US821825A - Drilling-machine. - Google Patents

Description

No. 821,825. PATENTED MAY 29, 1906.

DB WITT K. PEGK.

DRILLING MACHINE.

APPLICATION TILED MAYlS, 1905.

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DRILLING MACHINE.

APPLICATION FILED MAYIB, 1905.

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No. 821,825. PATENTED MAY 29, 1906. DE WITT K. PEOK.

DRILLING MACHINE.

APPLICATION FILED MAY18.1905 5.

5 SHEETS-SHEET 3.

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PATENTED MAY 29, 1906.

DE WITT K. PEGK.

DRILLING MACHINE.

APPLICATION FILED MAY 18. 1905.

5 SHEBTSSHEET 4 u 1 n m n u w m n n a a m m m w o c M u a c s w z a u N A No. 821,825. PATENTED MAY 29., 1906. DB'WITT K. PEOK. DRILLING MACHINE.

APPLICATION FILED MAYIB. 1905.

5 SHEETS-SHEET 5 DE WITT K. PECK, OF NEW BRITAIN, CONNECTICUT.

DRILLING-MACHINE.

, Specification of Letters Patent.

Jratenteq May 29, 1906.

Application filed May 18, 1905. Serial No. 260,978.

To all whom, it may concern:

Be it known that I, DE WITT K. PEoK, a citizen of the United States, residing at New Britain, in the countyof Hartford and State of Connecticut, have invented certain new and useful Improvements in Drilling-Machinesyand I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in automatic drilling-machines, and more particularly to one designed for drilling doorknob spindles and similar articles. I,

' The object of the invention is to provide a simple, durable, and efficient machine of this character which will be entirely automatic in operation and which may be readily adjusted for different kinds of work.

With the above and other objects in view the invention consists of certain novel features of construction, combination, and arrangement of parts, as will be hereinafter described and claimed.

In the accompanying drawings, Figure 1 is a side elevation of an automatic drillingmachine constructed in accordance with my invention. Fig. 2 is a vertical longitudinal sectional view through the same on an enlarged scale. Fig. 3. is a vertical transverse sectional view taken on the line 3 3 in Fig. 2. Fig. 4 is a top plan view, partly in section. Fig. 5 is a detail sectional manner in which the drill slide or carriage is reciprocated. Fig. 6 is a detail horizontal sectional view taken on the line 6 6 in Fig. 2; and Fig. 7 is a detail longitudinal sectional view through one of the drill-spindles, show- 'ing the manner of mounting the same and the manner of securing and adjusting the drill therein.

Referring to the drawings by numerals and letters, 1 denotes the bed-plate of the machine, which is adapted to be supported horizontally upon legs 2 in a suitable oil-tank 3.

Upon the bed 1 is mounted to slide longitudinally a reciprocatory drill carriage or slide 4, which has upon its up er side a frame 5, forming a support for a p urality of drillcarrying spindles. The carriage or slide 4 .has its sides beveled outwardly to engage a dovetail groove 6, formed in the top of the bed 1, and, if desired, packing-strips 7 may be secured by screws 8 in one side of the view showing the groove 6 in order to take up the wear between thecarriage or slide and the bed.

The frame 5 comprises four uprights 9, secured upon the top of the carriage or slide 4 and connected by longitudinal rods or bars 10 and by transverse bars 11 and 12, the latter of which form caps which connect the front and rear pairs of uprights 9. The crossbars 11 are arranged in pairs, and between each pair is slidably and adjustably mounted one or more bearing-blocks 13 in which are journaled spindles 14, which carry the drills 15 at their inner ends. The bearing-blocks 13 have their tops and bottoms grooved to engage the opposing faces of the pairs ofbars 11, so that they may slide longitudinally therebetween, and they are adapted to be held in an adjusted position by means of setscrews 16;

In the drawings I have shown three pairs of the bars 11 and two bearing-blocksbetween each pair; but it will be understood that the machine may be constructed so that any desired number and arrangement of these parts may be employed, according to the kind or character of the work to be operated upon. The drill-spindles 14 are disposed longitudinally between the front and rear pairs of uprights 9, and suitable ballbearings 11 are provided in the bearingblocks 13 in order to reduce friction to a minimum. The drills 15 are secured in the front or inner splitends 18 of the drill-spindles 14 by means of conical clamping-sleeves 19 or in any other suitable manner, and they are adapted to be adjusted longitudinally in the spindles 1.4 by means of adjusting screw-rods 20, which extend through bores 21, formed in the spindles 14. These-adjusting-rods 20 have finger-pieces 22 at their rear ends, so that the threaded portions of said rods may be screwed into and out of the threaded portions of the bores 21, as clearly shown in Fig. 7 of the drawings. The tubular spindles 14 are prevented from moving endwise in their bearings by nuts 23, screwed upon the externally-threaded rear ends of said spindles.

The drill-spindles 14 may be rotated in any desired manner; but I preferably provide upon each of them intermediate the bearing-blocks 13 a grooved pulley 24 and con-' drive-belt or the like passed around a pulley 29 upon said shaft. The grooved pulleys 24 are secured upon the'spindles 14 by keys 30,

which are retained by set-screws 31 in longitudinal grooves formed in the drill-spindles.

The drill carriage or slide 4 is reciprocated toward and from a stationary work feeding device 35, disposed at the front or inner end of the bed 1 by providing suitable driving connections between it and a transverse shaft 36, which is j ournaled in suitable bear-, ings 37 beneath the inner end of the bed. This shaft 36 has keyed thereon, as shown in Figs. 3 and 5 of the drawings, cam-wheels 37, which engage and coact with the forward hook-shaped ends 38 of rods 39, which have their rear ends pivoted, as shown at 40, in depending brackets 41, secured upon the under side of the slide or carriage 4. The inner hooked ends 38 are supported and held in operative relation with respect to the camwheels 37 by brackets 42, which are secured upon the under side of the bed 1.

It will be seen upon reference to Fig. 5 of the drawings that as the shaft 36 is rotated the cam portions of the wheels 37 will suecessively engage the hooks 38 of the rods 39 to move the latter inwardly, and hence to reciprocate the spindle slide or carria e 4 inwardly to move its drills 15 toward t e work upon the feeding device 35. The drill carriage or slide 4 is returned or moved rearwardly, preferably by means of a weight 43, which is suspended from one end of a cord or other flexible connection 44, passed over a guide-pulley 45, j ournaled in a bracket upon the outer end of the bed 1 and secured upon a link 46, fastened upon the center of the rear end of the slide or carriage4.

The shaft 36 is preferably driven by securing thereon a sprocket-wheel 47 and connecting the latter by a sprocket-chain 48 to a sprocket-wheel 49 upon a shaft 50, mounted in suitable bearing-brackets 51, secured upon the tank 3..

As shown in Fig. 1 of the drawings, the shaft 51 carries a band wheel or' pulley 52, which is connected by a belt 53 to a pulley 54 upon a power-shaft mounted in suitable brackets or hangers 55.

The embodiment of the invention illustrated in the accompanying drawings is particularly adapted for drilling the screw-holes in the ends of door-knob spindles, and the device 35 for automatically feeding the doorknob spindles to the drills 15 comprises a right-angular plate or block 56, which is disposed transversely and secured upon the top of the inner end of the bed 1. Upon the inner face of the upright portion 57 of the block or plate 56 are formed transversely-extending dovetail grooves in which are slidably mounted dovetail bars 58. Two of these bars 58 are adjustably mounted in. each of said grooves by means of set-screws 59, and the blocks upon each side of the device have riveted or otherwise secured to them verticallyextending guides 60 for the door-knob spindles S or other work which is to be operated upon. These guide-rods 59 have their opposing inner sides grooved, as shown at 60, to engage the ends of the spindles S,and the latter are held in said grooves by a centrally-disposed upright guide 61 in the form of a right angular bracket adjustably secured upon the top of the bed 1 in front of the work-feeding device and between the vertical rows of drills. This uide-bracket 61 is adjustably secured, so t at door knob spindles or other work of different dimensions may be fed between it andthe end guides 58 by forming its lower base portion 62 with a slot 63 to receive a clamping-screw 64. The upper ortion of the guide-bracket 61 is supported y U-shaped brackets 65, secured centrally, as shown at 66, and having their slotted ends or arms 67 adjustably secured upon the side edges of the upright portion 57 of the plate 56 by setscrews 68, as

clearly shown in Fig. -6 of the drawings. It will be seen that the guides 58 and 61 form a magazine through which the drill-spindles S are fed by gravity and that by adjusting said guides the device may be adapted for receiving door knob spindles or other work of various sizes. A suitable chute or hopper 69 is provided at the top of thefeed device, and the finished spindles S are removed or discharged into the tank 3 by a rotary drum 70, keyed or otherwise secured upon the shaft 36, as clearly shown in Figs. 2 and 3 of the drawings. This rotary discharge drum 70 is formed in its periphery with a series of longitudinally-extending ockets adapted to successively aline with t e discharged end of the feeding device 35 as the shaft 36 is rotated.

The construction, operation, and advan tages of the invention will be readily understood from the fore oing description, taken in connection with t e accompanying drawings. It will be seen that the machine is entirely automatic in operation, since the doorknob s indles are fed continuously and successive y before the drill-spindles, which are rotated and reciprocated continuously.

While I have shown and described the referred embodiment of my invention, it wi 1 be understood that I do notwish to be limited to the precise construction herein set forth,. since various changes in the form, proportion, and the minor details of construction may be resorted to without departing from the principle or sacrificing any of the advantages of this invention.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a drilling-machine, the combination .of a reciprocatory slide carrying drilling devices movable therewith, relatively fixed means to feed the work across the path of the drilling devices, a moving work-ejecting element coacting with the work-feeding means to hold the work stationary while being drilled, means controlled by the work-ejecting element to move the slide in the required direction to feed the drilling devices to the work, and alternately-acting means to move the slide in the reverse direction while the work-ejecting element is effective to remove the work from the work-feeding means.

2. In a drilling-machine, the combination of a reciprocatory slide carrying drilling devices movable therewith, relatively fixed means to feed the work across the path of the drilling devices, a revolving work-ej ecting element coacting with the work-feeding means to hold the work stationary while being drilled and having pockets to register with the workfeeding means and receive the work therefrom, means controlled by the workejecting element to 'move the slide in the required direction to feed the drilling devices to the work, and alternately-acting means to move the slide in the reverse direction while the work-ejecting element is receiving the work from the work-feeding means.

3. In a drilling-machine, the combination of a reciprocatory slide carrying drilling devices movable therewith, relatively fixed means to feed the work across the path of the drilling devices, a revolving work-ejecting element coacting with the work-feeding means to hold the work stationary while being drilled and having pockets to successively register with the work-feeding means and receive the work therefrom, a cam revolublewith the revolving work-ejecting elesaid blocks, a guide-bracket adjustably secured upon said support and adapted to engage the front of the work to hold the same in said channeled end guides, and U-shaped brackets upon said guide-bracket adjustably secured to the upright portion of said plate.

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

' DE WITT K. PEOK.

Witnesses:

ALFRED WILLIAMS, SHERMAN PECK.

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