US2651221A

US2651221A - Manually centered line boring machine

Info

Publication number: US2651221A
Application number: US60315A
Authority: US
Inventors: Edward A Foster
Original assignee: Individual
Current assignee: Individual
Priority date: 1948-11-16
Filing date: 1948-11-16
Publication date: 1953-09-08
Anticipated expiration: 1970-09-08

Description

Sept. 8, 1953 E. A. FOSTER 2,651,221 MANUALLY CENTERED LINE BORING MACHINE Filed Nov. 16, 1948 2 Sheets-Sheet l INVENTOR.

[da/ard A? 561%?" flayfmra ATTCI RN EYS Sept. 8, 1953 E. A. FOSTER 2,651,221

MANUALLY CENTERED LINE BORING MACHINE Filed Nov. 16, 1948 2 Sheets-Sheet 2 ATTEI RN EYS Patented Sept. 8, 1953 um-mp srAri-zs PATENT OFFICE. I

I I r 2,651,221 MANUALLY CENTERED LINE BORING f MACHINE I Edward A. Foster, Burger, Tex. I Application November 16, 1948, Serial No. 60,315 1 Claim. (01. 77-2) @My present invention relates to the general class of portable, ,manually operated boring machinesand more specifically to a manually centered line boring machine which, whilewell adapted for various purposesand uses,-is'-esp ecially designed for accuracyin boring the spaced bearings of motors or engines. The primary purpose of the invention is the provision or" a manually operated line boring machine of the portable type having means whereby'the boring bar may readily be adjusted in horizontal and vertical directions with a minimum expenditure of time and labor, and then rigidly supported in adjusted position for accurately boring the alined bearings.

The invention includes a minimum number of parts, some of which are interchangeable, that may be manufactured with facility and low cost of production, and the parts may be assembled with convenience, to provide a reliable machine that may be installed for use with ease, and which performs its functions with precision.

The invention consists in certain novel features of construction and combinations and arrangements of parts that are embodied in each of two or more bridges, or bearing supports for the boring bar that make up the tool, and in their adjustment mechanisms as will hereafter be described and more particularly set forth in the appended claim.

of the invention.

Figure 1 is a view in end elevation of one of the bridges showing its relation to an engine block on which it is mounted; and Figure 2 is a top plan view of the structures in Fig. 1.

Figure 3 is an enlarged vertical sectional view at line 3-3 of Fig. 2.

Figure 7 is a, perspective view of one of the two hold down blocks, or attaching blocks for the bridge.

In Order that the general arrangement and for tie bolts that unite the lower and upper portions of the engine. .These bolt holes are utilized in mounting and attaching two or more jof-the Each pair of arms is equipped with an interchangeable and adjustable hold down block, or

and threaded in the bolt holes of the flange F, the bridge may be rigidly fastened in operative position.

The usual boring bar with its tools, is adjustably mounted in alined split bearings of the trated at l0, and provided with a clamping bolt l l for mounting on the boring bar; and this reby means of a pair of spaced clamp bolts l4, l4,

and clamping keys I5, l5, that are retained on the reduced or pin ends of the clamp bolts.

ends 20 are threaded, permanently, in diametrically arranged sockets of the bushing 13. These bolts or screw bars, rigid with the bushing, are transversely adjustable transversely of the engine block, and for this purpose they are mounted between the spaced arched brackets, in transversely arranged spacing blocks 2 i and 22 that are rigidly fastened to the arches I and 2 by

bolts

23 and 24, the latter extending through the blocks and the arches and provided with lock nuts 25.

For laterally adjusting the pilot post and centering the boring bar, two opposed threaded bushings or hand-turned

nuts

26 and 21 are threaded on the outer ends 28 of the screw bars,

and each bolt or screw bar is rigidly clamped within its block in adjusted position by means of a clamp bolt or set bolt 29 threaded down through the block and provided with a reduced end or dowel pin 30 upon which a clamp key 31 is mounted for engagement with the threads of the screw bar.

Thus by manipulating the nut 11 for vertical adjustment and the

opposed nuts

26 and 21 for horizontal or lateral adjustment, the pilot posts may easily be centered with the boring bar mounted therein, for precise arrangement of the boring tools on the boring bar; and the manually operated boring bar performs its functions with efiiciency and facility.

Having thus fully described my invention, what I claim as Patent is:

-A portable cross bridge for supporting an adjustable tool comprising two laterally spaced arched brackets, a pair of oppositely extending arms on each bracket, a pair of screw bars mounted between the bracket in opposed relation to each other, a bushing threaded to the inner ends of the screw bars for supporting a pilot post, spacing blocks on the brackets and rigidly fastened thereto through which said screw bars pass, means on each screw bar for adjusting the position of the bushing with relation to the brackets and means carried by said brackets for holding said screw bars in adjusted position.

EDWARD A. FOSTER.

References Cited in the file of this patent UNITED STATES PATEN'IS Number Number