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Publication numberUS533923 A
Publication typeGrant
Publication dateFeb 12, 1895
Filing dateOct 10, 1894
Publication numberUS 533923 A, US 533923A, US-A-533923, US533923 A, US533923A
InventorsWilliam C. Seyfriedt
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Watchmaker s tool
US 533923 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

(No Model.)


WATGHM-AKERS TOOL. 'NO- 533,923- Patented Feb. l2. 1895l 7 Mmmm u Illllmmm.




SPECIFICATION forming part of Letters Patent No. 533,923, dated February 12, 1895.

Y Application filed October 10, 1894. Serial No 525.498. (No model.)

To all whom it mag/concern:

Beit known that I, WILLIAM O. SEYFRIEDT, of Fort Worth, county -of Tarrant, State of Texas, have invented certain4 new and useful Improvements in Watchmakers Tools, of

which the following is a specification, reference being had to the accompanying drawl indicates the balance wheel' of a watch andv ings. y

. The object of my invention is to produce an improved tool for removing the collet and hair spring of a watch from the balance wheel arbor, without injuring the hair sp'ring of the watch and at the same time holding the bal,

anco wheel secure against accident or injury. In the accompanying drawings:l Figure I is a side elevation of my tool, in operative relation with the 'l balance wheel, both, being shown on an' enlarged scale and the collet being shown in section. Fig. II is a perspective View of my tool detached and opened. Fig. III is an end View thereof. Fig. IV is a modied form of the fork or c ollet separator.

Referring to the figures on the drawings:

2 its arbor.

3 indicates the hair spring and 4 the collet to which, at onc end as usual, the hairspring vis attached.

..5 indicates one leg of my tool and 6 the other. They are united together at their upvperends, as indicated at 7 and one or both may be of resilient spring metal constructed I so as to stand normally in the separated po sition shown in Fig. II of the drawings, after the manner of ordinary tweezers. I prefer, however, to make the leg 5 straight, as illustrated, and comparatively rigid, making the leg 6 the active one.

7a indicates the collet separating fork which may be made integral with the leg 5 and bent at right angles thereto, or it may be a made of a separate piece of metal and welded.,

of the ordinary cross piece 1l of a balance wheel. l It is formed with or attached to the.

shown in Fig. II of the drawings, the fork is slipped upon the arbor between the collet and the cross piece and the leg 6 is pressed between the thumb and fore finger of the operator until it strikes th'e arbor above the cross piece.V In this position the cross piece is closely confined` between/theupper face of the fork and the lower face of the-arbor bearing piece 10 and is' prevented from tilting or twisting, but by a continuons pressure upon the legs is forced along with the arbor,until the arbor'is confined between thejarbor seats in the fork and-the arbor bearing piece, Where it is securely held by the hand of the operator. As the arbor is driven into the fork, the beveled or wedge shaped edges ofthe fork force themselves between the cross piece and the collet and, by an even and easy movement, separate the collet from the arbor with a precision which insures its separation with perfect safety to the hair spring.

In practice different sizes of tools to suit various sizes of watches will'be manufactured.

I am aware that a collet removing, tweezershaped tool, such for example asis shown in Patent No. 262,875, issued August 15, 1882, is not new, but the' subject matter of that patent and devices of similar character are easily distinguishable from my invention, and the differences are clearly defined in the following claims, to wit: l 1

1. In a collet removing tool, the combination with a pair of legs adapted to close toward each other, of a collet separating fork on one and an arbor bearing piece on the other, and arbor bearing seats in thefork and in the arbor bearing piece, respectively, between which the arbor is adapted to be se- "curely held, substantially as specified.

2. Ina collet removing tool, the combination with a pair of legs adaptedto move toward each other, of a collet separating fork, and an arbor bearing piece in dierent planes and moving parallel to each other to securely clamp an arbor between the seats in the fork and in the arbor bearing piece, substantially as speeied.

3. In a collet removing tool, the combination with a pair of tweezer legs, of a collet separating fork, and an arbor bearing piece carried at right angles on the legs, respectively, and moving parallel to each other, but in different planeswhereby an arbor ma7 be securely clamped between the bearing seated in the fork and in the arbor bearing piece, substantially as specified.

4. In a collet removing tool, the combination with a pair of tweezer legs, of an arbor

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2587139 *Jan 26, 1949Feb 26, 1952Abram GloverRoller removing tool
US2679776 *Apr 2, 1952Jun 1, 1954Ignacy FilipJeweler's pliers with jaws having pivoted side plates
US2700910 *Jan 6, 1954Feb 1, 1955Tinnerman Products IncPivoted jaw spring nut remover
US2839325 *Sep 26, 1957Jun 17, 1958Turner & Seymour Mfg CompanyTongs
US3163059 *Aug 28, 1962Dec 29, 1964Philip TempelSwivel pin opener and closer and hook holder
US6916054 *Aug 18, 2000Jul 12, 2005Outils Rubis SaTweezers
US7413228 *May 5, 2003Aug 19, 2008Kam Por Paul TongHard flex tweezers
US20040222653 *May 5, 2003Nov 11, 2004Tong Kam Por PaulHard flex tweezers
Cooperative ClassificationG04D1/08