US621250A - Floor-boring machine - Google Patents

Description

Patented Mar. I4, |899.

No. 62I,250.

F. B. HOOKER. FLOOR BORING MACHINE.

(Application led Aug. 17, 1895.)

2 Sheets-Sheet I.

(No Model.)

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No. 62|,250. Patented Mar. I4, |899.

F. B. HOOKER. FLOOR BORING MACHINE. (Application filed Aug. 17, 1895.) (No Model.)

2 Sheets-Sheet 2.

'w/TNESSES.-

Mmm/ro@ fa/wf www. a 1. /g bww/'f 5y Nrrnn STATES FRANK B. HOOKER, OF ST. JOHNSBURY, VERMONT.

FLOOR-BORING MACHINE.`

SPECIFICATION forming part of Letters Patent No. 621,250, dated March 14, 1899.

Application filed August 17, 1895. Serial No. 559,649. (No model.)

To all whom, it may concern:

Be it known that I, FRANK B. HOOKER, a citizen of the United States, residing at St. Johnsbury, in the county of Caledonia and State of Vermont, have invented a new and useful Floor-Boring Machine, of which the following is a specification.

My invention relates to improvement-s in Hoor-boring machines in which a verticallyreciprocating boring-tool attached to an oscillating frame operates in conjunction with aV planing or matching machine for planing and matching flooring. I attain this object by the mechanism illustrated in the accompanying drawings, in which- Figure 1 is vertical side View. Fig. 2 is vertical front view, and Fig. 3 shows the machine attached to a planer or matching-machine.

Referring to the drawings,the numeral 12 indicates a rigid. frame provided with a bracket 23, having. suitable apertures by means of which it may be securely attached by means of screws or bolts to the bed of a planinglnachine (partly shown in dotted lines in Fig. 3) upon which the Work is to be done.

The numeral 11 indicates a swinging or oscillating frame which is pi-voted to the frame 12 by a bolt 4, upon which it is permitted to swing, as indicated by dotted lines in Fig. 2 of the drawings.

The numeral 2 indicates a mandrel which is j ournaled in bearings 5 and 17 in the frame 11 and is capable of a vertical reciprocatory movement in its bearings. The upper part of the mandrel is provided with a drum 1, which receives a rotary motion from a belt 27, passing over guide-pulleys 28, the belt receiving its motion from a lpulley attached to the running-gear of the planer or matching machine, or motion may be communicated to the mandrel from an independent countershaft. A screw or Worm 16 is keyed or feathered on the mandrel in such a manner that it will rotate with the mandrel when the same is revolved, but will permit the mandrel to have its vertical movement through it. Intermeshing with the Worm is a gear-Wheel 15, keyed on a shaft 14, which also has keyed upon it two cams 13, which bear against anti- 'friction-rollers 25, mounted in the end of arms 10, the upper ends of which are split, as inframe with it.

dicated at 2G, and adjustably clamped to a shaft 9, journaled in suitable bearings made in the frame 11, as shown in Fig. 2. Said shaft has keyed to it two levers 8, which are slotted at their free ends and embrace a collar 7, mounted upon the mandrel and provided with trunnions 24, which set in the slots of the levers. The collar is so mounted upon the mandrel that the latter may revolve freely therein, but will be reeiprocated by said collar, as hereinafter more fully explained. The mandrel is held normally up by means of a spiral spring 3, its movement being limited by means of a collar 6 and the bearing 5, heretofore mentioned. Mounted on the mandrel, near its lower end, between two col-lars a and b is a yoke 19, carrying at each end a pointed rod 21, which passes through saidyoke and is provided with a spiral spring 20,which bearsagainst the lower side of the yoke and the upper side of a collar o on said rod. These springs keep the pointed rods pressed downward upon the work which is to be operated upon with sufIicient force to carry the oscillating or swinging The mandrel is provided with a chuck 18 at its lower end to hold the boring-tool. i

The numeral 29 indicates a rod journaled at one end in a lug 32 on the bracket and at the other end secured to a lug on the oscillating frame, 'the rod being provided with a surrounding spiral spring 31, secured between the respective lugs. This spring serves to hold the oscillating frame and drill to its Work and to return said frame to normal position after the work is finished.

The stock to be operated upon is indicated by the numeral 30 and is shown in proper position for the action of the boring-tool, (indicated by the numeral 22.)

The oscillating or swinging frame 11 is formed with a bifurcated lower extremity 29, which straddles a rigidlyfixed transverse shaft 31, mounted in ears 32 on the frame 12, between one of which ears and the bifurcated extremity 29 a spiral spring 33 is interposed for Ithe purpose of returning the frameto its normal position after the work has passedbeneath the boring-tool.

The operation of the machine is as follows: Motion being imparted to the mandrel, the

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Worm 1G and gear-wheel 15 impart motion to the cams 13, which in their rotation press upon lthe rollers 25 and force back the lower end of the arms 10, which cause the shaft 9 to turn in its bearings and force downward the outer end of the levers 8, which in turn, being connected to collar 7, force down the mandrel and with it, by means of the yoke 19, the pointed rods 21. The downward movement of the rods is stopped by contact with the Work; but the downward movement of the mandrel continues, compressing the springs 2O and 3, the rods in the meantime being caused to move by the work into the position shown by the dotted lines in Fig. 2. When the cams 13 have made a complete revolution, the rollers will drop into the depressions of the cams, permitting the levers 8 to rise, and the spring 3, being relieved of its tension, will force the mandrel back to its normal position, the oscillating frame being swung back to its normal position by the spring 3l.

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

l. In a floor-boring machine, the combination of an oscillating frame, a revolving mand rel provided with a worm intermeshing with a gear-wheel keyed on a shaft carrying cams, arms mounted on a rock-shaft and operated by said cams, levers keyed to the rock-shaft and having their ends connected to a collar on the mandrel, and a spring for returning said mandrel to norm al position,substantially as specified.

2. The combination, in a iioor-boring machine, of an oscillating frame, a revolving mandrel mounted in bearings in said frame, a worm feathered on the mandrel,an intel-meshing gear-wheel, the arms provided Withfriction -rollers bearing against the cams and mounted upon a rock-shaft, and the arms keyed to said shaft and provided with slotted ends engaging a collar on the mandrel, whereby said mandrel is -moved longitudinally to advance the boring-tool to its work, substantially as specified. 3. In a door-boring machine, the combination with the oscillating frame and the rotatable mandrel jonrnaled therein, of mechanism substantially as described for forcing the maud rel down to its work, a yoke secured on the mandrel and carrying spring-pressed rods, a spring for holding the mandrel in normal p0- sition and returning it to such position, and a collar for limiting the upward movement of said mandrel, substantially as specified.

.FRANK B. HOOKER.

Vitnesses:

O. W. ORCUTT, RALPH HOOKER.

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