US630589A - Power-driven tool. - Google Patents

Description

Nn. 630,599. Patented Aug. a, |899. F'. H. CATHCART.

POWER DRIVEN TUOL.

(Application filed Juy 8, 1897. Renewed July 3, 1899.)

2 Sheets-Sheet l,

@No Model.)

IIHIIIIIIIIIH y A mii w: Nonms PETERS co Pao No. 630,589. Patented Aug. 8, |899. F. H. CATHCART.

PWER DRIVEN TOOL.

(Application led July B, 1897. Renewed July 3, 1899.) (No Modal.) 2 Sheets-Sheet 2.

VUNITED STATES PATENT OFFICE.

FRANK II. CATIIOART, OF ALEXANDRIA, VIRGINIA, ASSIGNOR TOfTI-IE EMPIRE ENGINE AND MOTOR COMPANY, OF NEI/V YORK, N. Y.

PowER-DRNEN Tool..

SPECIFICATION forming part of Letters Patent N o. 630,589, dated August 8, 1899.

Application led J'uly 8,1897. Renewed July 3, 1899.' Serial No. 722,697. (No model.)

To all whom, it nfl/tty concern.:

Be it known that I, FRANK H. CATHCART, of Alexandria, in the county of Alexandria and State of Virginia, have invented certain new and useful Improvements in Power- Driven Tools, of which the following is a complete specification, reference being had to the accompanying drawings.

The object of my invention is to produce an improved tool operated by a self-contained fluid motor or engine whereby the compactness, durability, and general'efciency are materially increased. A

In the accompanying drawings, Figure I is a longitudinal central vertical section, with parts in elevation, of my machine. Fig. II is a section on the .line II II of Fig. I. Fig. III is a section on the line III III of Fig. I.

Referring to the figures on the drawings, 1 indicates one portion of a two-part cylinder, and 2 the other portion thereof. Each portion is provided with opposite longitudinal flanges 3 and 4, respectively, which are constructed to make close joints one with the other and when united, as by screw-bolts 5, to complete the cylinder.

The two-part cylinder above describedis that form which I prefer to employ; but I do not limit myself to that particular construction. 4 shorter than the length of the cylinder-sections in order to provide spaces upon the opposite ends for exterior screw-threads. (See Fig. I.)

The screw-threaded ends 7 of the complete cylinder are adapted to accommodate internally-screw-threaded flanges or rims 8,th at extend, respectively, in opposite directions fromthe cylinder-head cylinder-sections 9 and 10, respectively. The sections 9 and l0 are preferably formed integrally with end Walls l1 and l2, respectively, which constitute, in effect, cylinder-heads. The Wall l1 is provided with a closed bearing 13 or box, having an in-l ternal bushing 14. The wall l2 is provided With a cylindrical bearingr I5, provided With a bushing I6. The bushings 14 and 16, being in concentric alinement, are adapted v.to accommodate a piston-shaft 17 ,whichcarries any preferred form of rotatory piston 18, provided with transverse blades or piston-heads 19.

I prefer also to make the flanges 3 andl 2O indicates the fixed abutment piece, which Works in the peripheral depression 2l of the piston and operatively separates the ports 22 and 23. v 24. indicates a fluid-supply-pipe connection adapted, by the aid of suitable valve mechanism, (indicated at 25,) to supply the actuating fluid-as, for example, steam or airalternately to the ports 22 and 23 as required.

The mechanism above described does not constitute a part of my present invention herein described and claimed, but is illustrated by way of example of one form of embodiment of a rotary engine.

Coming now to a description of that mechanism which constitutes the embodiment of my present invention, 26 indicates an extension-cylinder, which preferably constitutes a continuation of the section 9 and which preferably terminates in a cylinder -head 27, screwed or otherwise secured to the end of the extension-cylinder. The extension-cylinder Vaccommodates a piston-head 28, to which is secured a piston-rod 29, which, working through a packing-box 30 in the cylinder-head, is connected with a suitable supporting-frame 3l. In a thickened portion of the wall of the extensioncylinder I provide steam supply passages 32'and 33, communicating with the valve-chamber 34, Within which works a suitable valve-,as, for example, the valve 35 controllable by means of a lever 36.

V,37indicates an exhaust-port, and 38 a Huidpressure supply-pipe communicating with the interior of the valve-chamber, included in the mechanism indicated at 25.

Through manipulation of the lever 36 steam fmay be admitted to one side or the other of the piston 28, thereby feeding the motor to or Afrom itswork, as required.

It is frequently desirable in adapting machines of the class to which my invention belongs to special uses to provide Within the machine a form of reducing or multiplying gear which will not `materially increase the size or weight of the machine or disiigure the symmetry of its exterior form. l For this purpose I provide a spindle 39, which is revolubly carried in coaxial alinement with the shaft 17, and upon the contiguous end of the shaft a pinion 40, secured thereto. Meshing IOO with the pinion 40 I provide a gear 4l rotatably mounted, as upon a stud 42, the gear 4l being provided with or laterally secured to a second pinion I3. The second pinion meshes with a gear -I-L, that is secured to the spindle 39.

45 indicates a case which, in connection with the plate 46, made integral with the part l2, to which it is secured, as by bolts +L7, in connection with the stud 42, protects the train of gear above described from the intrusion of dust or other deleterious substance.

By the arrangement above described I provide a compact and self-contained system of reducing-gear that may be concealed by the ease 45 and which constitutes but a slight enlargement of the cylinder-head wall 12. Multiplying-gear could of course be substituted for that illustrated by substitution in the ordinary manner of proper gears and pinions.

Through the employment of the sections 9 and 10, respectively, in the manner described I am not only able to increase the compactness and adaptability of my machine, but in that manner I am enabled to render the section 9, carrying the cylinder extension 26, and the section l0, carryingthe reducing-gear, interchangeable with ordinary cylinder-heads, so that any engine of the ordinary type may be converted into a self-contained feedingengine, or vice versa, simply through the interchange of the parts specified.

1. The combination with a rotary-engine cylinder and piston-shaft, of a cylinder-head upon the cylinder, provided with a wall or diaphragm, and a closed shaft-box in the diaphragm for the piston-shaft, of a cylinder extension upon the cylinder-head coaxial with the shaft-box in the diaphragm, a piston working within the cylinder extension, a head upon the end of the cylinder extension, a pistonrod connected with the cylinder and passing through the head of the cylinder extension, a supporting-frame connected with the piston-rod, and means for supplying power alternately to the opposite sides of the piston, substantially as and for the purpose specified.

2. The combination with a terminally-screwthreaded cylinder, piston, and piston-shaft of a rotary engine, of a terminally-threaded movable cylinder extension adapted to screw upon the end of the cylinder, a fixed piston within the movable cylinder cooperating therewith and a diaphragm within the cylinder extension provided with a closed shaftbox to accommodate the piston-shaf t, whereby interchange between the cylinder extension and an ordinary cylinder-head may be conveniently effected, as required, substantially as and for the purpose specified.

In testimony of all which I have hereunto subscribed my name.

FRANK II. CA'II'ICAR'I.

IVitnesses:

J. DU PRATT WHITE, torur. C. APPLEGA'IF.,

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