Improvements in Means for Starting Explosion Motors.
Year: 1899

page_text: PROVISIONAL DIE
Improvements in Means for Starting Explosion Motors.
I, ERNEST ESTCOURT, of 23, Compayne Gardens, South Hampstead, in the
County of London, no occupation, do hereby declare the nature of this invention
to be as follows:-
The object of this invention is to provide means for starting explosion motors
especially such as are used for driving motor cars.
According to this invention I fit the driving shaft of the motor with a toothed
or sprocket wheel which is engaged by a toothed rack or chain.
The toothed rack or the chain is normally out of gear with the toothed or
sprocket wheel and is connected to a suitable spring. The rack or chain is
brought into gear by a pull on a handle or other suitable gripping device located
in a convenient place and a further pull thereon causes the rack or chain to
rotate the toothed or sprocket wheel and the driving shaft to which it is con-
nected. When the gripping device is released the spring returns the parts to
their normal position. In some cases the teeth on the wheel and on the rack
may be angled like those on circular saw, so that on the backward movement
the teeth on the rack may clear those on the wheel.
1000
F. W. GOLBY,
36, Chancery Lane, London, W.C.,
Patent Agent for the Applicant.
I, ERNEST ESTCOURT, of 23, Compayne Gardens, South Hampstead, in the
County of London, no occupation, do hereby declare the nature of this invention
to be as follows:-
The object of this invention is to provide means for starting explosion motors
especially such as are used for driving motor cars.
According to this invention I fit the driving shaft of the motor with a toothed
or sprocket wheel which is engaged by a toothed rack or chain.
The toothed rack or chain is normally out of gear with the toothed or
sprocket wheel and is connected to a suitable spring. The rack or chain is
brought into gear by a pull on a handle or other suitable gripping device located
in a convenient place and a further pull thereon causes the rack or chain to
rotate the toothed or sprocket wheel and the driving shaft to which it is con-

page_text: nected. When the gripping device is released the spring returns the parts to
their normal position. The teeth on the wheel are angled like those on a
circular saw, so that on the backward movement the teeth on the rack or chain
may clear those on the wheel.
In the accompanying drawings I have shown motor starting gear mechanism
constructed according to my invention fitted with a chain gearing into a sprocket
wheel having angled teeth. This is the form which I prefer to use, but obviously
a rack may be used instead of the chain and the spring may be of any description
either steel, spiral or straight or of rubber.
Fig. 1 is a sectional elevation showing the driving shaft A of a motor with
the gear fitted thereon and Fig. 2 is a plan of Fig. 1; the same parts being
lettered to correspond in both figures.
In these views A is the motor shaft, B the sprocket wheel fast thereon and C
the sprocket chain gearing with the wheel B. One end of the chain C is
fastened to a spring drum D the tendency of which is to keep the chain wound
up on the drum, and the other end of said chain is secured to a suitable handle E
placed in any any convenient position on the car. The end of the chain C
may be secured direct to the handle E if desired, but preferably it is connected,
as shown in the drawings, to a double wire, cord or other flexible connection F,
which is passed over suitable guides, rollers or grooved pullies G and connected
to the handle E.
The chain C is provided with a projection or projections H, preferably in the
form of an elongated link-connecting roller as shown, which projections, when
the spring D is acting to wind up the chain, will abut against a fixed stop J
and thus prevent the drum from taking up any more of the chain. The stop J is
preferably in the form of a fork as shown in Fig. 2.
serving as a guide for the chain, and to this plate K the stop J may con-
K is a fixed slotted plate
veniently be secured or it may be formed integrally therewith.
A pull on the handle E will draw up the slack of the chain C and bring it
into gear with the wheel B, and a further pull will cause the chain to rotate the
wheel thereby rotating the motor driving shaft A.
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:-
Starting gear for explosion motors comprising a toothed or sprocket wheel
on the motor driving shaft, and a rack or chain gearing with said wheel and
connected at one end to a suitable spring and at the other to an operative handle,
substantially as described.
ay of October 1899.
F. W. GOLBY,
Patent Agent, 36, Chancery Lane, London, W.C.,
Agent for the Applicant.