House £s? Garden 
THE “VULCAN” LOCKS 
,r ~T~^ he age of Iron is past and the age 
of Steel is fully born. This 
new material, and the latest 
machine processes, have been 
utilized by the Yale & Towne 
Manufacturing Company of 
New York and Stamford, 
Yv Conn., to create a new 
American product, viz., the 
“Vulcan” line of Builders’ Door Locks, formed wholly 
from wrought materials, machine-made throughout and 
interchangeable in all its parts. The “Vulcan” lock, 
first introduced in 1897, embodies new principles, new 
materials, new designs, new mechanism and new results. 
The case, cap and internal mechanism are all of cold 
rolled steel ; the front is formed of a base-plate of the 
same material, over which is drawn a heavy skelp of 
wrought bronze or brass ; the bolt-heads are of swaged 
bronze ; and the keys, shown by Figure 1, are of cold 
forged steel. 
The Cycloid Knob Action, for 
transmitting motion from the knob to 
the latch bolt and consisting of inter- 
geared levers with pivotal motions, as 
shown by Figure 2, is substituted for 
the sliding action heretofore generally 
in use. The construction provides two 
springs, one acting on the latch-bolt 
only and both acting on the knob, thus 
giving the most perfect “ easy spring ” 
action. All of the working parts are 
provided with broad bearings, accu¬ 
rately fitted by machine processes. 
The Bracket Bearing, shown by Figure 3, substitutes 
for the loose and inefficient thimble heretofore used a 
bearing which perfectly guides and supports the knobs. 
A lock spindle is practically a short piece of shafting, with 
a wheel or pulley (the knobj on each end. Obviously 
the bearings of such a shaft should be as far apart, and as 
near to its ends as possible. In common locks, on the 
contrary, they are at the surface of the door and therefore 
near together. The bracket bearing has long been used 
with the Yale Locks and is now associated also with the 
“Vulcan” locks. It 
consists in a construction 
of the knob shank and its 
supporting thimble, such 
as to bring the bearings or 
points of support as close 
to the knobs, and therefore 
as far apart as possible. 
The illustration herewith 
(Figure 3) shows the old 
and the new constructions, 
the dotted lines indicating the play or “wabble” of the 
common knob, with its clumsy adjustment by means of a 
row of screw holes in the spindle, supplemented by tin 
washers in a loosely fitting thimble close to the surface of 
the door. 
The Triplex Spindle, first introduced with the Yale 
Locks, was adopted also for use with the “ Vulcan ” Locks. 
Fig. z 
As shown by Figure 4, the spindle consists of three 
triangular rods which, when united, form a square spindle, 
to one end of which one knob is permanently pinned. 
The other knob carries a set-screw which bears on the 
central piece, or wedge, of the spindle, and the tightening 
of the screw expands the spindle, forcing it into frictional 
Fig- 5 
engagement with the knob shank, thus holding the knob 
securely at any point, affording perfect adjustment with¬ 
out resort to washers, and eliminating all looseness or rattle 
of the knobs. 
The mechanical combination thus formed com¬ 
prises the triplex spindle, admitting of perfect longi¬ 
tudinal adjustment of the knobs, 
and the bracket bearing, which 
supports and guides the two ends of 
the spindle close to the knobs. 
The result is a perfect mechanical 
assemblage, easy to apply, eliminat¬ 
ing all causes of future disturbance 
and certain to give permanent 
satisfaction. 
Exhibit rooms for the conven¬ 
ience of architects and their clients 
are provided at the Company’s 
General and Branch Offices. These offices are located as 
follows: General Offices, 9, 1 1 and 1 3 Murray Street, 
New York; Branch Offices, 131 Wabash Avenue, 
Chicago ; 630 W'itherspoon Building, Philadelphia ; and 
1 2 Pearl Street, Boston. The works are at Stamford, 
Conn. 
Fig- 4 
Fig- 5 
In writing to advertisers please mention House and Garden 
IX 
