US111953A - Improvement in saw-tooth swages - Google Patents

Improvement in saw-tooth swages Download PDF


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US111953A US111953DA US111953A US 111953 A US111953 A US 111953A US 111953D A US111953D A US 111953DA US 111953 A US111953 A US 111953A
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    • B23D63/00Dressing the tools of sawing machines or sawing devices for use in cutting any kind of material, e.g. in the manufacture of sawing tools
    • B23D63/06Upsetting the cutting edges of saw teeth, e.g. swaging


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' Letters Patent No. 111,953, dated February 21. 1871.
'The Schedule referred to in these Letters Patent 'and making part of the same.A
To all whom it may concern Beit known that I, JOHN LOUGH, of the village of Buckingham, in the county of Ottawa, in the Province of Quebec, in the Dominion of Canada, inillwright, have invented new and useful Improvements on 'Self-acting Saw-Tooth Press; and-I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawing, where- Figure I represents a side elevation of the press.
Figure II, a plan. Y
Figure III, a side elevation of the press arranged for circular saws.
Figure IV, a detail of the press.
Figure V, a detail of the press.-
Figure VI, a detail ofthe press.
Figure VII, a detail of the press.
This invention relates to an improved machinefor forming orvdressing the teeth of saws by pressure adapted to be driven by power, and, when arranged for straight saws, it is self-acting or automatic.
It may here be well to remark that I have already obtained Letters Patent for the principleof forming cr dressing the teeth of saws by pressure, together with a hand-machine or apparatus, 85e., for performing the same. 'lhese form no 'part of the present application in so far as the apparatus is concerned.
In the drawings similar letters o'f reference indicate like parts.
Letter a is the bed ot' the machine, being in form very similar to the bed of a lathe, and elevated to any suitable heightabove the ground Aby supports a,
of any, required construction f t2 'are two side pieces extending upward, attached to or made in one with the bed a.
In these, journal-boxes are formed to carry the cross-shaft a, formed with an eccentric, a4, situated between the two side pieces ai a2.
The bed a is formed with a projection, b, suitably provided to attach one end of the die-lever b to it. This lever is of the general form shown in the drawing, its'eud being attached to b, in the form of a double eyc,`with pivot-pin 11".
A slide-block, b3, having a hole bored in it to iit thc eccentric a4, is placed upon the. eccentric. rIhis is of snicient depth to reach down and act upon the upper side of the lever b, provided with a smooth tlat surface.
i On the under side of this lever a spring, b, is situated for keeping the lever up against the block D.
On the under side of the lever, and provided with a suitably-tbr1ned neck, by which it can be turned rund, yis attached the die c, and any of its four sides presented for use.
Thelever may bc supplied with a variety of dies,
. tooth rests while b eing pressed.
Between the two side pieces a2, and attached one on each, are two guides, c1 c, arranged to guide the saw 'sidewise to' the exact position under .the die.
The front .one may be adjusted by a set-screw, while the back one is operated by a suitable har, c3,
vas will be hereinafter more particularly described.
On the back end of the shaft a3 a gear-wheel, c, is attached, actuated by a suitable pinion, for transmitting the power to give motion to the parts of -the machine. i
On the arms of this wheel, and of the required length, a suitable projectiomd, is 'situatefto act ou the end ofthe bar c3, causing it to press the guide c to that side and hold the saw in the proper position laterally, being so timed, as regards the revolution of the wheel, that the action of cl c1 shall commence to hold Ythe saw a little in advance'of, and continue a little after the die c has pressed the tooth of the saw, when it is' released.A j
On the upper sideof the bed a, as shown in the drawing, an adjustable rest, cl, is placed, adjusted, and held in any required position,'as regards distance from the anvil-c, by a screw, dgactuated by a wheel, d", the rest dl having a slot extending a considerable partthrough it ina vertical longitudinal direction.
'lhe end d* of this slot is inclined at a suitableanglc to forni a rest for the backiof the wedge e, it being of `the notched .form .shown in Fig. 1V, and made to conform to another inverted notched wedge, c2, attached, by a piu, e, to the slides c, sliding upon the top of the front part of the rest dl.
To these slides e a saw-back rest, f, is attached by pivot j". On this itY freely partially rotates.
The projection f2, in which this pivot is situated, corresponds to and bears in a suitably-formed concavity in e2, for the purpose of preventing the 'strain caused by the pressure ofthe saw against it injuring the pivot f1.
lo hold the bottom end of the rest f in the proper position a projection, fi, is formed at the bottom of e2, provided with an a'dj usting-screw, g.
0n the upper side of the rest (ll, and in the` 1equired position, two 'projections g1 are formed, carry ing the rock-shaft g.
0n this, between the projections, a double arm, g3,
. made to slide upo'n the bed a.-
is secured by a pin, g, thel pivot h passing through both ends .of the double arm, andi also through a slotted hole, 11.1, made in the top ofthe wedge c.
Ou the yshafted, and on "the front end of it, is se cured the disk t, having on its inner side (shown in detail, Fig. Vl) a cam-formed groove, fil, receiving in it'the pin 'i2 attached to. the upper end of the 'lever i?.
This lever is pivoted to the front-side piece .2 by pivot itl, on which it is thus made to oscillate.
To the pin if?, at its lower extremity, a connecting;
rod, ltof the well-known double-jointed form,'lrnown as'safety,connecting-1ods, which will resist an ordinary pressure; but if a jam of any ofthe parts of the machine takes place it will yield and double up at the joints.
The other end of this connecting-rod is attached to the pin l at the end of the arm l1 secured on the front end ofthe rock-shaft g2, and causing it to partially-rotate. In doing this the arms g3 lift the wedge e,'its back being retained close against the bottom .of the slot d by projecting side pieces, on it, sliding in corresponding grooves inthe side, attl1e end ofthe slot.,
In the wedge@1 another slotted hole, l?, of the'coniiguration and situation shown in Figs'. 1V and VII, is formed, havinga pinflf, passing through it and the slides ci, causing the latter to move back,- as the ,wedge el rises, by arms gl; consequently cia-nd f, being attached to the slide e, move back also.
'Ihe sawis attached to j; and its teeth, automatically and lin succession, placed upon the anvil c* in the following manner:
'lo the bottom end off spring-clasps m are attached, griping the 'saw-sidewise with such force as to a little more. than support its weight.
On the sides off grooves are formed for the side pieces m1 to slide in. These are formed with a head, m2, madeiu two pa1ts,'attached at their top, and having extensions n in front-griping the saw, when the still longer e: tensions nl behind are pressed apart,
This is accomplished by forming' theprojection u3- on el, with an inclined edge, n, acting as a wedge insertedin corresponding matr-ical inclines formed on the lower inner edge of h. Y
That the amount the saw may be lifted may he adjusted, a screw, a5, is provided. Its bottom end maybe made by screwing it down to rest on f aud I.eleva'te'the bead m2, so that, during the rise of el, it
moves through part of its stroke without the head lmz lbeing acted upon.
That the head fm2 may be brought hack, and not retain its position after being elevated by n to the spindle-end u of the screw uf', a projection, o, is attached, coming andern, andas this descends o is' A pressed down with it.
The machine is so arranged that-'the action o1 itsl parts, hcreiubeforedescribed, will be so arrangedl that the teeth of the saw ol will be placed on the anvil in -time to be acted upon by t l1e 'die c.
the desired-position by two suitable hangers phone oneach side 0f the sang-having their upper ends jp? A rest, 113,is secured, at any required position, on the bed a by screw 11,,j also provided with a block, p5, actuated by a screw, p6, in the manner indicated in the drawing, to hold vvthe saw from backing out when the teeth are being treated.
In all other respects the machine is constructed the same as that hereinbefore described for straight saws.
'Having'. described the construction of my inven- First, as applied to straight saws, and as arranged in Figs, I and II, the saw is introduced into the machine and the first tooth to` be. treated placed upon the anvil ci.'
position, so that, when the wedge c1 is down in its place, the'saw ol has its back fairly against the front groove-d edge of f,`it being adjusted by the screw g to 'the' required angle.
The saw is then held and supported bythe springclasps nz'.
' The guides c1 c are'next adjusted.v
The die nowdcscends and vpresses the tooth, after which the wedge c1 is lifted in the manner above described, causing the projectionsl n to clasp andhold the 'saw' with such force'that' it overcomes the friction ofthe spring-clasps fm and draws the saw upward a sufficient amount tojbring the next tooth high enough, so that, when the wedge c descends-again to itspla'ce, the next tooth is placed upon the anvil vand pressed, all theparts' of the machine operating as hercinbefore described, and in this manner all the teeth are successively pressed.
Secondly, in the machine as arranged for circular saws, the operation fis asv follows:
The saw p being suspended -by its center by the adjustable .sliding hangers 'p, the position yof which may be varied bysl-iding them upoufthe bed a, and the height of the saw by the holes, as shown in the hangers iu- Fig. III, or vin any suitable manner, one
of its teeth isplaced upon the anvil c4.
The guides cl el are next adjusted,
'lhe rest p is then secured iu therequired position, with the block p5 situated as shown in the draw.
c descends, pressing the tooth.
Byrevolving the screw '199 the block p5 is moved back a suiicient distance to allow the saw and hangers p1 to slide back a sniicient amount for the saw to be turned round, and the next tooth laid upon the anlike manner the remainder of the teeth are treated.
"Having now described the construction and operation of my invention, to whichlhave given the name of LouGHs Improved Self-acting Saw-Tooth Press, I beg to sta-te that I disclaim all other forms of saw'- tooth presses now iuuse.
vVVhat'I claim as my invention, and wish secured by Lett-ers I Patent, is the new and useful Improvements ou Self-acting Saw-Toothv Press]7 'as follows:
1. Ilhecombinatiouof the griping and lifting de vices 'a al o Inf" u g?, with the holding devices m, as described. 2. The combinationof griping and lifting devices with aholdiug device, and die,and anvil, as described.
aml 1'ockshaft with devices for griping, holding, and lifting the rod, as described.
'MontreaL 1st day of November, A. l). 1870. JOHN LOUGH. Wituesseszj Tro. Rrromn, vROBERT MGKNEIGHTL.
tion,'I will now explain its operation.
The rest (lis then put and secured in its properiug,.to preventfthe saw backing out when the die' vil and pressed in the same manner as the first. In
8. rEhe-combination of an irregularly-formed wedge
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020184234A1 (en) * 2001-06-01 2002-12-05 Lundberg Steven W. Internet-based patent and trademark applicaton management system
US20050098069A1 (en) * 2003-11-12 2005-05-12 Mills Robert J. Book rack and pencil tray combination

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020184234A1 (en) * 2001-06-01 2002-12-05 Lundberg Steven W. Internet-based patent and trademark applicaton management system
US20050098069A1 (en) * 2003-11-12 2005-05-12 Mills Robert J. Book rack and pencil tray combination

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