US750038A - Attemperating device - Google Patents

Description

PATENTED JAN. 19, 1904. M. H. SHOENBERG. f

ATTEMPERATING DEVICE.

APPLICATION FILED MAR. 16. 1903.

N0 IODEL.

x--x-lMlI-X-x UNITED STATES Patented January 19, 1904.

PATENT OFFICE.

ATTENIPERATING DEVICE.

SPECIFICATION forming part of Letters Patent No. 750,038, dated January 19, 1904.

Appncaion fried March 16, 1903.

To all whom. t may concern:

Be it known that I, MILTON H. SHoENB une, a citizen of the United States, residing' in the city and county of San Francisco, State of California, -have invented an Improvement in Attemperating' Devices; and I hereby declare the following to be a full, clear, and exact description of the same.

My invention relates `to improvements in means for heating' air forced under pressure through a tube or nozzle, and pertains particularly to an improved air-blast handpicce for dentists and others. Its object is to provide a simple electrical heating' apparatus whereby air at any pressure or temperature may be instantly obtained by the manipulation of a sing'le combined cock and switch.

It consists of the parts and the construction and combination of parts hereinafter more fully described, having reference to the accompanying drawings, in which- Fig'ure l is a longitudinal central section of dental handpiece, showing my attachment. Fig'. Q is a section of chambered box and tube connection with diagrammatic lamp-circuit. Fig. 3 is an enlarged plan of valve, showing cut-offspring. Fig. 4 is an enlarged transverse section on lines .fc ai, Fig. l, showing' valve open for warm air. Fig. 5 is the same View with valve closed. Fig. 6 is the same view with valve opened for cold air. Fig. 7 is a section-line 4`1/ y, Fig. 4, showing valve open for warm air. Fig. 8 is a similar view with valved closed. Fig. 9 is a similar view with valve opened for cold air.

A represents a block or box inclosing a chamber 2, which communicates with any convenient or usual source of compressed-air su pply. rIhe admission of air to chamber 2 may be controlled by a cock 8. A tube or flexible conductor 4 connects with box A and carries on its outer end the heatingl mechanism by which the airis attemperated immediately before being' discharged from the nozzle. rIhis heating mechanism comprises an insulatorsection 5, longitudinally perforated to one side of its axis to receive a brass plug' 6, which has an air-passage 7 extending' throug'h it. A solid conducting-rodS, insulated from plug' 6, also extends lengthwise through section 5 serai No. 148,037. No modell) and has its ends projecting' beyond the section to allowof the necessary connections being' made with it. The ends of section 5 are threaded, one to receive the union on the end of tube 4 and the other to receive the discharge-nozzle 9. The latter is suitably chambered to inclose a resistance-coil l0, which has one end connected with plug' 6 and the other with rod 8. By connecting' up the plug' and rod with a suitable source of electrical energy and sending a current of air throughthe tube-plug'.

and nozzle a hot-air blast will be obtained at the nozzle.

The means of effecting' electrical connection between the .rheostat IO and a source of energy and the means of controlling the current and the air-supply may be effected in a variety of ways. In the present instance I have shown the box A, carrying two binding-posts ll l2 in an ordinary incandescentlamp circuit. Post 1l is connected through tube 4L with plug' 6 by means of an insulated wire 13. Post l2 is insulated from box A and connects in like manner with rod 8 through wire I4. The current thus in its course through the lamps passes through posts Il, wire 13, plug' 6, rheostat l0, rod 8, wire I4, plug l2 to the lamp-circuit again. As there is no necessity of the rheostat being in circuit when the air-supply is shut off and as there may be times when cold instead of heated air is desired, I have devised a simple form of combined switch and stopcock whereby the air-supply through the nozzle may be controlled and the current passing' through wires 13 la short-circuited to avoid the rheostat either when the air-supply is turned on or oli'. Accordingly I use a plugvalve 15, of brass or other good electrical conducting material, passing' transversely through section 5 and plug 6 and turnable in the manner of other plug-valves to reg'ulate the air-How tln'oug'h passage 7. The part of the valve, however, seated in the section above plug' 6 has a transverse notch 16 nearly severing the valve. valve-opening in the section, is accommodated in this notch in such fashion that when the valve is turned to cut off the air the rod 8, valve, and plug' 6 may be in electrical connection and cutout the rheostat, and when the Rod 8, which traverses the 9 IOO valve is opened a certain distance the connection between the rod and valve will be broken and the full current will pass through the rheostat to heat the'air as desired, and when the valve is turned still farther in the same direction the valve will be brought again into electrical connection with the rod to cut out the rheostat, but not so as to cut oi the air,where by a cold blast will be discharged from the nozzle. Hence it is that the valve is a combined hot and cold air controller and switch. There is no danger of the rheostat burning out, since the Huid-blast keeps it cool. A spring l5 acts to close the valve automatically as soon as it is let go by the operator.

This heating and air controlling apparatus is applicable wherever an attemperated fluidblast is desired. 1t has been here shown as applied to a dental handpiece, in which connection it has been used with marked success.

Having thus described my invention, what I claim, and desire to secure by Letters Patent,

l. The combination of a suitable support interposable in a fluid-conduit; a rheostat carried by said support; and connections including a conducting-plug parallel with the support and having a huid-passage through it, and a solid conductor parallel with the said perforated plug said rheostat in electrical connection with the conductor and plug.

2. The combination of opposing unions forming a part of a fluid-conduit; a section having projecting ends to engage said unions said section perforated to one side of its axis; a conducting-plugfitting said perforations and having a longitudinally-extending fluid-passage; a conductor Vmounted in the section parallel with the plug and having its ends projecting' beyond the section; a rheostat located in a chamber beyond the section and electrical connections between the same and the conductor and plug; and means for cutting off the fluid-passage in the plug' and short-circuiting the electric current.

3. The combination of opposing unions forming a part of a fluid-conduit; a couplingsection having projecting ends to engage the unions said section perforated to one side of its axis; a conducting-plug in said perfora- 5o tion and having a longitudinal Huid-passage;

a conductor in the section parallel with the plug and electrical connections between the rheostat and the conductor and plug', one of said unions having a chamber to contain the rheostat; and a plug disposed at right angles to the plug and conductor and traversing the fluid-passage in the plug, and provided with a port to register with said passage, said plug turnably mounted and provided with a re-` cessed side to receive the conductor to maintain the turning plug out of contact with the conductor in one position and to contact with the plug to short-circuit the current when the plug is turned into position to cut off the iiuid passage.

4. A iiuid-attemperating apparatus comprising a receiving-chamber connected with a source of Huid-supply, a discharge-conduit from said chamber, a discharge-nozzle, an in- 7o sulator-section interposed between the conduit and nozzle, said section having a metallic cere provided with an air passage-way, a cock controlling the iow through said 1' assage-way, an electrical conductor carried by said insulator, 7 5 a resistance-eoil having one terminal connect ed with said core and the other with said conductor and extending into the nozzle-chamber, connections of the opposite ends of said conductor and core through said cond uit with a 8O source of electrical energy, and switch mechanism by which the conductor and core are brought into electrical connection to cut out the resistance-coil.

In witness whereof 1 have hereunto set my 8 5 hand.

MILTON H. SHOENBERG. Vitnesses:

S. H. NoURsn, Jsssna C. BnoDnc.

Images