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Corbin Russwin product is modified it may no longer meet industry certification and quality control standards applicable to the original product and is no longer a genuine Corbin Russwin product.

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and Egress Hardware Group, Inc. is prohibited. Patent pending and/or patent www.assaabloydss.com/patents.

Do You Have the Current Model?

UT5200 Parts Manual

Historically, no lockset design has
been as closely associated with the
Corbin Russwin brand name as the unit
lock. The unit lock’s sturdy, rugged
construction gives it an unrivaled lifetime
of smooth, trouble-free operation.
Tens of thousands of these locks have
already outlasted the buildings they
were installed in! Now, past its 100th
anniversary, the unit lock has evolved
through several different models.

The rectangular chassis unit lock was
invented by Byron Phelps, former mayor
of Seattle, Washington. He brought
his invention across the country in
1898 to P.F. Corbin, who licensed and
manufactured it. The first patents were
issued on January 31 and June 6, 1899.
Today’s UT5200 Series locksets are
closely based on that design.

Instead of the large rectangular chassis
by Corbin, the earliest Russwin unit lock
had a different design and door prep. A
1" round knob spindle was completely
separated from a small rectangular case
around the latch area. This design was
invented by Henry Voight, an extremely
prolific lock inventor of that era, then
employed by Russell & Erwin Mfg. Co.
Its first patents issued on April 19 and
August 30, 1904.

The exploded views in this manual
are limited to the current model of
UT5200 Series parts. For most functions,
this includes all locks manufactured
since 1968, although certain current
parts will operate in some older models.
Since locksmiths are often called on to
rekey older locksets, we include cylinder
removal instructions for earlier models

later in this manual. Use the table below
to help identify the various models.

In reviewing the table, keep in mind
that Corbin Russwin began as separate
companies, so there is not a Corbin-to-
Russwin cross-reference for the early
models.

Old catalogs, price books and
engineering drawings, as well as physical
samples were studied to compile the
table. However, a few pieces of the
puzzle were still missing at press time.

Anyone with locksets or positive
documentation to correct or add to this
information is invited to contact the
Corbin Russwin Marketing Department.

With lock removed, apply these clues to the table below to determine the model of your lock.

• If it bears the Russwin name and the knobs have a round shaft separate from a small rectangular chassis, it is the Russwin

2100/2800 Series.

• Look for numbers cast into underside of escutcheons.

• Observe keyway orientation and measure chassis dimensions.

• Read latest patent date stamped into chassis cover.

• Look for numbers stamped into top or bottom edge of chassis frame (

Note: some numbers are

not

significant

)