US624435A

US624435A - John fielding

Info

Publication number: US624435A
Authority: US
Publication date: 1899-05-02
Anticipated expiration: 1916-05-02

Description

No. 624,435. Patented May 2, I899. J. FIELDING.

RIVETING ENGINE.

(Application filed Jan. 19, 1899.)

(No Model.)

lzi'fi asses UNITED STATES PATENT OFFICE.

JOHN FIELDING, OF BELMONT, UPTON ST. LEONARDS, ENGLAND.

RIVETING-ENGINE.

SPECIFICATION formingpart of Letters Patent No. 624,435, dated May' 2, 1899.

Application filed January 19, 1399. SerialNo. 702,683. (No model.)

To all whom, it ntay concern.-

Be it known that 1, JOHN FIELDING, a citizen of England, residing at Belmont, Upton St. Leonards, in the county of Gloucester, England, have invented a certain new and useful Improved Riveting-Engine, (for which I have applied for a patent in Great Britain, dated December 6, 1898, No. 25,669,) of which the following is a specification.

My invention relates to a riveting-machine worked by steam, compressed air, or other elastic fluid and so constructed that the rivet is subjected to direct'pressure, while it is also subject to percussion, as I shall describe, referring to the accompanying drawings.

Figure 1 is a longitudinal section, partly in elevation, of a riveting-machine according to my invention. Fig. 2 is a transverse section on the line as a: of Fig. 1. Fig. 3 is a section of a controlling-valve that may be used.

The body a of the machine, which carries the holding-back tool, has a cylindrical part occupied by a spring I) and has attached to it a cylinder 0, in which works a hollow piston d, carrying at its end the riveting-tool e. The piston dis bored toreceive a percussion-plunger f, which has its front striking part a little smaller in diameter than its rear part and has between these parts a recess 8, into which open ports g, formed in the wall of the piston d and communicating by channels h and '5 with the opening j for inlet and outlet of the working fluid. 7 Other channels m, formed in the wall of the piston 01, connect ports is and 1, opening into the interior of the piston d. The admission and emission of the working fluid is determined by a three-way cockn. 0 is a port opening to the outer air from the space in front of the percussive plunger f, and ports 19 open from the interior of the pisston d to an annular space g, which communicates with the outer air by a port 1'.

The machine works as follows: The plates to be riveted being placed with the rivet inserted in front of the'tool e, the cock at is turned to the position shown in Fig. 1, admitting the working fluid, which, acting on the piston d, drives it forward, pressing the riveting-tool on the end of the rivet. At the same time the fluid passes by the channels '5 h g to the recess .9 and pressing on the annular shoulder of the larger part of the plunger f forces the plunger back until this shoulder passes the ports 70, whereupon fluid passes by the channels m to the ports Z and through them into the space behind the plunger f, forcing it forward, so that its front end strikes the riveting-tool. When the rear end of f in .its forward stroke passes the ports 19, the fluid behindit escapes as exhaust, and the plunger f is again driven back to be again pressed forward, so that it makes rapidly repeated strokes upon the stem of the tool e, which is at the same time pressed upon the rivet by the fluid-pressure acting on the rear of the piston d. When the plug of the cook 12 is turned one-quarter around, the fluid is allowed to escape by the lateral opening, and the spring I) pushes the piston (1 back into position for a succeeding operation.

Instead of the three-Way cock 'n a valve such as that shown in Fig. 3 may be employed to determine the admission and emission of the working fluid. On pressing the springlever 25 the tubular stem to is pressed against the conical end of the stem of the valve '0, which closes the mouth of u, and by further pressure the valve U is moved from its seat, admitting working fluid to the machine. On relieving the pressure on t the valve 0 closes and the stem u retreats, so that its mouth is left open, whereupon the Working fluid passes through the bore of u and escapes by lateral apertures w.

Having thus described and ascertained the nature of this invention and the best means I know of carrying the same into practical effect, I claim- A riveting-machine comprising a cylinder fitted with a hollow pressing-piston which carries the riveting-tool, and has within it a percussive plunger, the cylinder and pressingpiston being provided with ports and channels for passage of the operating fluid, and a retracting-spring for the hollow piston, substantially as described.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

J Ol'IN FIELDIN G.

Witnesses:

OLIVER IMRAY, GERALD. L. SMITH.