US 1750194 A
Description (OCR text may contain errors)
March 11, 1930. c. G. A. RYDMAN DENTAL MIRROR Filed March 31, 1928 IN VENTOR CARL 6'. A. RYJMAN.
Patented Mar. 11, 1930 CARL G. A. BYDMAN, OF OAKLAND, CALI FORNIA DENTAL maaoa j Application filed March 81, 1928. Serial No. 266,219.
The present invention relates" todental I mirrors, and itsprinc'ipal object is to provide in combinationwith a dental mirror a lighting attachment arranged in such 'a way that the light rays emanating from a source of light are reflected from the surface of the mirror and illuminate the mouth so as to fac-ilitate the inspection of the teeth.
It is particularly proposed to arrange the light attachment in such a manner that the same forms a natural part of the handle of a dental mirror so as to in no way interfere with the convenient manipulation of the latter. It is further roposed to provide control means for the light attachment that ma be easily operated, and is arranged in suc a manner as to not interfere with the normal use of the instrument.
Further objects and advantages of my invent-ion will appear as the specification proceeds;
The preferred form of my invention is illustrated in the accompanying drawing, in which Figure 1 shows a vertical section through myi combination mirror and light attachment, an
Figure 2 an enlarged fragmentar detail view partly in section of the contro end of i the device.
While I have shown only the preferred form of the invention, I wish to have it understood that various changes or modifications may be made within the sec e of the claims hereto attached without eparting from the spirit of the invention.
In its preferred form, my device comprises a handle 1 having a dental mirror 2 secured to one end thereof and arranged at an angle suited for the convenient inspection of a er- *sons teeth. 1 The upper end of the hand e 1 comprises a tubular element 3 having a bat tery 4 accommodated therein, and formed at one end with a reflector6 in which is accommodated an electric light lobe 7, while the other end of the tube 3 is c osed by means of a cap 8 threaded thereon with a washer 9 interposed between the co. and the tube. The cap is'formed with abe l-sha d pro ection 11 into which is threaded a p ug 1Q servthe mirror 2. The arrangement of the switch member and spring .fingers mounted in the ing as a guide for the stem 13 of a contact 14, which latter is substantially ball-shaped and is held in either one of two end positions'by means of spring fingers 16. The outward end' of the stem 13 is formed with a knob 17 facilitating the operation thereof.
The battery 4 contacts with one terminal of the light filament as at '17 and with the other terminal through the contact 14 when the latter is pushed inward, connection being established through the spring fingers 16, the tube-3, and the reflector 6.
The manner of using my device will be readily understood from the foregoing description. To light the lamp 7, it is merely necessary to push in-the knob 17, while for extinguishing the light the knob is pulled outward. T e tube 3 formin practically a straight extension of the handle 1, does not interfere with the convenient operation of the device, and in fact is as convenient as the wooden handle normally providedfor this purpose. The 1am is arranged so that the rays fall directly rom the reflector 6 upon at the end of the tube 3 is a particular advantage, since it ofl'ers no obstruction to view when the dentist examines the teeth while manipulating the mirror.
In combination, a tubular handle, a dental 'mirror supported at an an le thereto, a battery in the handle, a light in one end of the handle so as to reflect on the mirror and being electrically connected to the battery and the tube respectively, a cap threaded on the other end of the handle having afswitch member movable therein, for electrically connecting the tube and the battery, a ball on said switch cap in engagement with the ball for holding,
the switch member in active or inactive position.
' CARL G. A. RYDMAN.