724 



THE INDIA RUBBER WORLD 



[September 1, 1917. 



New Goods and Specialties. 



APPLIANCE FOR MAXILLOFACIAL MECHANOTHERAPY. 



IN a recent number of "The Dental Cosmos" appears an inter- 

 esting article In- Emile Linet on a new appliance for maxillo- 

 facial mechanotherapy, to overcome contractures of the man- 

 dible. The appliance, 

 shown herewith, con- 

 sists of two levers of 

 the first class con- 

 nected together at the 

 fulcrum point. One 

 end of each 1 c v e r| 

 bears a small, strong 

 tray, into which fits a 

 piece of soft rubber to 

 protect the teeth. The other end of each lever, i. c. the "force" 

 end, bears two pairs of knobs which serve for the attachment 

 of elastic rubber bands. Such bands, of known strength, are 

 supplied with the appliance. The superior lever carries a scale, 

 upon which a pointer upon the lower lever registers in milli- 

 meters the vertical distance between the two trays, i. i'. the 

 separation distance of the jaws. 



The action of this instrument can be definitely measured and 

 controlled and tends gradually to reduce and finally eradicate 

 contractures, whether of cutaneous, articular or muscular origin. 

 [The S. S. White Dental Manufacturing Co., Philadelphia, 

 Pennsylvania.] 



VULCANIZED RUBBER HAIR-PARTER. 



A simple device which enables the user to be independent 

 of a mirror and to part the hair easily and with exactitude 

 consists of two flat strips of vulcanized rubber which may 



be bent lengthwise to 

 conform with the shape 

 of the head. These 

 strips are pivoted to- 

 gether, edge to edge, 

 so that either strip 

 may be swung around 

 independently of the 

 other. The strips are 

 laid with their con- 

 fronting edges along 

 the line where the part 

 is to be made. One 

 strip holds the hair 

 down on an imaginary 

 line, while the other 

 sweeps the free hair to 

 one side, making a 

 straight and even part- 

 ing. [James Maxwell, 



Senior, 108 West Forty-third street. Xew York City.] 



SILUMINITE; A NEW INSULATOR. 



This new insulating material is a hard black substance, ringing 

 like slate, but of far greater strength ; it can be sawn, filed, 

 drilled, tapped, turned, and j)olished with ease, and can be 

 molded to any shape in the course of manufacture, but not 

 afterwards. It is not softened by heat (it is subject to a tem- 

 perature of more than 600 degrees F. at the makers' works) 

 and is not brittle. Immersion in oil or caustic alkali, or boiling 

 water, leaves it unchanged, and it is non-hygroscopic. It possesses 

 high dielectric strength, this being between 10,000 and 13.000 

 volts per millimeter. Its structure is homogeneous and dense, 

 the weight of a square foot ^^-inch thick being 2.4 pounds. 



Metal parts can be insulated by compressing Siluminite on them 

 in any desired shape, thus avoiding the cementing or screwing 

 process now necessary in most cases. Tlie substances with 

 which it will most directly compete are porcelain, glass, mica, 

 fiber, ebonite, wood, slate, marble and molded compounds. It 

 is supplied in the form of rods, sheets, tubes and various molded 

 specialties. [The Siluminite Insulator Co., Limited, Southall, 

 London, England.] 



THE "KANTSINK" SWIMMING HARNESS. 



The beaches are thronged with bathers, the majority of whom 

 cannot swim, yet are eager to learn, and a trustworthy aid that 

 does not cumber the wmdd-be swimmer's movements should 



find a ready 



market. In the 

 apparatus 

 shown i n 

 the accom- 

 panying illus- 

 tration a rub- 

 ber tube is 

 fastened t o 

 the body with 

 one buckle 

 and traveling 

 loops that per- 

 mit perfect ad- 

 justment. The "Kantsink" swimming harness is made in two 

 regular sizes, one for children up to 16 years and the other for 

 men and women up to 40-inch bust measure. Extra large sizes 

 are also furnished, if desired. [Kant Sink Swimming Harness 

 Co., Traverse City, Michigan.] 



RUBBERIZED SHARKS. 



Sharks of such gentle disposition that feminine bathers may 

 ride them over the waves are the latest seashore diversion, 

 taking the place of the familiar surf-board. This ferocious 

 appearing hut harmless semblance of the man-eater that ter- 



rorized the -Atlantic coast last summer is made of rubberized 

 fabric, inflated with air. It is light in weight and can be easily 

 carried, yet it will support an adult and provides a means for 

 the performance of many clever and thrilling water "stunts." 



