US1674465A

US1674465A - Control attachment for engine lathes

Info

Publication number: US1674465A
Application number: US158994A
Authority: US
Inventors: Bernard J Callan
Original assignee: Johnson Bronze Co
Current assignee: Johnson Bronze Co
Priority date: 1927-01-04
Filing date: 1927-01-04
Publication date: 1928-06-19
Anticipated expiration: 1945-06-19

Description

June 19, 1928.

B. J. CALLAN CONTROL ATTACHMENT FOR ENGINE LATHES Filed Jari. 4, 1927 2 Sheets-Sheet mum INVENTOR June 19, 1928; 1,674,465

' B. J. CALLAN CONTROL ATTACHMENT FOR ENGINE LATHES Filed Jan. 4, 1927 2 Sheets-Sheet 2 Patented June 19, 1928.

junirsn STATES BERNARD J. CALLAN, on NEW CASTLE,

PATENT OFFICE.

PENNSYLVANIA, ASSIGNOR TO JOHNSON- BBONZE COMPANY, OF NEW CASTLE, PENNSYLVANIA, A CO RPORATION OF PENN- SYLVANIA.

CONTROL ATTACHMENT FOB ENGINE LATI-IES.

Applicationfiled January 4, 1927. Serial No. 158,994.

This invention relates to engine, or machine lathes, and more particularlyto a carriage'control attachment therefor.

In an engine .lathe, there is provided a carriage reciprocable alongthe bediof the lathe. This carriage may beoperated in either direction, either by hand or through gearing driven by the lathe. The control lever for the automatic drive is, in the ordinary lathe, always positioned on the apron of the carriage at the end of the carriage most remote from the head stock of the lathe. This arrangement is highly satisfactory for most classes of work, but is not convenient for the turning of small objects such as sleeves and bushingswherethe machine is operated at arelatively high speed and where the piece has to be frequently changed. In the standard lathe, the opera-.

tor has to use that hand for controlling the automatic feed which he also uses for placing pieces in the automatic chuck of i the lathe or for removing finished pieces from the chuck. Consequently the location of the control lever is not well suited for this class of work.

' According to the present invention, it is proposed to provide an attachment which will permit of the operation of the control lever from the opposite end of the carriage so that the operator does not need to use the same hand for starting and stopping the carriage which he uses for placing bushings j on the chuck and removlng them from the verse itselfafter a predetermined distance thereon.

of travel, but wherein the movement of the carriage in either directioncan be stopped at any time.

The invention may be readily understood I by reference to the accompanying drawings in which--- Figure 1 represents a side elevation of a portlonof standard engine lathe having a well known type of automatic clutch and 7 having my invention applied thereto.

Figure is a detail view on anenlarged scale showing theadjustable stops for tie.

lterminingthe movement of thetravel of the carriage.

, Figure 3 isa detail view showing the operating connection between the clutch op erating handle and the carriage control mechanismfl I In the drawings, 2 designates the bed of a lathe having the usual head stock 3 and usual driving pulley 4. The spindle 5 of the lathe is provided with a clutch at 6, and an automatic chuck mechanism 7. The clutch and automatic chuck are of a type now generally well known, and form no part of the present invention. The arrangement is such that the automatic chuck and the clutch may be simultaneously operated by the movement of an operating handle 8.

Movablealong the bed 2 of the lathe is a carriage 9 having a depending apron 10 On the carriage is the usual adjustable tool post 11'. The carriage is pro vided with the usual automatic driving means operated from a lead screw .12, and

including a reversing gear designatedv gen erally as 13 dr ving a pinion 14 for engagement with the rack 15 on the bed of the lathe. This general arrangement is quite common in engine lathes.

Carried on the apron of the lathe carriage is a control lever 16 for operating the reversing gear 13. This operating lever is in the position where it is generally located on all machine lathes, this position being at that end of the carriage most. remote from the head stock- 3.

According to the present invention,

lever 19 is a spring projected detent pin 22" for engagement with recesses 23 in the bracket. In the intermediate position, the lever 19 holds the lever 16 in a neut a1 position. A movement 0t tile 161 01. 19 in either direction from the neutral position shilits the-*lever 16 to operate the reversing drive: mechamsm13 to cause the carriage to travel in the desired direction.

VV'ith such an arrangement the travel. of the carr1ageca'nbe controlled by the operator with his left hand, leaving his right.

hand entirelyfree for the applicatioi'r of bushings to the chuck and theremova-l of machined bushings therefrom.

According to thepresent invention, it is further proposed to'provide means whereby the movement of the carriage may, 1n: addition be aut'on'iatically controlled to a certain" extent. To this end a rod 2 1 is mounted in a bracket-'25- on the frame' ot' the lathe. Un

this'rod are spaced apart stop members 26;

These members, which arein the nature of collars, are adjustable on the rod and can be fixed by means 01 setscrews 27. Each collar is preferably provided with a spring projected cushioning pin 28i The pins 28 are turned in opposite directions and are located' in the path of movement oi" the lever 19. When the carriage moves in one direction to a predetermined extent the lever 19 comes'into contact with the cushioning 13in 28 of one of the stopcollars. As the carrlage continues to move whlle the stop collar holds the lever against movementthe lever will be=shitted. A predetermined movement of the carriage in the opposite direction will bring the stop lever 19 into cooper ativ e engagementwith the cushioning pin '28 of the other collar? In Figure 2 the arrange-- ment is clearly illustrated, the view show ing the position of the lever 19 just belore it comes into engagement with one of the stop collars.

Inasmuch as it'is necessary to stop the lathe to remove finished bushings or other articles being turned and substitute bushing to be finished, the present invention proposes to provide a connecting link between the le ver 19 and the chuck controlling lever 8. Connected to the upper end of the lever 19 is a clevis 29 having oneend ot a link 30 pivotally connected thereto at 81; the other end of the link 30 is threaded. The threaded portion of the link passes through a spherinewness cal bearing 31 in a boss 32 on the operating lever 8. On the link 30 at each side of the boss 32 are nuts 33. The arrangement is such that the link 30 may slide through the spherical bearing 31 a predetermined disfrom the provision ot-a cont-r01 'lever'so dis posed that the operator can use-his right hand for removing. and placing the-bushings in the chuck while controlling: the 'movement ot the lathe'carriage with his left hand. A turther advantage. or the lllVGlltlOIllGSlClGS in the provision of stop means for automatically determiningzthe movement ot'theca-rriage and for controlling the movement of the carriage Still a further advantage ot the invention resides in 'thelost motion coir neeted between control lever19 and thecontrol lever B This last mentioned arrange ment permits ot the-stopping and starting 01" the lathe and the stopping and starting; of the carriage simultaneously and With a sin gle movement of the lever 8.

l v hil'e l have illustrated a specific embodr' ment of myinvention, it will be understood that the invention may be otherwise einbodied and that variousmodifications and changes may be made 1nthe constructionillustrated within the spirit of my invention and under the scope of the appended claims;

I claim: 1. The combination with an engine lathe having a carriage movable therealong, driving-ineans for thecarriage, a lever at one side of the carriage below the top of the can riage for controlling the operation" of said drivin i means, a vertically disposed operat ing lever pivotally mounted atthe other end of the carriage and projecting above the top oi the carriage,and a link connecting said operating lever with said first'lever.

2. Tile combination with an enginedathe' having a head stock,-a bed, a carriage reciprocablealon'gthe-bed, andme'ans for driving 'the carriage, or 'means for controllingthe operation of the driving means, and a V6I' tically disposed operating-1 lever on-the carriage at the GDCl'Ol the carriage nearest the head stock and having an operating exten sion projecting above the bed of the lathe for operating said carriage controlling means.

3. A control attachment for engine lathe carriages, having a; control lever at oneend of the carriage comprising a vertlcallyextending operatlnglever p votally mounted" 4. The combination with a lathe having a frame and a carriage reciprocable along the frame, automatic means for driving the carriage, a control for said driving means, a vertically disposed operating lever on the carriage projecting above the carriage, a link connecting the control lever with the control, and a pair of spaced stop elements disposed in the path of travel of said operating lever for tripping same upon a predetermined movement of the carriage in either direction.

5. The combination with a lathe having a frame and a carriage reciprocable' along the frame, automatic means for driving the carriage, a control for said driving means, a vertically extending operating lever on the carriage and projecting above the'carriage, a link connecting the control lever with the control, and a pair of spaced ad-' justable stop elements disposed in the path of travel of said operating lever for tripping same upon a predetermined movement of the carriage in either direction.

6. The combination with an engine lathe having a clutch, a carriage reciprocable along the bed of the lathe, automatic driving means for the carriage, a control for the carriage drive, and means for simultaneously operating the clutch and the control for the carriage driving means.

7. The combination with anvengine lathe having a chuck operating lever thereon and having a carriage reciprocable therealong, and having automatic carriage operating means with a control lever therefor, of an attachment for simultaneously transmitting motion from the chuck operating lever to the said control lever.

8. The combination with an engine lathe having. a chuck operating lever thereon and having a carriage reciprocable therealong, and having automatic carriage operating means with a control lever therefor, of an attachment for simultaneously transmitting motion from the chuck operating lever to the said control lever, and astop mechanism for independently effecting an actuation of the said control lever.

9. The combination with an engine lathe having a chuck operating lever and having a carriage movable along the lathe with automatic means for driving the carriage and means for controlling said driving means, of an attachment comprising a lever pivotally mounted on the carriage, a link connecting the lever with said control means, and a link connecting the lever onthe carriage with Tthe said chuck operating lever, said last'mentioned link having a lost motion con.-

nection with. the chuck operating lever.-,.

10. Theicombination with an engine lathe I havingachuck operating lever and having a carriage movable along the lathe with an.-

tomatic means fordriving'the carriage and means for controlling said driving means,

of an attachment comprising a lever pivotally mounted on the carriage, a linkconnecting the lever with said control means, and a link connecting the lever on the carvriage with the said chuck operating lever,

said last mentioned link having a lost motion connection with the chuck operating lever, and adjustable stops'in the path of travel of the lever on the carriage for effecting an operation thereof upon a predetermined movement of the carriage.

11. The combination with an engine lathe having a carriage, carriage driving means, a control for the carriage driving means, a link connected with the control and extending along the carriage, a lever on the other end of the carriage to which the other end Y of said link is pivotally connected, a second link connected with the opposite end of said lever, a clutch operating lever for the lathe through which thesecond link is slidably passed, and spaced apart stop elements on the second link for limiting the lost motion between the second link and the said clutch operating lever.

12. The combination with an engine lathe having a carriage, automatic driving means for the carriage, control for said driving means, and having a chuck operating lever, of an attachment therefor comprising a lever pivotally supported on the carriage, a link operatively connecting'the said lever on the carriage with thesaid means for controlling the automatic driving means for the carriage, a link connecting'the said lever on. the carriage with the said chuck operating lever, said'last link having a lost motion connection with the said chuck operating lever, a supporting bar 011 the lathe,-and adjustable stops on the supporting bar in the path of travel of the lever on the carriage for effecting an operation of the lever upon movement of the carriage to a predetermined extent, I

13. The combination with a lathe having a head stock, .a carriage, means for-driving the carriage, a control member for said driving means located at the end of the carriage remote from the head stock, a lever pivotally supported on the carriage at the end nearest the head stock, and a link connecting-the lever with said control member.

14. The combination with a lathe having a head stock, a carriage, means for driving the carriage, a control member for said drivremoter6111 the head stoclgalever pivbtally of said-level; said -stpps being adapted to. supported-0111M'carniagat che end-near effect anmpemtionofthe lever upon moveest thpflhe'ad stockywlink cdnnectingflthe' m'enbof' the-carriage ineither-direction to a 10 lever with said control 'membelya and a sup predetermined extent.

5 portingba-r on the lathe,- stops onthe snp-i In testimony" Wh reef I have hereunto set port-ingloar Havingicushioned lever engaging amyhand; mean's therenn (lispfis'eddn the'pathof travel BERNARD J. CALLAN.