US1389850A - Engine-cylinder dresser - Google Patents

Description

0. STROBERGER AND R. E. LEE. ENGINE CYHNDER DRESSER.

APPLICATION FILED NOV. 1, I920. 1,3 9, 50, PatentedSept. 6,1921.

2 SHEETS-SHEET 1.

I 01122 ,jil'aayal and 0. STROBERGER AND RLE. LEE. EN GINE CYLINDER DRESSER.

APPLICATION FILED NOV 1, 1920. 1,389,850. PatentedSept. 6, 1921.

2 SHEETS-SHEET 2.

Y/( 'II. WM

. UNITED STATES PATENT OFFICE.

OTTO STROB ERGER AN D REZIE E. LEE, 0F GREIGH'I'ON, NEBRASKA.

ENGINE-CYLINDER DRESSER.

Specification of Letters Patent.

Patented Sept. 6, 1921.

Application filed. November 1, 1920. Serial No. 421,016.

To all whom it may concern:

Be it known that we, Or'ro S'rnoBnRoER and Rnzrn E. LEE, citizens of the United States, and residents of Creighton, in the county of Knox and State of Nebraska, have invented a new and useful Improvement in Engine-Cylinder Dressers, of which the following is a specification.

Our invention relates to engine cylinder dressers or finishers and has as its all important object the provision of a device which may be readily inserted in the engine cylinder and efiectively lap or finish the interior thereof.

Further, the invention provides a rotatable cylinder lapper or finisher which ineludes a pair of complementary semi-cylindrical sections provided with means for holding an abrasive sheet thereon which will be held firmly at all times against the inner walls of the cylinder during the rotation of the device.

The invention also provides a rotatable abrasive holder including a pair of semicylindrical sections resiliently moved away from each other to hold the abrasive material in working position against the inner face of the cylinder.

The invention also provides a device of this character which may be used in con junction with any conventional type of rotating tool holder.

With the preceding and other objects and advantages in mind that will become apparent from the following disclosure, the invention consists in the novel combination of elements, and arrangements of parts and operations to be hereinafter specifically referred to, claimed and illustrated in the accompanying drawings, wherein:

Figure l is a side elevation of the device in operation, parts of the engine being operated on, being shown in cross section.

Fig. 2 is an end elevation of the device.

Fig. 3 is an enlarged side elevation of the device detached from the rotating tool holder.

Fig. 4. is a sectional view taken on line 4-4 of Fig. 2.

Fig. 5 is a perspective of one of the elements embodied in the combination.

Referring in detail to the drawings, where in similar characters of reference designate corresponding parts throughout the several views, the numeral 5 designates a conventional type of lathe or other metal working machine and includes a rotatable tool holder 6.

()ur improved cylinder dresser or lapper, as reduced to practice, consists of a pair of complementary semi-cylindrical abrasive holders or sections 6 upon the inner face of each of which is a boss '7 provided with a recess 8. A pin 9 extends transversely from one section to the other and has its ends engaged in the recesses 8. The ends of this pin 9 stop short of the end walls of the recesses 8 so that the sections 6 may be moved laterally toward each other. The numeral 10 designates a shank having one end secured in the rotating chuck or tool holder 6 and has its opposite end formed with an eye 11, which is disposed on the pin 9. Centrally of its end and held in this position by a set screw 12, encircling the pin 9 and located upon opposite sides of the eye 11 are coil springs 13, the inner end of each of which bears against this eye 11 while its opposite ends bear against the adjacent boss 7 and thereby urges the sections 6 away from each other.

As shown in Figs. 2 and 3, the sections 6 are formed with, upon their outer faces and at their lon itudinal edges, longitudinal recesses l4. isposed upon the outer face of each of the sections 6 is a sheet of emery cloth or other abrasive material 15. One end of each of these sheets is disposed in one of the recesses 14. and is held therein by clamping bars 16, the latter being detach-ably held in the recess 14 by fastenings 17. The opposite ends of each of these sheets 15 is held in the other recess of their respective sections by a resilient clamping bar 18 having its ends formed with clips 19 engaging the notches 20 located at the ends of the section 6.

In order to limit the outward movement of the sections 6, when the same are not en gaged within the cylinder, there is provided a pair of longitudinally curved plates 21 which are secured to the inner face of the sections at their longitudinal edges by fastenings 252. One end of these plates is provided with a longitudinal slot through which pins or screws 24-, carried tion 6, extend.

in operation, the sections 6 are moved. toward each other to permit the same to bs received in the cylinder of the engine. it asmuch as these sections 6 are under he i finance of the springs 9, they are urged away chuck or from each other and resiliently hold the abrasive sheets against the inner face of the cylinder.

It is to be understood that the form of our invention herein shown and described is to be taken as a preferred example of the same, and that various changes in the shape, size and arrangement of parts may be resorted to without departing from the spirit of the invention or the scope of the subjoined claim.

Having thus described our invention, what we claim as new 'and desire to secure and rotect by Letters Patent of the United States, is:

A device of the character described, comprising a pair of complementary semi-cylindrical sections each of which being PI'OXlClQd with a recess in its inner face and located atdiametrically opposite points, said sections being also provided with longitudinal recesses upon their outer faces and at their longitudinal edges, abrasive sheets embrac ing the outer faces of the sections and having their ends disposed in the recesses, clamping bars holding one end of each sheet in position, and resilient clips disposed in the, other recesses and holding the opposite ends of the sheets in place, a pin having its ends engaged in the recesses, a shank adapted to be connected with a rotating tool and provided with an eye at one end through which the pin extends and has positive connectionv therewith, coil springs on the pin bearing against the eye and sections to urge the latter away from each other, plates carried by the inner face of each section, each of which being provided with a slot, and a pin. carried by each section and engaged in the slot.

OTTO STROBERGER. REZIE E. LEE.

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