US1500365A - Transportable throttle device - Google Patents

Description

Jul 8, 1924.-

J. C. CARLTON TRANSPORTABLE THROTTLE D BVICE Filed March 23, 9 2 Sheets-Sheet l heots-$befl 2 J. C. CARLTON TRANSPORTABLE THROTTLE DEVICE July 8 1924.

Patented July 8, 1924.

UNITED STATES JACK C. CARLTON, or CINCINNATI, onio, AssreN'oR TO THE CARLTON MACHINE 'roon PATENT OFFICE.

COMPANY OF CINCINNATI, OHIO, A CORPORATION OF OHIO.

TRANSPO'RTABLE THROTTLE DEVICE.

Application filed March 23, 1922. Serial No. 546,138. I

To all whom it may concern: 1 7

Be it known that, LJACK C. CARLTON, a citizen of the United States, and residing at Cincinnati, in the'county of Hamilton and State of Ohio, have invented a new and useful Improvement in Transportable Throttle Devices, of which the following specification is a full disclosure.

My invention relates to a transportable throttle device for a fluid motor whereby the motor can be controlledfrom a station most convenient to the operator.

An object of the inventionis to provide a fluid motor with a throttle device for controlling the fluid supply and exhaust to and from the motor, the throttle having a flexible conduit cable connection with the motor, adapting the throttle to be transportative to a place of utilization most convenient to theoperator.

Another object is to provide a portable toot treadle throttle device connecting with a fluid motor by a flexible conduit cable, to throttle the supply and exhaust of fluid to and from the opposite sides of'a fluid motor piston.

Another object of the invention relates to the construction of a fluid motor to render the same readily applicable to a commercial machine tool as power mechanism for actuating a hand operated lever or device of the machine tooL'the motor being controlled through a foot treadle controller, having an extended flexible connection with the motor, whereby the controller is transportable from one place of service to another for accessibility to the operator of the machine at his working po-- sition.

The features of the invention will be more fully described in the description of the accompanying drawings, forming a part of this specification, in which:

Fig. 1- is a perspective view of a radial drill, equipped with my improved pressure fluid controlling mechanism for operating a fluid motor actuating clutch or clamping mechanism, for clamping the sleeve carrying the radial arm to the column upon whichthe sleeve is revolubly mounted. Fig. 2 is a central vertical section of the column base of the drill, illustrating the i tati ybindi g P -9 eeve to the colum mechanism employed for frictionally nonand the lever mechanism for actuating the lever mechanism for the clamping mechanism.

Fig. 3 is a detail view illustrating in side elevation the fluid motor for operating the clutch actuating mechanism, the motor fluid connection leading to a foot actuated throttle Or valve'device for controlling the fluid for motor piston actuation, the valve device being shown in top plan view, with a portion thereof in horizontal section. I

Figs. 4: and 5 aredifferent side elevations of the foot throttle.

Fig. 6 is a top plan view of the fluid motor.

Fig. 7 is an end elevation thereof.

Fig. 8 is a central horizontal section through the motor.

In machine tools, especially those of large caliber, it is desirable'to have the controlling mechanism for the machine within convenient access or reach of the operator, to avoid the necessity of his leaving his working position to eflect'a c'o'ntrohas well as *to have a quick acting and easily operated control. 1

In this capacity, my improvement is admirably adapted to radial drills, for controlling the clamping --mechanism between the revolvable radial arm carrying sleeve and column supporting the sleeve, so that the operator at any working position with in the working range of the tool can quickly clamp or unclamp the sleeve for an arm swing adjustment, without being' required to leave his working position to operate the clamping mechanism. Although the disclosure herein pertains to radial drills, it is evident that the transportable foot throttle, in flexible conduit connection with the motor, and the motor, can find application in other fields and for other uses.

1 Referring to thedrawings, l'indicates the base of a radial drill upon which, at one end, is secured a vertical tubular column 2. The column revolubly supports a sleeve 3 concentrically engaged over the column. The sleeve 3 supports a horizontal arm 4, the arm being vertically adjustable upon the sleeve and carries ahead-stock 5 horizontal ly adj ustable'upon the arm.

The sleeve is clamped to the column by friction brake mechanism, which, however,

ll b e e re t are a eni??? ring 6, interposed between the column and sleeve and preferably at the base of the sleeve, the ring being expanded by a ringspreading device operated by a lever arm 7. The brake mechanism per se embodies a distinct improvement and is made the subjectematter of a separate applicatlon, for a more complete detail description of wh 1ch. reference may be had to such application, filed of even date herewith, Serial No. 546,136.

A link 8 at one end connects with the arm 7 and the opposite end thereof connects with a lever arm 9 fixed on the end of the rock shaft 10, journaled in a bearing base of the column and in a bearing 11 in the base 1. The outer end of the shaft 10 has a hand lever 12 fixed thereon for manually controlling the ring 6, for clamping or releasing the sleeve. The hand lever 12 is provided with depending ears 13, 13, for connecting the piston rod 14, of the fluid motor 15, to the lever. The connection is preferablymade by link 16 pivotally connected to and between ears 13, 13, at one end and to the yoke head 17 of the piston rod 14, to provide a flexible connection between the piston rod and hand lever accommodating for the arc of swing of the lever ears.

The fluid motor 15, comprises a cylinder 18, engaged through a cylindrical bracketbody 19, split for frictionally clamping the cylinder within the bracket body. The bracket body is provided with a lateral extension 20 for bolting the bracket to the top surface of the base 1, and suspendingly hanging the cylinder axially parallel with the face side of the machine base 1. The forward end of the cylinder has a head plate 21, screw threaded into the end of the cylinder and provided with a stufling-box through which the piston rod 14 is engaged. The-inner end of the piston rod has a piston connected thereto, consisting of a pair of oppositely disposed packin'gs 22, 22, mounted between disks 23, 24, secured together by screws 25, the disk 24 being secured upon the end of the piston. rod 14. Fluid connections tap into the opposite ends of the cylinder, which alternately provide inlet and exhaust conduits for admitting and exhausting the fluid from opposite sides of the piston for piston reciprocation.

As shown, elbow fittings 26, 27, are respectively threaded into the opposite ends of the cylinder and coupled respectively upon the .ends of the flexible tubes or hose 28, 29, whichextend through a'flexible conduit 3O tothe foot throttle. The conduit 30, at one end, is fixed within a hub 31 upon the end of bracket extension 32, of the bracket 20, while the opposite end ofthe conduit '30 is fixed within a hub 33 of the body 34 of the foot throttle. The conduit protects the several lines of hose and compactly combines them as a unit. A third or main fluid supply line or hose 35 also extends through the conduit to the foot throttle.

The foot throttle comprises a body or casting 34, having an extended base 36 apertured to receive the treadle 37 journaled upon the rod 38, mounted within the base The treadle is provided with an upwardly extended arm 37*, having an adjusting screw 38 transversely extended therethrough, adapted to engage the outer end of a slide valve 39. The arm 37 has a lug extending from its rear side for engagement with the top surface of the base to limit the return stroke or movement of the treadle. The body 34 is bored and cored to form a valve chest into which the ends of the fluid lines or tubes 28, 29, 35, tap, coinmunicating respectively with chambers 40, 41, 42, formed by a valve sleeve 43 engaged into the base of the body. The slide valve 39 slides within the valve sleeve 43 for covering and uncovering ports as apertures through the sleeve 43, for controlling the fluid supply and exhaust to and from the motor. The inner end of the slide valve engages a spring 44 seated against a plug 45 threaded within the valve chest base in the body. The plug is provided with openings 46 therethrough communicating with the in teri'or of the valve sleeve as exhaust ports. The forward stroke of the valve is limited by an adjustable stop pin 47 engaged through the plug 45.

The valve is provided intermediately with an annular groove forming a valve chamber 48, between the sleeve and valve, for estab lishing communication alternately between the main fluid supply pipe and the pipes or tubes connecting with the opposite ends of the motor cylinder.

The chamber 40, at the left side of the valve chest, connect-s through tube 28, with the left end of the motor cylinder, and chamber 41 at the right side of the valve chest connects through ,tube 29 with the right end of the motor cylinder. The chamber 40 communicates with the extension'of the valve sleeve, through apertures 49,49, at opposite ends of the chamber, and chamber 41 similarly communicates with the interior of the sleeve through apertures 50, 50, through thesleeve at opposite ends of said chamber for the supply and exhaust control.

The supply chamber 42 communicates with the valve chamber 48, through apertures 51, through the sleeve and alternately communicates with the chamloersv 40, 41,

through the control of the valve.

Thus,when thevalve is in its normal or foremost position, as shown in Fig. 3, the

valve chamber 48 establishes communication between the main supply chamber 42 and chamber 41 directing the fluid pressure against the right end of the piston, for moving the piston to the left. In this position of the valve, the chamber 40, through the left end perforation 49, is open to the atmoshere throiwh the sleeve and vent 0 enin s The operator, for a throttle adjustment in one direction, depresses the treadle and holds the same in its depressed position for a period desired for one directi on of operation of the drill sleeve clamping mechanism and upon release of the treadle, the spring 44 automatically moves the valve in a return direction for a reversal.

In practice, the normal position of the throttle is utilized for a clamping control,

clamping the sleeve to the column. The

fluid pressure is maintained against the piston to hold the said clamping mechanism under pressure in a position which will retain and hold the clamping mechanism in its active position, so that the column is always locked to the sleeve, while the machine tool is in operation.

Should the operator desire to swing the drill arm, the throttle treadle is depressed, controlling the fluid pressure to and from the motor for a reversing or clamping mechanism releasing operation. The arm and its sleeve are instantly locked to the column as soon as the operator releases the throttle treadle. The throttle is portable and can be stationed at any convenient accessible point for the operator, the advantages of such portability and accessibility being readily apparent.

The throttle and motor, as a unit, are readily applied to any of the commercial machines, and the motor is so applicable at a location most convenient for making connections with the mechanism to be actuated thereby.

Having described my invention, I claim:

1. A radial drill column clamping device comprising a fluid motor operated clamp, a fluid motor, a transportable throttle for con trolling fluid pressure to and exhaust from said motor, a flexible primary supply conduit extending from the motor to the throttle and communicating with said throttle, secondary flexible conduits attached to said motor and throttle communicating with both, and alternately with said primary conduit through said throttle, and a flexible protecting cable enclosing all conduits and attached at opposite ends to said motor and throttle.

2. A radial drill column clamping device comprising a fluid motor operated clamp, a fluid actuated motor comprising a cylinder, and a piston movable in said cylinder, a transportable throttle for controlling fluid supply to and exhaust from said motor, a flexible primary supply conduit secured to said motor and throttle and communicating with said throttle, secondary flexible conduits attached to said motor and throttle, communicating with said throttle and motor respectively at relatively opposite sides of said piston, and alternately with said primary supply conduit through said throttle, and a flexible cable enclosing all conduits attached at opposite ends respectively to said motor and throttle.

3. In a radial drill, the combination of a column, asleeve rotatably adjustable upon said column, clamping means for non-rotatively clamping said sleeves to the column, power mechanisms for actuating said clamping means, and a transportable throttle valve for controlling said power mechanism, having flexible conduit connection with said power control mechanism, said throttlenormally effective for maintaining said power mechanism and correspondingly said clamping means in position for clamping said sleeve to the column, said throttle valve being manually operable for controlling the power mechanism for clamping release.

4. In a radial drill, the combination of a column, a sleeve rotatably adjustable upon said column, clamping means for non-rotatively clamping said sleeve to the column, power mechanism for actuating said clamping means, and a throttle valve for controlling said power mechanism, normally effective for maintaining said power mechanism and correspondingly said clamping means in position for clamping said sleeve tothe column, said throttle being manually operable for controlling the power mechanism for clamping release.

In witness whereof, I hereunto subscribe my name, as attested by the two subscribing witnesses.

JACK C. CARLTON. Witnesses:

R. Krs'rm, L. A. BECK.

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