048
TELETYPE ASR-33 MODEL 3320 6WA (c1970)
Teletype
80*60*100
Grey metal & plastic paper tape punch, 7-bit CCITT No. 5 U.S.
ASCII keyboard. Automatic Sending and Receiving unit, combines
a keyboard, page printer, reperforator (paper tape punch) and
tape transmitter. Can transmit directly from keyboard or paper
tape. Receives either by page printing or punching paper tape.
Tape may be punched from keyboard while off-line for later transmission.
Uses ASCII codes.
Used as a terminal with the first PDP-11 in Queensland from 1973 and with phase ionosode until 1984.
References:
T.E.
049 IBM CARD PUNCH MODEL 29 (c1970)
International Business Machines
90*75*84
Keyboard and card bed assembly mounted on desk. Card bed assembly
has (covered) removable program drum with 'starwheel' cogged wheels;
punch station with punching mechanism; read station with cogged
wheels. Keyboard has various switches for card bed mechanism control.
Punched cards have 12 rows and 80 columns. Card punch creates
new punched cards from data entered from keyboard or replicates
other punched cards. Each card holds 80 characters. Operation
can be controlled by program card, with 1 or 2 punch control programs(s)
on it. The program card is read by cogged wheels which rotate
in accordance with the punched pattern on the program card. Cards
are punched at the punch station by small arm punches. Cards to
be duplicated are also read by cogged wheels. Card punches such
as this were mainly used to store programs written in FORTRAN.
References:
G.P.
50 9820A PROGRAMMABLE CALCULATOR (c 1971)
Hewlett-Packard Company, USA, No. 1144A00875
45*54*14
The desk-top calculator has a metal casing with a plastic front. Its features include LED display, 5K RAM, 95-key keyboard, magnetic card storage and printer. The program memory can store up to 500 program steps, and the data memory can store 51 data numbers. The calculator has three slots designed for plug-in special purpose ROMs called function blocks. These allow the user to upgrade to higher mathematics capabilities, including statistical computations, or add on optional peripherals. Function blocks MATHEMATICS 11221A and PERIPHERAL CONTROL I11220A are installed. Programs and data can be recorded on magnetic cards. The cards are six inches long, and up to 500 program steps can be stored on each side. The printer uses paper rolls 3 inches in width. The similar 9810A model was priced at $US2,975.
An operating and programming manual for the 9810A model has also
been kept.
AS
Computer: 36x13x50
Monitor: 27x40x38 (12" screen)
IBM XT computer with two 5.25" floppy drives (360Kb), 640Kb RAM, 20 Mb hard disk drive, 8088 processor, 8087 co-processor, 1 parallel & 1 serial port. Missing graphics card. Model 5160. S/N 61497135160.
EGA monitor, model 5154003. S/N 04/85 30100/3
Keyboard also included.
From the serial number of the monitor, it appears to date from April 1985. The XT was released on March 8, 1983, so this model is a later one. The XT is a descendent of the IMB PC released in 1981. At release, these systems cost $7545. This particular machine was produced in Wangaratta, Victoria. It was used by the University of Queensland Physics Department Computer Systems Manager until 1992.
Reference:
1. http://www.can.ibm.com/helpware/5160.html
214
W & G Dualface Comprehensive slide rule model 432
35*5*1
The "Dualface" comprehensive slide rule (Model 432), is a white celluloid covered wooden rule approximately 35 cm in length boasting a metallic framed cursor with thumbwheel for smooth cursor movement. Markings on the rule include sine, kW, hp, tangent, voltage drop, dynamo/motor efficiency, loglog, log and reciprocal, suggesting that the primary function was for use by electrical engineers.
The manufacturers were A.E. White and J.D. Gillespie (W&G), an Australian company based in Melbourne. W&G was originally engaged in producing duplicate printing plates since 1910 and only began manufacturing slide rules at the conclusion of World War II (1945), dating this rule from anywhere between 1945 to the 1960's when slide rules were surpassed by electronic calculators.
References:
1. Landis, F., Slide Rule, Microsoft Encarta 96 Encyclopedia, Funk & Wagnalls Corporation.
2. W&G home page (history),
224
FULLER'S CYLINDRICAL SLIDE RULE (The Fuller Calculator) (1907)
W.F. Stanley & Co. Ltd., London
Serial Number 2449 1907
Also marked PLUQ E534 3B_D_5 P98 S.G. LUSBY in case
This piece is composed of a laquered cylinder with a mahogany handle at one end, in total 33 cm long. On this cylinder is mounted an outer cylinder 15 cm long and 7.5 cm in diameter. The scales, originally probably white, are considerably yellowed. The calculator has a total mass of about 900 g not including the mahogany case which accompanies it.
On the outer cylinder is a helical logarithmic scale 500" (41'8" or about 12.5 m) in length. This cylinder can be slid and rotated upon the inner one and hence with the correct sequence of movements, multiplications and divisions can be made and the answers read off the two pointers which project over the cylindrical scale. Results can be obtained to four and frequently five decimal places. The calculator may be used either held in the hand or mounted on the end of its case, although this example has no mounting bracket on the case. On the inner cylinder is a scale or logarithms to four decimal places and a scale of sines. (Two other models were available - one has a table of useful data in place of the two scales; the second (the Fuller-Bakewell calculator) has a scale of cos2a and sinacosa and is intended for Tacheometrical Surveying).
This calculator originally belonged to S.G. Lusby, who was appointed as an assistant lecturer at The University of Queensland in 1912, and who remained with the Physics Department for several decades.
References:
1. R.K. Allan, Systematic Slide Rule Technique, Sir Isaac Pitman & Sons Limited, London, 1962, p96-99.
2. C.N. Pickworth, The Slide Rule - A Practical Manual, 21st Ed (Rev), Sir Isaac Pitman & Sons Ltd., London, 1938, p92-94.
AM
237
RADIO TRANSMISSION LINE CALCULATOR (c 1945)
>W&G< Melbourne, Australia/PLUQ P3065D
A circular slide rule of outer diameter 240mm, an inner circle of diameter 210 mm and a radial arm of width 40mm. A slider, with a horizontal cross-wire, slides on the radial arm. A central metal rivet holds the individual sections together and allows the radial arm and inner circle to rotate independently of the outer circle. The two circles are made of a white celluloid material and the radial arm and slider are transparent acrylic. The rear side of the calculator contains detailed instructions as to the use of the calculator. The instructions include six examples of parameter measurements using the calculator. The calculator has a leather pouch, for storage, which is marked with the letters PTO.
A number of scales are provided on the calculator to perform useful transmission line calculations. The main scale is an impedance co-ordinate grid. The grid is engraved onto the inner circle and each point in the grid gives the resistive and (positive and negative) reactive components of the impedance as a fraction of characteristic impedance. A diameter is marked with the resistance scale, which ranges from 0-50. The circumference of the inner circle contains the scale for reactance with two semi-circles marked from 0-50 - one for positive reactance and the other for negative reactance.
The outer circle has two scales around its circumference. These scales are marked from 0-0.50 and measure wavelengths toward the load and wavelengths toward the generator. The radial arm has a central cross-wire running down its length and eight parallel scales arranged either side of the cross-wire. The cross-wire, in conjunction with the slider cross-wire, acts as a crosshair for plotting impedances on the inner circle. The slider cross-wire also intersects the other radial arm scales. These scales are divided into two groups with four scales devoted to measurement of Voltage or Current Standing Wave Ratio (SWR) and four scales for measurements of Attenuation.
The Radio Transmission Line Calculator is capable of plotting quantities in four major groups of parameters:
1. Impedance or Admittance - Reflection coefficient magnitude and angle (in degrees)
2. Length of Line between any two points (wavelengths)
3. Attenuation between any two points (decibels) - Standing wave loss coefficient and Reflection loss (decibels)
4. Voltage or Current SWR (decibels) - Limits of Voltage and Current due to standing waves.
The particular calculator in possession of this Museum was originally manufactured for use in the Directorate of Airways, Department of Civil Aviation, the Commonwealth of Australia. The calculator was used in the Physics Department during a period of extensive radio and ionospheric research in which a number of antenna arrays were constructed and transmission lines assembled. The calculator shows signs of extensive use with pencilled calculations still evident on the face of the calculator.
Two references are mentioned in the instructions printed on the rear of the calculator. These references are articles written by the designer of the calculator, Phillip H. Smith. The calculator was designed in the Radio Development Department of Bell Telephone Laboratories, New York City. The articles describe, in detail, the use of the calculator for all the calculations it can perform. Also, details of construction of a similar calculator are given.
References:
1. P.H. Smith, Electronics, Transmission Line Calculator, pp130-133, 318-325 (Jan 1944)
2 P.H. Smith, Electronics, Transmission Line Calculator, (Jan 1939)
DW
355
PLANIMETER (c1960) / Type: KP-26 #2847
Koizumi, Japan
21 * 24 * 3 cm
Donated by Department of Electrical Engineering, The University of Queensland.
Category: Mechanical Polar Planimeter.
This instrument is able to mechanically measure the area of plane figures.
The pole weight is placed on the desk. The pole arm connects the pole weight to the carriage while the tracer point is connected to the carriage by the tracer arm. This causes the carriage to move on a circular path, regardless of the shape the tracer point follows. The area of the figure is measured by tracing the outline of the figure with the tracer arm, and is determined by how much the measurement wheel rotated.
Parts:
Comes in a metal case covered by black vinyl and lock, packed in a protecting foam.
Instrumental Accuracy : +/- 0.2%
Max. Resolution: 0.009 sq.in
0.05
sq.cm
The Range: 9 x 19 in
25
x 50 cm
References:
D.U.W.
356
HEWLETT PACKARD HP-45 CALCULATOR 1973
Serial Number 1350A 25848
Hewlett Packard, USA.
15 x 8 x 2 .4
The calculator is cased in black plastic, with 35 buttons and an on/off switch on the front panel. Its display is composed of 15 red LED digital "letters". On the back, there is a panel that can be removed, giving access to the battery. Unfortunately, the battery pack is missing, but from the size of the space, it would have been about the size of three AA batteries.
The grey plastic case also contains a number of accessories. A black leather pocket to hold the calculator, with a belt loop on the back also contains a 22 page, spiral bound, quick reference guide. A 2m long cable connects a Singapore made US AC power adaptor to the calculator or a battery recharging unit. The prongs of the adaptor have been bent to fit a Australian power socket. The 60 page manual is also present in the case.
The HP-45 uses what is known as the "Reverse Polish" or Lukasicwicz (Loo -
ka - sh - evich) algorithm to evaluate mathematical expressions entered into
it. This method differs substantially from that employed by typical pocket calculators
today. The most visible difference is in the method one enters in an expression
to be evaluated. For example, to evaluate "2+2" one keys in 2, enter, 2, +.
The calculator operates using a "stack" of four variables: X, Y, Z & T.
As a number is keyed in, it is placed in the X register, the contents of which
is displayed on the screen. When enter is pressed, this number is copied into
the Y register, pushing the data in Y into Z and the data in Z into T. A new
number can then be keyed into the X register. Pressing "+" then adds the contents
of X and Y together, the result being copied to the X register, where it is
displayed.
The contents of the stacks can be easily cycled through, or swapped allowing for complex manipulations of data.
At the time, Hewlett Packard claimed that Reverse Polish was the most efficient algorithm for evaluating mathematical expressions known to computer science. Reverse Polish calculators are still used by many today, with some adherents claiming that, given a Reverse Polish calculator, they can evaluate any mathematical expression faster than a person with any other type of calculator.
This particular calculator was purchased by Dr BJ O'Mara in America in the early seventies, costing several hundred dollars, making it one of the first "affordable" pocket calculators. Thus the demand for this model was so great that Dr O'Mara had a wait of several months for delivery of his HP-45.
Reference: www.hpmuseum.org/
JA
500
POCKET SLIDE RULE WITH ADDIATOR
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