US171493A - Improvement in machines for dressing tfle heads and pointing and threading the - Google Patents

Improvement in machines for dressing tfle heads and pointing and threading the Download PDF


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US171493A US171493DA US171493A US 171493 A US171493 A US 171493A US 171493D A US171493D A US 171493DA US 171493 A US171493 A US 171493A
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    • B23B5/00Turning-machines or devices specially adapted for particular work; Accessories specially adapted therefor
    • B23B5/14Cutting-off lathes
    • Y10T29/00Metal working
    • Y10T29/51Plural diverse manufacturing apparatus including means for metal shaping or assembling
    • Y10T29/5168Multiple-tool holder
    • Y10T29/5175Oscillating tool
    • Y10T408/00Cutting by use of rotating axially moving tool
    • Y10T408/50Cutting by use of rotating axially moving tool with product handling or receiving means


4 Sheets-Sheet 1.
No.171,493. Patented Dec. 28, 1875.
N 22 I 3 02 O on g Q a E a m 2 S 0 h 8 K 6 WhLKba. j 6' '6 WM INVENTOR- NJETERS. PHOTO-LITHOGRAPNER, WASHKNGTON, D C.
Y I 4.Sheets-Sheet 2 w. E. WARD. MACHINE FOR DRESSING THE HEADS AND ronmue AND THREADING THE SHARKS OF BOLTS. N0.171,493. Patented Dec. 28, 1875.
pi lii fllllllllllllllllllll I III! l 5 mm mmy a T ELQ) Sheets-Sheet 3.
j Z 6 W 7 I V WITNESSESI 4Sheets-Shet4. W. E.-WARD.
Patented Dec. 28, 1875.
Specification forming part of Letters Patent No. 111,493, dated December 28, 1875; application filed August 9, 1875.
To all whom it may concern: I Be it known that 1, WILLIAM E. WARD,.0fi Port Chester, in the county of Westchestcr and State of New York, have invented a} new and Improved Machine for Pointing, Threading, and Dressing the .Heads of Bolts ,j and I do hereby declare that the following specification, taken in connection with the drawings making a part of the same, is a full, clear, and exact description thereof.
My invention relates to the machinery nec essary to turn out a finished bolt from a com-. mon forged blank, appropriate for the same,
and comprehends devices and combinations -for performing the operations of selecting the blanks, one at a time, from a row; presenting the blanks, one after another, always in the same position, to revolving griping-jaws, and
at a definite distance gaged'from the under side of the heads of the blanks; pointing their ends; threading their shanks cotemporanevously with either the pointing or threading operations, or both dressing their heads; and,
such as is well known to constructers of screwcutting machinery, and which is to be supplied by hand, or by any suitable self-operating teedingmachinery, with blanks which have been properly forged and headed. The row of blanks in the guide, with the exception of the last one at the bottom, issupported, when the machine is about to take a blank, by means of a vibrating toothed cut-off check 2, Figs. 2 and 4. Underneath the delivery end of the railway-guide is located a vibrating table of peculiar construction. Its surface is a section of a solid cylinder, 3, Figs. 4 and 6, with the exception of its front edge, which is a section of a hollow cylinder, 4, and this latter forms a curved lip or pocket ofsufficientdepth to receive the blank without any part of the same'being above the portion 3 of the surface of the table.
The table is pivoted to the frame of the machine at 5, Fig. 4, and has a vibratory movement given to it by means of a cam, 6, Fig. 3, which moves a long sliding bar, 7, upon the front end of which is an inclined plane, 8, and which latter, Fig. 4, coming into engagement with a friction-roller, 9, on the radius arm 10, of the table, vibrates-the latter in one direction, while a spring, 11, when the influence of the inclined plane 8 is removed, vibrates it in the opposite direction. When the table is moving forward with a blank in the holder 4, the cylindrical surface 3 of the table supports the column of blanks in the guide, for the reason that the cutoff check 2, which is only operated by the combination of the table during its backward movement with the arm 12 which controls the closing of the check, is withdrawn by the action of springs 13, and thus a new blank, resting upon the surface of the table,
is always in readiness, upon the return movement of the table, to be separated from the others in the row by the cut-off check described.
The vibrating table is moved forward far enough for the axis of the hollow semi cylindrical blank-holder 4 to coincide with the axis of the griping-jaws, and the next operation to be performed is the insertion of the blank into such jaws. An adjunct of the holder 4 is a scroll-guide, 14, composed of two members which are counterparts and held together by spring-pressure. ()ne of the members is shown at Fig. 7, and the combination of the device with the blank-holder 4 is shown clearly at Fig. 6. The office which is performed by it is to cause each blank as it is pushed outof the holder toward the jaws by the follower-rod 15, and through the scroll-guide, to be turned axially far enoughto ensure the squared portion under the head standing in a .position'. corresponding with the position which the open jaws will occupy. The follower 15 is operated at the right time to push the blank out of the holder and through the guide by means of the cam 16, Fig. 1, located on the transverse shaft B. The cam 16 gives movement to a lever, 17, Fig. 2, pivoted to a downhanger,
.C,;fron1 theframe of the. machine at 18, and
. lowerwod.
this lever gives movement to the long rod 19, Figs. 2 and '3, whereby the lever 20 is worked, with which the follower-rod is connected.
As before suggested, the griping-jaws must. always stand in a position corresponding with side of this ring is pivoted one or more spring.
pawls, 22, and notches, with which the said pawls are intended to engage, are cut in the periphery of the circular head or revolving journal in which the jaws are mounted. A flexible cord or chain, 23, is attached to the ring 21, and at its free end sustains a weight,
24. Acontinuation of the cord beyond the point of attachment to the ring is made, and its end is linked to the treadle-lever 25, Fig. This treadle-lever is underthe influence. at certain times of a cam, 26, on the trans- :verse cam-shaft B, and at theproper moment,
before the blank has been introduced into the jaws,it acts to cause the pawl on the ring 21 toengage with some one of the notches inthe journal-head and cause the jaws tobe rotated until they come to the proper position.
The effect of the weight is, when the treadlelever is relieved from the influence of the cam, to rotate the ring in the opposite direction from that in which it moves to engage with the notches, and cause the pawl to ride up.
X the surface of a projecting pin, which elevates allow M001 tobe brought up,-to do the work.
Theextent, therefore, to which the blanks are to be entered in the jaws, is to be determined by amovable gage, against which the under side of thehead of the blankbrings up, when theblank is pushed into the jaws by the fol- This gage 27 is shown at Fig. 5. It is a flat plate of metal ,of a hook shape, with its upper front edge made V shape to conform .to two sides of the squared neck of the blank. The longer arm of the gage is mounted on a stud, 28, and a spring located underneath the frame tends to keep the gage in the position shown at Fig. 5. In combination,flhowever,with the gage is a lever, 29, Fig. 3, which is under the control of the cam 30, Fig. 1, on the shaft B, and which, after the gage has performed its office, causes it to move out of the way. The gage should also have a capacity, by means of a spring, to move laterally, so as to present a yielding resistance to the thrust of the follower-rod 15 in push ing,the.blank into the. jaws, such springcaus soon as the follower begins its retreat. In combination with such spring, to allow lateral movement, there should bea fixed stop to limit the action of the spring upon the gage in the opposite direction. j
The blank having been inserted in a pair of jaws, as above described, it is griped by 3, which work,'through connectingrods, toggle-levers combined with the jaws, whenever such springs are permitted to act for that purpose by the cam 32, Fig. 1, which controls the ter, obeying the action of the cam-compresses or releases the springs 31, and thereby determines when and for-how long theblank shall be griped by the jaws.
The first operation performed by the machine afterthe blank .has been griped bythe is done by means of a. stationary burringtool, which is moved np,to andinto engagement with the end of \therevolving blank.
of the machine will be to cut the thread Lupon the blank, it follows that a greatadvantage infavor of a simple organization of the machine will be obtained if one system of mechcut the thread, to bring them, respectively,
rate functions. The accomplishment, of this constitutes one of the characteristicfeatures arranged in the arc of acircle, of which the hinged support F, Fig. 1, for the spindle of a fragment of it at Figs. 9 and 10.
Referring, now, to Fig. 10,it will be seen the down-hanger frame 0, Figs. 2 and 3, will, from its connection at its upper end with the spindle 38, cause thelatter to be moved forward or backward as such lever is vibrated. Upon the side of the said vertical leveris set an inclined plane, 40, and in combinationwith this inclined plane is a roller, 41, mounted on an adjustable stud-pin, set in a slot in a hinged lever, 42. A coiled spring, 43, exerts its power to pull downward the lever 42, an d in so doing theeflectwilll be that the roller 41, pressing against the surface of the inclined plane 40, will cause the spindle38, and its attached holder for the barring-tool and the threading-dies, to moveforward, i In opposiing the gage to recover its proper position so the action of a pair of springs. 31, Figs. 1 and bell-crank lever 33, having a yoke-shaped short arm, 34, furnished with friction-rollers bearing against a sliding ring, 35, which latjaws is to point the end of the blank. This- Inasmuch as the, next followingoperation the shank of the blank by meansofadiej-cut ter, and as both the operations mentioned must be performed bydifl'erenttools, each of which must occupy, while doing its appropriate work, the same position with respect to anism can be employedincomm0n by the cutter which points theblanks andthe dieswhich into :place and position to perform theirlsepaof my invention. Thefburring-tool36 and the threading-dies 37 are shown at Fig. 8. They are mounted in the same. holder E, and are the holder, is the radius. 'lhespindle for the a holder is shown at 38, Figs. 1 and 2,and also that a vertical lever, 39, hinged at itsfoot to tion'to the action of the spring 43 is a revolving cam, 44, which renders the spring neutral for the purpose above mentioned, except at those times when the V-shaped tooth 45 on .the lever 42 can descend into the sections of such cam as cut away. One of these depress- .ions below the neutralline is to enable the spring 43 to move forward the burring-tool to engage with the end of the revolving blank, and hold it by yielding pressure against it until such end is pointed, and the other is to enable the threading-dies to move forward to, engage with the blank to cut the thread, and
The hinged arm F supports the spindle 38 of the holderfor the burring-tool 36 and threading-dies 37. It is hinged at 46 to a standard set upon the frame. Projecting downward from the said arm is a lever-arm, 47,, Fig. 2. This lever-arm is capable of being worked in one direction by the movement of an inclined plane, 48, Fig. 1, which is attached to a slidin g bar, and in the other direction by a spring. This sliding bar is operated by a cam, 50, Figs. 1 and 2, on the cam-shaft B.
.W hen the barring-tool is about to commence .its work, and while it is pointing the end of the blank, the said inclined plane 48 is not influencing the position of the hinged arm F, and the axis of the burring-tool is coincident with the axis of the blank. So soon, however, as the end of the blank has been pointed, a spring, located at the foot of the vertical lever 51, Figs. 3 and 4, causes, by means of a link,
Fig. 10, connected thereto, the lever 39 to move backward, the hinged lever 42, Fig. 10, being elevated so as to counteract the pull of the spring 43, and thereby withdraw the burringtool from the blank. The inclined plane 48, Fig. 1, is now set in motion by the cam 50,
whereby the hinged supporting-arm F is vibrated far enoughto bring the threading-dies into coincidence with the axis of the blank. Meanwhile the V-shaped tooth 45 on the lever 42, Fig. 10, has passed the apex of the camface on the revolving disk 44, which hascounteracted the pull of the spring 43, and the' latter now exerts its force to carry forward the spindle 38 and the threading-dies into contact with the end of the blank. The operation of threading now commences, and continues so long as the jaws are permitted to revolve for that purpose.
The length of time that the burring-tool shall continue inaction isdetermined by the,
length of time that the mechanism shown at Fig. 10 permits the spring 43 to act to press the tool against the end of the blank; but the length of time that the screw-threading dies shall continue in action is governed by a cam, 52, Fig. 1, which, through suitable lever-connections, (shown at Fig. 3,) causes the lever 53 to operate an internal shaft, G, to clutch the pulley 54 into its shaft, and give motion to the jaws as well as to the main cam-shaft B, which'latter is driven by the worm-gear 55 on said'shaft. So soonias the cam last mentioned (52) ceases to exert force, the counteracting spring 56 unlocks the clutch-connection of pulley 54, and immediately locks pulley 57 with its shaft, and which latter pulley, running in the opposite direction, and being connected with the revolving jaws by the gearing shown at 58, Fig. 1, causes the jaws to revolve in the opposite direct-ion, to enable the dies to back off from the screw which they have just cut. The clutch-gearin g last above mentioned possesses special pointsof novelty, which I propose to describe in another application for Letters Patent.
As my machine comprehends the operation of dressing the head of the bolt cotemporaneously with the operation of pointing the end or threading the shank, or both, and before the backing 011' of the dies has commenced, I will'next describe how this is effected.
Referring to Figs. 1, 2, and 4 it will be seen that, as both the head of the blank and the shank are to be operated on at the same time, in order to both dress the head and cut the thread, it is' necessary that the holding-jaws should be unlike those commonly used to hold blanks in screw-making machinery, in this, that the blank must be able to'project at both the head and the shank beyond the jaws consequently the griping-jaws must be constructedso as to have a clear opening through them for the introduction of the shank of the blank.
In Fig. 2, the shell or case, which incloses the pointingtool and threading-dies, is partially cut away, showing the relation of the threading-dies, the holding-jaws, and the tool for dressing the head to each other. 59 represents a vibrating tool-holder, whichis set upon a rocking shaft, 60. The holder is supplied with a cutter, 61, of suitable form to dress the under and outer surfaces of the heads of the blanks. This holder is made to bring the cutting-tool up to the head, at the proper time, by means'of an inclined plane, 62, on the sliding bar 63, which latter is actuated by the cam 64, Fig. 2. The tool is fed against the head of the blank by theinclined plane, for such length of time as is required to dress off the head, and then is permitted to retreat to its first position by the shape of the actuatingcam 64, and the influence of springs suitably applied to the tool-holder and to the sliding bar.
In case it should happen, from any cause, that when the. said tool-holder for dressing the head is moving toward the head of the blank, the vibrating table 3, and its appendages, have failed to previously move out of the way, a stop-motion is arranged to stop the whole machine. Abelt-shipper rod is held by means of a latch and against the pressure of a spring, so that itsshippcr-pins will be in the right position to permit the driving-belt to revolve the fast pulley. From the under side of the vibrating table is hinged a lever,
the lower end of which is linked to a sliding 1 rod, which latter will, if the said lever be moved backward, trip the catch which holds theshipping apparatus,and allow a spring to act to slide the shipper-rod, so as to run the belt off from the fast and upon the loose pulley. Unless suchlever be so moved the catch 1 connection which holds the shipper will not be disturbed, except at the will of the operator.
1 Upon the side of the lever above mentioned 1 is pivoted an arm, 65, Fig. 1, the free end of which rides upon the point of "a tappet, Fig. 2, which vibrates as the shaft .60 rocks. Uponithe under side of this arm is a shoulder,
against which the face of the tappet in the shaft will not come into contact, ifthe table has performed its proper motions; but, otherwise, the tappet will strike against such projection, and thereby, movingbackward the lever, causethe latch which holds the belt-shifter rod to be tripped, and the machine to stop.
During the operations of pointing the ends of the blanks above described the chips which are made are discharged through a duct,
.66, coming out at the side of the die-holder, Fig. 9, and the chips produced in the operation of cutting the thread through the openings 67, Fig.8. 1
controls the action of the jaws has revolved' to a point which allows them to'open. Thereupon a wiper, 68, Fig. 1. on the shaft B, comes into engagement with a roller, 69, Figs. 1 and 10, set on a stud-pin in the side of the lever 51, which is linked to the lever 39, and causes the spindle 38, and its holder for the cuttingtools, to move toward the headof the machine. This movementpartly discharges the bolt from the jaws,but its complete expulsion is effec ed by the long rod 70, which lies in the axis of the spindle 38, Fig. 1, andis actuated at the proper moment by the cam 71, Fig. 2, acting through the system of ,leversand connections shownat 72, 73, 74, 75, and 76. Meanwhile another blank has been taken from the row. of blanks, and all the operations above described are to be repeated.
I do not limit myself tothe construction of the several parts of the machine as described, but mean to include all mere formal variations of structure and arrangement not aifecting the principles of operation involved in my machine, as described. 1
What I claim as myinvent'ion, and desire to secure by Letters Patent, is; n
i 1. The combination of the following instru mentalities or organismszrevolving jaws or y.
clamps constructed toreceive and hold 1 a bolt-I I blank so that both the head and the shank of the blank will project beyond the jaws, suita ble threading-dies for cutting the thread on the shank, and a shaving tool for dressingofl' the head of the blankjiwhile the operation 0f threading theshank is being performed, su bstantially as described. i Q n 2. Revolving jawsor clamps suitable for holding a boltblank, in combinationwitha pointing-tool and threading-dies mounted in the same holder, and arranged to be brought successively into coincidencewith the axis of y the blank, so as to firstpoint and then thread the blank, substantiallyas described.
3. The combination of the following mentalities or organisms: revolving jaws or clamps, constructed to receive andhold a boltblank, as described, a tool for pointing the end of the, blank, dies for threadingtheshank, and a shaving-toolfor dressing off the head concurrently withthe operations of pointing or threading, or both, substantially as de scribed.
4.. The combinationof a guide adapted to i hold and conduct a row ofblanks, a vibrating table, 3; and holder 4, as described, and a spring-check operating to cut oil the :undermost blank from thecolumn of blanksin the guide bythe movement of the vibrating table I as the holder is about toreceive a blank, the 1 column of blanks atothertimes'beingsustained by the table, substantially as'specified.
5. The combination ofa blank-holder, 4., a
follower-rod for pushing the blank into the holding-jaws, anda spring-scroll guide for turningthe blank on its axis'as it is entering the jaws, substantially as described. I
6. In combination with the revolvingholder in which the griping-jaws of a bolt-threading machine are mounted a ring, 21, or its equivalent, carrying a spring-pawl, and suitable mechanism for causing such pawl to engage with the holder and partially rotate the same to always bring the jaws to a given position. 7. The combination of revolvinggripingjaws, adjustable to position, as. described,
with the mechanism, substantially as de-i scribed, for causing the bolt-blank to be rotated axially, as set forth. t
8. In combinationwith revolving griping jaws a vibratory g age,;27, to determine the distance measured'from the under sideof the head of the bolt-blank to which the latter shall project from the face of the jaws, substantially as specified.
9. The combination of a follower-rod for i pushing the bolt-blank into the griping-jaws, with revolving"gripin g-jaws for holding such blank, and a gage, 27, constructed to yield laterally to the thrust of the follower-rod, and
recover itself as the follower retreats, substan;
tially as described.
instru- 10. The combination of a burring-tool, 36, for pointing the end of the blank, and threading-dies 37, for cutting the thread on the shank, when the same are mounted in a common holder, and arranged to be brought successively into coincidence with the axis of the blank, substantially as described.
11. The combination of the following-named organisms: machinery, substantially as described, tor giving a forward movement to, with yielding pressure upon, the spindle, which carries the holder containing the burring-tool and the threading-dies; machinery, substantially as described, for causing the said threading-dies to be brought into the plane previously occupied by the barring-tool, and machinery, substantially as described, for causing the common holder for the burring-tool and threading-dies to retreat from the blank after the blank \has been pointed and before the change in the relation of such tools to the blank to bring the threading-dies into action has been made, substantially as specified.
12. The combination of the spindle 38, a
common holder, E, for the burring-tool 36,
and threading-dies 37, with the vibrating hinged journal-support for the same, substantially as described. r
13. The combination of the longitudinallylnoving spindle 38, the wiper-arm 68, and the expelling-rod 70, whereby the said spindle and its holder for the cutting-tools are made to perform the office of preventing the expelling-rod from buckling when acting to expel the finished bolt from the holding-jaws, substantially as described.
14. The combination of a suitably-arranged spring-operated belt-shipper bar, the vibrating table 3, and blank-holder 4, and the vibrating holder 59 for the head-dressing tool, substantially as described, for tripping the holding-latch of the belt-shipper bar for stopping the machine.
FRANK S. ARNOLD, J. G. B. Woons.
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