US1565750A - Toothbrush - Google Patents

Description

Dec. 15 1925' 1,565,750 S, NATHANSON @@@THEUSH Filed Jun@ 20 i934 Patented Dec. 15, 1925.

SAMUELINATHANSON, 0F ROXBURY, MASSACHUSETTS.

TOOTHBRUSH.

Application filed .Tune 20, 1924. Serial No. 721,355.

T o all whom t may concern:

Be it known that I, SAMUEL NATHANsoN, a citizen of the United States, residing at 48 Stanwood Street, Roxbury, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Toothbrushes, of which the following is a specification.

The present invention relates to certain new and useful improvements inV tooth brushes.r

The objection to the ordinary tooth brush is due to the fact that it is very diilicult if not impossible to thoroughly cleanse the 1nside of the teeth.

The object of my invention is to provide a tooth brush that will cleanse the outside and inside of the teeth by the same operation.

Another object of my invention is to provide a tooth brush that by a very simple movement 'of the brush, it is adapted to present the brushes for operations either on the upper or lower teeth.

Another object of my invention 1s to provide means to keep the brushes in an extended position when not in use, means to enable the brushes to move in a straight horizontal line toward each other kwhen the brushes are in operation.

The invention will be hereinafter considered in detail and specifically claimed. Reference will now be had to the drawing forming a part of this application, wherein there is illustrated a preferred embodiment of my invention, but it is understood that the structural elements thereof can be varied or changed as to the shape, size or form without departing from the spirit of the invention.

In the drawings Fig 1 is a plan View of the tooth brush.

Fig.V 2 is a side View of the brush.

Fig. 3 is an end view of the brush.

10 re resents a handle made of a flat piece o metal bent into a U-shaped form.

Near the ends of the two prongs of this U-V shaped piece of metal there are two rectangular slots 11. The ends of the prongs are provided with pivots, 13 and 14, at which pivots the two brushes, 23 and 24, are pivotally attached. The brush 23 presents a convex surface and the brush 24 presents a concave surface to the teeth. The tooth brush is used so that brush 23 is applied on the outside and brush 24 on the inside of the teeth. The brushes are mounted so that theyare somewhat more distant from each other at the top than they are at the bottom. This is done for the reason that teeth are somewhat more wider near the gums than at the end, with the result that the brushing and cleansing of the teeth is done evenly all over the teeth. There are two flat arcuated pieces of metal, 15 and 16, forming a spring. One end of these two pieces of metal is solidly connected to the U-shaped prongs at 17, 18, 19 and 20. The ends of the arcuated pieces of metal 15 and 16 are provided with two extensions 25 and 26 which slidably fit into the slots 11 and have flat surfaces 27 and 28 at their ends. These two surfaces 27 and 28 are in contact with the brushes 23 and 24 only when the brushes are in use. The flat surfaces 27 and 28 press against the Hat surfaces of the brushes at 29 and 30 when the brushes are in use. This causes the brushes to remain firm and in place when in use.

Then it is desired to use the brushes on the upper teeth the spring is allowed to push the handles 10 apart causing the extensions 25 and 26 to recede, thereby allowing the brushes to rotate about their pivot at angle of 180 degrees. This places the brushes in position to be used on the upper teeth. A fiat piece of metal 21 is bent into a rectangular form and is solidly connected to one prong at 22. The other end of this rectangular form is left free. By means of this arrangement the prongs are forced to move toward each other in a straight horizontal direction.

In the normal position the brushes are kept apart due to the springs pressing against each other. When it is desired to operate the brushes to cleanse the teeth the operator presses the two prongs together bringing the two brushes in contact with the inner and outer surface of the teeth.

The end of the U-shaped piece of metal 10 may be used as a tongue scraper.

Having described my invention whatI claim is 1. A tooth brush comprising a U-shaped resilient member, brushes pivotally mounted at the ends of said member, said ends having slots therein, and springs connected to said U-shaped member and having extensions movable in said slots for the purpose described.

2. A tooth brush comprising a U-shaped resilient member, a brush mounted on each leg` thereof, and a spring connected at both ends thereof to each ieg of said U-shaped member, the said springs abutting euch l0 other at their intermediate portions for i'orcing said brushes apart.

SAMUEL NATHANSON.

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