US1838948A - Sawmill dog - Google Patents

Description

Dec. 29, 1931. R. E. LANGILL ET AL 1,838,948

SAWMILL DOG Filed Sept. 13, 1926 5 SheetsSheet l P INV ENTORJ zai ATTORNEY;

Dec. 29, 1931.

R. E. LANGJLL ET AL 1,333,948

I SAWMILL DOG Filed Sept. 13, 1926 5 Sheets-Shet 2 Q N yr [1 W J u u u A I YM INEORS BY 012a; a V M WL MM/AW A TTORNEYS IRQE. LANGILL ET AL 1,838,948

SAWMILL DOG Dec.29, 193 1.

5 "Sheets-Sheet 3 Filed Sept. 13, 1926 Flll mmoooowo Dec. 29, 1931. I R. E. LANGILL ET AL 1,333,943

SAWMILL DOG Filed Sept. 15, 1925 5 Sheets-Sheet 4 41/1/112 711111; Vflrfi. 1

@Ll m A TTORNEYJ Patented Dec. 2 9, 1931 um'ren stares fN 7 OFFICE i ROSS E. LAN GILL AND WILLIAM B. GRUETER, OF MENC JMINEE, MICHIGAN, AS SJ IGNORS;

TO THE PRESCOTT COMPANY, OF MENOMINEE, MICHIGAN, A CORPORATION OFMIQHI- GAN' SAWMILL DOG- I Application filed September 13, 1926. Serial N 0. 134,986.

This invention relates to improvements in sawmill dogs of the so-called tong type, and more particularly to the mechanism for actu ating the tong arms or log-holding members.

One of the objects of the present invention is to provide a sawmill dog of the character referred to having a knee, a pair of tong or log-holding arms supported for bodily longitudinal movement in a direction transverse to the knee face whereby the respective logengaging ends of the tong arms may be ex tended beyond the face of the knee a relatively great amount togrip a large log, or retracted for the purpose of holding a relatively thin board, and wherein means are provided for connecting the tong arms in such wise that upon such movement of one similar movement will be imparted to the other.

Another object is to provide, in a sawmill dog of the character referred to having. a knee and a pair of tong arms supported for bodily longitudinal movement in a direction transverse to the knee face, improved mechanism for imparting such movement to the tong arms. I 7

Another object is to provide, in a sawmill dog, improved mechanism for imparting taper movement to the knee.

Another object is to provide, in a sawmill dog of the character referred to having a knee and a tong arm supported for movement in a vertical plane into andout of log-holding position, improved means engageable by the latter for limiting upwardmovement thereof and providing a cushion therefor.

Other objects and advantages will hereinafter appear. 7

For the purpose of illustrating the invention, one embodiment thereof is shown in the drawings, in which i Figure 1 is a side elevational view of the improved dog, looking toward the left in Fig. 3, and partly broken away for'the sake of clearness;

Fig. 2 is a side elevational view, looking toward the right in Fig. 3;

Fig. 3 is a front elevational View;

Fig. 4 is a rear elevational view;

Fig. 5 is a view similar to Fig. 5t, partly in section, the section being taken on the line 7 55 in Fig. 1; p I

Fig.6 is an enlarged sectional view of the improved mechanism for imparting in-andout'movement to the tong arms, the section being taken on the line 6-6 in Fig. 4;

Fig. 7 is an enlarged view, partly insection, the section being taken 011 the line 7-7 in F ig, 5; i

Fig. 8 is an enlarged sectional view, taken on theline 88 in Fig. 1;

Fig. 9 is a side elevational view, looking toward the left in Fig. 8;

Fig. 10 is an enlarged sectional View, taken on the line 1010 in Fig. 6;

' F ig. 11 is an enlarged sectional View, taken on the line 1111 in Fig. 1 and I Fig. 12 is a detail view in section taken on line 1212 of Figure 1.

The sawmill dog comprises, in general, the knee 10 and the upper and lower tong or log holding arms 11 and 12 supported for movement in a vertical plane toward and away from each other and for independent in-andout movement ina direction transverse to the knee face 13 whereby the tong arms may be projected outwardly beyond the knee face.

to bring their respective log-engaging ends or teeth 14' and 15 to the dotted line positions shown in Fig. 1 to grip a log 16, or retracted connected by means'of the bolt 26 to shoe and fitted within arecess in the latter to prevent tilting of this" tooth about the bolt, the arrangement being such that upon retraction of tong arm 11 to the full line position thereof shown in Fig. 1 the auxiliary tooth op erates to engage the upper edge of the board 17. The construction and manner of operation of the parts just described has been set forth in greater detail and claimed in 00- 28' keyed at their lower ends onthe rock shaft v QQ-journaled in and extending transversely of the base 30 of the knee, the upper ends of these links being pivotallv mounted on the extended ends of a spindle 31 or bolt extending through this end of the tong arm.

The log-engaging end of the lower tong arm 12 passes loosely through the cylindrical portion 32 of a shoe 33 through which passes the bolt3et, the head 3510f the bolt having a sliding fit in channel 21, as more clearly shown in. Fig- 11. The means for supportingthe rear end, of the lower tong arm will be hereinafter described.

The mechanism for imparting movement of the tong aras toward and away from each other into andout of log hold ingposition, includes the rack 36 connected atits lower end by means of the pin 37to the lower tong, arm 12 at a point intermediate itsends,

the rack extending upwardlyand loosely through a sleeve'38 mounted looselyon a shaft 39 extending transversely of andjournaled at its ends in bearings 10 and, 41 with which the tong arm 11 is provided. A pinion 42 is lined on shaft 39 and arranged in mesh with rack 36 and enclosed in a housing 13. wnieh may be cast integrallywith sleeve 38. From the foregoing it will be seen that upon rotation of shaft 39 in one direction the tong arms will be moved together to grip a log, while reverse rotation of this shaft will cause movement of the tong. arms away from each other to release the log, such movement of the tong arms/being. accompanied by sliding movement of their respective l0g-engaging ends a slight amount in the hanger 18 and portion 32 of shoe 33 for the reason that at this time the tong arms are supported at their rear ends for pivotal movement about, relatively fixed axes, as will hereinafter more clearly appear. The shaft 39 is operated by a reversible electric motor 4 1 fixed to the tong arm 11 at its rear end and having its armature shaft connected through a suitable eoupling,indicated generally by the reference numeral 45, t0 a worm shaft 46 journaled in a suitable bearing li carried by the tong arm 11. and meshing with the wormwheel 48. Theworm wheel 48 is assembled over. a cylindrical part 49 fixed on shaft 39, and is provided on each side thereof with a clutch ring 50 and a flange 51 secured to the gear for rotation. therewith by any suitable means such as bolts 52. The worm, wheel is connected to part 49 ,by suitable friction means gaging ends or teeth 14- and 15 will engage and be'cmbedded in the log a certain amount to properly hold the latter, at which timethe clutch discs 53 will permit complete slippage of viorm wheel 48 with respect to the part fixed on shaft thereby preventmg strain on the motor which would otherwise occur.

The coupling may be provided with tl e drum 55 about which is placed a frictional brake band adjusted to place an initial loar on the motor; This operating means or mechanism for imparting movement of the tong arms 11 and 12 toward and away from each other is more fully shown and described in. copending anplication Serial No. 56,590. filed September 16, 1925.

V A bolt 57 is slidably fitted in a housing 58 which may be formed inte jr lly with member 24 at the upper end thereof, as more clearly shownin Fig. 12, and a spring 59 is arranged on the bolt and compressed between the head 60 thereof and the upper. end of housing 58 to oppose upward movement of the-bolt. A lug 61 is aaanged on bolt 57 between the nuts 2 threadedon the upper end thereof and the upper end of housing 58, the lug extending laterally of the bolt through an opening 63 in member 2% to the other side thereof into the path. of movement of shoe 20. In the event that motor 44- is reversed to cause upward movement of tong arm 11 beyond that required to release the log, shoe 20 will engage lug 61 and cause slight further compression of spring 59 until the clutch discs 53 permit complete slippage of worm wheel 18, the lug 6i and its associated parts therebyproviding a cur,, an for limiting upward movement of the tong arm 11. A suitable bracket o; may be scoured by bolts 65 to the base 30 of the knee andarranged to provide a seat or support for shoe carrying the front or legengaging end of the lower tong arm 12, the arrangement being such that the shoe seats upon the bracket Getwhen arm h 1 been lowered sufiiciently to bring the point of tooth 15 slightly below the upper face of the head block 66.

:The mechanism for imparting taper mentto the knee includes the rotatable 67 journaled in the knee 30 and supported against axial movement with respect thereto. Beferring more particularly to Figs. 8 and 9, the nut 68 is mounted on s 67 and fitted ina housing provide. the depending lug 70 and the tending and oppositelydirected lugs 71, the

nut being fixedwith respect to the housing by bolts 72. Levers 73 and 74 2113 mounted on the extended ends of the pin 75jour nut T 8 arranged to engage the adjacent face of the associated lug 71, as more clearly shown in Fig. 9. Abolt 791s pivotally connected by means of the pin to lever 74 at a point adjacent the upper end thereof, and extends loosely through the lug 71. A relatively stiff spring 81 is arranged on the bolt and compressed between lug 71 and nuts 82 threaded on the free end of the bolt. A similar bolt 82 and spring 83 is associated in like manner with lever 73. The lower ends of levers 73 and 74: are spaced to receive one end of a link 84 and are connected to the latter by the pin 85, the other end of link Set being connected bythe pin'86 to the setting means or mechanism which may cornprise the usual rack 87 slidably mounted on the head block 66-and arranged in mesh with the pinion 88 fixed on the set shaft 89. From the foregoing it will be seen that upon ro tationof shaft 89 in acounter-clockwise direction, as viewed in Fig. 1, the rack and knee will be carried forward. In the event that a log is thrown against the knee with great force, the springs 81 and 83 will yield a slight amount to permit slight tilting of levers 7 3 and 74 about pin as a center, this yielding of the springs, however, being only momentary and providing for a cushion be tween the setting mechanism and the knee to relieve the parts against strain which might otherwise occur if a rigid connection were provided between the nut 68 and the setting rack 87, as in constructions used heretofore. The stiffness of springs 81 and 83 is sufficient to normally hold the adjustingbolts' 77 in close engagement with lugs 71 under all conditions met with in actual practice, the springs yielding only'momentarily toprovide a cushion between the parts as explained. In retracting the knee by reversing the rotation of shaft 89, it will be seenthat the connecting link 84 will be under tension and the levers 73 and 74 held against tilting or pivotal movement in a counter-clockwise direction, as viewed in Fig. 9, byengagement of bolts 77 with lugs 71. By reason of the construction just described, it will be seen, further, that rotation of screw '67 in either direction will impartany desired taper move ment to the knee.

For the purpose of rotating screw 67, av

able reversible electric motor '96 beingcom nected to shaft 92- through a suitable coupling 97 and connected by bolts 98 to bracket.

99 fixed to the knee base by bolts 100. The,

gear may be'provided with the end flanges 101 and 102 fixed thereto and friction discs 103 disposed between these flanges, alternate discs being splined at their outer edges to gear 90, the remaining intermediate discs being splined at their inner edges to the collar 104 fixed on the shaft 67. The discs 103 may be held compressed in frictional engagement with each other by the ring 105 fitted loosely in a recess in the adjacent face of end flange 102 and urged to the right, as viewed in Fig. 6, by any suitable means such as springs 106 held compressed between plugs 107 screwed into the open ends of bosses 108 formed integrally with end flange 102. T his construction permits of complete slippage of gear 90 with respect to its shaft when the taper nut 68 reaches either of its extreme positions along screw 67 to lock the latter against ro tation whereby the motor 96 is relieved from strain which would otherwise occur. An in dicator 109 may be secured to the nut housing 69 and arranged totraverse theupper serrated edge of a plate 110 fixed to the knee base 30 to indicate the extent-of taper movement which has been imparted to the knee.

Members or links 111 and 112 are fixed on the ends of a; rock shaft 113 journaledin and extending transversely of the knee base 30.

A member or link 114 is pivotally connected at one end by the pin 115 to the upper end of member 112 and at other end to the bolt or pin 116' extending loosely through the members 27 and 28. The member or link 117 is pivotallyconnected at one end by the pin 118 to the upper end of member 111 and at its other end to pin 116, member 117 being provided with the depending portion 119 piv o-tally connected by the pm 120 to'tne rear end of the lower tong arm 12. From the foregoing it will be seen that upon rotary or pivotal movement of members 27 and 28 to the left, as'viewed in Fig. 1, the upper tong arm ll will be moved bodily and longitudinally to the left to position its tooth 14: out

'w'ardly beyond the face of the'knee to the dotted line position shown, and that such movement of members 27 and 28 will be accompanled by a similar movement of members 111 and 112 by reason of their connection to members 27 and 28 through links 114 and 117, a.nd, further, that the member 11'?" is supported for floating movement by reason of its arrangement and connection with members 27 and 111 and will be moved bodily'to the left and will be maintained in a fixed angular relation with respect to the vertical so that this forward movement of the upper tong arm will be accompanied by simultaneous and similar movement of the lower tong arm 12. It will'bel seen, fur

ther, that inthe means or mechanisi-n just described-for connecting; the lower tong, arm to the member i for operation; thereby,- for all positions or members- Q'Z, 11 1 and 11?,

fi'lines connecting their respective points of 1); total movement, namely,;29, 11$, 118;;ai d 116, w ll. form a parallelogram.

Themeans formpart ng rotary or pivotal.

movement to. members 2. and 28fo-r the purpose QXPlRlRCdKVlll now-be desc ibed, referring more particularly to Figs. 6 and 1.0. The screw-121 is journaled at one end in the bearing lg iwithwhich the knee is provided, collars 123 being; fixedonthis .endof the 16. screw on either side eat the hearing, as shown,

tohold the screw a ainst axial movement while permitt ng of .itree rotary movement thereof, the other end of the screw being .ournaled in the bearin 124: formed inte- 20.grally w-ith the coyer plate 125seeured'to housing- 95 bytl1e1bolts126. The nutlQY'is mountedonscrew 121 and lsgliltted within the houeing 128 providedwith the depending lug 129. and the flange 130, the nut be ng secured to housing1-28 and held against rota- 30. compressedbetween nuts 134; threaded on; the

outer. ends of thelatter and the flange-130. Ar u de r,o d.135 extends loosely through. lug 1 29 and 1s supported at oneend nhousing 95 and'at its other end; in the r ame plate 136 extending upwardly from and being secured to theltnee base, springs 13'? and 138 being arranged on rod 135 at each end thereof for the purpose hereina'ter exp a in-ed. Upon notation of screw 121 in a given direction 40. nut 12Twillbecaus-ed to travel along the screw to the to impart pivotal movement to members 2? and; 28 to. the right by reason of the engagement oil-flange 130 with pin-116, while reverse rotation of scre\v.lf?l .will cause movement. of the nut alon the latter to the left and pivotal movement of nembers 2'7 and 28 to; the left by reason of the connection between thesemeinbers and-the nut-through olts 132, and SDIIIUYS 133 then arm 's erob 0 I 7 b viding acushion to absorbany shock which mi "l t occur. l' v hen nut 127 reac-hes either of its extreme positlons along screw-121 his, I .c 1" L; 0-" 52B 129 engages one or thespimgslor and luO to compress the same, the compressed spring 55 then acting to reduce binding action between the. screwand nut and tofacilitate starting of the nut along the latter upon reverse rotation of the same. For the purpose of rotating screwll2l agear 1 3.9iis,1nounted,on

the screw shaft andarrangedin mesh with a similar earl lO fixed on the shaftlell journaled in housing and, connected through the coupling 1 12 to. the reversible electric motor 14:3. The motor143- is fixed bybolts 1-14 65. to .agbracketlaasecured to the; knee base by bolts-146. The construction andm anner of operation oi -gear 1-39.is identical to that. oi gear 90, friction discs l lflsimilar; to discs103, permitting complete slippage of gear139-to relieve motor 143 from unnecessary strain when the nut 127 reaches either otitsextreme positions along screw .121 toloclnthe same against rotation.

From the foregoing it will be; seen that an improved sawmill dog has been provided wherein the log-holding arms 11 and 12 may be retracted to the full; line positions thereof shown in Fig liin holding-a thin board 17, at which time, the auxiliary tooth 25. operates to engage theupper edge of the board, and wherein the arms may be readily and quickly projected to place their respective. teeth 1 1 and l5 in the. dotted line positions shown to grip a'large log, and, f urt her, that an improved sawmill dog ha been provided wherein the log-holding arms may be readily and quickly operatedin any dcsiredmanner to meet varying conditions as. regardsthe size, and shape of the lumber.

lVhile-but one embodimentof the inveir tion has been shown and described, of course various changes maybe made such as in the size, shape and arrange nent ofthe parts without departing from the spirit of the invention or the scope of the cl The invention claimed is:

1. in a sawmill dog having aknee and a pair log-holding arms supportedfor bodily movement in a direction; transverse to the knee face, means operable upon such movement of one of said arms to simultaneously impart similar movement to, the other of said arms, said means-including links supported for pivotal. movement about relatively fixed axes, one OfSR-ld links beingpivotally, connected to .said first-mentioned arm, anda member interposed between said links and pirotally connected toithe latter and to said other ai'n i, anduneans ,for imparting said iirsit-named movementto said first-mentioned arm.

2. In a sawmill dog having a kneeand a pair of log-holdingarms.supported for bedily movement inadirection transverseto the knee face, means operable upon such movement of one of said arms to simultaneously impartsimi-lar movement to the other of said arms, said means includinglinks supported tor, pivotal movement about, relatively fixed axes, one of said links being pivotally connected to said first mentioned arm, and member interposed, between said linlzs and piiiotally connected to thelatter and provided with. a depending portion pivotally connected to said other arm, and means for imparting said first-named movement to said first-mentioned arm.

8.1m apparatus of the character described, a sawmilllog carriage, a knee mounted thereon, mechanism for imparting setting movement to said knee, means carried by said knee for imparting taper movement thereto and including a rotatable screw and a nut mounted thereon and provided with a laterally extending lug, and means providing an opera connection between said mechanism said taper means and including a lever connected to said nut for pivotal movement with respect thereto,a bolt extending loosely through said lug a'ndconnectedto one end of said lever, and a spring arranged on said bolt between the head thereof and said lug for opposing pivotal movemento'f said lever in one direction. 7 1 4. In a sawmill dog, a kneeprovided with an upstanding member, a log-holding arm having its log-engaging end disposed on one side of said member and supported and guided thereby for vertical movement, a lug supported by said member on the, otherside thereof and extending transversely of the same into the path of movement'of said arm for engagement thereby, and means yieldingly holding said lug against movement with said arm upon such engagementof the latter with said lug. v

5. In a. sawmill dog, a knee provided withan upstanding member, a log-holding arm having its log-engaging end disposed on one side of said member and supported and guided thereby for vertical movement, a. bolt arranged on the other side of said member and supportedthereby forsimilar movement, a sc ring arrangedon saidbolt and opposing upward movement thereof, and a lug carried by said boltand extending transversely thereof to said first mentioned side of said member into the path of movement of said arm. V

6. In a sawmill dog, a knee, a log holding arm supported thereby for movement in a vertical plane into and out of log-holding position and for independent movement in a direction transverse to the knee face, means for imparting said first-named'movement to said arm, and mechanism for imparting said second-named movement to said arm and comprising a rotatable screw carriedby said knee and supported against axial movement, a nut mounted on said screw and connected to said arm and held against rotary movement, and a high speed rotary motor operatively connected to said screw for rotating the same.

' 7. 111 a saw mill dog, a knee, a log-holding arm supported at its'log-engaging end by said knee for movement in a vertical plane into and out of log-holding position and for independent movement in a direction transverse to the knee face, means for, imparting said first-named movement to said arm, a member connected to said arm and supported for pivotal movement in said direction about an axis fixed with respect to said knee and operable upon such movement to impart said engaging the'la tter and supported against rotary movement, a rotatable screw extending through sa d nut and support by said knee against axial movement, and a motor geared to said screw for rotating the same.

8. In a sawmill dog, a knee, a log-holding 1 arm supported at its log-engaging end by said kneeior movement in a vertical plane into and out of log-holding position and for independent movement in a direction transverse to the knee face, means for imparting said first-named movement to said arm, a member connected to said arm and supported for pivotalmovement in said direction about an axis fixedwith respect to said knee and operable upon such movement to impart said secondnamed movement to saidarm, and mechanism for effecting said pivotal movement of said memberand comprising a rotatable screw supported by said knee against axial movement, a nut arranged on said screw for engagement with said arm, said nut being held against rotary movement and being provided with a lug, a bolt provided at one end with a stop and extending looselythrough said lug and connected at its otherendto said member, a spring arranged on said belt for compression between said stop and said lug upon movement of said nut awayffrom said member, and a rotary motor geared to said screw for rotating the same;

9. A saw mill dog having a knee, upper andlower elongated tongs, means co-acting with the forward portions of the tongs and with the knee for constraining the tongs to up and down movement toward and away, from each other andior movement trans verse to the knee, a swingable supporting and driving member pivoted to the knee and to the upper tong, power means co-acting with said supporting and driving, member for moving the upper tong transverse to the knee,

and means co-acting with the supporting and driving member and providing a parallel link motion between the supportingand driving memberand the lower tong for constrainingfthe lower tong to move transverse to the knee when the upper tong is correspondingly moved; Z t

10. Asaw mill dog having aknee, upper and lowerelongated tongs, means co-acting withthe forward portions of the tongs and with the knee for constraining the tongs to I up and down movement towardand "away from: (each other and for movement trans, verse to the knee, a swingable supporting and driving member pivotedtothe knee and to; the uppertong, power means 'coacting with said supporting and driving member for moving the upper tong transverse to the knee,a link pivotally supported on the ,knee and disposed parallel to the s'wingable supioo porting and ,driving me iber a T-shaped member pivotally connected to, the link, to

the swingable supporting; and driving member. and to the lower tongfor constraining 5 the. lower tong to partake of straight back andiforth movement transverse to the knee when tae upper tong is correspondingly moved.

11. A saw mill dog having knee, upper andllower elongated tongs, means co-acting with the forward portionsof the tongs and with the knee for constrainingthetongs to up and down movement towa'rd and away fronreach'other and for movementtransverse to the knee, a swingable supporting and drivingmcmber pivoted to the knee and to the; upper tong, power means co-acting with said supporting and driving. member for moving the upper tong transversete the knee, and means directly connected withthe supporting and driving member and actuated therewithfor constraining the lower tong to move backand forthtransverse to the knee when the upper tong partakes of a correspendingmovement, I

12. Apower saw milldogof the tongty-pe comprising a knee having afac'e, upper and lower elongated tongs associated with said kn e a d, mo b e. o ard, n w y. from, a h o her nd. ransver et he knee ac and a pz trall'el link motion betweensaid tongs for constraining one of the, tongs to'move back and forth transverse to the knee, face when the other tong is correspondingly 35 moved, saidparallel link motion being at the rear end of the tongs so that the tongs may project 7 without obstruction between; them. wellbeyond the face of the knee 13; Ina saw mill dog, a knee having a guideway, a log holding arm, ,ashoe havin g means slidf lbly receiving said arm, a laterally projecting member connected with, the shoe andoperating in the guideway and means mountedonthe kneeand engageable with the movement ofthe shoe 7 14, A power saw mill dog of thetong type comprisinga knee havinga, face, upper and:

lower elongated tongs, means co -acting with 50, the forward portions of the tongs andwith the knee for constrainingthe tongs to up and down movement toward and awayfrom each other and for movement transverse to the knee face, a supporting and driving menr 55, her pivoted to .the knee and to the upper tong, an electric motor mounted on the knee, a screwdrivenfrom the electric motor, means for holdingthe screw against axial movement while permitting it to rotate, a traveleo. ing nut-en aged with the screw, a connection between the traveling nut and the supportand driving member and means for constraining the lower tongtomo ve transverse to the knee face when the upper tong is cor: 65 respondingly moved.

underside of the shoeto limit the downward Leashes 15. A saw mill dog having aknee, upper and lower elongated tongs, means, co-acting with the forward portions of the tongs and witlntherknee for constraining the tongsto up and down movement toward and away from each other and for movement trans verse to ther knee,a swingable supporting and driving member pivoted to the knee and to the upper tong, power means co-acting with said supporting and driving member for moving the upper tong transverse to the knee, and means connected with the support? ing and driving member at a point spaced from its pivotal connection to the upper tong andactuated therewith for imparting to the lower tong back and forth movement transverse to the knee of different amplitude from that imparted tothe upper tong.

16 A, power sawmilldogof the tong type comprising a knee having a face, upper and lower elongated tongs associated withsaid knee and-movable toward; and away from each other and transverse tothe kneeface, means for moving the tongs toward and away from eac l1 other, and means for, movin the tongs transversely to the knee face and including a parallel link motion, interconnecting said tongs for constraining one of the tongs to move ,back and forth transverse to the knee face when the other tong is correspondingly moved.

In Witness whereof, we hereto affix our sigat re ROSS ANGILL, LLIAM B, GRUETER,

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