US2033892A - Tool - Google Patents

Description

A.' M. PARVIN TOOL arch 1U, 1936.

' Filed April 24, 1934 Patented Mar. 10, 1936 UNITED STATES PATENT OFFICE 'rooL Application April 24, 1934, Serial No. 722,133

3 Claims.

f The present invention relates to a tool for facilitating the assembling or disassembling of work pieces which are removably secured together. More particularly, the present invention relates 5 to a combined vise and wrench for use in assembling and disassembling the parts of a nozzle assembly. In the construction of oil burners having an oil discharge gun assembly, it is common to employ a discharge nozzle in which an inner nozzle is secured by means of a threaded nipple. The nipple is generally made of brass and is slotted at one end for the reception of the end of a screw driver to facilitate the insertion or removal of the nipple. The discharge nozzle and the nipple, when sent out from the factory and when in use, are very tightly threaded together. During the use of such nozzle assemblies it not infrequently happens that dirt becomes lodged therein or the parts become gumrned up or corroded or the discharge orice becomes clogged. This necessitates disassembling so that the parts may be cleaned or worn parts replaced.

As these repairs are generally made in the 251 place where the burner is used, certain difficulties arise which it is the aim of the present invention to obviate. ly small, frequently being less than an inch in diameter. In addition, they are covered with oil repairs, it has been the custom for the workman either to grip the assembly in one hand so that the nipple may be unthreaded or rethreaded with a screw driver held in the other hand, or to clamp the assembly in a Stillson wrench before using a screw driver on the nipple. The tightness of the nipple requires that the workman exert considerable pressure with the screw driver. As a consequence, when the nozzle is held in the hand, the oiliness of the work and its small size present the constant danger that the screw driver will slip olf and gouge the workmans hand. Clampingthe nozzle in a Stillson wrench gives rise to the possibility that if the screw driver slips off, the workman may scrape his knuckles on the wrench, and in addition, the wrench tends to chew the surfaces of they nozzle, thereby rendering its remounting in the burner impracticable. Moreover, since the nipple is generally made of .D brass and is therefore soft,` there is always the danger, regardless of how the nozzle is held, that the screw driver willrstrip the keyway and thus make removal of the nipple impracticable.

It is the principal object of the present invention to provide an assembling and disassembling tool in the use of `which there is no danger of physical injury to the user or damage to the work itself.

To they accomplishment of this object and of 60 such others as may hereinafter appear, the vari- These nozzle assemblies are general-` and hence are slippery. Heretofore in making.

(c1. sp1- 3) cus features of the present invention reside in certain devices, combinations, and arrangements of parts fully set forth hereinafter and then pointed out in the appended claims, possessing advantages which will be readily apparent to those skilled in the art.

The various features of the present invention will be readily understood from an inspection of the accompanying drawing, illustrating the best form of the invention at present known to the inventor, in which Figure 1 is a view in side elevation with the upper arm slightly raised to show the abutment shoulder;

Fig. 2 is an enlarged detail view in sectional elevation taken along the line 2--2 of. Fig. 1, but with the screw driver end being. shown in the keyway of the nipple; and

` Fig. 3 is a view in plan of the nozzle assembly and of the socket end of the arm.

The illustrated embodiment of the present invention comprises, fundamentally, a tongs, one arm of which is enlarged at its free end as indicated in Fig. 3 and is provided with a jaw comprising a socket 6. The bottom of this socket is provided with an annular opening 1 smaller in diameter than the socket so as to provide an annular supporting shoulder B. The opposite end of the arm 5 is provided with an integral upstanding lug 9 to the top portion IIl of which the yoked end II of a second arm I2 is pivoted by means of a pin I3. The free end of the second .arm I2 is provided with an opening I4, axially at right angles to the arm, and the arm itself is substantially as long as the arm ElY so that the arm I2 may be swung to position the opening I4 over the socket 6, as indicated in Figs. 1 and 2.

Threaded into the opening I4 is a spindle I5, the lower end I5 of which is a jaw wrench comprising the wedge-shaped end of a screw driver. The opposite end I'I of the spindle is provided with an opening I8 in which is secured one end of a lever rod I9.

As shown in Fig. 1 the lug 9 is provided with a shoulder extending forwardly from the base of the top portion Ill. This shoulder forms an abutment for the arm I2 adjacent the yoked end II and limits the movement of the .arms 5 and I2 toward each other to a position in which they are substantially parallel.

The socket 6, lshown for the purpose of disclosure only as being hexahedral, is adapted to receive and support against rotation a discharge nozzle 2I, such as that of an oil burner gun assembly, of well known construction, comprising a dome-shaped surface 22 provided with a discharge orifice 23, a hexahedral nut portion 24, and an externally threaded end portion 25 by which the nozzle is mounted in the burner assembly (not shown).

The discharge nozzle 2I carries an inner nozzle 26 provided with a nose 21 adapted to abut the inner surface of the dome 22. To hold the inner nozzle securely in place a brass nipple 28 is threaded into the discharge nozzle in tight engagement with an annular shoulder 29 formed y as limiting the various features of the present inon the inner nozzle 26. To facilitate the threading of the nipple 28 into and out of engagement with the inner nozzle 26, the nipple is provided with a keyway 30, comprising diametrically opposed slots, adapted to receive the end of a screw driver. The inlet end 3| of the inner nozzle 26 may also be provided with a similar keyway 32.

When it is desired for any reason to take the nozzle assembly apart, the assembly is removed from the burner and is placed in the socket 6 with the dome 22 resting on the rim of the annular supporting shoulder 8 as indicated in Figs. 1 and 2. The arm I2 is swung into abutment with the shoulder 2U on the lug 9 to make the arms 5 and I2 substantially parallel, the spindle I5 being rst rotated, if necessary, to cause the screw driver end I6 to enter the keyway 30. The workman then grips the arms 5 and I2 tightly. It will be seen that in this manner the nozzle assembly is held firmly as in a vise, being gripped between two parallel jaws, one of which comprises the socket 6 which supports and receives the nozzle assembly, and the other jaw comprising the screw driver end I6 which enters the keyway 36. 'Ihe discharge orifice 23 is exposed by reason of the opening 'I and thus is protected from harm while the assembly is gripped.

To loosen the nipple 28 the workman, while rm'ly gripping the arms 5 and I2, has merely to swing the lever rod I9 counter-clockwise, thereby turning the nipple 28 in the discharge nozzle 2| The spindle I5 merely rises in the arm I2 as the nipple is turned, the arms 5 and I2 remaining substantially parallel, and when the nipple has been thus turned several revolutions, it may be unthreaded by hand. A reversal of this operation, of course, effects a threading of the nipple into the nozzle 2I in tight engagement with the shoulder 29 on the inner nozzle 26.

As shown in Fig. 1, the width of the screw driver end I6 is slightly less than the diameter of the nipple 28. With this construction there is eliminated any chance of the screw driver end engaging the internal threads of the discharge nozzle 2I with resultant injury. It will be apparent, viewing Fig. 2, that the spindle I5 may be easily threaded downwardly to cause the screw driver end I6 to enter the keyway 32 of the inner nozzle 26. This is of practical importance if the inner nozzle is stuck in the discharge nozzle and can not be shaken out without being first turned to loosen it.

It will be seen that the present invention provides a small, compact, and easily handled tongs which comprises a lever of the third class operating as a combined vise and wrench. The arms 5 and I 2 may be held tightly by one hand thereby serving to grip the nozzle assembly as in a vise, and since the screw driver end I6 is, in effect, not only a wrench but also one jaw of this vise, it follows that with one hand the workman performs the two functions of gripping the assembly and of maintaining the screw driver end I6 in the keyway 30. The workman thus uses his other hand merely to turn the screw driver end I6. With this mode of operation it is impossible for the screw driver end I6 to slip off with injury to the workman, the discharge nozzle is not chewed, and there is eliminated any of the danger of stripping the keyway 30 which frequently occurs when a workman must turn a screw driver and also exert pressure with the same hand to hold the end of the screw driver in the keyway.

Nothing herein explained is to be interpreted vention in the scope of its application to use in connection with the particular type of work operated upon or the particular device or the particular mode of operation thereof 0r all three selected for purposes of illustration and explanation. Various changesv may be made in the particulars of structure disclosed and in the mode of operation thereof, without departing from the true scope of the actual invention, characterizing features of which are set forth in the following claims.

What is claimed as new, is:

1. A tool comprising a pair of arms, means for pivotall-y relating an end of one of the arms to an end of the other arm so that said arm ends are spaced apart, an abutment carried by one of the arms and engageable with the other art to milit they movement of the arms towards each other to a position in which the free ends of the arms are substantially parallel, a pair of coacting jaws carried by said free arm ends, respectively, for gripping the work between them as the operative grips the arms to hold the abutment and said other arm engaged, the axes of said jaws being normal to said free arm ends, respectively, and means for rotating the jaws relatively to each other while in engagement with the work and while the arms are maintained by the operative in the position determined by the abutment.

2. A tool comprising a pair of arms, a member carried by one of the arms and to which the other arm is pivoted, said member being provided with an abutment adapted to engage said other arm to limi-t the movement of the arms towards eachother to a position in which the working ends of the arms are substantially parallel, a pair of Acoacting jaws carried by the working ends of the arms, respectively, for gripping the work between them as the operative grips the arms to hold the abutment and sai(- other arm engaged, the-axes of said jaws being normal to the said working arm ends, respeftively, and means f or rotating the jaws relatively to each other while in engagement with tlf-w work and while the arms are maintained by the operative in the position determined by the abutment.

3. VAtool comprising a pair of arms, a member carried by one of the arms and to which the other arm is pivoted, said member being provided with an abutment adapted to engage said other arm to limit the movement of the arms towards each other to a position in which the working ends of the arms are substantially parallel, a pair of coacting jaws carried by the working ends of the arms, respectively, for gripping the work between them as the operative grips the arms to hold the abutment and said other arm engaged, one of said ja-ws being adapted to enter the work, the other one of said jaws being adapted to receive and support the work, and the axes of said jaws being normal to said working arm ends, respectively, and means for rotating the jaws relatively to each other while in engagement with the work and while the arms are maintained by the operative in the position determined by the abutment.

l ALBERT M. PARVIN.

Images