US 3812450 A
Description (OCR text may contain errors)
United States Patent [191 Simovits, Jr. et a1.
[451 May 21, 1974 1 1 RELAY SOCKET  Inventors: Stephen S, Simovits,Jr., Woodridge; Christ ,1. Dumas, Forest View, both of 111.
 Assignee: American Plasticraft, Chicago, 111.
 Filed: Apr. 3, 1972  Appl. No.: 240,666
 US. Cl 339/128, 174/153 G, 248/27  Int. Cl. 1102b l/02  Field of Search 339/128, 126, 59, 62; 200/168 C; 174/153 G; 292/D1G. 38; 248/27;
24/73 SM, 73 SB, 73 PP  References Cited UNITED STATES PATENTS 3,012,159 12/1961 Drusedow 339/126 RS 2,946,612 7/1960 Ahlgren 292/D1G. 38 3,289,145 11/1966 Ruehlemann 174/153 G UX 3,057,001 10/1962 Rapata 339/128 X 3,573,716 4/1971 Garuer 339/128 Primary Examiner-Henry C. Sutherland Assistant Examiner-William F. Pate, I11
[5 7] ABSTRACT A socket for a plug-in type of relay, which socket is formed of an insulative material and may be mounted from the front or from the rear side of a relay mounting panel.
4 Claims, 8 Drawing Figures RELAY SOCKET BACKGROUND OF THE INVENTION Relay sockets for mounting on electrical panels are known in the art. Such sockets are usually made of an insulating material and arranged to be mounted either by suitable screws, locking lugs or clamps onto the panels.
The prior art relay sockets are generally quite satisfactory; however, such prior art relay sockets have the limitation that the socket can only be mounted from one or the other side of the panel. Hence, for example, a technician working on one side of a large panel may want to mount a socket on the panel; however, the socket may be mountable only from the other side of the panel. Hence, the technician may have to move to the other side of the panel, mount the socket in position, and then return to the first side of the panel to complete his work.
Thus, it is often inconvenient for such prior art sockets to be mounted on their respective panels because of the aforementioned fact that the socket can be mounted onto the panel only from one side of the panel.
Accordingly, it is a peripheral object of the present invention to provide a snap socket for a relay which may be mounted on an associated panel from either side of the panel.
It is another object of the present invention to provide a socket having good dielectric spacing between the conductors.
The foregoing and other features and advantages of the invention will be apparent from the following more particular description of a preferred embodiment, as illustrated in the accompanying drawings wherein:
FIG. 1 is an isometric view of a relay socket in accordance with the invention showing the socket mounted in an associated panel;
FIG. 2 is a top view of the socket of FIG. 1 without the terminal pins to thus better show the construction of the socket;
FIG. 3 is a bottom view of the socket, as in FIG. 2;
FIG. 4 is a front view of the socket, as in FIG. 2;
FIG. S'is a back view of the socket as in FIG. 2;
FIG. 6 is a side view partly in section showing a side view of the socket of FIG. 1 in its mounted position;
FIG. 7 is a side view partly in section showing the socket of FIG. 1 being mounted from the top side of the panel; and,
FIG. 8 is a side view partly in section showing the socket of FIG. 1 being mounted from the bottom side of the panel.
DESCRIPTION OF THE INVENTION Referring to FIG. 1, the socket 11 of the invention is shown mounted in position in an opening 14 in an associated panel 12. As indicated in FIG. 1, other openings generally labeled as 14 are formed in the panel and are adapted to receive sockets identical to socket 11.
Referring now to FIGS. 2-5, as well as FIG. 1, socket 11 comprises an essentially rectangular body portion 13 formed of an insulative material, such as polypropylene.
Pin aperture or receptacles, generally labeled l5 and 15A, are formed to extend through the body portion 13, see FIG. 2, for receiving the associated terminal pins 17 which are inserted in the apertures 15 and 15A and locked in position as is known in the art.
As is known, the top portion of the pins 17 are bifurcated to receive the male contact pins or terminals of the associated relay, not shown. A suitable key way 18 is provided to assure that the associated relay is properly positioned in relay socket 11.
FIG. 3 shows a bottom view of socket 11 with the terminal pins removed, as in FIG. 2, to more clearly show the construction of the bottom side of the socket. The bottom surface of socket 11 includes strengthening and insulating ridges 19 extending transverse to apertures 15A. The rather wide apertures 15 on the top side of socket 11 reduce in size to narrower apertures 15A on the bottom side of socket 11.
A basic advantage of the relay socket ll of the invention is the structure which enables the socket to be mounted and positioned from either side of an associated panel.
For this purpose, snap-in flexible lugs 21, 22 and 23 are formed on one, say the front side, of the socket ll. Lugs 22 and 23 are formed on the top surface edge of the socket body 13 and extend downwardly and outwardly at an acute angle. The lug 21 is formed at the bottom surface edge of the socket body 13 and extends upwardly and outwardly.
The lugs 22 and 23 straddle lug 21 and a horizontal spacing 32 is formed between the bottom edge of lug 21 and the top edge of lugs 22 and 23, see FIG. 4.
The edges 29, 31 and 37 of the lugs 21, 22 and 23 are cut essentially on a horizontal line (as oriented in FIG. 1), to accomodate and fit snugly, against the top and bottom horizontal surfaces of the panel 12.
The back side of the socket, as shown in FIG. 5, includes mounting or panel engaging shoulders 41, 45 and 49. The mounting shoulders 41 and 45 are formed adjacent the upper surface of socket body 13 and straddle the lower shoulder 49 formed adjacent the bottom surface of the socket, see also FIG. 6. A horizontal spacing 44 is formed between the bottom edge of the shoulders 41 and 45 and the top edge of shoulder 49.
The bottom edges 43 and 47 of shoulders 41 and 45 are beveled upwardly and outwardly; and, the upper edge 51 of shoulder 49 is beveled downwardly and outwardly to facilitate guiding the socket 11 into its associated opening 14 and properly forcing socket 11 into position.
The socket 11 includes a pair of forwardly extending angled flanges or guides 25 and 26 formed on either forward side of the socket 11 body portion, see FIGS. 2 and 4. Flanges 25 and 26 are each tapered toward a reduced front vertical edge 27 and 30 respectively. Edges 27 and 30 provide the abutting edges which force and abut against the edge of the opening 14 to secure the socket in position. Flanges 25 and 26 also protect the lugs 21, 22 and 23 from damage as will be explained hereinbelow.
As mentioned above, a basic feature of the invention is that socket 11 can be pushed into its mounted position as shown in FIG. 6, from either the top of the panel 12 as indicated by the arrow in FIG. 7, or from the bottom of the panel as indicated by the arrow 62 in FIG. 8.
As shown in FIG. 7, to insert the socket 11 from the top of the panel 12, the horizontal spacing or recess 44 between the upper shoulders 41, 45 and lower shoulder 49 is inserted in opening 14 agaipst the edge of panel 12, and snugged against the edge of the panel opening. The beveled edges 43, 47 and 51 facilitate the correct positioning of the socket 11 in its opening 14. Next, the socket 11 is pushed down as indicated by the arrow 60,
and the oposite edge, the left hand edge as oriented in- FIG. 7, of the panel 12, engages the lug 21 and pushes or forces lug 21 inwardly.
Lug 21 is pushed inwardly until the edge of panel 12 engages the angled edges of flanges and 26, which thus limits the flexing of the lug 21.
As the socket 11 continues to be pushed downwardly, the upper edge or surface of lug 21 moves past the bottom surface of panel 12, and the flexed or spring tension of the lug 21 causes the lug 21 to move outwardly whereby the top surface of lug 21 engages the bottom surface of the panel 12.
The horizontal spacing 32 formed between the upper edge of lug 21 and the lower edges of lugs 22 and 23 is dimensioned to be slightly less than the thickness of the panel 12. Thus, when the socket 11 is in position, the lugs 22 and 23 flex outwardly, see FIG. 6, and the flat surfaces 29 and 31 of lugs 22 and 23 engage the upper surface of panel 12, and the flat surface 37 of lug 21 engages the lower surface of panel 12.
Thus, since lugs 21, 22 and 23 are flexible or resilient, since the horizontal spacing 32 is made slightly less than the thickness of the panel 12, a spring like tension will exist to hold the socket 11 securelyin po'sition.
FIG. 8 shows the insertion or mounting of. the socket 11 into its associated opening from the bottom or reverse side of the panel 12. In this case, the upper lugs 22 and 23 are initially flexed inwardly to the angle edges of the flanges 25 and 26. As As the lower surface of lugs 22 and 23 moves past the upper surface of panel 12, the lugs 22 and 23 will snap outwardly and lockthe socket 11 into the position. As mentioned, lugs 21, 22 and 23 are flexible and resilient, and the horizontal spacing 32 between the lugs is smaller than the thickness of panel 12, hence, the lugs will hold the socket 11 securely in position in panel 12.
' The relay socket of the invention provides good dielectric spacing between the terminal pins. The construction of socket llalso permits the socket and the associated relay to be correctly centered in the associated panel opening. The socket dielectric material.
further reduces residual corrosion caused by low or leakage voltage.
While the invention has been particularly shown and described with reference to a preferred embodiment thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
1. A panel mounted socket for a plug-in type of relay, said socket being adapted to be mounted in an opening associated panel for receiving the terminal pins of an associated relay, said socket comprising, in combination, a dielectric body portion having apertures for receiving the terminal pins of the associated relay, shoulder means on said body portion for engaging one edge of the associated panel opening first and second flexible lug means for engaging the opposite edge of said panel opening, said first lug means extending outwardly and at a downward angle from an upper surface of said body portion, said second lug means outwardly and at an upper angle from a lower surface of said body portion, and said first and second lug means defining a spacing therebetween, which is less than the thickness of said panel to thereby resiliently engage said panel a horizontal spacing formed between the ends of said lug means for accommodating and mounting the socket onto said panel, said lug means being flexed inwardly by the panel as said body portion is inserted into the associated opening, and a spacing between said flange means for accommodating and mounting the socket onto said panel whereby the socket can be inserted and mounted in position in its associated opening from either the front or back side of the panel, and the ends of the lug means resiliently engage opposite surfaces of said panel to thereby retain the socket in position.
2. A socket as in claim 1 further including flange means extending outwardly from the body portion of said socket and being tapered inwardly from opposing surfaces of said body portion toward a Hat vertical front, said flange limiting the flexing of said lugs by said panel to prevent damage to said lugs.
3. A socket as in claim 1 wherein the lug means are straddled for engaging the opposite surfaces of said panel.
I 4. An apparatus as in claim 1 wherein said lug means comprise a part of said bodyportion and extend outwardly at an angle from the top and bottom thereof and are flexed inwardly as a lug is pushed into its associated apparatus and, snap outwardly when the edge of the lug means move past the adjacent surface of said panel.