US1001638A - Dental plugger. - Google Patents

Description

W. F. GUBITZ. DENTAL PLUGGBB.. APPLIGATION FILED 111111.12, 1910.

1,001,638. Patented Aug. 29, 1911.

ii'omey.

cULUMuIA PLANuma/u'u co.. WASHINGTON. l1. c.

WILLIAM F. GUBITZ. OF HARTFORD, CONNECTICUT.

DENTAL PLUGGER.

Specification of Letters Patent.

L atented Aug. 2t), 1S). 1.

Application tiled February 12, 1910. Serial No. 543.1125.

.To all', wlw/m t may concern:

strike the blow. 'lhis nut has opposit'el'v dis Be it known that l, ll'ualmu lt`. (iunrrz, :1 j posed projections Il() which pass through citizen oit the United States, and :1 resident ot' l'lartlord, in the count)v of iliart'lord and State ot' Connecticut, have invented certain new and usetful Improvements in Dental Vlluggf'ers, otl which the 'Followingis a specitication.

My invention is illustratet'l and described in connection with its use on a dental plugger and is an improvement upon the strueture illustrated and described in United ritates YPatent No. 916,258?, issued March 2?), 1905 to ll'illiam (i. Church. 4

l`he invention relates particularly to tools such'as are described in said patent tor strikinfy a number' o't successive blows and the improvement relates partieularlj7 to a mechanism by means ot which the number ot blows to be struck can be varied between 1 maximum and minimum,

Figure l ls a side view ot a tool embodying my invention, with part ot the c: s-

ing` shown in section. VFig. 2 is a central seci Fig. 3 is a sectional inc' lever '13 farrvine a fiawl l-l; snincl :s A rs n pressed in one direction b v a spring` (not shown)l` which normally holds it 1n eni gagemeut with a rack lo secured to the caso L all substantially as described in the lbove-mentioiled patent.

A spindle 2 extends entirely through the rase, its opposite end being provided wlth a socket to receive a tool. Mounted on the spindle is a hammer 't8 which rests on an en largement il?) on the spindle against which the blow delivered. This hammer also has a part 20 which lies against one end ot the lever 1t) and by means ol which the hammer r is raised as the pawl engages the teeth ot 'the t rack. YWithin the upper end ot' the case is .secured a nutl Q5 between which and the` hammer A1S is located a spring 2G which is put under compression as the hammer is raised by the lever A13 and which, when the, hammer is released b v the pawl '114i passingl b v a tooth of the rack, throws the hammer against the projection on the spindle to slots :31 in the upper end olA the case, the outer surl'aces otl these projections being,v screw-threaded to engage an internally threaded sleeve $12. When the sleeve is rotated the nut is held against rotary movement and so moves longrittulinallj' ot` the case to varj' the amount olE compression to which the spring' is subjected and therefore the lorce oll the blow olE the hammer on the spindle.

'the mechanism bj means ol which the number ot blows is varied comprises a hub Il?) secured to the spindle aml having on its upper end a series oll steps Bti, 25T: 23S, Vif), and a cap lt) threaded into the end o'lE the rasing and in which is rotarily mounted a stop -l-l. 'l`hc cap has a peripheral slot AlL through which extends a pin lil connected with said stop and b v m =ans ot which it -an be turned. liv movine' said stop to its extreme leftt hand position the maximum amount ot endwise movement ot the spindle is permitted and tour blows are delivered: moving` the stop to the right so that itV overlics the second step 21T th:` amount ot longitudinal movement of the spindle is decreased slightlyv so that but j three blows are delivered; by moving the stop to the next step to the rlght but two blowsI are delivered; and movement of the stop to its extreme right hand position permits ol' but a single blow. This construetion while extrcmcljY simple permits the operator to var v the number oil: blows delivered bv the hammer to the spindle to suit the var viner conditions oil? the work under which the tool is used so that in some parts ot the oper: tion more rapid work can be accomplished by the use ol llour blows, while. in the finishingl stages a tower number ot blows can be utilized; and also the compression ot the spring can be varied to strike a heavier or lighter blow.

i. am aware that the invention which has been herein illustrated and described in one ol its emlnnliments can be changed in its conz-:truction and adaptation.

l claim IA l. ln a dental plunger the combination with a easing' aml a tool carrying spindle mounted therein` o'lE mechanism whereby said tool is "aused to strike a series o'ti blows` and means comprising' a rotar)T stem mounted in the using and step devices on said spindle cope 'ating therewith whereby llO the number of bloWs may be varied and limited.

2. ln a dental plugger of the character described the combination With a casing, a tool carrying spindle mounted therein, and means including a. hammer, actuating spring and tripping device whereby said tool is caused to strike a series of blows, of a hub on said spindle and having a series of steps, and a rotarily mounted Stop constructed for engagement With said steps.

3. In a dental plugger of the character described the combination With the ease, a longitudinally movable tool carrying spindle, a longitudinally movable hammer also mounted therein, and means including a tripping device for causing said hammer to deliver a series of blovvs on said spindle, of a. hub secured on said spindle and having one or more steps on its upper end, a cap secured to said case, a stop rotarily mounted in said cap and located in operative relation to and adapted for coperation With the steps on said hub.

WILLIAM F. GUBITZ. Witnesses D. l. KREIMENDAHL, H. E. HART.

Copies-of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C.

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