CERTAIN IM- PROVEMENTS IN CALL BELLS AND DOOR OR ALARM BELLS
Year: 1878

page_text: LETTERS PATENT to Benjamin Rock Jackson and William Winwood, both of
Birmingham, in the County of Warwick, for the Invention of "CERTAIN IM-
PROVEMENTS IN CALL BELLS AND DOOR OR ALARM BELLS."
PROVISIONAL SPECIFICATION left by the said Benjamin Rock Jackson and
William Winwood at the Office of the Commissioners of Patents on the 10th
May 1878.
BENJAMIN ROCK JACKSON and WILLIAM WINWOOD, both of Birmingham, in
the County of Warwick. "CERTAIN IMPROVEMENTS IN CALL BELLS AND DOOR
OR ALARM BELLS."
1. We will describe our Invention as applied to the ordinary call or table bell, the
chief feature of novelty being that by one pressure of the ordinary pusher the result
produced is multisonous.
We adopt the ordinary base or foot, and this carries an upright pillar, the upper
part of which is tubular, and in the interior is secreted a spiral spring, while upon
the exterior of this said tube is another tube, moveable, working freely in either
direction, while the surface or front has a serrated aperture, immediately above
this aperture is permanently affixed two hammers, and these for striking a pro-
jection arranged in the interior of the bell or gong, such as is usually employed
and secured to the summit of the pillar.
We adopt the ordinary down pusher, being a circular rod or piston, but we
arrange a projecting pin thereon, the said pusher being fed through the spiral
spring, while its projecting pin compresses the said spring and passes into the
serrated aperture above described, so that by a downward pressure to the pusher the
spiral spring will yield, the projecting pin traverse the serrated aperture in the outer
tube, moving the said tube, and consecutively throwing out the hammers at eacli
serration, and striking the bell or gong in its interior; upon releasing the pressure,
the spring indicated will carry the pusher back to its normal position.

page_text: .
2. In the door or alarm bell we construct an arm, at one end of which is the
plate for affixing to the frame of the door, while the extreme end carries an upright
or vertical pillar with the bell or gong at its apex; in the arm is an oblong slot or
aperture, and in this works freely upon a pin or tapered form, in trade designated a
trigger; in the vertical pillar is a circular hole, and in this moves horizontally a bar 5
or rod, the one end of which has a curvilinear slot connected to the said trigger, and
actuated by the same, while the other end carries the hammer for striking the
interior of the said bell or gong; intervening between the said hammer and vertical
pillar, but upon the bar, a rod is fed; a spiral spring, the purpose of which is that
the door coming in contact with the trigger, the bar or rod is withdrawn, the 1
spiral spring compressed until reaching a given position, when it is released and the
hammer repelled with its force against the interior of the bell or gong.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Benjamin Rock Jackson and William Winwood in the Great Seal
Patent Office on the 9th November 1878.
BENJAMIN ROCK JACKSON and WILLIAM WINWOOD, both of Birminghaın, in
the County of Warwick. “CERTAIN IMPROVEMENTS IN CALL BELLS AND DOOR
OR ALARM BELLS."
1. We will describe our Invention as applied to the ordinary call or table bell,
the chief feature of novelty being that by one pressure of the ordinary pusher the
result produced is multisonous.
We adopt the ordinary base or foot, and this carries an upright pillar, the upper
part of which is tubular, and in the interior is secreted a spiral spring, while upon
the exterior of this said tube is another tube, moveable, working freely in either
direction, while the surface or front has a serrated aperture; immediately above this
aperture is permanently affixed two hammers, and these for striking a projection
arranged in the interior of the bell or gong, such as is usually employed, and
secured to the summit of the pillar.
We adopt the ordinary down pusher, being a circular rod or piston, but we
arrange a projecting pin thereon, the said pusher being fed through the spiral
spring while its projecting pin compresses the said spring and passes into the
serrated aperture above described, so that by a downward pressure to the pusher
the spiral spring will yield, the projecting pin traverse the serrated aperture in the
outer tube, moving the said tube, and consecutively throwing out the hammers at
each serration, and striking the bell or gong in its interior; upon releasing the
pressure the spring indicated will carry the pusher back to its normal position.
2. In the door or alarm bell we construct an arm, at one end of which is the
plate for affixing to the frame of the door, while the extreme end carries an upright
or vertical pillar with the bell or gong at its apex; in the arm is an oblong slot or
aperture, and in this works freely upon a pin a tapered form, in trade designated a

page_text: trigger; in the vertical pillar is a circular hole, and in this moves horizontally a bar
or rod, the one end of which has a curvilinear slot connected to the said trigger,
and actuated by the same, while the other end carries the hammer for striking the
interior of the said bell or gong, intervening between the said hammer and vertical
pillar, but upon the bar or rod is fed a spiral spring, the purpose of which is that
the door coming in contact with the trigger the bar or rod is withdrawn, the spiral
spring compressed until reaching a given position, when it is released, and tho
hammer repelled with its force against the interior of the bell or gong.
And in order that this our said Invention may be fully understood we shall now
proceed more particularly to describe the same, and for that purpose shall refer to
the accompanying Sheet of Drawings, and to the letters of reference indicated
thereon.
Figures 1, 2, 3, 4 are views in elevation, and partly sectional, of our improvements
in call or table bells.
Figures 5 and 6 represent in side elevation and plan view of a door or alarm bell
constructed according to our Invention.
In Figures 1, 2, 3, 4 the same letters of reference indicate the same parts.
"
"a is the base or foot supporting the pillar "b," having a tubular section
connected to the same, and shown at "c" with a longitudinal slot "d;" at
the summit of "c" is permanently affixed the bell or gong "e," held in
its position by means of the screwed nut "f;" in the lower part of "c" is
arranged a spiral spring "g," while the upper part of "c" carries the pusher or rod
"h" with the knob "i" at the base of tho pusher "h" is arranged a projecting
stud or pin "," which traverses the longitudinal slot "d" without rotating; upon
the tube "c" is a moveable plate "k," in form semicircular, or approaching thereto,
held in position by a check or recess "," at the upper and lower part of "c;" this
moveable plate "k" has a serrated aperture or slot "m;" this said plate is clearly
shewn at Figure 2 and Figure 1, indicated by dotted lines; the projecting pin "j"
at the base of the pusher "," which works in the longitudinal slot "d," also engaged
in the serrated aperture or slot "m" of the moveable plate "k," while to the top
of the said moveable plate is arranged permanently the hammers "n."
In Figures 3 and 4 the stud or pin "j" is dispensed with, also the moveable
plate"" and in the position occupied by "j" we arrange a V shaped projection.
or lever ";""o" is a barrel working in the supports "p," to which is connected the
3 hainmer 22 at one end, while at the other end, and round the said barrel, is fed
a spiral spring "g," which compresses the said hammer "n" to the V shaped
lever.
"
"
The method of actuating it is as follows:-By applying a downward pressure to
the knob "," the pusher or rod "h," carrying the pin or stud "j," will traverse
the longitudinal slot "d" in the tubular part "c," and also the serrated aperture
"m," in the moveable plate "k," and as "j" passes each serration corresponding
blows will be registered upon the projection "A" in the bell or gong, either in the
descending movement or upon its returning to its normal position, which is effected
by the power of the spiral spring "g." By increasing the number of serrations in
the plate "k" the blows are likewise increased upon the bell or gong "Z" This
applies to Figures 1 and 2.
The
With reference to Figures 3 and 4 the actuating mechanism is the same.
projection "A" is here dispensed with, the hammer "n" being stationed near the
bell upon pressing the knob "," the pusher or rod "h" will force the hammer
from its position (by means of the V shaped projection or lever), and striking a
blow upon the bell (this is shewn by referring to Figure 4), upon releasing the
pressure by the force of the spring "g" it will be carried back to its original
position, as shewn in Figure 3, a blow being registered upon the bell in the
ascending movement as well as the descending.
In Figures 5 and 6 "a" is the bell or gong supported by the bracket or standard
"b," secured in any required position by means of the plate "c;" "d" is a
rod working horizontally in a slot in the bracket or standard "b," and

page_text: shewn at "e" by dotted lines in Figure 5; "f" is the hammer connected to "d"
by means of a screw, also answering the purpose for regulating the blow upon
the bell; "q" is a check or seat with a loop, indicated at "h; "i" is a lever.
passing through the said loop "h" (and by means of which the striking mechanism
is operated), and working upon the pin "j" in the bracket or standard "b" (in
commerce this lever is designated a trigger); between "g" and "b," and "b"
and "upon the rod d, is fed a spiral spring "k," for maintaining the striking
mechanism in one position.
The method of actuating is as follows:-By forcing the lever "," at "o," the
spring "k" will become compressed, the rod "d" moving in the slot "e"
horizontally, but upon the force being released from the said lever the force of the
said spring shoots the hammer "f" to the bell.
Having now described and ascertained the nature of this our said Invention, and
the manner in which the same is or may be performed, we would observe in con-
clusion that we do not limit ourselves to the precise details herein given, and shewn
on the accompanying Drawings, as various modifications may be made therein while
retaining the essential features of our said Invention, but what we claim as new,
and desire to be secured to us by the herein-before in part recited Letters Patent
is, certain improvements in call bells and door or alarm bells,―
First. The application and use of a moveable plate having a serrated slot or
aperture, to which plate is connected the hammers in combination with parts
herein-before described, and illustrated by Figuros 1 and 2.
Second. The application and use of the V shaped lever or any modification
thereof in combination with parts herein-before described, and illustrated by Figures.
3 and 4.
Third. The application and use of parts in combination for door or alarm bells,
herein-before described, and illustrated in Figures 5 and 6.
.
In witness whereof, wc, the said Benjamin Rock Jackson and William Winwood,
have hereunto set our hands and seals, this Eighth day of November, in the
year of our Lord One thousand eight hundred and seventy-eight.
PANT
TLAHNAZ