- Email: [email protected]
DENTAL HYPODERMIC SYRINGE.
880 0’ Orophone,"which would serve as a preparatory instrument until a more powerful one could be used. The transmitter has no tab to fasten it on to the (lothing, or any means of being attached to the battery, so that the battery may be used as a pedestal or support. The receiver ear-cap is DENTAL HYPODERMIC SYRINGE. unnecessarily large for the size of the diaphragm used, and Messrs. Burroughs, Well come, and Co., Snow Hill Build- the diaphragm is not adjustable, while the battery is too ings, London, E C., have made an improved pattern of their large to be carried in the pocket. The flexible cords are and well fastened off, so that the mechanical strain dental hypodermic syringe, which has been strengthened and on the covering and not on the conductor; but the comes of its in some The shown in the parts. simplified syringe illustration is made entirely of metal, is easily taken apart for receiver cord is too lorg, and the method of fastening the cleaning and sterilising, and as easily put together again. cord on to the transmitter entails taking the transmitter to No packing is required round the piston, which consists of a pieces to put on a new cord. The instrument may not prove solid plain metal plunger, ground to fit the barrel accurately. very economical, because there is no switch in circuit to use The barrel, cap, nozzle, and needle attachment are locked when not listening to any sound, while the current consumptogether by a simple modified form of bayonet catch, which tion is not low. It has been tried on a number of cases and most patients could hear distinctly better with it than without it. The instrument is made by Messrs. F. Davidson and Co., 29, Great Portland-street, London, W.
New Inventions.
good
A NEW PORTABLE OPERATING TABLE.
l out does away with screws, washerp, and other parts easily damaged or lost. The finger-grip can te fixed at any point on the barrel, and there is a screw on the plunger rod which regulates the amount of fluid injected. Unmounted needles are used, and the metal case in which the instrument is packed forms a sterilising tray. The qualities which the manufacturers claim for this syringe-namely, efficiency, durability, stability, and convenience-are well substantiated in actual use.
THE "DAVON" OROPHONE. THIS electrical aid has a different toreto any other at This in itself will make it of value on the market. to cases which can be aided by this class of instrument, as a certain proportion of patients will prefer it to any other design. It will not, however, suit such a wide range of deaf cases as some of the appliances already known to us. With this
present
instrument, after
THIS table, recently made to my design, consists through. of finest seamless steel tubing, except the hinged joints, which are of solid brass, and the ratchets, which are of pressed steel. The table is absolutely rigid, very strong, and weighs a little over 30 lb. It can be unpacked, set out, and repacked in a few seconds. When closed it measures 39 X 21 X 3 in. (Fig. 1), when open it is 71 x 36 x 21 in. can be manu(Fig. 2), but it FIG 1. factured anv less.. heieht tban3ft. <
Theheadlegss
are slanted, base, and suit-
giving a large ing the Trenallied positions ;
delenburg and all the legs are
rubber feet. show the table closed and nrtfnwith the loi3-foot extension dropped, but it can be fixed in any of the positions required in modern surgery. Lithotomy uprights and straps are provided, and an arm ’rest and instrument trays which simply catch on to the side of fitted with solid The illustrations
’
the ear has been educated to it, the suitable
the table are added. The difficulty met with, even in operating theatre tables, of over-extending the arm, as required in dissection of the axilla, has been met by a detachable rotatable bar to which the arm may be attached and held horizontally at any angle. In addition an upright bar can be fitted on to any of the legs, or at any ’point on the upper horizontal bars, on which may be hung a lamp, an infusion apparatus, and so on ; this also carries a candle-socket. All the tube joints are welded and rounded. A, Receiver. B, Transmitter. c, c’, Terminals of the transThe ratchets of the head and foot extensions are detachable mitter into which the connecting plug D is inserted; these terminals are of different size, so that the plug can only be and fitted with special sockets preventing any save intentional inserted in the right manner. D, Connecting plug to transmovements. The table is nickel-plated throughout, but can mitter. E, Connecting plug to battery. be enamelled if preferred. For travelling purposes a canvas bag, or a light tin case, or a wooden case, which becomes to from a will able be distance, up pick speech as, patient a is not loud the instrument the transmitter an instrument table if required, have been provided by the’ one, although diaphragm is not " damped" in any manner. The buzzing makers, Messrs. James Gibbons, of Wolverhampton. C. A. STIDSTON, M.D. Lond. Lomd, present in so many " electrical aids " is abolished in the Wolverhampton.
New Inventions.
good
A NEW PORTABLE OPERATING TABLE.
l out does away with screws, washerp, and other parts easily damaged or lost. The finger-grip can te fixed at any point on the barrel, and there is a screw on the plunger rod which regulates the amount of fluid injected. Unmounted needles are used, and the metal case in which the instrument is packed forms a sterilising tray. The qualities which the manufacturers claim for this syringe-namely, efficiency, durability, stability, and convenience-are well substantiated in actual use.
THE "DAVON" OROPHONE. THIS electrical aid has a different toreto any other at This in itself will make it of value on the market. to cases which can be aided by this class of instrument, as a certain proportion of patients will prefer it to any other design. It will not, however, suit such a wide range of deaf cases as some of the appliances already known to us. With this
present
instrument, after
THIS table, recently made to my design, consists through. of finest seamless steel tubing, except the hinged joints, which are of solid brass, and the ratchets, which are of pressed steel. The table is absolutely rigid, very strong, and weighs a little over 30 lb. It can be unpacked, set out, and repacked in a few seconds. When closed it measures 39 X 21 X 3 in. (Fig. 1), when open it is 71 x 36 x 21 in. can be manu(Fig. 2), but it FIG 1. factured anv less.. heieht tban3ft. <
Theheadlegss
are slanted, base, and suit-
giving a large ing the Trenallied positions ;
delenburg and all the legs are
rubber feet. show the table closed and nrtfnwith the loi3-foot extension dropped, but it can be fixed in any of the positions required in modern surgery. Lithotomy uprights and straps are provided, and an arm ’rest and instrument trays which simply catch on to the side of fitted with solid The illustrations
’
the ear has been educated to it, the suitable
the table are added. The difficulty met with, even in operating theatre tables, of over-extending the arm, as required in dissection of the axilla, has been met by a detachable rotatable bar to which the arm may be attached and held horizontally at any angle. In addition an upright bar can be fitted on to any of the legs, or at any ’point on the upper horizontal bars, on which may be hung a lamp, an infusion apparatus, and so on ; this also carries a candle-socket. All the tube joints are welded and rounded. A, Receiver. B, Transmitter. c, c’, Terminals of the transThe ratchets of the head and foot extensions are detachable mitter into which the connecting plug D is inserted; these terminals are of different size, so that the plug can only be and fitted with special sockets preventing any save intentional inserted in the right manner. D, Connecting plug to transmovements. The table is nickel-plated throughout, but can mitter. E, Connecting plug to battery. be enamelled if preferred. For travelling purposes a canvas bag, or a light tin case, or a wooden case, which becomes to from a will able be distance, up pick speech as, patient a is not loud the instrument the transmitter an instrument table if required, have been provided by the’ one, although diaphragm is not " damped" in any manner. The buzzing makers, Messrs. James Gibbons, of Wolverhampton. C. A. STIDSTON, M.D. Lond. Lomd, present in so many " electrical aids " is abolished in the Wolverhampton.