US1857178A - Electrical fitting and method of making the same - Google Patents

Description

May 10, 1932. a. a. BENANDER ELECTRICAL FITTING AND METHOD OF IAKING THE SAME Filed lay 23. 1929 1 fieorqe D. Benander i; ATTORNEY Patented May 10, 1232 UN'TED S E PATENT OFFICE oneness. IBENANDER, or ranasmu come-Hour, aasreiroa, a! infirm nearer nEN'rs, 'ro rnsxoiwowarr nacram coaroaarron, or aamenroar, common- I CUT, A. CORPORATION OF CONNECTICUT Emcrmcn. rrrrme m rm'rnon orfnxme m am Application fled Kay 28, 1989. Serial No. 8653354.

The present invention relates to electrical fittings and is more particularly directed toward electrical fittings such as-plural lamp sockets and current taps adapted to. be threaded into an electrical outlet and having one or more outlets for lamp sockets.

The present invention more particularly relates to electrical fittings such as plural lamp sockets and current. taps having insulating casings consisting of two casing halves of moldable material molded together and adapted to support the conducting parts.

The present invention contemplates an arrangement of parts whereby a conductor strip connected to one of the output terminals such as a lamp socket terminal, carried inside a chamberwithin the casing halves is passed outwardly through registering notches in the casing halves to be bent against the side faces of the casing and be in. a position to be engageable with a male screw shell forming one of the current supply terminals.

A further object of the present invention is to provide a screw shell terminal and conductor strip suitable for'the above purpose all made out of a single piece of sheet metal. In some cases this strip may be rovided by suitably slitting the base of the b ank for the shell contact to form a strip connected thereto at one end, bending it back and forming it to shape to be received in the notches. In other cases, however, the strip so formed is of insufiicient length and the present invention contemplates the obtaining of a strip of longer effective length by slitting out a tongue from the body of a strip, this tongue being adapted to be passed through the notches in the casing halves.

- A further object of the invention is to provide an improved device to anchor the shell contacts in the casing halves and prevent rotation of the shell contacts.

A further object of the invention is to provide a plural lamp socket wherein a single bent strip ofv sheet metal provides a center contact for the input end of the plural lamp socket as well as the center contacts for the two outlets, this single conductor strip being secured in place in suitably formed notches and abutments in the insulating casing halves.

The accompanying drawings show, for purposes, of illustrating the present, invention, several of the many embodiments in which it may take form, it being understood that the drawings are illustrative of the invention rather than limiting the 'same.

In thesedrawingsf Figure 1 is an elevational view of one of the casing halves of a plural lamp socket, showmg one of the screw shell contacts and the istrip forming the center contacts in posiion; v

Figure 2 is an elevational view of a plural lamp socket of Figure 1, parts being broken away to show interior construction;

Figure 3 is a sectional view taken on the line 33 of Fi re 2;

Figures 4 an b are top plan and sectional views, respectively, of a blank for a screw shell contact partly formed;

Figure 6 is a side elevational view of a screw shell contact taken at right angles to the direction shown in Figures 1 and 5; Figure 7 is an elevational view with parts 111 section of a modified form of plural lamp socket of the type provided with the side outlets for attachment plugs;

Figure 8 is a view similar to Figure 1 showing a current tap; and

Figure 9 is a perspective view showing one of the terminal assemblies for the current tap of Figure 8. 7 v

The form' of plural lamp socket shown in Figures 1 to 6, inclusive, is made up of a pair of identical casing halves 10 and 11, of molded insulating material, a pain/bf screw shell socket contact units 12 and 13, a. center contact forming strip 14, male screw shell 15, and securing means indicated at 16.

The casing halves are provided with upwardly extending tip forming portions 20 and with two downwardly diverging socket shell receiving openings or chambers 21 and 22. The tip portion of each of the casin halvesis provided with a centrall dispos notch 23 while the side walls of t e tips are provided with laterally extending notches 24 and 25. As shown in the drawings, the

' below the notches 24 and 25, with partitions identical and the faces of the various 'ada ted to lead current to the shells.

orfwebs 26, 26. These partitions or webs are notched. centrally as indicated at 27and strip 46-l1es 1n the registe arespaced from the side walls of the halves as indicated at 28. The socket sh receiving chambers are closed at their upper ends b end walls indicated at 29, these end walls 'ng notched asindicated at 80 and 31. -Near the outer end of the chambers 22, the casing halves are provided with peripheral grooves '82. These grooves are not continuous, there be' ing to the preferred form ofconstruction as;

a above referred to is in a single central p ne. The center contact forming strip 14 is made out of a single piece of sheet metal doubled'on itself to the shape indicated in Figure 1. This contact forming strip has an arcuate central portion 35 adapted to beenried beyond the tip downwardl' and inwardly convergent portions 35a a a ted to fit the convergent walls .36 of the note es '23 in the casing halves. The sides of the terminal member 14-are shouldered as. indicated at 37 andthen conver together to pass through'the notch 27 in t e partitions or webs 26. The member then diver s and passes through the notches 31 as indicated at 38. The lower ends or feet 39 v of this conductor strip arecarried inside the chambers 21 and 22 and are spaced slightly member 14' is made out of resilient sheet metal and is readily insertible into place in the notches. 1

The screw shell contact units 12 and 13 are identical and are shown in detail in Figures 1,34, 5 and,.6. These contact units have, as

ove intimated, an integral conductor s trrip he com ined screw shell contact and conductor strip are madeas follows: A screw shell -bl'ank is formed in the usual manner with threaded-side walls 40 and with a bottom portion 41. The material in thisbottom portion is utilized to form the strip and according to the preferred form of construction, the bottom portion of the blank is cut to form a trans-.

' verse stri as indicated at 44, this strip being slitte as shown at 42, to form a tongue The tongue is bent back into the plane the bottom. Prior to inserting the contact unit in the casing, the tongue 43 is bent as indicated in Figure 5 and the strip 44 is an 4 interruptim indi-- 1 'cated at 83. The two casing halves accord ofthe fitting and with s a... through the registering notches parts iny. flared as indicated at 47 and this outwardly flared portion is notched as indicated at 48. This notch may be cut-by the dies at the same time as the other operations are performed. When the shell is in place the flange 47 is received in the grooves 32 and a notch .48 aocomodates the ungrooved portion 33- of the insulating casing.

- From Figure 1 it will be apparent that thescrew shell conductor strip umt ma be easily inserted into the casing half and a ton es 43 pass ed out through the notches 24 an 25 so as to provideextemal terminals for the output contacts. .After the screw shell contacts and center contact strip have'been insorted in one of the casi halves, the other casin half is a plied to 1t, the parts fitting toget er, and t e casing halves'secured together bythebolt indicated at-16. V

The male screw shell 15 for the device is then slip v on as indicated. This screw shell is o ordinary construction and passes down about the ti of the fitting sliding over the ton es '43. o facilitate soldering the screw s ell of the-tongues, the 'screw shell is provided with small holes indicated at 51 and a drop of'solder is applied, as shown in F1 ure 2. In order that the screw shell-may attached more securely, the casing halves are provided with recesses indicated at 52 and the material of the screw shell is pressed into 3 these recesses.

The four way plural lamp socket indicated in Figure 7 has a wider angle between the lamp sockets, and hence it is possible for the socket contact indicated at to be closer to I the male screw shell 61 than in the type of construction shown in Figuresl and 2. The blank from which the screw shell 60 is formed ma provide sufficient material to allow for ma 'ng an integral conductor strip 63 of sufficient length to ass through notches indicated at 64. It tlien lies alongside the side wall of the casing where it may be secured to the outer screw shell 65 in the manner above described. In each of these forms of construction, it will be noted thatthe conductor strip (44 or 63) passes upwardly between the casing halves until it reaches the registering notches which are inside the male screw shell, thereby making it certain that when in use no con- (lllllcltling parts are exposed beyond the screw s e I Figure 8 shows a current tap having the usual plug contacts 71 and 72 whereby it may be threaded into a lamp socket. This current tap also has-a socket outlet, the screw shell Ill of which is indicated at 73, and a center contact 74. It is provided with pairs of blade receiving contacts indicated at 75 and 76. These conducting parts, except for the external screw shell 71 are carried inside of casing halves indicated at 77, these being provided with notches, recesses and openings to accommodate the various parts.

The screw shell 73 is anchored in place in the socket chamber in the same manner as the screw shells 12- and 13. Corresponding parts are indicated by the same reference characters. In this current tap, the connection between the screw shell 71 and the socket shell 73 is in the form of a conductor strip 79 riveted to an extension 80 formed integral with the socket shell. These parts are also riveted to a cross conductor strip 81 which provides the blade receiving contacts 75. The upper end of the conducting strip is bent as indicated at 82 to pass through suitable notches in the casing halves and is preferably secured to the outer screw shell 71 in the manner above described. The conductor assembly for the other side of the circuit includes a strip indicated at 83 whose upper end is formed to fit notches in the tip of the fitting. The lower end of the strip 83 forms the center contact 74, and the strip is riveted to a cross strip forming the blade ieceiving contact 76, similar to that shown in It is obvious that the invention may be embodied in many forms and constructions, and I wish it to be understood that the particular forms shown are but a few of the many forms. Various modifications and changes being possible, I do not limit myself in an way with respect thereto.

1. A combined screw shell contact and terminal strip for lamp sockets comprisin a single piece of sheet metal having a threaded screw shell portion, a rearwardly extending strip, and a tongue out from the strip.

2. Acombined screw shell contact and terminal strip for lamp sockets comprising a single piece of sheet metal havin a threa ed screw shell portion outwardly ared at one end and havlng a rearwardly extending strip at the other end provided with a tongue out from the strip.

3. The method of making a lamp socket shell with an integral conductor strip havin longer eflective length than the diameter 0 the shell, which consists in severin a strip from the base of the shell blank, an cutting a tongue from said strip near the free end thereof. a r

4. The method of making a combined screw shell contact and terminal strip for lamp sockets, which consists in forming a cupshaped threaded stamping of sheet metal, cuttmg away material from the base of the stamping to have a strip connected at one end to the threaded shell and slitting said strip nearthe free end of the strip to form a tongue. 1

5. The method of making a combined screw shell contact and terminal strip for lamp sockets, which consists in forming a single piece of sheet metal into a screw shell with a terminal strip connected to the shell and extending away from the shell body, and slitting said strip near the free end of the strip to form aton ue.

6. The methodo makinga combined screw shell contactv and terminal strip for lamp sockets, which consists in forming a cupshaped threaded stamping of sheet metal, cuttin a strip from the bottom of said cupshape stamping of sheet metal, and slitting the free end of the strip to form a tongue.

Signed at New York, in the county of New York and State of New York, this 10th day of May, 1929.

GEORGE B. BENANDER.

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