Improvements in Chain Guards or Gear Cases and Lubricators for Velocipedes.
Year: 1893

page_text: Date of Application, 10th June, 1893
Complete Specification Left, 9th Mar., 1894-Accepted, 14th Apr., 1894
PROVISIONAL SPECIFICATION.
Improvements in Chain Guards or Gear Cases and Lubricators
for Velocipedes.
I, JOHN BOULTBEE BROOKS, of Criterion Works, Great Charles Street,
Birmingham, in the County of Warwick, Manufacturer, do hereby declare the
nature of this invention to be as follows:-
The object of the invention is to provide a simple form of chain guard which
may readily be detached from the velocipede; & a lubricator by which the flow of
oil may be started or stopped at pleasure.
The improvements in the chain guard consist in the construction & arrangement
of the stays & clips for connecting it to the velocipede.
The frame of the chain guard is made of steel of curved section, shaped to
encompass the chain at a suitable distance from it; & has one end detachable so as
to admit of its being placed round the chain. This frame is secured to that bar or
tube of the velocipede which traverses the greater diameter of the chain, by two
stays, each of which has a clip which grips the bar or tube. Each of the clips is
formed of two parts, one of which has a flat side to fit against the stay, and a
curved side to fit the tube: the other part fitting round the other side of the tube.
The clip is tightened on the tube, and also attached to the stay by two screws
which pass through the stay & also through both parts of the clip.
The stays are so fixed to the frame that when in position on the velocipede, both
of them are on the outer side of the chain, i.e. that side of the chain which is away
from the velocipede, so that when the clips are unfastened, & the end of the frame
detached, the frame comes right away. The screws which hold the clips are also
approached from the outer side.
So that the stays may be placed to the outer side of the chain, one (or both) of.
the stays is curved or bent into the required shape to bring the clips into the
requisite position for gripping the tube, which slants across the direction of the
chain.
The frame work is enclosed by a cover of enamelled leather or other suitable
material, made to fit, and laced on the frame in the usual way.
The lubricator consists of a covered cup provided with a suitable screw under-
neath for attachment. Down the centre of the cup is fixed a tube which projects
through the cover, and is pierced to admit oil from the cup.
The bottom of the
tube terminates in a conical seat, the lower end of which is continued by a fine hole
through which the oil is to pass.
The upper end of the tube is covered by a screw cap, through which passes an
elongated plug which is pointed at its lower end to fit the conical seat at the
bottom of the tube, and so form a valve. This plug is forced downwards by a
spring which bears against a projection on the plug, and against the cap of the
tube. The upper face of the cap has two transverse slots cut in it,-one deeper
than the other; and the upper end of the plug has a cross-piece at the top,-T form,
so that when the plug is turned for the cross-piece to drop in the deeper slot, it is
forced down by the spring, and the flow of oil stopped; when the plug is raised by
he fingers and turned so that the cross-head falls in the shallow slot, the oil is
allowed to flow again.
Dated this Ninth day of June 1893

page_text: שעשע
DE BUITIVATION.
Improvements in Chain Guards or Gear Cases and Lubricators
for Velocipedes.
I, JOHN BOULTBEE BROOKS, of Great Charles Street, in the City of
Birmingham, Manufacturer 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 chain guards or gear cases for velocipedes and also to
lubricators therefor and has for its object, first, a simple form of chain guard which
may readily be detached from a velocipede and secondly a lubricator by which the
flow of oil may be started or stopped at pleasure. The improvements in the chain
guards consist in the construction and arrangement of the stays and clips for
connecting it to the velocipede.
The frame of the chain guard is made preferably of thin sheet metal of a
channelled cross section, shaped to encompass the chain at a suitable distance from
it, and has one end detachable so as to admit of its being placed round the chain
and chain wheels.
This frame is secured to that framing member of velocipede which traverses the
greater diameter of the chain, by two stays, each of which has a clip which grips
the said member. The clip is tightened on the tube and also attached to the stay
by two screws which pass through the stay and also through both parts of the clip.
The stays are so fixed to the frame of the cover that when in position on a
velocipede both of them are on the outer side of the chain i.e. that side of the chain
which is furthest away from the velocipede, so that when the clips are unfastened
and the end of frame detached, the said frame comes right away.
The screws
which hold the clips are also approached from the outer side.
The frame work is enclosed by a cover of enamelled leather or other suitable
material, made to fit and laced on the frame in the usual way.
The lubricator consists of a covered cup provided with a suitable screw end for
attachment. Proceeding down the centre of the cup is a rising and falling which
projects through the cover. The bottom of the cup terminates in a conical seat the
lower end of which is continued by a fine hole through which oil passes. The
upper end of the cup is covered by a cap through which the rising and falling stalk
which is pointed at its lower end to fit the conical seat of the bottom of the tube,
and so form a valve, passes. This stalk is forced downwards by a spring which
bears against a collar upon it and the underside of the cap of the cup.
face of a neck rising from the cap has two opposite and transverse slots or sinkings
cut in it, one pair being deeper than the other whilst the upper end of the stalk has
a cross head so that when the said stalk is turned for the cross head to drop in the
deeper slot, it is forced down by the spring and the flow of oil stopped, when the
stalk is raised by the fingers and turned so that the cross head falls in the shallow
slot the oil is allowed to flow again.
The upper
Figure 1 of the accompanying drawing represents partly in elevation and partly
in vertical section, a velocipede chain guard or a gear case constructed according
to or provided with improvements made according to my invention.
The said view represents the metallic skeleton of the guard or case divested of
its leather or other laced-on cover.
Figure 2 represents a longitudinal vertical section of the same upon the dotted
lines A B Figure 1 showing the dispositions of the stays or cross framing ties
for the carrying of the clips or brackets which embrace or clip that frame

page_text: member of the machine which runs from the bottom bracket to the bearing of the
hind wheel.
Figure 3 represents a cross section upon the dotted lines C D Figure 1, looking
towards the rear or detachable part of the case.
Figure 4 represents a safety bicycle having a gear case as shown in Figure 1.
Figure 5 represents an elevation of the drip lubricator showing the same
closed.
Figure 6 is a vertical section of the said lubricator showing the same open or
its valve lifted, whilst Figure 7 is a topside plan of Figure 5.
:
In the chain guard or gear case, a is a fixed open frame, made of thin sheet
steel or other metal preferably of a channelled cross section, adapted to length-
wise embrace a driving chain and having its rear part fitted with a detachable :
end a', which fits and slides within turned-over edges a³, and when drawn out or
separated from the other part and the screws (as hereinafter described) removed,
admits of the gear case being taken from off and from over the chain and chain
wheels of a machine.
Crossing the skeleton frame part a, of the guard or case are two set-forward
stays c, c with their ends united to the top and bottom front walls of the said
embracing frame, whilst their inner faces are respectively fitted with attachable
and detachable clips d, d', each made up of sectional parts d², d, through the stand
or rest section d³, of which, screw pins 4, pass and also take through holes c²,
through the stays c, c', whilst their screwed ends d, screw into screwed holes de,
through the bridge-shaped clips 2, d³, so that by screwing up the said pins, the
sectional clip parts are drawn tightly upon the frame member b, whereby the
guard or case is connected to the clip brackets and the clip brackets to a
machine.
From this it will be seen that the screws are approached from the outer side
of the guard or case when the same is stripped or divested of its laces covering,
and when the screws have been removed, the framing with its cognate parts, after
the removal of the detachable end, can be brought away from off the chain and
chain wheels.
The lubricator, which is applicable to gear cases and the lubricating parts of
velocipedes generally, consists of a shell body cup e, with an outside screwed and
hollow neck or nozzle e', having an outlet and valve seating e2, wherein the conical
end f, of a valve stalk f, directed down the middle of the casing, seats itself and
closes the throat to the said outlet when the stalk is down for the closing of the
lubricator.
This stalk proceeds outwardly through a central piercing g', of the fixed cap or
cover 9, of the lubricator, and through a hole in the neck ¹, of a rotatory cap h,
which has a filling hole or piercing 2, through it, and when the said cap is rotated,
the said hole is brought coincident with a like hole 92, made through the top of
the fixed cap g.
The rotation of the said cap h, is limited by a fixed stud i, carried
by it taking through a curved slot g³, formed through the said cap g.
The stalk is terminated by a cross head f, which rests (as in Figures 6 and 7)
crosswise upon the sunken top h³, of the neck ', when the valve stalk is required to
be held up for opening the valve so as to allow lubricant to flow, but when the
lubricator is required to be closed, then the cross head is turned and made to come
in front of the opposite cross gaps h, when the spring e, located between the upper
side of the collar f³, and the under side of the fixed cap g, forces the stem down-
wards thereby taking the cross head into the gaps and the coned end into the
valve seating e², and thereby closes the lubricator.
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 :-
:-
First. In gear cases or chain guards for velocipedes, fitting or locating the
stays for the carrying of the clips or brackets for securing the case or the frame of

page_text: a case to the member of a machine, upon the outer side of the said frame so
that the connection means for securing the said stays to the said clips are
approached from the front, substantially as described and set forth in Figures 1 to 4.
Secondly. In gear cases or chain guards for velocipedes, the combination with
the outer framing a, of set-forward stays c, c¹ having attachable and detachable
brackets d, d² and loose pins d', substantially as and for the purpose as described
and set forth in Figures 1 to 4.
Thirdly. In lubricators for velocipedes, the means herein described for keeping
open or keeping closed the valve, substantially as set forth in Figures 5, 6
and 7.
Fourthly. In lubricators for velocipedes, the combination with the cross head f
of the valve stalk f, of a neck ', sunken and gapped at h³, h, substantially as and
for the purpose as described and set forth in Figures 5, 6 and 7.
Dated this 8th day of March 1894
JOHN BOULTBEE BROOKS,
By Henry Skerrett,
6, Livery Street, Birmingham, Agent for Applicant.