Model A

Ford Garage

Throttle Control Assemblies

The page above from the 2011 Judging Standards shows the Throttle Control Assembly variations.

Concern about accuracy of the Judging Standards Style 2 illustration and various timing dates in the Judging Standards led to further research at the Benson Ford Archives into the design progression of the Throttle Control Assemblies. That research is on-going and not yet complete.

The following content describes the actual progression of design changes of the major variations of the Throttle Control Assemblies and their optional constructions.

web page under construction


Judging Standards Style 1

A-9725 THROTTLE CONTROL ASSEMBLY - LHD
Released: 10/24/27
EI: 3988

A-9728 One-piece forged "EE" steel bracket (ribbed)
Forged steel bell-crank (cotter-pinned)
Forged steel accelerator pedal arm (pinned)
Forged steel throttle arm (pinned)
Cylindrical throttle arm return spring (small hooks)

JS Style 2

A-9727 ACCELERATOR BRACKET ASSY - LHD
Released: 4/5/28
EI: 8096
No part yet found for photo.

May never have been actually produced.

Part existed "on paper" a short time from 4/5/28 until 5/8/28.

A-9728 One-piece forged "EE" steel bracket (ribbed cross section design as shown in JS)
Released: 4/5/28
EI: 8096

Forged steel bell-crank (cotter-pinned)
Forged steel accelerator pedal arm (pinned)
Forged steel throttle arm (pinned)
Cylindrical throttle arm return spring (large & small hook)

Style 2b ~ Forged steel, elliptical cross section (not noted in JS)

A-9727 ACCELERATOR BRACKET ASSY - LHD
Released: tbd
EI: tbd

A-9728 One-piece forged "EE" steel bracket (elliptical cross section design added as optional construction)
Released: 5/8/1928
EI: 8521

Forged steel bell-crank (cotter-pinned)
Forged steel accelerator pedal arm (pinned)
Forged steel throttle arm (pinned)
Cylindrical throttle arm return spring (large & small hook)

Style 2c ~ Optional Construction ~ Two-piece electric butt-welded forged steel bracket (also not noted in JS)

A-9725 THROTTLE CONTROL ASSEMBLY - LHD
Released: 9/12/1928
EI: 10240

Same as Style 2b except:
A-9728 Two-piece electric butt-welded forged "EE" steel bracket
Released: 9/12/1928
EI: 10240

JS Style 3 ~ Introduction of malleable iron bracket

A-9727 ACCELERATOR BRACKET ASSY - LHD
Released: 9/28/28
EI: 10415

A-9728 One-piece malleable iron bracket
Released: 9/28/1928
EI: 10415

Forged steel bell-crank (cotter-pinned)
Forged steel accelerator pedal arm (pinned)
Forged steel throttle arm (pinned)
Cylindrical throttle arm return spring
Swaged and upset shaft "thrust washer feature"

JS Style 4 ~ Elimination of forged steel accelerator pedal arm

A-9725 THROTTLE CONTROL ASSEMBLY - LHD
Released: 11/24/28
EI: 11144

A-9728 One-piece malleable iron bracket
Forged steel bell-crank (cotter-pinned)
Integral steel shaft and formed accelerator pedal arm
Forged steel throttle arm (pinned)
Cylindrical throttle arm return spring
Swaged and upset shaft "thrust washer feature"

JS Style 4 ~ Optional Construction


photo not yet taken

Identical except:
Pinched pedal and throttle shaft with separate thrust washer

JS Style 5 ~ Introduction of integral forged throttle arm

A-9725 THROTTLE CONTROL ASSEMBLY - LHD
Released: 6/13/29
EI: 13195

A-9728 One-piece malleable iron bracket
Forged steel bell-crank (cotter-pinned)
Steel shaft with integral formed accelerator pedal arm, and integral forged throttle arm
Tapered throttle arm return spring (large & small hook)
Swaged and upset shaft "thrust washer feature"

JS Style 5 ~ Optional Construction



Identical except:
Pinched pedal and throttle shaft with separate thrust washer

JS Style 6 ~ Introduction of stamped steel bell crank

A-9725 THROTTLE CONTROL ASSEMBLY - LHD
Released: 12/30/29
EI: 15078

A-9728 One-piece malleable iron bracket
Stamped steel bell-crank (cotter-pinned)
Steel shaft with integral formed accelerator pedal arm, and forged throttle arm
Tapered throttle arm return spring (large & small hook)
Swaged and upset shaft "thrust washer feature"

Note that the timing of this engineering release is December 1929, whereas the Judging Standards place it at September 1930

JS Style 6 ~ Optional Construction



Identical except:
Pinched pedal and throttle shaft with separate thrust washer

JS Style 7 ~ Introduction of riveted stamped steel bell crank

A-9725 THROTTLE CONTROL ASSEMBLY - LHD
Released: 9/8/30
EI: 17523

A-9728 One-piece malleable iron bracket
Stamped steel bell-crank (riveted)
Steel shaft with integral formed accelerator pedal arm, and forged throttle arm
Tapered throttle arm return spring (large & small hook)
Swaged and upset shaft "thrust washer feature"

JS Style 7 ~ Optional Construction



Identical except:
Pinched pedal and throttle shaft with separate thrust washer

January 2013