A spring loaded roller fabricated and added to the projector after the last sprocket that feeds the takeup reel. The roller absorbs the shock when the takeup reel starts and jerks on the film.

The fabracated pieces for the spring loaded takeup roller. On the left is 1/4" steel stock with brass tubing inserted as the main support bearing. The tubing is aligned and secured in place with Gorilla super glue, then further secured using JB Weld to build a solid surface between the brass tubing and the 1/4" square steel piece. A 6-32 threaded hole is used to screw in the roller shaft on the front side and to secure a spring on the back side.
On the right a brass plate is used to secure the bearing shaft that the left piece slides over. The short rod is a stop to prevent the roller from hitting the roller's at the takeup exit of the projector. Black shrink tubing over the short rod acts as a cushion in case the roller is pulled into the rod. The L shaped piece is an original Holmes piece that fits over the last sprocket before takeup and prevents film from wrapping around the sprocket. This piece is secured to the brass plate using Gorilla super glue and JB Weld.
Everything is painted gray after each stage of fabrication.

The two pieces fitted together

The roller screwed into place

A brass washer press-fitted onto the arm shaft bearing and secured using JB weld.
A dab of JB Weld is put on the end of the stop rod to dress up the end of the rod.
The spring is installed.
The roller can be unscrewed and removed for cleaning.

The arm is a brass on steel bearing and should not need oil or removal. But if necessary, the silver nut is removed and then the bearing shaft can be unscrewed.
The spring is loose and free on the screw. A lock nut keeps the screw tight.

One of the mounting screws has spacers covered with shrink tubing
acts as a rest for the spring to pull the roller arm on.

TOP-
Roller installed



BOTTOM-
Film threaded