Improvements in Apparatus for Obtaining Reciprocating Motion from Electric Currents. Applicable to the Operation of Electric Bells, Hammers, Caulking Tools or the like.
Year: 1889

page_text: Date of Application, 20th Aug., 1889
Complete Specification Left, 20th May, 1890-Accepted, 28th June, 1890
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PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Obtaining Reciprocating Motion
from Electric Currents. Applicable to the Operation of Electric
Bells, Hammers, Caulking Tools or the like.
1, THOMAS PARKER of the firm of Elwell Parker & Co. Limited of Wolverhampton
in the County of Stafford Electrician do hereby declare the nature of this Invention
io be as follows: -
My Invention has for its object to provide apparatus for obtaining reciprocating
motion for ringing bells or operating hammers, caulking tools or the like in such a
manner that clean and efficient contacts are maintained and sparking is prevented
the apparatus being very efficient in operation and also simple in construction.
According to myÏnvention I include in the operatingcircuit a pair of coils or their
equivalents by which the hammer or part to be reciprocated is moved alternately in
opposite directions the said hammer or part acting upon a switch with scraping or
rubbing contacts so arranged that after the reciprocating hammer or moving part is
attractedin one direction it causes the switch to make contacts to break the circuit to
the coil which attracted the hammer or movingpart and complete the circuit through
the opposite coil and so on during the operation of the device.
I will describe more particularly the application of my Invention to a bell from
which its other applications will also be understood and it will also be evident that the
precise details are capable of considerable variation.
The mechanism is preferably enclosed by the gong of the bell. It consists of two
solenoid coils in branches of the electric circuit. These branches cross over and
terminate respectively in contact pieces situated in proximity to one contact piece
connected to the circuit.
The switch or make and break device is always in contact with the last named
contact piece but as it slides thereover it alternately makes contact with the one and
the other of the first named contacts--the switch being so constructed that one
contact is not left until after the other is made. The hammer or reciprocating device
consists of a soft iron bar with its two ends entering the coils one end entering one
coil and the other end entering the other coil. It has a projection on it operating on
the switch to move it as aforesaidso that it completes the circuit first throughone coil
and then through the other and so reciprocates the hammer or moving part.
Dated this 20th day of August 1889
J. H. JOHNSON & Co.,
47. Lincoln's Inn Fields, London, W.C.. Agents.
COMPLETE SPECIFICATION.
Improvements in Apparatus for Obtaining Reciprocating Motion
from Electric Currents, Applicable to the Operation of Electric
Bells, Hammers, Caulking Tools or the like.
I THOMAS PARKER of the Electric Construction Corporation Limited of Wolver-
hampton in the County of Stafford Electrician do hereby declare the nature of this
Invention and inwhat manner the same is to beperformed to be particularlydescribed
and ascertained in and by the following statement:
My Invention has for its object to provide apparatus for obtaining reciprocating
motion for ringing bells, or operating hammers caulking tools, or the like, in such a
manner that clean and efficient contacts are maintained and sparkingis prevented the
apparatus being very efficient in operation and also simple in construction.
According to my Juvention T include in the operatingcircuit a pair of coils or their

page_text: equivalents by which the hammer or part to be reciprocated is moved alternately in
opposite directions the said hammer or part acting upon a switch preferably with
scraping or rubbing contacts so arranged that after the reciprocating hammer or
moving part is attracted in one direction it causes the switch to make contacts to
break the circuit to the coil which attracted the hammer or movingpart and complete
the circuit through the opposite coil and so on during the operation of the device.
I will describe my Invention more particularlywith reference to the accompanying
drawings which shew the application of my Invention to a bell from which its other
applications will also be understood and it will also be evident that the precise details
are capable of considerable variation. The two figures of the drawing shew views of
a bell at right angles to each other with an arrangement according to my Invention
applied.
The mechanism is preferably enclosed by the gong G of the bell. It consists
of two solenoid coils B B in branches of the electric circuit. These branches cross
over and terminate respectively in contact pieces situated in proximity to one
contact piece el connected to the circuit. The switch or make-and-break device D is
always in contact with the last named contact piece (1) but as it slides thereover it
alternately makes contact with the oneand the other of the first namedcontacts(e or c¹).
The switch should be so constructedthat one contact is not left until after the other is
made. The hammer or reciprocating device consists of a soft iron bar A with its two
ends entering the coils B B one end entering one coil and the other end entering the
other coil. It has a projection E on it operating on the switch D to move it, as
aforesaid, so that it completes the circuit first through one coil and then through the
other andso reciprocates thehammer or movingpari. / represents the externalcircuit c
the battery and e³ the contact button.
It will be readilyunderstood from the foregoing description howthe Invention can
be applied to obtaining reciprocating movement generally such as for hammers,
caulking tools, rock drills or the like.
Having now particularly described and ascertained the nature of my said Inven-
tion and in what manner the same is to be performed I declare that what I
claim is:
1. In apparatus for obtaining reciprocating motion from electric currents, the
combination of a body,free to reciprocate, and coils throughwhich an electric current
is passed alternately by switching apparatus operated by the reciprocating body
substantially as hereinbefore described.
2. In apparatus for obtaining reciprocating motion from electric currents, the
combination of a hody, free to reciprocate, and coils throughwhich an electric current
is passed alternately by a switch sliding upon.or over, contact pieces and operated by
the reciprocating body substantially as herein before described.
3. The arrangement and combination of parts constituting an electric bell as
herein before described and illustrated in the accompanying drawings.
Dated this with a 1000
J. H. JOHNSON & Co.,
Agents.