IMPROVEMENTS IN APPARATUS FOR HOLDING AND REGULATING THE POSITION OF LAMP SHADES OR REFLECTORS
Year: 1865

page_text: PROVISIONAL SPECIFICATION left by William Clark at the Office of
the Commissioners of Patents, with his Petition, on the 18th March
1865. A communication from abroad by Guillaume Pascal, Professor
at the Ecole Centrale de Lyon, of 29, Boulevart St. Martin, Paris.
I, WILLIAM CLARK, of 53, Chancery Lane, in the County of Middlesex,
Engineer and Patent Agent, do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN APPARATUS FOR HOLDING AND REGULATING THE
POSITION OF LAMP SHADES OR REFLECTORS," to be as follows:-
This Invention relates to an improved apparatus for supporting the reflectors
of lamps, by the aid of which these reflectors may be inclined in such manner
as to direct the light to one side or the other.
The apparatus consists of a zone or section of a sphere, which is made
hollow and grooved on its exterior surface, being fixed to the chimney of the
candle lamp or gas burner on which it is applied, an oscillating ring is also
mounted in axes at about the centre line of this zone to carry the reflector
or shade, to which ring are fixed the parts for maintaining it in its relative
position with the zone for producing the inclination of the reflector. The
annexed Drawing represents several arrangements of apparatus. according to
this Invention.
Figs. 1 and 2 show vertical and horizontal views of a first arrangement;
A, zone or section of a hollow sphere grooved on its exterior surface, and fixed
to the chimney of the burner by means of strips e. G, ring, oscillating on

page_text: centres a, a, fixed to zone A. The shade or reflector is fixed in the inclined
position by means of pinions c gearing in the grooves of A, being held
therein by friction sufficient to prevent its turning.
Figs. 3 and 4 show vertical and horizontal views of a second, arrangement,
in which the grooved zone is replaced by a ring A, furnished with one or
two grooved segments B, in which gear the pinions c for the purpose of pro-
ducing the inclination of the reflector. This apparatus is fixed to the chimney
of the lamp by means of flexible strips e, e. The ring G also carries the
shade or reflector as before, being mounted on axes a.
Figs. 5 and 6 show horizontal and vertical views of a third arrangement
of apparatus, in which the position of the reflector on the grooved segment or
segments B is regulated by the aid of a tongue piece F, which takes into the
grooves of the segment, and so fixes the reflector in position:
Figs. 7 and 8 show horizontal and vertical views of a fourth arrangement,
in which the grooves of segments B are dispensed with, the rings A, G, being
respectively held in the inclined position by the aid of an elastic stop H, of
metal or other material, which is caused to exert sufficient pressure on the
segment B to hold it in position.
Fig. 9 represents a perspective view of another arrangement, in which the
segment B is made of a V form, the reflector being held in position by the fric-
tional contact of a tongue F taking into the hollow of the V shaped segment B.
Fig. 10 represents a perspective view of a sixth arrangement, in which the
segment B presents its edge instead of its flat surface for effecting frictional
contact with tongue F, which is caused to grip the edge of B, and so hold the
reflector in any position.
Fig. 11 shows a perspective view of a seventh arrangement, in which the
segment B is made flexible, and either grooved or not, its elasticity affording
the necessary pressure for holding the reflector in an inclined position.
Fig. 12 shows a plan of an eighth arrangement, in which the reflector is
supported by pressure exerted on the rings or concentric zones A, G, by the
aid of springs J, placed between their axes, or it may be metallic, or other
flexible parts, serving to maintain the two rings in their relative inclined
positions.
Fig. 13 shows a vertical section of a ninth arrangement, in which the
apparatus is fixed in position without the aid of a chimney, and may be con-
sequently applied to other modes of lighting. The ring A. carries two
sockets a, a, fitted into rods k, k, suitably fixed to the candle by means of
a ring L, so, as to permit of the reflector being raised or lowered, which may
be further inclined by either of the means herein described.

page_text: The Invention thus consists in the improved methods of mounting the
shades or reflectors of lamps and other burners for the purpose of reflecting
the light on any suitable point, the peculiar feature consisting in the employ-
ment of two zones or rings oscillating the one on the other, and fixed in any
position by friction applied in the manner described.