An Improved Means for Securing Head-rests, Carriage-windows, and. other Vertical Slides or Frames in Position.
Year: 1891

page_text: Date of Application, 24th Nov., 1891
Complete Specification Left, 23rd Aug., 1892-Accepted, 1st Oct., 1892
PROVISIONAL SPECIFICATION.
An Improved Means for Securing Head-rests, Carriage-windows, and.
other Vertical Slides or Frames in Position.
THOMAS HALL of 10 Villiers Road Willesden Green N.W. do hereby declare
the nature of this invention to be as follows:-
An improved means for securing head rests carrage windows & other vertical
slides or frames in position.
The invention consists of an arm of wood, mettle, or other material, sliding
bettween guides fixed to a foundation.
A. mettle rod to which a cam is attached is incerted in a grove in the arm the
cam on being released falls by its own weight against a mettle rack fixed in
the foundation & fixes the arm or frame in possission.
COMPLETE SPECIFICATION.
An Improved Means for Securing Head-rests, Carriage-windows, and.
other Vertical Slides or Frames in Position.
I, THOMAS HALL, of 10 Villiers Road, Willesden Green, in the County of
Middlesex, Carpenter and Builder, 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 :-
My invention relates to improved means whereby head-rests such as are used
by hairdressers, photographers or dentists, and carriage-windows and other vertical
slides or sliding frames may be secured in any position to which they may be
adjusted.
My said invention is designed to facilitate the adjustinent of such vertical slides
or sliding frames, and to obviate the necessity for the use of springs and set-screws
in the fastenings for securing the said slides or frames in position, the fastenings
containing springs being objectionable by reason of the liability of such springs to
break or become weak, and those comprising set-screws being objectionable because
of the necessity of using two hands to adjust the slide or frame, one to hold the
said slide or frame and the other to slacken and tighten the set-screw.
According to my said invention, I attach a suitable rack to the part in which the
slide or frame works, and combine with the said slide or frame a cam or pawl
provided with a suitable weight whereby it is caused to engage with the said rack
for the purpose of supporting the slide or frame in any position to which it may be
adjusted. I also provide a projecting arm or other convenient device whereby the
pawl may be readily disengaged from the rack by hand when it is desired to raise
or lower the slide or frame.
In the accompanying drawing I have shown how my said invention may be
conveniently and advantageously carried into practice.
Figure 1 is a vertical central section of part of a slide provided with my
improvd fastening, and
Figure 2 is a section on the line a, a, Figure 1.
a is a vertical slide which works in guides b, b attached to a standard, frame or
other support c.
d is a rack which is secured in a groove in the said support c.
e is a pawl which is pivoted at e¹ to the slide a and to which is connected a rod or
weight enclosed in the said slide and provided with an arm f' projecting through
a slot in the slide a.

page_text: The rod or weight holds the pawl e in engagement with the rack d and thus
retains the slide a in position. By placing the finger under the projecting arm
and lifting the rod or weight f the pawle can be readily disengaged from the
rack d; the slide a can then be raised or lowered as required, and as soon as
the rod or weight is released, it will cause the pawl e to again engage with
the rack d.
It is obvious that the arrangement of the parts can be modified without departing
from the nature of my said invention.
It is evident, moreover, that my improved fastening can be applied as above
described or in any other convenient manner to carriage-windows and to other slides
or sliding frames.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed declare that what I
claim is:
The improved means for securing in position head-rests, carriage-windows and
other vertical slides or sliding frames, substantially as hereinbefore described.
Dated this Twenty-second day of August 1892.
i
D. Young & Co.,
THOS. HALL.
11 & 12, Southampton Buildings, London, W.C., Agents for the Applicant.