US847794A

US847794A - Electrical apparatus.

Info

Publication number: US847794A
Application number: US30476406A
Authority: US
Inventors: Charles N Lord
Original assignee: Individual
Current assignee: Individual
Priority date: 1906-03-07
Filing date: 1906-03-07
Publication date: 1907-03-19
Anticipated expiration: 1924-03-19

Description

PATENTED MAR. 19, 1907'.

G.N.LORD. v ELECTRICAL APPARATUS. APPLICATION FILED MAILY, 1906.

' ml um /mrlesil Lord 83% y Wit "eons THE mums PETERS co., WAIHINB'IONn). c.

UNITED ETATIES PATENT OFFICE.

OI'IARLES N. LORD, OF SANTA FE, TERRITORY OF NEW MEXICO.

ELECTRICAL APPARATUS.

Specification of Letters Patent.

Patented March 19, 1907.

Application filed March 7,1906. Serial No. $041,764.

To all whmn it may concern:

Be it known that I, OHARLEs N. LORD, a citizen of the United States, residing at Santa Fe, in the county of Santa Fe and Territory of New Mexico, have invented new and useful Improvements in Electrical Apparatus, of which the following is a specification.

This invention relates to electrical heaters, the object of the invention being to provide a small hand implement adapted for heating dental instruments and the like, the device being especially designed for use in office and laboratory work for enabling a dentist to quickly heat the dental instruments used in his Work.

\Vith the above and other objects in view the invention consists in the novel construction, combination, and arrangement of parts hereinafter more fully described, illustrated, and claimed.

In the accompanying drawings, Figure 1 is a plan view of an electrical heating device embodying the present invention. Fig. 2 is a longitudinal section through the same.

Referring to the drawings, 1 designates a handle or handpiece which is preferably com posed of insulating material, such as hard rubber, and made hollow throughout the major portion of its length to receive a plurality of conductors, two of such conductors being shown at 2 and 3, respectively, passing through and beyond one end of the handle and terminating and being secured in the other end of the handle.

At one end the handle is closed, with the exception of parallel passages 4, in each of which is arranged a terminal-holding socket 5, consisting of a metal tube. These tubes are held fast and permanently in the solid end of the handle, and the extremities of the

conductors

2 and 3 are stripped of their insulation and inserted into the inner ends of the sockets and electrically connected therewith, as shown in Fig. 2.

In the outer ends of the sockets 5 are inserted conductor-terminals 6, composed of carbon or graphite or similar material. The

conductors

2 and 3 are shown as twisted together within the handle 1, and the outer ends thereof may be connected to any suit able source of electrical supply (indicated at 7 either in the form of dry cell-batteries or any electric-light circuit or any source of supply involving an electrical current.

To heat a dental implement or the like, the carbon terminals are placed in contact with such implement, thereby closing and completing the electrical circuit, which thus passes through and heats the implement to the desired temperature, depending upon the length of time the circuit is allowed to pass through the implement.

The terminal-holding sockets 5 consist of metal tubes of any suitable length, the same being insulated from each other by reasonof the fact that they pass through and are embedded in the insulating material of which the handle 1 is composed.

I claim 1. The combination with a source of electrical supply, of an insulating-handle provided with sockets insulated from each other, conductors leading from the source of supply to said sockets, and terminals of graphite or like material inserted in said sockets.

2. The combination with a source of electrical supply, of one or more dry-b attery cells, lead-wires extending therefrom through the handle, metallicsockets in which said leadwires terminate, and carbon or like elements inserted in said metallic sockets and projecting beyond the handle.

3. The combination with a source of electrical supply, of conductors leading therefrom, an insulating-handle in which said conductors are received, metal tubes projecting from the end of the handle and having the conductors electrically associated therewith, and carbon or like elements inserted in said metat ubes and having their extremities projecting therefrom, substantially as described.

In testimony whereof I a'l'lix my signature in presence of two witnesses.

CHARLES N. LORD.

Witnesses:

MYRoN A. FIsKE, DAVID KNAPP.