Improvements in dental engines / [Charles Edward Rhone].

  • Rhone, Charles Edward.
Date:
1893
Catalogue details

Licence: Public Domain Mark

Credit: Improvements in dental engines / [Charles Edward Rhone]. Source: Wellcome Collection.

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    JV° 4346 A.D. 1893 Date of Application, 28th Feb., 1893—Accepted, tth Apr., 1893 COMPLETE SPECIFICATION. Improvements in Dental Engines. Charles Edward Rhone, a citizen of the United States of America, learning at Bellefonte, in the County of Centre, in the State of Pennsylvania, United States of America, Dentist, do hereby declare the nature of my invention for Improvements in Dental Engines, and in what manner the same is to be 5 performed to be particularly described and ascertained in and by the following This invention relates to dental engines which are usually attached to the wall and operated by a motor. obie?t °f this invention is to provide an engine arm capable of universal adjustment in any direction which is free to be adjusted at the will of the operator and which will maintain itself in its adjusted position without manipulation of a set sciew or other locking device on the part of the operator. 1 lie object of the invention is further to provide an automatic tension device for . ^ e driving cord whereby said cord is automatically elongated or contracted and o the tension regulated and maintained when the arm is swung in any direction and even when said arm is axially elongated or shortened. . ^ Jgure 1 of the accompanying drawings represents a perspective view of this improved dental engine. Figure 2 represents a transverse section through the extensible arm thereof, and the clamp for holding the telescopic sections of said arm in extended positions against the tendency of the driving cord to contract said arm. 4 igure 3 represents a plan view partly in section of the inner end of the engine arm and the swiveled bracket to which it is pivoted, showing the spring clamp for 7?°Iding said arm in adjusted position on said bracket and permitting it to move 25 freely at the will of the operator. 4 igure 4 represents a plan view of the under side of the telescoping sections of the engine^arm showing the clamp for holding them in position on each other. 4 igure 5 represents a fragment of the swiveled bracket, a transverse section of the engine arm and the spring clamp for holding said parts together. 4 igure 6 represents a fragment of the swiveled bracket and a portion of the spring clamp for holding the engine arm in contact with said bracket. 4 igure 7 represents a horizontal section of one of the self-adjusting slides for regulating the tension of the driving cord, the pulley attached to said slide and the guide rod on which the said slide plays. . Figure 8 represents a fragment of the swiveled bracket to which the engine arm is attached, said bracket being provided with a downwardly and rearwardly extended arm carrying pulleys for the driving cord, whereby said pulleys are located adjacent to the center of motion of said swiveled bracket. 4 igure 9 represents the engine head detached from the engine arm. Figure 10 represents the tension device showing the movable slides in the position which they assume when the driving: cord is driving: the tool in forward motion. & 4 igure 11 represents the tension device showing the movable pulleys in the position which they assume when the cord is moving in a direction to drive the 45 drill in a reverse motion. Figure 12 represents a perspective view of this improved dental engine provided with a modified form of spring clamp for holding the engine arm in adjusted position on the bracket and permitting said arm to move freely at the will of the operator, the tension device for the driving cord being omitted. Figure 13 represents a horizontal section of the supporting bracket, a portion [-/'rice 8d,J 30 35 40 50