Year: 1887

page_text: I, HERBERT JOHN HADDAN of 67, Strand in the County of Middlesex, Civil
Engineer, 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 gas motors and consists in the novel construction of
the cylinder, the improved devices for the regulation, introduction and evacuation of
the gas, the automatic lubrication of the piston, the improved arrangement for
electrically igniting the gas in the cylinder; also the improved electro-magnet likewise
for the purpose of igniting the gas in the cylinder, and further in the general con-
struction of the motor as shown by Figs. 1 to 9 of the accompanying drawings.
Fig. 1 is a front elevation and
Fig. 2 a plan of the motor.
Fig. 3a section along line CD, Fig. 2.
Fig. 4 a section along line A. B.
Fig. 5 an end view.
Fig. 6 also a rear view of the cylinder.
Fig. 7 detail section of the bobbin of the electro induction apparatus.
Fig. 8 a longitudinal section of the cylinder.
Fig. 9 end view showing the electro-magnet etc.
As shown in Fig. 3 that part of the cylinder in which the piston moves, and also
that portion, on which the valve box Z is situated, are provided with cavities X X X,
into which water is introduced by a pump actuated by the motor, thereby keeping the
front portion of the cylinder and the valve box from being overheated. The rear
part S of the cylinder, forming a neck, in which the explosions take place, can,
required, be covered with a bad conductor of heat for the purpose of maintaining
therein a great heat for giving the gas introduced into the same, the greatest possible
expansive power.
if

page_text: The same purpose may be attained, as shown in Figs. 8 and 9, by surrounding the
rear part of the cylinder with a second casing by providing it with cavities S¹ S',
which are filled with sand or any other bad conductor of heat.
I may also use the cavities S'S' for the evacuation of the burned gas of the cylinder,
which, coming from the valve box Z, passes through S1 S¹ and leaves at V) Fig. 9
after having performed its work in the cylinder. As shown by Figs. 1 and 2, the
motor shaft A carries a pinion B with inclined teeth, gearing into a similar tooth
wheel B₁ fixed on a shaft A revolving in bearings CC Fig. 1 perpendicularly to the
motor shaft; on this shaft A' are fastened the cams D E UG, the movements of
which are regulated as follows:
The cam D, Fig. 1, is provided with a slot, in which runs a roller V, which gives a
regular reciprocating motion to a lever D', in the extremity of which slides vertically
a pin H, to which a movement regulating its position in the lever D' is given by the
governor K, causing it to strike the rod I of the valve J, Fig. 4, for giving passage
to the gas which flows subsequently through the tubes R R into the valve box Z and
thence into the cylinder, until the motor has attained its maximum speed.
The cam E, Fig. 1, by its rotary motion, causes the rod of the valve E¹ in the valve
box Z to be lifted and controls the introduction of gas and air into the cylinder. The
cam G, by the same rotary motion, causes the rod of the valve G' to be raised, which is
placed by the side of the valve E' in the same valve box Z, and serves for the evacua
tion of the burned gases. Below each of these valve rods is placed a spring R,
Fig. 3, allowing the valve to be raised perpendicularly.
The automatic lubrication of the piston is arranged as follows, Figs. 8 and 9. N¹ is
the receptacle containing the oil, N" a tube having at its upper extremity a notch and
conducting the oil into the cylinder.
A small brush O¹ fixed to an endless chain O", dips into the oil; this chain, by
turning on a pulley P conducts the brush before the notch of the tube, and, by
friction against the latter leaves therein the necessary oil. For the purpose of
maintaining a continual tension of this chain, I have journalled in the bottom of the
lubricator à pulley P¹. The movement for this chain is preferably imparted to a
pulley W fixed to the shaft of the governor, the said pulley is geared with a
second pulley W on the shaft of the pulley P. When the governor stops, the
lubrication also ceases.
I have likewise placed on the shaft A¹ a pulley T, which actuates a pump T¹,
Figs. 1 and 2, which conducts the water into the cavities XXX, (Fig. 3) of the
cylinder and serves to cool the same. The electric ignition of the gas in the cylinder
is attained in the following manner:
An induction current passes to the post Q Fig. 5, which is placed behind the
cylinder, subsequently through the metal plate b, which the cam U on the shaft A
lifts, so as to come in contact with the screw c (according as this screw is lengthened
or shortened, the ignition is advanced or retarded). The current passes through
screw c and wire d to the igniter e, returns through the wire f
The circuit being closed by the cam U the spark ignites the gas contained in the
cylinder. As shown by Figs. 6 and 7 the ignition of the gas in the cylinder may be
attained by means of an improved electro-magnet, constructed as follows: It consists
of a bundle of magnets Q the number of which may be increased or decreased
according as required. They are furnished at their extremities with poles ¹ of soft
iron, and are fixed to the bed plate g¹ by the bronze brackets f. Between the poles
revolves a bobbin c¹ having two poles united with each other by a core of soft iron,
on which the induction wire is coiled.
This bobbin is mounted on a shaft e¹. When the machine is at rest, the poles of the
bobbin are attracted by the poles of the magnets. If at this moment, the bobbin is
caused to undergo au abrupt rotary displacement an induction current is set up in the
coil of the bobbin which gives the spark necessary for the ignition of the gas contained
in the cylinder.
The bobbin is held in a frame-work of bronze or any other material which is as
little magnetic as possible, and supported by two bronze standards d' in which it

page_text: ''
moves and the current is conducted to the cylinder through the spring L, which also
serves for actuating the shaft G" Fig. 8, through the crank M, this shaft is provided
with a contact which is withdrawn from contact with the bronze piece K by the
movement of the bobbin e. By this device a spark is produced in the interior of the
cylinder between the contacts and K' which spark ignites the gas contained in
the cylinder. The disc U' with catch a serves to give the periodical displacement of
the bobbin and of the crank M by means of the rod B with catch as shown in
Fig. 9, or by operating direct on a crank attached to the shaft of the bobbin as in
Fig. 6.
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performed, I declare that what I claim is :—
In gas engines:
1. A cylinder having an extension to the rearward forming the explosion chamber,
the cylinder being covered with a cold water jacket, the extension being jacketted
with a non-conductor of heat or with a space through which the waste gases from
the said explosion chamber may be passed, substantially as and for the purpose set
forth.
2. The reciprocating lever D₁ having the pin H controlled by the governor and
operating the slide valve I J substantially as and for the purpose set forth.
3. The shaft A having the cams D, E, G, U, operating the lever D', valve E
valve G and electric exploding device, substantially as and for the purpose set forth.
4. The combination with the cylinder of an automatic lubricator, consisting of
receptacle N1, containing tube P with inclined or notched upper extremity and endless
hand O with brush O revolving on pulley N substantially as and for the
forth.
purpose set
5. The exploding device consisting of cam U on shaft A¹ operating contact b, c,
substantially as and for the purpose set forth.
6. The explosive device consisting of magnets Q1 rotary bobbin c¹ operated by
cam V, said motion causing a current to be inducted in said bobbin, substantially as
and for the purpose set forth.
7. The combination with the magnets Q
crank M, operating crank M and shaft G
and for the purpose set forth.
and bobbin c', of spring L, rod M" and
provided with contact r, substantially as
H. J. HADDAN.
By Herbert & Co.,
67, Strand, W.C.,
Agents to Applicant.