US2151388A - Floating tap, reamer, and drill holder - Google Patents

Description

March 21, 1939. F. LOUGHLIN 2,151,388

FLOATING TAP, REAMER. AND DRILL HOLDER Filed 001;. 11, 1957 2 Sheets-Sheet l A! M 4 3s 1.9 3/ '2 Q i 7 3.? 7 d- 4 i a: 3? 6 Inventor Eva/12 i 01 19%! z '76 Afiorneys March 21, 1939. E. F. LOUGHLIN 2 Sheets-Sheet 7 Filed Oct. 11, 1937 By M 5m Aiiomeys l atentezi i l liar. 2, i939 UNETED STATES PATENT OFFlCE FLOATING TAP, REA'MER, AND DRILL HOLDER 3 Claims.

This invention appertains to new and useful improvements in holders for taps, reamers and drills. The principal object of this invention is to provide a holder of the character stated which will eliminate the frequent breakage of drills, reamers or taps which is now contended with through the urgency of a release structure and which will not interfere with the ordinary use of the holder.

During the course of the following specification other important objects and advantages of the invention will become apparent to the reader from the following specification:

In the drawingsz- Figure 1 represents a side elevational view of the holder.

Figure 2 is an end elevational view Figure 3 is a longitudinal sectional view on line 3--3 of Figure l.

Figure 4 is a cross sectional view taken substantially on the line 4-4 of Figure 1.

Figure 5 is a cross sectional view taken sub stantially on line 5--5 of Figure 1.

Figure 6 is a perspective View of the socket.

Figure 7 is a perspective view of the clutch collar.

Figure 8 is a side elevational view of one form of binder element,

Figure 9 is a side elevational view of another form of binder element.

Referring to the drawings wherein like numerals designate like parts, it can be seen that numeral 5 represents the barrel in which the spindle 6 is anchored by the set screw 7 and has its conical-shaped end 8 protruding beyond the work end thereof and into the socket tube 9 to engage into the small recess Ill centrally located on the adjacent end'of the tool shank it As is shown in Figure 3, and also in Figures 8 and 9, a binder such as is generally referred to by numeral i2 is employed for the tool. The tool may be a tap, a drill or a reamer 13. The binder consists of a tubular externally threaded member it provided with the polygonal-shaped wrench engageable head IS. The follower head is denoted by numeral IS in Figure 9 or 16a in Figure 8. Each of these follower heads l6l6a is provided with a shank I! which is slidably disposed into the externally threaded member ll against the action of the compressible spring l8. Each of the heads iii-46a is provided with a removed portion such as the 45 angular notch IS in the head IE or the arcuate-shaped notch 20 in the head Ilia. The head IE, or I611, engages and binds the tool shank ii in place as suggested in Figure 3.

The inner end of the socket tube 9 is provided with a pair of teeth 2i--2i for engagement into the recess 22-22 of the clutch collar 23. This clutch collar is seated in the counter-bored portion 24 of the barrel 5 and held in place by machine screw 25 feedable through the case 26 and provided with hemispherical-shaped inner end portions 2! by engagement into the recesses 28 around the periphery of the said clutch collar 23.

The case 26 is provided with a pair of longitudinally extending bores 29 therein at diametrically opposite points of the ease and each receives a plug 30 having a threaded bore therein for receiving a threaded member 32, the outer end of which is provided with the screw driver kerf 33. The other end of each of these screws 32 is pro vided with the reduced extension 34 for bearing engagement with the corresponding binding block 35 which is ribbed to bind against the threads of the corresponding screw 36, which screw is feedable radially with respect to the spindle 6 through a threaded bore in the plug so that its smooth reduced end portion 373 will engage in the recess of the corresponding semi circular hollow section 38.

These screws 36 have neck portions 38 which. ride in the longitudinal slots of the case 26 shown in Figure 3. Between the closed end of the case 28 which end is denoted by numeral 4i and the adjacent ends the plugs 30, coiled compressible springs 42 are interposed to maintain the plugs 20 urged to the right as shown in Figure 3 with the teeth 2I-2l of the socket tube 9 engaged into the recesses 22 of the clutch collar 23, thus establishing a drive connection between. the socket tube 9 and the barrel 5.

It can now be seen that in the normal opera-- tion of the holder, the releasing means will have no effect. However, in the event that tap, drill, or other tool, becomes stuck in the work, all that the operator has to do is to pull in the natural manner outwardly on the barrel 5. As a matter-of-fact the normal pulling outwardly oi the tool by gripping the barrel 5 will actually disengage the barrel 5 from the tool holding socket S at the clutch 2l--22 due to the yield of the springs 42 due to the movement of the case 6 as it is carried by the barrel 5.

While the foregoing specification sets forth the invention in specific terms it is to be understood that numerous changes in the shape, size and materials may be resorted to without departing from the spirit and scope of the invention as claimed hereinafter.

Having described the invention what is claimed as new is:--

1. A tool holder comprising a barrel having a chambered end, a tool spindle adiustably secured in the barrel and having a conical shaped end arranged outwardly of the chambered end of the barrel, a tool socket tube slidably received in the chambered end of the barrel with the spindle extending therein for the slidable support of said tube, means for securing a tool in said tube with abutting engagement with the conical shaped end of the spindle, clutch teeth on said tube, a clutch element mounted in the chambered end of the barrel to be engaged by the clutch teeth on sliding of the barrel towards the tool when engaged with work, and spring means carried by the barrel and connected to said tube and acting to engage the clutch element and the teeth and permitting the barrel to be manually moved to disengage the clutch element from the teeth while the tool is engaged with the work.

2. A tool holder comprising a barrel, a tool socket tube slidably connected with the barrel, means for securing a tool in the tube, a clutch element received by the barrel, clutch teeth on the tube for coaction with the clutch element, a casing mounted on the barrel and rotatably receiving the tube, securing means securing the casing on the barrel and the clutch element to said barrel, set screws slidably mounted in the casing, means rotatably connecting the set screws to the tube, adjustable stop blocks for said set screws and carried by the casing for limiting the sliding movement of the casing on the tube in one direction, spring means engaging the set screws and mounted in the casing for resisting the sliding movement of said casing relative to the tube in an opposite direction under manual force and normally acting to engage the teeth with the clutch element.

3. A tool holder comprising a barrel, a tool socket tube slidably and rotatably connected with the barrel, means for securing a tool in the tube, a clutch element received by the barrel, clutch teeth on the tube for coaction with the clutch element, a casing mounted on the barrel and rotatably and slidably receiving the tube, securing means securing the casing on the barrel and the clutch element to said barrel, set screws slidably mounted in the casing, means rotatably connecting the set screws to the tube, adjustable stop blocks carried by said casing to abut the set screws for limiting the sliding movement of the casing relative to the tube in one direction, and spring pressed followers mounted in said casing and the set screws to resist the sliding movement of the casing relative to the tube in an opposite direction and normally positioning the tube relative to the barrel to bring about engagement of the teeth with the clutch element.

EDWARD F. LOUGHLIN.

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