1933
April
The first Shaft Drive 4 wheeler, known as the ‘S’ type (S4) was
brought into production (No 8798). This had an enlarged version of the SDDG4
four-cylinder single-acting engine with two speed gearbox. The S4 could be
optionally fitted with four wheel brakes. The cab was redesigned, a new lighter
boiler was located behind the driver and the bunkers were situated above the
boiler for ease of stoking.
1933
May
Full Doble two-engined shunting loco supplied to LMS (No 8805), the only true
Doble built with 1500 psi flash steam boiler.
1933
July
The first Model S6 was introduced. This was a tipper No 8821 which survives
today.
1933
September
Sentinel buy Garner Motors and transfer production of 3,4 and 6 ton diesel
or petrol lorries at Shrewsbury.
1933
November
The Model S8 was introduced (No 8894) but only another eight were built of
which only one survives (No 9105)
1934
Febuary
The S-Type tractor (No. 8656) was manufactured, but only five were made.
1935
March
Sentinel introduce their new range of 3,4 & 5 ton Sentinel-Garner diesel
& petrol lorries with Austin, Meadows or Perkins engines.
1935
September
Second Sentinel-Doble lorry built with V4 triple-expansion engine and coke
fired boiler.
1936
Sentinel ran into financial problems after Stephen Alley had sold all his
shares in the company. An Official Receiver brought in to rescue the company.
1936
September
Abner Doble returned to America, all further development suspended
1936
December
Sentinel rescued by Stephen Alley buying back into the company but Garner
Motors was sold off to repay creditors.
1937
October
Last DG waggon suppled to South Africa (N0 9329). A total of 851 DG’s
produced from November 1927.
1937
October
Sentinel buy rights to produce HSG (High Speed Gas) vehicles from Gilfords
Ltd.
1938 December
Last pre-war steam waggon exported to Dublin (No 9362). Some 405 ‘S’
type waggons were built since 1933.
1938
November
Sentinel show new Sentinel HSG 5 ton lorry and 35 seater bus at Commercial
Motor Show. Only one bus and about nine lorries actually sold before war intervened
to stop all road vehicle production.

| HISTORY OF THE SENTINEL |