Year: 1889

page_text: Date of Application, 14th Oct., 1889-Accepted, 15th Mar.. 1890
In the casing A is a ring B in which a cavity or opening is made for receiving the
staple. The pawl or spring catch C acts as tumbler and is held by means of suitable
springs in the recess F on the axis of the disc E on the circular bolt B. When the
spring catch C is raised by means of the key bit the circular bolt can be turned
whereby the bit gears into the recess in the boit B.
The bolt B arranged in the casing A and rotating on the spindle a consists of the
circular parts B' and the disc or discs E arranged on one or both sides of the bolt
and provided with the recesses F. The claw FI of the tumbler C, which latter is
operated on: by the spring D, gears into the recesses F in the bolt B. The tumbler C
turns on the fulcrum g and is provided with an arm c, against which the key bit H
operates.
When the key bit is turned in the direction of the arrow f, Figure 1, the claw F¹
of the tumbler C will be forced out of the recess F in the bolt B, so that the latter
can be readily rotated. In the construction as represented by Figures 1 to 4 we
prefer to use a key of similar form to that shown in the drawings with rounded end e
to the key bit for readily operating the bolt B.
In unlocked position the bolt occupies such a position that the ends 66 are flush
with the surface plate (Figure 1), but if the bolt is to be locked, the key is turned
in the direction of the arrow f (Figure 1), once if the lock is single action, and twice
with double action locks.
The key bit H will first release the claw F from its gear with the tumbler C, then
gear into the slot 62 of the bolt B until the circular part of the bolt has protruded
through the opening G in the surface plate and reached the position shown in
Figure 2. The bolt is unlocked by turning the key in the opposite direction to that
represented by the arrow in Figure 1.
Figures 5 and 6 represent our invention applied to a box or case lock. The bolt
consists of a ring B turning on the fulcrum a and cut away at 63 to allow the bow I
Price 27

page_text: of the staple I¹ attached to the lid of the box or case to enter the casing A of the
lock through the opening A¹, as the bolt is in this case located entirely within the
casing A. The bow of the staple must be of such size that the part B of the bolt
can readily pass through the same, but without unnecessary play. The bolt is
operated by the key bit gearing into the recesses in the inner periphery of the
circular bolt. The tumbler C, which is acted on by the spring D, gears into
recesses in the bolt B.
Figure 7 represents a single drawer lock of similar construction to those shown
in Figures 1 to 4. In locked condition the bolt is retained in the recess in the rail
above the drawer and protrudes so far beyond the surface plate G that the drawer is
securely held in position. When the bolt is unlocked the ends of the circular
bolt will stand flush with the surface plate.
Figure 8 represents the application of our invention to a desk lock with two
circular bolts B entirely enclosed within the casing A. Each of the bolts B are cut
away at 63, similar to the bolt in Figure 5. When the lid of the desk is lowered the
bows I of the staples pass through the openings of the surface plate and the cut
away parts of the bolt B. When the key is turned the circular arms B¹ of the
bolts B will glide into the bows of the staples and hold the lid of the desk securely
in position.
Having now particularly described and ascertained the nature of our said invention,
and in what manner the same is to be performed, we declare that what we
claim is
Circular lock construction for all kinds of locks, consisting of the ring or circular
bolt B arranged in the casing A and provided with a tumbler C, D, E, F, sub-
stantially as and for the purpose set forth in the foregoing specification, and illustrated
in the accompanying drawings.
Dated this 11th day of October 1880
ADOLF G. GOLYOSY.
DANIEL EHRLICH.
Per W. H. Beck,
Agent.