US1535596A

US1535596A - Guard and guide for circular rabbeting saws

Info

Publication number: US1535596A
Application number: US652445A
Authority: US
Inventors: French Silas
Original assignee: Individual
Current assignee: Individual
Priority date: 1923-07-18
Filing date: 1923-07-18
Publication date: 1925-04-28
Anticipated expiration: 1942-04-28

Description

1,535,596 2 Sheets-Shet RNEY.

f INVENToR. v

5i/as Trench BY /Qf April Z8, 1925.

I y s; FRENCH GUARD MD GUIDE- FOR CIRCULAR RABBETING sAws' Filed Ju1y 1s, 1925 April 2s, 1925. 1,535,596

, s. FRENCH GURHIS ANID GUIDE FOR CIRCULAR'RABBETING SAWS Filed .my 1a. 1923 2 sheets-sheet 2 E I-E- E. .la lf#- d Q u 2.2.. l

A 3 l J a 5., S az l l SHaFenVEA/Tox.

BY z/ y@ ATTO NEX guide and `l?atrentasei Apr. 28, 1925 sinus rennen, or recenseren, new Yoan.

GUARD AND GUIDE FR, CIRCULAR RABBETING SAWS.

it Application filed July 18, 1923, Serial No. 652,445.

To all whom t may concern.'

Be it known that l, SrLAs FRENCH, a citizen of the United States, residing at Rocheestcr, in the county of Monroe and State oil? NewiYork, have invented certain new and useful `llmproveinents in Guards and `Guides for Circular Rabbeting Saws, of which the i following is a specilication.

The object of this invention is to provide anew and `improved form of combination guard for circularI saws used for rabbeting t i `This and otherobjects of this invention will be fully illustrated in the drawings, described in the specilication and pointed out inthe claims at the end thereof.

In the accompanying drawings:

Figure l is a top plan view of a saw tableI equipped with my improved combination guide and guard.

Figure 2 is a vertical sectional view of the combination guard and guide, the section being taken on the line 2X-2X of Figure 1. i Figure 3 is a partial section and elevation of the combination guide and guard, the section being ltaken on the line 3 3* of Figure 1.

Figuret is a detail View of the adjustable tension member of the combination guide and guard. y

ln the several figures of the drawing like i "reference numerals indicate like parts.

rllhe combination guard and guide forming the subject matter of my present invention is intended for use with circular saws when rabb'eting is done therewith. This rabbeting operation consists of cutting channels or grooves into the longitudinal edges` of boards and 1s done by guiding the edges ofthe boards over the circular rabbeting saw and allowing theteeth thereof to cut into theedge oit the board according to the depth required for the i groove or channel to` be itiorined therein. My invention. is adapted to hold the board `to be rab'beted, uniformly,

`:ugailnit the gage of the saw table while the rabbcting operation takes place and then. swing` a guard member over the exposed cutting edge of the saw after the cutting operation has been completed and the board has been removed.

As illustrated in the drawings the gi/lard and guide is mounted ontop of the saw table 1 at one side of the circular saw@ and parallel thereto. It consists of the supporting rail 3 which can be adjustably/clamped in place in the guide channel on groove 4; et 'the saw table. For this` purm pose the under side of the guide rail 3 1s provided with the tongue extendingfthe full length thereot| and this tongue isy adapted to slide in the groove 4 so that the supporting rail can be located at the desired position on the saw table with relation to the circular saw and be securely clamped in place -in this position by threading the set screw 6 carried by the supporting rail into a threaded opening in the groove 4l as illustratedl in section in Figure 2. o

Near each end ol the supporting rail 3 are provided the lugs 7 and 8. These lugs are slotted on one side and have one end et each oi the arms 9 and 10 pivoted therein. The other end of these arms are pivotcd in similar lugs 11 and 12provided on one side ofthe pressure bar 13. This bai-.which is thus connected with the supportingrail 3 by means of the arms 9 and 1() is thus held parallel to the supporting rail when swing-- ing toward or'away from the supporting rail or the circular saw along side of which it is normally held in place. This barfis made of cast metal. i

Suitably fastened to the outside of the pressure bar 153 is the guard shoe 14. This shoe is made of wood or other material thatthe purpose of forming an overhanging ledge i 15 on the side of the guard shoe that will project. over the cutting edge or' the saw and protect the operatoro' the saw against accidental contact with it after or before a board is being fed through the saw for rah! beting.

For the purposeoit yieldingly hold ing the pressure bar and its guard shoe against the side of the board that is being fed through the saw a tension spring 1G is provided. One end of this tension spring istastened to the `adjustable lug 17 which is'fastened tothe inside ot the supporting rail 3 by means et the set screw 18. The lug 17 is elongated and has a slot 18^`provided` in the middle there of. The set screw 18 passes through this slot and is threaded into the side et the supporting rail 3 to clamp the lug in place there- Lil on. lAtl the opposite end thelspring 19 is attaehed to theadjustable member 19 earyis `adapted to engage with these notches.

The pin 21 passes through the bloelctoiiiiing the `member 19 aiidinto `the slot foi-ined in .theiniddle thereof so that the Itension of the spring-1G pulls the portion of the pin the adjustab'leaneinber 19 in a predetermined yposit-ion on thearin 9. This .positionfean be changedl by pulling the-- adjustable member *19outivardlyso that the pin 21 is disenlgaged fromY the notelizinnivhieh it lwas held and then sliding the member 19 alongrthe Y arm 9 until the desired position for the meinberis reached. @n the release et theinember 19 the pin 4Will theni beipulled in to'engagey ment v-With Aanother noteh 2O AWhieh will anehor the-finember-f19 in place in this new position. 'Thi-ouglr this `aiiljustinent Aof the member 19 :the tension vot the spring 16 can -bewinereased or decreased, in that' 4the distance. between the point oi atlaehineiit et the springen lilielugfl and adjustable memberv 19 is increased oi.1deei'e:ised and the against -tl'ie gage Q2 and keep it in line there.-

with.

As illustrated iii-dotted lines the pressure when 4the board is liedagaiiist thesanvand \\'illiiiaiiitaiir an eren iufessure against the boa-rd las` long/as it: is in eontaet-i therewith. ddvhenuthe Iboard has passed theI saw. andthe guard the pressure'bar and its guardsshoe .drill 'swingI bask yto its normalposition in .which the ledge formed. on theI vguardshoe uiilleover Ithe.Cutting edgev o'li the sau'.

The normal. yposi-tion not the guard `shoe,

with relation to the saw ot course inust vary with `the thickness ot theubmird .to..be rab- -beted and Ithe particular .rabbeting roperation stonbeiperitoriued on the board. :For this puit-pose a .stop in thefform of an adjustable .boltliQS is provided onooneside of the-supporting rail. This bolt is ythreaded .in arsuity abledug 24 carriedv by4 :the supporting. rail landgby turning-utlie:.boltyby means; of; its

knob Q5, the `innerend `thereotean be forced .againstxthergedge ot' the arm 10 and thus form a. stop nfor `;it thataiill. prevent zthe swingingeitzthe"arm beyond a predetermined: positionv in .which theA pressure bar and gi'iard armv is held pil'operljfY with relationV to the eireular saw.

I claim- 1. ln a guard and guide ttor eireailar rab- .beting sawsihaving a sau' table, the conibination of a supportingl rail, means 'toi' adjustably anchoring said supporting rail in the saw table, a pair of parallel arins piroted to one side of said supporting` rail, a prrs- :sure bar .piroted to the endet said parati-ffl arms, a` nonnietallie guard member ear'ied onthe outsideo'tl said pressure bar and heel :parallel tothe plane ot rotation ot lne eirexposed Within the slot in the ymember 19 v into one off the notehes Q0 vand thus anchors oular saw, a. ledge formed `on-said guard member, said ledge overhangiiig one ofthe exposed sides and the top of the eireular sawwhen. in :its normal .inoperatiif'e position.

2. ln aI guard andy guide tor eireular rabbeting saws having a saw table, the combination of a supporting rail, means tor adjustablj7 anehoring said-supporting rail in the saw table,` av .pair of Yparallel arms pivoted to yoneside ot said supporting rail, iii-pressure bar pivoted to .theend of said parallel arms, a noninetalhe guardineniber carried ion the outsideot said pressure bar, a ledge formed oni said guard member, saidnledge overhanging` the eireular saw When in its normal inoperative position, an adjustable vlual carried by said supportingrail, an adjustable `ineinber carried by one ,ot' said. parallel arms. a 4tension spring stretched.between said adjustable lugy and said adjustable,inieinber on said arui to normally swing said parallel ariu a\\'a \Y Alroni said supporting rail.

il. Yln a `guard and `iruide tor eirrular rali-- 1 beting sans haring a saw table.'therouibina lion ot a supportingl iail/ineans l'or adjustablyV anchoring said-supporting rail iu the saw table`r a pair .ot parallel. ariiis pii'oted to, one side oit said supporting rail, a pressure barpirotednto the end o'tsaid parallel arins,:a .nonnietallie guard member carried on the outside. ot said; pressure baigaulwlge formed oii-said guardsmember, said ledge. orerl'ianging ther-circular saw .when in its normal'l inoperative position,` an. adjustable lug .carried by. saidsiipporting rail, an `ad- .justable member. carried by one lot said yparallel arins,aftensioii spring stretched between said adjustable` lug and said adjustH able.member on said arni to noi-mall)vv sixiultf said parallelarn'i away 'fi-'oui said siipportiii;.:j rail,a stop lor said parallel ariiis carried by 4said supportingfrail, said stop beine,l adjustn able parallel to said supporting` rail and being adapted to be 'toreed againsteone ol? said -paralllel arms to hold said arms and :u'ith it said pressure bar and guard .member in a predetermined position with relation to the side of, the eiii'eulary san'.

.11. n a'guardiandiguide for eireularral ,beting lsaws `har-ing a saw table, the. eeni- `bination ol` a supporting rail, `means 'or adjustably anchoring said supporting rail in the saw table, a pair of parallel arms pivoted to one side of said supporting rail, a pressure bar pivoted to the end of said parallel arms,` a nonmetallio guard member carried on the outside of said pressure bar, a ledge formed on said guard member, said ledge overhanging the circular saw When in its normal inoperative position7 an adjustable lug' carried by said supporting rail, an adjustable member carried by one of said parallel arms, a tension spring stretched betweensaid adjustable lug and said adjustable member' on said arm to normally swing said parallel arm away from said support ing' rail, said adjustable member carried by one of said parallel arms comprising a block surrounding said parallel arm, a pin carried bysaid block, said parallel arm carrying said adjustable member having notches along' the edge thereof, said tension spring `forcing said pin into the notches of said parallel arm to anchor said block in a predetermined position on said parallel arm.

In testimony whereof I atix my signature.

SILAS FRENCH.