Improvements in Electrical Tell-tale Alarm Apparatus for . Indicating whether an Insufficient or Excessive Amount of Feed is being Supplied to Flour Grinding Mills, Sifters, and other like Machine
Year: 1884

page_text: Improvements in Electrical Tell-tale Alarm Apparatus for
.
Indicating whether an Insufficient or
Excessive Amount
of Feed is being Supplied to Flour Grinding Mills, Sifters,
and other like Machine
We, THOMAS FREDERICK HIND, and ROBERT LUND, both of the Atlas Works,
Edward Street, Preston in the County of Lancaster, Flour Mill Engineers, do
hereby declare the nature of said Invention for IMPROVEMENTS IN ELECTRICAL
'
TELL-TALE ALARM APPARATUS FOR INDICATING WHETHER AN INSUFFICIENT OR
EXCESSIVE AMOUNT OF FEED IS BEING SUPPLIED TO FLOUR GRINDING MILLS,
SIFTERS, AND OTHER LIKE MACHINES to be as follows:-
"
This invention consists in providing the spout through which the material to be
operated upon is conducted to the hopper with two collapsible or accordion jointed
diaphragms, the collapsing or distending of the diaphragms being influenced by
the amount of feed passing through the spout and so arranged as to cause an
electric bell to be sounded whenever the feed is either insufficient or excessive.
The diaphragms fill openings in the conducting spout arranged one above the other
that is to say, one near to and the other some distance from the hopper.
The lower diaphragm, so long as the supply of material is sufficient, will be
distended or pushed out by the pressure of the material upon its inner surface and
whilst so distended will hold apart the terminals of an electrical circuit. Should
the amount of feed, however, become insufficient, the pressure of the material upon
the inner surface of the diaphragm will be removed and electrical contact between
the terminals will be effected, thereby causing an electric bell to be sounded and
notice given to the attendant.
In the case of the upper diaphragm the above described arrangement is reversed
so that when the feed becomes excessive causing the material to accumulate and
therefore to rise unduly in the conducting spout the diaphragm will be pushed
outwardly thereby putting the terminals in contact and causing the bell to be
sounded as before. We arrange a jointed vibrating arm or finger provided with a
holding-up or back spring to rest upon the outside surface of each of the diaphragms
for the purpose of putting the terminals in and out of contact as above described.
Only one electric bell will be required for a series of grinding mills or other
machines working together in one room in which case an indicator of the ordinary
construction in electrical circuit with each machine is employed to point out the
particular machine requiring attention as will be well understood.
W. LLOYD WISE,
Per F. J. Brougham,
Applicants Agent.

page_text: We, THOMAS FREDERICK HIND, and ROBERT LUND, both of the Atlas Works,
Edward Street, Preston, in the County of Lancaster, Flour Mill Engineers, do
hereby declare the nature of our invention for "IMPROVEMENTS IN ELECTRICAL
TELL-TALE ALARM APPARATUS FOR INDICATING WHETHER AN INSUFFICIENT OR
EXCESSIVE AMOUNT OF FEED IS BEING SUPPLIED TO FLOUR GRINDING MILLS,
SIFTERS, AND OTHER LIKE MACHINES" and in what manner the same is to be
performed to be particularly described and ascertained in and by the following
statement:
This invention consists in providing the spout through which the material to be
operated upon is conducted to the hopper with two collapsible or accordion jointed
diaphragms, the collapsing or distending of the diaphragms being influenced by
the amount of feed passing through the spout and so arranged as to cause an
electric bell to be sounded whenever the feed is either insufficient or excessive.
The diaphragms fill openings in the conducting spout arranged one above the other
that is to say, one near to and the other some distance from the hopper. The
lower diaphragm, so long as the supply of material is sufficient, will be distended
or pushed out by the pressure of the material upon its inner surface and whilst so
distended will hold apart the terminals of an electrical circuit. Should the amount
of feed, however, become insufficient, the pressure of the material upon the inner
surface of the diaphragm will be removed and electrical contact between the
terminals will be effected, thereby causing an electric bell to be sounded and notice
given to the attendant.
In the case of the upper diaphragm the above described arrangement is reversed
so that when the feed becomes excessive causing the material to accumulate and
therefore to rise unduly in the conducting spout the diaphragm will be pushed
outwardly thereby putting the terminals in contact and causing the bell to be
sounded as before. We arrange a jointed vibrating arm or finger provided with a
holding up or back spring to rest upon the outside surface of each of the diaphragms
for the purpose of putting the terminals in and out of contact as above described.
Only one electric bell will be required for a series of grinding mills or other
machines working together in one room in which case an indicator of the ordinary
construction in electrical circuit with each machine is employed to point out the
particular machine, requiring attention as will be well understood.
In the accompanying Drawings Fig. 1 is a front view and Fig. 2 a side view
(partly in, section) showing the application of our invention to an ordinary form of
conducting spout.
1.I
A, A', are respectively the upper and lower diaphragms, made preferably of soft
leather and, fitted, over a, projecting rim 1 of the frames B, B, which fit into
openings in the spout C. 2, 2, are holding up springs resting upon the exterior of
the jointed vibrating arms or wings 3, 3, the lower extremities of the springs 2, 2,
forming terminals 4, 4, arranged to make contact, as required with the other
terminals 5, 5, on the metal stands 6, 6. D is an electric bell which may be placed
in any convenient position or in connexion with an indicator as herein before
mentioned, suitable conducting wires 8, 8, completing the circuit with the battery
which may be of any convenient kind. To prevent the battery being run down
unnecessarily a switch 9 is provided so that the circuit may be broken when the
bell rings. The diaphragms A, A¹, and wings 3, 3, are shewn in the Drawings in
the position they will occupy when the terminals 4, 4, and 5, 5, are out of contact,
that is to say, when the material has accumulated within the spout C so as to press

page_text: outwardly upon the lower diaphragm A¹ but has not risen high enough to press
upon the upper diaphragın A. When however the amount of feed is excessive and
the material rises within the tube so as to press against the upper diaphragm. A, or
is insufficient to rise in the tube and press against the lower diaphragm A', the
diaphragms A, A¹, and wings 3, 3, assume the positions shewn in dotted lines and
the terminals 4, 4, and 5, 5, will have been put in contact and the bell sounded.
An air-tight cover E is provided to exclude the admission of dust to that part of the
apparatus where the terminals are situated.
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 :
1. Arranging a collapsible diaphragın to be pushed outwardly by the material
within a conducting spout so as to cause the terminals of an clectrical circuit to be
put either in or out of contact substantially as described and shewn in the
Drawings for the purpose set forth.
2. The combination with a diaphragm employed for the purpose set forth of a
jointed vibrating arm or wing and a holding up spring substantially as described
and shewn in the Drawings.
3. The combination of parts constituting the improved electrical tell-tale alarm
apparatus constructed, arranged, and operating substantially as described and shewn
in the Drawings.
Dated this oth day of November 1857.
THOS FREDK HIND.
25 Witness:
Yates W. Boot',
Patent Agent,
30, Guildhall St., Preston.
ROBERT LUND.