Improvements in Chains for Driving Gear Conveying Power and the like.
Year: 1899

page_text: Date of Application, 28th Feb., 1899
Complete Specification Left, 12th July, 1899-Accepted, 12th Aug., 1899
PROVISIONAL SPECIFICATION.
Improvements in Chains for Driving Gear Conveying Power and
the like.
I, THEODORE PRINZ, of 1, Arcola Street, Stoke Newington, London, Mechanical
Engineer, do hereby declare the nature of this invention to be as follows:-
The object of this invention is to make a chain for driving cycles motor cars
and the like and for conveying power generally, which is simple in construction,
of great strength, yet capable of being disconnected, shortened or lengthened
very easily.
For this purpose, the chain is made of links, some of which, and preferably,
each alternate link, is an open link. The links are made of hard steel or other
suitable metal and of any shape suitable for the work for which they are
intended.
The chains for cycles and motor cars are preferably made with a somewhat
D-shaped link open in the back of the D connected by flat closed links in such
a way that the strain on the chain is direct along the front or straight side of
the D.
Any of the open links may be so shaped in the opening that such opening may
be closed by a sliding wedge or other simple contrivance.
If preferred all the links, or only one or a few may be open links.
S. S. BROMHEAD,
Agent for Applicant,
171, Queen Victoria Street, London, E.C.
Improvements in Chains for Driving Gear Conveying Power and
the like.
I, THEODORE PRINZ, of '1, Arcola Street, Stoke Newington, London, Mechanical
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:-
The object of this invention is to make a chain for driving cycles, motor cars
and the like, and for conveying power generally, which is simple in construction,
of great strength, yet capable of being disconnected, shortened or lengthened
very easily.
For this purpose, the chain is made of links some of which, and preferably
each alternate link, is an open link. The links are made of hard steel or other

page_text: suitable metal and of any shape suitable for the work for which they are
intended.
The chains for cycles and motor cars are preferably made with a somewhat
D-shaped link open in the back of the D, connected by flat closed links in such
a way that the strain on the chain is direct along the front or straight side of
the D.
Any of the open links may be so shaped in the opening that such opening may
be closed by a sliding wedge or other simple contrivance.
If preferred, all the links, or only one or a few may be open links.
I will now describe my invention with reference to the accompanying draw-
ings, in which,
Fig. 1 shews an elevation of a sprocket wheel, adapted to be driven by the
improved chain.
'
Fig. 2 shews an enlarged elevation and plan of one of the D-shaped links.
Fig. 3 shews an enlarged elevation partly in section, and a plan view of one
of the open links which connect the D-shaped links together.
Fig. 4 shews a method of closing the opening in the outer portions of the
D-shaped links.
a is the sprocket wheel, the teeth a of which engage open links b. The
recesses a² between the teeth a', receive and engage with the D-shaped links c.
The inside faces of the ends of the links bare splayed off at 61, Fig. 3 to fit the
sloped portions of the links c. The outer portions of the links may be left
open as shewn in Fig. 1, or closed by a hinged piece d as shewn in Fig. 2, or the
piece may be made removable by any suitable device.
The closing piece-d-shewn-in-Fig. 2-is kept closed by the spring d¹.
Referring to Fig. 4, e is a wedge which engages with a similarly wedge-
shaped opening left in the outer portion of the links c.
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:-
(1). In an improved chain for driving cycles, or otherwise transmitting power,
the special D-shaped links, the outer portions of same being open, or if pre-
ferred, capable of being closed by any suitable device; substantially as shewn and
described.
(2). In an improved chain, the combination of the special D-shaped links c,
with the open links b, the inside faces of the ends of the latter being splayed,
substantially as shewn and described.
(3). An improved chain consisting of alternate open and closed links, or with
a larger number of closed, than open links, substantially as shewn and described.
SCOT GTO Con
пат ОТПА
S. S. BROMHEAD,
Agent for Applicant,
33, Cannon Street, London, E.C.
S. S. BROMHEAD,
Agent for Applicant,
33, Cannon Street, London, E.C.