US656999A - Saw-set. - Google Patents

Description

Patented Aug. 28, I900.

T. MGKELVEY.

SAW SET.

(Application filed Apr. 23, 1900.-

(No Model.)

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rrr: STATES PATENT OFFICE.

THOMAS MOKELVEY, OF TRAIL, CANADA.

SAW-SET.

SPECIFICATION forming part of Letters Patent No. 656,999, dated August 28, 1900. Application filed April 23, 1900. Serial No. 14,027. (No model.)

To all whom it may concern.

Be it known that l, THOMAS MoKELvEY, a citizen of the Dominion of Canada, residing at Trail, in the county of West Kootenay, Province of British Columbia, Dominion of Canada, have invented a new and useful Improvement in Saw-Sets, of which the following is a specification.

My invention relates to improvements in saw-sets.

One object of my invention is to provide a device of this character in which the teeth of the saw may be set readily and accurately at the desired angle; in which the set can be accurately positioned to insure accurate setting; in which the set is movable positively longitudinally, the anvil being held rigidly, and in which an anvil having a plurality of operating-faces, each adapted to form the set of teeth of different sizes, is removably secured in position, the position being fixed regardless of which side of the anvil is being used.

A further object is to provide a device of this character which is neat and attractive in appearance, durable in construction, simple and efficient in operation, and which can be made at a small cost.

To these and other ends,the nature of which will appear as the invention is hereinafter described, said invention consists in the improved construction and combination of parts hereinafter'fully described, pointed out particularly in the appended claims, and illustrated in the accompanying drawings, forming a part of this specification, and in which similar numerals of reference indicate corresponding parts in all of the figures.

In the drawings, Figure 1 is a top plan view of my improved saw-set. Fig. 2 is a bottom plan view thereof. Fig. 3 is a side elevation. Fig. 4 is a longitudinal sectional view taken centrally.

Fig. 6 is a Fig. 7 is a detail Fig. 5 is a cross-sectional view formed so as to be accurately positioned on the saw-teeth readily and without liability of being moved away from the desired position. Thedevice should also allow of the application of a steady pressure to the set, which pressure should be applied thereto in such manner as to cause a non-liability of the device being inadvertently moved from its position when such pressure is applied. Both the anvil and set should be readily removable from the casing to enable repairs to be made, while one of its parts should be capable of being adjusted to allow of the setting of saws having diiferent sizes of teeth, and for the sake of economy it is preferable that the anvil have such regulating means. In the accompanying drawings I have disclosed a structure having each and all of these requisites, and in order that the construction may be more readily understood I will now proceed to describe the parts composing it in detail.

1 designates the head, formed substantially as shown. This head is formed of two downwardly-extending portions 2 3, connected at their upper ends by the laterally-extending wings 4 4., the latter being formed and connected to the portions 2 3, substantially in the manner shown in Fig. 5. The portions 2 3 have their adjoining faces beveled,as shown at 5 and 6, respectively, thereby forming an inwardly-converging opening 7 therebetween, into which opening the toothed edge of the saw passes when the device is being placed in operative position. Each of the wings at 4; is provided with an adjustable support 8, formed of softer metal, such as copper, although other material might be usedsuch, for instance, as glass-said supports resting on the apex of the teeth on each side of the tooth being operated upon, even though the teeth have been filed or sharpened, the sup ports not injuring the sharpened'points of the teeth, the latter merely supporting the weight of the device, there being no tendency .of the teeth being required to withstand additional weight due to pressure. As will be seen by referring to the drawings, the opening 7 extends entirely through the device vertically, so that the saw-tooth to be operated upon is visible at all times to the operator;

which is mounted the anvil 10, hereinafter described, said anvil being secured in position by means of the set-screw 11. The portion 3 is formed with a rearwardly-extending casing 12, having a central longitudinally-- extending opening 13, the rear portion of which is enlarged and screw-threaded. The opening 13 is adapted to receive the set 14, which fits within the reduced portion ofsa'id' opening, and the front end of said set is provided with the setting-face 15,-as shown in Figs. 5 and '7. Near the re'a'r-=end=of saidset is removably secured a ate-rall-y-extendingf pin 16, which is adapted whenthe setisihpoa sition to extend radially through slots "-1-7,] formed in the casing '12,a-sshown in Fig. 3,.

said'pin and slots serving to liniit the-movemerit of the set within the casing and also: serving to prevent any 'tenden'cy df rotaryl movement of the set within its"'casing, thus; insuring the proper positioning of th'e -ope'r-l at-ing-face 15 relativeto the' tooth. AB-shown,

the enlarged portion of the opening '13 ex-g tends'forwardly to a point beyond the =lim'i-ti of forward movement ofthejpin, ashouider 18 being formed, betweenwhich and the pin; and encircling the set 14"isa-spring19, which 1' tends to normally hold said set-in'its rea'r o'r A screw-"threaded "rod 5 portion 20, having a rotatin gh'a-ndle of suit-i inoperative position.

able '-form-such, for instance, as th'atsh'own in the drawings-4s mounted within the en-i larged portion of the opening 13, theiforward end of said rod contacting against therearg end of the set, the connection being prefer-i ably as shown, the set being centered in theg forward end of the rod. This constructionena ables the operator to 're'adily'separate the; parts, if necessaryfitbeing required on'ly' tore-- move the rod 20 and removethe' pin 16,'when; the set can be readily removed by allowing By thi-s' construcj tion it will be readily seen that t-lre pressure.

it to drop'from the casing.

'is exerted longitudinally of the set and in alinement therewith and that said pressure} is exerted entirelyagainst' the toothbeingop: erated upon, the use of "the screw-threads' allowingof the application of the pressure' gradnally and positively without the-re uirement. of a great manual pressure-s'ueh, for i-nstance, as is required bythe use of a lever-' in which case there is "a tendencyof' the sa w being injured by a vertical plfessure 'of the hand of theope'rator unconsciously applied,

and in additionsuch construction can be readily and cheaply made, therefbeing no requirement of the use of 'pivotally-m'ourited' parts, 850., which are constantl-ysubj'ecttoa liabilityof being'broken or dis'arranged,and thus'impairing the usefulness of th'etoo-l. A

set-screw 21 is provided for the portion 3, by

with a means of which the degree of angularity of the set is I'gaged, it being readily understood that the depth of the set is regulated by the supports 8 acting in conjunction with the faces of the anvil, as hereinafter described. The anvil 10 is preferably provided with *four operating-faces, although a greater or less number may be used, each of which is formed with a straight portion 22 and a beveled portion 23, the respective and relative widths of the straight and beveled portions didering on each face. In use the proper face isjturned rearwardly and held in position byt he-set-screw 11. If a small toothed saw is to be set, the face having the proper straight portion'is placed in position, against Whichthe operating-face of theset forces the tooth, only'so niuch of the operating-face of the set operatin'g positively as would be coveredbythes'traight portionof 'theface of the anvil. 1 f alarg'er tOOthed saw is to be operated upon, a different face of the anvil is :placed'in position, thus-causing a largerportion of the "operating-face of the set "tobe brought into positive operation; but at all times 'the-setting i's done by'the movement of the straight operatin g-face ofthe set to force thetoot hagainst the straight portion of the anvil. "1 f itis desired'toform a"spring-set, the =screw' 2l is 'ad-justedto regulate the angularity'of'theset, after which the device is placed over "the saw and the :set tightened against thetoothtobeset, the screw-threads lockingthe set against endwise movement. Bythen-sprin ging'the rear end of the device 2 in a propter direction the .entire'device acts as a 'lever-andthe tooth is given a spring-set. It will be understood that if desired theset =14 can "ibe'locked'inposition against the tooth 'by simply-leaving the rod 20 in i'ts'forward position, (an-advantage where the operator is called-awayfromhiswork,) these-t remaining in position and indicating thelast tooth operated upon. "I-nadditiom-the use of the means described allows of a quick and accurate setting, it'b'eing readily seen that but a small 'movementofthe rod 20 need be given to release theset and *allow it to be passed into positiod'fonthe next tooth, one turn-0f the tooth and release it, the amount of rotation required bein g governed solely by the length of the tooth and the an-gularity'of its set. 'This'provision forms what might be termed an ad 3' ustable' stop toli-mit the movement of theset,*such ascannot be given in a settin g-toolhaving an operating-lever which imparts rn'o-vemen' t to the set. Other advantagesare present in" the construction set forth, but-itiS belieVed tobe unnecessary to point them out in detail.

"While l ha've herein shown and described a -tool or device capable ofcarryinginto effecttheobfieets-setforth, yet Ido not desire to limit myself to such details of construction, but claim the right to use any equivalent construction which will perform the functions necessary in so far as such equivalents or modifications may fall Within the spirit and scope of the invention, as set forth in the appended claims.

Having thus described my invention, what I claim as new is- 1. A saw-set comprising a head having laterally extending wings; an anvil located therein; a longitudinally-movable set, held against rotary movement, extending therein and adapted to coact with said anvil; means for holding said set against rotary movement, said means also serving to limit the longitudinal movement of said set; a removable screw for imparting a forward movement to said set, said screw moving adjustably and being held in its adj usted positions; and means for returning said set to an inoperative position.

2. A saw-set comprising a head having laterally extending wings; an anvil located therein; a casing extending rearwardly therefrom and having a longitudinal opening; a longitudinally movable set located Within said casing, the front end of said set coacting with said anvil; a pin removably mounted in said set and extending through slots in the sides of said casing, said pin preventing the rotation of said set and also limiting its longitudinal movement; ascrew mounted in said opening and adapted to impart longitudinal movement to said set in one direction; and a spring for returning said set to an inoperative position.

3. A saw-set comprising the head 1, having wings 4:, and also having the opening 7 sup ports 8 carried by said Wings; the anvil 10; the casing 12, having the opening 13; the set 14 removably located in said opening 13, said set being removable only through the rear end of said opening; the pin 16 carried by said set, said pin holding said set from rotation and also limiting the movement of said set; the spring 19; and the screw 20, substantially as and for the purposes set forth.

In witness whereof I have hereunto set my hand in the presence of two witnesses.

THOMAS MCKELVEY.

Witnesses:

E. H. Lnwrs, CHARLES KEELEY.

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