Year: 1887

page_text: Date of Application, 31st Dec., 1887
Specification Accepted, 3rd Feb., 1888
[Communicated from abroad by HENRY EMANUEL RUSSELL, Managing Director and
Secretary of the Russell and Erwin Manufacturing Company, of New Britain,
Connecticut, United States of America.]
I, HENRY HARRIS LAKE, of the firm of Haseltine, Lake & Co., Patent Agents,
Southampton Buildings, in the County of Middlesex do hereby declare the nature
of this invention and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
This invention relates to improvements in call-bells or signal-bells of the kind or
class in which the gong or sounding body is struck by a hammer actuated by a
spring; and the objects of the said invention are to obtain simplicity and economy in
the construction of such bells and to provide simple and efficient mechanism for
imparting a double stroke to the hammer for every reciprocating movement of the
operating rod.
In the accompanying drawing:
Figure 1 is a vertical section, partly in elevation, of a bell embodying these
improvements, the section being taken on the line w, w, Figure 3. This figure also
represents in section a portion of the door to which the bell is attached.
Figure 2 is a horizontal section of the same, partly in elevation, the section being
taken on the line x, x, Figure 1.
Figure 3 is mainly an elevation looking upon the inside of the gong, the frame or
standard and operating rod being shown in section on the line y, y, Figure 1, and
Figure 4 is a section on the line, a, Figure 2, illustrating details of construction.
A designates the door upon which the bell is mounted, and B the base for securing
the bell to the said door. Extending from one edge of the base B and at right angles
thereto is the plate-like frame or standard C, and at one edge thereof there is an
angular arm a, to which is secured the screw post b on which the gong D is mounted
and secured in place by the nut d. The base B, the plate like frame or standard C,
and the angular arm a are all stamped out of a single piece of sheet metal and bent
into the form shown.

page_text: E designates the tubular socket, preferably formed of sheet metal and provided with
a side extension e by which it is secured to the plate like frame C so as to bring the.
body of the socket in axial alignment with the gong D. Within this socket is a spiral
spring, one end of which rests against the arm a while the other end surrounds the
end of the operating rod F and rests against the trip pin g which is secured to the
said rod and projects therefrom into a sloth in the frame C, as shown in Figures 2
and 4.
The other end of the operating rod extends through the base plate B, the
door A, and bushing G, where it terminates in any suitable knob or handle k. The
side of the socket E nearest the frame is slotted for a short distance, in order to give
free movement to the trip pin g.
Upon the plate like frame C is pivoted the hammer-lever H, the body of which
lever is extended to one side of the slot and parallel thereto, as shown in Figure 4.
The hammer m is also secured to the said hammer-lever. A spring n is secured to
the post or stud by which the hammer-lever H is pivoted and presses upon the said
hammer-lever to hold it in the position shown. Upon the pivot o, Figures 1 and 4, I
secure a three armed tripping lever I, with one edge resting against the edge of the
hammer lever H. This tripping lever has two of its arms 2 and 3 substantially in
alignment with each other, with the arm 3 extending farther from the pivot, or, in
other words, longer than the arm 2. The tripping arm 4 stands at right angles to the
arms 2 and 3 and is bevelled alike on both sides and has its end projecting partly over
the sloth and consequently into the path of the trip pin g.
R
By pushing upon the operating rod F in a direction to compress the spring the
trip pin g strikes the tripping arm 4 of the tripping lever I and presses the short arm 2
against the hammer lever Hand moves the same in a direction to draw the hammer
away from the gong. As soon as the trip ping passes the tripping arm 4 the spring
throws the parts H 1 into their normal position, thereby imparting one stroke to the
gong. Upon the operating rod being released the spring forces it into its former
position, and in doing so the trip pin 7 strikes the tripping arm 4 thereby impinging
the long arm 3 against the hammer-lever H and moving it against the spring. As
soon as the ping passes the arm 4, the spring n returns the parts H I and imparts
another stroke of the hammer to the gong. By making the arms 2 and 3 of the
tripping lever of the proper relative length, the hammer m will have the same length
of stroke for either movement of the operating rod.
Having now particularly described and ascertained the nature of the said invention
and in what manner the same is to be performed as communicated to me by my
foreign correspondent I wish it understood that I claim :-
The combination of the operating rod having a trip pin ga spring for moving the
said rod in one direction a three aried tripping lever I pivoted on a fixed axis with
one arm in the path of the said trip pin, the pivoted hammer-lever H with one edge
resting against the other two arms of the said tripping lever I and having the
hammer m fixed on the end thereof and the spring for returning the said hammer-
lever substantially as described and for the purpose specified.
Dated this 31st day of December 1887
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.