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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    Ritter's Improvements in and relating to Dental Chairs. at 35 to permit the tube 8 to be rotated within tube 7 to cause said flanges to register in assembling the parts, substantially as described. 12. In a dental chair the combination of the pedestal, the pump, the lever- member 20 fixed to the fulcrum 21 at the exterior of the pedestal, said fulcrum consisting of a rod pivoted in the pedestal wall, the short lever-member consisting 5 of a sleeve secured to the rod and provided with arms, a second rod extending through said arms, a piston-connecting-rod loosely joined to the said second named rod, and returning springs attached to the latter rod outside its bearings in the arms, substantially as described. 13. In a dental chair the combination of a pedestal having a door opening, a 10 lever having its fulcrum situated in the opening and bearing in the pedestal wall, lever-returning springs and a projection 28 arranged to engage the pedestal and arrest the action of the springs substantially as described. 14. In a dental chair the combination of the telescoping pedestal sections and the sectional ring 16 provided with screws for setting the ring against the inner 15 pedestal section, substantially as described. 15. In a dental chair the combination of the seat tube, the pedestal and the frusto-conical split plug to adjust the bearing connection of said tube and pedestal, substantially as described. 16. In a dental chair the combination of the cross-bar of the seat frame, the 20 seat tube provided with a shoulder, and a nut engaging the tube above the shoulder to fasten the bar on the tube, substantially as described. Dated this Third day of September 189T. CHARLES JUNGE, Agent for the Applicant. 25 lie.Hull : Printed for Her Majesty’s Stationery Office, by Malcomson & Co,, Ltd.—1897-
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