Skip to main content
Advanced Search
M & T transmitter
M & T transmitter

M & T transmitter

Datecirca 1890
Inventory Number8095
ClassificationTelephone
Subject
    Maker M & T
    Place of Origin
      Dimensions7.5 × 7.5 × 7 cm (2 15/16 × 2 15/16 × 2 3/4 in.)
      Material
        DescriptionA telephone transmitter, consisting of a short cylindrical nickel-plated metal base and fluted black hard rubber mouthpiece. On the faceplate of the transmitter base which is secured by four slot-headed screws, the company name is stamped on a textured background above the mouthpiece, "M & T," and below, "Pat. Allowed."

        A circular opening with raised lip is centered on the back face of the base, possibly where the mouthpiece was intended to be attached to a transmitter stand or box.

        A length of electrical wire, partially covered in disintegrating insulation, extends from an opening in the side of the base.
        Signedraised letters on metal: +M+&+T+ PAT. ALLOWED
        FunctionConversion of sound into electrical signals for transmission over a distance
        ProvenanceJefferson Laboratory, Physics Department, Harvard University
        M & T transmitter
        M & T transmitter
        M & T
        Date: circa 1890
        Object number: 8096
        Bell hard rubber receiver/ transmitter
        Bell hard rubber receiver/ transmitter
        National Bell Telephone Company
        Date: 1879
        Object number: 8011
        Federal Telephone & Telegraph transmitter
        Federal Telephone & Telegraph transmitter
        Federal Telegraph Company
        Date: circa 1900
        Object number: 8087
        Bell hard rubber receiver/ transmitter
        Bell hard rubber receiver/ transmitter
        National Bell Telephone Company
        Date: 1879
        Object number: 8010
        Couch house telephone wall unit
        Couch house telephone wall unit
        S. H. Couch Company
        Date: circa 1905
        Accessories: solid telephone receiver
        Object number: 8092a
        unknown wooden receiver/ transmitter
        unknown wooden receiver/ transmitter
        American
        Date: late 19th Century
        Object number: 8003
        Bell Hunnings-Cone house telephone transmitter
        Bell Hunnings-Cone house telephone transmitter
        Henry Hunnings
        Date: circa 1892
        Object number: 8089a
        Ericsson receiver
        Ericsson receiver
        L. M. Ericsson
        Date: circa 1879
        Accessories: Ivory signaling rattle
        Object number: 8014c
        Edison carbon transmitter
        Edison carbon transmitter
        Thomas Alva Edison
        Date: circa 1879
        Object number: 8030
        unknown hard rubber transmitter
        unknown hard rubber transmitter
        Jefferson Physical Laboratory, Harvard University
        Date: early 20th Century
        Object number: 8016
        Ericsson receiver
        Ericsson receiver
        L. M. Ericsson
        Date: circa 1879
        Object number: 8014d
        Ladd transmitter
        Ladd transmitter
        W. Ladd & Company
        Date: 1872-1882
        Object number: 8015