US968050A - Mechanism for adjusting cross-slides for taper attachments. - Google Patents

Description

B. M. W. HANSON.

APPLIOATION FILED 001213, 1906.

Patented Aug. 23, 1910.

R y W W 5 5% 2 5 2 4 y ,2 3 J, 42 q MECHANISM FOR ADJUSTING (moss sums r01: TA-PER ATTACHMENTS.

' (Qz'fnessee:

. UNITED STATES PATENT OFFICE.

BENGT M. W. HANSON, OF HARTFORD, CONNECTICUT, ASSIGNOR TO PRATT & WHITNEY COMPANY, OF HARTFORD,' CONNECTICUT, A CORPORATION OF NEW JERSEY.

MECHANISM FOR ADJUSTING CROSS-SLIDES FOR TAPER ATTACHMENTS.

To all whom it may concern:

Be it known that I, BENGT M. W. HAN- soN, a citizen of Sweden, having declared my intention of becoming a citizen of the United States, residing at Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Mechanism for Adjusting CrossSlides for Taper Attachments, of which the following is a specification.

This invention relates to turning lathes, and more especially to that class thereof, in which the tool is supported on a compound rest, and it has for one of its objects the provision of an improved mechanism for temporarily retracting the tool from the work, as for instance, during the return travel of the carriage or slide-rest when a screw is being cut, and without disturbing any adjustment which may exist between the slide-rest and the tool-slide.

My invention has, furthermore, for its object the combination, with such a mechanism, of a device which may be attached to the lathe-bed in a manner similar to, and for the same purpose, as what is ordinarily known as a taper attachment, so that the tool-retracting mechanism may be used with equal facility on either straight or tapered work.

In the accompanying drawings, in which similar characters denote similar parts, Figure 1 is a perspective view of a portion of a lathe equipped with my improved device. Fig. 2 is a central vertical section thereof, and Fig. 3 is a longitudinal section of the tool-retracting mechanism on line 3, of

. Fig. 2.

It may be stated at this time, that the mechanism for adjusting the tool-carrying slide relatively to and on, the cross-slide of the lathe, may be of any well-known or suitable construction, such mechanism being efiective merely for feeding the tool forward so as to take a deeper cut, and the drawings, therefore, do not show the feeding mechanism, but are confined to the retracting mechanism, only, the numeral 10 denoting the bed of the lathe having the usual main slide-rest 11 movable thereon longitudinally of the bed. Mounted on the slide rest 11, is a cross-slide 12 which supports the tool-carrying slide 13, with its tool-post Specificatioh of Letters Patent.

Application filed October 13, 1906.

Patented Aug. 23, 1910.

Serial No. 338,863.

14 and the cutting tool 15. The rear face of the bed 10 is provided with a groove 16 to receive a tongue 17 of a bracket 18, somewhat similar to the ordinary taper-attach- Inent bracket of well-known construction. Pivoted to the top surface of said bracket 18, and adapted for horizontal movement thereon, is a device for guiding, and controlling the position of, the cross-slide 12, this device being formed in the shape of trough 19, adapted to receive a shoe or block 20 which may be snugly fitted therein with the aid of a gib 21. (See Fig. 2). Near its center the block 20 is bored to receive a trunnion 22 of a yoke 23 which is slotted at 241 to receive a two-part bearing bushing 25 surrounding a wrist-pin or cam device 26 eccentrically disposed relative to the axis of its actuating-spindle 27 of which it is a part,

said slot being of sufficient length vertically to clear the bushing 25 in its highest position, a top-plate 28 being provided on the yoke to close said slot.

Referring now to Fig. 1, it will be obvious that the rear end of the cross-slide 12 is extended to form a pair of ears 30 which constitute bearings for the spindle 27 and one of which carries a screw 31 entering an arcuate groove 32 (see Fig. 3) of said spindle, for limiting the throw or rotation thereof to about 180 de rees, so that the total actual movement of the slide 12 will be equal to the diametrical throw of the eccentric-wrist-pin 26. Attention is di rected to the fact that when the spindle 27 is rotated in its bearings 30, its axis is shifted horizontally relatively to the vertical movement line of the axis of the wrist 25, this latter movement resulting from the circumstance that the yoke 23 is normally stationary so that the cross-slide 12 will be shifted on its ways with the spindle axis 27 for an amount proportionate to the rotation of the latter. It is evident that, when the guide-plate or trough 19 is disposed in parallelism with the movement of the main slide-rest 11, the cross-slide 12 will be maintained in its position thereon, unless the spindle 27 is partially rotated, as for instance, by a handle 33, so that, under such conditions straight work may be operated upon, as for instance, a screw, the toolslide being moved to retract the tool from the work, when the end of the thread is reached or whenever it may be desired to return the slide-rest to the starting point.

The tool-retracting mechanism above described is equally applicable to tapered work, in which case the guide-plate 19 should be positioned in parallellism with the front face of the work, on which the tool is operative, such position being obtainable by virtue of the adjustability of the plate 19 on the bracket 18, by an adjustin screw, such as illustrated at 34 in threa ed engagement with an ear 35 on the bracket. The plate 19 may be secured inits adjusted position by clamp-screws 36 the heads of which are movable in slots 37 provided in the plate 19 (see Fig. 1).

The member or taper 19 is adjustable as will be obvious and it may be set to be parallel with the axis of motion of the work or the longitudinal axis of the machine bed or it may be adjusted at an angle to either of said axes. When said member 19v is parallel with said axes the result will be straight or cylindrical work while if the same be arranged at an angle to said axes I can obtain taper work. The cross slide 12 will of course follow a path agreeing with the disposition of said member 19. If the latter be in parallelism with either of said axes the slide rest will follow a path coinciding with said axes while if the said member 19 be angularly adjusted the slide rest will take an angular path corresponding to the disposition of said part 19.

Many changes may be made in the particular construction, and also in the organization of some of the cooperating elements without departing from the spirit of the invention; and while the preferred form of the block or shoe 20 is that shown and described, it should be understood that a roller may be substituted in lieu thereof, this latter construction being especially adapted for irregular Work.

Having thus described my invention, what I claim is:

The combination of a cross slide, an angularly adjustable taper bar, a shoe to engage said taper bar and to be guided thereby, a slotted member pivotally connected with said shoe, the cross slide having an opening to receive said slotted member, a bushing in the slot of said slotted member, and an oscillatory spindle supported by the cross slide and having an eccentric portion fitted in said bushing.

In testimony whereof I'afiix my signature in presence of two witnesses.

BENGT M. W. HANSON.

Witnesses:

JOEL W. JOHNSON, SoLoN E. DAVIS.

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