US1531086A - Spiral tool - Google Patents

Description

March 24, 1925. 1,531,086

T. J. FEGLEY ET AL SPIRAL TOOL Filed Aug. 16. 1923 2 Sheets-SheetI l L .Hlrd MM5. w f

may@ M14/Mm March 24. 1925. 1,531,086

T. J. FEGLEY ET AL sPiRAL TOOL Filed Aug. 16. 192s 2 sheets-sheet 2 dotted lines Patented Mar. 24, 1925.

y UNITED STATES THOMAS .IITEGLEY AND GEORGE o. Lnoronn, or enrnannnrnre, PENNSYLVANIA,

i CORPORATION OF PENNSYLVANIA.

CO., OF PHILADELPHIA, PENNSYLVANIA, A

SPIRAL TOOL.

Application filed August 16, 1923. Serial No. 657,755.

To all fic/om t mog/f concern:

Beit known that we, THOMAS J. Fneiinr and GEORGE O. LEOPOLD, citizens of the United States, residing in Philadelphia, Pennsylvania, `have invented certain Im.- provements in Spiral Tools, of which the following is a rspecilicationl This invention relates to certain improvements 'in spiral ltools of the type in which a spiral spindle reoiprocates within a tubular casing. f y n `.The object of this invention is to provide a simple and elifective means for' holdingy the spiral spindle within! .the casing vagainst f the pressure of thekprojecting spring.

In the accompanying drawings:

JFig. 1 isa sidelview of a spiral screw driver illustrating our invention Fig. 2is a sectional view of that portion oit the screw driver to which our invention relates, the cam ring being in section;

Fig. 3 is a vertical sectional view on the line Sfe, Fig. 2; 4 i

Fig. l is asectionalplan view on the line 444:, Fig. 3;

Fig. 5 is a sectional plan view on the line 5-5, Figf; n

Fig. 6 is a sectional plan view on the line 6 6, Fig. 3; showing the cam ring in position to allow the spindle to move freely;

Fig. 7 is a view on the saine lineas Fig. 6, showing the cam ring shifted to lock the `spindle to the casing;

Fig. 8 is a detached perspective view of parts of the mechanism;

Fig. 9 is a view illustrating a modification of the invention;

Fig. 10 is a view, partly in section, illustrating another modification;

Fig. 11 is a sectional view on the line 11-11, Fig. 10; 4 l

Fig. 12is a view, partly in section, illustrating still another modification; and

Fig. 13 is a sectional view on the line 15S-13, Fig. 12.

Referring in the first instance to Figs. 1 to 8 of the drawings, 1 is a hollow casing having a handle 2 at one end and anv enlarged section. 3 at the opposite end, in which `is the ratchet mechanism shown by in Fig. 1. This mechanism is controlled by a shifter 4:. in the vmanner common to this type of tool. The enlargement 3 is enclosed within a shell ratchet 5. G is Aa spindle adapted to reciprocate within the casing. This spindle has spiral grooves 8 cut therein, as shown in Fig. S. At the lower end of the spindle is an 'annular groove 9, which is adapted to receive a locking key 10 that is moved .into posi tion in the groove when it is desired to lock the spindle within the casing. At the e5'- treme end of the spindle is a chuck 11 tor holding a screw driver, or drill hit.

The Outer end of the enlarged portion 3 of' the casing has an internal screw thread, Fig. 2, to which is adapted a thread or' a plug`12, which has a central opening for the passage of the spiral spindle 6, Fig.- 3. The plug 12- has a groove 13, in which is a spring 1li. This spring has a curved enlargement 15 that extends intov recesses 16 1u the walls of the groove. The spring is confined in position hy a cam ring 1T, which v.is wider than the groove and lit-s the en larged portion oit the plug 12. This portion is cut away, as shown in Fig. 8, to allow for the free movement of the cam portion 18 loit the ring 17. The free end of the spring 111 has a lateral portion 19, and also has an extension 19a, which prevents the spring jumping out of the opening 2O.` The lateral portion 19 enters the opening 2O in the key 10, which is located in a slot 21 cut in the plug 12. The slot extends into the opening in which the spiral spindle reciprocates so that .the key 10, when projected hy the cam ring 17, will enter the groove 9 in the spindle, holding it `against longitudinal movement. The key is made as clearly shown in Fig. 8, and has a beveled portion 22, in which the cam 18 rests when the cam ring is in the position shown in Fig. 6. Then the cam ring is turned to thel position shown in Fig. 7, the cam 18 rides upon the edge of the key and forces it into the groove 9 ot the spindle. The face of the cam is flat, as shown, and is formed on the ring 17 by crimping the ring, as shown clearly in Fig. 8.

In the Ordinary operation of a spiral. screw driver, a spring 23, Fig. 1, retract-s the handle and the casing. When the handle is pressed'torward, the spiral spindle is turned in a given direction, according to 'theposition of the shifter 4l. ln order to lock the spindle within the casing, as shown in Fig. 1, the key 10is provided, which, on

turning the cam ring 1T, is projected into the groove'9 ot the spindle, holding the spindle against the pressure ot the spring Q3. On reversing the movement of the cani ring, the spring la retracts the key l0 and the spring 9.8 is free to project the spindle.

In Fig. 9, a modilication is illustrated, in which the spring 14 has 'rounded extentions 19a, which rest in recesses 16a in the walls of the plug 12a, conining the rear end ot the spring` to the plug.

In Figs. 10 and ll, another modifiration is shown, in which the inner end oit the spring lllb is bent. This portion ot' the spring extends under ears 16D, pressed from the metal of the plug 12b. V

In Figs. 12 and 13, still another modification is illustrated, in which Vthe spring lll is clamped to the plug by bars 160, contining the rear end or" the spring to the plug.

The constructions hereinbefore described are not intricate and the cam ring can be readily manipulated to lock, or unlock, the spindle, when desired.

lVe claim:

l. rlhe combination in a spiral tool, ott a casing; a` grooved spindle located Within the casing; a spring tor projecting the spindle; a plug secured to the end of the casing, said plug having an annular groove therein and a slot communicating with the groove; a segmental key mounted in the slot; a spring having enlargements at one end extending into the recesses in the Walls of the groove, said spring having a lateral portion at its opposite end extending into an opening in the key and tending to force the key outwards; and a cam ring having` a cam portion acting on the key to project it into the groove ot' the spindle when the spindle is retracted.

2. rThe combination in means for locking aV spindle to the casing oil a spiral tool, of a casing having a plug; a spindle having a groove; a key in the plugv arranged to be moved into the groove to lock the spindle, said key having an opening; a spring having a lateral extension projecting into the opening, the opposite end of the spring having a curved enlargement, the plug having a recess to receive the enlargement; and a cam ring enclosing the key and the spring, said cam ring being arranged to act upon the key to :torce it into the groove of the spindle.

3. The combination in means for locking a spindle to the casing -oif a spiral tool, oit' a casing; a plug secured'to the casing; a spindle extending through the plug and into theA casing and having an annular groove therein; a laterally movable key in the plug; a cam ring for moving the key into the groove oit the spring; and a spring, for retracting the key, secured at one end to the plug, said spring having a lateral portion engaging the key and also having lateral extension, which holds it in engagement With the key.

THOMAS J. FEGLEY. GEORGE O. LEOPOLD.

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