Improvements in Adjustable Reflectors.
Year: 1893

page_text: Date of Application, 31st Oct., 1893-Accepted, 23rd Dec., 1893
COMPLETE SPECIFICATION.
Improvements in Adjustable Reflectors.
I, PETER WILHELM ADOLF PAASCH, of 18 Henriettenallee, Hamburg, in the
German Empire, 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 apparatus enabling dwellers in houses to observe all
that occurs in the street or road, from any part or storey of the building, at will,
without the necessity of putting their heads out of the windows; and the circum-
stance which particularly enhances the value of the invention is that its object is
accomplished by one single reflector or mirror only, instead of, by the employ-
ment of a number of mirrors adjustable in relation to each other; such single
mirror being adapted to assume any position which the attainment of its purpose
may require.
The invention will be best understood by reference to the accompanying drawings,
in which
Figure 1 is a plan.
Figure 2 a longitudinal section of the mirror adjusting mechanism.
Figures 3 and 4 are detail views, and
Figure 5 a section on line xx, (Figure 1), the arrangement being viewed in the
direction of the arrow y.
C
Through the window frame a is passed a guiding tube or sleeve b, to which is
secured the supporting frame c of the reflecting mirror d. The attachment of the
mirror d to the said supporting frame c is effected by means of two bolts or pins e,
on which the mirror is adapted to turn. As, according to the distance at which
the object observed may be from the point of observation, it is necessary to vary
the angle of inclination of the mirror d, a bevel wheel is attached to the edge
of the mirror. With this bevel wheel engages a small wheel or pinion g mounted
upon the spindle 4, which extends through the guiding tube or sleeve into the
apartment, there, on emerging from the said sleeve, it terminates in a handle i.
Provided the sleeve or tube is stationary, it will be readily understood that it
is only necessary to turn the handle i in the required direction and to the desired
extent, to change accordingly the position or angle of the mirror, thereby adjusting
it in the manner best suited to the observation of a given point. Now, to retain
the said tube b reliably in position, it is provided, at the end which projects into
the interior of the house, with a square (Figures 2 and 4), to which a thumb nut
or key k is fitted. This key, moreover, carries pins such as 1 (Figure 2) which are
constantly forced, by a spring m, into corresponding recesses provided in the
fitting n, whereby the tube or sleeve b is made stationary throughout. In addition
to this, however, the said tube is passed through another bracket or carrier o on the
outside, which assists in supporting it.
Supposing now it is desired to place the mirror at right angles to the direction
of the motion produced by the bevel gearing g and f. It is then only necessary to
raise the key or nut k and thereby to remove the pins 1 from the recesses n. When
this is done, the tube or sleeve band with it the mirror may readily be turned as
required; and when the mirror has thus been properly adjusted, the key or nut k
may be locked in position again by allowing its pins to re-enter the openings in the
fitting n (Figure 3).

page_text: 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 :-
An improvement in adjustable reflectors, consisting of an arrangement in which
one reflecting mirror only is enabled by adequately disposed mechanism, to move
or shift in two directions at right angles to each other, for the purpose of permitting
any given point or object, whatever its position, to be viewed from any point of
observation which it may be desirable to elect, substantially as hereinbefore
described.
Dated this 31st day of October 1893
MARKS & CLERK,
18, Southampton Buildings, Chancery Lane, London, W.C.,
Agents for the Applicant.