Answers.Body: <p>The first two are: </p>
  
  <p><a href="https://www.bricklink.com/catalogItemIn.asp?P=3639&amp;in=S" rel="noreferrer">Hinge Plate 2 x 4 with Articulated Joint - Male</a></p>
  
  <p><a href="https://i.sstatic.net/3LEhn.gif" rel="noreferrer"><img src="https://i.sstatic.net/3LEhn.gif" alt="enter image description here"></a></p>
  
  <p><a href="https://www.bricklink.com/catalogItemIn.asp?P=3640&amp;in=S" rel="noreferrer">Hinge Plate 2 x 4 with Articulated Joint - Female</a></p>
  
  <p><a href="https://i.sstatic.net/mgC33.gif" rel="noreferrer"><img src="https://i.sstatic.net/mgC33.gif" alt="enter image description here"></a></p>
  
  <p>They are still used in modern sets sometimes.</p>
  
  <hr>
  
  <p>The last two are called "bracket" pieces. They have not appeared in any recent sets.</p>
  
  <p><a href="https://www.bricklink.com/catalogItemIn.asp?P=4169&amp;in=S" rel="noreferrer">Bracket 2 x 3 - 1 x 3 (Train Signal Stand)</a></p>
  
  <p><a href="https://i.sstatic.net/anbtV.gif" rel="noreferrer"><img src="https://i.sstatic.net/anbtV.gif" alt="enter image description here"></a></p>
  
  <p><a href="https://www.bricklink.com/catalogItemIn.asp?P=2422&amp;in=S" rel="noreferrer">Bracket 2 x 2 - 1 x 4</a></p>
  
  <p><a href="https://i.sstatic.net/kuMz4.gif" rel="noreferrer"><img src="https://i.sstatic.net/kuMz4.gif" alt="enter image description here"></a></p>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2017-04-21T19:34:31.783Z
Answers.Text: Wow, and the 1x3 "Train Signal Stand" was only in ONE set in White! (The 6828 Twin-Winged Spoiler).  Thanks to all for the help!
Answers.UserDisplayName: sampoerna quatrain
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2017-04-21T14:58:33.857Z
Answers.LastActivityDate: 2017-04-21T14:58:33.857Z
Answers.UserDisplayName: Alexander O'Mara
Answers.Body: <p>I found the <a href="https://www.bricklink.com/v2/catalog/catalogitem.page?P=2422&amp;idColor=0#T=P&amp;C=0" rel="nofollow noreferrer">left bracket</a> on <a href="http://swooshable.com/snot?degree=90&amp;page=2" rel="nofollow noreferrer">Swooshable</a>, a website that collects SNOT building techniques (I filtered by degree of 90). As you can guess, it was used for attaching things sideways, and appeared in 13 sets from 1987 to 1999.</p>
  
  <p>Swooshable doesn't list the other piece, but Bricklink categorized the first one as "<a href="https://www.bricklink.com/catalogList.asp?catType=P&amp;catString=4" rel="nofollow noreferrer">Bracket</a>", which led me to the second piece, a <a href="https://www.bricklink.com/v2/catalog/catalogitem.page?P=4169#T=P" rel="nofollow noreferrer">train signal stand</a>. It appeared in sets from 1980 to 1988.</p>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2017-04-21T15:00:53.177Z
Answers.LastActivityDate: 2017-04-21T15:00:53.177Z
Answers.UserDisplayName: Mr. Shiny and New 安宇
Body: <p>I recently bought a lot of Lego that was mostly 1990's bricks, and I had a few things I couldn't identify.  One I found on Bricklink, but the other two are baffling me. Here is the first one, a different sort of hinged plate that I hadn't seen before:
  <a href="https://i.sstatic.net/GFezh.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/GFezh.jpg" alt="enter image description here"></a>
  <a href="https://i.sstatic.net/7GRwf.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/7GRwf.jpg" alt="enter image description here"></a></p>
  
  <p>You would think these would be "modified plates," but I couldn't find them.<br>
  Even stranger are these pieces (two varieties):
  <a href="https://i.sstatic.net/xtNwe.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/xtNwe.jpg" alt="enter image description here"></a>
  These obviously allow for perpendicular placement of other pieces, and again I would think they were modified plates, but they aren't, at least in Bricklink.</p>
  
  <p>I'm most curious to see how these pieces were used in sets.
  Thank you!</p>
  
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2017-04-21T14:52:25.000Z
Comments.Text: The top one is https://www.bricklink.com/v2/catalog/catalogitem.page?P=3640#T=C and corresponding male part. I remember having a dump truck which used one of these (in black) as the base, allowing it to bend in the middle.
Comments.UserDisplayName: Matthew
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2017-04-22T01:54:30.577Z
Comments.Text: The white stand was also used in a police set for like a flag pole. And the hinge was used as a truck and trailer set that I had. (Still have not pieces, but I don't think I have the instructions that go with. So I can't tell you set numbers... sorryz)
Comments.UserDisplayName: MasterBuilderDad
Tags: <piece-information><part-identification>
Title: Please identify these two kinds of Lego bricks (circa 1990's)
UserDisplayName: sampoerna quatrain
ThreadText: # Please identify these two kinds of Lego bricks (circa 1990's)
  
  (Asked by: username_0 on 2017-04-21)
  
  I recently bought a lot of Lego that was mostly 1990's bricks, and I had a few things I couldn't identify. One I found on Bricklink, but the other two are baffling me. Here is the first one, a different sort of hinged plate that I hadn't seen before:
  [![enter image description here](https://i.sstatic.net/GFezh.jpg)](https://i.sstatic.net/GFezh.jpg)
  [![enter image description here](https://i.sstatic.net/7GRwf.jpg)](https://i.sstatic.net/7GRwf.jpg)
  
  You would think these would be "modified plates," but I couldn't find them.  
  Even stranger are these pieces (two varieties):
  [![enter image description here](https://i.sstatic.net/xtNwe.jpg)](https://i.sstatic.net/xtNwe.jpg)
  These obviously allow for perpendicular placement of other pieces, and again I would think they were modified plates, but they aren't, at least in Bricklink.
  
  I'm most curious to see how these pieces were used in sets.
  Thank you!
  
  **Tags:** piece-information, part-identification
  
  > **Comments:**
  > **username_1**: The top one is https://www.bricklink.com/v2/catalog/catalogitem.page?P=3640#T=C and corresponding male part. I remember having a dump truck which used one of these (in black) as the base, allowing it to bend in the middle.  
  > **username_2**: The white stand was also used in a police set for like a flag pole. And the hinge was used as a truck and trailer set that I had. (Still have not pieces, but I don't think I have the instructions that go with. So I can't tell you set numbers... sorryz)  
  
  ---
  
  ## 2 answers
  
  ### Answer by username_3 on 2017-04-21. Score: 6 | Accepted answer
  
  The first two are:
  
  [Hinge Plate 2 x 4 with Articulated Joint - Male](https://www.bricklink.com/catalogItemIn.asp?P=3639&in=S)
  
  [![enter image description here](https://i.sstatic.net/3LEhn.gif)](https://i.sstatic.net/3LEhn.gif)
  
  [Hinge Plate 2 x 4 with Articulated Joint - Female](https://www.bricklink.com/catalogItemIn.asp?P=3640&in=S)
  
  [![enter image description here](https://i.sstatic.net/mgC33.gif)](https://i.sstatic.net/mgC33.gif)
  
  They are still used in modern sets sometimes.
  
  ---
  
  The last two are called "bracket" pieces. They have not appeared in any recent sets.
  
  [Bracket 2 x 3 - 1 x 3 (Train Signal Stand)](https://www.bricklink.com/catalogItemIn.asp?P=4169&in=S)
  
  [![enter image description here](https://i.sstatic.net/anbtV.gif)](https://i.sstatic.net/anbtV.gif)
  
  [Bracket 2 x 2 - 1 x 4](https://www.bricklink.com/catalogItemIn.asp?P=2422&in=S)
  
  [![enter image description here](https://i.sstatic.net/kuMz4.gif)](https://i.sstatic.net/kuMz4.gif)
  
  > **Comments:**
  > **username_0**: Wow, and the 1x3 "Train Signal Stand" was only in ONE set in White! (The 6828 Twin-Winged Spoiler).  Thanks to all for the help!  
  
  ---
  
  ### Answer by username_4 on 2017-04-21. Score: 1
  
  I found the [left bracket](https://www.bricklink.com/v2/catalog/catalogitem.page?P=2422&idColor=0#T=P&C=0) on [Swooshable](http://swooshable.com/snot?degree=90&page=2), a website that collects SNOT building techniques (I filtered by degree of 90). As you can guess, it was used for attaching things sideways, and appeared in 13 sets from 1987 to 1999.
  
  Swooshable doesn't list the other piece, but Bricklink categorized the first one as "[Bracket](https://www.bricklink.com/catalogList.asp?catType=P&catString=4)", which led me to the second piece, a [train signal stand](https://www.bricklink.com/v2/catalog/catalogitem.page?P=4169#T=P). It appeared in sets from 1980 to 1988.
  
  
  ---
  
  