Improvements in and relating to Slip Bolts or Fasteners.
Year: 1895

page_text: Date of Application, 21st Nov., 1895
Complete Specification Left, 13th Aug., 1896-Accepted, 19th Sept., 1896
PROVISIONAL SPECIFICATION.
Improvements in and relating to Slip Bolts or Fasteners.
I, HUGH KERR, of 96 King Street, Helensburgh, Dumbartonshire, Joiner, do
hereby declare the nature of my invention to be as follows :—
This invention has reference to and comprises improvements in and relating to
slip bolts or fasteners for locking or securing doors, window sashes, and applicable
to purposes generally where slip bolts are used.
According to my improvements, I form a housing for the slip bolt consisting of
a tube formed on a screwed down plate. This tube would have a spiral or helical
slot cut or formed in it; and a hand knob or pin would be fitted or formed on the
slip bolt to move within the slot. Thus by turning or oscillating the hand knob the
slip bolt will be similarly moved to its locked or released positions. A projection
would be formed at the one end of slot to retain the hand knob and act as a locking
stop for the slip bolt in its released position. Similarly a stop projection would be
formed on screwed down plate carrying the tubular part of housing which the slip
bolt enters in its locking position and a pin or stud on the bolt would turn round
past this projection and be retained in position; and in addition to the fixed stop
projection a spring catch may be used for engaging over pin and retaining the bolt
in locking position.
Dated this the 20th day of November 1905
W. R. M. THOMSON & Co.,
96, Buchanan Street, Glasgow, Agents.
Improvements in and relating to Slip Bolts or Fasteners.
I, HUGH KERR, of 96 King Street, Helensburgh, Dumbartonshire, Joiner, do.
hereby declare the nature of my invention and in what manner the same is to be
performed to be particularly described and ascertained in and by the following
statement in writing that is to say :-
This invention has reference to and comprises improvements in and relating to
slip bolts or fasteners for locking or securing doors, window sashes and applicable
to purposes generally where slip bolts are used.
And in order that my said invention may be properly understood, I have here-
unto appended a sheet of explanatory drawings in which Figure 1 represents a
perspective view of my improvements as applied to a slip bolt or fastener suitable
for a window and Figure 2 a corresponding view of same as applied to a bolt for a
door or the like.
Referring to these drawings
:-
According to my improvements I form a housing for the slip bolt B consisting
of a tube A formed on a screwed down plate A. This tube A¹ would have a
spiral or helical slot or slots a cut or formed in it and a hand knob or pin B¹ would
be fitted or formed on the slip bolt B to move within the slot a. Thus by turning
or oscillating the hand knob B' the slip bolt B will be similarly moved to its

page_text: locked or released positions. As shown in Figure 1, a stop projection C would
be formed on screwed down plate A' carrying the tubular part A¹ of housing
which the slip bolt B enters in its locking position, and a pin or stud B³ on the bolt B
would turn round past this projection C and be retained in position, and as shown
in Figure 2 in addition to the fixed stop projection C which in this case would be
formed on the plate A, a spring catch C¹ would or may be used for engaging over
pin B and retaining the bolt B in locking position.
A projection D may, as shown in Figure 1, be formed at the one end of slot to
retain the hand knob B¹ and act as a locking stop for the slip bolt in its released
position.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what [
claim is :-
First. Slip bolts or fasteners constructed substantially as herein described in
reference to and shown in the accompanying drawings.
Second. In combination with slip bolts or fasteners working within helical
slotted housings, the fitting of a projecting pin or stud on the bolt, to abut
against a stop projection on the screwed down frame plate, substantially as
herein described in reference to and shown in the accompanying drawings.
Third. In combination with the elements covered in Claim 2, a spring catch for
retaining the bolt in locking position substantially as herein set forth.
Dated the 10th Aucrat 1900
W. R. M. THOMSON & Co.,
96 Buchanan Street, Glasgow, Agents.