Action Cars and Accessories
Chug-Chug Sound in Box Car
Cattle Car and Depot Set
Crane Car and Boom Tender
Crane Loader
Crossing Flasher
Crossing Gates
Crossing Gate
Dump Cars
Electronic Sound of Steam Box Car
Floodlight Car
Freight Unloading Depot
Giant Operating Crane
Gold Mine
Gravel Conveyor
Grain Elevator
Hopper Car Unloading Set
Horse Car & Depot Set
Log Dump Car Set
Log Loader with Log Car
Ore Dump Car Set
Ore Dump Set with Nite Glow
Operating Log Dump Set
Piggyback Flat Car Set
Piggyback Loader/Unloader
Operating Piggyback Loader/Unloader
Pipe Dump Car
Pipe Loader
Signal Man
Steam Whistle in Billboard
Tractor Loader
Unloading Box Car Set
Unloading Mail Car Set
Brown Box Era HO-Scale Trains
Operating Gravel Conveyor

TYCO's Operating Gravel Conveyor

Operating Gravel Conveyor 
-No.922 (1979 and 1980)

TYCO's Operating Gravel Conveyor (No.922) joins the company's product line in 1979 along with the similar Operating Gold Mine (No.936).  The Gravel Conveyor is lettered for "Moorestown Gravel Co." which is the hometown for TYCO Industries in New Jersey at the time this item was produced.
The Operating Gravel Conveyor, as well as the Operating Gold Mine and Operating Grain Elevator, is a non-electrical Action Accessory.  Beginning around 1980, TYCO moves away from the typical accessory item that required wiring to the power pack for operation and introduced items that did not demand much effort to put them into action.  The "gravel" provided with this item is actually a very common looking jewelry bead complete even with the same hole drilled through the center for stringing on a necklace.  TYCO uses the same bead cast in a gold-fleck color to serve as "gold" in the Gold Mine.
Considering TYCO produces three variations on this same base model, none survive for very long in the company's product line.  Introduced in 1979, the Operating Gravel Conveyor is in business in the '79 and '80 catalogs only.  The Gold Mine gets a three year run from 1979 to 1981; while the Grain Elevator is listed in catalogs from 1981 and 1982 only.
Look closely at the picture of the box for the Gravel Conveyor above and you'll notice a white sticker is blocking out something on the contents listing in the upper right corner of the package.  One assumes it must be calling for the Dump Car or Trackside Bin that is neither pictured, not ever part of the contents of this item.

TYCO utilized the same base model for at least three different entries in the Action Cars and Accessories line.  The plastic model of the overhead bin with conveyor belt operated by a hand crank in shed is the same for TYCO's Operating Gravel Conveyor (No.922); Operating Gold Mine (No.936); and (No.870) Operating Grain Elevator.  The 1979 TYCO catalog is the first to introduce this model with both the Operating Gravel Conveyor and Operating Gold Mine as new items for that year.  The third entry using this base design, TYCO's Operating Grain Elevator, arrives with the 1981 product catalog.    The 1982 TYCO catalog features the Operating Grain Elevator and is the last catalog to feature an Accessory with this base model.  The Operating Gold Mine is the most deluxe of the three selections, as this item also included an Operating Dump Car and two-piece Trackside Bin.  The Gravel Conveyor and Grain Elevator items do not include a freight car, nor do they have the separate Trackside Bin.