US873583A

US873583A - Polishing-machine.

Info

Publication number: US873583A
Application number: US34695506A
Authority: US
Inventors: Charlie M Nichols
Original assignee: Individual
Current assignee: Individual
Priority date: 1906-12-08
Filing date: 1906-12-08
Publication date: 1907-12-10
Anticipated expiration: 1924-12-10

Description

G. M. NICHOLS.

POLISHING MACHINE.

APPLICATION FILED D30. 8, 190B.

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No. 873,583 PATENTED DEG. 10,1907.

0. M. NICHOLS.

POLISHING MACHINE. APPLICATION FILED nme, 1906.

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. r N m 3 7 N k lwoefil'oz CHARLIE M. NICHOLS, OF BEAUMONT, TEXAS.

POLISHING-MACHINE Specification of Letters Patent.

Patented Dec. 10, 1907.

Application filed December 8. 1906- Serial No. 346,955.

T 0 all whom it may concern:

Be it known that I, CHARLIE M. NioHoLs, a citizen of the United States, residing .at Beaumont, in the county of Jefferson and State of Texas, have invented new and useful Improvements in Polishing-Machines, of which the following is a specification.

This invention relates to polishing machines, designed especially for treating and polishing the interior of gun barrels or other metal tubing for the purpose of removing pits or rust therefrom, and embodies in its organization a rotary mandrel for operating the polishing tool and a reciprocatory carriage in which the tube is clamped or other wise secured and through the medium of which a longitudinal, reciprocatory movement is imparted to the tube relative to the tool during the polishing operation.

The invention has for its objects to provide a comparatively simple, inexpensive device of this character whereby the interior ofthe tube will be rapidly and thoroughly cleaned and polished, one in which the tool and man drel will be properly driven and the tube reciprocated relative thereto in effecting the polishing action, and one in which the amount of movement imparted to the carriage may be varied at will to accord with the length of the tube being treated.

A further object of the invention is to provide an improved-and simplified form of tool for use in performing the polishing operation,

one whereby tubes having a tapered bore, as in the instance of choke barrels, may be treated without injury, and one which in action will conform readily to the bores and effect the cleaning and polishing without marring the interior of the tube.

With these and other objects in view, the invention comprises the novel features of construction and combination of parts more fully hereinafter described.

In the accompanying drawings: Figure 1 is' a side elevation of a machine embodying the invention. Fig. 2 is a top plan view of the same. Fig. 3 is a cross section taken on the line 33 of Fig. 2. Fig. 4 is a detail cross section taken on the line 44 of Fig. 2. Fig. 5 is a perspective-view of the crank arm included in the carriage reciprocating mechanism. Fig. 6 is a perspective view-,of the polishing tool. Fig. 7 is a section taken centrally and longitudinally through the head of the tool, showing the parts on an enlarged scale. Fig. 8 is a cross sectiong taken on the line 88 of Fig. 7. Fig. 9 is a view of a modified form of polishing tool. Fig. 10 is a detailview in cross section of the device shown in Fig. 9.

Referring to the drawings, it will be seen that the main frame of the machine comprises a horizontal bed or table 1 sustained on supporting legs 2 and embodying a pair of longitudinal side bars or rails 3 above the forward portions of which there is arranged a pair of longitudinal guide members or rods 4 terminally fixed in bearings 5 attached to the rails 3, there being mounted for reciprocation on the table 1 a carriage 6 slidably sustained by bearing boxes 7 formed to receive the guides 4, while fixed on the car riage is a substantially U-shaped bearing frame 8 through which is threaded the operating screw 9 of a movable clamping block or head 10 through the medium of which the gun barrel or other piece of tubing 11 to be acted upon is clamped in place on the car r1a e.

Extended transversely of the forward end of the table and journaled in suitable bearings 12 is a main drive shaft 13 having fixed thereon a cone pulley 14 connected by a belt, not shown, with any suitable source of power, there being also fixed on said shaft a bevel gear 15 in mesh with a bevel pmlon 16 fixed on the rear end of a longitudinally disposed rotary mandrel 17 in turn journaled 1n bearings 18 and fixed against longitudinal movement in its bearing by means of collars 19 which contact with the ends of the bear? ings 18.

Extended transversely. of the table at a point in advance of and suitably remote from the shaft 13 is a second shaft 20 journaled in bearings 21 and geared to and for operation from the shaft 13 by means of a sprocket chain 22 arranged for travel on a sprocket pinion 23 fixed on the shaft 13 and a sprocket gear 24 fixed on the shaft 20, on one end of which there is also fixed a crank arm 25 provided with a series of spaced openings or perforations 26 for a purpose which will presently appear, and havingits forward lower end weighted as at 27, whilefpivoted at one end on an arm 28 fixed to and projecting transversely outward from the carriagefjg dgis a rigid connecting member or pitmanj; 29 having its other or rear end pivoted to the crank arm 25 through the medium of a pintle or bolt 30 entered through one of the openings 26.

Screwed into or otherwise detachably en gaged with the forward end of mandrel 17 is a tool shank 31 of a length to extend through the tube 11 and having at its outer or for ward end a head 32 provided with a longitudinal recess or seat 33 in which is arranged a movable scraping blade 34 having its sharpened active edge 35 curved inwardly at its ends as at 36,-the blade being provided at its longitudinal center with a transverse pivoting member or pin 38 for pivotally and movably securing the blade in the head, while arranged in the recess 33 beneath the blade is a leaf spring 39 of the form shown and having outwardly curved portions 40 which bear on the inner edge of the blade respectively at oppositesides of its longitudinal center, thus yieldably supporting the blade which may move bodily and transversely into the recess 33, for endwise tilting movement.

In practice, and during operation of the shaft 13 which may be driven. from any suitable source of power motion will be imparted to the mandrel 17 through the medium of the gear 15 and pinion 16 to in turn oper ate the polishing tool. During operation of the mandrel the shaft 20 will be driven from the shaft 13 through the medium of the chain gearing, thus operating the crank arm 25 and pitman 29 for reciprocating the carriage 6 to move the tube 11 back and forth longitudinally of the polishing tool. It is to-be observed that during the polishing operation the cutting edge 35 of the blade will be pressed yieldably into contact with the inner wall of the tube for removing rust and pits therefrom and effecting a thorough polishing of the tube, and further that the blade may tilt longitudinally against the action of the spring 39 to properly conform to a choke or tapered bore,

thus preventing injuryto the latter. Also it is to be noted that owing to the sharpened edge 35 of the blade being curved rearwardly at its ends all liability of the ends of the blade scraping or otherwise marring the interior of the tube during rotation of the tool therein is wholly obviated.

In Fig. 9 there is illustrated a modified form of tool to be employed for cleaning and polishing gun barrels and which comprises a pair of opposed, reversely curved spring arms or blades 41, preferably made in one piece, as shown, and attached to a stem or shank 42 having a threaded portion 43 for engagement with a cleaning rod of usual form, there being fixed tothe blades 41, which are adapted for relative compression toward each other, holders 44 designed to receive a filling of any suitable cleaning, polishing material 45, such as cotton waste,

wire fabric or the like.

In practice, the tool, which is attached to a hand operated cleaning rod, will be passed through the gun barrel or other tube to be cleaned and polished, and owing to the form and arrangement of the arms 41 the holders 44 will automatically assume the proper inclination for following the line of the bore to be cleaned.

Having thus described my invention, what I claim is:

1. In a machine of the class described, a frame, a carriage supported for reciprocation longitudinally of the frame, means for clamping a tube upon the carriage, a mandrel supported for rotation upon the frame, a tool holder connected with the mandrel, a tube engaging tool pivotally connected with the holder, and means for simultaneously rotating the mandrel and reciprocating the carriage.

2. In a machine of the class described, a

frame, a shaft mounted for rotation transversely upon the frame, a mandrel supported for rotation longitudinally of the frame, intermeshing bevel gears upon the transverse shaft and the mandrel, a countershaft driven from the transverse shaft, a carriage supported for reciprocation longitudinally of the frame, and having a laterally extending arm, a crank mounted upon the countershaft, a pitman connecting said crank with the arm extending from the carriage, means for clamping a tube upon the carriage, a tool holder connected with the mandrel, and a tube engaging tool pivotally connected with the holder.

3. In a machine of the class described, a frame,a carriage mounted for reciprocation longitudinally of the frame, means for clamping a tube upon the carriage, a mandrel sup- Y ported for rotation upon the frame, a tool holder connected with the mandrel, a spring actuated tube engaging tool pivotally connected with the holder, and means for simultaneously rotating the mandrel and reciprocating the carriage.

4. In a machine of the class described, a frame, a carriage mounted for reciprocation longitudinally of the frame, a driving shaft supported transversely upon the frame, a countershaft supported for rotation transversely of the frame, means for transmitting motion from the driving shaft to the countershaft, a counterweighted crank upon the countershaft, a pitman adjusting said crank with the carriage, a mandrel supported for rotation longitudinally of the frame, means for transmitting motion to the mandrel from the main driving shaft, means for clamping a tube upon the carriage,'a tool holder connected with the mandrel, and a tube engag-