US1067137A

US1067137A - Universal taper attachment.

Info

Publication number: US1067137A
Application number: US72832112A
Authority: US
Inventors: William Schellenbach
Original assignee: Individual
Current assignee: Individual
Priority date: 1912-10-28
Filing date: 1912-10-28
Publication date: 1913-07-08
Anticipated expiration: 1930-07-08

Description

W. SGHELLENBACH.

UNIVERSAL TAPER ATTACHMENT.

APPLIUATION FILED 0UT.28, 1912.

Patented July 8, 1913.

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00 m. J d e Lb n na DI W. SGHELLENBAGH. -TJTHVERSAL TAPER ATTACHMENT. APPLICATION FILED 00T.28, 1912.

TTT TMTNT WILLIAM SCHELENBACH, OIF lEI.AR/.lVlEl'lIay OHIO.

UNIVERSL TAPEE ATTACHMENT.

Specication of Letters Patent.

Application led ctober 28, 1912. Serial No. 728,321.

Patented July 8, 1913.

To all whom, t may concern:

Be it known that T, WILLIAM SCHELLEN- BACH, a citizen of the Umited States, residing zit-Hartwell, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Universal Taper Attachments, of which the following is a specification.

This invention relates to improvements in means for turning tapers, and in a .more concrete sense it is concerned with an instrumentality that may be applied as an attachment, to an engine lathe to facilitate the production of tapers of various sizes and conforming to various standards.

One object within the contemplation of this invention is to render available a taper forming mechanism of a relatively simple character and so adjustable a's to be in the nature of a universal instrument' enabling an operator without loss of time to set the same forcuttingtapers within a wide an- V gular range.

forming to the'standard in which tapers Anc-ther object of this invention is to devise a compact'- arrangement in which, notwithstanding the usel of a 'relatively short taper bar, it will be possible easily to out tapers of a length exceeding that of the taper bar. Y

AL stillifurther object is to render available a taper cutting attachment for the carriage of such' a character that steep tapers may be made with heavy cuts without imposing on "the carriage strains tending to twist-the same at an angle to the guides of the lathe bed and thus tend to develop inaccuracies in the work.

YAnother object is to provide an instrumentality of thecharacter specied that embodies simple and adjustable means wherebythe same may be quickly-set t-o cu't tapers accuratelyfconforming either to the 'sta-ndard requiring a givenu number of inches or fractions thereof .per foot, or accurately conare expressed in terms of degrees.

Another object isto create a simple taper cutting Aattachment applicable for cutting long or short gradual tapers and equally applicable forcutting abrupt tapers.

@ther objects will be in part outlined in the following description and in part rendered apparent therefrom invco-nnection with the drawings hereto annexed. l

lin order that this invention may be made more readily comprehensible to those skilled in this art, drawings illustrating one of the` j many possible embodiments thereof have been appended asa part of this disclosure,

and in such drawings like characters of ref` erence denote corresponding parts throughout all t-he figures, of which Figure l represents a plan View of a taper cutting attachment embodying the several features of this invention as applied tothe bed of a lathe. Fig. 2 is a partial horizontal section taken along -line 2 2 of Fig. 4, showing the arrangement of a micrometer adjustment, such as may be used for moving the taper bar accurately into any predetermined position. Fig. 3 is a section taken along line 3-3 of Fig. l, showing further details of this arrangement, and Fig. 4 is a section taken along line i-ll of F ig. 3, showing other details.

Continuing now by way of amore complete disclosure of the underlying principles and features of this invention, it may stated that the description, while dealing largely with specific features is to be taken in -an illustrative or explanatory Sense, rather than ina limiting sense, inasmuch as the features of the invention mayassumedifferent forms from that shown, as will be readily comprehended .by those skilled in the art in the light of this disclosure.

It will r`suffice to show this mechanism in connection with certain parts of an engine lathe, without entering intol a detailed description of the conventional lathe elements.

The bed of the lathe,ihavingvthe usual guidel Ways formed thereon, is indicated by l, and slidably arranged in al suitable manner on suchguide ways is a base 2 of the tool carriage. This base provides a transverse slide 3 in which is mounted the part et that in turn, through a conventional tool post arrangement, carries the cutting tool 5. The

4part 4; has a depending lug 6, through which passes thescrew-threaded shaft 7 forming a `feed screw that terminates ,in an operating handle 8. It will be understood that as the work carried by the spindle of the head stock revolves through a suitable lead screw, the base 2 f the carriage is caused to slide longitudinally on the ways offthe lathe bed. During a hand operation, the screw 7 is rotated without translating, and during an auto-matic operation it is translated without,

rotating. Fixed to the rear of theA carriage base 2 isa casting 9 having lugs 10 through which. pass the boltsv 1l, holding the same guide wav 12 extending parallel with the guides ofithe lathe bed.

The traveling support for. the taper barA consists of a member 13 that has a dovevmany inches per foot.

tailed portion 14 interfitting with the slide 12, and it extends forwardly, and has fixed thereto a rack 15v by means of the screw 16. This rack is used either .whenAshortsteep tapers or long gradual tapers are to be cut, as presently will be described. Pivoted at its center to the member 13 by means of a pivot pin 17 is a taper bar 18. This taper bar is shown adapted to be swungV in either direction through an angle of about fifteen degrees from a position parallel with the lathe bed guides, and means are provided whereby the angular position of this taper bar may be determined either in degrees or according to the standard expressed in so hand end of the member 13 is'a scale 19 that is arranged in the arc of a circle with the pivot pin 17 at its center, and thisscale denotes degrees, so that the taper bar 18 may4 be swung about to bring a suitable mark thereon in coincidence with any of the divisions of the scale, and thus insure a predetermined angularity of the taper bar expressed in degrees with respect to the guides of the? lat-he. This scale 19 has its zero line at a position such that it will coincide with the mark on the taper bar 18 when the lat-ter is' exactly parallel with the guidesfof the lathe bed, and from this point the scale reads in both directions.

At the oppositeend of the taper bar there is arranged on the member 13 a scale 20 that indicates the taper in inches and fractions thereof per linear foot along the center-line of the lat-he. This scale is set perpendicularly to the guides of the lathe bed, and projecting from the extremity of the taper bar is an indicator or finger 21. This finger, as' shown more clearly by Fig. 4, is springpressed, so as always to contact with the 'edge of the scale 20 (t. e. at the ends of the divisions) irrespective ofthe angular position of the taper bar 18. By this means, the

operator is enabled to shift the taper liar to bring the finger 21 opposite any one of the gradations on the scale, say 1% inches from the center line, and the taper bar will therefore'slant at an angle measuredin terms of 1% inchesto the foot. To lock the taper bar in its angular position,after being set, the clampk nuts 22 and 23 are provided, and to enable the operatr to have a more sensitive con-trol in positioning the taper bar, the mlcrometer screw 24 may be utilized. This will be understood more clearly by referring to Fig. 2 in which 25 indicates a segmental rack xed to the taper bar by means of the Vrelative movements therebetween.

Thus, at theleft bolt 23. A worm 26 controlled by the micrometer screw determines the position of the rack, and a spring-pressed detent 27 may be used to hold thev worm of micrometer screw against the teeth of the rack to take up back-lash and wear. \The parts thus described in connection with the taper bar and the mounting therefor, will, when used in cutting gradual tapers not longer than the taper bar, be held stationary so that the carriage, together with the cast-ing 9, will move longitudinally with respect to the same. To hold suchparts stationary, a bracket 28 extends from the lathe bed andmay be locked against movement thereon by means of the hand clamp 29. A bar 30 extends from the member 13 tothe bracket 28, and prevents It will shortly be explained that when short abrupt tapers or gradual tapers longer than the taleased, so that the member 13 may be caused to travel at a rate different from that of the carriage.

Bolted to the casting 9 isa top plate 31 inf which normally slides a member 32 that has ajdepending lug 33, to which is rotatably secured the end of the feed screw 7. Pivoted to;` .this member, 32 by means of a pivot pin 17', is a slide block' 34 that ,slides on thev taper bar 18. Thus, when the carriage feeds along the lathe bed guides, if the taper bar 18 is held stationary, or travels faster or slower, the block 34 will slide therealong, and be moved in or out according to the relation existing between the angular position of the taper bar and its movement with respectV to the carriage. This results in a corresponding movement of the feed screivvr 7 and carries the tool into or out of the work at a rate correspondingto the setting of the taper bar18. Should it be desired to move thel tool by hand the bracket 28 is freed from the lathe bed, and, the clamp nut 35 is tightened to prevent the block 32 from sliding, thus holding the feed screw 7 against translation and permitting it to be rot-ated by hand, so as to feed the tool as desired.

It will be observed that when the taper bar is `locked to the lathe bed, -it may'only be used to cut tapers equal in length to that of the taper barand having a maximum slope of about fifteen degrees from-the axis, but should it be desired to cut steeper tapers of a shorter length, or gradual tapers of a greater length, the bracket 28 is freed by means of the handle 29, and gearing is used to cause the taper bar and its supporting member 1,3 to travel faster or slower than the carriage. To this end, there is in the apron of the carriage a gear 36 that receives motion from the,leadscrew or rack in a suitable'4 manner. This gear is loosely journaled on a shaft 37, but by means of a clutch 38 actuated through the part 39, it may be iso mei/,187

.locked to such shaft. This enables gear 40 to. berevolved anddn-turnrotates gear 41' and the shaft ll2,extemiling throughthe base.

ofthe carriage and terminating ina gear 4,3

that meshes with. rack 15, The gears .40 and 41 are replaceable by others so. as to enable' .the speed ratio .to be. varied to' any extent desired. Now, when gear 43 is positively driven by tbe-means. above specified, 1t is evident that ral 15 will be moved relatively to the carriage, either fasterior'slower as the: c ase may be, and'vca-rry with Vit the.=membe1. For L It will thus be perceived that this invention, although of a simple character, is well adapted to achieve the objects and ends aforesaid. It will be understood that. the same may be subject to considerable rearrangement and that certain parts may be used withoutvothers, without departing from the spirit of the various aspects of this invention. y

l therefore claim as my invention and desire to secure by Letters Patent of the United States :--v

1. A mechanism of the nature disclosed combining a bed, propelling means on one side thereon the ltraveling carriage, a tool post movable on said carriage, a member located remote from said propelling means adapted to be moved relative to said carriage,'means connecting said tool post with said member, and `means operative through said carriage from said propellin means for moving said member at a. ratev di erent from v that of said carriage when the latter travels, whereby'said tool post may be moved on said carriage.

2. A mechanism of the nature, disclosed 'combining a traveling carriage,'a tool post movable on said carriage transversely' to its direction of travel, a member at the rear o said carriage movable in the direction of travel ofy .said carriage and havinga slideway disposed at an angle to the direction of" travel, means connecting said tool post with said slide-way whereby the former may be moved by the latter, and means extending rearwardly to said member from the yapron of said carriage for moving said member ata rate diierent from that of the traveling carriage.

3..A mechanismiof the nature disclosedcombining ajbed having 4a rack traveling carriage, a tool post movable thereon, a member movable on said carrlage 1n a direction of travel thereof, an angularly adJulst- .nectedwith the latter in -able bar oni said member,..at connection betweenfthe tool post and said .bar whereby the ,latter may control the position of the former, means mounted on said carriage and intervening between said rack and member for. moving said member ata rate dilerent from. tha-trofl said traveling carriage, and means for, translating said lcarriage and conclose. proximity with' said rack.

A'. A mechanism of the nature disclosed' combining a traveling carriage, a tool post -movable -transversely thereon, a ymember vmounted` on said carriage .to slide. thereon transversely' with the movement of said tool post, a bar angularly adjustable' on said Lmember, connections between said bar and tool post, a shaft journaled transversely in said carriage and geared t`o said member,

means adapted to be engaged with said shaft to move said member at a predetermined rate different from that ofsaid traveling car-- riage, means adapted to cause said member to move as unit with said carriage, and means adapted to be engagedto hold said member stationary during the travel of said carriage.

5. A mechanism of the nature disclosed combining a traveling carriage, a memberl slidably mounted thereon and having a rack, a speed change gearing operative "through said carriage and connected with said rack to move'said member relatively to said carriage, a bar adapted to be adjusted angularly onsaid member, a tool post slidable on loo' said carriage, and a'connection extending from said tool post into afsliding engagement with said bar, whereby said tool post may be moved at a rate determinedby the angularity of said bar and the rate of movement of said member relative to said carriage.

6. A mechanism of the nature. disclosed combining a. traveling carriage, clutch oontrolled gearing'mounted at the apron of said carriage and adapted to be drivenv at a rate corresponding to or proportionate withV the rate oft-ravel yof said carriage, a shaft ex-v 7 'i tending from'said gearing' transversely to' the rear. of said carriage and terminating in a gear, a member slidably mounted at 'the rear of said carriage and having a rack meshingwith said gear, a bar pivoted to said member and, adjustable angularly thereon, a tool post movable on said carriage, and connection extending from said -tool post and terminating 'in a sliding fit with said bar. Y

' 7. A mechanism of the nature disclosed combining'a guide bed, a traveling carriage thereon, a member slidably mounted on said carriage", gearingextendingfromsaid guide bed through said carriage to said member to move the latter atJ a rate proportionate tothe travel 4of said carriaga'a bar angularly adjustable on said member, a, tool posty movable on said carriage, and means for enabling said bar to determine the position of said-tool post. 1

8. A mechanism of the nature disclosed combining a guide bed having a rack, a carriage traveling thereon, a member slidably mounted on said carriage and also having a rack, gearing mounted on said carriage and in mesh with each of said racks; a tool "post movable von said carriage, andv meanslfor enabling the movement of said member relative'to said carriage to determine the rate of movement of said tool post on said carriage.. A

9. A mechanism of the nature disclosed' combining a traveling carriage, a tool post movable thereon, a pivoted slide-bar adapted to be angled, a scale loca-ted at one end spaced graduations `terminating *atV said straight edge, means carriedby the end of said. plvoted` bar coperating with the stralght edge of said scale to enable'the center line of said pivotedbar to be interseetedu with any of said graduations at said straight edge, and means connecting said -tool part with said bar whereby the position of the former may be controlled by the latter. l

In testimony my hand.

`W'ILLIAM SCHELLENBACH. Witnesses:

OLIVER B. KAISER,l

CLARENCE B. FOSTER.

whereof, I have hereunto set