Year: 1886

page_text: Date of Application, 16th Oct., 1886.
Complete Left, 15th July, 1887.
Complete Accepted, 2nd Sept., 1887.
I GUSTAVE WILHELM MOHRSTADT Greenfield Street Harbourne near Birmingham
in the County of Warwick Manufacturer do hereby declare the nature of this invention
to be as follows:-
This invention consists in the combination and arrangement of parts forming a
ruler, suitable for ruling parallel lines on slates, or any other substance.
In carrying out my invention I provide two scribing legs; I lay the scribing legs
together one over the other and connect them at the back part by means of a rivet, or
other equivalent fastener, so that the points can be removed to any required distance
from centre to centre.
I make one of the scribing legs longer than the other; the extra part is extended
beyond the rivet or other fastener and then formed into a screw: the axis of the
screw is situated transversely to the longitudinal plan of the scribing leg.
I thread a suitable nut onto the screw, the nut would by preference be round but
it may be of any other configuration: I provide a case which would be made out of
sheet metal or other suitable material in the case I provide a long slot piercing
through one or both sides thereof, I take the pair of riveted scribing legs, pass them
into the case, the nut entering the longitudinal slot: the case is made of sufficient
length to receive and cover the scribing legs and thus protect the points and enable a
person to carry the completed article in the pocket.
When using the completed article to rule parallel lines it is merely necessary to
slide the legs along the case until they protrude beyond the end of the said case, the
nut would at the same time slide within the longitudinal slot.
In order to adjust the scribing legs to any desired distance from centre to centre,
I revolve the nut on the screw, and as the nut fills the slot and therefore cannot move
side ways or transversely it consequently revolves on the screw thereby drawing the
screw through the said nut and revolving the one scribing leg on the rivet thereby
describing an are with the scribing end of the leg, the distance from centre to centre
can therefore be regulated to suit the purposes of the user.

page_text: In order to secure the scribing legs from slipping back when they are pressed
outside the case ready for use, I provide a paul spring taking into one of the scribing
legs and passing outside the case: when sliding the scribing legs along the case ready
for use the paul of the spring would protrude through the case and thus lock the
scribing legs in position by pushing the paul back by means of the nail into the
case the scribing legs can be drawn back into their normal position: I provide a
cap which may be permanently fixed on the back end and would thus retain the
scribing legs permanently within the case, or the said cap may be oscillated on a
pivot pin. In some cases I provide a movable cap on the front end of the case.
:
Dated this 14th day of October 1886.
ALFRED WILLIAM TURNER,
Cobden Buildings, Corporation Street,
Birmingham,
Agent for the Applicant.
An Improved Scriber for Ruling Parallel Lines.
I GUSTAVE WILHELM MOHRSTADT Greenfield Street Harbourne near Birmingham in
the County of Warwick Manufacturer 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 consists in the combination and arrangement of parts forming a
scriber, suitable for ruling parallel lines on slates, or any other substance.
In carrying out my invention I provide two scribing legs; I lay the scribing legs
together one over the other and connect them at the back part by means of a rivet,
or other equivalent fastener, so that the points can be removed to any required
distance from centre to centre.
I make one of the scribing legs longer than the other; the extra part is extended
beyond the rivet or other fastener and then formed into a screw: the axis of the screw
is situated transversely to the longitudinal plan of the scribing leg.
I thread a suitable nut on to the screw, the nut would by preference be round but
it may be of any other configuration: I provide a case which would be made out of
sheet metal or other suitable material in the case I provide a long slot piercing through
one or both sides thereof, I take the pair of riveted scribing legs, pass them into the
case, the nut entering the longitudinal slot the case is made of sufficient length to
receive and cover the scribing legs and thus protect the points and enable a person
to carry the completed article in the pocket.

page_text: When using the completed article to rule parallel lines it is merely necessary to
slide the legs along the case until they protrude beyond the end of the said case, the
nut would at the same time slide within the longitudinal slot.
In order to adjust the scribing legs to any desired distance from centre to centre,
I revolve the nut on the screw, and as the nut fills the slot and therefore cannot move
side ways or transversely it consequently revolves on the screw thereby drawing the
screw through the said nut and revolving the one scribing leg on the rivet thereby
describing an arc with the scribing end of the leg, the distance from centre to centre
can therefore be regulated to suit the purposes of the user.
In order to secure the scribing legs from slipping back when they are pressed
outside the case ready for use, I provide a paul spring taking into one of the scribing
legs and passing outside the case: when sliding the scribing legs along the case ready
for use the palil of the spring would protrude through the case and thus lock the
scribing legs in position by pushing the paul back by means of the nail into the
case the scribing logs can be drawn back into their normal position. I provide a cap
which may be permanently fixed on the back end and would thus retain the scribing
legs permanently within the case, or the said cap may be oscillated on a pivot pin.
In some cases I provide a movable cap on the front end of the case.
I will now proceed to describe with reference to the accompanying drawings the
manner in which my invention is constructed and used.
Figure 1 represent a sectional view of the case inside which is placed the scribing legs.
Figure 2 represents a sectional view of the case edgeways the scribing legs are also
shown in the case edgeways.
Figure 3 represents the scribing legs in the case ready for use.
Figure 4 represents a plan of case Figure 3.
Figure 5 represents the scribing legs formed with a slot in the face or side of the
leg or legs.
Figure 6 represents an edge view of Figure 5.
It will be observed that one of the scribing legs shown at Figure 1 is longer than
the other and that the projecting part is bent at right angles and formed into the
screw a the nut & when passed on to the screw a revolves in the open slot c: the
leg d remains stationary: the lege is adjusted in the following manner.
The distance from side to side of the boss of the nut 6 is equal to the width of the
slot c, consequently when the nut b is rotated on the screwed part a the face of the
nut 6 would press against the side g of the slot c and cause the screwed part a to enter
the nut b and thereby move the point h of the leg e away from the stationary point j
of the leg d; the points jh can then be used for scribing or cutting parallel lines on
school slates or for other purposes; the lines would when ruled be of the width or
distance from j to h.
I can make my scribing legs of any dimensions to suit the width intended to be
ruled but whatever the dimensions may he the point would be moved to its greatest
dimensions from the point in the manner hereinbefore described.
To rule parallel lines of a less width than the distance from j to h 1 should rotate
the nut & from left to right that is to say unscrew it and thereby move the leg e on
its pivot m and consequently move the point of the lege nearer to the point of the
leg d.
The paul spring is in some cases inserted into the leg e in the manner illustrated
at n figure 1 and when so secured, one end of the spring protrudes from the case
through the opening as shown at k¹ figure 3 and thereby lock the scribing legs outside
the case ready for use.
The paul shaped spring can in some cases be inserted into the slot o which is pierced
in either of the legs as represented at figure 5; the paul spring would then expand in
the direction shewn at k ligure 5 and one end of the said paul spring would protrude
through the side or front of the case as shown at the opening figure 3.
The ends of the legs instead of being pointed suitable for scribing slates in the
manner shewn at j-h may be fitted at p-y with sockets to hold pencils pens or other
marking instruments.

page_text: To close the legs inside the case the paul would be pushed back by exerting pressure
at kor k³, the legs can then be drawn back the curled end k¹ or k³ would slide up
and bear against the inner edge of the case.
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
1st. The making of a scriber in the manner described and illustrated for the purpose
of ruling parallel lines.
2nd. In a parallel scriber the combination of the legs e and d sliding inside a case,
one of the legs being provided with a screwed end on which is threaded a nut, the
nut rotating on the screwed end for the purpose of adjusting the points of the scribing
legs at varying distances apart.
3rd. On the case of a parallel scriber a measuring index.