US1841324A - Safety device for rotating tools - Google Patents

Description

12, 1932. 1 A. M. DEGNER SAFETY DEVICE Fon noTA'TI'NG ToroLs Filed- Eeb. 2e, 19,31

' /NvE/ram M A56/VER Patented Jan. 12, Y i. i y *n C ALBIN' M .,nEGrN'nn.,po ig.-ro1.nno,`oiiiofnssrnonlisunrncn corinusrron Conronfni- 'rior-r,l or romeno, onro, A cpnronnrrenponnnw gamew t i Applicationniea February z'eieei; sr'iain; 518.31221` V f 1' This invention relatesto a safety device for and; 6Lv lhey plunger `is normally heldv ,inl ref rotatable collapsible taps and like toolswhich traotedpositionby@l spring-125,' the upper end are reset by a radially extendingflever carv.of...whichen'ga-gesthe'underside oa nut-,.27 ried by the body of the tap. The operator kca-rrie'dbythe upper.endpfthefplunger7 and i@ will frequently attempt to reset the tap while Iahy,uvhichithecutters a "e heldldrawn illtothe i it is rotating especially when the tap is ibodylliaisiiicnt'diStanCe'tQ clear heWOlkmounted in a drill press spindle. This :is'az` The'.handle;fordepressingthe plungenis dangerous proceeding since the operato1"s ishowilfafs afk laterally extending levll 29, pir* sleeve is liable to become entangled in the ot-,cdas at;ln-fijcollarmnd having enen--y "fm lever with serious consequences to the operatending iinger v35;,tl'1e kend-.of which projectso tor as will be readily appreciated. inta Suitable Vhole O11. cavity?? nyihe. lOOdy In accordance with the present invention, e 11. Thercollar 3.3is-in'sliding. relationtoY a the tool is encircled by a ring which is pivsleeve/.or ring)l slidableonthe body lland otally mounted on thebody of the tool, the #Which-.is `})rovded Witheet-i iiangefl against 15 ring being coupled to the extending end of the "which lthe collar 33 bears. `fxThe sleeve 39 'isfy 5 actuating lever, the arrangement being such coupled to the plungrlbymeanso'ff aftransthat when the ring is tiltedthe lever will be -yelsely arranged couplinglbar 43 `asis clearly actuated. Y Y :shown in l5, itbeing notedfthat `the.body n Referring to the accompanying drawings, .11; 1S provi-dedwithal diametricclearance slot 20 forming part of this speciiication, 45 longrenoughfto permit-the,plunger andf-'n Fig. 1 is a perspective'view oi a well known f sleeveto; hvefa con] oint movement sufficient type of collapsing tap and showing the presto expand Y or collapse gthei"cutters when `the i ent invention applied thereto, y `lever.' 29"is actuated. l :'.1 V Fig. 2 is an enlarged vertical crossV section morder Lto-.hold the cutte'rsi'nvexpanded 'i l25 taken on line 2-2 of Fig. 1; ,or setfpositionthereis provideda segmental 75 Fig. 8 is a side elevational view of thel dedetent 4i? locatedfwithinatralnsverse slotprovice shown in Fig. l.; 'e videdin thetwall'fo-f theisleeve 39.V This de`y Fig. l is a view partly in section andpartl'y tentfislnormallyzheld pressed -againstth'e 1inin elevation of the device shownin Fig. 1, the ner.' wallof 4arrfannular Han-ge ,49," depending jv1m30 section being taken on line 4-4 of Fig. 3; ironia ri``g 51;;adjustablyamounted'on thel 'so Fig. 5 is atransverse section taken online body11by asmallsp'ring "53? located ineach f 5-5 of Fig. 2; end 0fth`edetent,the iiangevextendinginto an f Fig. 6 is a transverse section takenVA on line annular spacefo'rmedbetweenthezupper ends 6 6 of Fig. 2, and Y yofthe'rsleever) yIa'nilccllar 33.- 1 Y The bottom` tion illustrating the arrangement of parts i'Giiainfer'andthebottomofthe spaceiinwhi'ch shown in Fig. 2 in locking relationship. 'f sthe .flange proects 1s formed'witlr abevelj,so- In the drawings, 11 designates a tap body f thatffaiiterethe sleeve B9 has been depressed l having an integral tapered shank 13 for in- SUiiClSltly 5a-Set*fthe'iClltPSih@effliwll Y'40 Sertion in thespndle of a, drill press,V lathe move outwardlyuntilthe beveled faces abutfo or the like. The body is provided, at its lower aid-,tleldetent eligages4- the underside ofV the 4 end, with a number of equidistant radial slots aiiaiigf Qxtiicrebylockmg 4,the cuttersinset 15 for the reception of cutters `or chasers 17 p-03116191.15 Q -ielesejtliclock and collapse which are held in place by aca'p 19iastened .the clit-ters;thercollarisfmoved lipvvarilly,`

' 45 to the bottom face of the body. The cutters .eitlierbyjtheflever 291- orsomer other rn'eansf"9f- 50 with the cutters, as is clearly shown in Figs?, s tQOdQJi;

are adapted to be moved inwardly orwoutsothat :the-- beveled *faces cofact` with each wardly from the axis of thebodylll, as the l`other,toarrowtl the l`kjletent inwardly aga-inst case may be, by aplunger 21 having a head .=the-.action2ofaspringuntilthe detentjdisen- 23 in interlocking and sliding enga-gement gagesthe flange 49, as will be readily.under-'M1 to operate the handle.

'i In certain types of l vention is in the nature ly collapse the cutters F rom the foregoing description, it will be seen that when the apparatusis revolving, the laterally extending handle or lever 29 constitutes a source of danger to the operator, as by catching in his sleeve when he attempts To eliminate this source of danger, the present inventionprovides a protecting shield or ring which permits the operation of the lever without danger to the operator.y Y

In accordance with this invention, thereis provided, as shown in Fig. l, a shieldor ring which encircles the apparatus. The ring is pivotally mounted on a pair of laterally extending projections or spokes 57 of which the collar 33 -forms the hub and is suitably attached to the end of l-ever 29 so that when having radially movable cutting elements and means including a lever rotatable with the tool for actuating said elements, of a ring encircling said tool and enclosing the lever and connected to the outer end of said lever, means projecting from said tool for pivotally supporting said ringv for rotation with the tool .and a shield carried by said ring.

In testimony whereof I aliix my signature. v' lALBIN M. DEGNER.

the ring is tiltedthe lever will be operated. By providing thev end of spokes 571'w1th e.

screws 59 andthe end of lever-29 with a screw 6l, all of which extend through clearance holes provided in the ring andare screwed into their respective sockets until l'lush with the outside periphery of the ring, not only is a relatively simple pivotal mounting, which is easy to assemble, provided, but all danger from-protruding screw heads is eliminated.

` In order to prevent the laterally extending spokes and lever from catching the operators ngers when he touches the ring to either set ory collapse'the cutters, there is provided Withein the ring 55 a shield 63. This shie'ldfpreferably comprises. a screen disposed within the ring above thespoles and lever so as to elfectually prevent them from catching the operators lingers without obstructing his view of the work. .As-'will be readily appreciated from the foregoing'description, the inof an attachmentfor Y atype of rotating tool now'on the market and having a radially extending lever 29.

work done by rotatable Y collapsing tools, it is desirable -to automatical-v after they have entered the work a desired distance. To this end y there is provided a trip plate 65'which is sup- Y ported at the end of a pair of adjustable arms 67 suitably attached to the collar 33. VAs soon as the cutters have 'entered the work the re- .quired distance, the work engages the trip -fplate and through Vthe arms 67 causes the coli i i detent 47,

lar to'move upward and thereby unlatchthe p allowing the cutters-to collapse as v -has heretofore been,` described.'

What I claim is 1. The combination with aV rotatabletool yhaving radially movable cutting elements f and meansxincluding a lever rotatable with encircling said tool andenclosing the lever and connected to .and means supported by said tool for pivotally supporting said ring for rotationwith the tool.V

, the tool foractuating said elements, of a ring f o the vouter end of said lever, l, I

Images