US1738062A - Hand sanding machine - Google Patents

Description

De@ 3, 1929-. E. l. DoDDs ET AL 1,738,062

HAND SANDING MACHINE Filed Jan. 5, 1927 wil/11114: A.

-7/ 20 Il l\|| 20 it/1an Dodds f fha/7 /4 @Odds Jr Patented Dec. 3, 1929 UNITED STATES PATENT OFFICE ETHAN I. DODDS, F CENTRAL VALLEY, AND ETHAN I. DODDS, JR., OF NEW YORK, N. Y.; SAID ETHAN I. DODDS, JR., ASSIGNOR TO SAID ETHAN I. DODDS, SR.

HAND SAN DING MACHINE Application led January 5, 1927. Serial No. 159,082.

This invention relates to a sanding machine. primarily adapted for sanding parts of vehicles and the like` but susceptible of `general use for sanding purposes.

It is an object of this invention to provide a light machine of the character stated which can be easily held by the hand of the operator and applied to the part to be sanded; a motor and suitable mechanism causing a sanding of the parts.

This'invention comprises the novel structure and combination of parts hereinafter described and more particularly pointed out and defined in the appended claims.

ln the accompanying drawings which illus trate a preferred embodiment of this invention and in which similar reference numerals re'fer to similar portions in the diii'erent viewsA (in the drawings:

Figure 1 is an elevational view ot a sanding` machine involving this invention with parts shown in section.

Figure 2 is an enlarged sectional view upon the line HMH.

Figure 3 is a fragment-ary end elevational view taken upon the line IIT-III of Figure l with the vibrating carriage omitted.

Figure l is an end elevational View.

its an exemplitication ot this invention, there is shown a base 1 having spaced stand a rds Q rising therefrom. A motor housing or casing 3 is attached to the base and is provided with a handle 4 whereby the machine may be held by the operator and applied to the work.

Upon thestandards 2 are journaled the gears 5--5 having irregular resilient pads. To this end each gear 5 is provided upon its outer face with a resilient and sloping contact means or hump which consists of an outer steel plate 6 or the like and an inner wedge shaped rubber pad 7 or the like. It will be noted that the Contact means on the two gears 5 are reversely arranged so that when the thickest portion of one is directed upwardly, the thickest portion of the other is directed downwardly.

The gears 5 mesh with small pinions 8-8 which are secured upon the ends of a motor shaft 9 extending through the casing 3, the I motor being mounted with the casing.

A vibrating member is provided in the form of a U-shaped frameand it consists of a support l0 having a sort ot dove tail 11 slidable connection with the base l which is provided with suitable bearing strips 11a having sloping sides to receive the dovetail, the base having lateral depending flanges 1a against which the strips are positioned. This base has a pair of oppositely .disposed upstanding arms 12 which terminate in bearings 15%*13 at their upper ends. These bearings have longitudinal bores closed by screw plugs 14. Resilient packing 15 such as rubber or the like is inserted in the bores and is compressed between the screw plugs 14 and anti-friction means 16 confined at the inner ends of said bores. The anti-friction means which are shown as in the torm of round elements or balls are in contact with the sloping means on the sides of the gears 5 for a purpose that will later appear.

Upon the bottom of the support 10, there is a resilient strip 17 ot rubber or the like, and a strip of abrasive material 18 such as sand or emery paper is applied over the strip 17 g opposite ends ot said strip 17 are brought up against the outer ends ot the arms 12 und clamped thereagainst by metal clamps 19 on screws 2U set in the arms 12.

ln the operation oi" the ma chinee the motor will be started for operating the gears 5, which during their rotation will cause the vibration or backward and forward movement of the vibrating member. This movement is brought about by the inclined humps on the gears 5 which are oppositely inclined, for as the thick part of one hump rides oil its bearing ball 1G, the thick part of the other hump will ride upon its bearing ball. Consequently, there will be a vibratory or reciprocatory movement ot the vibrating member which carries the abradant means and it will be obvious that if the machine in operation is applied to any parts that need polishing or that need to be rendered smooth, the vibration of the abradant surface thereover will quickly accomplish the desired result.

We are aware that many changes may be made, and numerous details of construction may be varied through a wide range without departin from the principles of this invention, an we therefore do not purpose limiting the patent granted hereon, otherwise than necessitated by the prior art.

We claim as our invention:

1. In a sanding machine, a stationary member including a motor, a pair of gears on said member and driven by said motor, said gears having oppositely disposed resilient and inclined faces, a U shaped frame having a slidable connection with said stationary member, the arms of said U shaped frame having anti- -friction means in engagement with `said inclined faces and abrasive means carried by said U shaped frame.

2. In a sanding machine, a motor having a shaft, a frame for supporting the motor, an abradant member slidably mounted upon the bottom of the frame, said member having upstanding arms and driving means between the ends of the motor shaft and said arms.

3. In a sanding machine, a frame, a motor su ported thereon, an abradant member slidabile upon said frame, said motor having a shaft, and a driving connection between each end of said shaft and said member.

In testimony whereof, we have hereunto subscribed our names.

ETHAN I. DODDS. ETI-IAN I. DODDS, JR.

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