Year: 1886

page_text: I, HERBERT JOHN HADDAN of 67, Strand in the County of Middlesex Civil
Engineer, do hereby declare the nature of this invention a communication to me
from abroad by the National Manufacturing Company of 205 N. Main Street,
Louisville, Kentucky in the United States of America, and in what manner the
same is to be performed to be particularly described and ascertained in and by the
following statement:-
My invention relates to improvements in Burglar Alarms, and the novelty
consists of the peculiar construction, combination arrangement and adaptation of
the several parts for service, substantially as hereinafter set forth and specifically
pointed out in the claims.
In my present invention I provide two bells and striking mechanisms therefor
which mechanisms are independent of or separate from each other, or they can be
wound jointly to strike the bells simultaneously, when the slide is operated The
bells are of different sizes and tones so that one shall give a louder and more violent
ringing sound than the other. The object of these devices is, that if a watchman
is employed it will only be necessary to wind the mechanism for operating the
smaller bell to give the alarm, but if the services of a watchman are dispensed
with, the mechanism for operating the larger or both bells, are set to alarm the
household.
The invention further consists of an improved construction of slide, an index and
intermediate gearing between the rotary operating shafts and such index shaft;
and it further consists of means whereby the operating cord or wire is easily and
automatically detached from the slide, when too great strain is exerted on the cord,
to obviate the danger of injuring the slide or other parts of the device; and it
finally consists of the improved details of construction hereinafter pointed out in
the claims.
In the drawings
Fic 1 is a front alevation of a hurglar alarm embodying my invention.

page_text: Referring by letter to the drawings A. designates an enclosing case, preferably
made rectangular and cabinet shape in form, provided with a hinged door B having a
dial or clock face C set therein at its upper end (see Fig. 1) said dial having a series
of figures or indicating marks to any desired number and corresponding with the
number of places or outhouses which are connected with the apparatus.
I provide a train of driving gearing to each of the bells, which are two in number;
said train of gearing being lettered D. and D¹ and they are located at and
supported on the rear walls of the enclosing case as shown in Fig. 2 but I would
have it understood that I do not limit myself to this particular form and arrange-
ment of parts.
Each train of gearing consists of a drive wheel D² which is mounted on a shaft E
and the shaft and wheel are rotated by a coiled spring E¹ one end of the spring
being rigidly secured to the shaft and the other end to the frame or casing.
The drive wheel D³ of each train of gearing meshes with a pinion (not shown) or
shaft F and the latter is provided with a pinion F which engages with a pinion G
secured on a sleeve g. and the sleeve of each train of gearing is loosely mounted on
a shaft H, which is common to both the sleeves.
The sleeve of each train of gearing is provided with a pallet or escapement
wheel H¹ and pallets I or I¹ of the bell striking levers J or J' are adapted to engage
and be actuated by said escapement wheels either separately or simultaneously as
will more fully hereinafter appear.
The levers J J are adapted to strike or operate on bells K K¹ either separately
or simultaneously when the train or trains of gearing are set in motion and the
bell K is larger than the bell K' and arranged over said bell K'; both bells being
mounted on a pin or shaft common to both, the bell K projecting from beyond
the edges of its fellow bell to enable the hammer J¹ to operate or strike thereon.
Above the gearing at the rear wall of the case A is arranged a transverse
horizontal strip L which provides a bearing for the rear ends of the horizontal
shafts M, M³, the front ends of which are provided with bearings or supports in
hangers L secured on the side walls of the case (see Fig. 3) The shafts M. Mare
provided with a number of cog wheels m four being shown on each shaft and at
their front ends said shafts are provided with mitre or bevel gear wheels M² M³
respectively adapted to gear with similar wheels N N¹ secured on a shaft N' near
each end thereof, said shaft being arranged near the front wall of the casing or
door B transversely thereof and journalled at its end in the hangers or blocks L¹.
At the rear end of the shaft M is a cam wheel M*, which is adapted to engage and
slide on an anti-friction roller a that is journalled on the upper horizontal bent
arm b of a rod b' that is adapted to move or slide vertically in guides c said
anti-friction roller being supported by the cam M when the device is set; and
when the shaft M is rotated the cam M' thereon raises the rod 61 which releases the
hammer arms and permits the train of gearing to operate either one of the said bell
striking mechanisms, or both of them as may be determined.
The lower end of the rod b¹ is loosely connected to a rod or arm 62 when the
device is set, which arm is secured to the bell hammer J of the train of gearing D
when the friction roller of the rod b₁ is raised by the cam, the lower end thereof is
disconnected from the arm b' and the train of gearing D operates to drive the bell
hammer J to ring the bell K.
The rod b¹ is further provided with an arm 63 which is adapted to engage the
arm d of the bell hammer J', the arm 6 being loosely connected to the arin d of
the lever and being disconnected from engagement therewith when the rod b¹
raises and permits the operation of the lever J¹ by the gearing D¹.
It will be observed that the trains of gearing are adapted to be wound and
operated independently of each other, or that both may be wound to strike the
bells as may be preferred. The gearing D may be wound to strike the bell K the
gearing D remaining inactive, or said gearing D¹ may be wound and the train D
be allowed to remain unwound or both of said trains of gearing may be wound to
strike both the bells simultaneously, as will be readily understood.

page_text: The shaft N has a bevel gear wheel N³ secured or keyed thereon at about its
middle, with which wheel is adapted to mesh a smaller pinion or bevel gear
wheel N mounted on a short shaft N3 suitably supported in a block or bearing n
secured upon the rear surface of the front or door of the case A.
The shaft N extends through an opening in the said door and has an indicating
hand or pointer O, secured upon its outer end, said pointer being adapted to move
around the dial and indicate thereon the number or name or point where an
entrance is attemped, the place, outhouse or dwelling being numbered or marked to
correspond to the same numeral or figure indicated by the hand or index O.
The side walls of the alarm case A are provided at their upper ends with
plates O having rectangular openings through which pass a series of slides P. The
slides are arranged in a horizontal position; and are eight in number, four being
arranged to pass through each of the side walls and plates O' of the case, but
I would have it understood that I do not limit myself to the number employed.
Wires for operating the slides are connected to one end at the projecting ends of.
the slides, and at their opposite ends said wires are connected to the door window
or other place on the building etc, and they can be run underground or on poles or
in any suitable manner.
Each slide is provided with a longitudinal slot p. and a movable rack bar Q,
said rack bar being arranged beneath the slide and supported thereon or connected
theret. by means of headed pins or studs p¹ passing through said slots p. and
bearing upon the outer surfaces of the slides as is obvious.
The rack bars are free to slide or move on the slides P. and each of said rack
bars engages one of the pinions m on the shafts M M¹, and serves to rotate one of
the shafts when the slides are set in motion, the headed pins striking against the
end of the slotted portion of the slides and carrying the rack bar with it. Each of
the slides is provided with stops S set at different distances from the ends thereof
and out of a line with each other, so that the distance travelled by said slides are
unequalled or varied to rotate the shafts M M¹, different degrees to move the
indicating hand to the numeral or mark designating the place where the burglary
is attempted and to which the operating slide is connected by the wire, as will be
understood.
A slide or cog wheel is provided for each figure or mark on the dial the slides
being connected to separate places or points and when one slide is moved it operates
one of the shafts M or M¹ independently of the other slides.
When one of the slides P operates the shaft M¹ (which it will be observed is not
provided with a cam wheel and is only connected to the striking mechanism
through the shafts N2 M and the intermediate gear wheels), the rotation thereof
is transmitted through the gear wheels M2 N to revolve the shaft N' and the
shaft N³ to move the indicator hand to the proper figure or character on the
dial and the motion of said shaft MN is connected to the shaft M by the gear
wheels N' and M3 and the rotation of the shaft M and the cam raises the rod b¹
which releases the arms of the bell-hammers of the bell striking mechanisms, as
desired.
Each slide is provided with two plates T arranged at their front projecting ends
on the upper and lower surfaces thereof, the adjacent faces of said plates having
lugs t t between which is fitted and clamped one end of one of the wires for
operating each of said slides, said wires being retained in position between the
lugs tt by means of a bent spring U, secured at one end to the slide and free to
bear or engage the plates T at its opposite end.
When a burglary is attempted the operating cord or wire which leads from that
point to its slide in the case is drawn upon and pulls its slide outwardly until the
stop S thereof comes in contact with the case, and thus serves to set the shaft M
or M¹ in motion, and consequently the bell striking mechanism or mechanisms and
if the pull or strain on the cord or wire is continued it will automatically disengage
itself from the retaining spring U and lug t thus obviating the danger of breaking

page_text: the slide its stop S and other parts of the case or mechanism, as will be readily
understood.
The shafts M or M¹ will in turn rotate one of the bevel wheels N N¹ upon the
shaft N' and set in motion the shaft N' through the medium of the wheels N³ N*
upon which the index or pointer is mounted, causing the same to move to the
numeral or mark to which it corresponds, to the place or point where the burglary
is attempted, the movement of the slide and consequently that of the pointer, being
limited by the stops S upon the slides. When the shaft M is rotated by one of the
operating slides, or when the shaft M is rotated by motion from the shaft M
transmitted through the shaft N2 and the intermediate gear wheels, the roller a is
raised by the cam M' and the rod b¹ releases the arms b2 or 3 or both, thus
permitting either or both of the trains of driving gearing to operate either or both
of the levers J J³, to give the alarm upon the bells K or K¹.
Having now fully described the nature of my invention and in what manner the
same is to be performed, I declare that what I claim is ;-
1. The combination of the enclosing case provided with a dial, the driving shafts
journalled in the case, a series of slides having racks adapted to rotate said shafts,
a shaft carrying an index geared to the driving shafts, and independent bell
striking mechanism adapted to be operated simultaneously when the driving shafts
are rotated, substantially as described.
2. As an improvement in burglar alarms the combination of an enclosing case,
the driving shafts, one of which carries a cam, a series of slides adapted to rotate
said shafts, a rod supported on the cam, and bell striking mechanisms connected
with the rod and adapted to be set for operation either separately or jointly
substantially as described.
3. In a burglar alarm, the combination of an enclosing case provided with a dial,
the operating shafts, the slotted slides having rack bars connected thereto and
gearing with the driving shafts, a shaft provided with an indicating hand and
geared to the driving shafts, and separate bell striking mechanisms connected with
the rod and adapted to be set for operation either independently of each other or
jointly substantially as described.
4. The combination with an enclosing case having a dial, driving shafts
journalled in said case, and having a series of pinions, a series of slides having a
stop and rack bar adapted to mesh with and rotate the pinion of the driving shafts,
said rack bars being secured in said slides by headed pins projecting through a slot
therein, a shaft No geared to said driving shafts, an index shaft geared to said
shaft N³ two independent trains of gearing D D₁ bells K K' hammers J J¹ one of
which has an arm d and a sliding rod b¹ having a friction roller a at its upper end
operated by the cam M and having an arm b³ from which the arm d is released
when said rod is operated, substantially as described.
5. In a burglar alarm of the class described, the combination with the slide of a
plate T secured to the slide and a spring also secured to the slide and bearing on
the plate to clamp the operating cord or wire between said spring and plate as set
forth.