US1678270A - Pin-holding tool - Google Patents

Description

July 24, 1928. 1,678,270 F. F. PROSCH PIN HOLDING TOOL Filed Aug. 2, 1926 Fig: 5.

floycl Plwsdz WIW Patented July 24, 1928. I

UNITED STATES 1,678,270 PATENT OFFICE...

FLOYD r. rnoson, or MGPHERSON, KANSAS, ASSIGNOR OF ONE-HALF T RUBEN L. WALLiNE, or McPI-IERSON, KANSAS.

' PIN-HOLDING TOOL.

Application filed August a, 1926. Serial No. 126,456.

The invention has for an object to effect an improvement in. tools of that character which are specially constructed to grasp small. pins and the like, for insertion in openings in machinery and mechanisms of various kinds, and particularly a device adapted to facilitate the emplacement of pins in the ends of valve stems.

It is a special aim of the invention to so shape a plier for inserting pins that a user may readily observe the opening into which a pin is about to be inserted up to the instant that the pin is entered, without re-- quiring awkward positions oftheoperator of the tool. A further aim is to make it possible to easily drive a pin into a valve stem aperture or other opening while held in the plier, without the application of force through the plier itself but enabling blows portion of the blank from the jaw to the to be delivered directly upon the end of the pin.

Another aim of the invention is to provide a novel and desirable constructimrin plier manufacture, especially applicable to the production of a tool of this character.

Additional objects, advantages and features of invention reside in the constructlon and arrangement of elements, as will be un-' derstood from the following description and the accompanying drawings, wherein Figure 1 is a side elevational view of a vention.

Figure 2 is a front end view of the tool.

Figure 3 is a detail of one of the members of the pliers.

Figure 4 is a similar view of the other member.

Figure 5 is a plan of the blank for the element 10. y

There is illustrated a tool in the form of a pair of pliers, including two pivot-ally connected levers and 11 formed from blanks of nearly identical shape as shown in Figure 5. In the blank, each lever comprises a substantially straight strap of metal having near one end an ear 12. The outer part of the blank adjacent the ear comprising a jaw 14 is gradually narrowed, and has a terminal lateral extension or bill 13 at right angles to the axis of the blank. The bill 13 is about three-sixteenths of an inch wide in one embodiment of the invention. The ears 12 are centrally apertured to receive a usual pivot pin or bolt 15 as shown, and are pressed from the plane of the body of the blank slightly in opposite directions. In

'- tended from the same'edge of the blank a nib 19 on the lever 10 and a correspondingly located nib 20 for the lever 11.

.It is to be noted that the ear and nib on the lever 10 are on the same edge of the blank with the bill 13, while for the lever 11 the ear and nib are at the opposite edge of the blank from said bill. This is importantin enabling the twisting of the parts to lie incooperat-ive relation as will be explained. While the ears are the fulcrum proper, for convenience the intermediate base of the handle, including the part adjacent and between the ear and nib are termed the fulcrumed port-ion 16. The handles are twisted a quarter turn on a longitudinal axis so that broad faces are presented in opposite directions for greater conveniencein manipulation. The jaws 14 are also twisted a quarter turn, and it is important that this twist'be in the same direction relative to the fulcrum portion in each blank. It is shown as being counter clockwise in the present instance. In addition, the axis on which this twist is produced is closer to the inner edge of the blank than it is to the outer edge of the blank, so that the bases of the jaws will fall close to each other, and in fact may contact when the device is assembled, the jaw being also given a set so that they may extend in close relation or in contact throughout their length i without requiring trimming of material or peculiar conformations in the blanks.

Theears are plvotally connected together by the pin 15, and the jaws then aline with each other when brought together. A helical expansion spring 21 receives the nibs 19 and 20 in its ends, whereby the handle portions of the levers are thrust apart and the jaw portions brought together, the spring being yieldable to manual pressure on the handles 17 of the device. Across the extremities of the bills 13 on their mutually adjacent faces there are formed alined grooves 22, parallel to the medial'plane of the device, and are intended to jointly receive therein a pin, but not being deep enough to prevent the pin from being securely clasped between the jaws under action of the spring 21. The grooves are formed extremely close to the outer end edges of the bills 13, and in practice-the metal of these extensions is thinned slightly and rounded on the ends by grinding, so that there will be a minimum bulk of material immediately adjacent the pin when the device is in use. by grinding or by a rotary cutter, after formation of the blank.

In the use of this device, a valve spring litter is customarily v employed, which is adapted to engage the usual spring seat or,

the jaws for the major portion of its length only a su'tiicient part or the pin being held between the jaws to enable its being pointed satisfactorily and obviate the liability of casual disengagement of the pin from the tool. The tool with the pin grasped therein is then held lightly in one hand and the pin presented in the opening in the valve stem, the tool being positioned with the ex-.

tensions 18 at the upper side so that no obstruction to the view of the opening in the valve stem is encountered. The pin having been entered in the aperture of the valve stem, it is thrust in as far as possible with my tool, and pressure then applied to the handles of the tool to release the pin from the jaws, after which, the valve spring lifter may be released and removed, allowing the spring to rest upon the collar over the inserted pin, as usual. i

The groove 22 is also formed My appliance may also be used for the ing in the valve stem readily, the medial portion of the pin may be grasped between the jaws so that the ends will project at the inner and outer parts of the extension 14. The outer end of the pin being set at or entered in the opening of the valve stem, a rod or other instrument may then be introducedbeside the tool so that the instrument may be pressed longitudinally against the end or the pin exposed at the inner sides of the jaws 14-, or a blow delivered by longitudinal reciprocation of the driving instrument. Also, in case the pin slips inwardly between the jaws and does not project sut ficiently for ready emplacementit may be readjusted manually by pressure upon the pin inwardly of the jaws. 14, without releasing the pin from the awsi,and great ce"- tainty in the placement of the pin in the appliance may thus be attained. As may be seen in Figs. 1, 3, and 4, the terminal parts .havin the 'rooves 22 therein )roect saliently, so that the uses described are facilitated. I claim:

Pliers for placing and removing pins and thelike consisting of two levers of sheet metal each including a handle and an intermediate portion in one straight piece, the latter having a nib and an ear longitudinally spaced from the nib, the nib and ear projecting from. one edge of the lever, and a jaw portion extended longitudinally from the intermediate portion opposite the handle, said jaw having a terminal lateral extension in a plane with and at right angles to the jaw. and formed with a groove across one side on a line longitudinally of the device;

said ears being overlapped and pivotally connected, said nibs being presented inward in opposed relation, a helical spring seated at its ends around the nibs and against the levers, said jaws having a twist both in the same direction a quarter turn adjacent the intermediate portion and disposed to meet in close parallel relation with said grip extensions alined, the said grooves being alined and opposed to jointly receive a pin.

In testimony whereof I afiix my signature.

FLOYD F. PROSCH.

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