Fader patent from the Victorian era

[pucho812]

I saw a patent the other day and I am trying to find it. It was for slide wire controls, basically what we would call a fader.
Was neat and was from the end of the 19th century.

 

[L´Andratté]

Interesting, what was it ´fading´(controlling)?

 

[JohnRoberts]

I saw a patent the other day and I am trying to find it. It was for slide wire controls, basically what we would call a fader.
Was neat and was from the end of the 19th century.

The historic patent database only goes back to 1840 https://www.uspto.gov/learning-and-resources/electronic-data-products/historical-patent-data-files

Older patents may be in physical drawers (shoes) but good luck finding them if they are not by date but by topic.

JR

PS; Back in the 70s I actually drove to Arlington VA and did my own physical patent search. 

 

[pucho812]

Interesting, what was it ´fading´(controlling)?

that I don't know. but it had drawings and looked neat.

 

[gyraf]

that's more or less the essence of patent drawings, ain't it?  ;D

 

[Squeaky]

Some of these will have cool drawings.

US859556A Method of and apparatus for fault location on electrical conductors (1905)
US739001A Conductivity Bridge (1903)
US664915A Electrical device for determining the resistance or conductivity of bodies (1896)
US794983A Rheostat (1903)
US550574A Electric-arc lamp (1895)
US817749A Electrical apparatus for determining the location of metallic ores (1902)
US540008A Electric Thermometer (1895)
US617418A Electrical Measuring Instrument (1899)
US806560A Electrical Measuring Instrument (1905)
US516804A Method for transmission of electricity (1894)

 

[pucho812]

that's more or less the essence of patent drawings, ain't it?  ;D

touché

 

[JohnRoberts]

that's more or less the essence of patent drawings, ain't it?  ;D

I did the drawings myself for my last (9th) patent (because I'm cheap). Far from elegant, but good enough for the USPTO examiners.

JR