|Yale had a confusing numbering system
for the single and double pin dial models.
The Double pin dial with the Sunday
Attachment as well as the single pin dial
with the Sunday Attachment are designated as
No. 1 and No. 2 even though the No. 1 was
introduced in 1875 and the number 2 was not
produced until 1883. A catalog from 1883
supports this information also notice the
retail pricing. $450 in 1883 is about $9000
in 2016, see reproduction below.
|Double Pin Dial, with Sunday Attachment,
|Single Pin Dial, with Sunday Attachment,
|Double Pin Dial, w/o Sunday Attachment,
|Single Pin Dial, w/o Sunday Attachment,
Yale Model #2, c.1890. Single Pin Dial Time lock. This
lock was marketed as a smaller version of the Model #1 where size was of
greater consideration. (See last picture above). Although it has a single
pin dial vs. the double pin dial of the model #1 and #3, there still are two movements. An additional dial indicates the day of the week.
This serves the same purpose as the Sunday Dial, aka "Sunday Attachment" on
the Model #1. Although this unit is smaller than the #1, it was priced at the same $500. This model did
not sell well and was discontinued soon after introduction. Just under 500 were produced
and today fewer than 25 are known are to exist. Other examples of two movements controlled
by one dial are Beard & Brothers Type 2 and
Mosler's first time lock. 5.75"w x 4.5"h x
3.25"d. Case #96. Movement #444, file 100a
A feature unique to this type of time lock (pin dial) is that as well
as being ' off guard ' it can go ' on guard ' in accordance with the settings of the pins.
As such it is designed to run continuously, unlike the majority of time locks which go off
guard when they run down. However, if the movements are allowed to stop completely they
will take the lock off guard, despite the settings of the pins.
Yale Model #4, c. 1885. Same as below but without
the Sunday Dial option. What makes this example unique is the lack of the
weekday dial. Until this artifact surfaced it was thought that this was
integral to the design of the #2. But it was an option; and one that was not
often taken. The last two photos shows how this manifests itself in the
lever(s) that release the bolt dog. In this example there is but one lever
controlled by the two movements. In all other known examples as depicted in
the last photo, there are two separate levers each controlled respectively
by the separate movements and the weekday mechanism. The prior photo shows
the single lever in this example, an unmistakable indication of the
originality of this option, in addition to the decorative plate covering
where the weekday dial would have been installed. There are two known examples of the
Model #2 without the weekday option. 5.75"w x 4.5"h x 3.25"d.
Case #166, movement #160. file 132
Above the drawings from patent 312,925 dated February 24,
1885. According to a section in the patent abstract one of the innovations
claimed was that the entire time lock, and dogging assembly was completely
contained with the movement plates, up to this point the two were separate
Below is a page from a combined Yale and Sargent & Greenleaf
catalog showing Yale's model designation for the Double and Single Pin Dial
models. Notice the printing mistake where the Model #1 illustration is
upside down, reminiscent of the famous 'Inverted Jenny' stamp.