USRE12099E - Lamp-socket - Google Patents

Description

RBISSUBD MAR. 10, 1903. n. A. SCHUTT. LAMP SOCKET.

APPLIGA'TXQN FILED JAllI. 23. l9Q2 is a specification, reference of this specification.

UNITED STATES 'DUNY A. SCIIU'IT, OF PERU, INDIANA.

LAM P-SOCKET.

SPECIFICATION forming part of Reissued Letters Patent Original No. 681.268, amt August 27 1901.

No. 12,099, dated March 10, 1903.

Application for reissue filed January 23, 190Z. Serial No. 90.998.

1 all whom. it may concern:

Be it known that I, DUNY A. ScuU'rr, a citizen of the United States, residing in Peru, county of Miami, and State of Indiana, have invented certain new and useful Improvements in Lamp-Sockets, of which the following being had therein to the accompanying drawings, forming part My invention relates to sockets for incandescent lamps,cither key or keyless; and it consists of the novel construction, arrangement, and operation of the various parts, as I shall now proceed to describe.

The principal object of the invention is to provide a socket which will be in itself a perfeet insulation with all working parts so arranged that the regulationrequirements in break distance are complied with and the workingparts and mechanism are so arranged thatit will open or close circuit quickly, while still having in all parts the required metallic bodies to give the best results or higher voltage.

A further object of the invention is to incorporate the base members with the cap and shell in a simple and efficient manner, by which short-circuiting through these parts is prevented, while the cap is also provided with an internal fiber washer or cap lining by which the entire upper cavity in which the terminal connections are made is thoroughly protected and insulated from the cap.

Figure l. is a perspective view of my improved socket. Fig. 2 is a plan view of the top of the upper portion of the socket, the cap being removed. Fig. 3 is a vertical section through theupper and lower portions of the socket assembled, indicated by the line III III of Fig. 2, the case beingremoved. Fig. 4 is a plan view of the lower portion of the socket, the partition-line being indicated at IV IV of Fig. 3. Fig. 5 is a vertical section taken through the entire socket on the line V V of Fig. 1. Fig. 6 is a perspective detail .view of the outside connecting-ring with metallic con: ductor. Fig. 7 is a detail perspective view showing the key, yoke, tumbler-spring, and center contact-post assembled. Fig. 8 is a detail perspective view of the upper contactspring detached. Fig. 9 shows in perspective three views of socket members.

Fig. 10 is a side elevation of the key detached, showing a modified construction. Fig. 11 is a vertical section similar to Fig. 5, but illustrating certain modificationsin construction. Fig. 12 is a plan view of the lower portion of the socket of Fig. 11, the partition-line indicated at XII XII. Fig. 13 is a plan view of the top of the upper portion of the socket of Fig. 11, the case being removed. Fig. 14 is an under plan view of the upper portion of the socket of Fig. 11. Fig. 15 is a detail perspective view of the fiber lining of the cap, showing how the same is fastened to the cap. Fig. 16 is a sectional detail view through a portion of each member of the socket-base at the side, showing the manner in which the shell and cap are held together and to the base members. Fig. 17 is a perspective detail view of the retaining piece or nut inserted in the slotted openings in the socket members and by which the telescoping ends of the inclosing cap and shell are held together and to the Fig. 18 is a perspective detail view of the terminal member and the contacting devices. I

Referring now to the drawings, the body portion of the socket is composed of upper and lower base members 2 3, of porcelain or gether with members, tapping into the outside connecting-ring 5 and holding it in position. This ring is connected with an upwardly-projecting terminal branch 6, which may be a flat bar, screw, or rod which passes through both .members of the socket, and to the top of which by screw 7 one of the terminal wires 8 is connected. The other terminal wire 9 is counected in a similar manner to an arm of contact spring or piece 10, which spring is held in the under side of the upper base member '2 by screw 11. It willbe noted that both of these terminal members, to which the hot wires are connected,

thereby obviating any danger of short circuit from strands in lamp-cord, &c. The center contact-post 12is made of a square bar, the upper end of which fits into a corresponding socket in the underside of the the tumbler detached.

porcelain, while the projecting portion is being other suitable insulating material, held toscrews 4 4, passing through both- 14, by either turned down and threaded or left plain, as desired, forinsertiou in the lamp-base. This post is drilled centrally, and a screw passes up through the post, porcelain, and into the spring 14 or intoa yoke 15, which by the screw is clamped tightly down against the spring of which means electrical connection is established with the post12. The spring is turned around over itselfiand forms a good bearing for the whole face of the tumbler 16, mounted on the key-stem 17. The stem, which is of the usual construction, is mounted in bearings 18, formed in the meeting faces of the base members 2 3,which bearings are made sufficiently accurate to maintain the stem in alinement independent of any auxiliary hearing; but in case it is desired the sides of the yoke 15 may be provided with elongated slots, which will permit of a degree of automatic adjustment when the tumbler is turned.

I prefer the construction shown in Figs. 11, 12, and 18, for the reason that it is simpler, the break distance is increased, and it is more reliable in operation and avoids the danger of short circuits. r

The stem is provided with a thumb-piece 18', and connection with the tumbler may be made by a pin 19, passing through the stem between the sides 20 of the tumbler, thus incaring a turning action, or, as in Fig. 10, I have shown a modified construction of the key-stem, which aiiords a good connection with the tumbler'and is a cheap, strong, and durable arrangement. In this formthe stem is stamped or pressed, so as to form two ears or small lugs 21 on the sides, forming, in effect, flanges projecting from the sides of the stem, adapted to enter the s ace between the sides 20 of the tumbler and to engage it in the manner of the pin already described. As thus constructed it will be seen that contact will be made with spring 10 by turning the stem, when the flat ends of the tumbler will come into contact with the flat springs 10 and 14, establishing a good electrical contact and resting firmly in position, either in a make or break position. It will be seen also that the stem 17 is entirely surrounded and inclosed by the insulating material of the socket-bases, upper and lower, so that any danger of. short circuit with the outer shell or any other metallic substance apt-to occur in sockets where the working parts are open is prevented. It is to be noted that the insulated thumb-piece 18 projects into the sides of the base, thus further protecting the stem from contact.

The outer shell is attached together and .to the base-cap by screws 22, which pass through slotted bayonet-jointed openings 2 in the cap and shell and are tapped onto elongated fiatretainingmnts 24, which are fitted into-sockets 25 in the lower and'upper base members, the provided "h a slotted opening 26 for pasllgeuf the screw 23. Good results may-be base and provide a strong,

has with the cap socket in the upper base being-v had by making the socket and slot in the upper base only, and it will be seen that as thus constructed the screw and nut form a T-shaped holding-anchor which has a firm holding bearing in the correspondingv T- shaped socket in the base member. In this manner these metallic holding devices are situated remote from the interior working parts. They are embedded in the insulatingple means for connecting the parts together. By loosening the screw the cap and shellmay be removed, while the screw and its nut are retained in position against accidental dislodgmeut or loss, and this feature will be found to be of great advantage and value in devices of this class, as it entirely avoids the necessity .of supplemental insulating mediums, as inner linings, &c. Where the shell embraces the base of thelamp, I insert a fiber lining 26, which effectually insulates the metal shell from the base, the lining fitting up around the socket-base and conforming to the internal retaining-groove of the shell in the manner shown. A further protection is provided in the up; it cavity by means of a fiber cap and up around the under surface of the cap and securely held in place by means of tongues 28 of ring 29,which,

tongues are passed through the fiber lining and turnedup against it, thus securely holding it in position. The ring 29 isfirmly incorporated iii the inner side of the socket, as clearly shown in Figs. 5 and 11.

The advantages of my invention will be appreciated by those skilled in the art. All danger of short-circniting .is prevented by reason of all of the metal working parts being entirely inclosed in the interior 'of the insulating-bases, which are hollowed out to pro'-' vide fortheir location and operation. The terminals are so constructed as to give good contact-surface. They are remote fromeach other and are embedded deeply in the porcelain. The faces of the tumbler and of the contact-springs are broad and flat, insuring good contact, embedded in strongly united to the spring,

the lower side of the base and suits.

The manner of and shell and of the'fiber lining with the interior face of the cap is a new and useful feature of my invention,which will be appreciated, while the internal fiber lining of the 'shell insures against short-circuiting at the base of the lamp.

The device is very simple, cheap, and easy ,to construct and very durable and efiicientin operation and has many features of superiority over the general class of lam p-sockets now in use which will commend it to the users of this class of goods.

Having described my claim isinvention, what I 1. in slumpsocket, the combination ofupreliable, and simwhile the center post is firmly so as to insure the best possible mechanical and electrical reconnecting 'the base mem in the bases, a threaded center post havinga base inserted in the lower side of the lower base, a connecting-screw passing centrally through the center post and base into a contac t-spring,acontact-spring so connected and in electrical connection with the screw, an upper contact provided with aconnecting-terminal embedded in the upper base, and a turning stem and tumbler mounted in bearing-recesses formed in the mee tingface's ofthe base members and adaptedto establish electrical communication between the upper terminal and the contact-springsubstani ially as set forth.

2. In alamp-socketghe combination of upper and lower base members of insulating materiaha contacting ring on the lowerbase'provided with acurrent-terminal embedded in the bases, athreaded center post havinga base inserted in the lower side of the lower base, a connecting-screw passing centrally through the centerpost and base into a contact-spring, acontact-spring so connected and in electrical connection with the screw, an upper contact provided with a connecting terminal embedded in the upper base, a turning stem and tumbler mounted in bearingrecesses formed in the meeting faces of the base members and adapted to establish electrical communication between the upper terminal and the contact-spring, and connecting screws passing through both base members into the contacting ring and holding the parts together, subetantially as set fbrth.

' ing through the 3. In a lamp-socket, the combination of a base member of insulating material, a threaded center post having one end inserted in the lower side of the base member, a screw passecnter post and base memher, and a contact-spring electrically connected to the screw; substantially as described.

4. Ida lamp-socket, provided with one or more base members of insulating material provided with sockets having screw-slots and surrounding overlapping shellsy a holding device for the shells consisting of an elongated fiat retaining-nut adapted to be inserted in the socket in the base, and a screw passing through bayonet joint openings in the shell and through the slot, and tapped into the retaining-nut, whereby the shells and bases are firm y connected, substantially as set forth.

In a lampsocket, the combination of an upper base member of insulating material provided with oppositely-disposed vertical sockets on the sides having lateral screw-slots of less width, a lower base member of insulating material, surrounding overapping shells provided with bayonet-joint openings, flat retainingnuts mounted. in the sockets, and securing screws passing through the shell and slots and tapped into the retaining nuts, substantially as set forth.

6. In a lamp-socket, the combination of an upper base member, of insulatingmaterial provided with oppositely-disposed vertical sockets in the sides having lateral screw-slots of less width, 9. lower base member of insulating material provided with corresponding oppositely -disposed closed vertical sockets adapted to form extensions of the upper socket, surrounding overlapping shells provided with bayonet-joint openings, flat retainiugnuts mounted in the sockets, and securing-screws passing through the shells and slot and tapped intothe retaining-nuts, substantially as set forth.

7. In a lamp-socket, the combination of upper and lower base members of insulating material, a contacting ring on the lower base provided with a current-terminal embedded in the bases, athreaded center post having a square base inserted in the lower side of the lower base, a' connecting-screw passing centrally through the center post and base into a con tact-spring, a contact-spring so connected and in electrical connection with the screw, an upper contact provided with a connectingterminal embedded-in the upper base,

a turning stem and tumbler mounted in bearbig-recesses formed in the meeting faces of the base members and adapted to establish electrical communication between the upper terminal and the contact-spring, surrounding upper and lower overlapping shells, holding devices for the shells consisting of elongated fiat retaining-nuts adapted to be inserted in sockets in the base members, and screws passing through bayonet-joint openings in the shells and tapped into the retaining-nuts, substantially as set forth.

8. In a lamp-socket, the combination of upper and lower base members of insulating ma terial, a'contacting ring on the lower base provided with a current-terminal, embedded in the bases, a threaded center post havinga square base inserted in the lower side of the anupper contact provided with it connecting-terminal embedded in the upper base, a

turning stem and tumbler mounted in bearing-recesses formed in the meeting faces of the base members and adapted to establish electrical communication between the upper terminal and thecontact-s ring, surrounding upper and lower overlappi g shells, an inter nal insulating lining for the uppershell consisting of a cap-shaped disk of fiber conforming to the inner surfaces of the shell and held therein by retaining-lugs passing through the fiber and bent over, holding devices for the shell consisting of elongated flat retainingnnts adapted to be inserted in sockets in the base members, and screws passing through bayonetj oi nt openings in the shell and tapped into-the retaining-nuts, substantially as set fort-l...

9., In alam p-socket, the combination of lippersnd lower base members of insulating material, a contacting ring in the lower base rovided with a current-terminal embedded n the, bases, a threaded center post having a square base inserted in the lower side of the lower. base, a connecting-screw passing centrally through the center post and base into a contact-spring, a contact-spring so connected and in electrical connection with the screw,

therein by retaining-lugs passing through the fiber and bent over, an inner lining for the lower shell ofinsulating material, holding devices for the shell consisting of elongated fiat retaining-n u ts adapted to be inserted in sock ets in the base members, and screws passing through bayonet-joint'openings in the shells and tapped into retaining-nuts, substantially as set forth. v Y I 10. i In a lamp-socket of the class described an internal insulating-lining for the cap consisting of a cap-shaped disk of fiber conforming to the inner surface of the cap and holding-lugs passing through the fiber and bent over, substantially as set forth. In testimony whereof I aflix my signature in the presence of two witnesses.

DUN Y A. SCHUTT. Witnesses:

WM. B; MCCLINTIC, DAVID IRWIN.

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