is a plan view of the jaw portion of my improved tool.

Similarletters refer to similar parts throughout the several views.

A andA' representthe two oppositelycurved arms of my improved tool and a the outwardly bowed handle portions thereof. Within a slotted opening a in the head of the arm ais pivoted the corresponding portion of the arm a, the latter also being provided with a slotted head opening a. In producing this pivotal connection I employ a transverse pivot pin 1), the latter having a smaller spindle extension at each end as indicated at b. These spindle ends of the pivot pin enter as shown, socketsb which are formed in the inner ends of short connecting pivot screws b one of the latter serving to pivotally connect corresponding sides of the respective heads of the tool sections a a. As shown in the drawings these portion with an inwardly curved clamping jaw, said jaws being indicated respectively at d and d. The outer ends of these jaws which are designed to be clamped toward each other, are as indicated at 01 beveled to form sharp or thin edges, the outer sides of said edge portions being flattened as shown, and each of said sharpened edges having formed centrally therein a rounded notch e. To the outer side of the jaw cl near the base thereof I affix the base of a vertical claw tooth f. As shown in the drawings the base of this claw tooth f is thickened inwardly thus separating the upwardly extending and thinner portion of said tooth .from the jaw d. This upwardly extending portion of said tooth is bifurcated to form prongs.

it represents an oblong catch or lifting frame which consists as shown of two parallel bars it connected by upturned end pieces 2' and 7?. As shown in the drawings, the jaws d d are inserted through the frame h and the upturned end i of said frame is secured by a screw or otherwise to the outer side of the jaw ct. This upturned end portion 2' of said lifting frame has its upper and thinner portion notched centrally or bifurcated to form two separated legs in. The opposite end 2' of the frame it which as shown projects beyond the jaw d normally abuts against the outer side of the tooth f. This frame end portion 1. is also bifurcated to form therein separated prongs or blades '5 the latter having but slight thickness and the inner edge of. each of said prongs preferably presenting a double scallop as shown.

m representsa central plunger rod, Wh'idh as shown in'the drawings, passes downward between the side arms h of the frame h through the opening a in the pivot pin 1) and terminates in ascrew threaded lower end portion m at a point midway between the bowed handles a Upon the screw m is screwed an internally threaded split tube m the latter having its upper portion externally threaded and asuitable thumb nut m on said threaded portion. The lower end of the tubular piece m is formed solid as shown at m and to opposite sides of said solid portion is jointedly connected the inner ends of toggle arms '12,. These toggle arms which extend outwardly and downwardly have their outer ends fulcrumed in suitable bifurcated lugs 0 which project from opposite points on the inner sides of the handle portions a These handle portions a are normally pressed outward away from each other by the action of a bowed spring strip 0 the ends of which are connected with pins 0 which project inwardly from the handles a at oppositepoints.

Upon the upper or outer end of the rod m I provide a smaller pin extension 13. Immediately below this pin extension 10 I provide the rod 1% with screw threads 12'. p represents a thumb piece which is provided with a tubular portion or hub 19 the latter being internally threaded and adapted as shown, to be screwed upon the portion 19 of the rod on. The upper portion of the hub 19 is as shown, shaped to form a smaller neck portion qthe latter loosely surrounding the pin extension 1).

In order to untilize my improved tool for the purpose of lifting the hour hand of a watch from its post, the tool is so supported that by pressing inward upon the handles a the sharpened edges (1 of the jaws d d will catch under the inner end of the hand, the post being embraced by the toothed edges of said jaws. In this operation of the tool it will be seen that not only are the jaws forced toward each other but the plunger rod is driven outward until the end of the neck q of the hub 19 rests against the outer end of the cannon staff. In case the thumb piece 19 is screwed inward upon the plunger rod until the pin extension 19 of said rod projects outward as shown in the drawings through the neck (1 it will be seen that said pin 10 will bear directly upon the cannon stafi instead of the neck g. It will thus be seen that not only will a bearing contact take place between the cannon stat'f and plunger during the operation of grasping the hand, but that the contact points of said plunger may be made to vary in accordance with the size of the watch; that is, in case of a small sized cannon staff the pin extension 1) of the plunger would he employed, whereas a larger cannon staff might necessitate the use of the neck g.

In order to lift the hour hand from the cannon, the handles are pressed toward each other resulting in the separation of the tooth f from the portion '5 of the frame It as shown in Fig. 2 of the drawings. The tool is so turned as to admit of the insertion of the outer teeth or prongs i beneath the inner end of the hour hand of the watch, the cannon entering the rounded notch between said prongs. By allowing the prongs i andf to again spring together, it will be seen that the hour hand will be grasped between said prongs and may readily be lifted from the watch.

In order to remove the seconds hand I so turn the tool as to admit of the insertion of the prongs 7c of the frame portion 2' beneath the inner end of said seconds hand thus enabling the operator to lift the hand from the watch without injury to the latter.

By turning. the thumb not 772. upward on the split tube m until the screw m is sufficiently loose in said tube, it is evident that the plunger rod must be adjusted outward or inward by rotating the same. This having been accomplished it will be seen that a close engagement of the tube on and its screw on may be had by turning downward the thumb nut m which will result in clamping the separated tube section closely against said screw on, and thus obviate any tendency of said screw to turn. through the rotation of the threaded hub 19 about the outer ends of said plunger.

From the construction which I have herein shown and described it will be seen that a simple, neat and reliable tool is produced by which the lifting and handling of the hands of a watch may be easily accomplished without injury to the watch and without loss of time.

It is evident that a tool of this class may be produced at a reasonable cost and that the same will be of great utility to jewelers, watch-makers and others engaged in con structing and repairing watches.

Having now fully described myinvention, what I claim, and desire to secure by Letters Patent, is-

1. In a jewelers tool the combination with the j ointedly connected bowed arms a. a, inwardly projecting jaws d cl thereon and notches e in said jaws, of the transverse lifting frame it embracing said jaws and secured to one of the same as described, outturned notched end portions i and i on said frame, a bifurcated tooth f secured to the jaw d on the inner side of said frame end "i and a spring strip 0 normally pressing the handles of said tool outward substantially as and for the purpose specified.

2. In a jewelers tool the combination with the arms a at having as described bowed portions (1 and jaws cl (1, slotted openings a a in said arm heads, the opening a adapted to receive the head of the arm a, pivot screws b connecting as described the sides of said heads, a pivot pin 1) having end spindles b journaled in the ends of said screws b, of a plunger rod m passing loosely through said pin. 19 and projecting between the jaws cl d, toggle arms n jointedly connecting the inner end of said plunger with the handle sections and a spring between said handle sections substantially as and for the purpose specified.

3. In a jewelers tool the combination with the arms a a having as described bowed portions a and jaws dd and a pivot pin 2) jointedly connecting said arms and having an opening therethrough, of a plunger rod m passing loosely through said pin 1) and projecting between the jaws cl d, a screw termination m on said plunger rod, a split internally threaded tube m which receives said screw m as described, a clamping nut m on the outer screw threaded surface of said tube, toggle arms 12 jointedly connecting said tool handle portions and said tube 112*, and a spring bearing between said handle portions substantially as and for the purpose specified.

4. In a jewelers tool the combination with said sleeve being adjustably secured as de- 30 scribed on said rod m substantially as and for the purpose specified.


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US5195353 *Apr 2, 1992Mar 23, 1993Electroline Corp.Tools for crimping tubular elements on wire or cabling
US5307565 *Dec 4, 1992May 3, 1994Electroline Corp.Hand tool with ratchet action jams
US6240614 *Nov 22, 1999Jun 5, 2001Ricoh Company, Ltd.Blind rivet disassembling device and method and production system using the method
Cooperative ClassificationG04D1/08