US1236611A - Floor-planer. - Google Patents

Description

A. SHlELDS.

FLOOR PLANER. APPLICATION FILED NOV. I4- 1916, 1,286, 1 Patented Aug. 14, 1917.

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ALFRED SHIELDS, OF BLOOMINGTON, INDIANA.

rLoon-rLAivER.

To all whom it may concern.

Be it known that I, ALFRED SHIELDS, a citizen of the United States, residing at Bloomington, in the county of Monroe and State of Indiana, have invented certain new and useful Improvements in Floor-Planers, of which the following is a specification.

This invention relates to floor planers, and moreparticularly to planers of that type in which a rotary element is provided having a plurality of cutting or planing knives.

One of the main objects of the invention is to provide a planer of the character stated of simple construction and operation which may be easily operated and in which the planing blades may be adjusted vertically as desired. A further object is to provide a planer so mounted as to permit give of the frame of the planer thus preventing possible breakage or damage to the machine. Further objects will appear from the detail description.

In the drawings:

Figure 1 is a side view of a planer constructed in accordance with my invention, with the side of the frame removed;

Fig. 2 is a top plan view of the same;

Figs. 8 and 4: are details.

The vertical side walls 1 of the planer are of irregular polygonal shape and are secured together, near their back ends, by a transverse brace 2, which is secured to the same with its ends turned upward at right angles. This brace receives the stub-shafts 2- of the forks 2 which carry the casting wheels 2. The upwardly and rearwardly inclined side arms 3 are secured to the side plates 1 and have their upper ends secured together by a cross piece 4. This structure provides gripping means for pushing the machine over the surface to be operated upon. A shaft 5 is'rotatably supported by the arms 3 and has one end squared as at 5 to receive the eye 6 of an operating crank 6. A sprocket wheel 7 is keyed on shaft 5 and is operatively connected by a chain 8 to a pinion 9'mounted on a transverse shaft 10 which is rotatably mounted in the. side plate 1 of the frame. A spur gear 11, the diameter of which is approximately three times as great as the diameter of pinion 9, is mounted concentric with the pinion and is secured thereto, and a balance wheel 11 is secured on shaft 10 adjacent the other end thereof.

This spur gear meshes with a pinion 12 Specification of Letters Patent.

Patented Aug. 14, 1917.

Application filed November 14, 1916. Serial No. 131,289.

secured on the transverse rod or shaft 13 rotatably supported by the side plates 1. This pinion is concentric with, and is secured to, a spur gear 14: which is also mounted on shaft 13 and is approximately of three times the diameter of pinion 9. This gear meshes with a pinion 15 keyed on the shaft 16 of the blade drum 17. The ends of shaft 16 of this drum fit into slots 18 in the side plates 1 near the front ends thereof and in alinement transversely of the machine. The upper portion of each slot 18 extends vertically and the lower portion is inclined slightly rearward as at 18. When the knife drum 17 is in position the pinion 15 is enmeshed with gear 14 and is positioned below the axis of this gear so that the knife drum cannot move vertically in the slots.

At each side of the machine, near the front thereof, a vertical supporting standard 19 is slidably mounted through blocks 20 secured to the plate 1. This standard is provided at its lower end with a stub shaft 21 on which is rotatably mounted the front ground or supporting wheel 22. The upper end of the standard 19 is slidable in a vertical recess 23 at the center of a block 24. secured to plate 1 at the upper edge thereof. A coil spring 25 is mountedin this recess, about the reduced upper end portion 19 of standard 19. The reduced portion or stem 19 of the standard extends through an aperture in block 24: and is threaded to receive an adjusting hand wheel 26 threaded there on. The springs 25 act to force the standards 19 downward so as to support the knife drum a proper distance from the floor surface while, at the same time, providing a resilient mounting for this drum which permits sufficient vertical give of the front portion of the machine to prevent serious injury to the knife drum or blades carried thereby in the event of the drum encountering an obstacle which the knives cannot properly operate upon. By rotating the hand wheels 26 so as to compress the springs 25 greater downward pressure will be exerted on the standards 19 thus adjusting the mounting of the front portion of the machine and the knife drum. By this means the adjustment of the drum may be varied to suit circumstances.

The drum 17 is provided with a plurality of integral raised ribs or arms 17* each of which is provided with a rectilineal face 17 b ed to receive cutter knife or blade 32 se cured thereto by set screws 33. This knife is secured to the fiat face 17 of the arm and extends the full length of the drum. When the drum is rotated these blades encounter the floor surface and act to plane the same. By means of the crank 6, sprocket chain 8, and the connecting gearing, the drum 17 can be driven at very high speed by rotating the sprocket 7 at a relatively low speed. When the planing operation has been completed, by detaching pinion 15 from the drum shaft 16, the knife drum 17 may be removed from the machine and replaced by a grinding or finishing drum.

A hand lever 34: is connected at one end by pin and slot connections, as at 35, to each side plate 1. This lever is pivoted intermediate its ends, to the standard 19, as at 36. By depressing these levers the standards 19 may be forced downward positively so as to lift the knives 32 out of operative engagement with the floor surface thus permitting the machine to be freely moved from place to place.

The machine is provided, on its front wall 37 with the usual bumping block or beam 38 secured thereto. This beam may be made of any suitable resilient material and acts to prevent injury to walls of rooms in which the machine is used through contact of the machine body with the walls.

As will be noted from Fig. 2 of the drawings, all of the drive gears and the supporting wheels are included within the side plates 1. By this construction my machine is specially adapted for use in rooms or halls where it is desirable to plane the floor close to the walls. The fiat outer faces of plates 1 will fit snugly against the face of the walls of the room without scarring or marring the same, the side plate fitting above the usual base board, thus bringing the end of the knife-drum l7 closely adjacent the base board. This renders it possible to plane a floor up to thebase-board, the side plate 1 providing spacing and guiding means for this purpose.

What I claim is:

1. In a machine of the character dethe combination of two spaced side plates, 1 rear supporting wheels, a block secured to each side plate at the upper edge and near the front end thereof, each of said blocks being provided with a central recess, a vertical standard slidably mounted on each side plate and operative through the recess of the said block, said standard having its upper end portion reduced and threaded, a supporting wheel carried by the standard at the lower end thereof, a coil spring mounted about the reduced portion of the 75 standard and confined within the recess of the blockand adapted to exert downward pressure on said standard, and adjustable means for varying the compressionof said spring.

3. In a machine of the character described, the combination of two spaced side plates, rear supporting wheels, a resiliently mounted vertical standard slidably mounted on each side plate, a supporting wheel carried by each standard at the lower end thereof, means for adjusting the resiliency of the mounting of saidstandard, arotary knifedrum supported by the said side plates adjacent the wheels carried by the standards, and means for causing rotation of 'said drum, the said standards, supporting wheels, and means for rotating the drum being all mounted between said side plates. A

In testimony whereof I affix my signature 1 i in presence of two witnesses.

ALFRED SHIELDS.

Witnesses: I

ROY L. WHrrn, W; F. IIEPLEY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of- Ratents', Washington, D. (2. 1

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