US1265269A - Automatic feed mechanism for drill-presses. - Google Patents

Description

G. SIPP.

AUTOMATIC FEED MECHANISM FOR DRILL PRESSES.

APPLICATION FILED JULY 10.1911- Patented May 7,1918.

4 SHEETS-SHEET 1 mmvmn,

I ATTORNEY- (3mm Stpp WITNESS G. SIPP; AUTOMATIC FEED MECHANISM FOR DRILL PRESSES.

APPLICATION man lUtY 10. m1. 1,265,269, Patented May 7,1918.

. 4 SHEETS-SHEET 2.

INVENTOR, Gm Sig A ITO/MEI G. SIPP.

AUTOMATIC mo MECHANISM ron nmu mssss.

APPLICATION FILED )ULY I0, 19]]- Patented May 7,1918.

4 SHEETS-SHEET 3 'INVENTOR, Grant Sip}.

I an ATTORNV- Ill WITNESS e. SIPP. AUTOMATIC-FEED MECHANISM FOR DRILL PRESSES.

APPLICATION FlLED-IULY W. I911- Patented May 7,1918.

4 SHEETSSHEET 4 INVENTQH, Graflt Sill,

l I ATTORNEY WIT/V588 UNITED STATES PATENT OFFICE.

GRANT sum, or PATERSON, NEW JERSEY.

AUTOMATIC FEED MECHANISM FOIlryDBILL-PRESSES.

To all whom it may cpncern:

Be it known that I, GRANT SIPP, a citizen of the United States, residing at Paterson, in the county of Passaic and State of New Jersey, have invented certain new and useful Improvements in Automatic Feed Mechanisms for Drill-Presses, of which the following is a specification.

Drill presses in which the drill spindle is power-driven to perform its thrust-movements are of three known types to wit, (1)

where the drill spindle is power-reclprocated constantly, (2) Where the drill-spindle is brought down to a certain point manually provement on the first and second in that on the one hand the movements of the drillspindle are subject to manual control and on the other require only one of the attendants hands to be occupied. My present invention represents a further advance in the art, notably in this that whereas as in the third type the movements of the drill-spindle are subject to manual control and such control involves the occupation of only one of the operators hands, the coupling of the drillspindle with the power-drive mechanism is dependent not on contact of the tool with the work but on the drill-spindle first moving a definite distance under manual influence. Thus in a practical application of my invention, since the coupling occurs entirely without reference to contact of the tool with the work and the utilization of incidental resistance to effect it, it may very desirably be adapted to occur just before the contact accrues,whereby the tool comes to the work subject to a constant, power drive effort, the operator is saved the fatigue incident to overcoming resistance in order to eifect'the coupling, less skill is required on the operators part, and certain other advantages obtained which will be evident to those skilled in the art.

In the accompanying drawings, v Figure 1 is a front elevation of a drillpress embodying my improvements;

Fig. 2 is a fragmentary top-plan view thereof;

Specification of Letters Patent.

Fig. 3 is a horizontal sectional View on substantially the line 3-3 of Fig. 1

Fig. 4 is a side elevation of a fragment of what is shown in Fig. 1;

Fig. 5 is a sectional view on substantially line 5 -5 of Fig. 1;

Fig. 6 is a side elevation of what appears in Fig-5, a part of casing w being broken away to show internal mechanism Fig. 7 is a sectional View on line 77 of Fig. 6; I

Fig. 8 shows the coupling in side elevation,

partly in section, and its master memberand casing; I

Fig. 9 is a sectional view'on line. 99 of Fig. 8; and

Fig. 10 is a detail of Fig. 8, showing the master member retracted.

The drill press in connection with which the invention is herein illustrated is one of a type patented to me under Letters Patent No. 1,167,440, a being the pillar and b'li the spaced horizontal head members of the frame of the machine, a the forward pulley of a belt-and-pulley driving means arranged in said head members, d the drill spindle splined in the sleeve 6 which affords the journal part of said pulley, f the sleeve through which the spindle downwardly projects, being rotative therein but confined against vertical movement relatively thereto by the collars f, f thereon, g the frame arm, adjustable up and down on the pillar, in which sleeve 7 is splined, k the work table, 2' the chuck for the tool suitably attached Patented May 7, 1918.

7 Application filed July 10, 1917. Serial No. 179,675. i

the'lower end of the spindle-the sleeve,

weight having a flexible connection extending up over pulleys and then down-and suitably afiixed to the carrier, as in my aforesaid Letters Patent (the said flexible connections being actually illustrated herein at 0 in Fig.

7), or a spiral spring 1) coiled within the head m, (which is formed as a housing for the spring) and having one end attached to the head m and the'other to the arm g, orboth of these instrumentalities;

'In the adaptation herein shown the coning means and a power transmitting conpling to connect the carrier with the driving means which will now be described.

A bracket 9, which it will be appropriate to form as a housing at r, is bolted to and projects from the head member 5 laterally thereof. It affords. bearings for a vertical rotary shaft 3, said shaft and the sleeve 6 being equipped with cone pulleys t at around which extends a belt 1), whereby the rotation of the sleeve will be transmitted to the shaft 8. A casing or housing w, having a removable cover plate w (Figs. 5 and 6), is suit-' ably secured to the side of frame-arm g and affords bearings for a vertical shaft :0 which is step ed on an anti-friction bearing and has afiixed to it a worm a and a co lar 2 (Fig. 6), the step bearing, worm and collar fitting between opposed abutments 3 (Fig. 8) in the casing and so confining the shaft against vertical movement relatively to the casing. The shaft m extends up through the housing 1 and is rotated from shaft 8 through the gearing 4: shown in Figs. 3 and 4, with one member of which shaft w is preferably splined so as to permit vertical adjustment of the frame-arm g.

/Shaft j has a reduced extension 5 on which is freely revoluble a gear member 6 which comprises peripheral worm teeth 7 and peripheral gear teeth 8 (the teeth 7 and 8 being formed in the illustrated construction as two separate parts keyed together at 9). Keyed on the shaft is the hub 10 of a face plate 11 to which there is afiixed, spaced therefrom by disks 11 and concentric with the shaft, an annular plate or ring 12; the means for securing ring 12 to the face plate may be screws 13. 0n studs it supported at their ends by the ring and face-plate are journaled pinions 15, meshing with gear teeth 8. 16 is a gear having a hub 1.7 journaled between and concentric with the hub 10 of the face plate and the bearing portion 18 of the easing to, the same comprising an interiorperipheral series of gear teeth 19 and an exterior peripheral series of teeth 20, in the form (Fig. 8) of ratchet teeth. (A collar 21, secured in bearing portion 18, prevents displacement of shaft j to the right in Fig. 7 by affording an abutment to the face plate, which is keyed on the shaft, as stated). T he interior teeth 19 mesh with the pinions 15,

and 15 will constitute planetary gearing and so shaft j will be driven through the face plate, and with members 16 released, rotation of member 6 will be transmitted to member 16 through the pinions 15 without affecting the face plate, all as substantially in a well known type of differential gearing. Forv controlling the member 16 there is pivoted in the casing to on a shaft 22' parallel with shaft j a two-armed pawl 22, one arm of which has a hook 23 to engage ratchet teeth 20 of member 16 and the other arm a stud 24. Pinned to shaft 22', which may rock in its bearings, is a cylindrical socket 25 containing a plunger 26 spring-pressed outwardly and pivotallyconnected with one arm of a lever 27, the other arm of which protrudes from the casing; a spring 28 connects the pivot forming the joint between the pawl and lever 27 with the stud-carrying arm of the pawl. formed by the members 25', 26 and 27 the A. spring-toggle is thus limit of whose movement in either direction is determined by contact of one of the pawl arms with the member 16; spring 28 normally holds 24 bearing against 25, and if the hook 23 should impinge against a high part of one of the teeth 20 the spring 28 permits the incidental toggle-movement to be completed nevertheless. Exterior of the casing shaft 22 is equipped with a fixed arm 29.

The shifting of the pawl through the medium of the spring-toggle is effected from the tool-carrier thus: A collar 30 (to which the flexible connection 0 may be attached) is fixed on the sleeve f and has suitably held therein a depending rod 31 which slides up and down in a fixed guide 32 of the casing w. In a collar 33, suitably affixed to the rod, is pivoted a dog 34 whose inner arm is normally held by the weight of its longer outer arm in the horizontal position 36 adapted to be adjusted vertically thereon by a clamp screw 37, said strap having a toe 38 which, a predetermined time after dog 34 shifts the toggle and pawl to the position shown in Fig. 8, -impinges the arm 29 and shifts the toggle and pawl to the position shown in Fig. 9.

' a going driving means, the elements d, f, 9'

and 11 as a tool-carrier-includin driven means movable back and forth, an the elements 15 and 16 and pawl '22 as a couplin for operatively connecting the dr'ivingand driven means having a moving master member (the pawl) movable to one position to make or establish and to another to break or disestablish the coupling. Under the 'pull of the connection 0 or the torsion 0 spring 10 the carrier is normally held with collar f abutting the frame arm g.

When the carrier is elevated the master member stands as shown in Fig. 9. Onthe operator turning shaft j to depress the carrier the dog 34 at a certain point-in the descent of the carrier will trip the toggle,

as explained, so that the master member 22 comes to the position (Fig. 8) to lockthe gear member 6 against rotation, thus making or establishing the coupling so that the power of the going driving means will be transmitted to and continue downward the carrier; the carrier will continue downward, power driven,to a point (predetermined by adjusting up or down strap 36) where toe 38 impinges and trips back the toggle so that the master member returns to the position (Fig. 9) to release gear member 16, thus breaking or disestablishing the. coupling, and, the carrier being now free, returns to theelevated position, the dog 34. wiping idly past the lever 27., The power applied to the tool is thus not only of a constant character while the toolis at work work A (Fig. 1).

, inglor downward stroke of the carrier.

but is cut off at a definite point, I

Adjustability ofthe collar 33 on rod 3 will vgenerally be unnecessary. That is, usually the dog 34 will stand a fixed distance above the lever 27 when the carrier is fully elevated whatever the height of the The attendant, to adjust the machine for different heights of work, sets the frame arm 9 up or down as usual, always preferably allowing such a space between the point of the drill and'the work that when the latter descends the drill spindle will be coupled with the power drive just before the spindle contacts with the work.

Adjustment of the strap 36 up .or down obviousl determines the depth of the hole drilled adjustment down reducing and ads justment up 'incr'easingthe depth of cut) by varying the time-interval occurring between the actuating of the toggle device first by the dog 34 andthen by toe 38 on theworkavin thus fully described my invention, what I c aim as new and desire to secure by Letters Patent is: v 1. In combination, the frame, a tool-carrier-including means movable in a definite direction therein, a going driving means, and a power-transmitting coupling to con nect said means with each OthGPlllQllldiIlg a master member movable to one position to ,make, and to another position to break, the

coupling and normally occupying one of said positions, said first-named means having 4 means to move the master member during the movement in one direction of said first means.

2. In combination, the frame, a tool-carrier-including means movable in a definite direction therein, a going driving means, and a power-transmitting coupling to connect said means with each other including a master member movable to one position to make, and to another osition to break, the coupling and normal y occupying one of said positions, said first-named means having means to move the master member from the latter position and back again during the movement in one direction of said first means. a 5

3. In combination, the frame, a tool-carrier-including means movable in a definite direction therein; a. going driving means,

and a power-transmitting couplin to connect said means with each other including a master member movable to one position to make, and to another position to break, the coupling and normally occupying the latter position, said first-named means having means to move the master member from said latter position and back again during the movement in one means.

' 5, In combination, the frame, a tool-carrier-including means movable forward and back therein, a going driving means, and a power-transmitting couplin to connect said means with each other inc uding a master member movable to one position to make, and toanother position to break, the coupling and normally occupying the latter po= direction .of said first sition, saidfirst-nained means havin means tomove the master member from said latter position and back again durin the movement of said first-means in t e forward 1 direction.

k '6. Inv combination, the frame, a tool-carrier-including train including a rotary driven member. a driving gear memher, a free rotary gear, said members and the gear being concentric, a pinion meshing with the gear and journaled in one and meshing with the other of said members, and a rotation preventing detent device for the gear movable into and out of locking relation thereto and actliable by a part of said train In combination, the frame, a tool earrier-including means movable in a definite direction therein, a going driving means, and a power-transmitting coupling to con- 7 nect said means with each other including a fulcrumed master member movable to one position to make, and to another position to break, the coupling and normally occupying one of said positions, said first-named means having means to move the master member during the movement in one direction of said first means.

8, In combination, the frame, a tool-can rier including means movable in a definite direction therein, a going driving means, and a ower-transmitting coupling to corn nect said means "with each other including messes a toggle device movable to one position to make, and to another position to break, the coupling and normally occupying one of said positi ns, said first-named means having means to 1- ove the toggle device during the movement in one direction of said first means. i

9, In combinatiom'the frame, a tool-carrierincluding means movable in a definite.

direction therein, a going driving means, and a power-transmitting coupling to connect said means with each other including a master device movable to one position to make, and to another position to break, the coupling and normally occupying one of said positions, said first-named means including a device to move the master device durin the movement in one direction oi said rst means and one of said devices being adjustable relatively to the other longitudinally of the path of travel of said first means,

In testimony whereof I afix my signature.

' enan'r sirr,

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