Improvements connected with Micrometer and similar Gauges.
Year: 1899

page_text: Date of Application, 5th Oct., 1899
Complete Specification Left, 4th July, 1900-Accepted, 25th Aug., 1900
PROVISIONAL SPECIFICATION.
Improvements connected with Micrometer and similar Gauges.
We, HENRY BROOKER and ALFRED JAMES BAXTER, both of 31-35, Goswell
Road, County of London, Engineers, do hereby declare the nature of this inven-
tion to be as follows:-
This invention consists in so arranging a gauge that it not only shews the
measurement or size in decimals of a wire or sheet metal or other material but
also shows the size or diameter of the same in several forms of gauge known as
the Birmingham, Standard, Stubbs and other gauges. This we effect by con-
structing the micrometer in the following manner.
A screw or worm is cut or placed upon the spindle which has several threads
geared into a disc or wheel placed so that the turning of the spindle turns the
disc or wheel which is engraved or marked with figures denoting the sizes in
the various gauges and decimals of same at the same time a point attached to the
framework points to lines forming a vernier on the disc or wheel or wheels and
which may be covered on each side by side plates with slots or holes through
which the above mentioned figures are seen.
Instead of the above arrangement of wheels or discs a rack or bar sliding along
can be arranged to serve the same purpose
H. GARDNER,
Patent Agent. 166, Fleet Street, London,
Agent for 'the said H. Brooker and A. J. Baxter.
Improvements connected with Micrometer and similar Gauges.
We, HENRY BROOKER and ALFRED JAMES BAXTER, both of 31-35, Goswell
Road, County of London, Engineers, do hereby declare the nature of this inven-
tion and in what manner the same is to be performed to be particularly de-
scribed and ascertained in and by the following statement:-
This invention consists in so arranging a gauge that it not only shews the
measurement or size in decimals of a wire or sheet metal or other material but
also shows the size or diameter of the same in several forms of gauge known as
the Birmingham, Standard, Stubbs and other gauges. This we effect by con
structing the micrometer in the following manner.
A screw or worm is cut or placed upon the spindle which has several threads
geared into a disc or wheel placed so that the turning of the spindle turns the
disc or wheel which is engraved or marked with figures denoting the sizes in

page_text: the various gauges and decimals of same, at the same time, a point attached to the
framework points to lines forming a vernier on the disc or wheel or wheels and
which may be covered on each side by side plates with slots or holes through
which the above mentioned figures are seen.
Instead of the above arrangement of wheels or discs a rack or bar sliding along
can be arranged to serve the same purpose.
The accompanying drawings illustrate the invention, Figure 1 being an eleva-
tion of one side of a micrometer gauge, and Figure 2 an elevation showing
the other side; Figure 3 is a back end view, and Figures 4 and 5 are edge and
face views of the toothed disc or wheel.
A, is the spindle mounted in screw bearing B which is carried by frame C with
its butt piece in the usual manner. E, is an accurately gauged micrometer
screw thread near the back end of the spindle A and gearing into a toothed
disc which revolves on an axle pin G supported by extension arms H, these
being screwed or otherwise fixed to the frame C. These extension arms also sup-
port side plates I enclosing the dise which is graduated or marked with
decimal measurements, also with the various sizes of gauge known as the Bir-
mingham, Standard, Stubbs, and others, these showing through slots in the
enclosing side plates on each side, as at J and K. The graduated disc F is further
provided with a vernier scale showing through the slot, as at L, a pointer M
facilitating precision of reading or adjusting same.
It is obvious that a rack or sliding bar operated by the micrometer screw E
and marked with the various gauges, measurements, and vernier scale may be
substituted for the revolving disc above described.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that
what we claim is:-
1. In micrometer and similar gauges, the combination of a micrometer screw
or worm on the spindle, gearing with a toothed wheel or disc mounted on
extension arms of the gauge frame, said wheel being marked with indications
of various gauge sizes, and with decimals of same, also with a vernier scale for
precision of adjustment, as above described and substantially as shown in the
drawings.
2. In micrometer and similar gauges constructed with worm and toothed
disc gearing as set forth in Claim 1, the combination therewith of enclosing
plates for the graduated revolving dise fixed to the gauge frame and having
sight openings for reading the respective indications on the disc appearing in
the openings or slots, as above described and substantially as shown.
3. In the micrometer gauge of the kind described in Claim 1, the modified
arrangement of rack or sliding bar in lieu of the toothed disc, as herein set
forth.
R. CORE GARDNER,
Patent Agent, 166, Fleet Street, London,
Agent for the said Henry Brooker and Alfred James Baxter.