IMPROVEMENT IN RACKS FOR FORWARD AND BACKWARD MOVEMENT
Year: 1885

page_text: The Title of this Specification was, upon the 3rd day of November 1886, amended
under Sections 18 to 21 of the Patents, Designs, and Trade Marks Act, 1883.
WILLIAM HENRY PIKE Albion Hotel Lanark N.B. Bell maker do hereby declare
the nature of my invention for IMPROVEMENT IN RACKS FOR FORWARD AND
BACKWARD MOVEMENT to be as follows:--
My invention consists of a circular plate with teeth, made of metal or any other
suitable material, which turns on a pivot or screw fixed in the swing frame bearing
the glass. The plate has a slot below the teeth, to permit of a pivot or screw
being fixed to the upright support, which will act as a guide in setting the mirror
to any required angle at either side of the upright support. These pivots or screws
can be fixed vice a versa. The plate also may be fixed on the bearing, supporting
the swing frame in the upright support; & a pivot or screw fixed through the slot
of the plate to the swing glass enables me to move the swing glass to any angle
forward or backward from the upright support.

page_text: Hinged Frames or other Articles at Various Angles as Required.
I, WILLIAM HENRY PIKE, Albion Hotel, Lanark 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 is designed mainly for looking glasses but is also applicable for
pivoted window sashes, writing desk tops, rise and fall brackets in shops, some
forms of ventilators having pivoted valves, and many other articles hinged or
pivoted, and required to stand rigidly at various angles as adjusted.
My invention is best described by aid of the accompanying drawings in which
Figure 1 shows a rack as applied to a looking glass, an article which is required
only to oscillate through an angle of 45 degrees on one side the vertical. In this
figure the rack is attached to the glass frame, and is above the pivot of the glass.
Figure 2 shews the rack attached to the standard and placed below the glass,
and without altering the form of the rack.
Referring to Figure 1, A is the screw through a hole in the rack plate, attaching
it to the glass. B slot or race of circular or curved contour with its centre
coinciding with the centre line of the pivots of the glass, when pin C is sliding in
the slot. C pin on standard working in slide B, D parallel sided teeth in slide B,
having both sides tangential to the circle of oscillation of the rack at these
particular points, these teeth hold the glass from oscillating in either direction.
E handle. So long as the rack is in the position shown in Figure 1 the pin can
traverse the slot freely. The moment however the rack is depressed the pin C
catches in one of the teeth D, and the glass is locked in place in both directions.
I am aware that a straight ratchet rack has been proposed already, but the
disadvantage of this is that a slight knock moves it to a further angle and it has
to be brought back. The rack may also be used below the glass pivot. In such
case it is best to attach it as in Figure 2. In this case however the glass cannot
oscillate freely without moving the rack, but the rack must be raised by hand as
the glass is pulled out of the perpendicular, then pressed into place for locking.
In this case however an advantage is caused by the curvature, and making the pin
in the glass at greater distance from the pivot of the glass than the pivot of the
rack, as by this means no matter what the position of the glass the rack curves
down beside it. In these cases the angle of oscillation of the glass or moving
frame is only required to be about 45 degrees, but where a much larger degree of
oscillation is required the action is the same, the pivot on which the rack oscil-
lates being beyond the extremity of the track of the oscillating pin sufficiently for
the slide to be depressed, enough to let the nearest teeth catch on the pin when
required.

page_text: Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed, I declare that what
I claim is:
1st. The combination with a hinged or pivoted frame or other article, of a pin
on either the fixed support, or the oscillating piece, and a rack hinged or pivoted
on the other of them, said rack having approximately parallel sided teeth tangential
to the circle of oscillation of the rack so as to lock the pin in both directions, and
a slot formed with sufficient space between the ends of the teeth and the back of
the slot, for the pin to clear the teeth in passing substantially as described.
2nd. The combination with a hinged or pivoted frame or other article, of a pin
fixed either to the fixed support, or the pivoted article working in a circular
slotted piece, hinged at one point to the other of them, the said piece having a
circular or curved slot of a radius equal to the distance between the pin and the
centre of oscillation of the pivoted article and having on its side, a series of teeth
for the purposes described.
3rd. An attachment, substantially as herein described for holding pivoted or
hinged frames formed with a curved race for the pin to slide in teeth on one side
of said race, to catch the pin when required-A handle at one end beyond the rack,
and a pivot at the other end beyond the rack, upon which pivot the whole piece is
free to turn in the direction to which the centre lines of the teeth are approximately
tangential, substantially as described.

page_text: WILLIAM HENRY PIKE Albion Hotel Lanark N.B. Bell maker do hereby declare
the nature of my invention for IMPROVEMENT IN RACKS FOR FORWARD AND
BACKWARD MOVEMENT to be as follows:
'
My invention consists of a circular plate with teeth, made of metal or any other
suitable material, which turns on a pivot or screw fixed in the swing frame bearing
the glass. The plate has a slot below the teeth, to permit of a pivot or screw
being fixed to the upright support, which will act as a guide in setting the mirror
to any required angle at either side of the upright support. These pivots or screws
can be fixed vice a versa. The plate also may be fixed on the bearing, supporting
the swing frame in the upright support; & a pivot or screw fixed through the slot
of the plate to the swing glass enables me to move the swing glass to any angle
forward or backward from the upright support.

page_text: I, WILLIAM HENRY PIKE, Albion Hotel, Lanark 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 is designed mainly for looking glasses but is also applicable for
pivoted window sashes, writing desk tops, rise and fall brackets in shops, some
forms of ventilators having pivoted valves, and many other articles hinged or
pivoted, and required to stand rigidly at various angles as adjusted.
My invention is best described by aid of the accompanying drawings in which
Figure 1 shows a rack as applied to a looking glass, an article which is required
only to oscillate through an angle of 45 degrees on one side the vertical. In this
figure the rack is attached to the glass frame, and is above the pivot of the glass.
Figure 2 shews the rack attached to the standard and placed below the glass,
and without altering the form of the rack.
Referring to Figure 1, A is the screw through a hole in the rack plate, attaching
it to the glass. B slot or race of circular or curved contour with its centre
coinciding with the centro line of the pivots of the glass, when pin C is sliding in
the slot. C pin on standard working in slide B, D parallel sided teeth in slide B,
having both sides tangential to the circle of oscillation of the rack at these
particular points, these teeth hold the glass from oscillating in either direction.
E handle. So long as the rack is in the position shown in Figure 1 the pin can
traverse the slot freely. The moment however the rack is depressed the pin C
catches in one of the teeth D, and the glass is locked in place in both directions.
I am aware that a straight ratchet rack has been proposed already, but the
disadvantage of this is that a slight knock moves it to a further angle and it has
to be brought back. The rack may also be used below the glass pivot. In such
case it is best to attach it as in Figure 2. In this case however the glass cannot
oscillate freely without moving the rack, but the rack must be raised by hand as
the glass is pulled out of the perpendicular, then pressed into place for locking.
In this case however an advantage is caused by the curvature, and making the pin
in the glass at greater distance from the pivot of the glass than the pivot of the
rack, as by this means no matter what the position of the glass the rack curves
down beside it. In these cases the angle of oscillation of the glass or moving
frame is only required to be about 45 degrees, but where a much larger degree of
oscillation is required the action is the same, the pivot on which the rack oscillates
being beyond the extremity of the track of the oscillating pin sufficiently for the
slide to be depressed, enough to let the nearest teeth catch on the pin when
required.
Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed, I declare that what
I claim is:
1st. The combination with a hinged or pivoted frame or other article, of a pin
on either the fixed support. or the oscillating piece, and a rack hinged or pivoted

page_text: on the other of them, said rack having approximately parallel sided teeth tangential
to the circle of oscillation of the rack so as to lock the pin in both directions, and
a slot formed with sufficient space between the ends of the teeth and the back of.
the slot, for the pin to clear the teeth in passing substantially as described.
.
2nd. The combination with a hinged or pivoted frame or other article, of a pin
fixed either to the fixed support, or the pivoted article working in a circular
slotted piece, hinged at one point to the other of them, the said piece having a
circular or curved slot of a radius equal to the distance between the pin and the
centre of oscillation of the pivoted article and having on its side, a series of teeth
for the purposes described.
3rd. An attachment, substantially as herein described for holding pivoted or
hinged frames formed with a curved race for the pin to slide in teeth on one side
of said race, to catch the pin when required-A handle at one end beyond the rack,
and a pivot at the other end beyond the rack, upon which pivot the whole piece is
free to turn in the direction to which the centre lines of the teeth are approximately
tangential, substantially as described.