Patent GB-169151-A (GB)
Title: Improvements in and relating to dental appliances
IPC: A61C19/00
Filed: 1921-08-19
Abstract: 169,151. Pieper, O. H., and Pieper, A. F. Sept. 14,1920, [Convention date]. Stands and the like; pumps, syringes, and like appliances.-The invention relates to a dental appliance of the kind described in Specifications 17497/15 and 117,753, and the improved apparatus comprises a plurality of instruments removably held in a casing hinged to a wall support, switch and valve control devices for regulating the operation of the instruments, and extensibleconductors located in the casing permitting the removal and use of the instruments. In Figs. 1, 3 and 7 a hot-air syringe 20, cautery 21, holder 22, lamp 23 and air nozzle 24 for use with an atomizer are shown supported by a bracket 19 on the upper part 17 of the casing 15, the spring clips 25 for the instruments having contact members which are closed to complete circuit when the instruments are removed for service. The air and current conductors for the instruments are looped round weighted pulleys 41, 44 movable along guide rods 37 of a frame 39 so that when an instrument is returned to the casing after use the supply wires or tube is automatically positioned within the casing. Filtered compressed air is supplied to the instruments 20, 24 through a tube 52, Fig. 7, leading to pressureregulating valves 47 controlled by handles 48 extending through the front panel 18. From these valves, air passes through tubes 45 to couplings 30 forming the upper members of the tubes passing over the weighted pulleys. The air pressure supplied to the instruments is indicated by gauges 50, Fig. 1. The conducting wires 56 for the heater of the hot-air syringe 20 are connected to the coupling 56<a> and lead to the instrument through the air tube. The electrical connections and transformer construction of the apparatus are substantially the same as described in Specification 17497/15. The transformer 57 for regulating the current to the various instruments is on the rear side of a distributing board 58 fixed to the panel 18. The transformer switch arms 62 are connected with the respective contacts 34 on the cross bracket 33 and thence to the instruments. The primary coils of the transformer are adapted for connection with a series of binding posts on the back of the panel. Two of thesecontacts are connected through a conduit 65, Fig. 3, supported by clips 66, 66<a> so as to permit the opening and closing of the casing without interruption of the circuits. From the distributing board, connections are made through a conduit 68 with a rotary or other type converter. The main supply line 69 is in circuit through the conduit 65 with a main switch 70 operable by a handle 70<a>. A connection is made from the main switch to the converter through a switch operable by a handle 72 for controlling the low voltage circuits. A pilot lamp 73 enclosed in a casing 74 indicates whether the main switch is closed. The voltage to the lamp may be increased for purposes of illumination by shortcircuiting by means of a handle 80 a resistance 78 in the lamp circuit. For heating the atomizers with which the air nozzle 24 is employed, the receptacles 82 contain heating coils which are in a high voltage circuit controllable by a handle 85. Sockets 86, and switches controlled by handles 89, 90 on the panel are provided to supply power to any high voltage apparatus which may be used in conjunction with the device.