Improvements in Clock Cases.
Year: 1891

page_text: Date of Application, 30th Jan., 1891
Complete Specification Left, 1st May, 1891-Accepted, 6th June, 1891
PROVISIONAL SPECIFICATION.
Improvements in Clock Cases.
I, HENRY SMITH PRENTISS, of 1264 Waverly Place, North Elizabeth, in the
County of Union and State of New Jersey, one of the United States of America,
Mechanical Engineer, do hereby declare the nature of this invention to be as
follows:-
The clock case is especially adapted for calendar clocks and is made in two
longitudinal parts, the back being adapted to be secured to the wall and the front
constructed to slide over the back, to which latter it is removably secured by any
suitable means, such for instance as a pin and hook.
The clock movement, inclusive of the dial, as well as the calendar movement
are secured to the back so that when the front is removed by simply releasing
its fastenings and withdrawing the same, the works remain operative and un-
disturbed upon the back and are open for inspection and repairs. The pendulum
is made to pass in the rear of the calendar and the rating bob thereof projects
through an opening in the case so that the pendulum can be adjusted without
removing the front. In order that the front can be removed without interfering
with the pendulum, as for instance for the purpose of winding the calendar
movement or for inspecting the works, the opening extends to the rear edge of the
bottom of the case.
In some cases, I have found it advisable to close the opening in the bottom of
the case and for this purpose I make use of a sliding door which is provided with
a recessed portion or pocket to permit the oscillation of the pendulum. It is
secured to the front, over the opening, by means which will permit it to be readily
removed when the pendulum is to be regulated. The door could be hinged if so
desired.
1 T
ሰለ
H. S. PRENTISS.
By Harris & Mills,
23, Southampton Buildings, London, W.C., Agents.
COMPLETE SPECIFICATION.
Improvements in Clock Cases.
I, HENRY SMITH PRENTISS, of 1264 Waverly Place, North Elizabeth, in the
County of Union, and State of New Jersey, one of the United States of America,
Mechanical Engineer, 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 has reference to improvements in cases for clocks and especially for
calendar clocks,.and it consists essentially in a sectional case constructed in such a
manner as to facilitate the operation of placing the movement into the case; to
permit the front of the case to be removed for exposing the movement in all its
parts for inspection and repairs without disturbing the said movement and finally to
permit the ready adjustment of the pendulum the winding of the spring and the
setting of the hands, without removing the front.
The novel features of my invention are more fully pointed out in the following
Specification and claim and illustrated in the accompanying drawings, in which:
Figure 1 represents an elevation of the interior of the front of the case as
constructed for a calendar clock.
Figure 2 is a longitudinal section of the case and movement complete.

page_text: Figure 3 is a perspective view of a detail part.
Similar letters indicate corresponding parts.
In these drawings, the letter B designates the back of the case, constructed of
two vertical stringers a. a. united by a number of horizontal cross pieces b. b. the
whole being covered with a thin backing c, of wood or other suitable material.
The back can be secured to the wall by any usual means.
The movement C of any suitable construction is secured to two of the upper
éross pieces b. b. the dial D¹ being rigidly attached to the frame of the movement.
The front A which I construct in the shape of a box, is adapted to fit over the
back and thereby cover the movement, the connection of the two being practically
dust tight. The back is secured to the latter by any suitable means, such for
instance as the hook a¹ and the post b¹ arranged to be engaged by said hook; if
desired any additional fastening may be provided at the bottom of the case.
In the front of the case, opposite the dial D', is an opening / closed by a
window capable of being opened and closed from the exterior of the case to
permit the hands to be set or the clock to be wound without removing the front of
the case.
The calendar movement C₁ is secured to the back and suitable openings as i. j. k
are made in the front, opposite the cylinders and plates bearing respectively the
names of the days and months and the dates, said openings being closed by glass
or similar transparent material.
The pendulum D is made to pass in the rear of the calendar movement C¹ and
the adjusting nut E upon which the bob E' rests, projects through an opening F
in the bottom d of the case, so that the bob can be readily adjusted without
necessitating the removal of the front. In order that the front can be removed
without interfering with the pendulum as for instance for the purpose of winding
the calendar movement, or for inspecting the works, the opening F extends to the
rear edge of the bottom d.
In the example illustrated in the drawing, I have shown the front A provided
with a lower ornamental portion e consequently an auxiliary slot or opening ƒ
of the same length as the opening F must be made therein to permit the removal
of the front. When the back B is provided with a bottom at d', a corresponding
opening is made in the same.
In some instances, I have found it advisable to close up the opening or openings,
and for this purpose, I make use of a door, such as G, which is provided with a
recessed portion or pocket f2 to permit the oscillation of the pendulum.
It can be secured to the front by any suitable means, such for instance as the
pins g. g. on the case adapted to engage the slots or grooves g' g' in the ends of the
door. This arrangement permits the ready removal of the door when the clock is
to be regulated. If made of metal the door, of course, could be made hollow
throughout.
It will be readily understood from the above description that the movement can
be readily secured to back and the front then applied, and that the front can be
removed without disturbing, the hands, the dial or the pendulum.
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 :---
1. A. clock case consisting in its back part of two vertical stringers, horizontal
pieces to two of which are secured a clock movement and to the others are secured
the frame of rotary indicator blocks and plates for calendar exhibit, and a thin
backing e, all firmly secured together; and consisting in its front of part A, box
shaped, and provided with an opening and a hinged door to fit over the time
movement, dial, and openings with fixed transparent covers to fit over the calendar
inscriptions; said case being arranged with a view to having the cover of the
clock movement and other moving parts detachable without removing the back
or frame to which said moving parts are attached, as set forth.

page_text: 2. In a clock case, a back and a removable front provided with an opening in its
bottom for the passage of the pendulum, said opening being constructed to permit
the removal of the front without disturbing the pendulum, substantially as
described.
3. A clock case having an opening in its bottom for the passage of the adjusting
nut of the pendulum, in combination with a removable door adapted to close said
opening, substantially as described.
4. A clock case having an opening for the passage of the adjusting nut of the
pendulum, in combination with the door G, pins g g and slots g¹ g₁ substantially as
described.
5. In a calendar clock, a pendulum passing in the rear of the calendar movement
and projecting through an opening in the bottom of the case, substantially as
described.
Dated May 1st 1891.
H. S. PRENTISS.
By Harris & Mills,
23, Southampton Buildings, London, W.C., Agents.