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Publication numberUS1803728 A
Publication typeGrant
Publication dateMay 5, 1931
Filing dateSep 19, 1929
Priority dateSep 19, 1929
Publication numberUS 1803728 A, US 1803728A, US-A-1803728, US1803728 A, US1803728A
InventorsRoot Charles S
Original AssigneeRoot Charles S
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Tweezer tool
US 1803728 A
Abstract  available in
Images(1)
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Claims  available in
Description  (OCR text may contain errors)

May 5,.1931. T 1,803,728

TWEEZEH TOOL I v Filed Sept. 19, 1929 I N VEN TOR.

ATTORNEY;

Patented May 5, 1.931

CHARLES s. R0010}? SPRINGFIELD, MASSACHUSETTS rwEEzER moor.

A'milieation filed September 19, 1929. Serial No. 393,809.

This invention relatesto improvements in tweezer tools andis directed particularly to tools for gripping small objectsof all kinds andshapes. it p One object of the invention is the provision of a tool of the class described which is simple in construction and'eflicient in operation.

"Another object of the 'inventionis' the pro vision of a tool which is adapted to easily and quickly engage a'ndhold' objects and to release Other'objects an'd'advantages of the invention will be observed from the following description thereof which for purposes of diselosure is directed to tool forluse for re.-

placing the parts of split-washers, valve rod pins and the like such as are used with an internal combustion engine. It. will be apparent that the novel features of the invention are adapted for use in connection with tools which may be designed for handling various objects.

In the drawings v v Fig. 1 is a planview of a tool embodying the novel features of the invention." v

Fig. 2 is a side elevational view of thesame. Fig. 3 is a fragmentary-planview showing certain of the parts in an open position. j

Fig. 4 is an end elevational view showing the end of the support ofthe tool, and

Fig. 5 is a view similar to that o fv Fig. 4 showingtheparts in a different position. 1

Referring to the drawings in detail the inventionwill now be described.

A holder orvs upport is provided whichis preferably in the form; of a tubethe rear end of which carries afinger grip 4, while the forward end is partly closed'or compressed to provide separate passageways or guideways e, as shown'in Fig. 4. i A member preferably of springlike wire is doubled upon itself to provide a fingerringS and. shank portions 10. the Iatter'ofWhich passthrough and are slidable in the; holder and havetheir forward ends guided in the guideways 6. The extremities 12 of the shank portions extend in a diverging relation and, are-curvfd asshow-n to provide co-Operating'artiele gripping, fingers-14.

A compression spring 16 is disposed'bef open as the shanks are. moved the" arts against displacement.

tweenthe end of the holder 2 andring 10 to urge the shanks and fingers rearwardly of T the support so that the fingers are normally held in their closed position shown in Fig. 1. By placing the first and second finger of the 5 hand behind the grip 4 and inserting the thumb in the ring 10 the tool may be supported by the hand and then by moving. the thumb towards the fingers the tube and shanks are moved relative to one another whereby the fingers are opened to the position shown in Fig. 3. The shanks are ofi'set or formed as at 18 so that the fingers 14 may forwardly of the 'tube. They may begiven any shape desired in order to obtain the action desired.

Shelf members 20 are secured in some convenient manner to the fingers for co-operating therewith andact as supports forarticles embraced or fingers.

Where the tool is to be used in connection with the split washers for valve stems, each half partof the washer may be placed on a shelf. These half-parts; as shown in doti dash lines, are semi-circular in shape and may rest on the shelves while at the same time they are embraced by the fingers.

Upstanding ledges 22 fixed to and associated with the fingers and shelves are provided for engaging one end of the inner faces of the half parts of the washer and function to hold I eans for engaging the inner faces of the half parts at their opposite sides will. now 35 be'described. 7 g

Upstanding angular shaped lock members 24. are fixed to the ends of arms 26 which are fixed toa tubular member 28 slidableon 4 I the support2. These are arranged so as to normally spring outwardly whereby the members 24 are carried to abut theinner sidesof l the shelves. A compression spring disposed between the end ofrthe member 28 and grip 4 resists a rearward'movement of member28 relative to the support. A trigger member 130. fixed tothe undersideofmember 28 is provided to facilitate a sliding movement thereof with respeetto the holder or support.

In the operation of the tool the half parts gripped by or between the 1 l of a split washer are placed on the shelves as in Fig. 5, so as to be supported thereby and are embraced by the fingers 14. The locks 24 are inserted between the half parts so that they are held on the shelves by the ledges 22 and locks 24 so that the fingers may now be opened.

With the first and second fingers at either side of the support and behind the grip l and the thumb inserted in the ring, the fingers 14 are opened by. pressing the fingers and thumb together. With the fingers open the tool may be manipulated so that the washer half-parts may be passed by the opposite sides of a valve stem. This is of course necessary in order to place the washer parts on the stem.

When the washer halves are in place with respect to the stem, the spring 16 is allowed to move the shanks and support relative to another so that the fingers may close and cause the half-parts to embrace the valve stem as is desired. Then to release the washer half-parts the trigger is engaged and pulled rearwardly to slide the tube 28 rearwardly of the support and move the locks 2 from between the half-parts. As they are released the half-parts fit within the seats provided therefor on the valve stem and may be entirely released by the tool. This may be done by moving the shanks and support against the action of the spring 16 so that the fingers 14 will separate or open.

The form of the fingers, shelves, ledges and locks may be varied to adapt the tool for use with objects other than the split washers described. Obviously the ends of the fingers may be used for embracing the pins to be inserted in valve stems or the like. In fact various changes may be made to adapt the tool to many and various uses without departing from the spirit and scope of the invention.

What I desire to claim and-secure by Letters Patent of the United States is:

1. A tool of the class described comprising in combination, a support in the form of a tube having its forward end partly closed to provide spaced guideways. a member bent upon itself to provide shanks which extend through said tube and guideways and a ring at the rear end of said tube, the shanks as they extend through said guideways being disposed in a diverging relation and then extended towards one another to form co-opcrating gripping fingers, shelves carried by said fingers for supporting an article gripped by said fingers, upstanding ledges associated with said fingers for co-operating with said fingers for gripping one side of-an object, and spring pressedmembers for co-operating with said ledges and fingers for gripping another side of an object.

2. A tool of the class described comprising in combination, a tubular support having its forward end partly closed to provide separate guideways, a member slidable therein having diverging members extending through said support and guideways and a ring at the rear end of said support, the said diverging members being curved towards one another to form cooperating fingers, a compression spring between the rear end of said support and said ring, a tube slidable on said support, spring arms carried thereby, lock members on said arms disposed so as to cooperate with said fingers for holding an object, and a spring between said tube and tubular support tending to urge the former forwardly of the latter whereby the lock members may co-operate with the fin- 8O gers for holding an object.

3. A tool of the class described comprising in combination, a hollow support having one end formed to provide separate guideways,

a member bent upon itself to form shanks slidable in said support, the extremities of said shanks outside the guideways being curved outwardly and inwardly to form gripping fingers, shelves on adjacent sides of said fingers for supporting articles, (99 ledges at the ends of said fingers, and other members movable on said support having locks for co-operating with said ledges for holding articles on said shelves.

4. A tool of the class described compris- ,1 ing in combination, a hollow support having guideways at its forward end, a wire member bent upon itself to provide shanks extending through said member and guidewa-ys and having a finger ring portion at the rear end. 10 thereof and finger members curving away from said guideways and then towards one another, shelves extending inwardly from adjacent inner sides of said fingers, ledges on the extremities of said finger members, 21. 5 member .slidable on said support having forwardly extending arms and locks on the extremities of said arms disposed between said fingers for co-operating with said ledges for holding articles on said shelves.

. 5. Atool of the class described comprising in combination, a hollow support having guideways at its forward end, a wire member bent upon itself to provide shanks extending through said member and guideways and having a finger ring portion at the rear end thereof and finger members curving away from said guideways and then towards one another, shelves extending inwardly from adjacent inner sides of said fingers,fl20 ledges on'the extremities of said finger members, a member slidable on said support, inwardly yieldable arms extending forwardly of said member, the ends of which are disposed at aside of said shelves, and locks on was said ends extending transversely of said shelves.

6. A tool of the class described comprising in combination, a hollow support having guideways at its forward end, a wire mem- (D0 ber bent upon itself to provide shanks extending through said member and guideways and having a finger ring portion at the rear end thereof and finger members curving away from said guideways and then towards I one another, shelves extending inwardly from adjacent inner sides of said fingers, ledges on the extremities of said finger members, a member slidable onrsaid support, a part at the rear end of said support, springs between said partand finger ring and between said member and said part to urge the shanks and slidable member rearwardly and forwardly respectively of said support, a pair of diverging inwardly yieldable arms extending forwardly of said slidable mem her and having looks at the ends thereof disposed between said shelves.

In testimony whereof I affix my signature.

CHARLES S. ROOT.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4632110 *Aug 30, 1985Dec 30, 1986Olympus Optical Co., Ltd.Medical operation instrument for endoscope
Classifications
U.S. Classification29/249, 294/99.2, 606/175
International ClassificationB25B27/24, B25B9/00, B25B27/14
Cooperative ClassificationB25B9/00, B25B27/24
European ClassificationB25B27/24, B25B9/00