US349728A

US349728A - Drilling-machine

Info

Publication number: US349728A
Authority: US
Publication date: 1886-09-28
Anticipated expiration: 1903-09-28

Description

'2 Sheets-Sheet 1.

(No Model.)

BIL. MANSFIELD.

DRILLING MACHINE.

L'eZcZ n 00 wa M 8 w W 2 i n L M p e E3 S d .w n 6 b a N. PETERS. Pholo-Lilhcflrapher, wnshingmn, D. c.

2 Sheets-Sheet 2.

(Nb Model.)

ELL. MANSFIELD. DRILLING MACHINE;

Patented Sept. 28,1886.

M M w 2 W W W Z W N. PETERS, Plv J-Lilhogrmpher, Walhiuginri, D c

UNITED STATES PATENT OFFICE.

EDWIN LASELIJE MANSFIELD, OF BOSTON, MASSACHUSETTS.

DRILLING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 349,728, dated September28, 1886.

Application filed July 8,1886. :Serial No.207,435. (No modl 1.)

To all whom it may concern:

Be it known that I, EDWIN LASELLE MANS- FIELD, of Boston, in the county of Sufiolk, of the Commonwealth of Massachusetts, have invented a new and useful Improvement in Boring-Machines; and I do hereby declarethesame to be described in the following specification and represented in the accompanying drawings, of which Figure 1 is a top view, Fig. 2 a side elevation, Fig. 3 a front end view, and Fig. 4 is a longitudinal and median section, of a machine embodying my invention, the nature of which is defined in the claims hereinafter presented. Fig. 5 is a top view, and Fig. 6 a front elevation, of the toothed rails G and H, hereinafter explained. Fig. 7 is a side view of the impeller P of the pattern-bar. Fig. 8 is a front view of the bar 9, with its series of studs.

This machine is to bore, simultaneously, a series of bars alike in form, and each either straight or curved, in correspondence with a pattern-bar having in it a series of holes, such bars being used in the manufacture of upright piano-fortes.

In the Said drawings, A denotes the frame for either directly or indirectly supporting the main operative parts of the machine, such frame having in its lower portion a horizontal platform, a, on and extending above which are two parallel rails, 19 1), upon which the grooved wheels 0 of a fiat carriage, B, rest and run, such rails being arranged longitudinally in the frame. The carriage -B is furnished with a pair of rails, d d, that extend across it transversely, and support the wheels 0 of a second or work-supporting carriage, D, provided at its front and rear ends with flat rails f 9, extending up from it, and being to support the pattern-bar E and a series of bars, F, of like shape to be bored. There is hinged to the back rail, g, which has a series of studs or points, z, projecting upwardly from it, a bar, h, which, when turned downward over and upon thepattern-bar and the bars to be bored, serves to hold them upon and keep them properly apart on the studs and the two rails f and g, the studs 2' at the time entering holes or recesses at or next the rear ends of such bars.

Between the bearing-rails f and g, and extending across the work-supporting carriage D, is a stationary toothed rail, G, and a mov- ,able toothed rail, H. 'Each of the said rails has jaws or teeth k, projecting up from it, each of the teeth of each bar being projected somewhat into the space between two next adjacent teeth of the fellow bar. The pattern-bar, as well as the bars to be bored, extend between the teeth of the two rails G and H, and are clamped or held by them by moving the movable rail sufliciently forward. Such movable rail is pivoted to the lower arm of a lever, L,

which at its foot is fulcrumed in and to a projection, m, from the frame A. Inthe upper part of the lever L there is an angular slot, a, in which is placed a roller, 0, pivoted within a furcated arm, p, extending from the bor ngtools spindle-carriage M. The said carriage M is adapted to play or. move vertically within the frame A. It has within it and sup ports a series of,boring-tool arborsor spindles,

r, provided with pulleys s, to receive endless beltsextending from a like number of pulleys, t, fixed on a driving-shaft, u,-arranged as represented 'Each of the said spindles is to be provided with aboring-tool,o,'extending down from it. Besides the said spindles, there is within the carriage M a comically-pointed plunger w, that slidesfreely vertically within the carriage, and is placed directly over and to engage with the pattern-bar by the conical foot of the plunger entering a hole in said bar. A shoulder, or, on the plunger, by resting on the base y of the carriage M,determines the distance to which the plunger can move downward in the carriage. A spiral spring, 2, encompassing the plunger and extending from'the said shoulder up to the upper bearing-bar, a, of the spindles, serves to press or hold the plunger down in engagement with the pattern-bar while the carriage is descending and the boring of the other bars is being effected. I

The carriage M has mechanism for moving it upward and downward,such mechanism consisting,in part,of a T-lever, N, connected with the carriage by a link or toggle, b, and with the top of the frame A by another such toggle or link, 0, and also with a stationary post, (1', by-a third link, 6, all being as represented. Under the carriage M, and extending across the frame. A, is a stationary fiat bar, 0, in

which are guide-holes for the plunger and the shaft, the longer arm of the said lever being jointed to the carriage M. While such carriage M is descending the impeller will be retracted and will pass out of engagement with the pattern-bar until the inclined stud of the impeller may come over another hole in such bar, in which case the impeller will drop, so as to cause the stud to pass into the said hole. On the carriageM being next moved upward, the impeller, by its action on the pattern-bar, will advance it and the two carriages immediately under it the distance for the plunger to enter the next hole in the pattern-bar, and thereby determine the extent of movement of the several bars for them to be next bored by the boring-tools of the spindles. As the bars may be advanced, they will slide between the teeth of the rails Gand H, and being usually more or less curved lengthwise, such bars will be kept by the said toothed rails in their proper relations with the several boring-tools, as the bars in moving forward between the teeth of the rails will cause the sustaining-carriage of such bars to move laterally more or less as may be required. During each descent of the spindle-carriage, the plunger will pass down into a hole in the pattern-bar and will hold it, and of course the carriage,stationary,

This impeller, at its rear while the boring-tools may be operating on the other bars, During a rise of the spindlecarriage the pattern and other bars will be moved forward the requisite distance for the boring of the next holes in the bars.

From the above it will be seen how a series of bars, each of which is like the pattern-bar in shape and size, may be simultaneously bored, until each like it shall have within it a like number of holes at like distances asunder.

- I claim 1. The machine, substantially as described, consisting of the spindle-carriage provided with the plunger and series of boring-tool spindles, and with mechanism for imparting to it (the said carriage) reciprocating vertical movements within the frame of the machine, the stationary pointed plunger and boringtoolsguide-bar, the set of toothed bars, the work-supporting carriage and its sustainingcarriage arranged in and applied to the frame, as set forth, the movable toothed bar, and the pattern-bar, having mechanism, as explained, for operating them, as specified.

2. The combination for operating the spindle-carriage, such combination consisting of the T-lever and the three links, two of which are jointed to it and the carriage and its supporting-frame, while the third of said links is jointed to the said lever and to a stationary post, all being substantially as represented.

EDWIN LASELLE MANSFIELD.

Witnesses:

R. H. EDDY, R. B. TORREY.