Improvements in and relating to dental chairs / [Frank Ritter].

  • Ritter, Frank
Date:
1897
Catalogue details

Licence: Public Domain Mark

Credit: Improvements in and relating to dental chairs / [Frank Ritter]. Source: Wellcome Collection.

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    5 10 15 20 25 30 35 40 45 50 55 3 N° 20,295.—A.D. 1897. Ritter's Imj/rovements in and relating to Dental Chairs. efficient. Three rods for each movable part arranged circumferentially as shown are very suitable though the improvement is not limited to the particular number. As the movable sections descend at times into the oil holder they and their connections are thereby constantly lubricated. The accessibility and detachability of the various parts are desirable and novel features of construction are employed. The space occupied and the danger of breaking in transportation is thereby diminished as also is the cost of repairs. The accessibility of the pump and its operating devices is a practically important feature. The described construction whereby these and other advantages are secured are hereinafter pointed out and the best forms and arrangements known to me have been set forth but variations that involve simple mechanical skill and that have the same principles of construction and operation are not excluded. Having now particularly described and ascertained the nature of my inven¬ tion and in what manner the same is to be performed, I declare that what I claim is: 1. In a dental chair the combination of telescoping tubes, guide rods fixed between the tubes and tube flanges provided with openings to receive and fit the rods, whereby the tubes are guided and steadied and whereby independent rotation is obviated, substantially as described. 2. In a dental chair the combination of telescoping tubes, guide rods fixed to flanges in the movable and fixed pedestal sections and situated interiorly thereof and exterior tube flanges provided with openings to receive and fit the rods, substantially as described. 3. In combination with the elevating mechanism, the telescoping tube 7 having an exterior flange ll1 and an interior flange 12, a guide rod, fixed in one of the flanges, and a guide rod movable through the other, substantially as described. 4. In a dental chair the combination of telescoping tubes having flanges and guide rods and a spring situated between the flanges to prevent jar, substantially as described. 5. In a dental chair the combination of the oil tank, the telescoping pedestal sections and the guide rods, said rods and sections being adapted to be lubricated by descent into the tank, substantially as described. b. In a dental chair the combination of the base, the pedestal rotatably sup¬ ported on said base, the wedge-block situated between the pedestal and base, and block-moving devices to crowd said block against their walls, substantially as described. 7. In a dental chair the combination of the base, the pedestal rotatably sup¬ ported on said base, the edge-block situated between the* pedestal and base, and block-moving devices to crowd said block against their walls, said devices consisting of a screw, a detachable screw turning bar and means for adjusting the bar with respect to the .screw, substantially as described. 8. 1 n a dental chair, a pedestal having an opening or doorway and a cover or door to close the same substantially as described. J. In a dental chair a pedestal having an opening or doorway and a cover or door 29 said cover being detachably secured to the pedestal and engaging- under a rib 42 thereof, substantially as described. 10 In a dental chair the combination of an oil holder, a pedestal section adapted to be moved into the holder, a piston tube 33, and a pump, said pedestal section having an inset part 34 to permit it to descend beside the pump, substantially as described. 11. In a dental chair the combination of an oil holder, a pedestal section adapted to be moved into the holder, a piston tube 33, and a pump, said pedestal section having an inset part 34 to permit it to descend beside the pump,
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